RESULTS OF THE U.S. GEOLOGICAL SURVEY'S ANALYTICAL 

EVALUATION PROGRAM FOR STANDARD REFERENCE SAMPLES: 

T-151 (TRACE CONSTITUENTS), M-144 (MAJOR CONSTITUENTS), 

N-55 (NUTRIENT CONSTITUENTS), N-56 (NUTRIENT CONSTITUENTS), 

P-29 (LOW IONIC STRENGTH CONSTITUENTS), GWT-2 (GROUND-WATER 

TRACE CONSTITUENTS), GWM-2 (GROUND-WATER MAJOR CONSTITUENTS), 

AMW-4 (ACID MINE WATER CONSTITUENTS), AND Hg-25 (MERCURY) 

DISTRIBUTED IN SEPTEMBER 1997

by Jerry W. Farrar

U.S. GEOLOGICAL SURVEY 

Open-File Report 98-52

Lakewood, Colorado 

1998
DEPARTMENT OF THE INTERIOR 

BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY 

Thomas J. Casadevall, Acting Director

For additional information 

write to:

Chief, Branch of Quality Systems 

U.S. Geological Survey 

Water Resources Division 

Box 25046, Mail Stop 401 

Denver Federal Center 

Denver, Colorado 80225-0046

Copies of this report can be

purchased from:

U.S. Geological Survey

Branch of Information Services

Box 25286

Denver, Colorado 80225-0286
CONTENTS

Page 

Abstract................................................................................................................................................................................................ 1

Introduction ..................................................................................................................................................................................^ 1

Purpose and scope ................................................................................................................................................................................ 2

Preparation of standard reference water samples .................................................................................................................................. 6

Laboratory analyses.............................................................................................................................................................................. 8

Laboratory performance ratings ........................................................................................................................................................... 10

Statistical presentation of data............................................................................................................................................................. 10

Reference ............................................................................................................................................................................^ 11

FIGURE 

Figure 1. Statistical parameters shown on reported-data graphs in tables 14 -22 ........................................................................... 11

	TABLES

Table 1. Laboratory participants in the analyses of standard reference samples distributed in September 1997 ........................... 3

2. Constituents determined in standard reference samples distributed in September 1997................................................... 8

3. Analytical method codes .................................................................................................................................................. 9

4. Overall laboratory performance ratings for standard reference samples distributed in September 1997 ................. 12

5. Laboratory performance ratings for standard reference sample T-151 (trace constituents).............................................. 14

6. Laboratory performance ratings for standard reference sample M-144 (major constituents)........................................... 22

7. Laboratory performance ratings for standard reference sample N-5 5 (nutrient constituents)........................................... 28

8. Laboratory performance ratings for standard reference sample N-56 (nutrient constituents)........................................... 30

9. Laboratory performance ratings for standard reference sample P-29 (low ionic strength constituents)........................... 32

10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)..................... 34

11. Laboratory performance ratings for standard reference sample GWM-2 (ground-water major constituents)................... 42

12. Laboratory performance ratings for standard reference sample AMW-4 (acid mine water constituents)......................... 46

13. Laboratory performance ratings for standard reference sample Hg-25 (mercury)........................................................... 50

14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)....................................... 51

15. Statistical summary of reported data for standard reference sample M-144 (major constituents).................................... 80

16. Statistical summary of reported data for standard reference sample N-55 (nutrient constituents)................................... 97

17. Statistical summary of reported data for standard reference sample N-56 (nutrient constituents)................................... 103

18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents).................... 109

19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents).............. 121

20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)........... 148

21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)................. 162

22. Statistical summary of reported data for standard reference sample Hg-25 (mercury)..................................................... 189

23. Most probable values for constituents and properties in standard reference samples distributed in September 1997 ... 191
RESULTS OF THE U.S. GEOLOGICAL SURVEY'S ANALYTICAL 

EVALUATION PROGRAM FOR STANDARD REFERENCE SAMPLES: 

T-151 (TRACE CONSTITUENTS), M-144 (MAJOR CONSTITUENTS), 

N-55 (NUTRIENT CONSTITUENTS), N-56 (NUTRIENT CONSTITUENTS), 

P-29 (LOW IONIC STRENGTH CONSTITUENTS), GWT-2 (GROUND-WATER 

TRACE CONSTITUENTS), GWM-2 (GROUND-WATER MAJOR CONSTITUENTS), 

AMW-4 (ACID MINE WATER CONSTITUENTS), AND Hg-25 (MERCURY) 

DISTRIBUTED IN SEPTEMBER 1997

By Jerry W. Farrar

ABSTRACT

This report presents the results of the U.S. Geological Survey's analytical evaluation program for nine standard 

reference samples -- T-151 (trace constituents), M-144 (major constituents), N-55 (nutrient constituents), N-56 

(nutrient constituents), P-29 (low ionic strength constituents), GWT-2 (ground-water trace constituents), GWM-2 

(ground-water major constituents), AMW-4 (acid mine water constituents), and Hg-25 (mercury) ~ which were 

distributed in September 1997 to 170 laboratories enrolled in the U.S. Geological Survey sponsored 

interlaboratory testing program Analytical data that were received from 146 of the laboratories were evaluated 

with respect to overall laboratory performance and relative laboratory performance for each analyte in the nine 

reference samples. Results of these evaluations are presented in tabular form. Also presented are tables and 

graphs summarizing the analytical data provided by each laboratory for each analyte in the nine standard 

reference samples. The most probable value for each analyte was determined using nonparametric statistics.

INTRODUCTION

The U.S. Geological Survey (USGS) conducts an interlaboratory analytical evaluation program semiannually. 

This program provides a variety of standard reference samples (SRSs) to accomplish quality assurance testing of 

laboratories and to provide an adequate supply of samples that contribute to quality control programs of 

participating laboratories. Natural-matrix reference materials are preferred for use in this interlaboratory 

evaluation program. A series of samples are prepared and distributed each spring and fall.

The program began in 1962 with a single sample containing major constituents that was prepared from distilled 

water and reagent grade chemicals. Twenty-three USGS laboratories participated in the first analytical 

evaluation program. Since that time, objectives of the program have been to:

(1) evaluate and improve the performance of USGS and other participating laboratories;

(2) provide a library of carefully prepared, homogeneous, stable reference materials for use in 

the quality control programs of laboratories;

(3) identify analytical problem areas;

(4) identify quality assurance needs with respect to environmental analyses and develop new 

reference materials to meet these needs; and

(5) evaluate the accuracy and precision of analytical methods.
A total of 235 USGS and non-USGS laboratories are enrolled in the program, which can currently provide nine 

different types of SRSs:

1. Trace constituents.

2. Major constituents.

3. Nutrient constituents.

4. Low ionic strength constituents.

5. Mercury.

6. Whole water (water with suspended sediment).

7. Acid mine water constituents.

8. Ground-water trace constituents.

9. Ground-water major constituents.

Though this is not a laboratory certification program, participation in this continuing quality assurance program 

is mandatory for all laboratories providing water-quality data for USGS sponsored reports or storage in the USGS 

national data bases. Federal, State, municipal, and university laboratories can participate even though they do not 

provide data to the USGS. SRS results can be used to alert participating laboratories of possible deficiencies in 

their analytical operations and provide reference materials for laboratory quality-control programs. Participating 

laboratories are identified only by a confidential laboratory code number.

A library of SRSs, from previous evaluations, is available. USGS offices and participating laboratories can 

request these SRSs for further testing, continuing quality assurance, and quality-control programs by contacting:

U.S. Geological Survey 

Branch of Quality Systems 

Denver Federal Center, Bldg. 53 

P.O. Box 25046 MS 401 

Denver, Colorado 80225-0046 

(303)236-1870

PURPOSE AND SCOPE

This report summarizes the analytical results submitted by 146 of the 170 laboratories that requested and were 

shipped SRSs for the January 1998 evaluation (table 1). Not all SRSs are requested or necessarily analyzed by 

all the laboratories; nor do all laboratories enrolled in the program participate in each evaluation. Analytical 

results for the following, which were mailed the week of September 29, 1997, are presented in this report

T-151 Trace constituents GWT-2 Ground-water trace constituents

M-144 Major constituents GWM-2 Ground-water major constituents

N-55 Nutrient constituents AMW-4 Acid mine water constituents

N-56 Nutrient constituents Hg-25 Mercury

P-29 Low ionic strength constituents

The USGS requested that analytical results be returned by October 31, 1997 for evaluation and 

preparation of this report. Laboratories that are providing analytical services to USGS offices are requested to 

analyze the appropriate SRSs for the same analytes requested by the USGS offices. All laboratories are requested 

to include the analytical methods used to determine the concentration of each analyte. When analytical-method 

information was provided, it has been included in tables 14-22.
Table 1 .-Laboratory participants in the analyses of standard reference samples distributed in September 1997

City Participating Laboratory

Alabama

Arizona

Arkansas

California

Colorado

Delaware 

Florida

Georgia

Hawaii 

Idaho

Illinois

Tuscaloosa

Yuma

Arkadelphia

Fayetteville

Little Rock

Davis

Los Angeles

Menlo Park

Oakland

Sacramento

San Diego

Santa Fe Springs

Tahoe City

West Sacramento

Alamosa

Arvada

Arvada

Aurora

Boulder

Colorado Springs

Denver

Denver

Denver

Denver

Denver

Denver

Fort Collins

Fort Collins

Golden

Greeley

Lakewood

Loveland

Westminster

Wheat Ridge

Dover

Bradenton

Brooksville

Ocala

Orlando

Palatka

Tallahassee

Tallahassee

Tallahassee

Tampa

West Palm Beach

Athens

Atlanta

Atlanta

Stone Mountain

Tifton

Honolulu

Boise

Pocatello

Champaign

Geological Survey of Alabama

Burns and Roe Services Corporation

Ouachita Baptist University, Department of Biology

University of Arkansas, Arkansas Water Resources Center

Arkansas Department of Pollution Control and Ecology

University of California, Davis, Division of Environmental Studies

Metropolitan Water District, Water Quality Laboratory

U.S. Geological Survey, Branch of Regional Research, Western Region

East Bay Municipal Utility District

Anlab

U.S. Geological Survey, Water Resources Division

West Coast Analytical Service, Inc.

Tahoe Research Group

Quanterra Environmental Services

Bureau of Reclamation

Quanterra Environmental Services

U.S. Geological Survey, National Water Quality Laboratory

Core Laboratories, Inc.

U.S. Geological Survey, Branch of Regional Research, Central Region

City of Colorado Springs, Environmental Quality Laboratory

U.S. Geological Survey, Water Resources Division, Acid Rain Global Climate

Bureau of Reclamation

Denver Water Department

Metro Wastewater Reclamation

U.S.Geological Survey, Earth Science Investment Program

U.S. Geological Survey, Colorado District, Upper Arkansas Toxic Project

City of Fort Collins - Water Quality

U.S. Department of Agriculture, Forest Service

Huffman Laboratories

Central Colorado Water Conservatory District

U.S. Environmental Protection Agency

Northern Colorado Water Conservation

City of Westminster, Semper Water Treatment Plant

ACTLABS, Inc.

Delaware Department of Natural Resources

Manatee County Environmental Management Department

Southwest Florida Water Management District

U.S. Geological Survey Water Resources Division, Quality Water Service Unit

Post, Bucklye, Schuh, and Jernigan, Inc.

St. John's River Water Management District

City of Tallahassee, Water Quality Division

Florida Department of Environmental Protection

Savannah Laboratories and Environmental Services

Hillsborough County Environmental Protection Commission

South Florida Water Management District

University of Georgia

Georgia Department of Natural Resources, Environmental Protection Division

U.S. Geological Survey, Water Resources Division

Dekalb County Public Works Department

U.S. Department of Agriculture, Agricultural Research Service

University of Hawaii, SOEST Analytical Services

U.S. Bureau of Reclamation, Pacific Northwest Regional Lab

Idaho State University, Department of Chemistry

Illinois Department of Natural Resources, Waste Management and Research Center
Table 1-Laboratory participants in the analyses of standard reference samples distributed in September 1997 

-continued

State

Illinois

Iowa

Kansas

Kentucky

Michigan

Minnesota

Missouri

Montana

Nebraska

Nevada

New York

North Carolina

North Dakota

Ohio

Oklahoma

Oregon

Citv

Champaign

Des Moines

Lawrence

Topeka

Wichita

Frankfort

Lexington

Detroit

Minneapolis

St. Paul

St. Paul

Columbia

Jefferson City

Butte

Helena

Jefferson City

Missoula

McCook

Las Vegas

Reno

Reno

Reno

Sparks

Brewster

Buffalo

Grahamsville

Hauppauge

Hempstead

Milbrook

North Babylon

Rochester

Shokan

Syracuse

Syracuse

Troy

Valhalla

Wantagh

Yorktown

Chapel Hill

Charlotte

Durham

Bismarck

Bismarck

Bismarck

Cincinnati

Cuyahoga Heights

Tiffin

Wooster

Norman

Oklahoma City

Corvallis

Corvallis

Hillsboro

Participating Laboratory

Illinois Environmental Protection Agency

University of Iowa Hygienic Laboratory, Des Moines Branch

Kansas Geological Survey

City of Topeka, Water Pollution Control Division

City of Wichita, Water and Sewer Department

Kentucky State University, Division of Environmental Studies

Kentucky Geological Survey

Detroit Water and Sewerage Department, Analytical Laboratory

University of Minnesota, Department of Geology and Geophysics

Metropolitan Council Environmental Services

University of Minnesota, Department of Soil Science

University of Missouri

Missouri Department of Health

Montana Bureau of Mines & Geology

State of Montana, Laboratory Services Bureau

Montana Tunnels Laboratory

University of Montana, Department of Geology

Olsen Laboratory

University of Nevada, Las Vegas, Harry Reid Center for Environmental Studies

Desert Research Institute

Nevada State Health Laboratory

Reno-Sparks Wastewater Treatment, Truckee Meadows Reclamation Facility

American Assay Laboratories Environmental

New York City Department of Environmental Protection, Brewster Laboratory

Erie County Public Health Laboratory

New York City Department of Environmental Protection, Grahamsville Laboratory

Suffolk County Water Authority Laboratory

Nassau County Department of Health

Institute of Ecosystem Studies

EcoTest Laboratories

Monroe County Department of Health

New York City Department of Environmental Protection, Ben Nessin Laboratory

Onondaga County Department of Drainage and Sanitation

State University of New York, College of Environmental Science and Forestry

U.S. Geological Survey, Water Resources Division

New York City Department of Environmental Protection, Kensico Laboratory

Cedar Creek Special Projects Laboratory

New York City Department of Environmental Protection, Croton Gatehouse Lab

City of Durham Water Resources Department

Mecklenburg County Department of Environmental Protection

Duke University, Duke Wetland Center

North Dakota Department of Health, East Laboratory

North Dakota State Water Commission

U.S. Bureau of Reclamation

U.S. Environmental Protection Agency

Northeast Ohio Regional Sewer District

Heidelberg College

Ohio State University, Ohio Agricultural Research and Developmental Center

Oklahoma Geological Survey

Oklahoma Department of Environmental Quality

U.S. Department of Agriculture, Agricultural Research Service

U.S. Department of Agriculture, Forestry Services Laboratory

Unified Sewerage Agency of Washington County
Table 1. -Laboratory participants in the analyses of standard reference samples distributed in September 1997 

-continued 

State______City____________Participating Laboratory

Pennsylvania

Puerto Rico

South Carolina

South Dakota

Tennessee

Texas

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming

Harrisburg

Somerset

San Juan

Cayce

Columbia

Brookings

Knoxville

Austin

College Station

College Station

Laredo

Waterbury

Chesapeake

Manassas

Richmond

Seattle

Morgantown

Madison

Madison

Middleton

Milwaukee

Laramie

Pennsylvania Department of Environmental Protection, Bureau of Laboratories

Geochemical Testing, Energy Center, Inc.

Department of Natural Resources

Shealy Environmental Services, Inc.

Columbia Analytical Laboratories

Northern Great Plains Water Resources Research Center

University of Tennessee, Department of Forestry, Wildlife, and Fisheries

Lower Colorado River Authority, Environmental Laboratories Services

Texas A & M, Department of Oceanography

Intermountain Labs

City of Laredo

Vermont Agency of Natural Resources, Department of Environmental Conservation

City of Chesapeake, Department of Public Utilities

Occoquan Watershed Monitoring Laboratory

Commonwealth of Virginia, Division of Consolidated Laboratory Services

Brooks-Rand, Ltd., Environmental Research and Development

West Virginia University, National Research Center for Coal and Energy

University of Wisconsin, Wisconsin State Laboratory of Hygiene

Madison Department of Public Health

U.S.Geological Survey, Wisconsin District Mercury Laboratory

Milwaukee Metropolitan Sewerage District

Wyoming Department of Agriculture

European Laboratory

Location Participating Laboratory 

Norway Oslo Norwegian Institute for Water Research

Middle East Laboratories

Location Participating Laboratory

Israel Geological Survey of Israel Laboratory

Mekeroth Water Company, Ashqelon Laboratory

Mekeroth Water Company, Central Laboratory

Mekeroth Water Company, Dan Sewage Treatment Plant

Mekeroth Water Company, Eylat Laboratory

Mekeroth Water Company, Lake Kinneret Laboratory

Mekeroth Water Company, Rosh Ha'ayn Laboratory

Water Resources Research Center, Institute for Desert Research

Jordan Royal Scientific Society of Jordan, Environmental Research Center Laboratory

Water Authority of Jordan, Central Laboratory

West Bank Al-Quds University, College of Science and Technology, Water Research Center
PREPARATION OF STANDARD REFERENCE SAMPLES

All of the SRSs used in this evaluation were prepared by USGS personnel located in Lakewood, Colorado, and 

were analyzed for analyte concentrations and physical property values prior to mailing. A library of these SRSs 

is maintained and can be requested by participating laboratories and USGS offices for use in their quality-control 

programs.

Trace constituents sample T-151 was prepared using water collected from the South Platte River near Lake 

George, Colorado. The water was pumped through 0.45-, 0.2-, and 0.1-micron (^im) filters, in series, into a 1200- 

liter (L) polypropylene drum. The water was continuously circulated and passed through a 0.1-^im filter and 

ultraviolet sterilizer for 24 hours. Following this circulation, the water was acidified to pH 1.3 with nitric acid 

and chlorinated to 5 parts per million (ppm) free chlorine with sodium hypochlorite. The trace constituent 

concentrations were adjusted by adding reagent grade chemicals. The sample was circulated an additional 24 

hours prior to bottling. During bottling, the sample was pumped through an ultraviolet sterilizer and a 0.1- ^im 

filter. The polypropylene and fluorinated ethylene propylene bottles used were acid leached, deionized-water 

rinsed, and autoclave sterilized.

Major constituents sample M-144 was prepared using water collected from the Colorado River near Loma, 

Colorado. The water was pumped through 0.45- 0.2- and 0.1 -|im filters, in series, into a 1200-L polypropylene 

drum. The water was chlorinated to 5-ppm free chlorine with sodium hypochlorite, continuously circulated, and 

passed through a 0.1 -|im filter and ultraviolet sterilizer for 24 hours prior to bottling. During bottling, the sample 

was pumped through an ultraviolet sterilizer and a 0.1-^im filter. The polypropylene bottles used were acid 

leached, deionized-water rinsed, and autoclave sterilized.

Nutrient constituents sample N-55 was prepared using deionized water. These samples were prepared the week 

prior to the mailing for this SRS evaluation. The water was pumped through 0.45-, 0.2-, and 0.1-^im filters, in 

series, into a 25-L polypropylene drum and continuously circulated and passed through a 0.1-jam filter for 24 

hours. The desired nutrient concentrations were obtained by adding reagent-grade chemicals. The sample was 

continuously circulated for 24 hours prior to being bottled. The 30-milliliter (mL) glass vials used were new, 

amber, acid leached, deionized-water rinsed, and autoclave sterilized.

Nutrient constituents sample N-56 was prepared using water collected from the Fall River near Idaho Springs, 

Colorado. These samples were prepared the week prior to the mailing for this SRS evaluation. The water was 

pumped through 0.45- 0.2- and 0.1-^im filters, in series, into a 200-L polypropylene drum and continuously 

circulated and passed through a 0.1-jam filter for 24 hours. The desired nutrient concentrations were obtained by 

adding reagent-grade chemicals. The sample was continuously circulated for 24 hours prior to being bottled. The 

250-mL polyethylene bottles used were new, amber, acid leached, deionized-water rinsed, and autoclave 

sterilized.

Low ionic strength constituents sample P-29 was prepared in a 400-L polypropylene drum using water collected 

from the Fall River near Idaho Springs, Colorado. The water was pumped into the drum through 0.45- 0.2- and 

0.1 -|im filters in series. Desired phosphate and fluoride concentrations were obtained by adding reagent-grade 

chemicals. Prior to bottling, the sample was continuously mixed for 24 hours while being circulated through a 

0.1 -urn filter and an ultraviolet sterilizer. During bottling the sample was pumped through an ultraviolet sterilizer 

and a 0.1-^im filter. The 500-mL polypropylene bottles used were acid leached, deionized-water rinsed, and 

autoclave sterilized.
Ground-water trace constituents sample GWT-2 was prepared using water collected from a monitoring well 

completed in alluvial deposits and located in Adams County, Colorado. The water was pumped through 0.45-, 

0.2-, and 0.1-urn filters, in series, into a 600-L polypropylene drum. The water was chlorinated to 5-ppm free 

chlorine with sodium hypochlorite. During bottling the sample was pumped through an ultraviolet sterilizer and a 

0.1-um filter. The 500-mL polypropylene bottles used were acid leached, deionized-water rinsed, and autoclave 

sterilized.

Ground-water major constituents sample GWM-2 was prepared using water collected from a monitoring well 

completed in alluvial deposits and located in Adams County, Colorado. The water was pumped through 0.45-, 

0.2-, and 0.1-um filters, in series, into a 600-L polypropylene drum. The water was acidified to a pH of about 

1.0 with nitric acid. During bottling the sample was pumped through an ultraviolet sterilizer and a 0.1-um filter. 

The 500-mL polypropylene bottles used were acid leached, deionized-water rinsed, and autoclave sterilized.

Acid mine water constituents sample AMW-4 was prepared using water collected from drainage from a mine 

located in Idaho Springs, Colorado. The water was pumped through 0.45-, 0.2-, and 0.1-um filters, in series, into 

a 200-L polypropylene drum. The water was acidified to a pH of about 1.0 with nitric acid. During bottling the 

sample was pumped through an ultraviolet sterilizer and a 0.1-um filter. The 250-mL polyethylene bottles used 

were acid leached, and deionized-water rinsed.

Mercury sample Hg-25 was prepared using water collected from the Fall River near Idaho Springs, Colorado. 

The sample was prepared in a 200-L polypropylene drum. The river water was pumped into this drum through 

0.45-, 0.2-, and 0.1-urn filters in series. The water was continuously circulated and passed through a 0.1-um filter 

and ultraviolet sterilizer for 48 hours. Nitric acid (5-percent, by volume) and dichromate compound (0.05- 

percent, by weight) were added to stabilize the sample. The desired mercury concentration was obtained by 

adding a mercury standard solution. Following an additional 24 hours of circulation, the sample was bottled. The 

250-mL glass bottles and tetrafluoroethylene fluorocarbon resin caps used were new, acid leached, and 

deionized-water rinsed.
LABORATORY ANALYSES

The participating laboratories were asked to determine constituents that are summarized in table 2. The number 

of analytes varied from 28 in T-151(trace constituents) to 1 in Hg-25 (mercury).

Table 2. -Constituents determined in standard reference samples distributed in September 1997

(mq/L. milligrams per liter: ug/L. micrograms per liter: uS/cm, microsiemens per centimeter at 25 degrees Celsius)

Constituent or property

Acidity 

Alk 

Ag

Al 

As

B

Ba

Be

Ca 

Cd

Cl

Co

Cr

Cu

DSRD

F

Fe

Hg

K

Li

Mg

Mn

Mo

Na 

NH3 asN

NH3+Org N as N 

Ni

NO3+NO2 as N 

Pb

oH

PO4 asP 

total P as P

Sb

Se

SiO2

S04 

Sp Cond

Sr

Tl

U

V 

Zn

Acidity as CaCO3 

Alkalinity as CaCO3 

Silver

Aluminum 

Arsenic

Boron

Barium

Beryllium

Calcium 

Cadmium

Chloride

Cobalt

Chromium

Copper

Dissolved solids

Fluoride

Iron

Mercury

Potassium

Lithium

Magnesium

Manganese

Molybdenum

Sodium 

Ammonia

Ammonia + Organic N 

Nickel

Nitrate + Nitrite 

Lead

Orthophosphate 

Phosphorus

Antimony

Selenium

Silica

Sulfate 

Specific conductance

Strontium

Thallium

Uranium

Vanadium 

Zinc

Units

mg/L 

mg/L 

Hg/L

Hg/L 

u£/L

Hg/L

Hg/L

Hg/L

mg/L 

ua/L

mg/L

Hg/L

jig/L

Hg/L

mg/L

mg/L

Hg/L

Hg/L

mg/L

u2/L

mg/L

Hg/L

(ig/L

mg/L 

mg/L

mg/L

mg/L

unit

mg/L 

mg/L

(ig/L

Hg/L

Hg/L

mg/L 

nS/cm

Hg/L

Hg/L

Hg/L

Hg/L 

ue/L

T-151 M-144 N-55. N-56 P-29 GWT-2

X 

X

X 

X

X X

X

X

X X 

X

X

X

X

X

X

X

X

X X

X

X X

X

X

X X 

X

X 

X

X 

X

X

X 

X X

X

X

X X

X 

X

X X

X

X

X X 

X

X 

X

X 

X

X

X

X

X X 

X

X

X

X

X

X

X

X X

X

X X

X

X

X X

X

X

X

X

X

X

X

X 

X

X

X 

X

GWM-2 AMW-4 Ha-25

X 

X

X 

X

X X

X

X

X X 

X

X

X

X

X

X

X

X

X

X X

X

X X

X

X

X X

X

X

X

X

X

X X

X 

X

X

X 

X
Laboratories were requested to identify the method used for each constituent according to table 3 analytical 

method codes.

Table 3. Analytical method codes

Code_____Method____________________________________________________

0 Other

1 Atomic absorption: direct, air

2 Atomic absorption: direct, nitrous oxide

3 Atomic absorption: graphite furnace

4 Inductively coupled plasma

5 Direct current plasma

6 Inductively coupled plasma/mass spectrometry

7 Ion chromatography

8 Atomic absorption: cold vapor

9 Atomic fluoresence

10 Atomic absorption: extraction [specify chelating agents ]

11 Atomic absorption: hydride [specify reducing agent ]

12 Flame emission

20 Titration: colorimetric [specify color reagent ]

21 Titration: electrometric [specify reducing or oxidizing agent/color reagent ]

22 Colorimetric: [specify reducing or oxidizing agent/color reagent ]

40 Ion selective electrode

41 Electrometric \pH and specific conductance}

50 Gravimetric: [specify filtration, evaporation,and so forth]

51_______Turbidimctric________________________________________________

Participating laboratories were also asked to identify the method used, such as those references listed next, 

to further define the methods.

1. American Public Health Association, American Water Works Association, and Water Environment 

Federation, 1995, Standard methods for the examination of water and wastewater (19th ed.): 

Washington, D.C., American Public Health Association, variable pagination.

2. American Society for Testing and Materials, 1995, Annual book of ASTM standards: 

Philadelphia, v. 11.0, and v. 11.02.

3. Kopp, J.F., and McKee, G.F., 1979, Methods for chemical analysis of water and wastes:

Cincinnati, U.S. Environmental Protection Agency, EPA 600/4-79-020, rev. 1983, 

460 p.

4. Fishman, M.J., and Friedman, L.C., eds., 1989. Methods for determination of inorganic 

substances in water and fluvial sediments (3rd ed.): U.S. Geological Survey 

Techniques of Water-Resources Investigations, Book 5, Chapter Al, 545 p.

5. Miscellaneous manufacturer's instrument manuals or references.
LABORATORY PERFORMANCE RATINGS

To facilitate laboratory intercomparison, laboratory performance ratings, based on the analyses reported for each 

SRS, are included in tables 4 through 13 in this report. For each SRS, averages of all the analyte ratings and the 

number of analyte values reported are given for each participating laboratory. In some cases, laboratory reported 

values in tables 4-13 may have been reformatted in terms of significant figures to meet publication criteria. For 

example, a reported value of 15 may have been changed to 15.0 or a value of 102.86 may have been changed to 

102.9 in these tables. However, the actual reported values by all the laboratories were used to calculate the 

statistical results and performance ratings presented in the report.

Laboratory performance for each analyte is rated on a scale 4 to 0, based on the absolute Z-value, as listed below:

Rating_______________________Absolute Z-value_____

4 (Excellent) 0.00 to 0.50

3 (Good) 0.51 to 1.00

2 (Satisfactory) 1.01 to 1.50

1 (Marginal) 1.51 to 2.00

0 (Unsatisfactory)________________Greater than 2.00_____

Overall laboratory performance ratings greater than 2.4 are considered satisfactory. Ratings between 2.0 and 

2.39 are considered marginal and those less than 2.0 are considered unsatisfactory. Ratings are based on the 

relative performance of laboratories on specific samples and should be reviewed and evaluated on a case-bycase basis for each laboratory considering such factors as methods used and data needs of specific USGS 

projects using the laboratory data.

STATISTICAL PRESENTATION OF DATA

Data in this report have been evaluated using nonparametric statistics as described by Hoaglin and others 

(1983). This statistical approach is a resistant statistic because the median is not influenced by outliers as is the 

mean in traditional statistics. Analytical data for each analyte are presented in tabular and graphical forms in 

tables 14 through 22. Tabulated data for each analyte include the laboratory code number; reported values; 

analytical method; most probable value (MPV); number of reported analyses, excluding less than values (N); 

data range; Z-value; and the F-pseudosigma. The Z-value is equivalent to the Z-score of traditional statistics, 

being the number of deviations the reported value is from the MPV. The F-pseudosigma is equivalent to the 

standard deviation (a) of traditional statistics when the data has a Gaussian distribution. If an analyte has a 

sufficient number of analyses by a given method, usually 7, the F-pseudosigma for that analytical method is 

reported in the block of data listed for each analyte.

The median value is considered the MPV. The median (midpoint) divides the ordered data into halves and is 

designated the MPV. The hinges include the middle 50-percent of the data and are the mid-values of the upper 

and lower halves of the data. The hinges are similar to quartiles, but are not mathematically equivalent. The 

range of data between the upper hinge (Hu) and the lower hinge (HI) and the hinge spread (H-spr), is used to 

calculate the F-pseudosigma, the laboratory performance rating, the upper warning level (UWL), lower warning 

level (LWL), the upper control level (UCL) and the lower control level (LCL). The F-pseudosigma is calculated 

by comparison of the H-spr value to the Gaussian distribution relation; 67.45 percent of the data "hinges" 

between plus and minus la, resulting in a H-spr of 2 x 0.6745 = 1.349a. This relation allows the calculation of 

the F-pseudosigma = (H-spr)/1.349. Laboratories reporting "less than" values are not performance rated unless 

their reported "less than" values are greater than two Z-values from the MPV.

10
The graphical plot of the reported data is shown in figure 1. The upper and lower boundaries of the graphical 

plots generally are +3 and -3 F-pseudosigma deviations from the median. Computer-program scaling constraints 

do not permit these boundaries to always be graphed at exactly these values as shown in the graphical plot. 

Reported values are grouped by analytical method in ascending order of value. Lines designate the MPV, Hu, 

HI, and the UWL and LWL at +2 and -2 F-pseudosigma, respectively. "Less than" values are not plotted.

In some cases, if the F-pseudosigma is less than five percent of the MPV, the rating criterion is five percent of 

the MPV. All rating criterion values are denoted in the statistical summary tables by double asterisks (**).

The term "insufficient data" is included in some of the tables and is used when the number of analyses is less 

than 7 or the calculated F-pseudosigma is greater than the MPV.

10

NOTE: vertical scale is the concentration value of the individual analyte in appropriate units (see table 2.) 

Horizontal scale is the laboratory reported values separated by method (different symbols) and plotted by 

increasing values. Numbers next to each symbol at the bottom of the figure are analytical method codes that are 

described in table 3.

Figure 1 .-Statistical parameters shown on reported-data graphs in tables 14-22

REFERENCE

Hoaglin, D.C., Mosteller, F., and Tukey, J.W., eds., 1983, Understanding robust and 

exploratory data analysis: New York, NY, John Wiley, Inc., p. 38-41.

11
Table 4. Overall laboratory performance ratings for standard reference samples distributed in September 1997

(SRS, standard reference sample; Lab, laboratory number; OWR, overall weighted rating for all sample types; OLR, overall laboratory rating for reported values of a sample type; 

V/130, number of reported values of 130 total possible values from all sample types; V/28,V/16,V/5,V/5,V/11,V/26,V13 and V/26 are number of reported 

values possible forT-151, M-144, N-55, N-56, P-29, GWT-2, GWM-2 and AMW-4 respectively; NR, not rated.)

Lab

1 

2 

3 

4 

5

8 

9 

10 

11 

12

13 

15 

16 

18 

19

21 

22 

23 

24 

25

26 

30.1 

30.2 

32 

33

34.1 

34.2 

38 

39 

40

42 

43 

45 

46 

48

51 

53 

57 

59 

64

68 

69 

70 

76 

83

84 

85 

86 

87 

88

89 

90 

91 

96 

97

100 

102 

105 

107 

109

110 

113 

114 

118 

119

121 

126 

127 

134 

136

138 

140 

141.1 

141.2 

142

SRS =

OWR

3.5 

2.9 

2.6 

1.7 

2.9

2.4 

3.4 

3.5 

2.7 

2.0

3.0 

3.1 

2.7 

2.8 

3.0

3.2 

4.0 

2.5 

2.3 

1.7

3.3 

2.7 

2.2 

2.8 

2.5

2.6 

2.0 

3.3 

2.9 

2.5

2.3 

3.5 

3.0 

3.2 

2.1

3.1 

1.5 

1.9 

3.0 

3.6

2.6 

2.9 

3.0 

3.4 

3.1

2.5 

3.1 

3.0 

2.5 

0.3

2.7 

3.7 

2.9 

2.9 

2.9

2.6 

2.1 

3.0 

2.9 

3.1

3.7 

2.9 

2.0 

2.5 

3.0

3.1 

1.7 

2.9 

3.5 

1.2

3.6 

2.7 

1.6 

1.3 

2.7

V/130

120 

9 

52 

38 

106

101 

10 

30 

96 

37

66 

15 

105 

83 

28

6 

2 

45 

78 

97

77 

85 

14 

61 

51

14 

1 

27 

51 

32

65 

39 

2 

101 

107

20 

4 

18 

96 

35

45 

64 

38 

22 

55

17 

68 

78 

37 

6

102 

6 

7 

30 

45

101 

70 

91 

44 

14

13 

10 

4 

17 

75

29 

11 

73 

122 

61

91 

87 

100 

6 

86

T-151

OLR

x:-3y7xx

: ' : '2:.4x: x 

0.9 

2.9

:x2.6xx

x-3.2 ;:x 

3>4 

2,0

3-Qx

2.6 

3.2

 X-2-.4XX3.0

;;-2,i': ' :"

3J 

1:8

3.7 x 

3.0 

2;0 

3.3 

1:3

-:x:2,0;xx

2.9 

2.6

3.0 

3.7

MY'.

 X2x&x:

3.8:

3.2

X-3-4X-X

2.8 

2.0 

3.3 

3,0 

3:3

2.7 

2.7

:x3;3:-x 

2.1

:xT.7xx

X^-QX1.8 

2.6

2.4 

1.6 

3.2

;.2>2 : x

xx3.5:-x

4.0

3.1

3.3 

IY& ' 3:3' 

:::3:7XY 

1:1

3.7 

2.5 Ti 

2.7

V/28

: : x-25:: X;

XX23XX 

17 

22

:::^x-, 

;xx6" v-'

20

Y.Y. ;4XYX

 ;x46x:

24 

18

10

X.Y.TX

10 

16 

15

x-x22x- 

,V.23Xxxx3x-x

23

w

 ::: x-3.x: x

20 

19

16 " ' ' 6\"

18 

21

x-x-4x:

18 x-xs'-x24 

12

XY.1&X

5 

14 . .-.-. 3 . . V '1T" 

;:xi3';x-

.Y.14.Y.;

x::17x:- 

XYX^::-:-. 

8 

21

xx:22:-x 

21 

20

.;.Y.1.6Y,

X-X-4YX-

::: !:: : 

20 -::.-«"'

Y.Y.5.Y..

23 

25 

18

22 

15 

19

23

M-144

OLR

3.6 

3.1 

3.1

2.8

3.6 

2.4 

2.9

3.3 

3.0 

2.7 

2.4 

3.4

2.5 

3.4 

2.1

3.5 

2.5 

3.3 

2.5 

2.9

2.5

3.2 

2.8 

2.3

2.9 

4.0

3.4 

2.2

2.8

2.1 

2.9 

3.9

2.5 

3.2 

2.7 

3.8 

3.2

3.6 

3.5 

2.8 

2.8

3.2

3.4 

3.1

2.6 

2.0 

2.8 

2.9

3.2 

3.2

3.6

3.2 

3.7 

1.0

3.8 

2.8 

1.5 

1.3 

3.1

V/16

15 

15

13

15

13 

14

7

12 

14 

14 

14 

10

6 

13 

14

12 

8 

3 

14 

11

2

9 

12 

13

7 

10

14 

12

10

13 

11 

10

13 

10 

13 

4 

10

9 

15 

12 

12

13

7 

13

14 

10 

12 

11

6 

12

5

15 

15

7

15 

12 

13 

3 

15

N-55

OLR

3.0

,;W'

.-X-3.6.-XY 

3:8 

x: : ;2.6; xx 

1.8

X-X33XX-

::2.2: ' : ' v 

3.0

3.2 

4.0 

1.8

3.0

4.0

' ' ' HAx-:2,S;XY

1.0

3.0 

3.5 

1.6

3.4 

2.0 

1.6 

4.0

4.0

3:0 

4:0

O.Q

 |.g-X-.

2.6 

0.7

3.8 

3.7 

2.7 - X2.6X-X 

3,6

3.4 

2:8

x: 3:8-::x:

3.0 

2.8 

3,5 

2.6

3.2

x-:3;4xx

3.8 %£ -

.V22V.;.

2.8

V/5

-:-x 5x:-x

' 3',.

x-xSx-x5 

:'x : :5x: x: 4

 :x4'-x: 

xx5X'-x

''::': 4"':.

...g ...

Y.YTXX ".'.4.';: 

'."4..

i

5

xx:4:x

1

V ' V T"' 

XY.4:x:

5

5

 X--2 : : : 

5

x: x5xx-

.Y..1Y.Y. xx-4 '

X: X :1;.YX

2

 xx 4 x: 

xx:5:xx ";.-3.;,.. ::: $- - 

XX3XX 

3 

XX5-X

5

x,5xx4

: :x4x: :x

1

xx.sx-x-

;,,2X... x-xgx-x

5

 - -5- ' 

5

--5xx:

 ..&,,

5

N-56

OLR

3.2 

1.2 

2.7

3.2 

3.6 

2.8 

2.4

2.8 

2.6 

3.8

4.0 

3.4

0.8

2.0 

4.0

3.0 

2.8

0.0

3.0 

2.4 

2.0

1.0 

3.6

4.0 

3.6 

4.0

0.7

1.8 

2.4 

0.0

3.6 

3.7 

3.0 

3.4 

3.8

3.0 

2.8 

3.8

3.0 

0.5 

1.4

3.0 

3.2

3.0 

3.2

2.4

V/5

5 

5 

3

5 

5 

5 

5

4 

5 

4

1 

5

4

2 

1

5 

4

1

1 

5 

5

2 

5

1 

5 

1

3

4 

5 

3

5 

3 

3 

5 

5

5 

4 

4

5 

2 

5

5 

5

5 

5

5

P-29

-OLR;

3.7

-'2Jxx: 

3.0

2.4

3-1

-x-Mx: 

3.1

2.5

Y^YJX:

3.7 x

M

3.4 

3.7

1.0

' V 3.t'x 

xxt.lxx:

 X-^g-XX 

3.5

3.8

3.8

3-2 

4:0

2.3

1.7 

3:4

3.9

 x:1.9xx:

3:7 

4:0

3.4 

2:8 

3.3

GWT-2 ;V/H;

io :-x-,9 ::- 

8

9

10

10

 x-x?.x:

8

xx:-3x-x

10

o

8 

10

4

xx-:8-x-: 

x: x-9,: :x

10

::::&:;:

:xx-6x:-

 ' '-5,,^-

Y,,1,1....

' ' '' '' 4 ''''''

6

,-::,6-.-:.

x-Y8v-'-

.. YJB.:..

x: :x9 

10

: xx3XY

8

 .-X--QXX

::1:1x

OLR

3.4 

3.0

2.1

2.5 

2.3

2.8

2.7 

2.9

2.5 

2.8 

1.2

3.2 

2.3 

0.7 

2.6 

1.4

3.3

2.4 

3.0

3.2 

2.2

2.9 

2.8

2.8

3.7 

2.6

2.2 

3.2

2.1

2.4 

1.8 

3.0

2.5

3.1

2.7 

1.7

3.2 

1.2

3.6 

2.5 

1.3

2.7

V/26

24 

23

21

17 

4

17

22 

20

10 

17

19

23 

21 

3 

23

11

3

16

7

19 

21

18 

5

13

6 

15

14

15

19

22 

20 

20

6

20

9 

6

24 

17

22 

15 

18

24

GWM-2

OLR

3,5

 : ;2:7:x

1-9

3.0

-xTSxx

3.0

2.8 

2.6

;"3.4'"

:xx1:5::' : -

.-..-3.4Y.-. 

1.8

: x: :3.Q;X: :

;x;3.3-;;:

Y.: .2;.0.:x:

1.8 

3.7

"3.2^ 

:1:8

3.0 

3.6 x

2.1 " 3.4"'

: -M::

2.8

3.7 

2.9

 x: 3,3Xx

2.4::: 

3:0

: Y:3:5 x:

3:2

,-,.3.5xx 

1:0

3A 

3.0 

1X8 

1.3 

2.5

V/13

13 

11

:M.:-

13

YX-:e:x:

12

12 ;;;8';;

1t 

13

11 "X6-"'

:;;X:IYX

XXX7YX

:-x.-2x-x-:

..Y.'S.Y.Y. XXgX-- 

13

-.-..12Y,.-

10

: : : : » : : : 

7

X-X-g-X' 

......... 

IO:

;v'13'::

:;;;^;x

xx^2xY

12

;;;;9;;;'

:x:-: 8: : x

-W--

13

-., 5,..-.

13 "IT" 

xxi2x--- 

3 

13

AMW-4

OLR

3.3

2.2 

3.2

2.3

1.9

1.8

3.0 

3.0

1.5

3.2 

2.5

3.0

1.8 

2.9

3.7 

2.1

3.2

3.1

3.5 

3.1

2.8

3.1 

3.3

2.4 

3.5 

0.8

2.7 

1.3

V/26

22

21 

22

22

21 

6

22 

22

21

22 

4

3

15 

7

19 

21

18

17

15 

14

19

24 

24

24 

24 

10

15 

21

Hf)-25

OLft

,-,-4,,, 

x-x-4-x-:-

x-x-l-x-x

 X;X-2X:X:

v;.4;;;; XYXOXX--

,Y.4-.Y, 

Y.Y 4-Y,.

xx-4 : : 

_;;;o;;;;

xxY4:-x

o

: : : . 2x-x

';;;.?...

YXX°X-:-X

Y-.-.-O-.-.-.-.- 

2 

xx:-1 :x: 

x-xl'x-x

xx:-2:-xx: .,,4,.-..

:-:-x-0:-:-x'

x-x-O-x-x-

' ^ ' 

.Y.Y.4.Y.;.

: ::^F

..Y.3..Y.

0

 XY::OX:X

XX4-X: X 

X-X-3-.XX

'"''.'4'"

4

x::-3-:-Y. 

 - 3'

:x-.4 : : : 

xx : 2: x: x:

v-v4;;-"

12
Table 4. Overall laboratory performance ratings for standard reference samples distributed in September 1997' Continued

(SRS, standard reference sample; Lab, laboratory number; OWR, overall weighted rating for all sample types; OLR, overall laboratory rating for reported values of a sample type; 

V/130, number of reported values of 130 total possible values from all sample types; V/28,V/16.V/5,V/5,V/11,V/26, V13 and V/26 are number of reported 

values possible forT-151, M-144, N-55, N-56, P-29, GWT-2, GWM-2 and AMW-4 respectively; NR, not rated.)

SRS =

Lab

143 

145 

146 

147 

149

151 

154 

158 

180 

185

190 

191 

193 

196 

200

203 

204 

205 

208 

209

212 

213 

215 

217 

218

220 

221 

224 

227 

228

230 

234 

235 

236 

237

241 

243 

244 

246 

247

248 

253 

254 

255 

256

257 

259 

263 

264 

265

266 

267 

268 

269 

270

273 

283 

284 

285 

286

287 

289 

290 

291 

292

294 

297 

298 

300 

302

OWR

3.3 

2.3 

2.8 

3.5 

2.5

3.2 

2.3 

2.5 

2.8 

1.9

2.8 

3.1 

2.6 

2.9 

2.3

2.8 

2.9 

2.3 

3.1 

1.5

2.8 

3.2 

2.1 

2.9 

0.7

2.3 

2.9 

3.3 

1.2 

2.3

2.4 

3.4 

2.7 

2.8 

2.2

2.3 

3.5 

3.8 

2.8 

2.7

1.3 

1.8 

3.4 

2.9 

2.2

1.8 

3.7 

2.8 

3.2 

3.5

3.3 

3.3 

2.1 

3.4 

3.0

2.6 

2.0 

1.3 

1.8 

2.0

1.4 

4.0 

1.5 

0.0 

2.5

2.6 

1.8 

4.0 

1.0 

1.3

V/130

8 

85 

88 

28 

44

52 

36 

41 

76 

8

42 

54 

14 

30 

3

34 

71 

4 

9 

20

87 

15 

109 

37 

21

61 

66 

22 

10 

9

7 

86 

49 

72 

45

104 

11 

5 

89 

107

4 

23 

58 

66 

24

28 

29 

10 

11 

36

12 

6 

27 

7 

5

32 

109 

111 

10 

8

56 

5 

10 

2 

65

28 

56 

1 

32 

3

T-151

OLR

2.1 

3.0 

3.8

,,,3-5.;.;.;

2-8

 X-2.7V--

2.9

Y-2.5.v:

3.0 

2.9

0,8

3,6

1.8 

3.0 

0.0

1.7 

3.2

3.6 

3.3 

2:6

::-1-,5;x:

2.5

1,3 

3:1 

3.2 

2,0

1.3 

3.8

3.5

 x'Mx-:-

2.5 

2X4 

1-1

1,6 

2.1

!£

V/28

21

22 

10

18

13 

16

12 

16 

12 ".'.*..

8 

16

16 - -: :# 

21 

18

XX-7XX

17 

15

25 

13 

22 

17

19

19 

23

13 

19 

14

16 

14

18

19 

22 

22

12 

16

X-X-yX-X

M-144

OLR

3.2 

2.3 

2.4 

2.5

3.5 

2.4 

2.3 

2.8

2.7 

3.6

2.8

3.1 

3.2

3.5 

0.8

3.0 

4.0 

1.6 

2.6 

1.0

2.7 

3.0 

3.3

2.4 

3.7 

1.5 

3.1 

4.0

2.5 

4.0 

4.0 

3.0 

2.3

2.2 

3.9 

3.3 

2.4

2.5 

3.7 

2.8 

3.2 

3.7

3.3 

3.3 

2.1 

3.4 

3.0

2.7 

1.6 

1.5

2.0

1.7 

2.8

3.4 

3.0

V/1 6

13 

12 

5 

12

8 

14 

12 

12

13 

9

10

11 

11

2 

5

12 

4 

14 

13 

8

9 

9 

7

7 

15 

4 

15 

2

13 

3 

3 

11 

14

6 

7 

11 

10

12 

15 

10 

11 

10

12 

6 

9 

7 

5

13 

15 

13

8

10 

12

8 

9

N-55

OLR

2.5 

2.6 

3.2

3.6 

18

3.2 

3,0

2.8 

4.0 

2.0

4.0 

2:0

1,8 

4:0 

2.0

14

YX2-O.YX

3.0

3.4

1-3 

2.3

1.6 

2.0

0,0

1:8 

0.0 

2.8

1.5

V/5

:x4xxx 

5

 5V - V

xx- 4x:x

.;.;.;.5.;.;.,

..-.-.5..-..

2

 -YJJ.Y'

5

,.' 2Y.Y 

Y.-.2XY.'

2

4

2 -..

 XX 4XX5 

5

4

5 

3

:::-4:::-

: x- 5

2 

5

"'..4.'.'.'.'

N-56

OLR

4.0 

1.4 

3.2

2.8 

2.4 

2.0

3.4 

3.0

3.5

3.0 

3.6 

2.5 

3.0 

2.0

1.6 

3.0 

2.8 

3.0

2.2 

2.8 

0.4

2.5

2.2 

2.7

2.3

1.4 

1.6

0.0 

4.0 

1.2 

0.0 

1.8

2.3 

0.2

1.3

V/5

4 

5 

5

4 

5 

4

5 

2

2

4 

5 

2 

2 

2

5 

2 

5 

5

5 

5 

5

4

5 

3

4

5 

5

2 

5 

5 

1

4

4 

5

3

P-29

OLR

1.8 

1.4

:: 1'.4y;

1.9 

3,0

2.0 

2.9

2.0

2.9

2,5

^3.6^ 

2.3

3.0

2.5 

4,0 

3,5

3;3

1.7

:^3 :

1.3 

0.9

1,1

3.2

GWT-2

V/11

XX-6X-X 

5

 XYB x

Y.Y7 '

10

7

9

6

.'.'V.

9X

8

10

x-x2xx ""2 '

10

:: 7 ::

11

....7...

5

XX8X;XOLR

1.7 

2.8

2.6

2.6 

2.4

2.7 

2.8

2.3

2.6

1.9

2.1 

2.8

3.2 

3.0 

2.8

1.9

2.7 

3.0

3.2 

2.8

1.9 

1.2

1.2 

2.4

2.1 

1.2

V/26

22

15

11

18

19

17 

4

16

17 

21

19 

15

24 

15 

22

19

21 

23

16 

18

23 

22

13 

17

7 

23

GWM-2

OLR V/13

3.3 12 

2.0 11

3.7 7

3.3 3

:-::3J};::::x:ii: : : x :

:x-:M:Y : x : x: »: : : x-:

:: 2.8X; XXX10YX

3.2 12 

1.5 13 

1.0 6

3.0 9

XX3.1XXX Q ' 

3:6 13 

2.0 3 

3.0 13

2.7 12 

3:0 16

X;X2:9;.;XXX12Y

3.3 7 

M ^

1.5 13

1,8 10

x: :3.0'x; x: x: :iix: 2.3 7 

1.7 9

06 9

AMW-4 Hg-25

OLR V/26 OLR

33 19 ....._. 4

1.9 10 3

,....2...

-xxx4,:x-

 2 

2.5 20 3 4 

2.6 22 4

,4...

..Y4...Y.

4

2.3 13 X X3 

2.3 18

2.1 21

2.7 22 

3.1 24 4

1.0 6 ; 

3.8 15 

0

27 24 0 

17 23 0

1-2 10 3

304 3.3 19

13
Table 5. Laboratory performance ratings for standard reference sample T-151 (trace constituents)

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/28, number of reported values of 28 possible values; RV, reported value; <, less than.)

F-p

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte = 

MPV =

seudosigma =

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Ag (Silver)

xx:-j.;1:ixxxxx:

xxx-::1,Ox::Vx:

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Al (Aluminum) As 

itg/L insuff data

, ,,,,, ,. ,,,,

Absolute Z-value 

1.51 -2.00 

greater than 2. 00

(Arsenic)

L01 tig/L

B (Boron) Ba (Barium) 

36.3 ng/L : x x 4&7: x : x |ig/i_ x

Be (Beryllium) 

X 25.6 H9/L 

1.6

Ga (Calcium)

Lab OLR V/28 RV Rating RV Rating RV x::::Rating RV Rating RV Rating RV Rating Rv Rating

1

3

4

5

8

10

11

12

13

16

18

19

21

23

24

25

26

30.1

30.2

32

33

34

39

40

42

43

46

48

51

59

64

68

69

70

76

83

84

85

86

87

89

91

96

97

100

102

105

107

110

118

119

121

126

127

134

136

138

140

141

142

3.7

2.4

0.9

2.9

2.6

3.2

3.4

2.0

3.0

2.6

3.2

2.4

3.0

2.1

3.1

1.8

3.7

3.0

2.0

3.3

1.3

2.0

2.9

2.6

3.0

3.7

3.2

2.5

3.8

3.2

3.4

2.8

2.0

3.3

3.0

3.3

2.7

2.7

3.3

2.1

1.7

3.0

1.8

2.6

2.4

1.6

3.2

2.2

3.5

4.0

3.1

3.3

1.6

3.3

3.7

1.1

3.7

2.5

1.1

2.7

25

23

17

22

19

6

20

4

16

24

18

10

1 V

10

16

15

22

23

3

23

10

3

20

19

16

6

18

21

4

18

5

24

12

15

5

14

3

11

13

14

17

1

8

21

22

21

20

16

4

1

20

15

5

23

25

18

22

15

19

23

11V6

yXylS'.dxxXy

;XXXXg :Q:XX-X:

: : :. 1-M: : : :::

VxViq>8;x x xx

15.0:

'''.VT2,4^;V.V

V:V:V: : 9:5''-; - v''- : VX^-G: : :X: : : :

,,,i;.1: ;9,Xy,x

: : : : : : <-&x;:-X'

10x9

:11:0

11.4

V: ::- : 1: lV4VVxV:

10.0

1:1.6

xx:VtO;&:-:v::x

: : : ::v:g- Q: : 

,:y,::i.d'6:XyXy

x:xio:7 :: ::

idV4

x: x:x8,4::x:x:'

...,,1.1.7,,,;.;:

;;xi2.0...VV.

X 10.3

11,6

::x:12,7:;:;:,

8.3

xV: ii;4xxx:x

' : :< 'I-,,..,,:

xx ;1'i;8"''^';

:xxxl:2.9x:x: :V

9,8

. .xx-tiaxxxv

10.CL

11:6

10,7: x

: : xi:ixfx: x: x'

md ' '12:3^'..

::10:8

3

V::xx:1x: :V

,:xxx 0x:x

XyyySXy:

x-xx-4---

-,:xxo;xx

.V.V.V2...

vXXX^XX''

x:x:x:4x-:: :

:xxx3;::

xxxxo-xx.

,,,,,,4.v.,

'Vv 4v.v

.. :x4;:;:

xV:V:: 4:x: x

xxx:2xx:

^^3^'

XXXX3'XX

 2""

VxxV3V:x'

xV-X4: x' x

 g----

- x- :xOx: x

-,,: : , 3.,::.

'."..'$ .'.:

xVVVS;:::

3

...xxxlxxx

0

:x;x;:4:V ::

vXxVPVV:

V.V.V.g-

:xV ::-i:Vx

2

 ,,,,X4:;X

::." 2

: : x : x : a xx

x:xx-:4: xV:

: x: xx'4XX

2 :-: 

v.v.v.2.'..

xxx:4X'X6.30

< 30

< 30

< 50

6.30

13.40

<100

<50

<19

4.19

<10

7.00

65.00

88.00

< 10

16.00

6.70

20.50

<50

<100

<100

18.10

9.75

17.00

5.00

<10

13.50

5.60

<30

3.63

749.00

7.44

<100

<50

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

1,60

<f0

1.37

 xo;70

xxxxx<:2x; xx

x: xx:<:-5;xx;

1.30

<1

XvX-^iQ,:::

<50

xV' : -;o.72xxV:

1.30 X

: xx:<:0^xx:x

o;eo

1,18

, 130 xx

0,50

0.80

-x:x.l:.:95xxx

^'<.5^. ; x: : :x: '<;ia: ' : -'-'' :

x::-X'-< 2 -

x: x; :;x<2.:::,.

XXXX<1-'XX

'.//:/:'< 2 :.: :.

<15

xxx:: <-4:;>:; x

,.v'-'v<5.,..,

.... .-..< 2,,..,,

....v.<.2v.v.v

0,43

44.40

 ^ v<2,,--.-

<50

1.02

....V.2...-.V

NR

 '- ' '-3-.-.V/ X-XXX3 - - - - 

NR

NR

. "..$ "...

NR

NR

NR

.yXvX-gXXX

Xvxxx3 vx

NR

 'xxx:-.-2 : :- 

".'.'..4.'.'.'..

Y.V.vSvV

 . -.-.- --. 

3

:xxxxOx: xx

NR

NR

NR

NR

NR

NR

NR

xNR

NR

NR

NR .: :: 2-.-..:-

xxx'xPx:/

NR

NR

4

36.4

41.0

32.0

38.0

28.0

35.5

151.0

<50

38.0

<23

34.9

36.0

38.0

41.0

26.6

39.2

29.6

39.0

56.7

<100

40.0

34.8

120.0

<50

33.0

36.3

54.0

38.8

46.6

<50

4

2

3

4

1

4

0

NR

4

0

4

4

4

2

0

3

2

3

0

NR

3

4

0

NR

3

4

0

3

0

NR

40,8

41.0

 : : : x>'35>ix; x: x :

:x:v.4l:8:xxx

38,0

X384.0;;;;;

XXX41:2v:'Xv

 : : 4lx4; x: :x:-

39,0

4d:o

<10Q :xx-42;3"-:-- x--

: 40.7: x '':':' Ai. 2 :'."'':

40:0

41.0

45.4

41,0 V

::x:: 39: 2vx:x

41;3

:x: : ' :y39.7'-: : x: ;

:;:v38.0. ::x

:-XvX42.8-x: : : x:

39:o

<5Q

x : :x:42;2::v ' x

vXy39:6XXX.

:x36;o

:xx4i:;&xxx:

36.8

<50

<i;oo

48:8

:::: - 42;»: :::::

39.0 XXX'^VQXXX-'

xx; .49.3xx:x:

40,0;

40.0

xx : :39;3: :xxx

 ,-,:4i:;3,v;:;

49.6

x:xx:41X8Xx x: :

55;0

36:7 :.

40J X

 :xxxx4-xx: "'""4'-..

;XXXX0-XXX

: :xx:: x3:;>::> '.'..'.V.'.I.'.....

Xv.-xxo .-: : 

:x:x:x-4xxx-

 xxxx.4-.xx-.

.-,.., ,,3,.-,,.-

.-.-.-,.-,.4 x-x-:

NR .-.-.y.v.; 3-..-..-

xx: : ;V4Vx-x

V '-".V.4'.V.V

Vx: :-::X4x x x

-;;' '" 4V '

0

.'".'.'.".'4^'

: :xxx3-x

; xVxV:4:Vx:

.y.y.y.-g.v.v.

-x:-x-x1:-x-x

xx:-:V:-2v:xV.

-x-x-x-:3-x-xx

NR ::-: -x-:3x---x-:

-. x-:-: : : : :3x':Vx : XvX' x '0::x ' v

xVV.xsVxx:

... 0:;;;;-

NR

NR

 xx-:0xxx:

x.xV:: '2xV:

,.,,.3,-, xx:x-4------

V:V:VVOVxx

x: 4 : : 

-.-,.- . . 4...,;:;

: :: -:VxV3xxx

... ..v4. : ..v,

vv;x'ov;;"

x:VVx3: x: x:

..-.-.-..-. Oxx:

o

XXX: X4X: X

25.5

26.0

18.3

26.0

27.0

25.4

27.0

28.4

25.0

23.7

27.1

25.0

28.0

25.0

24.8

27.8

26.2

24.0

24.5

25.1

23.9

25.7

25.2

25.0

25.6

22.3

23.0

25.8

27.4

23.0

29.0

24.7

25.0

25.6

25.9

22.9

23.8

4

4

0

4

3

4

3

1

4

2

3

4

1

4

4

2

4

3

3

4

2

4

4

4

4

0

1

4

2

1

0

3

4

4

4

1

2

37,9

40:0 40:0 X' '::'.

xxx38: 8xxxx:

38,3 x

x : x: :38;3x:x:

''''':':Wj.. ".".'.

38.0

x: ' : - : x35,4:-:xxx

.V.y.;.37.3.:::. : .y

x:x:x3"6:0 : xV: :x ' ' ' ' ' ' 37x4':.'.'.'..

xx 40:6

x:,.x37,2-:-;:;:;

33X0 ;XyX--37;Q: xV:: x

37.5X X

.4.0,2......

,x:x,,35.;8:.;:vV

.V.V.V36.6.y.y.V

 ,:x:-37::9xxxx

"37;7V-V.V.

:y:y40:4x:-xx:

 .,,,38,6.;.;:;:;

36X5

xV:38;4-;:;:;:;:;:

38.6

x:x:3e;:3 xxxX: X: X38:6V:: XyX

36.7

:.xxx36,OvXy::

,,,.V.3'.5V.9x,,,,, 'XX''37:4'V':V

Xy,,.38;8X; XyX

44,6 ;

37.7 X 'X'x38,6;'x ":

:x:x:-:36.0xx:x:

37,0: XXX37.4-----'--

,xV:y38/1: : x:V:V

38,0

: - ::xV37:4x: x::: : 38,1

' : x' XV37,6'vxx

36.1 X '"'"''M.2.'"'".

xx ;:;37jj>:::;:-

xxxx33:0,.,:;:

38:1

:x:-,v4

xx:x:x1VxVx ' ' " "i.V.V.

xV:xV3X: :V: : xxxV4xxv,

xxx:4----xx

'^^4'.'''^'

xVxv4x ' x: x

xxx:x1 xxx:

 '-' v4v,,.

: :Vx : :V2-:;:;.;

......4.,..

.y.y.y:1 ,,,,,,

xx:x::4xxx, ''"VJT!"

xx:x:3xx:-xXXX : 4;.; :;' 

...... ,1,,,,

 x-:Vx2:::: x-

 ' -' 3.'vV.

XXX-:4X;.;:

'......4.... XyX-^x-xx:

xx,.x:3x: :x:-. j ' 

xxx:.4x: ' ' ' ' 3..,,,,

,.y,,,2-,,,-

V:::: : : :3.:: xV':

x:xxx3' v- v- xV:V : 2': :Vx--

 x:x-.2: .V.V ' ' ' '-' ' 4xx

x: x: :V3Vx

,,,,,,.O,:x,

:xxx-4:;:. -' '3'""

XX-X-SXXX'

 ,,,,, :3,,,,,,

 -,,,,,4',,,,,

x : :Vx: 4: xV:: ' :

 4.:::.

:Vxx4xV:x:

'^'V4^...

:x:: 4xxx

 ,,-,,.2X--. """4V.V.

:VVVx3xx:x

v...v.OvXv , .,-,, 

14
Table 5. Laboratory performance ratings for standard reference sample T-151 (trace constituents)--Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter, Lab, laboratory number; OLR, 

V/28, number of reported values of 28 possible values; RV, reported value; <, less than.)

overall laboratory rating for all reported values;

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Analyte = Ag:(Silver) 

MPV= ill >g/L

Al (Aluminum) 

insuff data

F-pseudosigma = : x x x 1 xOx : x :

Lab

145

146

147

149

151

154

158

180

190

191

193

196

203

204

209

212

213

215

217

218

220

221

234

235

236

237

241

246

247

253

254

255

256

257

259

265

268

273

283

284

287

292

297

304

OLR

2.1

3.0

3.8

2.9

3.5

2.2

2.8

2.7

2.9

3.3

2.5

2.5

3.0

2.9

0.8

3.6

2.3

1.8

3.0

0.0

1.7

3.2

3.6

3.3

2.6

1.5

2.2

2.6

2.5

1.3

3.1

3.2

2.0

1.3

3.8

3.5

2.1

2.5

2.4

1.1

1.6

2.1

2.1

3.6

V/28

21

15 ;

22

10

18 X

22

13

16

12

16

12

4

8

16

4

16

6

21

18

7

17

15

25

13

22

17

19

19

23

3

13

19

14

16

14

26

18

19

22

22

12

16 :

7

19

RV

: xxi3:3xx:

11x0 x

x: xii:i:x:::

x:xl:l:2: x::: 11,3

x: x1.0,2,xx:-

X 11X0

xxx,9,4.x: x

13^0

10:9

10:8

:-: : 10>8xx:

ill

x xiO;Q

10,4

x:xl3:2:x;x:

11,9

11.3

XX g;s

:::: 6.0

11,6

11.2

10,0 X

11.2

:1Q.O

: 13.0 x

; 13:0

il.5

Rating

xxxx; x0xxx:

....... :,.4: xxx

x:xxx :4:;: :: x:

-xxxxx4xx."

,,,,,,.;4XXX

x:xx. 3x:

 .,,,- 4... -

,x:x: x : lx;x

 ' v.- .....I-,.-,,

: :-: : : 4 '

' ' ' ' ' 4 ".'.'

:xxxx:4xxx:

....... .,4 . ,.

xxx:x2x:xx

.'....'?.'.. .

: x; xxx:0'Xxx-

,,,.; V.V3.V.;,..

XXXX:x4 .,;;-;. ' ' ' 'x.'.'i..'.."

x-x-x-xq";'-'-'

vxxx-xsxx:

4.

: xxx:: x2 x:; x

^..,,4 XX.

: ,.v,v,.2 ,v,

: xxxvx;ixx:x

: x: x : x-xtx.--.

4

RV

67.00

<200

6.50

6.00

45.50

6.19

5.00

6.66

<100

<50

<100

170.00

7.67

8.64

6.90

23.00

142.00

8.70

<35

7.60

<20

<34

16.88

5.04

6.20

5.00

6.60

8.00

15.00

7.70

<100

6.80

Rating

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

As (Arsenic) 

1:01 x :.':-: jig/L

0,39

RV

14X00; """< 10

0.85

0,77

1:27

<40.1

0;73

1.07

<5

1.42

,.,,XX<-5..,.

x ; x :;x.< 5 -.x

 XX5-2--.-.X

;-x x< i:x

1.00

0,87

X 1.10X

...V.<35,.v.

vxx;x<::5,xx

<65

:: x : xx<2::::

< .11.0,,. 

 xxxx:<:2v '-x

X2:45

0.66

1.00

< 10

.x,:x.<x5:-:;: .;

1.00

-.,., ,.< 3....

0:78

Rating

v.X'-Xv.O X-X

NR

 X.X-XX4-X-X

. ....3.'.... . -.,- ,. 3..-,.-.

NR

: :-:;:- x3xx-x

xxxx:4,::;:

NR

xxx x- 2 

NR

NR

NR

NR

:,xxxx4xxx

4

x : x: x;x-4;,x.:

NR

NR

NR

NR

NR

NR

xxxx: 0xxx:

.,.. . ,..3..,.-..

..... 4....

NR

 ,.-... .-.-.-.-.. NR

NR

x : xxx:3v:x;

B (Boron) 

36.3

4.6

RV

34.0

34.0

36.2

30.0

51.6

<100

30.0

<100

36.0

36.4

33.0

44.0

36.7

37.6

30.0

38.3

27.2

36.0

35.7

40.0

30.1

20.0

Ba (Barium) Be (Beryllium) Ca (Calcium) 

ng/L :40:7 jig/L 25.6 ng/L 37:9 mg/L

Rating

4

4

4

2

o

NR

2

NR

4

4

3

1

4

4

2

4

1

4

4

3

2

0

.,v,1,7xxx

RV

42.0

407

40.0 i

40:0

40,0

35.5

43^0

X 4l8 X

:40:7

37.7

40.0 X

4o:o

41-4

41.0

40:8

39.0

 38.0;

47:0

62:0

xx42:4x: x:

43,4

42.2

39:1

40,1 xx

40.0

X 46,0

38.9

40:0;

34.0

4l:Q :;

39.8

Rating

 X x3

::,xxx4x: x. '".'.'. 4.V.V.

x : xxxv4x:'x

xxx-:x.4-.-,x

o

xx:x,x. 2vxxx:xx:: :3:x:

xxxx:X4 :: x :

,..,,,,,.l.xx

X;XXXX4XvX--

 ' '- '-' ' ' 4 A ' ' ' 

A

 : : : -//.A ' -

 % 

xxxx::1xx:

,,,,,,,.Qxxx-

...V,..,,g,..V.-

x : x: : :x-.3x:x: :

....... 1.'.,.-.

xxxxxS-xx,. "'""v'3 .'.'

,,,,.,,4. . 4

x : xx:-xb;:xx

..:::::%:::.. xx.'x:x4'. v '.

: ,; ,xx o-;:-:

: : : x: xxx4: xx

3

1.6

RV

27.0

26.0

26.0

27.5

23.9

26.0

24.9

23.7

26.Q

25.1

25.0

25.5

27.2

24.8

28.0

26.0

32.0

6.2

26.7

29.4

25.3

26.0

21.0

26.7

36.0

23.0

27.1

Rating

3

4

4

2

2

4

4

2

4

4

4

4

2

4

1

4

0

0

3

0 X

4 x

4

0

3

0

1

3

x xx: 14x: x: RV

.3.8,4.

X :36;4

36:0

36.9

X36.3X

420

38:1

36.6

:36,6x

41.2 : 35.5 

: X: X36:4X: X:

64.4

36.9

35.2

"36,2

42.0

.::: 37 :&. '. ' '.

35:5

38;0

39.3: x

36;2 v

XX38:3X

39:7;x

37.5

XX.38;,3X;X

37.1

38:4

"33'..3'y

38.4

39.0

: x; : ; :37:4:: x: 39,1

46.1

x38,0;::

41.7

380

x 38.0: x:

Rating

" 4

xxx:xx-2;X:x

, :: :Xv.2X.X. '""" '3"

,x: x-x: x2x: ::x:

.'.V.'.V.'.'.O.'.v..'

:xv.x:v4'-v - '

" ... 3

,,,,XX..3"

. v . v ,,,Q.v;.v

.-.-,,,,,,2-.,,,.

:x::xx';2-xxv

. : : :' 0,xx,

........ .3. ...

x-x::x::1:xx: - .'.y.'.y.y.'2y.'.

:xxx:x:ov

x:x-.xx4:xx-

' ! ..

 x-x-x:-:^.'.'-.'.

x:-:xxx:2-XvX;

'.y.y.y.V2. v...

 . . . ,. 4

,,X-XXX2,XXX

...'... 4, ...

: X: X: X: X: 4::::y

3

:xx-x-v4xx:v

.'.V.'.'.V.: .i?,,,,,.

 x-x-xx-4-:x : x

'" '"'''''.3

XX^^XX'^-X^'

.........3 .:,

XXXXX-QXX

; x: x : ,xx4x;x: x

,.., . . . Q.v.v. xxxxx.^. 1 . 

XXXXX-.4X-XX

15
Table 5. Laboratory performance ratings for standard reference sample T-151 (trace constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/28, number of reported values of 28 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte = Cd (Cadmium) 

MPV = ^tt£^:j$L.^ 

F-pseudosigma = i ,6

Lab RV Rating

1 x26;6 x x 4 

3 25.8 3

5 : 26:O x x 3x 

8 27.0 4

10 26.5 4 

11 ,...,26y1., ,,.... ....... ,.4,;,.;, 

12 26.8 4

13 xxx25.8x: x: ;xx: x- 3:: xx 

16 26.0 3

18 26.0 3

19 24:O X X x 1 21 """' "'"'' '''' .'"'.. V^"'. 

23 xxx:24.0 : xx:: xxx : xi;::" :: 

24 26.8 4

25 25.0 ... 2x...

26 '' '' ^ 2&,5-/-'-- - ' 2-.-- : 

30.1 x 27.0 x :4 

30.2 Z'^.^r^Y..^'. 

32 27X0 4

33 vXXXv.XX-XXXXXXXXXXX 

34 29.0 2

39 ' '24!0 1

40 25.8 3 

42 28.1 : 3

43 XXX : X :XY x:xx-xx:xx- xxx----

Afi *?fi *} 4 

48 26X0 3

51 ^.:->;:X :: X: ;;XYX: : :: ;: ;XXX::-

59 27.5 4

64

68 X 27.0 X x4 X 

69 22.5 0 

70 X 26 5 4

76 xx-xx-x-x-x-xxx-x-x-x-x-;;;;-

83 26.9 4

84 : : : ' ' ' -- -- - 

85 :XX.YXX:XXXXXXXXX:X 

86 28.0 3 

87 X X29.0 : 2

89 30.8 Ox 91 - ;;;;; ;;;;. 

96 -"-: 25.2 -:-" 2 

97 : 26:Ox x x 3x 

100 32.4 0

102 25:0 2 

105 27.0 4

107 26 j 4

110 .;;;;xxx: x : ;;;;x;;;x- :: : : ; : :

118

119 2.7,1"" 4

121 X26:8 X 4 

126 29.1 Y 2 x 

127 28.9 2 

134 26,4 XXX 4 x

136 24.6 2

138 27.0 4 

140 26.0 XX 3

141 25.0 x:x 2;X 

142 28.2 3

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Co (Cobalt) 

insuff data

RV

<5 

<3

<5 

0.46

<5

<6 

0.10

<2

0.10

0.20 

<50

«,,

<5 

0.40

< 1 

< 1

0.08 

0.11

<6

8.30 

0.20

< 1

Rating

NR 

NR

NR 

NR

NR 

NR

NR

NR 

NR 

NR

NR

NR

NR

NR 

NR

NR

NR 

NR

NR 

NR

NR 

NR

NR 

NR

NR 

NR

NR 

NR

Rating 

1 (Marginel) 

0 (Unsatisfactory) 

NR (Not Rated)

Cr (Chromium) 

30,1 ^g/L

RV Rating

x;29:8 x : X 4 

32.0 3

23.0 Q;^

... V 27;0xx:xxxx:-2xxx:

31:9 3

 ;xx:29.7x;;xxxxx : ' :4x: xx

29.0 X 4

28.0 3 

28-4 3

31.0 4

'31,1 ;';;;:; 4 ;;. 

x 33:0 2 :x

30.0 4

24.1 0

XYX^Q-X-'-X-XY-' 2 ' "

29.3 4

- - 2Q3--- - 4 

29:0 4

 XXX28:6-XXX: X : X : -3x

29:2 4

XXX29;.1 XXXXXXX4XXX 

.....32.6... .... .2...

xxx28..9-XYXXxx:3xx

X 30.0 X X 4

.x:x:27,9-xxxYYX 3.xx 

44.0 0

32.0 X 3

XY:31,9xx:-.xxxx3 xxx

24.0 0

; xx29,o:vxxxxxx4:: xx 

30,9 4

28,3 3

29.4 4

X29.o - - ";4;;

29;7x 4 

34:0 1

30.3 4

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Cu (Copper) 

33.0 ng/L 

2.5

RV

32.7 

33.0 

22.0 

34.3 

31.0

35.0 

34.3 

32.0 

36.8 

33.7

32.0 

28.0

31.2 

35.7

33.0 

33.2 

34.0

33.0

37.0 

32.2 

30.0

34.3 

29.0

34.2

38.3 

<50 

35.7 

36.9

33.7

38.0 

33.5 

34.0

31.2

34.2 

35.2 

31.9

28.0 

31.0 

36.0

33.0 

31.2 

38.0 

32.3 

33.9

45.3 

33.6 

33.0 

29.5 

33.3

Rating

4 

4 

0 

4 

3

3 

4 

3 

2 

4

3 

0

3 

3

4 

4 

4

4

2 

4 

2

4 

1

4

1 

NR 

3 

2

4

1 

4 

4

3

4 

3 

3

0 

3 

2

4 

3 

1 

4 

4

0 

4 

4 

1 

4

Fe (Iron) 

10.0 

4.4

RV

7.5

80:0

9:7

<2Q

<20

8^8 :-: : :-:

<50

14.Q 

<500

.;.;.;.;.;.;.;< Q

175:0

< 500

0.0

13.0

11.6

 . x^p.;.;;;:

xxxt8:4xxx

<4Q

<50

xxx<:20xxx: 

 '-..< .50.'^,,.^ " "'" 8.2"--' v -

8.0

: ;<20'v ' x

20:0

14.0 

x<:50 

. .-. Vg.Q 

11.0 - -. . 

24.4

8.0

::;:< :50 :::::

xxx- x:-: .X K

Rating

XXX 3XX

Ox 

:NR

NR

NR

NR

Y,.-.',3.YY.-

NR

NR <

;;.;.3.'.v.v .x- 0xx:- 

NR

0

NR

. - -4 .Y.Y.

NR 

NR

: : :::-:-1 :-,:-:- 

NR 

NR

NR 

NR

NR x-.-.x4xxxNR

4 

NR

-x-xxO-xx-.-

NR

:.-.xx4xxx: ".'.'.'.A.'.'.'.

;, ...YQX - 

 x-x-. ;3x :-.-..- 

.'.'.'. 4.. V.V 

NR 

NR

(Potassium) 

1.95 mg/L 

0.13

RV

1.87 

1.99 

2.20 

1.42 

2.00

1.65

1.98 

2.20

1.97 

1.76

2.07 

1.71

1.93 

2.00

2.00 

1.84

2.00 

2.00 

2.23 

1.94 

2.20

2.05 

2.02 

2.09 

2.01

1.90

1.84 

1.95 

1.59

1.82

1.88 

1.78

1.90 

1.72 

2.55 

1.82

2.00

2.12 

1.91

1.85 

1.94 

1.73 

1.78

Rating

3 

4 

1 

0 

4

0

4 

1

4 

2

3 

1

NR

4

4

4 

3

4 

4 

0 

4 

1

3 

3 

2 

3

4

3 

4 

0

3

3 

2

4 

1 

0 

3

4

2

4

3 

4 

1 

2

Li (Lithium) 

x X27.6 x: ng/L :

,...,;. 2;!v,.... ,-, . ..

RV

28,8

X10:0

16.1-;;

26.4 

X <20

;x2";;

319 x

30:0

27.5 

25.0

28.0

27:6

^27.1 ".'.'.. 

<50

28.0

<50

X 23,4 X 

25,3

28.6 ;

Rating

xx :x:3 : : :

 XY.-XYO....XY

xxVxOx:" 

x;;xx:3; : xx:

.-.XXX;.O :XY,.

;; ; :: ;4 ;:::;

x: x: xx:2:;;;x

...: . :. : . : . :4.: ;.;.;.;.

'. 4-xx

.'.'...2..Y..

xxxx-4,xx'-

'".'.'. 4 

NR

NR

 xx:::i.:-x: x

..;.;.; v.2.;.;.;.;.

x ; .xxx4;;xx

16
Table 5. Laboratory performance ratings for standard reference sample T-151 (trace constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/28, number of reported values of 28 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte= Cd (Cadmium) 

MPV = 26.8 iig/L 

F-pseudosigma = 1,P : x

Lab RV Rating

145 29.0 2

146 27.0 X 4 

147 27,0 y:;;4 

149 29.0 2

151 :x:y28xOv:: : : : : : : : ; : ; :::v3:: :': : x:

154 25.7 X X 3xx 158 V ' V ' V ""'V '"'V"V';^ "',. -' 

180 : 29-6x: 1 

190 26:6 4 x 

191 26:3 4

193 y;25.0y ; ; ; 2X X

196 ; ; ' ' ;; ;; "'.,,,,,.,,,,...,,..,

204 25.3 ::: 3 x

209 ; ;

212 X 27.0 4

215 23.0 "".'.'.' P. '.'.'. 

217 : 26.4 X 4

218 :xxxxxx:x:xx:: xxx: x: x:::

220 31.0 0

221 26:4 4 

234....,x28,5,yy-y.yyy:2yXyX 

235 26.2 4 

236 26,0 : X :3;

237 31.0 0 

241 :28;.0 3 

246 :26:8 XX X 4:

247 29 J .'.'.'. V 1 

253 313.0 0

254 3(>,0 ° 

255 27:1 4 

256 ;25:6; 3

257 : 29.0::: 2 

259 27,8 3

265 27.2 4 

268 ;X 29:OyX ; 2 X 

273 27.5 4 

283 26/5 4

284 X31.0X :0 X

287 .....3erp......,,,,,-Pyyy. 

292 : : ; x: x23.;2':: : ' ::;: '0"- v 

297 :xyx:xxxxvxxxvxxx:xxxx 

304 27.1 4

Absolute Z-value 

0.00 - 0.50 

0.51-1.00 

1.01-1.50

Co (Cobalt) 

insuff data

RV

4.00

2.00 

3.90 

<5.22

0.10

<0.7 

<5

1.00 

0.50

<6

<6

<5 

23.20 

1.97 

0.51

<0.5 

<20 

5.08 

0.10 

<100

0.08

Rating

NR 

NR

NR 

NR 

NR

NR

NR 

NR 

NR 

NR

NR 

NR

NR

NR

NR 

NR

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Cr (Chromium) 

30.1 ng/L

RV Rating

XXXX38r Oy:yyyyy: 0 

31.0 4

37:0 XX X 0

"29.9- ....'.'.'.'.'.'.'4.'.'.

33.9 1 

28.8 3 

27.4 x x :2x x

30,2 4

29.0 4:

x : :x29.8y : ' y ' v ' :::v'4 ' ' '

32.P x 3

46.0 0

....v31: .5.-v.v-..v.v3yyy 

30.7 4 

x-::x29:0-.x-xxxx: 4;vx:: 

28.0 3

yy-y-32.0' ' ' ' ' ' ' ' '3 ' - 

4,0 0 

33.5 1

 x :x'31,8xx:: 'x:; x': 3x-x30,0 4 

29:9 4

31,0 4

3'32.o;'^..y^3^ '

 XyX26.6X:XX-XXXX1: :XXv 

-y-;-y30,;8-;-y.yyy;.;-;4y.yX

30.0 4

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Cu (Copper) 

33.0 ng/L 

2.5

RV

44.0 

36.4 

32.0 

34.0 

33.0

30.5 

37.0 

33.6 

34.2 

28.5

<50

38.0 

31.0

31.0 

34.8 

29.0 

32.5

43.1 

34.7 

32.2 

32.8 

33.0

45.0 

29.5 

34.3 

34.8 

36.9

34.0 

34.1 

30.0 

29.0 

33.0

32.0 

37.0 

21.0 

26.8 

44.0

41.0 

29.0

32.4

Rating

0 

2 

3 

4 

4

2 

2

4 

4 

1

NR

1 

3

3 

3 

1 

4

0 

3 

4 

4 

4

0 

1 

4 

3 

2

4 

4 

2

1 

4

3 

2

0 

0 

0

0

1

4

Fe (Iron) 

xiO.O 

4,4

RV

x :e.O 

<50 

<40

....... 5.5. ..

<:3.33 

17,2 

<50

xxx<:: lOxxx 

<0.02

<100 

137,0

10:0 

<ioo

50.0 1'1','P'x.. 

:12:8 

8.6 xx

<50

-.-.yX^.pv.XX

12:0 ;

xx -: : : < .8- : -:-:-: 

<14.2

39.9

13.0 

10.0 

x<50 ":-: :-:

10.0 

: 35,0

K

Rating

3 

NR 

NR

y.y.y.2-y.y.

...2.:,. 

NR 

NR

NR

-.,.-.0,xx

NR

...p..,..,

NR

4

: x : x: : : 3x:xx:

yy.y,4y.yy;.

 X-X:4X: X::

NR 

NR

NR 

NR

:x: x: P' ; : : x : :

xxx:4x:xx

4 

NR

NR

....4...... 

NR

(Potassium) 

1 .95 mg/L 

0.13

RV

1.92 

2.08

1.90

2.50 

2.00 

1.56

1.98

1.88 

1.87 

2.13 

1.96 

7.43

<5

< 1 

<5 

2.30

3.80 

1.94 

1.95

1.93

1.70 

2.09 

2.25

1.80 

2.00 

1.48

1.88

1.88 

2.00 

2.00 

1.73 

1.06

3.00 

1.90 

1.98 

1.90

Rating

4 

2

4

0 

4 

0

4

3 

3 

2 

4 

0

NR

0 

NR

0

0 

4 

4

4

1 

2 

0

2

4 

0

3

3 

4 

4 

1 

0

0 

4 

4 

4

Li (Lithium) 

27;6

RV

31,0

:-: ::-: 27iP.yv y.:.

^m£

xx- 24;oxx:x----

X: Xy29-OX;X;XX

X 28.0 :

30,0 

29:b

26.0 x: 

XXX-28L3 : XyX:

Rating

1

X;X4XyX

ma

vX;4:xxx'

y.y.3-.;.;-;-;-

-xx4x:xx

Xy.lyXy.

2

;:4y.y..

:xx4x: xx

 ,,.'.3,,,,.. : 3 -- 

x:4 : : .-.

17
Table 5. Laboratory performance ratings for standard reference sample T-151 (trace constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/28, number of reported values of 28 possible values; RV, reported value; <, less than

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Analyte = Mg (Magnesium) Mn (Manganese) Mp (Molybdenum) Na (Sodium) Ni (Nickel) Pb (Lead) Sb (Antimony) 

MPV =: 17:5: mg/L 13.0 ng/L 29,6 |ig/L 55.0 mg/L : 10:0 : jig/L 19.8 ng/L 26.8 jig/L 

F-pseudosigma = :: 0:6 ::: : 1.1 1 g 1 6 i.7 2.3 2:0: :: :

Lab

1 

3 

4 

5 

8

10 

11 

12 

13 

16

18 

19 

21 

23 

24

25 

26 

30.1 

30.2 

32

33 

34 

39 

40 

42

43 

46 

48 

51 

59

64 

68 

69 

70 

76

83 

84 

85 

86 

87

89 

91 

96 

97 

100

102 

105 

107 

110 

118

119 

121 

126 

127 

134

136 

138 

140 

141 

142

RV

17,5 

18:7: 

18,9 

17.7 

17:7

 17.5

17,4 

18:0 : 16.0 x 

17.3

17.0 : : : 

17/9

18.6 

1:7,9 

18.0 

18:0 

18.6

17.8

 17.5 

16:2

17.4

: : : : : :i7v4x: '

19:1

17,6 

17.3

:17:.0 xx: 18.2 

17-2 

17.9 

17.5

xl7:3:x 

16.9: 

17.2 x 

 18,3 -: : 

i'6.'9 : : : 

17.9

17:4

18.5

19.0 

17.0 

X16.9 

17,2

>v:17;.3;.v: ; : 1: 7-6

17:5

...1:7,7:::

16.4

17:6 

10:8' 16.9 ,: :-: 

::18.7 x

Rating

4

xxxxxoxxx: 

0 

::: ' 4 -" '

:x,,:xx4xxx

'--'- ' '' 4- ' ' 

 :. 4 

xxxxx3:x:: x :

-.v.-.v-Oxxx. : :':^'4':;'

,v;.;.;.;.:.;3v. .;: '.'.'.'... '.'.3'.....

 : :- . -.--f. - .- 

.-- x-3:xxx '" 3

:x:xxx:3xxx -

...::1 xxx

3

.-...-... 4 : X-X-X---0---

...v.-..: 4.,,v

 ;;.;.;.;.;.;4 . .-. 

xx: : xx'0v:x:- ;.'.'"... 4 

: x-:;x:4x : : 

:: : :. 3 ,:-:-

'"' !'2.^,-. 

v:;:.v:; :3'v'X:

..-xxx.3---.xx 

...... 4----

xxxxx4x:x:x 

... . .v,.2xx:x:

.''.''.'V'". 

xxxx2x-x-v

v...v.-.v2XXy.

.._... 3.;.;.;.;.;

' ' ' ' " 4 

:x::x : x : 1 ' :x :

.......x: xO. x-x 

 ,.-.. v.v 3v.- 

 :xx : yX2 : x: ':-: 

. v:.yvy3y.x

 : -xxx4vX- 

. :xx4:xx-:

x: xx:: X4xxx 

xxxxx:4 : :xx;

1

 :-::x-x-4 

;XvX-:-2::: x : 0

X;XXX: . 0 XX

RV

12.8 

13.0 

4.3 

17.4 

14.0

14.5 

13.1

10.2 

13.0

13.0 

14.0

15.5 

13.6

<2 

13.4 

14.0

13.0

20.0

13.3 

12.3 

11.9

14.0 

12.4 

12.9

13.0

13.8 

21 

<20

12.4

13.2 

11.0

11.2 

12.4 

<20 

13.6 

13.5

12.0 

12.8 

10.0

10.0

12.5 

13.1

13.6 

13.2 

13.0 

16.8 

<7

Rating

4 

4 

0 

0 

3

2

4

0 

4

4 

3

0 

3

0 

4 

3

4

0

4 

3 

3

3 

3 

4

4

3 

0 

NR

3

4 

1

1 

3 

NR 

3 

4

3 

4 

0

0

4 

4

3 

4 

4 

0 

0

RV

292

3i.O xxxi4,2:x '' 

27:2 : : 

<20

28,4

X < 50 

27.3

28.8

<ioo

29.8

28.8 

32.4

31.0

X 30.5

 :x.v32x5:x:x 

28,9

xx:-34,3xx. 

30.0

x:::27;3xx x 

<50

X 298

xx:3l::7: xx: 

31,6

: 30.0 ;

30.9

30.5 

29,6

 : 4l::7:x' 

..28.8xx::

.xx; .24.3x:: ::: : 30.2

Rating

:: XX4XXX

' 3 V. 

0

. :.:-x:x2.xx: 

NR

NR

.-.-.- --x:4x-::x

....... xNR^ .

4 

NR

;.:-.; X4Xy.X.

 ' 4

. : -2 '' '' 

 XvX-:-3:-Xv

 xx: -4:xx

:-.'X-x : .':-2x:x::- '""".4.V.

0

''"'"'"''4v : v

: :-x:;: 3;:;::: 

NR

 ' :-:- 4 ' 

x:xxv2xx: x: 

...... 3.... ,.

xxx:.'4x:,..

...... 3. .

,..'-'.'.' 4,.v. ' ' " x':4xV

XXXX-O; ; ' ' ' 

-.--..'.4 -.

XX : X'' ::0: ' : '' ::- 

4

RV

55.4 

56.1 

52.9 

57.5 

55.0

49.4

54.0 

56.0

54.7 

53.0

47.1 

55.5

58.4 

56.0 

55.0 

62.0 

57.8

55.4

53.9 

56.2

53.5 

56.2 

60.1 

54.0 

52.0

55.6 

55.0 

54.4 

56.2

56.5 

53.7 

53.0 

57.4 

54.0

53.0

53.8 

58.5

44.0 

54.5 

54.7 

55.7

57.0 

55.0

55.9 

54.5

54.9 

56.0 

49.9 

56.4

Rating

4 

4 

3 

3 

4

0

4 

4

4 

3

0 

4

2 

4 

4 

0 

2

4

4 

4

3 

4 

1 

4 

2

4 

4 

4 

4

3 

4 

3 

3 

4

3

4 

2

0 

4 

4 

4

3 

4

4 

4

4 

4 

2 

3

RV

10:0 

10.0

<10 

<20

:i 0.1 x

;- :::<;2o -'

xxl4;5x:x

9.6 

x: 22.0

<20

<49 

9.8 

10.5

12.0

12.0 

11X3

::::13£::::

xx: .;X9..3xx-: 

10:4

9^5 

<50 X 

<50

'!^M:'

18.0

10,2

-:,xx8;:1;xx: 11.8 

12.9

.. .-<.1v.v

10.0

xx;8:4: x:

9.7

9:8

30.0

x: x:;9:3-'-x:

: .xxx:9.:9 x:

.... 1.8.0... .

: '::vTtis:::: 

6.0 

<20 

10:i

Rating

4

X;X;v,4 ;Xy

NR

XNR

XXX: XX4XXXNR

x: x: x ::: 'o: : : ::x

. . . .-. . A.:::: 

-XXX Q

NR

NR

. -..x:4 -x: " "4 '..

2

'.'.'.: . 2-.:-.:: 

XX-XX-gX---"

x:x:x:x:lx : - : x:

: x: x : xx4x:xx:

:--x:x- 4x:x:

....... .^.....

NR 

NR

NR

:xxx:0 >:: 

. 4

:-xx-x2-xx.-.

'.'.. .2.

:xx:x:xrxxx

.. :: : : xOxx.

... .._....

x; x:3--; ^: .-

 XXX4..V.

-. . .-.x-:4:X-x ' ' ".': xO.'."...

x:xxx4';::'- 

:xx',,x4: x : xx

OX

: . : .V.V.; ,3Y.V.V.

..-:xx:-ox : : : : : : : : NR

; .v.xx 4 x:x.

RV

20.0 

21.0 

2.1 

20.2 

<30

19.0 

19.7 

16.0 

22.6 

29.0

20.0 

17.5

<71 

20.9 

19.0

20.0

78.4 

21.0 

21.7

22.0 

19.5

20.1

17.8 

19.1 

20.1

21.8 

<20

14.4

19.4 

18.7 

21.4

25.0 

19.5 

15.1

18.6 

18.1 

21.0 

18.4 

19.1

39.1 

19.7 

21.0 

15.1 

29.7

Rating

4 

3 

0 

4 

NR

4 

4 

1 

2 

0

4 

3

NR 

4 

4

4

0 

3 

3

3 

4

4

3 

4 

4

3 

NR

0

4 

4 

3

0 

4 

1

4 

3 

3 

3 

4

0 

4 

3 

1 

0

RV

28^7 

23:0

29.6

xxx 2Y 3xxx:x25:9---^

26,4 x: 

26:7

X 26;Q

< 51

27v3 

29.DX

26:0

x::28,0 ; x 

28:0

25v3

28.0

27.8

23.5

23:4

23:3

27,3

:30,9 ;

14:4

x:.2i9;i5-:: : :x 

27.6

25:0 

X 26,7

22,1...

24.1

X26,'V;; : 27,0 x

34:8 

33.3

Rating

X....3... 

: :: .vxx-rxxx

'.'.','.. *.:::.

:xxxx0-'-xx-'

'. .'..'"*. : . ::'..

-.:::.. :4.... :: .-: ' 4

xxx:4xxx

NR :v'v-'4::;xxx:xx2v ;x:

;.vXvX 4. : XXX

Xvxx:: 3xx:::

- .v.y. £. .-,

.......v.3. .-. . . - XvXv 3xx:-x

4-;:;:;.

:-x:xxxtx: .xx '".'.' .'i'.'.'..

XvXXy^XXX

. . . . .-..',4. : :x:

XX.vX: 1vXX

 - o'--v-

. :...: .;.;.2;.;.;.v.. 

....... 4... v..

. : .y.: ,.v.3'.-:.',,

. : . ; x : .vX4.: xx:

0

.. -' - 2x;x- 

' ' ' ;;4;;;x_

..: .yXv4vX;X

::x: : : : : : : :0:: : : x v 

Ox

18
Table 5. Laboratory performance ratings for standard reference sample 7-757 (trace constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/28, number of reported values of 28 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Mg (Magnesium) 

 17:5 ; mg/L .YXX: 0;6 :-: : : : : :;: : : :-:::

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Mn (Manganese) 

13.0 ng/L 

1.1

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Mp (Molybdenum) 

29:6 tig/L

'"i.9" ..':.'.:.....:..

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Na (Sodium) 

55.0 mg/L 

1.6

Ni (Nickel) Pb (Lead) 

10-0 x xfig/L 19.8 ng/

....Y.X1.7.Y.Y.Y.Y.YY...Y.Y. 2.3

Sb (Antimony) 

L :26.8: x fig/L: x

.X^.OXX.X.YXXXY.XXX:

Lab RV: Rating RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating

145

146

147

149

151

154

158

180

190

191

193

196

203

204

209

212

213

215

217

218

220

221

234

235

236

237 X

241 ;

246

247

253

254

255

256

257

259

265

268

273

283

284

287

292

297

304

18.2

XX:i-7:2 XXX:

17;,0: x

17.2

16.6

18.0

: x: i: 7X;6x; x; x

17.7

16,5

17J4

xx^^xx:

xxi7:2: x.x:: 47,2

17_7

15.8

17,0

x: 21:ox: xx:

17.0

17.4

XX47;2YX x:

17.2

X17.6X X

17:5 Y

18:1

xx-1:7,7: :-:;;:.

17.5

;..Yl7.6 ;X;X

xx2l:4xx:x

17.8

x 18,7::XX

17.4

18.6

xxi7:6XYXx

16.0

19:3

xx/i^g'Xxx:

17;2

......2......

XXXX;3';V- V '

x-::x : :3: .-x : x

'.'.'....3.

...X1....Y.

.Y-'Y.gY"

: : : x : x:4-X;.Y,

x:xx4xx:x

X-XY.IX-X

.'.VV. 4 .'.'... ......^.....

xxx v3xx:x

.Y....O.Y.Y..

4

- x-X'Pxx-x V '" V 3""

x: xx.0x::::'

3

x-.:::4x:x

YXXXSXXX:

xx:x3:: :xx

YY.Y.4.YYY

.":. 4 ::.

X VXX3 ; - V - '

:x :;X4xx:x

4

xx:x4x.YY

Y.YYQ..YY

3

:xx: xQ::x':

YY.Y.4YYY :-: x--'-'f 

x-xx 4xx: :

0

0

:x; x: 3xx:

.YYY/S.-X-X

14.0

13.4

13.0

11.0

12.8

11.2

13.0

13.9

14.0

11.8

14.0

13.3

12.0

15.0

12.4

18.0

15.3

14.8

13.5

13.0

13.0

9.0

12.0

13.7

13.4

13.0

13.0

11.7

20.6

12.9

13.7

13.0

12.4

11.6

14.6

15.0

13.0

10.4

13.5

3

4

4

1

4

1

4

3

3

2

3

4

3

1

3

0

0

1

4

4

4

0

3

3

4

4

4

2

0

4

3

4

3

2

2

1

4

0

4

31,0

29.3

29.0

 30,5

XXX25.7XXXX

27.4

28:0

::.YX26,T.;;X;X

X; x32.9XXX:

29.2

XXX^-gX^XX

27,0

26.0

37.0 X

30.2

3o:i

28.8

30.0 X : X : X28X7'-''- : '

30.0

250

28,0

68X0

27.0

X30.0

3 56.3

4 59.2

x:;x-4x:X'

56.0

4

X 1 52.6

54.0

3 56.2

55.1

54.4

57.1

54.4

54.3

52.4

57.1

3 51.8

1 53.6

67.0

1 : 55.2

4 55.3

2 54.9

2 52.3

1 54.9

0: 51.0

4 56.1

4 57.6

56.0

4 56.1

4

4 54.1

;4 53.8

1 58.0

55.0

3 57.8

0 55.8

53.0

2 60.8

58.4

4 54.5

4

1

4

3

4

4

4

4

3

4

4

3

3

2

3

0

4

4

4

3

4

2

4

3

4

4

4

4

2

4

2

4

3

0

2

4

16;0

<40

9:6

10.2

9.4

xxxxx8,9xxx

<16:3 : : : : : : : QQ

9.6 : :-:

41,0

< 50

... ....8.7.;.;.;.;.;

X 11.0

9.0

x x x< 4o:: xx::

17,1

x 9.9: x

10,4

:xxX'9:5v xxx

. xx.Y:: :9,o:xx:

22.0 'x : x : 'i': t6':v ": x":: <:l5: xxx

11.6

:xx<:i5XYX

8.4

 Q-8

. xxl:1.7xx:x

10,3

X 9.0 X

<20

9.7

YX-x : X8.8:x:

13.0

6,0

xxx<:20 : x : '

gg

: : : 0

'"'4'.'.'." NR

YY.Y.4.Y.Y.

4

xxxx:3xxx

NR '.' ' ' ' ' :4 '.'.'. '

x x::::4 '-; ,:

0

NR

'-'.., .Y?...,,.

xx:: x3:X: x:

3

NR

0

XXX: X4XYX;

... .Y.4'Y.-.

;XXXX4XXX

:xx:3 : x:: 0

NR

NR

...... 3......

NR

3

:xY:x:3xx'

Y...Y.3.Y.Y.

4

:-:xx:3;v xNR

 ..Y.-. ^.Y.Y

xxxx:3x: x:

1

0

NR

4

38.0

21.5

19.0

20.0

19.5

19.6

<31.9

23.6

17.9

21.3

20.7

19.0

16.3

18.0

18.3

15.9

17.4

19.7

17.5

24.0

23.0

20.9

26.3

20.3

16.9

<100

23.5

33.0

19.8

17.8

<100

13.5

21.0

20.0

18.0

18.0

22.2

19.3

0

3

4

4

4

4

NR

1

3

3

4

4

2

3

3

1

2

4

3

1

2

4

0

4

2

NR

1

0

4

3

NR

0

3

4

3

3

2

4

xxx<' : 50:x:x:

27,0

X 27.9

...... 2S.8.......

Y: ; <;.27.8-X;x:

xx:x.26,8.-Y::

28.0

29.0 '"'::X25.7'"'

26,8

X;X; . 25:gX;XX

'.: 325 xxx-<-85'xx v29,8

YXY56.1XXX

x : x; ' :' :9:6': ' :" ' :

28.2

::25:5 :::"

X20.0 X

X 28:0

26.7 X

NR

.....Y.4. ;. .-. 

 X'.:x ;3::x:::

4 '......

NR

XXXX^XXY:

.....g.....

xx:x:-:2.:x::

.YYYgY "

xxxx*x: :x::

x: x; :x 3: xxx:

0

NR

,x::"2x: : : 

XX : X OX;;;.;

: x:;x- :ox:x::

3

 ' '"-' ' '3 ' ' "

:YXYXO.YXX

v - :v -3";;.

 :::-x-:-4-:-x-x

19
Table 5. Laboratory performance ratings for standard reference sample T-151 (trace constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/28, number of reported values of 28 possibla values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Lab

1 

3 

4 

5 

8

10 

11 

12 

13 

16

18 

19 

21 

23 

24

25 

26 

30.1 

30.2 

32

33 

34 

39 

40 

42

43 

46 

48 

51 

59

64 

68 

69 

70 

76

83 

84 

85 

86 

87

89 

91 

96 

97 

100

102 

105 

107 

110 

118

119 

121 

126 

127 

134

136 

138 

140 

141 

142

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Se (Selenium) : : ::.

i.80 ng/L

x ; .yX|. 39Xy.yX : :xxxxxxx

RV Rating

....... <.t -.-,,,... v.NR . 

<10 NR

<2 NR

x :xO.: iO':::x v::' : ^2 ::x

. .- x . x:<-2x vx:x:,NR.;::

..'... < 5 v.v.v. NR 

2.90 3

Xyyy ; <i.yX.yXyxNR 

: XyXy<:iyXYXxxxNRx: :

< t29 NR 

:<0.5 : : NR 

'T'<Vl. -. '-.NR,.

< 4 NR

xxxx<2xx " NR

< 6:4 NR 

089 3

1.80 :4 

<5 NR 

<10 NR

xxx:x<2XXxx-xxNRX"

<2 NR

x; :y.y<> ixx : x:xxxNR:x 

XyX-:<:2;:yX--x-" NR--

6.00 -:-: : : : : : : : 0 :

';;;;;;< ?; ;;.;;.;. ;.NR.;/

2:50 : 4

0;48 3

'"'';<t""^,NRv..

xx^yX^xxxx-xxNpr-- 

xxxo;36x.xxx x x x:2xxx

48:00 0

' xxxx :<'i:xxxxx- vNR''-

^2,20"'''. y'.V .4.V.V 

 Xy: : :6; g4Y-x-::x-x--3Xv '-'

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

SiO2 (Silica) 

1 .43 mg/L 

0.10

RV

1.40 

1.83 

1.55 

1.44 

1.30

1.47

1.47

4.36 

1.52

1.47

1.62 

1.75

1.40

1.36 

1.36

1.37 

1.35

1.41

1.40 

1.78

1.08 

1.57 

1.38

1.46

1.50 

1.44

1.35 

1.47

1.38 

1.38

Rating

4 

0 

2 

4 

2

4

4

0 

3

4

1 

0

4

3

3

3 

3

4

4 

0

0 

2 

3

4

3 

4

3

4

3 

3

Rating Absolute Z-value 

1 (Marginal) 1.51-2.00 

0 (Unsatisfactory) greater than 2.00 

NR (Not Rated)

Sr (Strontium) Tl (Thallium) 

387 ng/L 62.0 ng/L

^::':':W:..^ :.,. .' . Q.Z

RV Rating RV Rating

389 4 63.2 4 

405 387 2 57.0 3 ' ' ' 4'-''

 xxx x4lOxx x xxx xx2xx:x 

381 4 <5Q NR

380 ; 4 64.1 4

xxyxyxxxxxx x xxx: x x x 68.5 2 

358 1 67.0 3

366 2 61.0 4

xx:x ;4-|2x:xxxxxx1 x x

416 1 <68 NR 

390 4 60.0 4 

362 1 66.0 3

xx : xx422:::::v:;-v:;:;.0xx;,

-xx:.37a x-x-xxx- 2 ' 

X:XY 255xx x x xx x:Qx:xx

74.8 1

v yxxxyxxxy.yxxxxxx xx 55.5 2 

65.0 4

 xxx x.xxxx-xxx : x : xxx: xx 66.8 3

384 4 53.7 2 

XX XX 71.0 2 

394 4 58.9 4

xxxx387xxxxx-xx:4-'--x: 

v. ;::.408v:;:v:;:;::: : x;2 : xx

52.2 1

X 311 0 65.2 3 

387 4 33.5 0

396 3 122.0 0

401 X 3 62.0 4

X 63.8 4

::::x.387^'';;;;;;4';;;

364 2 60.3 4 

389 4 64.4 4

374 3 151.0 0 

392 4 67.0 3

X;XXX.X : XV.X -.v.v-XXX; 54.0 2

392 4 99.0 0

U (Uranium) V (Vanadium) 

15.0 jig/Lx 59.0 ng/L 

0,6 4.3

RV Rating RV

15,0 4 58.3

X.-XX.vXXXv.XXXX-XXXX.Xv 60.0

Z'' .'.V ^..'. ^.Ti'. 53.7

;X;Xy.XXXXXX : XXXXX-XXXX'- 5g_ 0

.XXvXXXXXXXXXXX-X-XX. 55.0

xxxxxx-x- xxxxxxxx" 57 ^ 2 

20.1 0 59.9

56.0

x-xxxx-- - - - -- -- - - - - 5g_ 0

XXX-:XXXXXX-XXXX'XXXX' 58.0 

58.0 

14.0 2 56.0

15.6 3 58.0

'''''^..'^:..^v^v ' -.... 58.0 

 x:x-x-x.-x:,-'X-x:x--- ' - 55. 3

 xxxx'xxx xxxx--- - 607

: : y::; .: : x: x: xxxxx: :xxxxx.x 56.0

.,. ,,,.. . .,.. - - 57 ^ Q

;.;.. ; ;.;;.... v.v. . . v.vXXX XXX 59.0

 xxx : xxxxx: x::;: x; : : xxx : x: - 62.5

89.2 

66.8

 x-xx':,xx:xxxxxx: xxx: x- 57.4

59.0

 x::x-XvXv'X-x:x--x::v- 59 ^ 0

12:3 Q 49.5

<20Q ;NRX 55.0

,:. . :.-. -,.vX.-.'.'..v-:::-::x : x 58.3

57.4

x:Xy xx:Xv : . : .XyXvX: x: 57.9

x::X'-'x-xx-x-:-x : - x-x:x 51 _ 0 

21.8 0 ; 60.4

Rating

4 

4 

2 

4 

3

4

4 

4

3

4

4 

4 

3

4

4 

3 

4

4 

3

4 

4

3

0

1 

4

4 

4

0

3

4

4 

4

1 

4

Zn (Zinc)

x6x57x 

2:24

RV

6,30

11:00 x

:6.15 

x <io :

8.50

.. <10 

6.10

< 100

 -. -.-< -20 : : . 

5.80

x-: x<-4- ;v 

5;93x 

7.70

7.00

xx 6.80 x 

5i9b 

6-08

9:00

8:70

186.00

v:x<;50:vX' ;

XXy<X2bXyX

6:10 

5:96X

17.10 xx

x:. ;x<:i:o x:;

5.00 

5.26

: 7.00::: 

MO 

5X00

10.00 

6.10

.vv.<20,.::; 

6.55 

5.10

20:.90 

X6.58; 

10.00 

 tl.80 

6.45

jig/L

Rating

4

y. : .yX;1yyX

 x:-xx4xx 

NR

3

NR

: xx: : x :4"-:: : : : : :-:

NR

NR '.'.'.".'.'.4.'.'.'.'.'

NR

. . ... :4.. :-:-.-. '''''' 3''^'

x:x,4-

 .-,. 4:xxx 

'^"4;;;;; 

: xx:4xxx: :

x :::x2: x ::x 

. .-. . -. .-. 

 ..-.-.P.,, 

NR 

NR

 -. -.-4.-.----

: :x:-x :4: xx:: - o x 

NR

^ :,3.,,,v

x:-xx3 xxx

:xxx4xvx :.:.'2.v.v.

Xx: :x3:x:

1

.-x:x4.-x

NR -:-:: 4 - 

XyXySXXX

. -. .--Qx-::. 

 4 - ' 

 xx.1xxxx

0

yxx-4:x:-x:

20
Table 5. Laboratory performance ratings for standard reference sample T-151 (trace constituents) Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/28, number of reported values of 28 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Analyte = 

MPV = 

F-pseudosigma =

Lab

145 

146 

147 

149 

151

154 

158 

180 

190 

191

193 

196 

203 

204 

209

212 

213 

215 

217 

218

220 

221 

234 

235 

236

237 

241 

246 

247 

253

254 

255 

256 

257 

259

265 

268 

273 

283 

284

287 

292 

297 

304

Se (Selenium) SiO2 (Silica) Sr (Strontium) 

i;80 jug/L 1.43 mg/L 387 ng/L

,,xx1:;:39xx:v:xx : :x:x:vxx 0.10 -::::-- x^xxxxxxxxx, 

RV

x < 10

1.26

<53.2

.'.. ."3:-:-:-:.

X:.xx<:-5xxx : 

2.46

x x x :< 2'.'.-'.-.

: : 0.50x 

0.28

 : : :< 90

<80

...v"<2;;;;

XXXX< 1 X

0:70

3.00

X X2.00

Rating

NR

NR

. .....4..... 

NR

NR

 . A:

X NR 

NR

NR

NR 

NR

NR

NR 

NR

NR 

NR

NR 

NR

;;;;;: ;4:;;;;

RV

1.48 

1.40 

1.50

1.43 

1.32

1.41 

1.55

1.40

1.20 

1.32

1.44 

1.10

1.77 

1.50 

1.54 

1.01

1.37

1.50 

1.25 

1.61 

1.37

Rating

3 

4 

3

4 

2

4 

2

4

0 

2

4 

0

0 

3 

2 

0

3

3

1 

1 

3 

0

RV

397 

376

X 354 

382

37 

460

383

: X4Q7:

397 

376

390 

389 

380

376 

400 

397

413 

474

Rating

.......3.....

yXy.ySXXy: 

 XXXX-4XX

... A

Q

X;XXy.4XXXX 

...::: A -.-..

- x: : : 3 -

'xx: x: : : 3Xv.x :

:..y:.3.vXX

4

 -- --- g-.Y.-.Y.

;;; .v.r.

Tl (Thallium) U (Uranium) V (Vanadium) Zn (Zinc) 

62.0 ng/L 15,0 ng/L: 59.0 ng/L 6,57: Mg/L x 

6.3 0,6 4.3 2-24

RV

61.9 

62.0

67.7

67.0 

60.1 

58.6

51.8

62.0

31.0 

60.8

55.0

67.9 

72.6

<18.6

58.5

17.4 

67.0 

84.0

55.0 

62.0

Rating

4 

4

3

3 

4 

3

1

4

0 

4

2

3

0 

1

0

3

0 

3 

0

2

4

RV Rating RV

.YXXXY.XXXXXXXX-XXXXXX 65.0

60.2 

15.0 4 59.0

XX'XXXX-' ...-.-.. Y.Y.Y.Y 62. -1

.yXyXyXyXyyXXyXyXX;. 62.0

69.8

.Y..yy.Y v y.yyy.y.Y..yy 57.0

: :x-:xxx:x: : :: xx:xxxx: x 89.0 

15,0 4 56.5

y.yXyyXXXyX XXXXXXXX 70.0

xx:x.xx : x : x : x : x ; x : : : :xxxx : x: 63.6 

64.0

670

XXXXXXXXXXYXXXY.XXX:- 59.2 

65.6

x : xxxx: x: . :: x : xx'xx:xx::: ' : 64.1

14.8 4

XXX XXX XXX XX. XX 63.0

.-. .,.. : :.. xxx xxx x. 9.5

;:;.:; v;;..;yy.y.y.y so.s

15.5: : 3 59.7

.'^... '! ..-. 66.0

15,8 x :2 65.4 

40.0

X. : X;X-XX.'X :XXXXX::A: :XX : X 63.0

Rating

2

4 

4

3 

3

0

4

0 

3

0

3 

2 

2

1 

4 

1 

2

3

0 

1

4 

1

2

0

3

RV

13.00 

<20 

6.00

6,70

2.10 

7v10x 

4X10

7.00:::

<50

6.00 

6.34

:6:00:

9,00 

4:00

 6.00 

6:40

5.08 

:5:00 

7.00

5.80

x.x<"20xx: 

12-00

14:00

10.00 

9.50

Rating

:: xxx 0 xxx

NR

xxxxx4:x--

4

Y::-xxx4xx;x 

xxxx:x4": : : : : : : :

NR

NR 

NR

yX:X-NRXy.

2

".'.'.' .'.'.4...... 

:xx:-xx2xxx

NR

x:xxxx4: xxx 

NR

NR:

Y ;xx:x:3xx:x. 

:-.x,::4xx::

NR

o

xxx Oxxx

1

NR

21
Table 6. Laboratory performance ratings for standard reference sample M-144 (major constituents)

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; uS/cm, microsiemens per centimeter; Lab, laboratory number; OLR, overall 

laboratory rating for all reported values; V/16, number of reported values of 16 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte = 

MPV = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

11 

12

13 

15 

16

18 

19 

23 

24 

25

26 

30.1 

30.2 

32 

33

34 

38 

39 

40 

42

43 

46 

48 

51 

57

59 

64 

68 

69 

70

76 

83 

84 

85 

86

87 

89 

96 

97 

100

102 

105 

107 

118 

119

121 

127 

134 

136 

138

140 

141.1 

141.2 

142 

145

OLR

3.6 

3.1 

3.1 

2.8 

3.6

2.4 

2.9 

3.3 

3.0 

2.7

2.4 

3.4 

2.5 

3.4 

2.1

3.5 

2.5 

3.3 

2.5 

2.9

2.5 

3.2 

2.8 

2.3 

2.9

4.0 

3.4 

2.2 

2.8 

2.1

2.9 

3.9 

2.5 

3.2 

2.7

3.8 

3.2 

3.6 

3.5 

2.8

2.8 

3.2 

3.4 

3.1 

2.6

2.0 

2.8 

2.9 

3.2 

3.2

3.6 

3.2 

3.7 

1.0 

3.8

2.8 

1.5 

1.3 

3.1 

3.2

V/16

15 

15 

13 

15 

13

14 

7 

12 

14 

14

14 

10 

6 

13 

14

12 

8 

3 

14 

11

2 

9 

12 

13 

7

10 

14 

12 

10 

13

11 

9 

13 

10 

13

4 

10 

9 

15 

12

12 

13 

7 

13 

14

10 

12 

11 

6 

12

5 

15 

15 

7 

15

12 

13 

3 

15 

13

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01-1.50

Alkalinity 

88.8 mg/L

x;x: xxx 3;7xxx xxxxx- ,-RVxxvX-X'

89.9

x: xxx;90xoxxx: - :::- ; - 

,,,v,69.3xx-x-x-x 

88:6 

x^x^P^"

...,, 83,5

:$0,0

x-xxx: :86.6x:: x: xx 

..-,-, ;mQxxxxx-x 

81.0

-x-x,x9t,?-xxx-xx

90-0 

90.0

,,.,-,-9i:.3x-xx-x-x 

93,0

89:0

x-xxxgi^-x:-:-

,vXXX88.0X-X: XyX93.4

; X: XXX88:8::X:X' : ' :

,-,,,,$2,7xxxxx: : : 143.0

X-X-Xv.88';QX--'-'XvX91.0

 xx-x-88,0-v " v " 

,-,-x-74.0.xxx,x

91. 0

xx; x: X84_0x-xx:xv

88,5 -x x-x

x: x:x: x :$7. 7xxxx-x--

8&0 : x: x: x:v 

 v^.,9r,0,-xx-x-x

,,xxx-87:4-xxx-x: - 88.9

XyXXX-90,7'V- V"V -"

91,'ox. .......

x: XvXX9i: x6: x; xx'-:::

,-,-,-,9f,Ox-x-x-x-x x 93.4 - - 

 x : XyX48,0x---x-xxx

'':: '"':$&$ --^

: x : x: x ;xs5:4::' : 'ViV '';

,yXyX92,OxXXXvX

91.6 

91,6 ....... 

X-X: X:X'88;7:XX:X:

,,,,.... 92,6

^yXyX-^eX^-X-'X

" :::v ':82'.o;:v :::

xxxxx76.O::::: " v -

XvXy.vX-x: B

Rating

4

xxx4xxx.

xxx4xxx. 

4

xxx4xx.

 .XX2XXX 

4 ...

 XX:-3XXXX

 xx:4 xxx ' ' ".'1 '""

::::3,.,:::

..4.V.V..

,-,-4.-,,

:x-,3x: x: X' 

,,;.3.v,-,.

 ' ' v4xx.V

 :-:-:^ - 

x- : x4xx: x-x

, , 2. , . , . ' ' '" 4 ' '" ' '

X^^XXXX:

0

; ,: .y4,.v,,,

,.4.xx-,v " V4'x"" 

x xo : : :: : :

. ' 4-,'-:v- ' ' ' ? '' ' ''

4

^A'^.

;X : x3xxx: 

xx: 4xx: xx

.;Xy4XXXX 

....4.-.V.V, '-' A '" ' '

A

xx- 3x-xxv

xx-4xxxx .._.......

X-X0XX-XX

':':' A- :'.':'.:. 

 3 - 

x:x3;-:.x

xx-sxxxx

....3,...v: -xx:4x-.xx: 

xx-3xxx::x

'^::;::

. -.2- -.-,,'-' ' x x-0 - 

(Boron] 

46.1 

7.3

RV

45.7 

52.0 

46.9 

45.0 

70.0

46.5

71.4 

207.0

<50

45.6 

<23

42.2 

43.0

48.0

34.0 

46.7

39.4 

43.0

<100

87.3 

< 100

50.0 

45.4

80.7

<100

44.1 

46.2 

10.4 

49.2

64.6

50.0 

52.0

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Ca 

jig/L

Rating

4 

3 

4

4 

0

4

0 

0

NR

4 : - :::' : 

0

3 

4

4 ': :;:

1

4

3 

4

NR

0 

NR

3

4 ::::

0

NR

4

4 -/ //. 

0

4 XXX'

0

3 X.XX: 

3

Absolute Z-value 

1.51 -2.00 

greater than 2.00

(Caleitim) Cl (Chloride) DSRD (Dissolved Solids) 

74yO mg/L 77.0 mg/L 546 mg/L

RV Rating RV

75,0 x 4 76.2 

77.7 2 77.6 

X 68:3 XI 73.9 

76.4 3 71.0 

73.4 4 78.1

77:0 3 81.0 

xxxx-x^xx-^^XvX 77.0 

71.3 3 75.2 

73,9 4 70.2 

75.0 X 4 74.7

71.0 3 81.1

72.5 4 75.0

....:.:,, v..,v,,xxxxxxxx 74.8 

73:8 4 77 .,

75v4 4 76.9

75.1 4 78.0 

60:0 0 74.9

: - :7i;oxxxxx::x::x: :3::- : : :x 

79,5 1 76.1 

80:6 0 74.4

73.8 4 

70.4 2 82.5 

74:2 X 4 73.7 

80.3

74:2 4

72.1 x xx:3 ;:;: 77.7 

77:5 2 71.0

 -:77;3vx: xxx: xxxx2xxx-x- 86. 2

7i.6 3 74.0

73.8 4 74.8 

75.5 X 4 77.7 

75,0 4 77.9 

71.5 3 78.0 

7$,9 3 83.0

.XXXXXXXXvXXXXX-XXXvXXX 77.8

72:6 4 73.8

73.6 4 81.0 

71,8, 3 77.9 

75:8 3 78.1

68,5 1 76.0

88.5 0 75.4

xx; x: x: x;x; xxxxx-x-xx'xx 783

72.9 4 77.6 

75:9 3 82.4

71:0 3 76.9

72.0 3 77.0 

73.9 X 4 75.0

73.0 4 74.5

,74vO-xxxxxxxx-4-xxx, 

76.5 3 8Q6

: ;74,4-xxxxxx::-4::x -': 77.5 

19.8 0 

75x0 4 76.2

71.0 3 78.9 

64:9 0 74.4

;,;, .;;,;.;... , .- ,. , - , . , gg^

73,6 4 79.2 

74.5 4 80.4

Rating RV

4 554

4 550

3 "::.553v.v.;. '..::.

1 Xv-x-x-553x-x:x:x;:

4 ,.;.;.;,..;.;,S47v.-. : . : .-.y.;,,.

2 532 4 -xxxxx-'sgo -- 

3 x-Xv::x-534.x-:xxxxx:

0 560

3 x : xxx..x 525-vxxxx.-x

2 ,xx,x530 xxxxx--: 3 ' ' ' ' ' v/545 " ' ' ' ' '"

3 XyXyXyS46X:X;XyXX 4 , ., ,-,. ';,-,,., ,, ,,-

4 . ,,.,,yg^2' -: : -v

4 xxxxx.--562x-xxxx:xx

3 ........... ;X;... ;.;,;,;..;;,;. 

4 '^^S&M^

3 ,xxxxvXxxxxxx-,xX':

1 .,-,,v,-540xxxxxxx: 2 -;; -.-.. g48-,-,v...,-,

2 x:xxxxxxxxxxxxxxx:x:

550

4 ::v54J:-:-:;:-:::-:-:-:- 

1 550 o ' v ' ' v::.54o: ';::;'::

3 X 550

3 ,vy,y,,548xxx-xx:xx 

4 78

4 .y,,y,;,,,,,v,- 

4 xx.xx :x:547': x: xx: x: x; 

1 546

4 . :.. ,-,,-, , 

3 xxx:xx:-xxxx::xxxx-x:::

2 '^'....^...^..'^. 4 xxxx'- $22 ///.-. : : -.:: 

4 xxxxxxx:-:x:xx: :;-: - 

4 556

4 x: x;xx'54ixx; x: xxxx

4 561 4 xxxxx- 56r" - - - - .

1 XXXXXX34&.XXXX-XX

4 ..-,,,,.,.. ,,..,,,,,...,,

4 .'.'. . 592::;;:.;;

3 xxxxxxx - - - -

,x-x-xS$3x-x-;xxx3 529

2 ., , , 578-XvX xx: x 4 ';';';';'";'; 556 ;';';;;;':;;;

4 .,,,,,,, 535, ,: : : : : ,,:

3 549

3 ,yXyXy540yXXX: X-X--

0

3 ::: '"- ::::530'"'""" 

2 xxx-xxx: x-xx'-xxx--'

Rating

3

x,x4;;xx: ; 

: A ....-.-.

Xy,,4-.,v,-,,-

: :xxx4xx:;;:-:

.....3......-.V.

X,-,2.vXX,,:.

-xx:x3:-xx:xxxx

...... 3i-,.-,-,,v.v xxx2xxxx-------

xxx:'2x-x-xxx-x '"4""" .'.'. 

;:x:-4:xxx-;x

' "o"::;":.

,y,.2v,y,,v

:xx-'3-/xx '- ' ' ' 

 :-:::-.-4:;:-:-:-.::>:

;;;;;"*;;;;;;;;;'

,,,4.-.v,-,-,

;,v,4.v --

x::x4;x: xxx : x

:::v:4,., ,,,,..

,::., 4, -.-, 

:x:4 :: : : x:

. . . Oy.y, ..;.;.; 

y.y. ,4 ,;.;, , , 

.xx,4xxxxv.

yXy^XX-XXX-X-

...3.........

XXyxjXX'XXX 

,-:.,2::.XXX.

 2" " ' '' 

x;:x4xx;x:-'

'v"-0--x-x'.'xv

V.Y.vQ., Y.V.V,

.'.. 2x-xxxxx

XXXDX: X: 'XXX:

 ::: : :* ::: : : :-:-: : :

X...4.... ...-. 

xxx-:4xx-:xxxx-

 ' 2-,'-xxxx.

22
Table 6. Laboratory performance ratings for standard reference sample M-144 (major constituents) Continued

(MPV, most probable value; (ig/L, micrograms per liter; mg/L, milligrams per liter; (iS/cm, microsiemens per centimeter; Lab, laboratory number; OLR, overall 

laboratory rating for all reported values; V/16, number of reported values of 16 possible values; RV, reported value; <, less than.)

Rating Absolute Z-value 

4 (Excellent) 0.00 - 0.50 

3 (Good) 0.51 - 1 .00 

2 (Satisfactory) 1.01-1.50

Analyte = Alkalinity B 

MPV= 88,8 mg/L x 

F-pseudosigma = 3.7

Rating Absolute Z-value 

1 (Marginal) 1.51-2.00 

0 (Unsatisfactory) greater than 2.00 

NR (Not Rated)

(Boron) Ca (Calcium) Cl (Chloride) 

46.1 u.g/L 74.0 mg/L 77.0 mg/L 

7.3 3.2 3.2

DSHD (Dissolved Solids)

:::: x xx546XTng/|xxxxx xx- x xx'-v

Lab OLR V/16 Rating RV Rating RV Rating RV Rating Rating

146 

147 

149 

151 

154

158 

180 

190 

191 

196

203 

204 

208 

209 

212

213 

215 

217 

218 

220

221 

224 

230 

234 

235

236 

237 

241 

243 

244

246 

247 

253 

254 

255

256 

257 

259 

263 

264

265 

266 

267 

268 

269

270 

273 

283 

284 

286

287 

292 

294 

297

2.3 

2.4 

2.5 

3.5 

2.4

2.3 

2.8 

2.7 

3.6 

2.8

3.1 

3.2 

3.5 

0.8 

3.0

4.0 

1.6 

2.6 

1.0 

2.7

3.0 

3.3 

2.4 

3.7 

1.5

3.1 

4.0 

2.5 

4.0 

4.0

3.0 

2.3 

2.2 

3.9 

3.3

2.4 

2.5 

3.7 

2.8 

3.2

3.7 

3.3 

3.3 

2.1 

3.4

3.0 

2.7 

1.6 

1.5 

2.0

1.7 

2.8 

3.4 

3.0

12 

5 

12 

8 

14

12 

12 

13 

9 

10

11 

11 

2 

5 

12

4 

14 

13 

8 

9

9 

7 

7 

15 

4

15 

2 

13 

3 

3

11 

14 

6 

7 

11

10 

12 

15 

10 

11

10 

12 

6 

9 

7

5 

13 

15 

13 

8

10 

12 

8 

9

91.4

:::>::: a7.0p:: 

'''' '' ''^''M&:'. 89.0 '.':.':.

x-x-x-x-87'.O-x-xxx 

..-,,,,, 88,4 

83.0

85,0

85,0

xxxxx93.7YXXxx

xxxYx87,9x:: xxx

91.0

YXY.Y.g4;0.XXY,.

-. xx-m9 : xx xx

YY.YY70.&YXX

89:6

90.0

XXXXX : 9t.0.vX;XY

xxxxx-9i:.0-v;;- v;

V.-.Y. . .86,6 YXYX :

90.0 

91.0

.;;.;.;XV84.0'X ' X XX

xxxx::88;8-:x: x: x: 258.5 

88.0

xxxxx-85:0-xxx x : 87,5 

87.0

92.0 XX-XX-S7.5-XXX--

-x xx xx89,7x:xx : x 

91.2 " ::: ''- ; 95,Ox'X " V 

.,xxx. : 99.:7: xxx: :

80,0 

80.6

xxx-x-,89,6xxxx x 

86.0

: : v xxx :ox: x-xx

.Y.Y..Y.4.Y.Y..

 X-.-.-XX3XXX-X3

x': x x x2-x: xxx

.Y.Y..-X4..-.-.Y-

,",,,.. g ".-I

X : : X XX4YXY

XXX-X0X-X-:

::: :* ..

x-::.-x-:4,. : x:

.Y.Y. Y.4-.Y..Y

:xxxY.4:XYXX

Y.Y 4.Y Y

x :xxx:2xxxx: 

Y. ; XYX;3xxx;x

 : : x : x : x : P:: x;::: 

x : xx: x3-xxx-

.Y.Y.;.Y.4- -,,.-.,

:;.:::::: (:: : . : :

"'2''':. 

: ; x : xx:0-X:.::

xxxx:-3 xxx

42.0 

40.7

40.0 

58.6

<100

40.0 

44.6

46.1 

74.0

40.0

46.7 

45.3

41.0 

48.5

46.0

46.0 

60.0

63.0 

35.7

3 

3

3 

1

NR

3 

0

4

4 

0

3

4 

4

3 

4

4

4 

1

0

69.8 

70.0

;Y.;;.75vO. ;" ;..

YYYY-,68,1XXX..

81.0

68.0 

72,1

xxxx74:6Yxx' : 71.1 

72.5

137.9

74;6

66,6

x 71 _ 0

72.8 X

70,9

65,1

x.xxx 76:4xxxxY. YYX79:0.yXYX

71.6 

83.1

74,0 

796

X73.7

...... V.75,5.......

75.4

Yxxxx75:0.xxxx73 ^ 0

76.0

75,9

74:0

.'.'.'.'.'.Tir :,...,.. 

77.0 

:-.YX;X72.ixx: x : x

73.6 

77.3 

69,7

76.0 

76.7

YXYXY76JY.YXX

 ..-. 2

...,::2---:: 

..-...., . 4,.,.Y

xxxxx1x:x:x.

X;Y:OXXX

X.YXXX1.XXXX-

..^3^^ x-x-:-x-4x-x-X'

' ::'!* : .....

.-.;.;.;.;.;.. ^..-,,.

.--..Y..-.0,.YY. ^'^'3VYY

XXYXX4XXX-X-

.. ... 3...

-Y-XXX-OXXX-.-:

,,,,,.,, ^. ,,....

YXYXY.tYXXX-

.Y.YX; OYXYX

..-xxx4xxx.

-^'- I:Y'-'-

x-.xxx:4xxx:- .....:.4....Y..

.Y.YYY4.-.-.-::.--

.;.;.;.;.;.;.;4;.;.;.;.;,. 

.....A.....

xxxx-3xxx:-

3

xx: : : x4x: x: : : x:

-,,.-,. . A ... ' 3"-"-

x: ' : xxx3x:x':: x:

''''.'.'."'.'A'/.'"... 

x.,x2 x x-

.Y,. ; ;.Y 2..... .;.;..,.

3

X.-.:X;:?IX;XYX

x-:;x::3xx x : ' : '

79.4

71.0 

77.0 

76.6

83.1 

75.9 

71.6 

77.1 

71.1

76.3 

74.7 

74.4

80.4

76.0 

96.0 

75.2

81.7

76.9 

78.2 

78.2 

78.1

81.0 

78.9

74.8 

77.3

79.5

76.7 

77.0 

80.0 

81.5 

80.0

76.3 

79.0 

77.2 

78.0 

80.5

77.0 

69.3 

71.9 

88.7 

74.0

6.0 

77.6 

79.3 

76.0

3

4 

4

1 

4 

1 

4 

1

4 

3 

3

2

4 

0 

3

2

4 

4 

4 

4

2 

3

3 

4

3

4 

4 

3 

2 

3

4 

3 

4 

4 

2

4 

0 

1 

0 

3

0 

4 

3 

4

538

547

XYXX 534x:xxxx

.Y.YXYX;533:xxxxx:

Y.Y.-.., ,570,,,.-. xx

Y.Y.Y..Y.53g .Y .:- .: . 

.'....... '.Ml.-.:::::-..

xxxxx-540 YX:XY.

XXXXXX539XXXX : X :

XXXX-x53.1.;.Y.Y.Y.Y

.,;.;.;.;.; 553.;.;.;.;.;.;...

Sl?3

xxxxx:-522xx-YXX' 

496 

1548

ff«

3

xxxxx-4x-xxxxxx x xx 3 x x: x: xx

3*:;;:?

YYYXYXlXXXY.YX

YXYXYX4-XYX: XYX

xx-,x-x2vY: xxx

SCI

3C

^'..^O-'Y.Y,YY.Y

 vX-YX-Q-X-XXXXX23
Table 6. Laboratory performance ratings for standard reference sample M-144 (major constituents) Continued

(MPV, most probable value; >ig/L, micrograms per liter; mg/L, milligrams per liter; ja.S/cm, microsiemens per centimeter; Lab, laboratory number; OLR, overall 

laboratory rating for all reported values; V/16, number of reported values of 16 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

11 

12 

13 

15 

16

18 

19 

23 

24 

25

26 

30.1 

30.2 

32 

33

34 

38 

39 

40 

42

43 

46 

48 

51 

57

59 

64 

68 

69 

70

76 

83 

84 

85 

86

87 

89 

96 

97 

100

102 

105 

107 

118 

119

121 

127 

134 

136 

138

140 

141.1 

141.2 

142 

145

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

F (FluOride)

0:04

0,21 

0.21

0.14

0.70

X xxxxoxi4 xxx x x

0.17 

Q24

xxx:x:0,23xxxx:x

XX: X XO:25XXXXX

...,. .0/23,,Y...x

;; : ;;: ;; o.2S ;;;'";';

XYX-x xo;24xxxxx 

0,20

0,20

X.XY O . :1: 9----xxx:

0.24

0,27

0,26

..Y..,,.-Pr25, ;.;.;.;.;.;.;.

0.22

XyXyxo:23x:xx x x 

0.22 

0:23

.y.Y.y< : 0,2.y.y.y.y

0.21

XX X X xO-2lYX;XyX:

.,xx,.0;24xxxxx:

0,22

y Q;27 ,,,,,,.

0.26

-. . .-. . 0:24 .Y.Y 

0,20

Rating

YYY.O.Y.. ;.

yXyXOXXyY,-Y. ..,.x:2x,x: 4 -

4

: : x x x4xxx: 

:xxx:4:xxx.

;3xx

X :xx4xx;x: 

 . .-.., 3-x-xxxxxx2xxxx

2

 ,,.V,3.Y.Y,.-

x x xx3xx; x

4

xxx-4-xx

-xx::-4xx-x

NR'2.;;;;

... 3;.;.;.;.;.

..y'x'4yXXX

xx:x :4:x x x:

Y.XX^.XXX

XX X' :3: X: XX

xxx4xx.x: 

...... ^ ....

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

K (Potassium) 

3.60 mg/L 

0.26

RV

3.56 

3.64 

3.14 

4.00 

3.56

3.31

3.77 

3.57 

3.80

3.80 

3.39

3.34 

3.60

3.63

3.80 

3.66

3.78 

3.43

3.60 

3.42 

3.82 

3.59 

4.30

3.90 

3.86 

3.73 

3.93 

3.92

3.54

3.62 

3.48

3.12 

3.38

3.50 

3.42

3.10 

3.47 

4.53

3.00

3.66 

3.59

3.50

3.40 

3.00

3.59 

3.38

Rating

4 

4 

1 

1 

4

2

3 

4 

3

3 

3

3 

4

4

3 

4

3 

3

4 

3 

3 

4 

0

2 

3 

4 

2 

2

4

4 

4

1 

3

4 

3

1 

4 

0

0

4 

4

4

3 

0

4

3

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Mg (Magnesium)

x :1 7:0 mg/L 

0.6

RV Rating

..].'''..'i7&'.".'.'"'.'.'.'...',-

16.9

15,5

.yX,"-16.8:X ' XXyXXXy

Y.Y.y.^j.Yg.Y.Y'.. -. . . . 

.,..,. X1 7:4,... Y.Y.Y.Y.Y

mo

XX XX X17:OXX: XX: XXX : ' 

17.1

,,.,,.,..17.4,,yyy.Y.y.y.

17.0

: : :x:xxi6,3.:.:,:.:;:xxx 

18.3 ..V.V..V

17,0

16.7

16.7

....... -S . . ... . . . .: . . 

17.6

16.4

 X:XXX'17.3y, v y v y.y,y

18.0

.Y,,,,,.16.5. ;.;.;. .;.;.;.;.;..

x : x: xx:17.0xx-xxxx:x:-:

....y.y17.1y.y.y.Y.Y.YY.

 - x:x-xi6:3 v :x-x-x-v :x

 4x:x. '2"'.'..

4XXX4

4

4 

4 

4

0

4 

0

3.-X.-X--

 4x x x 

0

3 

4

txx- x

4

0

 :f-xxx

1;X X X

44 -- 

2yX

4.Y3::x

3

3 X '

4yy. 3 '

3 

4

4

2::::..

1

2-Y

3,x,x 

-4: xxx

43'''"'

0

4.':.'.'

2 

0

2''XX-:

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Na (Sodium) 

77.7 mg/L 

2.8

RV Rating

78.8 4 

76.2 3 

79.9 3 

79.4 3 

77.0 4

72.0 0

77.7 4 

78.2 4 

79.0 4

77.8 4 

72.6 1

77.7 4 

84.4 0

79.1 4 

72.0 0 

80.0 3 

84.0 0 

76.0 3

72.0 0 

76.6 4 

74.7 2

76.7 4 

77.0 4 

84.5 0 

77.0 4 

74.1 2

72.9 1 

78.1 4 

76.1 3 

76.6 4 

80.2 3

77.7 4 

77.6 4 

75.4 3 

80.0 3

79.5 3 

81.1 2

75.8 3 

80.6 2

62.0 0 

77.8 4 

76.9 4

76.0 3

79.0 4 

76.8 4 

76.9 4

78.6 4

82.0 1 

66.7 0

81.5 2 

77.9 4

(total Phosphorus) as P

: :x x x : x : x: :0,P30-:mg/Lxxxxx x xxx: x: : : : :: 

-. Y.xxx.YXO.01 LY.YX xx. XXXXYX xxx-: xxxx.

RV

0,015 

0.020

 xxx x xx: x0.040xx: : x x x xx

0:030 

0,030

XXXX:XXX0.028XXXY.-XXX

..... ....0.023. ........

XXXyX^Q^XyXX-XXX0.027 

.'' QffiQ

J^S-^

ii|^;;::

y.yXy.yX0.079.yXyXy.yX

XX/XY/XO/O^S' 'xxxxxx

XXYXXX-xO:109y.y.Y.y.y.y

0,040

xxxxxxxo.020-xxx xxx: x

0.025

0.020

:xxxxxxO:017xx-xxxx x : 0,030 

0.030

0.020 

0;020

0.070 

0,032

0:020

Rating

2

xx:xx3xx-. x-;x

X : xx 3-x : xxx:

NR

.....3....Y-...

XXX NRXXX-XXX

x:xx4xxx:xx: : x 

: ,::: * : : : :: ,:: 

x : x xx4Xx: : x xv " 

x: : : xy.3 Xyxxxx:

 :::::--gX-:::;:-:-:;:- 

NR

yyyyOy,.,;.;.;.;.;.

3

X' : :xx3xxx xxx

 x-xx-4x-x-x-x:x 

.. ....^........ .

y.y..Y2XXX.XXX:

.Y.Y.;.;3,,y.Y. : .y.Y. ;

X '. : . : . :P.'.-.-:.-.-:...Y. 

 . * .-XX:.

24
Table 6. Laboratory performance ratings for standard reference sample M-144 (major constituents)~Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; |iS/cm, microsiemens per centimeter; Lab, laboratory number; OLR, overall 

laboratory rating for all reported values; V/16, number of reported values of 16 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Lab

146 

147 

149 

151 

154

158 

180 

190 

191 

196

203 

204 

208 

209 

212

213 

215 

217 

218 

220

221 

224 

230 

234 

235

236 

237 

241 

243 

244

246 

247 

253 

254 

255

256 

257 

259 

263 

264

265 

266 

267 

268 

269

270 

273 

283 

284 

286

287 

292 

294 

297

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

F (Flubride) 

0,23 mg/L 

0:04

.y.y.y.y.vRVy.y.- ' 0,23

,xx,,x-0:21xxxxxx: : 

.. .'.QJ9 . . . .: 

,,,.,, 0.32y.y,XX,

:xx-:xx:oxl2-: x : xxxx 

0.15

XXXX-XX^jX- --" -

1$C!

,'-,v'vO-.2.t v ,,,v,,,

<o.$

,,,-:-,,0.18,:yyXyX

xxx,; 0;26x: x: x-xx:

x-x-x XQ-^-XX ::-: : : 

-,,,,,.0.23XXXXX-

;;' ; 0.22;;;;,..,,

X o:26

.-. ::.. '. :0f 23 '.'. .'..:.-

,,,,,, - 0-. 38 ,,,,,,,. 

0:45

0,29

xxx: xo:20'- :: ": '::: - 

.,-,,,,0.2S,,x-x-,xx

Rating

,,,4:-x-x

x:x: 3:xx: - 

,,,,2- :-:-:,

. xxQxxx:

;'"o. ;.;.; 

o

NR

x-x3: :-:-: ::

xx2y-,x

jn

- :-x:3 :-:-:-:-:-

Nft

 ': : : ::2x,,x

xxxSxxy

;Xy4;.yXy

: :xx3xx-x : 

'" 4 ".'.'.'

,,.4 xxx ","0,xx;

0

,,,2,,,-xXXX2; XyX

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

K (Potassium) 

3.60 mg/L 

0.26

RV

3.76 

3.50 

5.12

4.00 

3.42 

3.42 

3.71 

3.51

3.89 

3.67

1.37 

<5

< 1 

<5 

4.00 

4.80

3.78

3.34 

3.61

3.51 

3.80

3.83 

3.95

3.50 

3.55

4.69 

5.00 

3.49

3.60

3.53 

3.80

3.70

3.75 

3.45 

3.43 

3.74

5.71 

3.40

3.58

Rating

3 

4 

0

1 

3 

3 

4 

4

2 

4

0 

NR

0 

NR 

1 

0

3

3 

4

4 

3

3 

2

4 

4

0 

0 

4

4

4 

3

4

3 

3 

3 

3

0 

3

4

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Mg (Magniesium) 

17:0 mg/L 

0.6

RV Rating

-x-x-x-x-:16,2.xxxxxxxx 

16.0

-x-:-x-x---i6;5XXX-x-x-xx:

" ' ' " ' ' ' ' 15,5-;' ' ' ' ' '" ' ' ' '

-x-x-x-yl8.0xx-x-x-x-x-x

:-;:::;;:x-xiy7,i-x : xxxxxxx 

17.0

16,6

35:1 : -x-, : : 

17.4 ' x-x/x--

: : : x-x:x1-6.6.xxxx-'::: x

-x-:-x-:-x1:7.2x:-x xxx

,xx:,i6.8x: x,x-.. : xx18.0

17,8 xx:-:17:4 -x :-x ----::-:::--

17.0 

16,8

:x,xi7:2:x:-x:x-:-x-x- ,.,,MV,.,V,,..V

y:y,xxl6,3:-:-, ,:,:--::--:

17.5

 , ,x:1-7-3x-x ,x-x-x ,.. 

,,xxx: l8.0-xx--xx--:-:: 

..-,;i.7:1, , ,,

XX-X x18.8,;,,y.v ,y.

-,:-x-x-x-1-7.0,:,-:--:-::-:-::- 

17.1

16.9

-Z.xx 

1

0

4 

2

4--:x

4

3 

4

0

:3::X 

0

3:: X : X 

0 

3

 4-x-x: 

: 2x,x-:- 

:4xxx: 1......

4 

4

2

- 3x-x-x

4

.4-,.,,

4-x-x-:- 

4

2 x

o

3 

4 

0:txx' 

4;.,,.

o

4 -:-:-..: 

4

4,,y,

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Na (Sodium) 

77.7 mg/L 

2.8

RV Rating

81.0 2 

75.0 3 

75.8 3

78.0 4 

79.2 3 

76.8 4 

77.6 4 

81.6 2

72.8 1 

76.3 4

71.3 0 

80.2 3

69.4 0 

76.8 4 

89.0 0 

78.7 4

77.9 4

80.6 2 

79.6 3

74.5 2 

70.0 0

77.4 4 

80.6 2

78.0 4 

80.8 2

72.7 1 

73.5 1 

77.1 4

78.0 4

77.1 4 

79.0 4

82.0 1

78.0 4 

81.0 2 

82.3 1 

79.3 3 

51.1 0

75.0 3 

60.8 0

80.4 3

(total Phosphorus) as P 

0,030 mg/L 

. ,,,,,xxx-0:0l:l,: xxx:-,,: :-:-, , :-:-:-:-:- :- -

RV

: : : : ::-,0,103:-:-:-,,:-:-:-:;,

x-xxxxxxa:026xxxx-xxx:, 

0.024

amg ,XyX-XyX-:Q.027,x-,, ,:-:-:-:-:-:-:

0.030 

xxy:-,x:-Q,027xxx xx :-:-::-:

v x:-x-x-x-<:-0;05X"XXx-:-'-x-x

x-:-:-:-: :-x-:-x0.030: ,,,,,,,,,y.

0,060

v,y,,X:: X0.045XyXyXXXyX

0.027

,,,-,,,,,-0.019: ,x.x-X-X-,,Xiiili

0,050 

0.027

0.025

-Xy'yX;XyX0.068yXXX:XXy,X

0.040

x-xxx Oi032 - - - - 

Rating

x-,,0:-x-,, :x

v.v.vjj.y.;.;.;.-.-.-.-

x-x: :4: xxxx: x: 

....3.'......,,..

MR

XyX3y,X: X-Xy

 x-x-ij:----;.-.::-:-:

.....4......... -x -4x-:-x x-x-x

NR

0 "'"

0

: x: : : :2X:XyXy:y.

4

:xxO: xxxxxxx 

NR

,x-:-1-,x-x-x-,xx 

..4.....'...'...

x-:4x-x-xx :-:-:

 x : xb:x: x-:;x: x 

NR 

3

NR

y,,4yX: X : ,yX

25
Table 6. Laboratory performance ratings for standard reference sample M-144 (major constituents) Continued

(MPV, most probable value; |ig/L, micrograms per liter; mg/L, milligrams per liter; nS/cm, microsiemens per centimeter; Lab, laboratory number; OLR, overall 

laboratory rating for all reported values; V/16, number of reported values of 16 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

11 

12 

13 

15 

16

18 

19 

23 

24 

25

26 

30.1 

30.2 

32 

33

34 

38 

39 

40 

42

43 

46 

48 

51 

57

59 

64 

68 

69 

70

76 

83 

84 

85 

86

87 

89 

96 

97 

100

102 

105 

107 

118 

119

121 

127 

134 

136 

138

140 

141.1 

141.2 

142 

145

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

pH.YXX;XX;X;X;XY: 

8,40 

0:17

.Y.Y. RV

8,12

: : ;XXX-.8.63V - 

8.55

8.34 '-;-; ;; ';8.2o; ;;

8.42

8.27 

8.48 

8,50 

8.40

....... 8>45.Y.. xx

8;30

YXYX.8.46xxx:::

8.50 

.::::: : 8,51 x 

9-19

8.38 

8:02

 XYX;X8.2ox;xx:: :

8.1 0

8.23

;,,;,8.37.;.Y.;,,Y

x: :x:X;^48xxxx::

::::8:.5ixxxx

Y.XX:8.43;.YX;XX

8,28

;xxxx-8;38xx:xx

' ' ; ;;;; 8.50.;.;,. ;.;:.;

8.55

x-x-XY.8.53x: x xx x

'.'.'".'.':&M.- .....

8:16 - - 

: : : : : :-: 8..44-xxx : 7.80

Rating

x-x-Xgxx4

xx : X;4:xx

;XXX4;XYX

;; 4.

4

XXX-.4XXX-

;;;;;;;; 4..;;

XXX-.4XY,;

4

X;X;X4 YX;X

'::' *:: ;

 ,,,:::?::x-x

;X;X;.;4;X;XY

;X;XX4 -x

xxxx4xx::- ' ' "3 '"

4

;,:X-4.;X;X;

x:x-.4:::::

Yxx:-4x xx:

...... 4. .Y.Y.

;XXX4x:-xx

X : XX4X:XX 

 XXX'4.;-;;;-;

Y : xx4;xx: :

''..'.3;;;.;.

.Yx2x-x:

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

SiO2 (Silica) 

7.43 mg/L 

0.50

RV

7.30 

7.99 

7.45 

7.30 

7.60

6.16

7.59 

8.18

6.31

8.03 

12.10

7.95

7.90 

7.51

7.29 

7.12

7.60 

7.56

7.84

7.27 

6.86

7.09

6.91 

7.50

7.03 

7.61

7.33 

8.08

6.40 

7.79 

7.36 

7.47 

7.00

7.16 

7.01 

7.76

7.39

7.25

8.37 

7.48

Rating

4 

2 

4 

4 

4

0

4 

2

0

2 

0

2

3 

4

4 

3

4 

4

3

4 

2

3

2 

4

3 

4

4 

2

1 

3 

4 

4 

3

3 

3 

3

4

4

1 

4

Rating Absolute Z-value 

1 (Marginal) 1.51-2.00 

0 (Unsatisfactory) greater than 2.00 

NR (Not Rated)

SO4 (Sulfate) Sp Cond 

210 mg/L 853 nS/cm

XXX'-X-XXX8..Y'-XXX.XXX:X ' XXX:: 21

RV Rating RV Rating

210 4 857 4

195 1 856 4 

199 2 868 3

203 3 806 0 

217 X 3 861 4

211 4 841 3

220 2 594 0 

211 4 863 4

209 4 864 3 

182 0 848 4

209 4 795 0 

204 3 858 4 

238 X 0 662 0 

269 0 858 4

199 2 847 4

213 4 860 4

;;^':;.;;208: ;;.Y.,YY: ;._.;.. 4;.Y...::

;.;.;.;.;.;X;X2iO:;XYXYXX;x;:4X;:::X' 814 1

206 4 800 0

203 3

,Y.;.;.Y ;.;.;... Y.YY..;.;XY.YXXXYXXX;. 8g4 3

220 2 810 1

;.;;.;.;.;.;.;.;.;,.. Y.Y.Y.Y .Y.Y.- Y.Y-. - g5Q ^ 

n.-iC ....... .Y.Y. '. YQ.Y. :.:: oco A ZTo o 852 4

209 4 853 4

X;X;X.;X2l6-': xx x' : x xx-x : 3xx: xx ' 856 4 

867 3 

225 1 853 4 

180 0 830 2

193 Q 859 4 

213 4 860 4 

192: 0 9 0 

197 1 

199 2 781 0

 xxx 212 - - - 4 - -

 x-x:xx.-2ioxx-xxx: ::::::4:::::x

206 4 846 4

xxx x x;:2itxx:xx:xxxx4xxx ' 855 4 

215 3 885 2

207 4 414 0

204 3 847 4 

215 3 857 4 

225 1 850 4 

210 4 853 4

250 0 874 3

191 0 834 3

 X-. XX ::. : XY -- -Y..'- ; --. ' " x 842 3 

860 4 

210 4 858 4

212 4 862 4

210 4 850 4 YX: :XXX:X : ' : :X:::::': ::::::X': XX : -''::' 757 o

212 4 834 3

214 4 865 3

228 0 870 3 

197 1 

214 4 862 4 

208 4 847 4

Sr (Strontium) V (Vanadium) 

673 H9/L insuff data

RV Rating RV Rating

654 3 3.30 NR

678 4 2.00 NR

,::: : :.,,692xxx:::xx:x: 3:x;XXY < 4 NR 

666 4 <10 NR

:;.;-;X;X648YXYXYXXX.3.YXY.Y

X;XYXYXYXXX--XXX:X-XXX- x-x-x- < 50 NR

 x-:-x-:-.'X;::x-x;::x: xxxxxxx: x:x: < 0.01 NR 

629 1 4.90 NR

627 1 <5 NR

726 1 <4 NR

<6 NR 

681 4 2.20 NR

' : ;x;x:x64o;;;;3;;;;';;;;;.;2 ;;..;' <i NR

..;.Y.Y, V 637.;.;.;.Y.Y.YXXY2.XX;X;

<2 NR

2.80 NR 

1.00 NR

<100 NR

650 3 < 1 NR 

686 4 < 50 NR

ssps

9.74 NR

.Y..Y...550xxxY,xx.xo-xxx: 

685 4 <10 NR

690 3 2.00 NR 

672 x 4 <20 NR

656 3 <3 NR

-:::::::: 675:x::::x:xxxx4'x:Xv < 1 NR

158 0 2.60 NR 

675 4V 1.23 NR

''^Z ::: : :: . . .'xXX <1 ° NR

681 4 7.16 NR 

674 4 8.00 NR

26
Table 6. Laboratory performance ratings for standard reference sample M-144 (major constituents) Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; nS/cm, microsiemens per centimeter; Lab, laboratory number; OLR, overall 

laboratory rating for all reported values; V/16, number of reported values of 16 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Lab

146 

147 

149 

151 

154

158 

180 

190 

191 

196

203 

204 

208 

209 

212

213 

215 

217 

218 

220

221 

224 

230 

234 

235

236 

237 

241 

243 

244

246 

247 

253 

254 

255

256 

257 

259 

263 

264

265 

266 

267 

268 

269

270 

273 

283 

284 

286

287 

292 

294 

297

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

pH

 ; ; ;;; ; ; 8,40;::::;;.

xxxxYxRVxxxx8.42

8.40 

8.40

8.38 

::: 8.54 -"

xY;x: :8.20 :::xx ::

8.61

8,20 

8,55

8.20 

8,40

8-45 

8.50

8.51

8.51 8:47 '':'::

xx:: x: 8.3ixx::xx:: 

-,, .Y..8.25XYXXX 

8.47

8,13 

 . .-.-.8-51;.;.;. ,,;.;.;.;

X 8,54

.Y.Y.,.7,75xxxx: 

';;;;'; 8.25" ;x.x;

8.30

,.-.xxx:-8,2&xxxx:

8.30 

8,30

XXXXX8.90;:XXX:

8.02

8.45

....... 8.23.Y.;.;.;.,.;

xxx-x-8.40xx: x :Y

Rating

. ...4, . ,

xxx:4 : :: : 

'' Y,4V.Y..

xxx4Y: x ;

4

. --X-4X-Y-:

: xx: : : 4: : :: : : 

.xxx 4 : ::: :

V. V 4...v ,

YYY.AY.Y, x-::x4 - 

YXXX4XXY'

4

XXXX4 Y X -

Y.XX-.4-XX-: 

4

3

xx-x-4xx: :

4

X..XXlX: XX

 'Y-AY.Y.-. 

X;X;X4X;X;X

xxx:4xxx- 

;xxx-4x:xx

.YYY4'.YXX

' ' ' "3" "

4

xx; x:4xxx

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

SiO2 (Silica) 

7.43 mg/L 

0.50

RV

7.20 

6.90 

7.70

7.68 

8.21

7.26 

8.09

7.70

5.19 

7.08

7.43

5.60 

6.86

7.78 

8.77

7.20 

7.44

7.00 

6.60 

6.40

7.30 

6.60

6.65

7.40 

7.71 

8.33

7.71

Rating

4 

2 

3

4

1

4 

2

3

0 

3

4

0 

2

3 

0

4 

4

3 

1 

1

4 

1

1

4 

3 

1

3

Rating Absolute Z-value 

1 (Marginal) 1.51 -2.00 

0 (Unsatisfactory) greater than 2.00 

NR (Not Rated)

SO4 (Sulfate) Sp Cond 

210 mg/L 853 u.S/cm

.....'......'.. 8.. ................... 21

RV Rating RV Rating

X;XX;X;X224X; XYX;X;XYX;lYX;X;X; 745 0

220 2 938 0 

210 4 835 3 

215 3 869 3

219 2 865 3 

216 3 797 0 

210 4 857 4

201 2 845 4

216 3 866 3

55 0 844 4

203 3 831 2

220 2 889 1

206 4 800 0

..... .Y. ..Y..Y.Y.Y.'. -'. Y.Y.Y XXXX. Q Q

" ' ' 215 v.s'"^

209 4

217 3 840 3

.;.;.- ..... 213 '" ' ' ' ' " 4

214 4 865 3

213 4 861 4 

216 3 690 0

X;.;X;;.YX;X;X;XXX'-XXXXX-XXXX, 543 4 

;XXXY.YXX;X;XXXX;X;XXXXXXX 852 4

205 3 800 0 

187 0 878 2

205 3 850 4

YXXX;XXX;XXX;X;X;X;X;XXXXXXXX Q54 Q

215 ..... Y-.-...3Y.Y.. 904 0 

221 2 851 4 

216 3 874 3 

208 4 863 4 

209 4 849 4

xxxxx212xxYXXY.x,.4xx.Y 

214 4 868 3 

860 4

xxxx215-: xxxx: - :: xx3x; xx 

857 4

920 0

:;;.;.;,,.;;;;.;,.;:::;. ,::: : ;.;.; ;:.;;.;.:: 875 2

199 2 873 3

<5 0 854 4 

204 3 844 4

165 ........... ..O.Y.Y.-.. 773 0 

205 3 853 4 

216 3 850 4 

103 0 830 2

Sr (Strontium) V (Vanadium) 

673 u.g/L insuff data

.'.'.'. Y.YYY. 27-'. Y.Y. Y.Y.Y. .YY YY.Y.

RV Rating RV Rating

<0.01 NR 

636 2 1.10 NR

599 x 0 7.70 NR

2.60 NR

 ::: : ::x-xxx^xx:x;xxx:x-xx-xx < 4.67 NR

640 2 < 10 NR

15.00 NR

^::'^:^:^^^o'--:--.. <o.oi NR

9-90 NR

660 4 2.18 NR 

680 4 2.29 NR

655 3 3.00 NR

681 4 <10 NR 

679 4 8.00 NR

V Y.;X;X: .680;.Y:Y.YXYXYX4X;XY.

669 4 <3 NR

 xxx 66QXXxxxxx-x--- 4- 

677 4 1.60 NR

720 1 <12 NR

706 2 <20 NR 

1001 0 250.00 NR

27
Table 7. Laboratory performance ratings for standard reference sample N-55 (nutrient constituents)

(MPV, most probable value mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/5, number of reported values of 5 possible values; RV, reported value; <, less than

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2. 00

Analyte = NH& as:N: NH3 + Org N as N NQ3 + N02 a$ N total P as P PO4 a$ P 

(Ammonia) (Ammonia + Organic N) (Nitrate + Nitrfte) x > (total Phosphorus) (Orthophosphate as P) 

MPV = ' ' ' ' ' 0:240 mg/L 0.300 mg/L 0.443 mg/L . 0.602 mg/L .6:580 mg/L . 

F-pseudosigma = ; x ;Q,024 0.1 10 0,033 0.032 0;026

Lab

1 

5 

9 

10 

11

12 

13 

16 

19 

21

22 

23 

25 

33 

38

39 

42 

45 

46 

48

51 

53 

57 

59 

69

70 

76 

84 

86 

87

88 

89 

90 

91 

96

97 

102 

105 

107 

110

113 

114 

118 

127 

134

138 

140 

141 

142 

143

145 

146 

158 

180 

185

OLR

3.0 

2.7 

3.6 

3.8 

2.6

1.8 

3.3 

2.2 

3.0 

3.2

4.0 

1.8 

3.0 

4.0 

3.4

2.5 

1.0 

3.0 

3.5 

1.6

3.4 

2.0 

1.6 

4.0 

4.0

3.0 

4.0 

0.0 

1.5 

2.6

0.7 

3.8 

3.7 

2.7 

2.6

3.6 

3.4 

2.8 

3.8 

3.0

2.8 

3.5 

2.6 

3.2 

3.4

3.8 

2.2 

2.2 

2.8 

2.5

2.6 

3.2 

2.5 

3.6 

1.8

V/5

5 

3 

5 

5 

5

4 

4 

5 

4 

5

1 

4 

4 

1 

5

4 

1 

1 

4 

5

5 

2 

5 

5

1

4 

1 

2 

4 

5

3 

5 

3 

3 

5

5 

5 

4 

4 

1

5 

2 

5 

5 

5

5 

5 

5 

5 

4

5 

5 

4 

5 

4

RV

0.213

x : x : ' :6:252-x: x: : 

0,217 

0.240

p;25o

0.200 

0,240 

o:i5Q

0,200 

0 23i

0.446 

0.210 

6:230 x 

0,250

0.184

:x';;0;2i7v:' X ' : 

0.150

0.240

:0,230 

0.250

0;245

;;;;'; o;234::;;

0,265 

0240

0,172 

0.250

: : :v:-0.242>:vX

b;230 

0,223

0:248 

0,243 

0.220

;::: ::Q . 229-: :-:-::

0.223

0,236 

0 220

0270 

0.215 

::: x 0;255

0.240 

0,300 

0:278 

0,289 ' ' ' ' 0.171

0,260 

0.241 

0.168 

0226 

0,264

Rating::

 2 ..:::. 

: : x: x:x: 3: x: : : x: x

vx:x::3:-x::::- 

......... ^ ....

XXXXv--4X-X-X

/ :::-: ;:-1 :-:-:::-:: """4"" 

::::::xox: x:: x:

. . .-. ...I.-.-...-.-. 

Y.Y.Y.Y.YJ.Y.Y.Y

- . .. 0-..,... v. ' ' "' ' ' ' 2 ' ' " ' ' 

''-' ' ' ': : 4xxx: : 

........ 4. ,.-,,,.

0

 : : : : :-: ' 3 " ' ' ' ' '

xxxXx-OXxXx

.,.,,,...4,,,,,. 

,.:x:x-4.:XY.:

3'. civ X

.. . .: . . A - - - 

';;;;;; 4.;::;;;

 : :-:-: : x. 2 x-x:-x 

"" ...4 . 0

Y.Y.Y.Y.4,.Y,, XXXXX-4X-X---'

 x-XY.-x4Y.YXY .'.'.'.'.V.V3V.'.'.'.'.

:-x-x-x-:-4'xx:-v

 :-XvX: x4: ::x: 

'^ '3 - . ' ' '- ' ' ' ' 4 ' ' ' ' 

XXX-XXSX-XYX

........4...... : : :-: x:3 - : :; 

x:x::v2x: x: x:

^'- ' 3 ;-,;.

x-x-x-xs-x:::-

:-x:x:x4x:::x 

0 

x :::x: :-ixXYX

......../tXxxx {jv --;;-

X-.Y.-.XS : : 

.- . -4.- - -.:

'.xx X'.Q ::::.:

:x: x-: : x3x;: '" 

: :-: ;:-: :-. 3 :: ::

RV

0.265

0.300 

0.300 

0.180

<0.3 

0.350 

0.305

0.210 

0.220

<0.2 

0.430

0.300

6.500 

0.300

0.293 

0.500

0.380 

0.302

0.416

0.330 

0.220 

<1

0.603

0.300 

0.264 

0.281

0.310 

0.340 

0.465 

0.307

0.260 

0.267

0.293

Rating

4

4 

4 

2

NR 

4 

4

3 

3

NR 

2

4

0 

4

4

1

3 

4

2

4 

3 

NR

0

4 

4 

4

4 

4 

2 

4

4 

4

4

 : : : : : : : : : RV:

0.464 

0.423 

0,457 

6.450 

0,420

0.380 

0,450 

0.352 

0,460 

0.631

0.471

 X-X-^SYYY

0.451

0.443 

0.495 

0:466 

0,431 

0.560

0,420 

0.315 

0:420 

0.430 

0.450

0.330

6.550 

0.380

0:510

0.599 

0.450 

0.471 

0.360 

0,408

0.460 

0.410

0:430

0.432

0.420 

0.430 

0,410 

6.497 

0,438

0.430 

0.413 

6.324 

0,465 

0.440

0,460 

0.467 

0,441 

0.445 

0.438

: vRatihg X

. .....3....... x-:-x-XY3:-x-:-:-xx: x; ::x:4: x; :;x:

 :-::x-:::4v.;.: .v.: 

,.,.. . £., -,

x/.x x-:-1x : :-: 

..... .4.,.-,. .v.. xxx0x-x-:-

::: x : x : x3x: x: x 

0

. X'X-XvSvX-X'

;;::;:.v.3V.v:.;:.

:x::-x:-4-x-:-:x:-

4....v.. 

:: - -x:xfv: :: : 

::x:xv3xX:X.x .'.' .'.'.'.'4.'.'.'.'.'

;.vXv: : v0XvXxX

 x-.-x;:-:3.:xx-:-. ' ' ' ' v" v Q 

::x:x;3: : :x:x: 

,,,,,,,,4.-.-.-.-.-. 

 - --- - - 4- - '

...... ,.Q -,,-.,,

'^;"'''o' vv;:

x: x-:1 ::x:

0

X-X-Xv.4: X;X: X : 

3

Xvx: : : :;0 ::: : :;

x:x-x-:-2.:x-,,- 

....... -....

XvX-x:3x:x:. 

-. . . x-X4x-::x-

.;;;.;. 4.;v:,v.

 . ::-xx-.3: :-:::-: ''i'^'4^" 

x::--x-:3X-x:-

 ::x:x: :1:x- : : : '.'.'.'...'.'.4...'.'.'..

. :,. . -3 .-.-. -.-,.-.

,,,,,,. V QV.V.V

 x : x:x: :3:: x:x: 

x :x:4xxx:

 3...... 

x:x:x: 3; x: x: x 

:x:x-:4x-:x-x4

 x-x:--'4X-::x:

RV

0.557

0.610 

0.602 

0.630

0.560 

0.620 

0.633 

0.590 

0.608

0.591 

0.620

0.636

0.602

0.600 

0.630

0.595

0.550 

0.600

0.607

0.760 

0.634

0.600

0.610 

0.562

0.590 

0.608 

0.520 

0.581

0.593

0.760 

0.612 

0.568

0.620 

0.540 

0.590 

0.587 

0.587

0.640 

0.630 

0.584 

0.632 

0.677

Rating

2

4 

4 

3

2 

3 

3 

4 

4

4 

3

2

4

4 

3

4

1 

4

4

0 

3

4

4 

2

4 

4 

0 

3

4

0 

4 

2

3 

1 

4 

4 

4

2 

3 

3 

3 

0

XvX-x-'-'RV:::-::

0,574 

0.612 

0.563 

0.565 

0,540

0:560

0,619 

0.574

0,570 

0.580

0.630 

°^80

: ::x:0;572:x: x-:

0.545

0,600 

0.600

0,546 

0:587 

0,500 

0.570

0.716 

0,560 

0:579

0,609 

0:590

0,571

0.566 

0,602 

0.580

°-^o

0,561

0,590 

0:583 

0,592

0.570 

0,600 

0.590

o:eio

Q.55T

0,530 

6:544

x-:::-o-554x::-:: 

0.575 

0:674

X Rating:

.-...-.-.-.v 4. : : . - V2'-' "' ' 

x:x-x-:-3 : : : : - 

 .v...v.;.3:Xv,,

-.-. -1 -.

:::x-x-:-3Xv-v/ 

-. . .... ,.2v.-.-.,. ' ' '' ' ' ' '-4 ' '"' 

: x::: x: :-4-:: x: ' : - : 4

x: : : :x: x: 1 : x::: '::: 

-x-:-x;x4-x-x-.'.

-x;x:: x4 ::: : x

:xxxx2v.x,-

.. v'-.3-.-,,.. 

 V 3 - 

: :-: : .v>2,x::-

,.-..v'v4.,,,,,

-x-:: Q - - 

'.'.'::.'.'.'.b'. .".v.

:x:x-X3 - - 

:X: X: X: 4X;X;X;

... 2

: x: x: x: x4: x : x : x

: x: x:x.4: : : x:x: x

. . . . -. 3xxxxx '" ' ' ' ' -3- ' ' ' ' ' ' ' 

x-:vx;x4x:x : : : ' : 

 . ,,.-,.-.-4.. .-,.,.

:-:- x : 3 : ::,.-

4'"'"

: :vx: : :::4:; x : ' : : : x 

. .-. . . .4:xvX4

 x:x: : :x:3x:::x 

4 ' ' ' "-' ' '2V - V ' V - V 

::x-:-:::-2,: : XxX:

v.-...-.-:.1.-XvXv 

-,, ..:. .. - --. -

. ; .x ; .x-x3Xxxx-

:::-:-. x :4., x: 

0

28
Table 7. Laboratory performance ratings for standard reference water N-55 (nutn'ent constituents) Continued

(MPV, most probable value mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/5, number of reported values of 5 possible values; RV, reported value; <, less than.)

Lab

190 

191 

200 

203 

204

205 

208 

209 

212 

213

215 

221 

224 

227 

234

241 

243 

248 

253 

284

285 

287 

290 

291 

292

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte =

MPV = 

F-pseudosigma =

OLR V/5

3.2 5 

3.0 2 

2.3 3 

2.8 4 

4.0 5

2.0 2 

4.0 2 

2.0 2 

1.8 4 

4.0 2

2.0 4 

1.4 5 

3.4 5 

2.0 5 

3.0 4

3.4 5 

3.7 3 

1.3 4 

2.3 4 

1.6 5

2.0 5 

0.0 2 

1.8 5 

0.0 1 

2.8 4

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

NHjasN 

(Ammonia) 

0.240 

0:024

xxx: XRV

0.249

0,260 

0.224 

0:239

0.341

0.243 

0,360

0.220 

0.306 

0,254 

0:130 

0.273

0.233

0.400 

0.225 

0:232

0.275 

0.220

rng/L ......

Rating X

......... -4. Y.Y.

.;.;.;.;,.,;.;.;.;.;3'.;.;.;.;.

''..'.. ...3...'.'. 

xx : :xxx;:-4x:x

..... ;.;,,..Q;X,,;. 

. .-.Y.Y.Y.Q.-..Y-.

NR

.;.;.. y.;.;.;.;.;.;3. ;.,;,.

 " '-' - ::3":.v.

x:x::x: x :x: o xx'

xxx:xxxx :2xx-:x

............4.... 

vX: xxx:x-4X-x-:

..-.-.-.... v.-0..:v

:xxxxxx; :4x.x:

xxx::xx:4x:x:

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

NH3 + Org N as N NQ3 + NOj as N : : X 

(Ammonia + Organic N) (Nitrate + Nitrite) 

0.300 mg/L X 0.443: ffig/L 

0.110 0,033

RV

0.572 

0.284

<0.5

<0.5 

0.628 

0.327 

0.190

0.440

0.517 

1.720

0.284 

0.090

Rating

0 

4

NR 

NR

NR 

0 

4 

3

2

1 

0

4 

1

RV

0.436

0:420

0,300 

0.466 

0,452

0.458 

0.445 

0.204 

0.510

0,430 

0.476 

0.453 

1.054 

0.432

0.458 

0>450 

0.189 

0,381 

1.280

0,572

0,690 

0.10O 

0.430

Rating

 . X4.V.-X

,Y.3xXX0

"..A....

o

A

-: x'4 . 

:x-:1:xx: 

0

0 

0

-x : :4.y.: : : :

total P as P 

(total Phosphorus) 

0.602 mg/L 

0.032

RV

0.586

0.568 

0.613

0.560 

0.600

0.660 

0.589 

0.605 

0.619 

0.630

0.597 

0.570 

0.642

0.718

0.709 

0.195 

0.630

0.750

Rating

4

2 

4

2 

4

1 

4 

4 

3 

3

4 

3 

2

0

0 

0 

3

0

po4 as P - ; - ; - : ' ' '- ' - 

(Orthophosphate as P) ;

0.580 rrig/L

x:xx0vq2gxxxxxxxx-xxxx

X XRV

0.573 

o:6bd 

x 0,570 

0:556 

0.589

0.588

0,590 

0:570

0,640 

0.300

0:580 

0,600

0.564 

0.596 

0:582

0,579 

1:730 

0,620

0,594

XX Rating:

4

x:x : x-:x:x3:x:-x'x-

. .-.v.-.-,,.-:,.4.v,,.-.

.... Y . . . -. . -. . 

:x:xxxx: x: :4x:XY:x

x:x:-xx'-x:- 4 -xxx-:

^' '-' -.. ' ' 0 ' .: :-: 

.Y.Y,XXXX.3XXX-

....Y.Y.Y.-.SY.Y.X4

XyXXX-X- Q

X; :XXXXXXI':XXY. 

:xxxxx.: :x3XYX:x-'

294 1-5 0.370 0.380 0.580 0.550

29
Table 8. Laboratory performance ratings for standard reference sample N-56 (nutrient constituents)

(MPV, most probable value; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/5, number of reported values of 5 possible values; RV, reported value; <, less than.)

Lab

1 

3 

5 

9 

10

11 

12 

13 

16 

19

22 

23 

25 

30 

33

38 

39 

42 

45 

46

48 

53 

59 

69 

70

76 

84 

86 

87 

88

89 

90 

91 

96 

97

102 

105 

107 

113 

114

118 

127 

134 

138 

140

142 

143 

145 

146 

158

180 

185 

190 

191 

196

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte =

MPV = 

F-pseudosigma =

OLR V/5

3.2 5 

1.2 5 

2.7 3 

3.2 5 

3.6 5

2.8 5 

2.4 5 

2.8 4 

2.6 5 

3.8 4

4.0 1 

3.4 5 

0.8 4 

2.0 2 

4.0 1

3.0 5 

2.8 4 

0.0 1 

3.0 1 

2.4 5

2.0 5 

1.0 2 

3.6 5 

4.0 1 

3.6 5

4.0 1 

0.7 3 

1.8 4 

2.4 5 

0.0 3

3.6 5 

3.7 3 

3.0 3 

3.4 5 

3.8 5

3.0 5 

2.8 4 

3.8 4 

3.0 5 

0.5 2

1.4 5 

3.0 5 

3.2 5 

3.0 5 

3.2 5

2.4 5 

4.0 4 

1.4 5 

3.2 5 

2.8 4

2.4 5 

2.0 4 

3.4 5 

3.0 2 

3.5 2

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

NH3 as.N 

(Ammonia) 

0.498 

0,034

 . : : : . RV

0,465 

0.590 

0425 

0:444 

0,490

0.520 

0,500 

0.510 

0398 

0.500

0:500 

0,840

0,500

0.606 

0,344

0^481

0,350 

0,500 

0.489

0.508 

0,450 

0.497 

0,470 

0.427

0.520 

0:489

o;48o

0:516

0,527

0.500 

Q,510 

0.490

J-M

Q.550 

0.443 

0.514 

0:480 

0.520

0.540 

0,483 

0.540 

0.49$ 

0.417

0,4$8 

0:484 

0,513

rrig/LX XXXXyX

Rating

v.v.v.-.v.v. -3:::..

v.v.v.v.v Q '

x: x: :xx : x : &

-' : : . Iv-.-.v

X-x.'.v.v.Y. 4-.,,,.-

 : -: : :-:-:-: -:;: 3 ,. :

.Y.Y,.Y.Y.v4..Y.-. ' ; ' : ' : .V:.'':: :4V.'. 

:x:x:xxx:: 0x: x: 

v.v.v.v.v. 4 x

 :xxx : x: x :X4-.; x: x

y.y.y.y.y.yO.YXy 

y:: XyXyXy4,yyy

 ...Y.-.Y...vO.-...Y : :-:: : : ' ' ' O'' v ''

XXXXXXX^XXX:

::-.-:' -xxxo.xxx

XXXXXXX4XXX 

 v VY.4.Y..Y ' "" '- 4

XX: XXXXX2XX: X .'.'.'.'. '4..

XXX;XvXX3XXX

0

.... 3 

x x . XXXX4XXX-.

'" :::::.. 3..

X;XyXyX: x3 xx:

X; :yXyXyX3'Xyy

...........4..... xxx'-xx- 4-xx-:

Xvxvxxx-:4x: : : x

.vvvv'v.v3,,.X

xxvxxxx.txxx

,.vvv..'v1.v.vv - xx - 4 - - 

vXXX-,:X3;XvX 

3

..... 2 

xxxv,xxx:4xxx: ''''^^^JT'v

y.y.y.y.-.y.;4.Y.y. : Y.Y.Y.Y.YXO.Y.Y:-

........ '.'.'.'.it 1 . 1 . 1 . 1 . 1 . 

x:xv--------4------- 

xxxxxxx:-4x: xx

Rating Absolute Z-value 

1 (Marginal) 1.51-2.00 

0 (Unsatisfactory) greater than 2.00 

NR (Not Rated)

NH3 + Org N as N 

(Ammonia + Organic N) 

0.750 mg/L 

0.097

RV

0.659 

1.100

0.780 

0.750

0.800 

0.600

0.750

0.690 

1.560

0.720 

0.560

0.740 

0.800 

0.757

0.770

0.780 

0.694

0.727 

0.710

0.650

<1

0.987

0.860 

0.812 

0.782 

0.820 

0.730

0.825

0.670 

0.649

0.754 

0.914

Rating

3 

0

4 

4

3 

1

4

3 

0

4 

1

4 

3 

4

4

4 

3

4 

4

2 

NR

0

2 

3 

4 

3 

4

3

3 

2

4 

1

NO3;+ NOS as N. 

(Nitrate. + Nitrite) 

0.747 mg/L 

0,064

RV

0,727 

0.560 

0.730 

0:808 

0,760

0.720 

0,760 

0.704 

0;681 

0.780

0:790

0:800 

0.733

0.786 

0,733 

0.520 

0,791 

0.779

x 0,$20 

0.918 

0,710 

0.760 

0,670

0,895

0:520

0.840 

0;968

0,790 

0.75S 

0.670

6.750

xxx:0y7r0vxxxx>:

0.700 

0.700 

0.702

vx: x0v736--:xvx 

1.860

0,720 

0.747 

0,580 

0.760 

0,626

0.782 

0,765

0:570

0,767 

0.744

0,708 

0.745 

0.736 

0.710 

0.697

XvX X X X total P as P 

(total Phosphorus) 

: 0.715 mg/L 

0.035

Rating

:x:4xxx: 

..-. . j.:-.::- 0

:xx3-xxx 

4

4

XX4XXX'

 v3xvx-:

.v.^-v.-.v.

: :X3X:'X

"3'^'

vX3vX;X: 

4

x-;3;xxx: 

4 X::Q-;::::

v.v3X..v.

4

2

o

..'3....:

::: 4x ::: 

x;2: : : x::

0

 ,X:Q:XXX 

2

Xyo:-::::

...3v.vv - : £.: : : :

xx2.xxx:

...4.... 

Xv4xxx:

:-.-.-3x:x: 

.V.3.-V.V.

.;,.-;.;.;,. .

x: 4xxx: 0

4

; .y.4.v.;.y

0

:/ * ' ' ' ' 

XX1XXX;.

...3....v 

:x 4vxx:

xxOx^x ::.4'vv.

 . . .4.-.-..-.-

. x3 :-xx

v-,4,:::v

" V 4V ' V - 

x: x3x: xx 

3

RV

0.688 

0.760

0.713 

0.745

0.730 

0.660 

0.720 

0.749 

0.710

0.714 

0.680

0.729 

0.690

0.748

0.790 

0.700 

0.726

1.050 

0.775

0.730

0.730 

0.674 

0.720

0.687 

0.610 

0.716 

0.712

0.980 

0.706 

0.702 

0.760 

0.700

0.699 

0.713 

0.780 

0.724 

0.700

0.658 

0.796 

0.700

Rating

3 

2

4 

3

4 

1 

4 

3 

4

4 

3

4 

3

3

0

4 

4

0 

1

4

4 

2 

4

3 

0 

4

4

0

4 

4 

2 

4

4 

4 

1 

4 

4

1 

0 

4

PO4 as P X X 

(Orthpphpsphate 

: ::0:658 mg/L

^xxxWOvx^xx

RV

0,630

0.660 

0.656

: - ::x :xd:643: xxx: : : x: 

x 0,641

0.560 

0,620 

0:377 

0,659 

0:650

0.650 

1:007

XXXX0.981X:XXXX

0.658

x:xxO,650xx:;xyX 

0.500

0,660 

0:690

Q^o

 xx-:-o;gS7xxxxv:

0.795 

0:640 

0,690 

0.766

 xxx:>0,670vx;xxx 

0.646

&.m . 0:642 

0,650 

0.644 

0:649 

0.720

0,560 

0:682 

0,666 

0.640 

0;650

0.722 

0,643 

0:610

xx::>0,616-.x:xx:-x 

0.631

0,744 

0.786 

0,658 

0:630

. : xyx-o:647-xxx-:.x

asP),

Rating , £. ,,,. .

 ::.4-:-::x- 

 ,.v4.v -

xx4-:->: 

:.. 3-,-xx:

0

xx:2x:xx

xxO.xxx 

.'.'.'.4.V.... 

XX4-X--

\',,4- .-. .. 

Q 

:x:0x: x : x4

Xy.4: X; XyX

0

4

v. 2 Xv.y:y

x,4x.x: x 

xx4:xxxx

0

x:v3X: x : : : x :

2 :.v.vX

 X-'Q-XVXX;4>XyX-:-

xx-4xxxx: 

4

3

.. X4: XXX- '''.'.'4;;;;:.

Xv 4-:x:x 

: x-:1x: x: : : : ; - ;

0

 v:-3 :: : : : '

 Xv4xx:x-:

."$:. .-.: 

xx-4 xxxx

 . .-.-Q:;..x-:

...4.v::.v.

x-, 1; .v.v,. 

x; x2: : ; xxx : 

3

0

XvOx^-:-:

.V.-.4.V....

 XXgX-X'--

: xx4 : x: x:

30
Table 8. Laboratory performance ratings for standard reference sample N-56 (nutrient constituents)-Continued

(MPV, most probable value; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/5, number of reported values of 5 possible values; RV, reported value; <, less than.)

Lab

203 

204 

205 

208 

209

212 

213 

215 

217 

221

224 

227 

234 

241 

243

253 

284 

285 

287 

289

290 

291 

292 

294 

297

302

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte =

MPV = 

F-pseudosigma =

OLR V/5

3.0 4 

3.6 5 

2.5 2 

3.0 2 

2.0 2

1.6 5 

3.0 2 

2.8 5 

3.0 5 

2.2 5

2.8 5 

0.4 5 

2.5 4 

2.2 5 

2.7 3

2.3 4 

1.4 5 

1.6 5 

0.0 2 

4.0 5

1.2 5 

0.0 1 

1.8 4 

2.3 4 

0.2 5

1.3 3

Absolute Z-value 

0.00-0.50 

0.51 -1.00 

1.01 -1.50

NH3 asN 

(Ammonia) 

0.498 

0:034

.....Y-XRV

0,466 

0.520

OvSQi

0.990

0.470 

0,500 

0:445

0.250 

0:494 

0.543 

0:480

0.441 

0.508 

0.440

0.487

0.470

0>480 

0.730 

0:745

0.500

mg/L ..........

X X Rating

3

0 

NR

XX : X;XXX: :3;:;X 

..V........4 ..

;.;.;.;.;. .;.;.;.;; 4.Y.;.;.

1

;.Y.;,,.;.Y.Y,4.Y. : :Y

... xxx4 ..::.;.

3 .

,Y.YXXxx-3xx-x 

. . Q

:.;.;.; ;. VY,,4,.Y.;.;

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51-2.00 

greater than 2.00

NH3 + Org N as N NO3 +.ND.J as N 

(Ammonia + Organic N) (Nitrate + Nitrite) 

0.750 mg/L 0.747 mg/L X X 

0.097 0,064

RV

0.713

0.950

< 0.5 

0.440 

0.994

0.773 

0.350

0.700

1.332 

3.680 

0.579

0.730

0.500 

0.927

Rating

4 :

0 

NR 

0 

0 

0

4 

0

3 ' ::' :

0 

0

1

4

0 

1

RV

0,663 

0.765 

0.705 

0.760 

0:480

0.840

0.720 

0,710 

0.784

0.972 

1.018 

0.727 

1.230 

0,700

0.747 

1.520 

0.812

0;720

1.080 

O.600 

0,680 

0.670 

2,640

3.28O

Rating

Y.Y.Y-.Y...2.Y...'. \z..\\''*!:''.

.'.^."3"''

o

,,,,,,;;;.:.;. 4;.;.;.;.;

......... 4...Y.Y.

0

0

total P as P 

(total Phosphorus) 

0.715 mg/L 

0.035

RV

0.698 

0.722

0.690 

0.740 

0.700 

0.710 

0.747

0.700 

0.795 

0.760 

0.712 

0.670

0.770 

0.807 

0.023 

0.708

0.740

0.860 

0.740 

0.489

Rating

4 

4

3 

3 

4 

4 

3

4 

0 

2 

4 

2

1 

0 

0 

4

3

0 

3 

0

PO* as P.YX:X;XX X-X-XXX X 

(Orthpphosphate as P)

x-0,030.xxxxx-:xx :;: : : : :

RV

0,628 

0.675

0.690

0.680 

Ov680 

0.640

0.660

0,702 

0-690

0.613

0-662

0.670 

0.030 

0.673

0.520

0.685 

0.670

1.850

Rating

S:fi

.- $ . » 

: x; xX'X4; xx ; x

-x.Y.x-:2.x:x-: 

: :X:X::: ' : O: :XY:: - :

:xx-xx.4x:-.x-x .'.'".V. 2 '.'.'.'.'. 

: xxx; x:4xxx-xx

Y.Y:X O.YX: X;. :

0

V.V.V..3 .V.'.V

0

31
Table 9. Laboratory performance ratings for standard reference sample P-29 (low ionic strength constituents)

(MPV, most probable value; mg/L, milligrams per liter; us/cm, microseimens per centimeter at 25 ° C; Lab, laboratory number; OLR, overall laboratory rating 

for all reported values; V/11, number of reported values of 11 possible values; RV, reported value; <, less than.)

F

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte = 

MPV = 

pseudosigma =

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 - 1.50

Acidity as CaCO3 Ca 

5 3' JO 85 mg/L" ' ' ' ' ' ' ' ' ' ' '

Rating Absolute Z-value 

1 (Marginal) 1.51-2.00 

0 (Unsatisfactory) greater than 2.00 

NR (Not Rated)

(Calcium) Cl (Chloride) F (Fluoride) 

1.84 mg/L 0,20 mg/L 0.056 mg/L 

0.14 0.18 0.028

K (Potassium)

x6.37:mg/Lxx 

0.04

Mg (Magnesium) 

0.57 mg/L 

0.02

Lab OLR V/11 :x^x RVx::xxfteting RV Rating x : : :rW::: Rating RV Rating RVx Rating RV Rating

1

2

3 

5 

8

23 

25 

26 

30.1 

33

34 

38 

39 

42 

46

48 

59 

64 

83 

86

89 

96 

100 

105 

107

110 

119 

134 

136 

138

140 

141 

145 

146 

158

180 

190 

193 

196 

203

204 

209 

215 

220 

221

224 

228 

237 

241 

243

244 

246 

247 

255 

283

284 

287 

294 

297

3.7 

2.9 

3.0 

2.4 

3.1

2.7 

3.1 

2.5 

3.7 

3.7

NR 

3.4 

3.7 

1.0 

3.1

1.1 

1.9 

3.5 

3.8 

3.8

3.2 

4.0 

2.3 

1.7 

3.4

3.9 

1.9 

3.7 

4.0 

3.4

2.8 

3.3 

1.8 

1.4 

1.4

3.1 

1.9 

3.0 

3.1 

2.0

2.9 

2.0 

2.9 

2.5 

3.1

3.6 

2.3 

3.0 

2.5 

4.0

3.5 

3.3 

1.7 

2.3 

1.3

0.9 

1.1 

3.2 

1.9

10

9 :xxxxxxxx--.- 

8 .... < 10 

9 8;44 

10 x 6.00 x

10 ., ........ . 

8 -xxxx-xxxxxx3 '" ' ::.. 10 -x : x : xxxxx-x-x----

0 :-:x-x : x: xxxx:x : 

10 2;t6

4 :xi6-40 :x 

8 .................

9 x-x-xxx-x - - 

10 5.00- xxx: 8 '"".'.'..;:.'.'.'.'.'.

6 '^XYXXXXXXXX 

5 -: : : : : : : : : : : : : :-: : 

11 3.10

4 vXxXXYX---'-

6 ..Y.Y.Y.Y.Y.Y.Y.Y. 6 'v'v' v 'v'''v:''. ':

8 xxxxx:: x: xx:::x: : 8 .XX.YXXXXX.X9 S'OO 

10 YXXX: X::XX: : X::: 

3 5.40 8 - - - - 

9 xxxxxxx-x..:

11 1.10 

6 xxxx'-xxxxxx

5 x x-<xl6x-::XY 5 .'.'.'.'.'.'.'...'.'.'.'.'.'.'

8 Y.Y.Y.Y.Y.Y.Y.-

7 YXXXXXXX-XXX

10 1 ,;.Y.Y,,,,.Y.Y.., ' ' ' ' ' ' ' '- ' ' ' ' ' ' ' ' '

7 xxx:xx; x: ' : xxx

7

7 xxxx: x: :xx : x: x: : : 

9 2X50

6 ' ' " ' "" ""'

5 Y.Y.Y.Y.Y.Y.Y.YXX

8 x:;xx6.50xxxx

10 .Y - 2 - ...

2 XXY.X.-.-...XX-..

6 8.66 

10 3.60

7 :x^xx:xx: x :x;:- ::

1 1 3 33 8 - - - -

7 xxxxx:xx: x;xxx

5 .. ..,, -.Y...Y:

8 2:00

1.81

: : : : : : : : :: 1i87

NR 1.96 

3 1.87

X : X :XX4.XYX 1.84

4.67 

NR 1.79 

xxxxxxxxx 2.52

1.81

X 3 1.83 

3 1 91

xxx:xO-:xxx 

1.80

6.34 

xxx 4 X 1.70

1.98

xxxxxxxxx: 1 83

xxx x 1.82

3 1.66

XXXXXXXXX-. 1.94 

2.14 

X 1.69

: : ::,: : : : : : : : : : 1.93 

3 2.00 

XX XX XX 187

 x--x-:4:xxx: 

1.86

XXXXXXXXY 1.77 

2 1.68 XX-::XY 1 si

NR 1.72

2.03

xxxxxxxxx:- 1.40

0.87

x:xxxx: xxxx 1.48

1.73

YXXXXXX-"-- 2.36 

3 1.80 

1.58

Y: : XXXX.XX:X- 1.85

4 2.58

xxx-4 : ::: 1.93

XY.X:X:X.: XX 1-85

x-xxxS-xx: 1.75 

.3 1.98 

x:xxx 1.89 

x3 1.89

1.65

: ' :; x : x : ' ::: ' : : : x: ' 2.50

3 1.70

4 

4 

3 

4 

4

0 

4 

0

4

4 

4

4

0 

3 

3 

4 

4

2

3 

0 

2

3 

2 

4

4

4 

2 

4 

3

2

0

0 

0

3 

0 

4 

1 

4

0 

3 

4

3 

3 

4 

4

2

0

3

0,1-5 

0:16

:xxx 0.53 xxx

x Ox21 x x

xxx- 0- 1:6 xxx

xx:xP;i;3: : : :xx 

; 0.15 

0.13

0,20; 

0.20

1.00

: : x : ::'TJO:xxx

0.31

 :: -<- 2- ; ;-; ; 

xxxxx<:4xx:- <Q,5 

< QjB

0.21

p.oo

0:19 

<02

0.28

x:Q,13 :-::: : 

<0.5

x:xxx<: :-|X--xx

0.80

0,38

x:x:: xo;r2::x x : 0.28

.-.-XX'Q^^XXX6.00

0,22 

1X00

0.22 

0.09 : -; ;-. ; ; o;i4;-;;-;

Y.Y.Y.1X24;.;-;:;-

xxxxo.57x; : : x:

.. ...<:5.. v . 

.xxxO.tS/xx:-

.,,.,,,.4...

xxxxxlxx.- 

......Q.'..'

NR

::: : : : : : : : : :4;>:y

NR

0

Y. ; ...Y. :3.Y.Y.

NR 

NR 

NR

xxxx:4:xxx

NR

xxxx:4x.-x

NR

4

,,.-:,.-.4-Y-.Y.

NR 

NR

XX-:X: P: XXX

.''.'.'. 4".'.'.' 

NR

....... NR^

xxxxOxx. ;;.;.v;:.4....;;.

.'"...'.'.a:.'.'.'.

.Y.;.Y.-.-.4.Y.Y.-.

V'x: xx4x: xx

NR

x::;:; :-:9;x:.

x-xx-lxxx:

Y...Y.-.4.Y.Y

NR

0.073 

0.032

0.040

0.040 

0.100

0.030

0.065 

0.052

0.070 

0.120

0.050

0.075 

<0.2 

0.040

0.050 

0.040 

0.060

0.039 

0.042 

<0.2 

<0.2 

0.074

<0.05 

0.000

0.019

0.060

0.140

<0.5 

0.068 

0.080 

0.220

0.180 

0.090 

0.050

3 

3 

NR

3

3

1

3

4 

4

3 

0

NR

4

3 

NR 

3

4 

3 

4

NR

3 

4 

NR 

NR 

3

NR 

NR

2

4

0

NR 

4 

3 

0

0 

2 

4

0:37

6.35

XX: X: 0.3;1XXXY

xxxxx<:1;xxx0.33

'^<.T-2f ..''

0.36

xx:x«38:xxx:

d:.46x

xxx ; : 0x39-xxx

0.37 

0.39

x-xx ::<:ix: : : xx 

xxx<P-5-xxx 

xx QX39

6.37 

xx0.ppxx:

0.37

0.40

xxx0;34

0.38

0:37

X 0:32 X 

6.31

0.35

0.37

0,42

: X:::OX10:v: ' : X

.....6.8P;:Y A

0.37 

0.32

xxx-x-4:x'xx

XXX-X-2XX-, 

NR

Y,.Y.Y.3..-.-..

NR

.?!^

1

x : xx: : 3:xx-:x 

x-:x:-.-.4.Y,

xxx:-N.Rx,. 

NR

".:::... *::..

NR

:;: : : : : 4:;.;.:

 -- 3 

x: x-xx4xx: :

Y...,,6,,.Y

NR

NR

.. .'.A.'.:. xx x-x 4 : 

x-.XY.2xxx g---

,,,,,,.-,.-.-,,.

........4.Y.Y..

V.'.'.V.'.o.V.V.'

XXXX-QXXX-

-x-:-:-x.3x-...-

'Y -.;.;' ZY.Y

0.59 

0.59 

0.58 

0.56 

0.57

0.56 

0.57 

0.69

0.57

0.54 

0.57

0.56

0.85 

0.57 

0.57 

0.56 

0.55

0.56

0.67 

0.62 

0.55

0.58 

1.00 

0.57

0.56

0.57 

0.52 

0.56 

0.54

0.59 

0.46

0.58 

0.54

0.56 

0.76 

0.55 

0.61 

0.57

0.67 

0.61 

0.56

0.57 

0.59 

0.61 

0.64

0.49 

0.54

0.55

3 

3 

4 

4 

4

4 

4 

0

4

2 

4

3

0 

4 

4 

4 

3

4

0 

1 

3

4 

0 

4

4

4 

1 

4 

2

3 

0

4 

2

3 

0 

3 

2 

4

0 

1 

4

4 

3 

1 

0

0 

2

2

32
Table 9. Laboratory performance ratings for standard reference sample P-29 (low ionic strength constituents) Continued

(MPV, most probable value; 

for all reported values; V/11

mg/L, milligrams per liter; us/cm, microseimens per centimeter at 25 ° C; Lab, laboratory number; OLR, overall laboratory rating 

, number of reported values of 11 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Lab

1 

2 

3 

5 

8

23 

25 

26 

30.1 

33

34 

38 

39 

42 

46

48 

59 

64 

83 

86

89 

96 

100 

105 

107

110 

119 

134 

136 

138

140 

141 

145 

146 

158

180 

190 

193 

196 

203

204 

209 

215 

220 

221

224 

228 

237 

241 

243

244 

246 

247 

255 

283

284 

287 

294 

297

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Na :(&idium}

0,66 mg/L 

x x 0x06 x

: : : : : : : ;:RV:; : : :-:::::>:

0.68

 xx-x:: 0,80: xxxxx:: 

0,63 xxxx^ojS'"' v: ';: 

: : : : x 0.65 x: : : : .-.-: 

V.'.V.V.VfluBS'.... ,,,-. 

CK68 : Xyxxx0.6x3x:xvx:xx

0.66

-.-. .-. ,. ,. 0.62

: :;: :-: 0.65 "' vv 

0.65.

: x: xxxyO;7&x: : ::-: : : : 

.0.56 ;; 

£65

-.-xxx-x-0;65: x:xxxx 

0.63

0.58

......... 0,87 ^,...,,,...,

xxx-x-x6.68-x-x-x-xx

0,66 x x-x 2.00 ' ' ' ' ' ' 

x: x: xxx0.70 : xxxxx:

y-y.y.v.-Qjjgv ."--v.v.

xxvx-x-o.70x:x::x.

P'ZoM.'....--- 

 XX-X-XO^Q-XXXX-X

.;.;.;.;.;.;.;.<. Q:SvX-Xv!v!

xx Q.75 - - 

x: x : x: x; 0.62xxxx;xx

xxx; x-x0-;65-x-x-x- x 

x-x-:: 0.57:: xx

0.64 Xyxyxxoxe*--:-: : : 

0:59- X 

0,67

:::: x:.-. 0.72x::: x : x:

 -: : 0- 8r

x:x: x-: 0.74x::::: : -

 X-XX:,P.70.y.y.yXy

0.70 

0.83

x:x:x:0.69x:x-x: :x

0:78 -X-X---X-0.56- - ' 

 x-xx: 0.78-xx:x:-

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating

4

X:XOX::

.... 4V. .-.-.- 

x-x2 ':x

xV:4.xVx4. yX4 x-.-x

::::3-x:x

v.-.^.v,,.

- -3x:x:

X-.-.^.Y.-.Y

'..'.A....'..

 X:T--V-V

.-xxlx-x: Y.-4-.-.-.-.Y

: ' : ' : : :4:x: x 

4

..v.?..;:.

 :-x-.0-x-x-. 

'v'2;;;V. 

x:x4x::A:

:::4::::: 

0

VV:3xVV:

 xx4-x:x

 xx3x:x '.'.'.4'.'. -. 

-:xx3xx-

: x-:-:0:;::-x

.-.-.-. 2 - 

XX3-XXX

: X;X4-.-.-..-,

 X-X2X-X.

4

 X-: 4-x-x :

x-x2x-x. v-'4 ' ' "

: X;X3-XX

X-'-Q 

xx : 2x; : : x 

::-:^-::-::::

-.-. .. 3-.-.-.V. 

0

X;X4X: XX '.'.'.''i.'.'-..

.v,.^... -.-.- 

xx : i :;- :x

PH 

6.85 

0.21

RV

6.85 

6.83 

6.85 

6.35 

6.96

7.22 

7.06 

6.38 

7.13 

6.74

7.00 

6.83 

7.69 

8.07

6.50 

6.45 

6.95

6.82

7.27 

6.85 

6.93

6.93

6.85 

6.89 

6.46 

6.87 

6.91

6.30 

6.84

7.32 

6.85

6.83 

6.60

6.73 

5.93

6.84 

6.84 

7.00

6.85

7.03 

6.85 

6.98 

6.05 

6.74

6.91 

6.82 

8.11 

7.00 

6.61

6.32 

5.95 

6.50

Rating

4 

4 

4 

2 

4

2 

3 

2 

3 

4

4 

4 

0 

0

2 

2

4

4

2

4 

4

4

4 

4 

2

4 

4

1 

4

2

4

4 

3

4 

0

4 

4 

4

4

3 

4 

4 

0 

4

4 

4 

0 

4 

3

1 

0 

1

Rating 

1 (Marginal) 

0 (Unsetisfactory) 

NR (Not Rated)

PO4 as P

:xOVQ46 x x 

0.012

 -. . . . RV--------------

0:039

0.048XX X 

6.039

<0;01

0.030 x 

0.028

0.040

6-038 x x

...o;o36. ........

<0:05 

0.039

0.062

0:055

0.050

0.040

xxx<o.5xxx: x: x : 

0.460 

OJ044

0.022

0;040

0.460

0.080 

0,050 x

: : ; : : <:OV05;::::::: 

0.070X x

0.050 

0.430

0.029 

x 0:039 1

xx;0.049xx x:

X0.030 X

0,041 

0.050

0,050 

x:0:047

x<:;0':25X-x : x : x : x 

0.060

<0.1

xx<0. :rxxxxxx:

0.044 x 

0.168

Rating

-.v.-.S-.--,-.

XX 4'XXX 

3 

xx:()xx-:-

- x:2xxx

::.;av.v.v

4;xxx

:x-3:: x-:-: 

3 

NR

v.v.3. ;.;;.-.

2

;.;.;.;.-;.;.;.-.

4 4 v :v - NR

0

"..4'.V...

,,.-.-1 .-,.-. . 

.;.;.;. :^::

0

0

xx;4:xxx

NR

X;XO;XvX

4 

0

'^2 '. 

XX 3 .XX

X;X4 : .;.vX

+%^: : : 

-.-,,4.-.-.-.-.-

,,-.4v.-,.

v.y4.y.y;.

: x : :4v''::';

NR

xx2:xxx

NR 

NR

X-X4.-X-

-:-xOxxx

Absolute Z-value 

1.51 -2.00 

greater than 2.00

SO4 (Sulfate) 

1.10 mg/L 

0.23

RV Rating

1.14 

1.05 

<10 

1.18 

1.20

1.16 

<5 

1.02 

1.03 

1.05

<1

1.00 

<2.5 

1.10

<1 

2.88 

1.09 

1.09

1.20 

1.00 

<7 

0.92

1.12 

2.00 

1.08

1.09

<2

0.90 

0.50 

<5 

2.20

1.20

1.15 

<2.5

<2 

1.82

2.23 

0.80

1.33 

0.95 

1.08 

1.00

<2.5 

2.28

2.93

20.00 

4.00 

0.92 

7.44

4 

4 

NR 

4 

4

4 

NR 

4 

4 

4

NR

4 

NR 

4

NR

0 

4 

4

4 

4 

NR 

3

4 

0 

4

4

NR 

3 

0 

NR 

0

4

4 

NR

NR 

0

0 

2

3 

3 

4 

4

NR

0

0

0 

0 

3 

0

Specific Conductance

xx : xxxl9:2:::x: x : X|JiS/cm-'x : x 

..........QX9.... ...................

RV

xxxxxi9.2xx: 

15.6

: X: XvX: T8:0: XX

1900.0 

16.9

x:-:-:::-1?aS;:: 

19.0

;;;.; 19.8;;:

Xvx :xl8.::1xx:

x: : :XyX|g;2XX: 

19.7

v,,,,,,.^-,,.

xx:xx20:0x:

17:7

x-xx-x18:2-xx

x-x:: : xx17i:6x:x 

-x-xxx-:-t9;6: : x : :

19.5

'":v:.v.i,9,4-;;; 

189

x:x: x;i'9,1: - : x: : 

19.8

x 19:0 x

19.5

yXyX: X 19:2-XX

-x-xxx'ia7-:-x19.9 

X19.6

::.-::::.-.-.< IY.Y,

;;;;;;;;23,6;;.

xxx:19.0x:

x : x : xx:T8:6x:: 

19.9 

20.0

xx -189.0 :

x-:-x-:-x-tg;5'--xxxi 9;oxx

X-X: X : X : 18:7;X;X

18.0

>-:::-::>:i«fl::::'

18.7 

20.0 

X 19.0

. ... .. 24:a -x-:---x-:-21;;7x-x

x x 26,0 

17.2

x19,0

Rating

xxx-xxx4x-,x0 

:=/%+::.

....-, v.-.O.-.-.-.-.-.-. 

-,,-,-,,-,0v,-,-.-

xxxx: xx1x: xxx

::.'.. "^'3;;;;;

x:x:x;x-2vx:-; -

;x: x: - : - : x:-4:xx : x

v.v,,,.v,.3xxx. -.-.-.-.- Q 

1

y.v.v.yX-.gX;.-.-.-.

xxxxx-x1-x: : :x: :- 

x: xxxx:x4-xxx :

XXXXX4XX

xxxx-x-4;- ' 

.....'...'..$:.'-.i

X-.-.X-XX-4X-X-, ..". ...'A'.''.'.'

XyXyX-X-4-X-X-

-.-. -.-.-.-.-. 3.-.-.-.-.-.

3

XvXvX;X4 XXX 

: . .::. Q .-.-.-.

.'''"^'^'0 ''''

-. --.-. ...'. . 4.-. -..-.-. -

x:Xvv:x: :3x':xx: 

.xxxx-,.-3.-.-.-x-: " " '"' 3'v "'' '

x-x-,,.x-:0. x: 

.y.; ,xxxx4x-x-:-

: . : .y.-. : .y. : . :4.-,.-.-,.-- 

yXyyXXJ-XyXy

yxx:xxx:2x-x-xx'

:XXXXXX4XXX: X

.,..-,..3.-,..,-,

.. yyy..v3.-.. -.-.-.--

x-x: :xxx4xxx:: x """".'.'o'.'.V.'.'.'. 

 : : : : : :: 0: :: : :-: :

-...-...-.-.. o. .-- - .-..

;;; ;;;.o ;;;;;;.

X-:-XyX:X4XyX; X

33
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

F-p

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Analyte = 

MPV = 

seudosigma =

Absolute Z-value Rating Absolute Z-value 

0.00-0.50 1 (Marginal) 1.51-2.00 

0.51-1.00 0 (Unsatisfactory) greater than 2.00 

1.01-1.50 NR (Not Rated)

Ag (Silver):; 7: 

34.1 ji.g/L : : : :-: : : : :

,-,,,,5 . 2v ,,, , 

Al (Aluminum) As (Arsenic) B (Boron) Ba (Barium) 

50.0 ng/L ::::i:3Qx :::: jig/Lx 242 ng/L 167::: xjig/L 7 

14.1 0,37 13 8

Be (Beryllium) 

9.00 ng/L 

0.82

Lab OLR V/26 RV Rating RV Rating Rating RV Rating RV Rating RV Rating

1 

5 

8 

11 

12

13 

16 

18 

23 

24

25 

26 

30.1 

30.2 

32

33 

34 

42 

43 

46

48 

59 

64 

69 

76

83 

85 

86 

89 

100

102 

105 

109 

119 

121

126 

134 

136 

138 

140

141 

142 

145 

146 

149

151 

180 

191 

196 

204

212 

215 

220 

221 

234

235 

236 

241 

246 

247

3.4 

3.0 

2.1 

2.5 

2.3

2.8 

2.7 

2.9 

2.5 

2.8

1.2 

3.2 

2.3 

0.7 

2.6

1.4 

3.3 

2.4 

3.0 

3.2

2.2 

2.9 

2.8 

2.8 

3.7

2.6 

2.2 

3.2 

2.1 

2.4

1.8 

3.0 

2.5 

3.1 

2.7

1.7 

3.2 

1.2 

3.6 

2.5

1.3 

2.7 

1.7 

2.8 

2.6

2.6 

2.4 

2.7 

2.8 

2.3

2.6 

1.9 

2.1 

2.8 

3.2

3.0 

2.8 

1.9 

2.7 

3.0

24 

23 

21 

17 

4

17 

22 

20 

10 

17

19 

23 

21 

3 

23

11 

3 

16

7 

19

21 

18 

5 

13 

6

15 

14 

15 

19 

22

20 

20 

6 

20 

9

6 

24 

17 

22 

15

18 

24 

22 

15 

11

18 

19 

17 

4 

16

17 

21 

19 

15 

24

15 

22 

19 

21 

23

"742;07777

36; 1

3570

..."<67.... 

:x:24:-l:x:xxx 

Y,,27,7xx::x

 : : 34.0: 7:

lie

.......32:5........... 

x;;;32.4x;;y.

,:x'4Q>°x::7x

38.2

144,0

; - : :7x36.4: x: x7::

.7.7:34:87:7:7;

29:5

35,0

... 34>!.,,,, 

25:0 :

; "32.9" .77

y, .32:7:;;;;;

29.8

: - ; x: x34>6x7x: x :

20,0 

39:0 ::

:x: : '34.2-:xxx

38.8 

30^0

:xx-29.2xx: ' : ; 

38.3 

35.4

,.xx:4,x;: '.'.''0'^' 

: x7:7:0: :7x

7'7l'''7''

y.y,,,4.y,,

;xyx47x;:

0

7x7x1x7:7

,.y.y.2.y,,.

7:7:7:4x7:

 X'Xjj-x::- 

7:77:4:7xxxxx4xxx

: : .;.;;: ,2 : .;;: . 

xxx-,4-,:x.

::::x-4 ---' 

:7x7:-2-x7 

3

0

y:;;;;4xx7

:-x:x,3.xx ;;;"4 "

. '..:A .'.: .

:XXXXTXYX

:x,.x:4-xx: '"'..'. -4; ...

xxx:4:xx:

Y.y.Y.3Y,.Y

x:y,:;4;7:y

...Y/..OY.Y,

;xx:x3xxx 

x7:7x4: x-x:

xxx;.: 3xxx

.;.;,.;.; 3.;,

46.3 

51.0 

37.0

45.1 

56.0 

<100

48.9 

45.0

170.0 

42.3 

51.4

53.0 

37.9

<50

33.0

74.1 

70.0

43.0 

46.7

43.1

43.5 

1159 

51.7

< 100 

64.0 

144.0 

<200

33.0 

83.8 

50.0

44.0

<100 

50.0 

102.0 

63.5 

45.5

47.7 

51.0 

64.7 

64.5 

53.7

4 

4 

3

4 

4 

NR

0 

4

4

0 

3 

4

4 

3

NR

2 

0

1 

2

4 

4

4

4 

0 

4

NR

3 

0 

NR

2

0 

4

4

NR

4 

0 

3 

4

4 

4 

2 

2

4

:x1>70:::x

,,,,.1X52 , .. 

1:20

1,20 -7:7

,.y.yl.20..y.y

<50

x:-x-1:-12xxx

7x7:1x30777:

7x72.59:7x7:

0,80

 XYXi:7o7.yX

x : :77-<x5 ::x: : :

:x77<:2x:7x

5ll

0;26

: 2.00 2'88

19,00

7x<7io:7:x:

xxl.SOx

xxxl.27yXy

-,,.y2^gy,.y.

,:7:7x<5:x7 ..'..'. <5 '".'.'.

,.y,.1.,30; .y,.

xx-x:<:-5- - - - -- 

<2

:;;;-: ;: 2xx . .

NR

NR xx:yX-4;;;: :

;;:;;°;: ;

: .-,: :-: 2:x: 

xxxx-:2,;.;v

NR 

NR

NR 

NR

NR

 ,,,,,,°,,.Y.

NR

:-xxxxlxxx

Y,.Y.Y.Q,,,,,

0 

NR

NR

:x:x:4;-;,,

NR 

NR

yxx;-: 4 xyx

NR 

NR 

NR 

NR

242 

245 

222

243

354 

235

251

328 

234 

243

257

242 

259

206

240 

242

261

200

250 

231 

255

236 

239 

243

256

230 

200 

243

240

246

231

253 

235

4 

4 

1 

4

0 

3

3

0 

3 

4

2

4 

2

0

4 

4

1

0

3 

3 

3

4 

4 

4

2

3 

0 

4

4

4 

3

3 

3

xxi70 : : : : 

,,,,,.1.69,,..,.

:xx7i58 : 7x7

164

:7:771 60 ;;;;;; 

:7:7xl:72 x x; :7

: :168 x 

166

x:x:xf59 -'-xx:-

x:7x202:yXy, 

xxx:168 -'-xx:-

"'...'i'6'7

153

X; :yXl62yXyX

159 x7:xi49: 7:x:

;.;,... 168,.;,.;,,

77x: :l77: x7x : : x:x:x1;72x;;;y

xxxl70:xx: 

162

x-x-x166,x-x-:-. 

146

150

143

xx 168 1 xx:

'Tm:T:

172 

: 170

162 

166

yx;;yX12;x7x:

178

7 160

160

xxx171x-xxx

 x-:-::16t-x-:--- 

158 

240 

7:7:x170;7;;; 

:-:-:-: : 173::::

: ,:x::4xx- 

..77.4.... 

6

: : : x7:,3y7y 

:x:x:x3xxx

:-xxx4xxx 

: : 77: : : 2 7x7

x-x:xQ-:7>; 

"4"

1

: x7x73.77:

,..,,,4.,Y

:zlf

s

777x4:7:: x 

.... o

o

 ::x::4x:x

xx:-7.4x:Y.

" ;;;;;4-;;;;

XYXX3-XX.

,x-:x:--4:::x 

;;;';' 4;;^

7x7x4 ; :7::

7.7.7.3 "y

8.84 

9.14 

9.00 

9.30

9.40 

8.10 

8.90

8.00 

9.94 

11.50

9.70

7.86 

9.92

8.10 

8.20

8.83

8.70 

8.00 

9.10 

8.20 

9.32

8.00 

10.00

8.92

9.04 

9.00

7.93 

8.69 

10.00 

9.50

8.00 

8.50

8.40 

9.00 

9.67

9.28

10.00 

9.00 

7.00 

9.60 

9.40

4 

4 

4 

4

4 

2 

4

2 

2 

0

3

1 

2

2

3

4

4 

2 

4 

3 

4

2 

2

4

4 

4

2 

4 

2

3

2

3

3 

4 

3

4

2

4 

0 

3 

4

34
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Analyte= Ag (Silver)

MPV = 34.1 j4.g/L 

F-pseudosigma = 5,2

Al (Aluminum) 

50.0 ng/L 

14.1

As (Arsenic) 

:: 1.3Q: : : 0.37

B (Boron) 

242 ng/L 

13

Be (Beryllium) 

9.00 ng/L 

0.82

Lab

254 

255 

283 

284 

287

292 

297 

300 

304

OLR

3.2 

2.8 

1.9 

1.2 

1.2

2.4 

2.1 

1.2 

3.0

V/26

16 

18 

23 

22

13

17 

7 

23 

19

RV

35.8 

39.0

:42;0

 ' ""2.2.'".' 

38:0 :

Rating

: "' ' ' 4 "'' 

:::: : : :-:-l ::-:-::

RV

50.0 

<34 

32.0 

74.0 

46.0

49.7 

47.7

Rating

4 

NR 

2

1 

4

0

4 

4

RV

,,V.<2..., 

: 1.00: :

 ; < 3 ' 

1.56 

1.50

Rating

NR 

NR

MR

RV

240 

256 

234

231

Rating

4 : 2 

3

3

RV

170 

:: 190: :

163

180:: 

162

Rating RV

....... .4,.v.. 9.04 

6 8.89 

:::::: 0 ;; 17.00

3 8.00

1 8.60 

3 8.80

Rating

4 

4 

0

2

4 

4

35
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than

Analyte = 

MPV = 

F-pseudosigma =

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Ca (Calcium) 

72,6, mg/L

,, ;,.£-.-. ,;;,;,. ,,, ,

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Cd (Cadmium) 

13.0 ng/L 

0.8

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Co (Cobalt)

insuff.datax:xx

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Cr (Chromium) 

27.6 ng/L 

3.0

Cu (Copper) 

28.4 Mg/L

Fe (Iron) 

0.049 mg/L 

0.005

K (Potassium)

x:4;60x mg/L :

Lab RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating

1

5

8

11

12

13

16

18

23

24

25

26

30.1

30.2

32

33

34

42

43

46

48 ;.;.

59

64

69

76

83

85

86

89

100

102

105

109

119

121

126

134

136

138

140

141

142

145 : 146

149

151

180

191

196

204

212

215

220

221

234

235

236

241

246

247

xx72,5,;-;.;v x

67:6

x:: 73.6^;;:

74:1

75.9

74,0

69.3

xx-74,2XX,x

74.2

78,5

-XX72:6XXXX

' ' 59,0 ,vV - :. 69:d :

77.0

79.4

72,2

:x-73;2xx:x

:::-:75;4-..::: : : : 71:6

: : : x737:: x: ' : x : 7d:4

X71X2X x:

70,8 .

: 73:6

xx: 87Xl: : : : : x: :v

73.3

69X0

: 70.6XX

,,,.72,5,.,., . 72:7

73,5 :

: x : : :7:i: ;:3x: x : ' : : :

68:7

x::73,4 xxx:

:x:71: :dxxx:: 61,0

70:8

:x :74;;|X-xxx

72.2

;.74o;xx;

:x72,8x::x69.7

: :x7i: ,exxx:

69.9

72,0

x 67:0 xx

70,0;;

67:6

x::74;2: x:xx

76.3

70:2

80:2

,,,.72:2xxx,

73.2

,,,,,.4.v.v, "".'.1'

: XXX :4: X : ' ::

V.V.,3,,,,.,

 :-x-:x2,x . 

.....3..... -'-'-'" 2- '"

XXXX3XXX

3

0

X,,,4-X;X-

.6

xx:2xxx-

:x,,x1xxx:

.0,,,,,

4

:x:x4xx

xxx,2xx ' ' ' " 4 ' ' '

: x: :x4x:: - :

,,,,,.3.,,,.

: x: : :x.3xxv

V.V.V3,,,.,

xxx- 4:xx:

: : x : 0

4

....?... x:,x-3xxx

..,,,.4.,,.

...... ^.....

 xx::4xx:

x:xx:4x: ' v'

.,,,,2,,,,

-,.,,,4,,,,,

x: x : x;3-'x::

0

...... g.....

xxx :3"xx:

,.,.,4x-x

xxx3:xx

xx::4xxx, '""2"'"

xxx,4xxx'

x:x:2,x.x4

XXXXQV - V X-

,,.,..3,.,,.. x-x-x^x-: - 

x : x: x: 3: xx:x

,,,,,,2......

 . . £. .

XvxOXxx:

xxx- 4x,v

4

12.6

11.8

13.0

12.7

12.8

12.3

13.1

12.0

12.6

<6

13.5

15.0

14.0

13.6

13.1

13.6

12.7

13.0

11.8

12.1

12.7

15.2

16.2

12.0

12.5

13.4

14.5

12.4

11.5

12.6

13.0

12.8

13.4

15.0

13.1

15.0

13.1

17.0

12.2

12.2

13.0

12.0

16.4

12.5

13.7

12.6

12.0

13.0

12.5

13.5

4

2

4

4

4

3

4

2

4

0

3

0

2

3

4

3

4

4

2

2

4

0

0

2

3

4

1

3

1

4

4

4

4

0

4

0

4

0

3

3

4

2

0

3

3

4

2

4

3

3

xx:xx:<x1;xxx:

. '..'.'.<.3...V.

x:xx<xi:o: xxx

 .. <,5,,,-.

x:1:.00 x

<5

< 12 x-x'x'x<-6' ' ' ' 

0,50

0.40

: xxx: <:2' ; x: x

x 0.40

,,x<xi:0xxx

:: x : xx< : 5x: :x : XX' 1X25

10.00 " <: ! - '

0.41

0.41

IQJO

o:67

 : < 10

.v..v <: xi.: . : . : .'.

7.00

xx-<::lO:x:x :

:: <::5.22vxx:

0^45

....... <.^..... x xx- <-5 

i.oo

X0,50

x .'.".'.'.'< : 0.406... .

< 10

< 1 x

NR

NR

:xxxNR::x

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

X NR

NR

NR

NR

27.3

27.0

23.0

30.7

24.7

27.0

30.1

30.0

29.8

29.0

26.9

26.2

24.1

28.6

23.9

26.7

27.5

29.6

25.7

30.0

25.2

30.3

26.1

23.0

27.7

26.3

26.9

33.1

27.6

33.0

23.7

27.5

37.0

28.7

34.0

24.1

26.2

25.4

24.5

25.0

29.0

48.0

30.6

30.1

26.0

26.0

3.2

29.9

28.2

4

4

1

2

3

4

3

3

3

4

4

4

2

4

2

4

4

3

3

3

3

3

3

1

4

4

4

1

4

1

2

4

0

4

0

2

4

3

2

3

4

0

2

3

3

3

0

3

4

X : X : X27,3X:X;X

29.5

v x : X32.0X: xx

X30:8 X

28.0

20:0

29.0

27,0

x: :x: 27.TXX:

29.7

28,0

27:6

x29,0x -;-;-

 : ; : : : : : : '26:5;X: : : : :

.;,,,,24:5,,,,.

28.4

xx,23.4/.:-:

;.;.;,,.25.0. ;.;.;.;

' : x-:x<.50xxx:

 v,.v29r3V.Vv

28:4

xxx,35vO :::

30:0

:: x"27.l' v:>

x 27:9 : x: x:

25,0

26.0

30.0

33.0 XX

30:0

: xx:41.2x: xx

 ' ' v28,2xxx:

30.0

:xx: 25X5;XXX

28.5

42:0

32.0

30,0

24.6

26.;1;

v,XX23:2;XXX

xxxx24x5 x:x

24,0

33.0

xxxx38;3:x;x:

29.5 '""''26:6.;v '

26.6 X

28,0

37.0 X

x::x28;4: '-:-::

28:4

XXXX4Xv.

, . - 

x : xx:2:x: x:xx:3;xx '.'."x:4'.'.'..

x-xX'QX-:-x

xx:x,4,;x '.'.'.'.'."3.'.'.'.

xx : :x4x: x : '

xxx- 4.;-;:

4

;.::-::. 4,,.;:;.

,.,,,.4xxx

XXXX3XXX

xx:x-2x:x

.^4^ -,x:x-l '

,..,,,.2.,,,

x NR

V.V.V.4....

...... 4 ....

;Xv.;X;Q.vXy

- . . ,.-3 

X-X-X-4'V - V -

:;x:x4:::x

.,,,,,2-,,,.

x:x: 3:xx:

^,-'-3,,,,,

x:,.x:1.xxx ' "3" . x: : : ' : ' : : : :Px: x : x

. ,..,,.4,.,,. ,,,,,,.3,,,,

XX-X2XXX

,,,.-,,4,,,,, " ' ' " ' Qv-'- v

,.X : :X2;X;X:

v.XXXSXXX .'.'.'.'2'..

,,,,,,.3v,,,

,;v.;.;.1. .-;,;

: ;xx: x :2x:::

 ..! ., ' ' ' ' ' 'r"

x:xx 0:xx

... ...4 .... - ' - - -3 

xxx-3x:x

: ,v: .;. : ,4.,.. xxx'OVx'

v -x : : : :;4,,,:

- ,,.4...

0.047

0.050

0.035

0.013

0.048

<50

0.054

0.051

0.040

0.047

0.300

<0.5

0.060

0.050

0.046

0.044

0.048

0.057

0.046

; 0.050

0.047

0.049

0.063

0.048

0.048

0.057

0.050

0.053

<0.05

0.046

0.048

0.048

0.043

0.068

0.044

0.046

0.052

0.025

0.004

0.060

<0.02

< 0.1

0.054

0.052

0.062

0.048

0.047

0.050

0.064

0.058

4

4

0

0

4

NR

3

4

1

4

0

NR

1

4

3

3

4

2

3

4

4

4

0

4

4

2

4

3

NR

3

4

4

2

0

3

3

3

0

0

1

0

NR

3

3

0

4

4

4

0

1

:x:x4,45x;::

4.66

x: x v470 : :x:- :

; ,XX4;18X: X;X

4:76

4,60

4.80

x:::4;45XX: x

4.27

5.85

4.66

x: x : 4.7QXyX: XXX 4-66;X;,X

4,40

4.80

474

sVoo

4,88

: xx4:96-xxx

4.32

XXX4X71 -::v:

4:48

4:38

x:: x4:74x: x x

4,20

4:33

-x : . : : : 4:88': x-x

4.00,

4,48

 ::x-4;3Q ,.;;: :

4.36

3,91 x

4.54

4,53

::::x5:Q5::xx

450

x:x4 .45--xx:

XXv.4:63: XvX

440

xx:x4:71 xxx:

,xxx,<,5:x,,

2.60 .

x:xx5:70v:: :: : : :

xxx4.85xxx ""4"5&"""

4.66

5.30

476

xxx4:76: ' :xx

XXXX3.XX

.' ..V4..V

x: x : x: ;4:Xv

-xxxxlxx :

 ,,,,,.;3.,vxx,..4:x,

'3.V.

xxx:: 3x: x

XX: 2;.;.

0

x-:xx:4'x:'.

x :xxx4x::;

xxx4x-:x

xx,,.3x;x .'^'3.'''.

.....g.....

- ':' ':': 2- 

""""'2"''

: x: x: : : : : 2::x: :

 2; -

x : :xx : 4-:x:

 ,..,,,4,,,,

 , g,,,,

x : x :x:3':::'-:

.-:.-::. 2:.-:.

''' "'2'''"'

: x : x: x2x: :x

,. ,. O-x-x-

.'...*"...

:..::: 2:::. 

.- . - .

xxxx-0 x:x

,.-,,,,4,,,,, ' ' ' ' ' ' 4-'-'-'-'-'

' xx-xix-x-x-

:xxx:4xxx; . XX-XX3V 'XX

 :-:::-x : 4xv:; x

"3 '".'.'.

xx : xx4xxx:

x:xxNRx,, '.... V.'O '.'.'.'.'.

::x:x: :0xxx:

:xxxx3xxx- """ 4 -,-,..

vXXX4yXv

..'. .V.'.O..,,,

xx:xv3xxx

XXX.3XXX

36
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)-Continued

(MPV, most probable value; \iglL, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reportad values of 26 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Ca (Calcium)

"72.6 'mg/L

:: :::-:-:2;7x-: - ::.-: : : :; 

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Cd (Cadmium) 

13.0 ng/L 

0.8

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Co (Cobalt) 

insuff. data

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Cr (Chromium) 

27.6 ng/L 

3.0

Cu (Copper)

28:4 |ig/L

 :,;::;:::2;7:::: '::: :::-::>:::::-

Fe (Iron) 

0.049 mg/L 

0.005

K (Potassium)

4:60 mg/L

: v:::-0,27::;::-:: ::x:: :- :::: :

Lab RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating

254 ; :71,5;

255 73.3

283 60:0

284 77.9:

287 7P:q

15.0

12.8

13.0

10.0

22.0

30.0

30.8

29.6

31.0

34.0

30,0

28.8

33VO 

39:0

0.049

0.052

0.047

0.002

0.063

4,40 

4.52 

4>07 

4.85

292 74.6

297 73,3

300 86:9

304 75.5:

13.0

13.7

13.3

0:63

0:43

27.0

36.6

30.0

22.0

27,0: 

27.6

0.050

0.059

0.309

37
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents) Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Analyte = Li (Lithium) Mg (Magnesium) Mn (Manganese) Mo (Molybdenum) Na (Sodium) 

MPV= -VV1SL2-X M9/L 14.2 mg/L xx X307 x x :jig/L 37.8 us mg/L 

F-pseudosigma = : X^Q 0.3 17 3.5 : : 4 : : Lab RV

1 ,,. 20.8 .,,,: 

5 18:1

8 :::;<20 : x

11 ...'.V.V.V.V..Y.Y.

12 :XX"-:-,'Y,.Y

13 : :-: :: : ::::: : : : :-: 

16 ;.vO,VVV.,V,, 18 ' : : : : : : : ' : : :' 

23 : :;:;:; ' //^- 

24 30.4

25 21,0 

26 x :i9;7 x 

30.1 19:q 0 

30.2 '^^Wx^xVxV-: 

32 18,0

33

34-::::V:; xVxV:: xV: 

42.. Y,,,.. ,.. . 

43 

46-x:x:xxVxV:-xV

48 :;:,.. : : ::: : : ::: :-: 

59

64 -^^VVxVVx.

69 <50 76 xxxxxxx: : : : : : 

83 ,: : : ,.:: : : : : : : : : : 

85 86 : ::: :::: :-:-: : : : 

89 x-x-xxx-x-x-xx 

100 20.0

102 :-: :-: 

105 <50

109 ;;:

119 xVxxx : X:::- : - : - v 

121 ..-: : :-: : .-.:: : : : : : 

126

134 :15;4 

136YXYX-xVx:XY.:x 

138

140 Y,V: : x: xVx : x;::"

141 ,:: : ::,,: : : : : : : :: 

142 19.8 

145 ;:; 25.0 

146 

149

151 : 16.2 

180 

191

196 xVxVxx : ' : x-x-x 

204 x-xxxx

212

215 x : xVx;x;x: - ::: - 220 vx-x-x-x-xx::: 

221 

234 19:2

235

236 15^0

241 ^'^x-xxx^xVx^ 

246 .,-,,1-8,3..,, - 247 20:4

Rating RV

: 3x: 14.1 

3 14.2 

NR 14.2

;. ;.;.;.;.;.;.;.;.;.;.;.;., 14.2

X XX X X 14.0

x 14.3 

12.9

vXX-.XXXXvX 13.2

0 14.4

2 14.7 

xx X 4xx 14.4 

4 13.0 

15.0 

3 15.4

14.4

'V'"V VVV'V' 14.0

:xxxV:Vx:x: ' : ' : -' 14.2

 xVxVx-xVx:: 15.1 

14.1 

x: x;:V:: - : xV::: - 13.6

NR 14.2 x-x^x-x-x-'-x-:- 143

x.xxxxxx-xx 13.9

13.9

x-xxx XX -i 4.7

14.4 

4 14.8

15.0 

NR; 13.7

;V:;V:V.V.V.V.V 14.0 

140

xxx-x:x-x :xxx 14.0

x o 14.3

X-XYXXXXXXX. 13.0

..'.'. ..'. -V-VV 14.1 

Xvxxxxxx: 14.2

x x: 12.0 

4 14.8 

x 0 x 14.8 

xx X 14.1 

14.0

XXyXvXIX-Xv.

:xxx : xxxx:xx 14.1 

14.0

XyX-x-x-xx:xx- 14 .,

x xx x x 14.0

14.2 : : : : : : : : : : : : : ' ' ' 13.4

: : ,,: : : ::,,: :-: : : 13.6 

14.3 

x x 4: 13.9

xxx 14.5 

6 14.0 

x; x: ' : x:x;:;::' : - 14.2 

3 14.7 

3 14.2

Rating

4 x 

4 

4 

4

3 

4 

0 

0 

3

1 

3 

0 

0 

0

3

3

4

0 

4 

1 

4 

4

2 

2

1 

3 

1

0 

1 : 

3

3 ;

3

4 

0 

4 

4

0 

1 

1 

4 

3

4 

3 

3 

3

4 

0 

1 : 

4 

2

2 

3 

4 

1 

4

RV

 x-:-:293>:-:v: 

305 :X 313V ' V '' 

309

320

: x: x277v:: :x 

306 

305 

323 : V

316 

312

:xx:^°x-: x

330

330

:V:V262::: 'X 

xx:312x:;::: 310

283

300 x:

XX:-331:::' X

294

v'vSSO:::::

313

::;VV324 v -" 

:;. : 327 :-x-: :

294

305 

x: 31 1 : x 

317 

: 300

312 

279

 x-x313;-:x: 

300

272 

328 

324 

311 

306

x 271 

XX3Q7

xx:249xxx

277

310 

290

::;V327'::: 

XX309X 

264

278 

305

277

xxX324x'- v ' 

306

Rating

XXXX-'-S X 

,.,,,..,.4,,,,. - - -4 

xx : xxx ; 4 :x:

.,,,,. ,,.3.,. ,. 

x-x : : : x : xlxxx:

.;.;;;.;.v.;.4,,. ' ' ' ' ' ' ' ' 4' 

vX-xxx: 3X-x::

......... ,3-.v.-.. 

xxx-xx4:xx

x-xx-x:0'xxx

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: x: x: x: xqx:: : xxxx-,4x: "".'.. 4...

2

.-x-xxx-4x : :x

vXyX;:y2;X:X

v "v;-''3""

yXy. :: y3X: X: X

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y.y.y,,,2 ,.,,

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XX X-'y4 

.'.'..::: A.::::: 

: ., : . : .y,.y^.: ,.y

x : x: x: x: :4-x: xx 

... 4

1

x-'---'-x-.2:-Xv """.V.2.V.

yXXXy^yX

xxx,xx4x'-xo

xxx-:-:-4-xx

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: x-xx: :;.i:: x : '- :

,:-x'xx-:4v:xx 

.V.V.3.V.'.'.

; Vy.y.y2y,.y

y..,,,.-x-4-x:x

..v:.v... o'.v.v

XXX-'XIXX--.

xx-x-:-:4xx

'. . J...'. :: :: .-: : -3 : " ' 

,,,. 4

RV

37.8 

34.3 

<20 

36.7

<50 

37.2 

35.0

38.9

36.0 

42.0

43.0

37.0 

42.2

38.0

36.2

39.0 

37.7

38.3 

40.9 

36.3

31.3 

39.5 

39.0 

37.1

39.7 

35.0

36.0 

40.8 

34.6 

33.5

35.0 

40.0 

39.7 

38.3

Rating

4 

3 

0 

4

NR

4 

3

4

4 

2

1

4 

2

4

4

4 

4

4 : 

3 

4

1 

4 

4 

4

3 

3

4 

3 

3 

2

3 

3 

3 

4

RV

114 

XX12Q x 

, 115 

105

117 

119

x,vl:l:2xx: 

1180 

117

X 120 x 

118 

 110 

126 

123

118 X

XXyniX: X:

x:117x

1:24 

110 

116 

114

117 ''": ' :W':"::: 

119 X 

112 

129

xxx Mxx: 

114

: xxi:i:3;:;:': 

xx-:ll: 7:: x:- 

115

x::; 1: 1: 2x^-'

yX-^igXXX

X1X16XX

100

xxxl23'X': : : 118 x 

127 

x: xfis x:

116 

114 

123: 

113

118

v,.: .1:l:2::x 

1140 

: ; xx:11:3; - v ' : 

117XX

110 

102 X

107; ;

X121

Rating

4

x: :------:---2;:;::

.".V. 4 -X-.-X-Q-X-X-

........ 4.V.V.

 X-XXX3XXX-'

 xxxxS'xx: '.'.'.'.'.'.'. 3,-,,, 

:-x-:-:-x:4xxx

XXXXX2XXX

.....$.... 

Xyxxx2:y:;:v

,xxx,:Px-x-, - - - tv -""

.y,XyX3x::.-.-

::XXXX3X: X'

xx-:-:- 4-x::-

1

: x xx : x:2: : : : : : :

. .Y.Y.V.4X-X " - -^ ' ' 

.'.-. ... Y.4.-.-.Y. 

. Y.-.-.'.-.j.-.Y.-

: x: '-'-x : : : 3x-: :x- ".'...'.'.3 .. 

-:x: : x: :xo : : '' ''

XXXYXO:XX-. 

...... ^......

:: :-: ' Y^Y:::-:

x,-x-:-x4x:xx: 

.'.'.V...'.4.: . :. : . : .'.

X : Xy.Y.3XXX: . 

.Y.Y.y.-.4-.-. .-.'. .

x x-x-4:x:x-:-

0

y:::::: xix: : : - : ' : ' :

XXX-X-.3X',,,.

"V "'V Q':0' 

: : : x: x: x:4;x; x-

'"" 4.'.'.'"

y.y.YX:4 :XX

Y:-X-X:-:I:X-:.. ' ;;'" ' 4V"

3

.;,,,,,. .3:-Xy.;

V.V. "4.V.V 

: :XyX.x4'.-'XX

XXXYX4VXX,

x;x: x::ijx-x:

x-x-xx:Ox-:-x- 

......._.......

xx--: : : X2X: : : '

Ni (Nickel) Pb (Lead) x xxxxx 

6.92 ng/L 150 fig/L 

2.08 x: x; x: x: :8xVx::Vx: x: xVx: x : RV

6.17 

<10 

<10

<20 

13.80 

6.00

<49 

6.17 

8.30

10.00

13.30

6.00 

8.80

<50

<15 

<10

5.06 

6.93

<1 

8.00

6.10

60.00 

5.46 

16.70 

7.86 

3.00

<20 

6.71 

13.00 

<40 

6.00

6.60 

<16.3 

7.00

5.15

8.70 

6.00 

7.20 

6.74 

6.92

6.20 

6.00 

<10 

<15 

8.90

Rating

4 

NR 

NR

NR

0 

4

NR

4 

3

2

0

4 

3

NR

NR 

NR

3

4

0 

3

4 :

0 

3 

0 : 4 

1

NR

4 

0 

NR

4

4 

NR 

4

3

3

4 

4 

4 

4

4 

4 

NR 

NR 

3

RV

147 

x 150 

::1:33 x 

145

V:V:i28W:

153

v;i52;;;

140 

138 

157

148

151 , 

153

146

274 

168 

X144

146x 

150

136 . 

146

149 X

xxxWx-x 

169

X X152 X

,,,.1.62,,.,

Vi39 :

145 

148 

XX161XX 

VV154 

:148x -: :

120

384

; x: :Vl82:: x: ' 

160 

148

X 152 

160 

136

157

140 

140 X

.151. 

144

V : : :X146-.V::

146 X '152 '':'.'.

x : x : l52: x x

150 x 

163

Rating

4

 xxxV:4:VV:

.,..,,.VO,.Y. '" v'sv:'

V:V:x: : xO"x: x

xx:-:-:-x4Y.:-:., 

....... ^

x: x: x : :x2VxV 

.,X-:XXI. :XYX V " V"3 V'V'

: : .-. 4 

 x;,.-x-4,,::-: 

v""4":

....... 3,,,,.,

 ,,.,,,,.0---.-.-.-.-

V-V.VY.{J,,,,,

xVx-xxsxxx-

 .... .Sxx-x '""'"4'v;:"

 ,Y,,,,1.,,,. x 3 

XXX: X 4;.;:x

xx:-x,0..xx 

,,,,,,,.o ,---

Y,:::4- 

-,xxxx:1:-xx,

XyX-Xyg XyX

 X.XX3--.-.- X-X-XX4--'-----

xVx-xV2:x-x> 

V. ,'.3......

YXXXY 4XyXy

,,,,,,,0x:xx """'vis'v'vv

xVxxxOxxV:

...,,,, ,2.Y'.Y.

. ,,,,;4 ,,.

XX-X-X4::-'-'

,,..,,,;2,,,,, "'vvvvi'vO'

:-: : .-x-S:'-::

2

:VxV:; x-2 : x: :V

-.-X-.-.-X-4V.-.X-: Y.Y-.Y--

yXXXY^.-.XXXXXX-XSXXXY ""'"'4"" 

"x: x:: x4;x; x: V "T""

38
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)-Continued

(MPV, most probable value; \ig/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00-0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Analyte = Li (Lithium)

MPV = ^.vig^XyXv.v

F-pseudosigma = . V.I..6V.......

Mg (Magnesium) 

14.2 mg/L 

0.3

Ni (Nickel) 

6.92 

2.08

Lab RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating

254 ; : 20.0

255

283 18:0

284 :: 

287

14.1

14.1

12.8

15.1

14.0

35.0

34.8

94.0

<5.2 

8.00 

9.00 

2.00

NR 

NR

3

3

0

14.5

14.4

16.2

14.6

32.0

44.9

38.0

<20

10.10

4.80

NR

39
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)--Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Analyte =

MPV =

F-pseudosigma =

Lab

1

5

8

11

12

13

16

18

23

24

25

26

30.1

30.2

32

33

34

42

43

46

48

59

64

69

76

83

85

86

89

100

102

105

109

119

121

126

134

136

138

140

141

142

145

146

149

151

180

191

196

204

212

215

220

221

234

235

236

241

246

247

Rating

4 (Excellent)

3 (Good)

Absolute Z-value

2 (Satisfactory)

Sb (Antimony)

; x :x:24;-|-vX: : : x

,,,,3,3,,,.

RV

x 19,7

 ::,.: .2' 7.2-.-X : : :

" v - v- :2:2""

: : x:::22:3' : x: xx

24.2

; ' : X:X13.6XXX: '

.. 23:0 ...y.

...< 51

 : '. : 1Q-\2 ' ' ' ' '.

: XXX26,0.;V;XX

x: :x24;o: :: : : : : :

24:4

21.0

25,0

XyX25:4yXXX

XyX^gXsyXX:-:

25,1

24;e 

xx : x24.6: xxx:

17,0 x

'''23:6 '; ;;v

,,,19.5yyX

21,1

22;9 ' ' ' ' ' 

x :x 26,5 :: --

y,;,31:2yXyX

yXy:<:: 5Ci::XyX

24.4

: xxx27.8'::v'"

,25,0 : 30.0

'23;9' ,'

30:5

' : ' ::: <85 v;::

: . : : : 25.5:; x

^/Lx

Rating

X 2X

,.y.3y,v.

 , Q '

yXXSXXv

.....4....

: x::: d: x: x :

,.,.4,,.

NR

: " xx'1x v

XyX3::x

::: x: 4x: ' x

YX,4 ,Y

.'.'. 3..

4

 xx. 4 xxx

: x : X2 x: : : x

.,...4,,,

 - - 4 

xxx4xxx

0 ' 'x. 4 ":':'.

,,x-2-,xx

. . ,,,3. . ,

;::,4x:xX 3

.y.y.O.y.y.

NR

.v.:4.;.; : ':'. '. '2 '- ' 

y..;. 4y...

.'.'1'.'...',

; 4

 ' "T-v ;

NR

; X;X 4.XXX

0.00 - 0.50

0.51 -1.00

1.01 -1.50

Se (Selenium)

insuff. data

RV

2.10

2.62

1.20

<5

11.50

< 1

<129

1.56

6.80

<4

8.00

2.20

5.40

<5

1.93

2.22

<2

<5

<7

2.26

< 1

0.58

59.60

3.30

<2

6.22

< 10

4.00

<53.2

<2

7.52

6.30

<5

2.20

1.00

2.32

<90

<5

<80

<5

Rating

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

NR

Rating

1 (Marginal)

0 (Unsatisfactory)

NR (Not Rated)

Si02 (Silica)

26,g mg/1_

..y,xxt.;6x:;xx:x:x:x:x: :xx

RV Rating

25,9 3

 :.v.v27:6:::: :;:: : : : :x:4: :::: -

.,.,25.2,,,,,,,,,,2,v ,

2Z2 0

y.y,27.6.y,y,yXX4y,.

.^26> 4..^^^4;;;

,y.y.27 . 8 ,,y,,,y.3Xy,

-xxx-37^7-x:,:xx:-,0'.;,:,

.^'^28.2 ' "3"'

28,2 ' ".' /".3X"

:xx26.3xx:xx-x:4xx:

-x:x-26:4:;:::::xx: 4 :x:

V; v:.26.0.;v,x:x:x3:-;:;,

,, 25.0,.,y,y.y.2y.y.

268 4

x,X2g.-.jX:xxx:::2xx,

y,y25_Q.y,y,y...y2,y.

. V 28.7,y, v ,y,2,y.

: xx'27:3: x: :x : ;x: ;4x'::

,,,,27,8,,,,,,,,3,,,

,:X27;1XXXyXXXy4XyX

:x:26:,1'-^-^- x:x:4: x : x :

25.6 3

x:x: :30;t:: ; x::x: x: :1x:x

.,,,,26,9,,,,., 4

 .y.y.27,4yXyXyXy:4-Xy.:

:::2e.6vXxXxxx-4:x: :

28.6 2

26,9 4

22:5 0

,,, 26,4x ::::-:,,: ::4:-: ;:-:

,yX^g.gXy:Xy:XXy.O y'y

253 3 ;.

276 4

X 43-7 0

Absolute Z-value

1.51 -2.00

greater than 2.00

Sr (Strontium)

810

27

RV

794

852

799

804

764

761

862

868

810

780

914

802

845

832

861

832

814

808

762

818

816

834

816

800

802

815

795

819

787

H9/L

Rating

3

1

4

4

1

1

1

0

4

2

0

4

2

3

1

3

4

4

1

4

4

3

4

4

4

4

3

4

3

v (Vanadium)

6:56

3:90

RV

6.56

:x: x4:74:::

....< 10

<50

670

XXSJJO

7,85

,,;x<.4:x.

5.50

7; 80

5,00

4.20

:6:69

4,60

12.40

< 10

7,00

xxx:<-.13y::

X 5.04x;

10.60

5.96

< 10

: x: xx5:34:;

16,00

<1Q

15.60

5.20

X 50:00

14.00

6,:10 ;

6.30

9.00

: X6.00 X

13,90

5:10

H9/L

Rating

4

 ::: x : x:4:: x : NR

......... NR^....

XXy.yX4Xy

...4.....

NR

.'.V4.V.V.

xx' : x : x4::x: :

" ".4;..;

-.. ..',.v.3.,,,

: : x :::::4 x: x

........4 ..

.... ..2.V.V.

NR

:::: x-:4 -. 

NR

yXyXy:4yXy: """.'.2-,-

x xx:4x:x

NR

;XyX; .y.4y,y

.. .. . .Q.y.y.

NR

..'...' 'P'...

x x;4:,.

y,.y,.0;XX.

:x.....1..V

::::::;:4:::. : "'."4.v;

::::-:::-3-x::

xxxxx4xx-

......... _.....

:x,xxy4xxx

Zn (Zinc)

363

16

RV

333

365

363

362

382

311

357

377

<4

365

380

355

350

371

281

409

356

346

364

339

368

340

370

370

420

385

368

338

361

370

318

490

378

365

339

358

362

386

330

340

387

365

331

357

363

366

378

HQ/L

Rating

1

4

4

4

2

0

4

3

0

4

2

3

3

3

0

0

4

2

4

1

4

2

4

4

0

2

4

1

4

4

0

0

3

4

1

4

4

2

0

2

1

4

0

4

4

4

3

40
Table 10. Laboratory performance ratings for standard reference sample GWT-2 (ground-water trace constituents)-Continued

(MPV, most probable value; |ig/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Sb: (Antimony)

: 24^1 : ::ng/L:

:''.... 3,3^^v,J:v 

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Se (Selenium) 

insuff. data

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

SiQ2 (Silica) 

; 26:9: mg/L

.,,: : :-: £$: : : :: ,:. ,: : : :: :::

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Sr (Strontium) 

810 ng/L 

27

V (Vanadium) 

6,56 :jig/L

: $m :,:,

Zn (Zinc) 

363 jig/L 

16

Lab RV Rating RV Rating Rating RV Rating RV Rating RV Rating

254 ' 

255

283

284

287

292

297

300

304 

78.1

22.8

:19.0 : : : :

24.0 :

32:4

: Xy23:6X>y: :

0 <2

 : : : : 4:;>- < 5

: : 1:: : 1.00

4 3.00

0 4.19

.y.;.v.^..v.

25.2

NR

NR 31.0

NR 20:5

NR

NR

2 800

0 726

0 1242

 .-. ,. . . . . . . . .. 1

4

0

0

0

14.10 :::::: ::1 V '- V 5.20 ' ' ' ' ' ' ' '-' ' ' 'i

20:00 :::::: :::C

6.82 .... J ' ' ' 5-50^-'^ 4

360

I :::;:-.- 366

f 394

':::: 351

351

360

I 194

! 398

4

4

1

3

3

4

0

0

41
Table 11. Laboratory performance ratings for standard reference sample GWM-2 (ground-water major constituents)

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/13, number of reported values of 13 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Analyte = Alkalinity (as CaCOa) B (Boron) 

MPV = 253 mg/L 238 

F-pseudosigma = 9 14

Lab

1

5

8

11

12

13

16

18

24

25

26

30.1

30.2

33

34

42

43

46

48

59

64

68

69

76

83

85

86

89

100

102

109

119

134

136

138

140

141.1

141.2

142

145

146

151

158

180

191

204

208

212

215

218

220

221

234

235

236

241

246

247

254

255

OLR

3.5

2.7

1.9

3.0

1.3

3.0

2.8

2.6

3.4

1.5

3.4

1.8

3.0

3.3

2.0

1.8

3.7

3.2

1.8

3.0

3.6

2.1

3.4

3.8

2.8

3.7

2.9

3.3

2.4

3.0

3.5

3.2

3.5

1.0

3.4

3.0

1.8

1.3

2.5

3.3

2.0

3.7

3.3

3.0

3.1

2.8

2.3

3.2

1.5

1.0

3.0

3.1

3.6

2.0

3.0

2.7

3.0

2.9

3.3

2.7

V/13

13

11

13

13

6

12

12

8

11

13

11

6

1

7

2

5

9

13

12

10

8

7

9

4

10 ;

13

10

12

12

9

8

13

13

5

13

11

12

3

13

12

11

7

3

11

8

10

3

12

13

6

9

8

13

3

13

12

10

12

7

10

RV

257

:-x-x 252 x-x--

xxx;255Xx;:x

 -,,247.,,,,,-

xxx:264:x-"

y.,x246v-xx:

xx-x238x.xx,

: ' : 'x:259xx"

;x::: 262:: : ;>: x"

xx-x246-x: xx:

:xxx256:: : x : : : : :

 x-x-257-x-xx

P

xxx259'-:-:-:v:-

:x-x-252x::x:x

'',V 237-L.

" xx 258x-x--

,,x:253.x:x:

' '. 248, -

: x: x; 254-:xx:

260

x : : : x;258 :- : : ; : : :

,,,,.. 135-,-xxx

255

x ; : : x 252x:x: ' :

-,,x:257-x-x-,.

 252^---

260

Xx26Px -XX

x::: '230x: :':- :

X : X:23;i:vX;X

259 xxx 255 - - 

XXX245X- -:-::-

xx-253:x:x:v

268

xxx-247x: xx::

,,,,252,,,,,-:

200;

 x-x-252 x-: 

' ' 256,,,,,

xxx: 260X;::::

yXy257-:x:x

""'242:.-'--

y:-: ;X256x:::: >:

xx Rating

. .., .-.4..,.- . y. : ...y,.y. 4-,.Y.Y.

: ::x : x: x ; x4 /' 

,,,,.,,.,,.3-,,,,,

 - -

x-xxxxxsx-x,

,x:-x: xx-1xxxx

.".' '3' "

x-x-x-x-x-gx-x-xx:: x: xx:x:3x,xx

XyX-XyX:4yX,y

x:xx-xxx4-xxx

o

xx-x-xxx 3xx-x

xxx-x- : ' :: 4xxx-

,,,..,,,,,1,,,,,. -Y.Y.Y- :-::: 

x.x : x : x' : x: 4x:x: x-

-..'Y-XXX-SXX-X

:xxxxxx : 4xxx

xxxxxxx3-x-x: :

x:xxx:xx:3x: x:

x-x-xx-x-P.xx

4

XyX,yXy4 .yX

 x-::: : x: : :x4::: x :

' Y*-,,,

 ,,,,. .gV--Y

-x-xxxxxS.xx:

XX-X-XXX-QXXXyX-XyXy^xxx

-.-.-.Y.-.Y.Y.3 .

-,,,,,,,,,. 4 ,,,,

 ' : x-x : x : x : 3- : : ; : ::

xxxxxx-4:xxx

.., ! ,...

x:x:xxx :3:YX

xxxx-x-: 4x-x - - - 0 

4

xxxxx4xxx

-xx:-:-:-x-:-:-3 xx

:;:: x: x-x : ' : 4-x : : x

YY,.Y.Y,2,,.'v

x:xxxx:X4:: x: x

RV

235

244

202

243

355

230

250

269

230

201

247

226

240

237

236

200

252

54

250

245

238

244

262

230

210

233

237

255

225

249

244

230

257

Ca (Calcium) Cl (Chloride) DSRD (Dissolved Solids) F (Fluoride) 

u.g/L 68.4 mg/L 48.9 mg/L xxx 602 xxx mg/L xx: xx 1.18 mg/L Vv 2.s;v-v-v :..:.;.:: 2.0 '^:^t4;::;;::;:::::;:;:;;:::,::;v;:.;:' 0.09

Rating

4

4 ',

0

4

0

3

3

0

3

0

3

3

4

4

4 :

0

3

0

3

4

4

4

1

3

1

4

4

2

3

3

4

3

2

RV

X 68,5-x

62,8

X60:7

xx: 7-lxlx: :x

68.6

X68,6

65,6

69,8

:: 74:9

69,0

57^0 x

73,2

69;4

X : X :66;5v:X

: 71-9:

68,0

70:2

: x: : : 7:i-;3x: x

67,8

66:0

66;7;X

70,4

83,4

X 69-8

:67>0 x

68,3

68.0

68,4

18,4

68,9

66.5

X56,0

67.8

: : : 69,2X '-

y:,68;2xx

X69:0

66:6 X

:67,0

69:9

:xx62.1-;XX

70.0 :

66.5

67.6

:7P,5

72,8

66:5

75.1

68,0 x

69,9

68:0^

x:69,7

Rating

,y,.y,.y4,.y- .......'.'o.'.'.'.

XX-XXXgX-Xy,,:XyX2Xy

4

x-:xxx:x4X: x

:-,,x-:x:x2xx:

-',xxxx'3xx,

......... ^.....

4

vXyXy,0::x-:

 .-- . - - 

..'..'."'.'.4'.'.'.

Xy:yXy:;3XyX

XyXy,:y2;XyX '.'.'" .'-4 ...

. .,,3 ...

x.XyX-x-2v -x::

: x-::x : x : :4x^x'

,,,,,,,., -,.; .

" : :xx:x:x;3x: :-x :-

,,,. 3,,,,,.

-,-,,,,,,.0-,,,,

xx:xx: : : ' : 3x; : : x : '

x-,x-xx:3xxx:

,,,,,..,4-,,

x-:x:xvx4xxx :

xx: xxx4:x: x:

:xxxxx:P:xx^

. 4

3

yXyXy. 0: XXX

.....'..4''.'

:x:x-xx:4:xx-

; x: x : x ; : : x4x: x

xxx,,:x4 : : : ::

x:xxx : x3 x:x

::-:-:-: -x-x-3. xx

y.,,,,,,.3,,.y,

.yX : x-,X;px:X'

:-:::: : -:3x '..'.'.".. 3.

: x : x: xxx4':::' : xx: x: : : : : 3-xx:

^ xx-,:1xxx

,,.,,,,--, .

0

xx : ": xx:4'x:-

,y,,.y.y.3,y.y

. :...: .^4. : . :. :

x:x:xx 3x:-x

RV

47.2

48.2

45.0

50.0

47.0

47.7

47.0

48.4

47.0

49.3

46.8

50.3

49.2

42.0

48.0

49.1

52.5

50.0

49.5

47.0

49.6

48.7

47.3

55.3

49.0

46.4

49.4

48.2

50.0

47.0

46.8

51.1

49.3

53.0

49.0

50.0

48.4

47.7

48.5

51.0

62.0

51.5

48.3

48.1

49.9

49.9

46.8

48.4

49.6

Rating

3 :-xx

4 .' .

1 :

3 : ::::

3

3

3 : X: X

4 :-xx

3

4

2

3 -x-x

4

o

4

4

1

3 : X ; X

4 X-X

3 .'.'.'.

4

4 x

3

0

4 : ::

2 '''''.

4 x:

4 : 3

3

2

2

4

0 X

4 xx

3 '' :::

4 ;;X

3

4

2

0

2

4

4 x;:

3

3

2

4 - -/

4

RV

x: xx:621xxxxx

 iBti.V..,,.

xx:x610-x :: :

: : : x: : x604xxxx

580

588

: x : x::597x: : :x: x:

:yXy.588XXy:: x

560 '

591

610

x-x-6:12x:x:x

:XyX620:::xxx

 x 6:1.1x.x-x:-

: xxx6l4-:: : : : : : ;::

-x-:-:-:-6P3..xx:x:

589

599 xx'- 6qgxxxxx :-: : 585-xx-:,.

"'''592

-x-x-:612x--x:

: xxx596-x:x:x

587

x-x-x5g7:-:-x.x:

,: :,,, 578X-X-:-:-:

-:x:-x-592 .-. : 

.^^602 '''','."

6P1

608

,xxx-6i2: : : ::vx:

602

600

XXXX711 :-xxx

Rating RV

xxxx : - : xx2xxx:xx 1.22

,.,,.,,.,,,3,,,,.,^.

xxxxxx-x3-x-x-xxx 1>10

y:xxyxx:,4xxxxxx 1.09

x-:-:-:x:1 , : : :

3 1.04

-,,:y:xxxx4'XyX-xx -,_ 15

M^aMM 1.21

x : : : : : : x-x xxxxx 1.22

^0 ^ 1.24

.'""..:.v 3... v: ...

:xx : xxxxx: :xxx: :xx: : : 1.35

, , .3... ..,.,

::x:x.-x:3x-x---x : :-: 124

:x:yXyx;:x2: x: x: :xxx 1.30

:xx-,xxxx3x::-x'x:x; :- 1.24

:xx: x: x: xx3 :Xv:x:xx: 1.17

xxx:xxx4: :xx:x:xx: 1.10

1.30

3 1.16

-:xxx:xxxxx:-xxxx:-x 1.28

4 1.24

,,,y,,,,,,4,,,,,,,,, ^^

:xxx,,xx:2,xxx,,,,

3 1.16

-:::-: :x:xx- 3-x-x-xxx-: 1>17

: :xxxx: x: x4:xx::xx:- 1-28

, ...,,,,, 2. .,., 1.23

: : : 4 1 29

x-:::x:x:xx:x: :x:x :xx °-92

,,,,,.y,,.y.1y.y,.y,,.. 1.18

....................... ^ ^

3 1.24

x-xx : xxxxx; :xx ::: x: 1.08

''""..''.'' "'""V ^ 1.33

,,,,,,,,,,,,..,,,,.,... < 0.3

4^'^' 1-10

 x-xx:x:^x4xx-xx,x- ^ 16

' "''"'' '4'" '"'"

XXXXXXX : 3X: X: X::: 1.12

..'."4'.'.'.. 1.10

.4 1.13

: : : : :-: : : x-x-xx-x -x-x- 1.15

yXyX-XyXOvXyXyX 1.18

1 ^

Rating

4

3

3

1

4

4

4

3

1

3

2

3

4

3

2

4

2

3

3

4

4

2

3

2

0

4

4

3

2

1

0

3

4

3

3

3

4

4

3

42
Table 11. Laboratory performance ratings for standard reference sample GWM-2 (ground-water major constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/13, number of reported values of 13 possible values; RV, reported value; <. less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51-2.00 

greater than 2.00

Analyte = Alkalinity (as CaCO3) B (Boron)

MPV= 253 mg/L 238

F-pseudosigma = 9 14

Cl (Chloride) 

48.9 mg/L 

2.0

F (Fluoride) 

1.18 mg/L 

0.09

Lab OLR V/13 RV Rating RV Rating RV Rating RV Rating RV Rating RV Rating

283

284

287

292

294

1.5 

1.3 

1.8 

3.0 

2.3

13

12

10

11

7

225 58.5

67,0

714

45.1 1

55.5 0

4.0 0

47.7 3

50.3 3

646

1.20

1.40

1.30

1.07

0.97

297

300

1.7 

0.6 260 138:0

49.0

68.0 1.30

43
Table 11. Laboratory performance ratings for standard reference sample GWM-2 (ground-water major constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/13, number of reported values of 13 possible values; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51-2.00 

greater than 2.00

Analyte = K (Potassium) Mg (Magnesium) Na (Sodium) 

MPV = 4.46 mg/L 1 4.0 mg/L 117 mg/L 

F-pseudosigma = Q;4o: : 0.4 g

Lab

1

5

8

11

12

13

16

18 ;

24

25

26

30.1

30.2

33 ; x

34

42

43

46

48

59;

64

68

69

76

83

85

86

89

100

102

109

119

134

136

138

140

141.1

141.2

142

145

146

151

158

180

191

204

208

212

215

218

220

221

234

235

236

241

246

247

254

255

RV

4.44

Xv3:53x' x

xx: '3:80:x: : '

.xx4,1.3;:;:.

4.84

4.40::

;47Q

4,Qt

X:4;53 XX

x4>60 ;

X 4.53;;;;

4.40 4-50

x x4;63 ;;

4.90'

4.80

xx4,66- x :-

4,89

: - : : : :4;24:vX

4,57

4- 34

x:X4:i9::x:

4:28

3/90; ;;

4:85

4;00

x:4.39:-:-:x

4.1 q;

4.36

3.82;:

:4;47 ::

;; 4:08XX

: x4>75 x

4.06

xx4>47.;-Y.

4.59

 : : : : .v.<5.;:-

:..Y.-<,1.Y.Y

4:90

4.90 : 4.79; ;

4-40

4:24

5.00;x

4.66

472

4;20

.x : x4,43v:;:

Rating

..Y.Y.Y.4.Y.Y

 . : : : : : : -Q-:;:-:

xxxx:::ixxx

xx : xx: 3;xx

::..... V3...

xx : x:x4:xxx

 x : x: x: x3 xxx

'.'.'. '..i'.:::

 :-: - :: : 4 : :-: 

: x:::xx4 : :;:-:

xxxxx;4 xxx

;X;XXX4 XXxxxx'x4 xx

YX-x-x-4:::x; '" .'..2'''.'..

3

xxxxxsxxxx

..Y.YX-2XXX,

xxxxxsxxxx

.Y.YXx4,xxx ''''''''"'4'"''''

Y.Y.Y.Y 3Y.Y,:

XXXXX4XXXX

: -xxx2xxx

...,,3,.,,,

XYX'-X^'X-X

xxxxx4xx: x; -

V ..''''''''?C

4

xxxxx:i.xxxx

 4 -' "

; xxx: x : 3xx: x

x.xxx3x:xx:

xxxxx:3xxx

x; x:4-:xx

4

NR

0

 ' ; ' ' 2 " ' 

 : : : : 2 

:;x: xxx3xx: x:

,YX,x'4::v ,

xx:YXX3 xxx

x;x: x : :2xxx-

-. . . . ... -3, ,;.;.; ' ' ' ' '-" 3;;;;;

X;X: X;X; 3XYX

: x-x;xx4-x : : : x

RV

13.7

13.8

12.6

14.0

14.1

13.6

12.7

14.1

14.8

14.3

13.4

14.2

14.0

13.6

15.0

14.0

13.7

14.9

14.0

13.3

13.8

14.5

14.0

14.8

14.0

13.8

14.0

14.4

3.5

13.5

13.6

11.8

14.7

14.2

14.0

13.8

13.9

13.8

14.3

12.6

16.0

13.5

14.3

13.6

14.3

13.9

14.3

14.7

14.3

13.7

14.1

Rating

3

4

0

4

4

3

0

4

1

3

2

4

4

3

0

4

3

1

4

1

4

2

4

1 X

4

4

4

3

0

2

3

0

1

3

4

4

4

4

3

0

0

2

3

3

3

4

3

1

3

3

4

RV

116 ;

121

105

108

117

118

: x-xti7: x : x

X Y.1 21 X

126

123

xxx1: 1-6x:x ''V'122'.^

118

115

112

X:X-|26;:Y

x-x-11:4-x: : :

119

118

 116

118

x;x:xT1:4x: Y

122 "115V""

xx' : i21xxx

XYx'g&x-x

116

113

120

114 X

118

x : x: :to2 x::

127

118

129

119

x:xt17xx

116x

xx-122 'X-'

105

127

117

115

120

114

110

X ,1;11 X

122

'117

xx: :124xx

Rating

X-XX: : : 4;x;X;

'" $. . 

Y.Y.Y.YQY. .'.-.

: xxx::' :-ix: x ::

.Y.Y...'4-.x: "''''''"''4'''"'

: xx 'x x4:: x : :

: x:xx : ; 3x':x' 1

2

x-: : x: X'4x:X'

-^Y.Y,3v.,..

x:x:x4x 

'':'."':''*..'..'

XXXXV 2X ' V

:'x : ' : xx: : i : x: x : -

Y. : X;XX3: .Y

 . :. . ... 4... 

Y...,, 4 ,

x: xxx : .4x::

" ' ' ' " 4 ' ' ' 

.xxxxsx:

 X-XX-.3-:',;-

... '.-4.'-.'.

x-x:x::3xxx

: x: x'xxo xx-

-xxx: : : 4'X;:: :

AY...Y3..;V

. : .Y.YYg.v .Y

YXX ;3;,;;;

.Y.Y...'.4.-...Y XXX'X-QX-'---

x:-x1x-.'X-: ' ' ' ' " ;4V "

:o x

Y.-...- 4 ,.Y,

x;xx':4x;x:

:-x::x-:4.-;;;-;

x-X::x-3x-xxxx'xO:x :;: : -

;.Y .Y. 1.Y.Y.

'.'.' ...4 ...

xx,.:.4: ' 

XyXXXSXX:

; ;;s ' 2

x:.YXY2,. xx

. .:x-.'.-.3;:xY

^'^'''47^'

x:xxY2XYX

total Phosphorus as P 

0.20 mg/L 

0.03

RV

0.18

0.18

0.19

0.16

0.13

0.22

< 0.121

0.24

0.24

0.19

0.21

0.30

0.19

0.20

0.20

0.16

0.20

0.19

0.26

0.21

0.17

0.23

0.19

0.18

0.19

0.19

0.20

0.20

0.19

0.22

0.24

0.20

0.20

0.19

0.20

Rating

3

3

4

2

0

3

0

1

1

4

4

0

4

4

4

2

4

4

0

4

2

2

4

3

4

4

4

4

4

3

1

4

4

4

4

SiO2 (Sitica) S04 (Sulfate) Sp Cond (Specific Conductance) 

267x : : : mg/L x 93.6 mg/L x x : 934x:x x (iS/cm x x x x x: x x

...... 1 .8 .................. 4.0 ... . . .,, .,..26, ,., .Y.Y.Y.Y.Y.Y. .Y. Y.'.

RV

X25.6 ;

26.3 ;

;;;26,4 V '::

X :X2i:9::v

27.7

:::::x28;4xx

31.5

28.2

26f

YYY26: 2V-V

"V27.4V:

 XXX26,3.;:;:

24.2

26.6

26.8

287

24.5

26.0;

27:1

26.4

26,9

x3p,4x:

26.3

XXXX27.3XXX

28.8

28.5

27.3

: x : x : xi9::2 :x:

26:0

 19.9

25,7

27:3

30.2;

24.6

3o:Y

Rating

xx: x : x : :3:x:x-'

. . . ;.;.;,.4,;.;.;,

 4 

x:xx-x-0xxx

xx:x,3;.::,;

x:x::::3>:: x-:

0 ;.;.;

3

Y.Y.Y - . . -

' ..V.4.V

.V '4

x-X:-:4.:x2

4

x-.:x::-4:-x:x "".".' 2''' xx

XY--::-2 x-x

x-.-xxx4x-xx: '.' .'..'.4.'."..

: : x:x: : : 4:x: x

XXXX.4;x.;;,

xxxxx'O:;:;:

.'4 ...

X: X : X:X4 XX: X :

 : : : 2 ' ' "

 : : X-2XX-:

....'. 4....

 XXXXQ-XXX

 : :-xx4 ::YX

 : :x::0.xx-:

........3.....

Y:xxx:4-x:'

; x : x : xxi.: xxx

.,,,,. x2.;,,,

....... _...

RV

91.4

85.1

93.0

93.0

105.0

93.9

78.7

92.7

84.5

94.0

91.2

107.0

100.6

91.4

97.3

99.0

84.4

93.5

102.0

93.0

95.3

88.4

93.4

93.7

92.1

101.0

95.0

95.9

90.8

93.8

93.6

103.0

102.0

87.8

93.0

90.0

105.0

93.0

96.6

66.7

80.8

91.5

96.5

412.0

96.8

88.1

94.1

88.5

95.2

90.0

94.2

Rating

3 x

0 ;

4

4

0 ;.::

4 x

0

4 -: x : o

4

3

0

1

3

3

2

0

4

0

4

4

2 ;

4

4

4

1

4

3

3 : : :

4

4

0 x;

0

2

4

3

0

4

3

0

0

3 X

3

0

3 :

2

4

2 ;

4

3

4 : : :;

RV

. x:xx: : : 937yX: x:XY

x:xxx,935. ::::; :

.'.V.V.V. 883

-xx:xxg20xx--x:x

X- :X:::X69.1;X;XXXX:;

: :XX : X : X-:-944;.;X;X;X: X

i.. ' '.. 942 Y'Y --.-. 2J4 Y ..-.-. .

: :-x' ::x; x: 940x: : x x x x:

. Y.Y.Y.;.922/;-;:;.;:;-;.

950

..'r^870^,,',Y

::::: x'x : :-924-:x:x:x:

XX X.XX934,.;.; .,.;.;.;;

 ' ' . ' YiSSOY^Y-..

X:xx:x945 ''"'' ' '

xxx :: - : x: :939x' x:x- v -

x:x;x: : : . :x94q.v:;:;:::;:;::

;....:.V928.........

.Y.Y. : .Y.Y.Q68,,-:.. -.-. . .

: xxx: xx:: 935;.: :;:;:;::vX

' ' '.. Y''-939vV,,,,,,

- - - 952 - 

929

xx :::xx: 937xxxxxx

. . . . . . . . 929-xx-x-:x:

 - -gg2 ;;;;; ";

xxxx::::9n: xxxx:::

::-x: xx: 959::;:':y:;.: : 

.Y-Y-.Y948,,,,,,,,,

:xx:;:; 946x: x x: x: x

XX XX: 929 -;.;;:;-;-;.;.

828

 x-x xx-g24x-xxxx: : : x-.xx: :944v:;:x : : : x: :

XXXXYX-874 V;.Y;Y:

906

.Y ;..;.;... 903. ;:;.;.;.;.;,-

"'V'"'v99«r ''!'''

:xx: :YXXx : x;g;xx---xx

.,:.,,, , 952.Y.Y.Y.,Y

: x: : : .XYX-94o: x xx x-x : Y.-... . . . . 79Q:.;.x-X'X x X-X--XY-Q2Q-------'-------

x; xxxx: 952:x : x:x: x :

1030

Rating

x.: :Y:xxxx4x: :;X--xxxxx:

XXX-XYXXX4XX,XXXXXX. ".^'.'.^2^"'^'..!'.

 .. ;..- Y.Y^.Y.Y... Y. "Y.Y

x-xxxxxxxoxxxxxxxxx:-:

x: x: xxx; x: : : : :4 : - : xx::x: xx: : x: -

- . .-. ,,.-.-,,.-,.4,,,,,,,,,, v ;;, ;; ;; ;' '"v'2''^'^" :;

:XYX; x:XYx:4x:xxxxxxxx

:xxxxx:x:x4.: :xxx:xxxxx

.............4..............

 '.. ' .. . . 2,,,,,,,,,,,,,,

: : x-x:x:x-: 4 x^xxxxxx:-

.,..;..;.;.;... Y. : 4.Y.: .Y.: .Y.XXYX

.-.'. .. 4. Y.'.Y.YY .::.-

^^^^4 ::::^'::.

............... .^ ..............

XY.XX-XXXY4.YXYXYXXXX.

.....4..... .. ,,,.

x:xxxxYvx: 3-xxx-:xxxxx'-

XXXXYXYY^XXXXYXXX:-

XXXXXYXX4,,,.XXXXXX.

....................................

.. ..... 4 ...

xxxxxxxx^-xxxxxxxx

xx-,.xxx,,.4;x:YXXxxX': '^' ^''j''!'^'''''.

 - x:x-x-::4-x:x:x-'--YXX

x: xxx;x: : ; : : x-3-;x,-x:;:x::xx :

,,,,x:xxx:x:4,xxYXx:xxx

:xxxxxxxx4x: xxx : : : - ::- : ' : - ; - :

: xxxYYX;4xxxxx:x:x: x-

.....Y.-;.Q,,,,,,,.Y.Y.-.. XXXXXXXY^XXXY-XX - - 

x : x; x; : : : :::: ; : : : :4x;:: ::x::: - ::'

:XYXYXYXY.2XX;XYXYXYX

. ... 3... ...

xxxx..xxx:3;.x:;, v ; ;:;:;: '..''^..'^2^''. .:...

x'-:x:xx-x-0'--'X:x-x:xY

?''^: ;;'Y.4.'vYY'YY--.

XY.YXXXX^-Y.YXXXXXX

XXXX::YXX:-P;XXXXX:XXX: "'^'^^4^^''''-Y.

x-::x:x;x:4x-x:x---XYx:-

 .-. . .-. . .0.-.-.-.-.-.-.---.-.YX44
Table 11. Laboratory performance ratings for standard reference sample GWM-2 (ground-water major constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/13, number of reported values of 13 possible values; RV, reported value; <. less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-valua 

1.51 -2.00 

greater than 2. 00

Analyte = K (Potassium)

MPV = . : . : . : ! : ' : . :4.(46:; 

F-pseudosigma = 0:40

Mg (Magnesium) 

14.0 mg/L 

0.4

total Phosphorus as P 

0.20 mg/L 

0.03

SO4 (Sulfate) 

93.6 mg/L 

4.0

RV Rating RV Rating Rating RV Rating RV Rating Rating

283

284

287

292

3.48

4.87 

;7;4Q

4.40

15.2

15.0

14.0

14.2

0.27

0.65

0.55

0.22

0.03

29,8

10.9

29:9

89.7 

<5 

93.0 

93.7 

93.9

297

300

4:10

8:20

14.4

21.6

0.62 125.9

127.0

906

45
Table 12. Laboratory performance ratings for standard reference sample AMW-4 (acid mine water constituents)

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter, Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Rating

4 (Excellent)

3 (Good)

2 (Satisfactory)

Analyte =

MPV =

Absolute Z-value

0.00

0.51

1.01

Ag (Silver)

,.;.;.;, 69.Q

-0.50

-1.00

-1.50

Rating

1 (Marginal)

0 (Unsatisfactory)

NR (Not Rated)

x x x: : Al (Aluminium) As

lig/Lxxx

F-pseudosigma = " " ' 11.3

Lab

1

4

5

8

11

12

16

18

25

30.1

30.2

34

42

43

46

48

59

69

85

86

89

100

105

127

134

136

140

141

148

149

212

215

235

237

241

246

247

253

254

283

284

297

OLR V/26

3.3 22

2.2 21

3.2 22

2.3 22

1.9 21

1.8 6

3.0 22

3.0 22

1.5 21

3.2 22

2.5 4

3.0 3

1.8 15

2.9 7

3.7 19

2.1 21

3.2 18

3.1 17

3.5 15

3.1 14

2.8 19

3.1 24

3.3 24

2.4 24

3.5 24

0.8 10

2.7 15

1.3 21

3.3 19

1.9 10

2.5 20

2.6 22

2.3 13

2.3 18

2.1 21

2.7 22

3.1 24

1.0 6

3.8 15

2.7 24

1.7 23

1.2 10

RV

,x:x:-76,3.:x::-,.

x : x: x: :7b-o:: :-: : : x : : :'"

XYX-X2'2:OXXX: X-

^^38;8,YYYY.

X 88.0

 x-x-x-64,0:x:x:

69.0

 xx: x- ::< 'Q-x x- - ' 

69.0

:x'-: x: :78:5x '-: ' x:

x-x-x-,59,8xx-x-x

x: x: x:66:0:v'::>: : :-

61X0 X

7o;o ' x : ' : x: : : : :6i: :: i : x : x: x : x

77,0 x:

x 69,0

89.0 x: x : xm5;'':v -

 :-: : 1:10:0 x:

64.0

xx:70,0 x x:

86.2

x:x:X6&4- : ':::';::

..54,0

8CLQ

83;3

: X56.0 '^'.

81.2 ::-x-'-g 5^3-x :-: " ' 

23:0 74.0 : :-:-:-: : 

Rating

Y-XXSXXX

:x:-4x-:-x--

:x :0 - ;,

0

1

XXY4-X-X-. '.'.'4'.'

 ' X-XQ-'-X-X

-X-X-4-X-X-:

:: x: X3X; :xx

xx-:3 -x:

: ' : x: : :4: x- : x

x-.-x-3.x-x: 4- - - - - 

 x:x3: - : x: :

 .-.- 3.Y.,,.

::.: . : .4x: .. : : :

.1.

x::-:4-::x:

XXXQXXY:

.V.V.4.V...

:x:4::xx

,.Y,,IY..Y. -X-X-4X-: 1

2

x-XY3xxxx

x:x2xx:x

: xx : 2: x: : ; x

,x:,2,xx - - -4 

0

::: 4-x

29200

1760

RV

29100

28934

30100

28000

26000

29300

28000

29400

25000

27226

29600

29600

13

28400

29500

30400

28100

29571

27800

29300

30600

24798

27000

29200

30000

30400

29500

30900

30160

27100

24300

29800

31600

22000

ng/L

Rating

4 :: : : :

4

3

3 xxx-:

1

4 XX

3 Y YY

4 x-x-:-:

0 x-xx:

2 x-xx

4 :: ::

4 :- 

0

4 : :: ::

4 xxx: 3 '"''

3 -,,: :-

4 ,: ::- 

3

4 : : :-::

3 xxx

0 .,:-:-:-

2

4

4

3

4

3

3

2

0

4 ,:-<

2

0

Absolute Z-value

1.51 -2.00

greater than 2.00

(Arsenic) B (Boron) Ba (Barium)

168

30

RV

203

198

X 15

164

159

166

168

<50

190

35

135

23

172

191

215

168

196

172

189

884

174

163

150

127

175

166

192

133

1110 .'.'i'5'5

102

Hg/L insuff. data : : 9:23 ::

Rating RV

::x:x::-x:x. ::: : : <40

.Y-Y-Y.YY^.VYY.

2 < 10

xxx : x : x: x : '0'x: x: <20

,...- ..., .4.. .-,.

-..,.,.. . - :4- -..-..,

:::x::YXY.4-xx:Y: 157

,,,..,,,,,,,4,,, , <50

x-x XX-X-XQ x::-: < 23

:xx:-:::xx-3xxx : 23

: x : x: : : x: ::x: °::: - :: - : 15

x-x-x-:- x::-2 - 

:-: ::- x:x:-0-:::x- 28

............4 ... -x-x-x-:x-x-:3 x:-xYXY.YXYX-XX.Y.Y, 510

1

4 464 '" ' " "" "3" '"

-x-'-x-:xx--x:4; x-x- 22

: : :3 219

0 247

;.;,,.;.. Y...Y.4, ,.,.;.; 192

Y..: .'.'...Y.Y.4.Y,,.

3 X X < 200

2 40

: x: x;x: : :x:: ;: : :4::;x:> 91

373

XXXXXXXY4 XXXX

::,,x-:-x-,x-3:-x:::: 38

-^- Y.Y--Y2-Y-YY. 32

NR oo

4 22

0

3.60

Rating p^y

NR 136.60

NR : ;;;;;;;^':4x;x;;

NR < 20

NR meo

NR 880

NR <Q7

NR : 11:00 ::::

NR 8.30

NR 6:60

8.90

NR 8,00

8.55

<50

NR 9.26

9,00

NR 8:17

NR 9,23

NR 13.40

260,00

NR x< 10

< 10

10:00

NR 7.20

NR 30.00

NR 11.00

NR 14:00

1400

NR 9X10

NR 7,96

NR ::x:x:x: x:::x: x : : NR 8.60

28.00

mil

Rating

 x-x- 0-: :-:

NR

NR

x::: x4:-::x: - :

 x:,,.4x:,,. ' ' ' " o

xxx 4;:v : :

:::x:4: x:x

 ' x::-:3- xx

.,,,,4,;.-,.

:-x:x4::x:

4

NR

:xxx4x:x ...'.'.'.4.'.'.'."

:x:xx4x: x :

-:x:-::4xx,

,..,,,2;.,,. X-X-XQ'-X:

NR

NR :: : :-: 4 x-xxxx3 .: : :

.....9..... XX-X-4-XXx-:-x-:2x:x-

'..'...2.'.'.'.

:x::-4x::-x

.-,..-,4-,,.-,.

4

0

Be (Beryllium)

38.0

3.3

RV

39.9

35.9

38.9

37.0

35.3

32.8

40.0

39.6

43.0

19.7

39.3

30.0

30.7

36.5

38.0

38.4

32.3

< 1

38.0

34.0

39.2

35.6

39.6

26.0

36.0

47.0

40.0

45.6

37.0

39.7

74.0

H9/L

Rating

3

3

4

4

3

1

3

4

1

0

4

0

0

4

4

4

1

0

4

2

4

3

4

0

3

0

3

0

4

3

0

46
Table 12. Laboratory performance ratings for standard reference sample AMW-4 (acid mine water constituents)-Continued

(MPV, most probable value; ng/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reportad values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Ca (Calcium) x :x 

338 mg/L

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Cd (Cadmium) 

175 ng/L 

18

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Co (Cobalt) x xx 

165 ng/L

Absolute Z-value 

1.51 -2.00 

greatar than 2.00

Cr (Chromium) 

120 ng/L 

18

Cu (Copper) 

6120 ..Y.Y.JIJJ/L

Fe (Iron) 

188 mg/L

i 12

K (Potassium) xx x 

3;58 mg/L xx

Lab RV Rating RV Rating Rating RV Rating RV Rating RV Rating RV Rating

1

4

5

8

1 1

12 . : : 16 ":':'.

18 x:

25

30.1

30.2

34

42

43

46

48

59

69

85

86 :

89

100

105

127

134

136

140

141

146 ;

149

212

215 : 235

237

241

246

247

253

254

283

284

297

338 ., .;:

350

xxx31.2xx:: x

307

290

.V''335T"'

xxx-3 17xxxY

x : x.374:xxx: 270

329

: :->: 338-x ::-:-:

: : : : 342 -:xx:

354

; x; : :X339x ::v::

,,: : 323 :: . : 

' v' v '328r''

x:: x : 353x: x: x

 406 x ,. : 

 345-- 

^x: :-324:::v:v

298

348

-x:x31.Qv x-:x

288

xxjxsogxxxx

86

339

YXx34Qxxxx

398

X : Xv356-' : ' : ' : ' v

373 : : .--.

314 x:x350: x-x ::-

: :: x340Vx-x;

x; x: :295"xxx

:-,x-:324.x-xx

368

Y.Y .-,,4. .Y.Y x-xx-:4x--xx

.xxxx3xxx : x

^:..2..V.;V.

XXXYX-I-XXX:

"""4.'.'.'.'.'.

x : xxx3: x : x: x

x-x-: 2.:xxP

4

xxxx4YXX

xx: : x.4-x:X'

..:..v3.,,, X'XX-4'XXX'--- 4.y.y.

,:,.-.-, 4

: x; xx:: 3::;::::

Y.Y.Y.O.Y.Y. xxxx.4x---

yXyX 4x : x: x

 -2!..,.

y.Y.Y,4.Y.Y.-.

.Y.Y.Y.3 Y.Y . 

,, -.- :: 

xxxy^xxx

0

4

: x : xx::4x: :xx

......D...... ' '- '- ' -'W-://'

:::::: x2' : .:x:

....... g.

:xxxx4: ' : xx:

.-.-: x4 .--Y.

x: x:x2-:-x:::

v.-. .Y4XXX.

Y.Y.. Y2 '.Y.Y

186

188

171

159

138

161

162

159

185

185

191

156

168

163

174

186

191

189

178

166

162

177

193

180

152

170

180

140

147

177

177

199

186

172

300

160

184

150

3

3

4

3

0

3

3

3

3

3

3

2

4

3

4

3

3

3

4

3

3

4

3

4

2

4

4

1

1

4

4

2

3

4

0

3

4

2

x: : : xxx183xxx:-

180

: : x : : : x :xi65; : : :': : : : : x

xx-::X: l7.i:x:x-. ^"'w:;;

Y,Yx1-4&xxx:

167

; x : x:x:i:70:: : : : x: x:

XX 170

XXXX.Yl.37.yx-X'

x : ' : x : x;i:63 :::::' xxxxx :1:1;7xxxxx

170

xxxxx1.5&y:v:y:

171

:: - : - vxT67xvv - XXXXXt&tXXXY.

190

249

153

164

120

170

::x::: :: :-136.y:y;x

158

166

Y'Y'Y-JTOY/YY.

154

10QX

XXX.2XXX- ::.:'..2^'

x : xx: : 4x::::

xxxx4xxx- ;;;\.2';;;;;

 ..Y..2.Y.Y.. ' : -' ' 4'; : '^'

x: x; x :4xxx : :

xxx-4 x:

..Y.Y.: 1. : ...Y. :

xxx : : 4:xxx

xx: xO;xxx :

.;.;.;.;.;. 4-.-.'.-..

xxxx4xx:x 'Y'-Y^Y'.V.

"X/x A '

xxY,:4yxx '..'.. '!'.'.'.'..

.Y.Y.YQ.Y.Y.Y

 ' - ' SY^Y. 4- v - 

0

x:xx- 4xx-xx

XXX:lXXXy

 -..-.-. 4y.;.yY

 4 

...4.......

XX- 3YX->X0

135

1995

144

120

110

101

114

116

125

103

99

121

86

93

120

160

137

115

125

123

120

194

170

115

112

160

86

133

136

8

110

120

130

135

350

3

0

2

4

3

2

4

4

4

3

2

4

1

2

4

0

3

4

4

4

4

0

0

4

4

0

1

3

3

0

3

4

3

3

0

6320

7397

:::'x636Q ::x:

X X5600XX X

5610

5500

:6192 XX

5900

6720

6300 X

xxx : x5592yx:x':

6060"

X 6170

6100

6450

xxx: :6520.x:yx6220

6420

X5770 X X

6050

5390 X

6425

4837

6100

X 5470 X X

5940^ i

X 6400 X

6346y x

6550

-xxx5860-:x;x:

6416

6010

6264 XX

5810

; XyX-5750XXXX

6240

5770

6140

.-X-X--4-X-X

-YY.-Q...-Y

X-'-XXgX-XX

x: xx:: 2.xx : x

:::.':. 2...'.'.

Y.Y.Y.2Y.Y. : .Y

xxxx4.Y,x- Z''4''^

xxx:- 2 -x-x-

-:::: >: : :4,x: xXyXY2yXYX

,:.-:.. 4 ,. .-,.-.-

:XXy:4;XyXy

4

 x-:-x-:3x-x- x

-X-X-X3X-X-X A ".'.'.'

 .-. X3-.-X-X

 ::X:X3XXX-: -Y.Y.Y^.Y. ' 

 XyX-:i:x ; x; :-

 -. -3Y.Y.-..

0

: x:::x4':::XY

Y.Y.Y.2;vyyy ""4:'x"

. :xxx:3: x : --'::

 ...Y.Y3.Y.Y.Y

xxxx3xxx-x

:xxx 3: : x :x: - ;-

. .V.3.V..,.

:-'x-x :4x-x:-:-:

X-X:.-4.y,,,, 3--

x: xx:-3: 'v:: : : x

Y.Y.Y.4.Y.Y.. Y.Y.-Y.-.Y.-

x-xx 4 -.-xx:

188

172

182

169

143

174

180

19

186

193

193

188

215

188

192

188

195

191

182

170

192

192

167

159

197

191

187

209

205

194

172

195

190

0

179

195

4

2

4

1

0

2

3

0

4

4

4

4

0

4

4

4

3

4

4

2

4

4

1

0

3

4

4

1

2

3

2

3

4

0

3

3

..xx-,.3.46,;x:x

4.80 . xxxx2;2-2-XYX-

: XXX : X3:Bb:X: XX

 ' 3M-.-.-.-.-.

: xxx:x3£0:x'xx

3;30

 x-x4;35xxx:

3.20

3:eo

XX3.78 ::

3: 80xYX

3.93

: - : :xx:x3,57^x>x

3;4.Q

3;52

xxxx-3.:64:x:xx

3,58 ' ' v;2;:82: ' ::: ' ::

.Y..Y.Y. 3; 53 : : : . 

: ::: : ':::3.60r: 'Vv

xxx:-x3x09'xxx-

 '.' Y3;58.,,, v . 3:50

: xxxx<-:10>:xx::

' ' S-lY.Y.Y.

" ''"" 3^1 0'^^

xxx:-x3,73xxx:-

.' 4,04

xx-xx:3.50xxxx

3.65

3.70

x-x: x :3.42:x::x

: : : : -:-3. : : : : :

' 'Y.Y.O.VY,.

: : Q '

xxxxxS'xxx:

0

XXXX.4XXX- ::. !.: .^. : .... :

xx-xx:0xxx-

: xxxxl-x,

Y.Y.Y.^Y.Yxxxx::3x:x: x

. .Y...Y3..Y.-.-.

x:Y'-x-:tx:x:x

: x: :xx:4xx:: x:

'.'. . it ...

. ... 4 ...

xxxx:4xxx::

::: v.4v..v: : x : xxxo;:::x

XyXX4X;X: X

; xxYX4YX:XY

: : : : : : ::::p-::'v:x

.... .4.......

 XXX-4YXYX-

'..'.'...to.'.'..... xxNRxx

;;;xO;;^

xxx-x-3xxxx:

....... 1.....Y.

 XXXX4-XYX-,

 ,,.-,,.- ,,. .-. 

3

: xxxx:3xx:x:- :

47
Table 12. Laboratory performance ratings for standard reference sample AMW-4 (acid mine water constituents)--Continued

(MPV, most probable value; ng/L, micrograms per litar; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Rating Absolute Z-value 

4 (Excellent) 0.00 - 0.50 

3 (Good) 0.51-1.00 

2 (Satisfactory) 1.01-1.50

Analyte = Li (Lithium) x Mg (Magnesium) 

MPV = x 68.3 x fig/1- 1 25 mg/L 

F-pseudosigma = 2.0 8

Lab RV Rating RV

1 874 x Ox xx 126 

4 x 64;2 2 121 

5 xxxx:68.3x;xxxxxx:4; x: x:": us 

8 60:0 -.Y.Y.........-.-.-Q. ......... 120 

11 69;5 4 113

12xxx X.X.X.XXX-XXX.XXY-. 

16 Y. ., XX.XX-XY.XXXXXX-XX 127 

18 115 

25 X 82;0 0 141 

30.1 70:0 XX 4 121

30.2 134

34 X-XXX.XXX..XXX. XXXXYXXXX

42 ''' 7""''777v.Y.Y...

43..; x: xx:;XYX: xxxYX-xxxx.xx 12s 

46-. v.v... Y,,.. ............ Y.Y.XXX-XXX 126

48 138

gg .. ..XXX..XY.-/XX.X...Y.Y.Y....X..;. ^3^

69 70.0 X 4 127

85 : : ' : ' V ' : '7V'7' '7'' '"''' - ' -Y'Y 126

86 .: ; : :V: : ;X.: : :.X-XX-X.X.X-X.X.XY - 133

89,.xxx: x : x; xxxx: xx:xxxxx:: x.- :: 132 

1 00 V.'.'.'.'.'. 68.0...... ...-. . ... 4...,,, 107 

105 70.0 : 4 115 

127 x 59.0 xxx X Ox 125 

134 67,3 4 124

136 -x-x-x-.x-x- V.V.Y.Y.Y.Y. - -

140 XX XX 12°

141 59.5 0 109

146 x.xxx: xxxxx: x: xx: ' : x; xxxxx : x 120 

149 106

212 131

215 xxx; x: x : :x: : x:-::x: x: x : x: x : - : vv:" 129 

235 ,''...,,,,,,,,. , V X.X-XY.XX : XX 

237 76:0 X 0 116 

241 ..YX-XXXX: XX: X:X.XXXXX:V: -V- : - : 128

246 67.5 X x4x X 106 

247 684 "47 134

253.xxxxx: xxxxxxxxx : XYX:::- ::: - : 254 .. 128 

283 70:2 3 122

284x;xX;X;X: x : : ; :YX : x;:..: x-x: xxx 120 

297 139

Rating

4 

4 

3 

3 

2

4 

2 

1 

4

2

4 

4

1 

3 

4 

4 

3

3 

0 

2 

4 

4

3 

1 

3 

0

3 

4

2 

4

0 

2

4 

4

3 

1

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Mn (Manganese) 

106 mg/L

.... .xx...x-xx7x-x: xxx: xxxx ::x.

RV

x x x 104

..... , ; 92 

102 

XX: XX102 

102

100

........ & 

: 403

112 x : : 109

XXX XX116 

x 108

xxx:: xx108 

110

106

;94 

95 

x xx 111

106

XXX;.XX;X87

104

XX XX113 

108

88

xxxxxxx-97

xxxxxxxi08 

106

105

Rating

 X-X..Y.. -4

xxxxxx.Px.x

"'... 3-..:

x.xxxxx: 3xxx:

. .... -. : 3...: ..

......... 3,.. v 

............. ^

x-'X-x-x-x-g-x::. 

xxx.xxx: ::4:x:x;

4

 . xxxxx.xtxx:. . Y.Y.Y. ..Y^.. 

xx.xxx::x:3-: xx:

... Y.Y.Y.Y.4 . -. 

. ..... .3....

XYX-XXXX O-XX..

XYXXXX...4XX: 

.XYXYXXX2XYX

.......... ......... 0.........

......;.;.-.;.;. 2.Y.Y.

4

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Mo (Molybdenum) 

108 tig/L 

19

RV Rating

117 

98 

109 

108 

98

122 

155

138

26 

124

124

103 

118 

72 

91

339

92

108

122

44 

134

105 

105

93

354

4 

3 

4 

4 

3

3 

0

1

0 

3

3

4 

3 

1 

3

0

3 

4

3

0 

2

4 

4

3

0

Nax(Sodium) x ; 

22.7 mg/L

RV

22,5

xxx. ..23.6.x. 

X 20-5

X200.0 X 

16,0

22:0

x: xxx24.8Xx 

21.0

30.0

 xxxl9;5xx 

227

22.6

X: X: X-21:3xx

..-.Y... 21. l.Y.

xx':21; :.9:x

x.xxx22,4Xx 

24.2

19;6X

22.7

 Y.Y.--23.2xx 

65:5 

xx : x.-.23,9XX 

22.0

25,8

 XXXX23..0: X:

22.3

X23.Q

Y. ; .Y..22.3.x.;

: 23,6 

26.0

Rating

4

xxx::x: :3x: xx

XXX.,.X3.Y.XX 

 XXXX-3XX

X X-XXXXX.2-".".". X.

... 2

0

....... . Y... 4,. .Y.

:xxxxx:3:xxx

........... ,.3....... 

 '. YY2YYV

x.x-:-x: xP: : : x: x- "".'.'..'.4'.'.'...

Y-.-.-.x : : : 4x: x-x 

x: xxx"x3xx-x'

0

x:x:xx 4'; : : x-x 

: ' : x: xxx4xx:x:

.....-X-X-4.-XY

 '4 

......Y.......4..,.....

XXXXX.3XX.

o

Ni (Nickel) 

269 

22

RV

279 

256 

272 

162 

233

264 

268 

<49 

280

48 

269

185 

288 

344 

270

269 

309 

287 

261 

274

392 

260 

157 

271 

400

293 

267 

209 

310 

40

276 

295 

360 

260 

261

26

W/L

Rating

4 

3 

4 

0 

1

4 

4 

0 

4

0 

4

0 

3 

0 

4

4 

1 

3 

4 

4

0 

4 

0 

4 

0

2 

4 

0 

1 

0

4 

2 

0 

4 

4

0

Pb (Lead)

RV

41.5

: : : xx:;32.4: x: x

22.0

'7.'V36.0x^X

X 34:0

xxx-X37,8-x: x

x-xxx35;:°xxx

. :xxxx33x6: '::x

475.0 xp-ib-p'1 '

30:0 XX

19.6

x xx:X33.p : x: : : 

.....Y,<25x.x. 

59.1

X X<60 

36v5 VVV'14X2'" 

< 100

38.0

30.0

-..,x: .54:6x; x: :

' ML xx

Rating

-xxxx4x: xx: 

NR

xxx: : : :4x: : : : : x 

 Y.-.-.4..... 

NR

:x:xxx.3x:xx:

:xx.XY4x.xx. -' ' ' ' ' ' ' 4-'"" 

: : xxxx2: x; : : x

0

.YX.XY4.vX;.

:xx.XY4x.xx: 

X-X.X-XSXXXY:

O:....Y.

.'.'.' .'.'.'.9.. ' .-.

YX-XY'^X-X-XNR

':... v:.o. ::.'.':

.... ... .-.- .. .

: x;x: xNR :: "

 xS-x-xx

4

xxx:x..oxx: x:

48
Table 12. Laboratory performance ratings for standard reference sample AMW-4 (acid mine water constituents)-Continued

(MPV, most probable value; ^.g/L, micrograms per liter; mg/L, milligrams per liter; Lab, laboratory number; OLR, overall laboratory rating for all reported values; 

V/26, number of reported values of 26 possible values; RV, reported value; <, less than.)

Analyte = 

MPV = 

F-pseudosigma =

Lab

1 

4 

5 

8 

11

12 

16 

18 

25 

30.1

30.2 

34 

42 

43 

46

48 

59 

69 

85 

86

89 

100 

105 

127 

134

136 

140 

141 

146 

149

212 

215 

235 

237 

241

246 

247 

253 

254 

283

284 

297

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Sb {Antimony) 

2X77 jig

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Se (Selenium) 

/L ...... insuff. data ng/L

RV Rating

; .y.y,.2.2Qy.: .yX: Xy.

400 xxx"-jxQOxxxxx---

x : x: x<51XyXyXX. 

2.70

SIS

3.00

.y..y.y.y<5,yXyXyX;

xxx3xDD

;v.v.v.4.29 ...,..,..,

265.00

2.40

X : X : XXX<7: XXX : XXX

xx 4.40

< 85

x: : ; x::2.96vx: xx :"-

xx;:y2,00;xxx,xx:

NR

xSxxx

.2......

NR4 '''

NR

4 

NR

NR.y4.;.y.Y

x4xx-x

 \ -.-...

 ,2y.y,,

0 

NR

4 

NR

XlX.-.X

NR

X4xx; x

X3XXX

RV

<2

0.1 

40.0

63.0

<129 

5.0

2.6

<0.4 

0.0 

<5

<2

14.0 

<7 

<3 

2.4

806.0

<2

< 10

9.3

<7

<5

<80 

<5

<5

2.0

Rating

NR

NR 

NR 

NR

NR 

NR 

NR 

NR

NR

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR

NR 

NR

NR 

NR

NR

NR 

NR

NR

NR

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Si02 y(SHica) 

x 52.3 x mg/Lxx

.- ' ' 3,3v 'v' . , : . ... ,.-.Y.V

RV

51.1

..-.Y.Y.51.3Y.XXXX - - v- 52:4" ' ' ; ;

:-xxxx5lx9 : x : xx:: 

45.7

.'mo

;:.;;._ 52. i..v..;v y.

.....58.5 .......

xxx: . : 50.7xxxx: 55:2

tS2;:;

xxx-540xxxxx 

48,-!

53.8

 . XyX : :S6:5.yXyXy

53;0 

59.9

46V1

Rating

 :4x-xxx-4xxx 4 

XX4XXX

1

0

II

Xv4v:.X

...1.'

: Xy4X;Xy

::. 3x:x

: ;2;;;;;

 . -. .: ,.,3,.-.X

4

X'. jjyX-X

0

 :.-.4-.v.

0

1

Absolute Z-value 

1.51 -2.00 

greater than 2.00

Sr (Strontium) 

1473 ng/L 

64

RV Rating

1413 3 

1684 0 

1520 3 

1270 0 

1471 4

1361 1 

1380 2 

1600 1 

1500 4

1480 4 

1470 4

1475 4 

1450 4 

1240 0 

1489 4

1870 0 

1487 4

1401 2 

1430 3

1490 4 

1420 3

2596 0

V (Vanadium)

x x 11Sx x jxg/Lx x

RV Rating

109 : 4

XXXXX132 :XX: X : X: X2X;X;X

108 ';.;;.;..>. . - . .:xioe-:;:-x-x:x-x-3yX--- 

108 3

.......,,124.,...:: .y.,..: 3. : . : .y.

sip

192 ..P

X 207 0

. .-.-.-. -lbaxxxxxxx:3xx:

.::.'125;;.;;;:;3;;;.

..........gg.... ...... g,..,,..

131 3

XXXXy124Xy X^^X^^vX^

X : X. : X : X88.;X;:,.yXyXyt: :yX: 

.. ...330... ..;.;.;.., : Py.;,.. : .

:XX: X;Xv92yXyXyX:Xyt: X;Xy

 xx xl 16xxx- 4 .-. 

125 3

170 o

Zn (Zinc) 

54.0 

3.2

RV

55.2 

53.9 

51.9 

49.3 

42.1

52.5 

50.7 

50.6 

54.0

53.4 

57.7

57.0 

56.4 

55.0

57.1

54.0 

52.6 

51.2 

53.0 

55.2

55.0 

60.0 

57.6

53.8 

53.0

58.7 

58.6

50.2 

52.1 

56.0 

56.2 

58.8

50.7

mg/L

Rating

4 

4 

3 

2 

0

4 

2 

2 

4

4 

2

3 

3 

4

3

4 

4 

3 

4 

4

4 

1 

2

4 

4

2 

2

2 

3 

3 

3

1

2

49
Table 13. Laboratory performance ratings for standard reference sample Hg-25 (mercury)

(MPV, most probable value; ug/L, micrograms per liter; Lab, laboratory number; 

V/1, number of reported values of 1 value; RV, reported value; <, less than.)

Rating 

4 (Excellent) 

3 (Good) 

2 (Satisfactory)

Absolute Z-value 

0.00 - 0.50 

0.51 -1.00 

1.01 -1.50

Rating 

1 (Marginal) 

0 (Unsatisfactory) 

NR (Not Rated)

Absolute Z-value 

1.51-2.00 

greater than 2.00

Analyte = Hg (Mercury)

MPV = x: : : : : : : :2.4tx: xxx"jig/L x : x 

F-pseudosigma = 0.24

Lab

1 

3 

8 

10 

11

12 

13 

15 

16 

18

26 

32 

34.1 

34.2 

39

46 

48 

51 

59 

68

69 

70 

76 

86 

87

89 

96 

97 

100 

105

107 

119 

127 

134 

136

138 

141 

142 

145 

146

147 

149 

151 

193 

204

212 

213 

215 

217 

220

221 

234 

235 

247 

255

283 

284 

292 

297 

298

304

V/1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1 

1

1

RV

2.50 

2.30 

2,00

x: x x:2:70' x x: 2.46

3.50

2.44

: X:Xv2:35-X: X 

2,98

2.4&

xxv,t.83xxx: 

2.06

xx-X2.67:>x-: 

,.-... 3:20-x-.--

3.00

 x: : :x:2;loxx: 

1.98 

2,00 

2.06

2.41 

3.18

.....1.:77y,y

2,30

2.28

'v^3.26v'y.: .

2.50

2.60

2,44 

2.55

Xvx2,24x:x

2.39 

2.06 

2.32

2:31 

2:40

2,14 

2.60

2-30 

2.70

2.6O

:::;2,3o; v

2.32 

2.40

 . xx2,4l:x: 

2.00 

2.62 

2.33

40:10 x-:-x-3.io-x-x1,63 

2:40

2-50

2.5O

Rating

V.V.-.V.Y.4.-.V.- :':'.' .'.'.V1V.V. 

;xxx-xx2 xx-

: : -x-x4-x

o

x:XvXv.4X: x

".:..:::: A:::

x:x: x :x4xx

0

4

x: xxxx:0xxx 

' ' '- 2,,-.

xxx-x-x0vx0

: XyXyX-2.yX:

-.-x:x-x2xxx

4

 . . . . . . . .Q-.-.-.-.-.-

X; XXvX4yX;X3

X-X-X-X-3-XX'

,,,.;.;.;.;.;.l;.;.;.;, 

.-.-..-:.. - . -.--

........4...... x-x-x-:x2 x-x'-

v ' v ' v '"'4''"y 

x x x x : x:4x - x'x

 : : : " 3 - 

X; XyXy2;X;XX

XX-X 3,,,, 

. -.-.-.-.-. -. .-.-.-. .

1 x-x-x-x 3-x-:x

p b 't-Xco rr

4

50
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)

Definition of analytical methods, abbreviations, and symbols ____

Analytical methods

0. Other/Not reported

1. AA: direct, air

2. AA: direct, N2O

3. AA: graphite furnace

4. ICP

5. DCP

6. ICP/MS

7. 1C

10. AA: extraction

11. AA: hydride

12. AA: flame emission 

22. Color

atomic absorption: direct, air

atomic absorption: direct, nitrous oxide

atomic absorption: graphite furnace

inductively coupled plasma

direct current plasma

inductively coupled plasma / mass spectrometry

ion chromatography

atomic absorption: extraction (chelating agent[s] specified)

atomic absorption: hydride (reducing agent specified)

atomic absorption: flame emission

colorimetric (color reagent specified)

Abbreviations and symbols

Constituent

Ag Silver

Al Aluminum

As Arsenic

B Boron

Ba Barium

Be Beryllium

Ca Calcium

Cd Cadmium

Co Cobalt

Cr Chromium

Cu Copper

Fe Iron

K Potassium

Li Lithium

N = number of analyses-(excluding less than values)

MPV = most probable value

F-pseudosigma = nonparametric statistic deviation

Hu = upper hinge value

HI = lower hinge value

jig/L = micrograms per liter

mg/L = milligrams per liter

Lab = laboratory code number

NR = not rated, less than value reported or insufficient data

< = less than

page Constituent

52 Mg Magnesium

53 Mn Manganese

54 Mo Molybdenum

55 Na Sodium

56 Ni Nickel

57 Pb Lead

58 Sb Antimony

59 Se Selenium

60 SiO2 Silica

61 Sr Strontium

62 Tl Thallium

63 U Uranium

64 V Vanadium

65 Zn Zinc

page

66

67

68

69

70

71

72

73

74

75

76

77

78

79

51
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Ag (Silver)

14.0

0. Other 

1. M: direct air

3. M: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

12. Flame emission

1 3

13.0 10.0

12.0

24

8.3

15.0

11.0

1.4

19

9.5

13.3

11.3

1.0

20

9.5

11.9

11.0

0.4

1

6.0

Lab Rating Z-value

12

MPV = 

F-pseudosigma =

Hl =

11.1

I.0 

68

II.7 

10.4

12

1

3 

5 

8

11

12 

13 

16 

18 

23

25 

26 

30.1 

32 

34

39 

40 

42 

46 

48

59 

68 

69 

70 

85

87 

89 

96 

97 

100

102 

105 

107 

119 

121

126 

127 

134 

138 

140

141 

142 

146 

147 

151

180 

190 

193 

212 

213

3 

1 

0 

3 

4

0 

2

1 

4 

3

0 

4 

4 

4 

4

2 

3 

3 

2 

3

4 

3 

0 

3 

3

3 

3 

1 

0 

4

0 

3 

1 

2 

4

2 

3 

4 

4 

2

2

4 

0 

4 

4

4 

4 

3 

4 

1

0.52 

1.97 

-2.18 

0.93 

-0.31

4.05 

1.35 

-1.66 

-0.10 

0.83

-5.10 

-0.21 

-0.10 

0.31 

0.31

-1.14 

0.52 

-0.52 

-1.25 

-0.52

-0.43 

-0.73 

-2.77 

0.62 

0.93

-0.83 

0.52 

1.66 

-2.93 

0.31

-10.10 

0.73 

1.87 

-1.35 

0.21

-1.14 

0.52 

-0.44 

0.00 

-1.14

1.25 

-0.33 

2.28 

-0.10 

0.00

0.10 

0.21 

-0.93 

-0.10 

-1.73

9.0

15.0 

11.9

10.9 

11.4

9.9

8.4 

11.7 

12.0

10.3 

11.6 

12.7 

8.3

12.9 

9.8

10.0 

11.6 

10.7

10.0

12.3

11.3 

10.2

9.4

11.6 

13.0

12.0 

10.8

12.4 

9.5 

11.0

<6

11.0 

11.4

10.0 

11.6 

10.6

10.6

10.7 

10.4

11.4

<1 

11.8

11.3

11.1

10.8 

13.3 

11.0 

11.1

11.2 

11.0

Lab Rating Z-value 12

215 

217 

221 

234 

235

236 

241 

246 

247 

255

256 

257 

259 

265 

268

273 

283 

284 

292 

304

1 

4 

4 

4 

4

2

3 

0 

3 

4

1 

0 

3 

4 

2

4 

2

1 

1 

4

1.97 

-0.21 

-0.31 

-0.31 

0.00

-1.14 

-0.73 

2.18 

0.83 

0.21

-1.64 

-5.29 

0.52 

0.10 

-1.14

0.10 

-1.14 

1.97 13.0 

1.97 

0.42

13.0 

10.9 

10.8 

10.8 

11.1

10.0 

10.4 

13.2 

11.9 

11.3

9.5 

6.0 

11.6 

11.2 

10.0

11.2 

10.0

13.0 

11.5

52
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Al (Aluminum)

25.00 '-_- 

20.00 -_- 

15.00 -_- * 

10.00 :-

c nn " ^ ^^ ~ 

0.00 J 

0. Other 

2. AA: direct nitrous oxide 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab Rating Z-value

1 NR 

3 NR 

5 NR 

8 NR 

13 NR

16 NR 

18 NR 

23 NR 

25 NR 

26 NR

30.1 NR 

32 NR 

33 NR 

39 NR 

42 NR

48 NR 

59 NR 

68 NR 

69 NR 

70 NR

85 NR 

89 NR 

97 NR 

100 NR 

102 NR

105 NR 

107 NR 

119 NR 

127 NR 

134 NR

136 NR 

138 NR 

141 NR 

142 NR 

145 NR

146 NR 

147 NR 

151 NR 

180 NR 

190 NR

191 NR 

204 NR 

212 NR 

215 NR 

217 NR

218 NR 

221 NR 

234 NR 

235 NR 

236 NR

/ ty

 - * ^o-fr-*

<r^ ~^~

___ ^2 _^ 3 -0-4 -^. -*-.

4. ICP 

5. DCP MP\ 

6. ICP/MS 

2 0 10 15 1 15 h 

15.00 <50 4.19 3.63 65.00 5.00 

16.88 18.10 749.00 16.00 

7.69 20.50 6.66 

2.64 51.73 0.63

023456 Lab Rating Z-value 0

6.30 237 NR 

< 30 241 NR 

< 30 246 NR 

< 50 247 NR 

6.30 254 NR

13.40 255 NR 

< 100 256 NR 16.88 

< 50 257 NR 

< 19 265 NR 

4.19 268 NR

<10 273 NR 

7.00 283 NR 

65.00 284 NR 15.00 

88.00 287 NR 

< 10 292 NR

16.00 304 NR 

6.70 

20.50 

<50 

< 100

< 100 

18.10 

9.75 

17.00 

5.00

<10 

13.50 

5.60 

<30 

3.63

749.00 

7.44 

< 100 

<50 

67.00

<200 

6.50 

6.00 

45.50 

6.19

5.00 

6.66 

< 100 

<50 

< 100

170.00 

7.67 

8.64 

6.90 

23.00

^ » » » » »^»/

/ = insufficient data 

J= 43

23456

142.00 

8.70 

<35 

7.60 

<20

<34

5.04 

6.20 

5.00

6.60 

8.00

7.70 

< 100

6.80

53
Table 14. Statistical summary of reported data for standard reference sample T-1 51 (trace constituents)-Continued

As (Arsenic)

0. Other 

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS 

11na.AA: hydride NaBH4

1 8

1.00 0.43

1.37

0.94

0.44

4

1.95

44.40

13

0.50

1.42

1.02

0.28

4

0.60

1.60

MPV=

F-pseudosigma =

N=

Hu =

Hl=

1.01

0.39

30

1.30

0.77

Lab Rating Z-value 6 11na

1

3 

5 

8 

10

13 

16 

18 

23 

25

26 

30.1 

32 

39 

42

46 

48 

59 

68 

69

70 

87 

89 

96 

100

102 

105 

107 

119 

127

134 

136 

138 

141 

142

145 

146 

147 

151 

154

180 

190 

191 

193 

204

212 

215 

217 

220 

221

2 

NR 

3 

3 

NR

NR 

3 

NR 

NR 

NR

3 

3 

NR 

2

4

3 

2 

3 

0 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

2 

0 

NR 

NR

4

0 

NR 

4 

3 

3

NR 

3 

4 

NR 

2

NR 

NR 

NR 

NR

4

1,50

0.92 

-0.79

0.74

-0.74 

0.74

-1.04 

0.43

0.74 

-1.30 

-0.53 

2.39

-1.48 

110.44

0.03

33.06

-0.41 

-0.61 

0.66

-0.73 

0.15

1.04

-0.03

1.60 

<10 

1.37 

0.70 

<2

<5 

1.30 

<1 

<10 

<50

0.72 

1.30 

<0.3 

0.60 

1.18

1.30 

0.50 

0.80 

1.95 

<5

<2 

<2

<2

<4 

<5 

<2 

<2

0.43 

44.40 

<2 

<50 

1.02

14.00

0.85 

0.77 

1.27

<40.1 

0.73 

1.07 

<5 

1.42

<5 

<5 

<2

1.00

Lab Rating Z-value 11na

234 

235 

236 

241 

246

247 

254 

255 

256 

257

265 

268 

283 

284 

292

4 

4 

NR 

NR 

NR

NR 

NR 

NR 

0 

3

4 

NR 

NR 

4 

NR

-0.36 

0.23

3.67 

-0.89

-0.03 

-0.03

0.87

<35 

<5 

<65

<110 

<2 

2.45 

0.66

1.00 

<3

1.10

<2

1.00 

< 10 

<5

304 -0.59 0.78

54
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

B (Boron) |ug/L

4. ICP

6. ICP/MS

Lab

1

3

4

5

8

11

16

18

24

25

26

30.1

32

39

40

42

48

48

68

70

85

86

100

119

127

134

136

138

141

142

145

147

154

158

180

212

215

217

220

234

236

237

246

247

254

255

256

259

265

268

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Rating Z-value

4 0.03

2 1.03

3 -0.93

4 0.38

1 -1.80

4 -0.17

0 24.96

NR

4 0.38

0 -2.89

4 -0.30

4 -0.06

4 0.38

2 1.03

0 -2.10

3 0.64

2 -1.45

3 0.59

0 4.44

NR

3 0.81

4 -0.32

0 18.22

NR

3 -0.71

4 0.00

0 3.86

3 0.54

0 2.25

NR

4 -0.49

4 -0.49

4 -0.02

2 -1.36

0 3.34

NR

2 -1.36

NR

4 -0.06

4 0.03

3 -0.71

1 1.68

4 0.09

4 0.29

2 -1.36

4 0.44

1 -1.98

4 -0.06

4 -0.12

3 0.81

38

20.0

151.0

36.1

5.9

4

36.4

41.0

32.0

38.0

28.0

35.5

151.0

<50

38.0

<23

34.9

41.0

26.6

29.6

56.7

<100

40.0

34.8

120.0

<50

33.0

36.3

54.0

38.8

46.6

<50

34.0

34.0

36.2

30.0

51.6

<100

30.0

<100

36.0

36.4

33.0

44.0

36.7

30.0

38.3

27.2

36.0

7

35.7

40.0

38.0

1.7

6

36.0

38.0

39.2

39.0

37.6

35.7

40.0

MPV =

F-pseudosigma =

N =

Hu =

Hl =

36.3

4.6

45

39.2

33.0

Lab Rating Z-value

273

283

-1.34

-3.54

30.1

20.0

55
Table 14. Statistical summary of reported data for standard reference sample T-1 51 (trace constituents)--Continued

Ba (Barium)

0. Other 

1. AA: direct air

2. AA: direct nitrous oxide

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

3. AA: graphite furnace 

4. ICP

6. ICP/MS

2 1 0

34.0 55.0 < 100

45.4

5

36.8

62.0

46

35.1

384.0

40.7

2.0

19

37.7

46.0

40.7

1.0

Lab Rating Z-value

MPV = F-pseudosigma = N = HIP40.7

1.7

73

41.9

39.6

1

3 

4 

5 

8

11 

13 

16 

18 

19

23 

24 

25 

26 

30.1

32 

33 

39 

40 

42

46 

48 

59 

68 

70

76 

83 

85 

86 

87

89 

96 

97 

100 

102

105 

107 

119 

121 

127

134 

136 

138 

140 

141

142 

145 

146 

147 

149

4 

4 

0 

3 

1

0 

4 

4 

3 

4

NR

3

4 

4 

4

4 

0 

4 

3

4

3 

1 

2 

3 

NR

3 

3 

0 

3 

0

NR 

NR

0 

2 

3

4 

0 

4 

4 

3

4 

0 

3 

0 

0

4 

3 

4 

4 

4

0.05 

0.17 

-3.29 

0.64 

-1.59

201.35 

0.29 

0.40 

-1.00 

-0.42

0.93 

-0.01 

0.29 

-0.42

0.17 

2.75 45.4 

0.17 

-0.89 

0.35

-0.59 

-1.59 

1.23 

-1.00

0.90 

-0.65 

-2.76 

0.70 

-2.29

4.74 

1.23 

-1.00

0.17 

5.04 

-0.42 

-0.42 

-0.83

0.36 

5.21 

0.65 

8.38 

-2.35

0.00 

0.76 

-0.01 

-0.42 

-0.42

41.0 

35.1 

41.8 

38.0

384.0 

41.2

39.0 

40.0

<100 

42.3 

40.7 

41.2

41.0 

39.2

39.7

39.0 

<50

39.6 

36.0 

41.9 

36.8

<50 

<100 

48.8 

42.8 

39.0

49.3 

40.0 

40.0 

39.3

41.3 

49.6 

41.8 

55.0 

36.7

42.0 

40.7

40.0

40.8

41.4

40.0

41.0 

41.3

38.0 

42.8

42.2

41.0

40.7 

40.0

Lab Rating Z-value

151 

154 

158 

180 

191

204 

212 

215 

217 

220

234 

235 

236 

237 

241

246 

247 

255 

256 

259

265 

268 

273 

283 

284

292

304

4 

0 

2 

3 

4

1 

4 

4 

4 

4

4 

3 

1 

0 

0

3 

1 

3 

3 

4

4 

0 

2 

4 

0

4 

3

-0.42 

-3.06 

1.34 

0.64 

-0.01

-1.77 

-0.42 

-0.42 

0.40 

0.17

0.05 

-1.00 

-1.59 

3.69 

12.49

0.99 

1.58 

0.87 

-0.96 

-0.36

-0.42 

3.10 

-1.06 

-0.42 

-3.94 34.0

0.17 

-0.53

35.5 

43.0 

41.8

40.0 

41.4 

41.0

40.8 

39.0 

38.0 

47.0 

62.0

42.4

42.2 

39.1 

40.1

38.9 

40.0

41.0

40.0 

40.7

37.7 

40.0

43.4

40.0 

46.0

39.8

56
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Be (Beryllium) |ug/L

0. Other 

2. AA: direct nitrous oxide

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 1 9

36.0 23.0 6.2

25.8

23.9

0.0

38

18.3

32.0

25.7

1.3

15

21.0

29.4

26.0

2.3

Lab Rating Z-value

MPV = 

F-pseudosigma =

Hl =

25.6

1.6

64

26.9

24.8

1

3 

4 

5 

8

11 

13 

16 

18 

25

26 

30.1 

32 

39 

40

42 

46 

48 

59 

68

69 

70 

83 

85 

86

89 

96 

97 

100 

102

105 

119 

127 

134 

138

141 

142 

145 

146 

147

151 

154 

158 

180 

193

212 

213 

215 

217 

220

4 

4 

0 

4 

3

4 

3 

1 

4 

2

3 

4 

1 

4 

4

2 

4 

3 

3 

4

2 

4 

4 

4 

4

0 

1 

4 

2

1

0 

3 

4 

4 

4

1 

2 

3 

4 

4

2 

2 

4 

4 

2

4 

4 

4 

4 

2

-0.03 

0.29 

-4.66 

0.29 

0.93

-0.10 

0.93 

1.83 

-0.35 

-1.19

1.00 

-0.35 

1.57 

-0.35 

-0.48

1.45 

0.42 

-1.00 

-0.67 

-0.29

-1.06 

0.10 

-0.22 

-0.35 

0.03

-2.09 

-1.64 

0.16 

1.19 

-1.64

2.22 

-0.55 

-0.35 

0.04 

0.25

-1.70 

-1.14 

0.93 

0.29 

0.29

1.25 

-1.06 

0.29 

-0.42 

-1.19

0.29 

-0.29 

-0.35 

-0.03 

1.06

26.0 

18.3 

26.0 

27.0

25.4 

27.0

25.0 

23.7

27.1

25.0 

24.8

26.2 

25.1

23.9 

25.7 

25.2 

25.0 

25.6

22.3 

23.0 

25.8 

27.4 

23.0

24.7 

25.0 

25.6 

25.9

22.9

27.0 

26.0

23.9 

26.0 

24.9 

23.7

25.1 

25.0 

25.5 

27.2

25.5

28.4

25.0 

28.0

27.8

24.0 

24.5

29.0

23.8 

26.0

27.5

26.0

Lab Rating Z-value

234

235

236

237

241

-0.48 

1.57 

0.29 

4.14 

-12.43

24.8

28.0

26.0

32.0

6.2

246

247

255

265

268

0.74

2.47

-0.16 

0.29

-2.92

26.7

25.3

26.0

29.4

21.0

283 3

284 0

292 1

304 3

0.74 

6.71 

-1.64 

1.00

36.0

26.7

23.0

27.1

57
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Ca (Calcium) mg/L

0. Other 

1. AA: direct air

2. AA: direct nitrous oxide

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4 

5

6.

2

33.3

46.1

ICP 

DCP

ICP/MS

19

35.5

44.6

37.0

1.6

3

36.6

38.8

57

33.0

64.4

38.0

1.0

1 6

40.2 33.0

40.4

MPV:

F-pseudosigma :

N:

HIT 

Hl =

37.9

1.4

88

38.5

36.6

Lab Rating Z-value

1

3 

4 

5 

8

11 

13 

16 

18 

19

23 

24 

25 

26 

30.1

30.2 

32 

33 

39

40

43 

46 

48 

51 

59

64 

68 

69 

70 

83

84 

85 

86 

87 

89

97 

100 

102 

105 

107

110 

119 

121 

127 

134

136 

138 

140 

141 

142

4 

1 

1 

3 

4

4 

4 

4 

1 

4

2

4 

1 

4 

0

3 

4 

1 

2 

3

4 

4 

1 

3 

3

4 

3 

2 

3 

3

2 

2 

4 

3

0

4 

3 

2 

3

4

4 

4 

4 

4 

4

2

4 

3 

0 

4

0.02 

1.51 

1.51 

0.66 

0.31

0.31 

0.16 

0.09 

-1.75 

-0.40

-1.33 

-0.33 

1.94 

-0.48 

-3.46

-0.62 

-0.26 

1.65 

-1.47 

-0.90

0.02 

-0.12 

1.80 

0.52 

-0.97

0.38 

0.52 

-1.11 

0.52 

-0.83

-1.33 

-1.40 

-0.33 

0.66 

4.78

-0.12 

0.52 

-1.33 

-0.62 

-0.33

0.13 

0.09 

-0.33 

0.16 

-0.16

-1.26 

0.26 

-0.62 

-3.46 

0.16

36.0

38.6 

38.5

36.3

36.0 

35.9

44.6

37.7 

37.4

38.1

37.0

37.9 

40.0 

40.0 

38.8 

38.3

38.3 

38.1 

38.0 

35.4 

37.3

37.4 

40.6 

37.2 

33.0

37.0 

37.5 

40.2 

35.8 

36.6

37.9 

37.7 

40.4

38.4 

38.6

38.6 

36.7

37.4 

38.8

38.6 

36.0 

37.0

38.0 

37.4 

38.1 

37.6

36.1 

38.2

33.0 

38.1

Lab Rating Z-value

145 

146 

147 

149 

154

158 

180 

191 

193 

196

203 

204 

209 

212 

215

217 

218 

220 

221 

234

235 

236 

237 

241 

246

247 

254 

255 

257 

265

268 

273 

283 

284 

287

292 

297 

304

4 

2 

2 

3 

2

0 

4 

3 

3 

0

2 

2 

0 

3 

1

2

0 

4 

1 

4

2 

2

4 

2 

4

4 

3 

4 

0 

4

3

4 

3 

0 

4

0 

4 

4

0.38 

-1.04 

-1.33 

-0.69 

-1.11

2.93 

0.16 

-0.90 

-0.90 

2.37

-1.47 

-1.04 

18.82 

-0.69 

-1.90

-1.19 

2.93 

-0.02 

-1.68 

0.09

1.02 

-1.19 

0.31 

1.30 

-0.30

0.31 

-0.55 

0.38 

-3.24 33.3 

0.38

0.80 

-0.33 

0.87 

5.84 46.1 

0.09

2.72 

0.09 

0.09

38.4 

36.4 

36.0 

36.9 

36.3

42.0 

38.1 

36.6 

36.6 

41.2

35.8 

36.4 

64.4 

36.9 

35.2

36.2 

42.0 

37.8 

35.5 

38.0

39.3 

36.2 

38.3 

39.7 

37.5

38.3 

37.1 

38.4

38.4

39.0 

37.4 

39.1

38.0

41.7 

38.0 

38.0

58
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)~Continued

Cd (Cadmium)

31.0 

30.0 

29.0 

28.0 

27.0 

26.0 

25.0 

24.0 

23.0 

22.0

 <x>

-f

-i-- - -jfi^^^^-S X^jxooe^x^

</^ *J* ,A/yVX*>C^ .^44444444^ «v^ ***^*^§& --f^-----

jt~ <T

). Other 

. AA: direct air 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

4 

5 

8

10 

11 

12 

13 

16

18 

19 

23 

24 

25

26 

30.1 

32 

34 

39

40 

42 

46 

48 

59

68 

69 

70 

83 

86

87 

89 

96 

97 

100

102 

105 

107 

119 

121

126 

127 

134 

136 

138

140 

141 

142 

145 

146

Rating Z-value

4 -0.13 

3 -0.64 

0 -4.69 

3 -0.51 

4 0.13

4 -0.19 

4 -0.45 

4 0.00 

3 -0.64 

3 -0.51

3 -0.51 

1 -1.80 

1 -1.80 

4 0.00 

2 -1.16

2 1.09 

4 0.13 

4 0.13 

2 1.41 

1 -1.80

3 -0.64 

3 0.84 

4 -0.39 

3 -0.51 

4 0.45

4 0.13 

0 -2.76 

4 -0.19 

4 0.06 

3 0.77

2 1.41 

0 2.57 

2 -1.03 

3 -0.51 

0 3.60

2 -1.16 

4 0.13 

4 -0.06 

4 0.19 

4 0.00

2 1.48 

2 1.35 

4 -0.27 

2 -1.41 

4 0.13

3 -0.51 

2 -1.16 

3 0.90 

2 1.41 

4 0.13

4. ICP 

6. ICP/MS 

12. Flame emission 

1 2 24 

31.0 26.0 22.5 

29.0 313.0 

26.6 

2.1

0 1 3

26.0

26.5 

26.8

24.0

29.0

26.2

22.5

29.0 

30.8 

25.2 

26.0

26.7 

27.1

29.1

26.0

-0-0-1-.-

35 22 1 

19.5 24.0 29.0 

32.4 29.7 

26.8 27.0 

1.6 0.7

4 6 12

26.6 

25.8 

19.5

27.0

26.1

25.8 

26.0

26.0 

24.0

26.8 

25.0

28.5 

27.0 

27.0

24.0

25.8 

28.1

26.0 

27.5

27.0

26.5 

26.9 

28.0

32.4

25.0 

27.0

26.8

28.9 

26.4 

24.6 

27.0

25.0 

28.2 

29.0 

27.0

MPV = 26.8 

F-pseudosigma = 1.6 

N= 85 

Hu= 28.1 

HI = 26.0

Lab Rating Z-value 0 1 3 4 6 12

147 4 0.13 27.0 

149 2 1.41 29.0 

151 3 0.77 28.0 

154 3 -0.71 25.7 

180 1 1.80 29.6

190 4 -0.13 26.6 

191 4 -0.32 26.3 

193 2 -1.16 25.0 

204 3 -0.96 25.3 

212 4 0.13 27.0

215 0 -2.44 23.0 

217 4 -0.26 26.4 

220 0 2.70 31.0 

221 4 -0.26 26.4 

234 2 1.09 28.5

235 4 -0.39 26.2 

236 3 -0.51 26.0 

237 0 2.70 31.0 

241 3 0.77 28.0 

246 4 0.00 26.8

247 1 1.86 29.7 

253 0 183.85 313.0 

254 0 2.06 30.0 

255 4 0.19 27.1 

256 3 -0.77 25.6

257 2 1.41 29.0 

259 3 0.64 27.8 

265 4 0.26 27.2 

268 2 1.41 29.0 

273 4 0.45 27.5

283 4 -0.19 26.5 

284 0 2.70 31.0 

287 0 5.91 36.0 

292 0 -2.31 23.2 

304 4 0.19 27.1

59
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Co (Cobalt)

4.50 

4.00 

3.50 

3.00 

2.50 

2.00 

1.50 

1.00 

0.50 

0.00

\-

). Other 

3. AA: graphite furnace 

\. ICP 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

5 

8 

13

16 

18 

25 

26 

30.1

32 

42 

48 

68 

70

85 

89 

100 

102 

105

119 

121 

127 

134

136

138 

141 

142 

145 

146

154 

158 

180 

191 

212

213 

215 

217 

221 

234

236 

237 

246 

247 

254

255 

256 

257 

265 

268

Rating Z-value

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

. --

__o^3 _._4 ^e

6. ICP/MS 

MPV = insufficient data

0399 N= 21 

<100 0.50 0.20 0.08 

1.00 23.20 0.46 

3.90 0.10 

2.31 0.01

0346 Lab Rating Z-value 0346

< 1 273 NR 5.08 

<5 283 NR 0.10 

<3 284 NR <100 

< 10 304 NR 0.08 

<5

0.46 

<5

<6 

0.10

<2

0.10 

0.20 

<50

<5 

0.40 

< 1 

< 1

0.08 

0.11 

<6

8.30

0.20 

4.00

2.00 

3.90 

<5.22 

0.10

<0.7 

<5

1.00 

0.50

<6 

<6

<5

23.20 

1.97 

0.51 

<0.5 

<20

60
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Cr (Chromium)

0. Other 

1. AA: direct air 

2. AA: direct nitrous oxide 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

4 

5 

8

10 

11 

13 

16 

18

19 

23 

24 

25 

26

30.1 

32 

34 

39 

42

46 

48 

59 

68 

69

70 

76 

83 

85 

86

87 

89 

96 

97 

100

102 

105 

107 

119 

127

134 

136 

138 

140 

141

142 

145 

146 

147 

149

Rating

4 

3 

0 

3 

2

3 

4 

2 

4 

3

3 

3 

3 

4 

4

2 

4 

0 

2 

4

4 

4 

3 

4 

4

2 

2 

3 

4

3

0 

3 

0 

1 

3

0 

4 

4 

3 

4

4 

4 

4 

1 

3

4 

0 

4 

4

0

Z-value

-0.13 

0.85 

-3.18 

-0.63 

-1.39

0.81 

-0.18 

1.03 

-0.49 

-0.94

0.85 

-0.76 

0.85 

0.40 

0.45

1.30 

-0.04 

-2.69 

-1.39 

-0.36

-0.36 

-0.49 

-0.67 

-0.40 

-0.45

1.12 

1.11 

-0.54 

-0.04 

-0.99

6.23 

0.85 

2.38 

1.84 

0.81

-2.73 

-0.49 

0.36 

-0.81 

-0.31

-0.50 

0.27 

-0.19 

1.75 

-0.94

0.10 

3.54 

0.40 

0.40 

3.09

3. AA: graphite furnace 

4. ICP 

6. ICP/MS 

2 1 1 20 

34.0 34.0 44.0 4.0 

45.0 37.0 

30.8 

2.1

0123

31.9

28.4

31.1

24.1

29.3 

29.1

44.0 

32.0 

35.4 

34.2

30.9 

28.3 

29.4

34.0

37.0

38 20 

23.0 27.0 

46.0 33.0 

30.0 29.9 

2.5 1.8

4 6

29.8 

32.0 

23.0 

28.7 

27.0

29.7 

32.4 

29.0 

28.0

32.0

32.0 

31.0

33.0 

30.0

27.0 

29.3

29.0 

28.6 

29.2

32.6 

32.6 

28.9 

30.0 

27.9

31.9

24.0 

29.0

29.0 

30.7 

29.7

28.0

30.3 

38.0 

31.0 

31.0

Lab

151 

154 

180 

190 

191

193 

204 

212 

213 

215

217 

220 

221 

234 

235

236 

237 

241 

246 

247

254 

255 

257 

259 

265

268 

273 

283 

284 

287

292 

304

Rating

4 

1 

3 

0 

2

4 

3 

4 

4 

3

3 

0 

3 

4 

4

3 

3 

0 

1 

3

4 

3 

0 

4 

4

3 

1 

4 

1 

3

4 

3

MPV = 

F-pseudosigma =

Hu = 

Hl =

Z-value 0 1

-0.09 

1.70 

-0.58 

2.06 

-1.21

0.04 

-0.90 

-0.49 

-0.13 

-0.94

0.85 

7.13 

0.63 

0.27 

-0.49

-0.94 

0.85 

-11.70 

1.52 

0.76

-0.04 

0.58 

6.68 45.0 

-0.09 

0.40

0.85 

-1.57 

0.31 

1.75 34.0 

0.85

-0.04 

0.85

30.1 

2.2 

82 

32.0 

29.0

2346

29.9 

33.9 

28.8 

34.7 

27.4

30.2 

28.1 

29.0 

29.8 

28.0

32.0 

46.0 

31.5 

30.7 

29.0

28.0 

32.0 

4.0 

33.5 

31.8

30.0 

31.4

29.9 

31.0

32.0 

26.6 

30.8

32.0

30.0 

32.0

61
Table 14. Statistical summary of reported data for standard reference sample T-1 51 (trace constituents)-Continued

Cu (Copper)

0. Other 

1. AA: direct air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

12. Flame emission

1 7

44.0 33.0

41.0

38.0

3.0

18

29.0

36.9

34.0

2.7

39

21.0

45.3

33.2

2.8

21

28.5

37.0

32.7

2.0

1

29.0

Lab Rating Z-value

-12

F-pseudosigma = 

Hu =

33.0

2.5

87

34.9

31.6

12

1

3 

4 

5 

8

10 

11 

12 

13 

16

18 

19 

23 

24 

25

26 

30.1 

32 

39 

40

42 

46 

48 

59 

68

69 

70 

76 

83 

85

86 

87 

89 

96 

97

100 

102 

105 

107 

119

121 

126 

127 

134 

136

138 

140 

141 

142 

145

4 

4 

0 

4 

3

3 

4 

3 

2 

4

3 

0 

3 

3 

4

4 

4 

4 

2 

4

2

4 

1 

4 

1

NR 

3 

2 

4 

1

4 

4 

3 

4 

3

3 

0 

3 

2

4

3

1 

4 

4 

0

4 

4 

1 

4 

0

-0.23 

-0.11 

-4.54 

0.41 

-0.91

0.70 

0.41 

-0.51 

1.42 

0.17

-0.51 

-2.12 

-0.83 

0.98 

-0.11

-0.03 

0.29 

-0.11 

1.50 

-0.43

-1.34 

0.41 

-1.72 

0.37 

2.03

0.98 

1.45 

0.17 

1.90

0.09 

0.29 

-0.83 

0.37 

0.78

-0.55 

-2.12 

-0.91 

1.10 

-0.11

-0.83 

1.90 

-0.39 

0.24 

4.84

0.13 

-0.11 

-1.52 

0.00 

4.32

35.0 

32.0

31.2

34.3

<50 

38.0

34.0 

31.2 

34.2 

35.2

36.0

38.0 

32.3 

33.9

33.0

33.0 

22.0 

34.3 

31.0

34.3 

36.8

32.0 

28.0

35.7 

33.0

33.2

37.0 

32.2

38.3

35.7 

33.7

33.5

31.9 

28.0

33.0

45.3

29.5 

44.0

32.7

33.7

34.0 

33.0

30.0

29.0 

34.2

36.9

31.0

31.2

33.6 

33.3

Lab Rating Z-value 12

146 

147 

149 

151 

154

158 

180 

190 

191 

193

203 

204 

212 

213 

215

217 

220 

221 

234 

235

236 

237 

241 

246 

247

253 

254 

255 

256 

257

259 

265 

268 

273 

283

284 

287 

292 

304

2 

3 

4 

4 

2

2

4 

4 

1 

NR

1 

3 

3 

3 

1

4 

0 

3 

4 

4

4 

0 

1 

4 

3

2

4 

4 

2 

1

4 

3 

2 

0 

0

0 

0

1

4

1.26 

-0.51 

0.29 

-0.11 

-1.12

1.50 

0.13 

0.37 

-1.92

1.90 

-0.91 

-0.91 

0.62 

-1.72

-0.31 

3.96 

0.58 

-0.43 

-0.19

-0.11 

4.72 

-1.52 

0.41 

0.62

1.47 

0.29 

0.33 

-1.32 

-1.72

-0.11 

-0.51 

1.50 

-4.94 

-2.61

4.32 

3.11 

-1.72 

-0.35

36.4 

32.0 

34.0 

33.0 

30.5

37.0 

33.6 

34.2 

28.5 

<50

38.0 

31.0 

31.0 

34.8 

29.0

32.5 

43.1 

34.7 

32.2 

32.8

33.0 

45.0 

29.5 

34.3 

34.8

36.9 

34.0 

34.1 

30.0 

29.0

33.0 

32.0 

37.0 

21.0 

26.8

44.0 

41.0 

29.0 

32.4

62
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Fe (Iron)

0. Other 

1. AA: direct air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

22fe: Color, ferricyanide

1 5

0.0 8.0

20.0

4

8.2

137.0

27

4.4

80.0

9.7

3.4

5

5.2

175.0

1

14.0

Lab Rating Z-value 22fe

1

3 

5 

8 

10

13 

16 

18 

21 

23

25 

26 

30.1 

30.2 

33

40 

43 

48 

68 

69

70 

83 

85 

87 

89

91 

96 

97 

100 

102

105 

107 

119 

121 

126

127 

134 

136 

138 

140

141 

142 

145 

146 

147

151 

154 

158 

180 

190

3 

0 

4 

NR 

NR

NR 

4 

NR 

3 

NR

NR 

3 

0 

NR 

0

3 

NR 

3 

4 

NR

NR 

1 

NR 

NR 

NR

NR 

NR 

4 

NR 

4

NR 

0 

4 

3 

NR

4 

4 

0 

3 

4

NR 

NR 

3 

NR 

NR

2 

2 

2 

NR

1

-0.56 

15.74 

-0.06

-0.27 

0.90

-0.75 

37.10

-2.25

-0.83

0.67 

0.36

1.89

-0.40 

-0.45

2.25 

0.00 

0.90

0.22 

-0.45 

3.24 

-0.68 

-0.45

-0.90

-1.08 

-1.01 

-1.17

1.62

7.5 

80.0 

9.7 

<20 

<20

<10 

8.8 

<50 

14.0 

<500

<6 

6.7 

175.0 

<500 

0.0

6.3 

<10 

13.0 

11.6 

<50

<20 

18.4 

<10 

<40 

<50

<20 

<50 

8.2 

<10 

8.0

<20 

20.0 

10.0 

14.0 

<50

11.0 

8.0 

24.4 

7.0 

8.0

<50 

<2 

6.0 

<50 

<40

5.2 

5.5 

4.8 

<3.33 

17.2

22fe

MPV = F-pseudosigma :

HIT 

Hh

10.0

4.4

43

14.0

8.0

Lab Rating Z-value 22fe

191 

203 

204 

212 

213

215 

217 

218 

220 

221

234 

236 

237 

241 

246

247 

254 

255 

256 

257

265 

268 

273 

283 

284

287 

292 

297

NR 

NR 

0 

NR 

0

4 

NR 

0 

4 

3

4 

4 

NR 

4 

NR

4 

NR 

NR 

2 

0

3 

4 

4 

NR 

NR

4 

NR 

0

-2.27 

28.55

0.00

8.99 

0.22 

0.63

-0.32 

-0.45

0.45

0.45

-1.27 

6.72

0.67 

-0.22 

0.00

0.00 

5.62

<10 

<0.02 

<100 

137.0

10.0 

<100 

50.0 

11.0 

12.8

8.6 

8.0 

<50 

12.0 

<15

12.0 

<8 

< 14.2 

4.4 

39.9

10.0 

<20 

<50

10.0 

< 10 

35.0

<50

13.0 

9.0

63
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

K (Potassium) mg/L

2.30 - 

2.20 

2.10 - 

2.00 -

1.90 

1.80 

1.70 - 

1.60

0 

1 

4

 -f

fit!

Other 

AA: direct air 

ICP 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

4 

5 

8

11 

13 

16 

18 

19

23 

24 

25 

26 

32

33 

40 

43 

46 

48

51 

59 

64 

68 

69

70 

83 

85 

86 

87

89 

97 

100 

102 

105

107 

110 

119 

127 

134

138 

140 

141 

142 

145

146 

149 

154 

158 

180

Rating Z-value

3 -0.60 

4 0.36 

1 2.02 

0 -4.17 

4 0.44

0 -2.34 

4 0.28 

1 2.02 

4 0.20 

2 -1.47

3 0.99 

1 -1.86 

NR 

4 -0.12 

4 0.44

4 0.44 

3 -0.83 

4 0.44 

4 0.44 

0 2.26

4 -0.04 

1 2.02 

3 0.83 

3 0.60 

2 1.15

3 0.52 

4 -0.36 

3 -0.83 

4 0.04 

0 -2.82

3 -0.99 

3 -0.52 

2 -1.31 

4 -0.36 

1 -1.79

0 4.80 

3 -0.99 

4 0.44 

2 1.39 

4 -0.28

3 -0.75 

4 -0.04 

1 -1.71 

2 -1.31 

4 -0.20

2 1.07 

4 -0.36 

0 4.40 

4 0.44 

0 -3.06

- ^

j i 1 CJ ' '

^--

P

0»~»~ f

6. ICP/MS 

7. Ion chromatography 

12. Flame emission 

2 26 38 5 1 4 

1.06 1.59 1.42 1.90 1.93 1.48 

2.00 7.43 3.80 2.23 2.09 

1.90 1.98 

0.19 0.16

0 1

1.87

2.20

2.07

2.00

2.20 

2.05

1.90 

1.84

1.59

1.82 

1.88

2.55 

1.82

2.12 

1.91

1.94

1.90

4 6 7 12

1.99 

2.20 

1.42 

2.00

1.65 

1.98

1.97 

1.76

1.71 

1.12 

1.93 

2.00

1.84 

2.00 

2.00 

2.23

1.94

2.02 

2.09

2.01 

1.95

1.78 

1.90 

1.72

2.00

1.85

1.73 

1.78 

1.92

2.08

2.50 

2.00 

1.56

>>

^o**** ^^^iO^OOOOOO^ ^X

MPV = 

F-pseudosigma =

Hu = 

Hl =

Lab Rating Z-value 0 1

191 4 0.28 

193 3 -0.52 1.88 

196 3 -0.61 1.87 

203 2 1.47 2.13 

204 4 0.12

209 0 43.53 7.43 

212 NR 

215 0 -7.31 

217 NR 

218 0 2.82

220 0 14.72 

221 4 -0.04 1.94 

234 4 0.04 

236 4 -0.12 

241 1 -1.94 1.70

246 2 1.15 

247 0 2.42 

254 2 -1.15 1.80 

255 4 0.44 

256 0 -3.69

259 3 -0.52 1.88 

265 3 -0.52 

268 4 0.44 

273 4 0.44 

283 1 -1.71

284 0 -7.05 1.06 

287 0 8.37 3.00 

292 4 -0.36 1.90 

297 4 0.28 

304 4 -0.36

f? t-

--- J ** A ^I

|

J

1.95 

0.13 

76 

2.02 

1.85

4 6 7 12

1.98 

1.96

<5 

< 1 

<5 

2.30

3.80

1.95 

1.93

2.09 

2.25

2.00 

1.48

1.88 

2.00 

2.00 

1.73

1.98 

1.90

64
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Li (Lithium)

3. AA: graphite furnace 

4. ICP

6. ICP/MS

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

12. Flame emission

0 24

< 50 10.0

31.9

27.6

2.2

7

25.0

30.9

28.0

1.5

2

26.8

29.0

MPV =

F-pseudosigma =

N =

Hu =

Hl =

27.6

2.1

33

28.8

26.0

Lab Rating Z-value 12

1

3 

4 

5 

8

11 

24 

25 

26 

30.1

32 

39 

40 

68 

69

100 

105 

127 

134 

142

145 

147 

151 

217 

234

236 

237 

246 

247 

254

256 

257 

259 

265 

268

273 

283

3 

0 

0 

3 

0

4 

0 

2 

4 

2

4 

2 

4 

4 

NR

4 

NR 

1 

2

4

1 

4 

4 

NR 

4

1 

3 

4 

1 

2

4 

3 

4 

3 

3

4 

3

0.58 

-8.48 

-5.54 

-0.58 

-3.62

-0.14 

2.07 

1.16 

-0.05 

-1.25

0.19 

-1.01 

0.00 

-0.24

0.19

-2.02

-1.11 

0.48

1.64 

-0.29 

0.24

-0.48

-1.73 

0.67 

0.19 

1.59 

1.16

-0.39 

0.67 

0.34 

-0.77 

0.67

0.34 

-0.77

28.8 

10.0 

16.1 

26.4 

<20

27.3 

31.9 

30.0 

27.5 

25.0

28.0 

25.5 

27.6 

27.1 

<50

28.0 

<50 

23.4 

25.3 

28.6

31.0 

27.0 

28.1 

<50 

26.6

24.0 

29.0 

28.0 

30.9 

30.0

26.8 

29.0 

28.3 

26.0 

29.0

28.3 

26.0

65
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Mg (Magnesium) mg/L

20.0

0. Other 

1 . AA: direct air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. 

5.

6.

2

17.6

21.4

ICP 

DCP

ICP/MS

22

16.0

19.3

17.3

0.4

1 56 1

17.2 10.8 17.8

47.2

17.6

0.6

6

17.2

19.1

Lab Rating Z-value

1

3 

4 

5 

8

11 

13 

16 

18 

19

23 

24 

25 

26 

30.1

30.2 

32 

33 

39 

40

43 

46 

48

51 

59

64 

68 

69 

70 

76

83 

84 

85 

86 

87

89 

97 

100 

102 

105

107 

110 

119 

121 

127

134 

136 

138 

140 

141

4 

0 

0 

4 

4

4 

4 

3 

0 

4

3 

3 

1 

3 

3

3 

1 

3 

4 

0

4 

4 

0 

4 

4

3 

2 

3 

3 

4

4 

2 

3 

2 

2

3 

4 

1 

0 

3

2 

3 

4 

4 

4

4 

1 

4 

2 

0

0.00 

1.37 

1.60 

0.23 

0.23

0.00 

-0.11 

0.57 

-1.71 

-0.23

-0.57 

0.46 

1.26 

0.46 

0.57

0.57 

1.26 

0.34 

0.00 

-1.49

-0.11 

-0.11 

1.83 

0.11 

-0.23

-0.57 

0.80 

-0.34 

0.46 

0.00

-0.23 

-0.69 

-0.34 

0.91 

-0.69

0.46 

-0.11 

1.14 

1.71 

-0.57

-0.69 

-0.39 

-0.23 

0.11 

0.00

0.17 

-1.26 

0.09 

-0.69 

-7.66

17.0

18.0

17.6 

17.3

17.2 

17.5

16.9 

17.2

16.9

17.9 

17.4

16.9 

17.2

16.9

17.5 

18.7 

18.9 

17.7 

17.7

17.5 

17.4 

18.0 

16.0 

17.3

17.9 

18.6 

17.9 

18.0

18.6 

17.8 

17.5 

16.2

17.4 

17.4 

19.1

17.0 

18.2

17.9

17.3 

18.3

18.5 

19.0 

17.0

17.3 

17.6 

17.5

17.7 

16.4 

17.6

10.8

MPV =

F-pseudosigma =

Rating Criterion =

N =

Hu =

Hl =

17.5

0.6

0.9 **

88 

18.0 

17.2

Lab Rating Z-value 0 1

142 

145 

146 

147 

149

154 

158 

180 

191 

193

196 

203 

204 

209 

212

215 

217 

218 

220 

221

234 

236 

237 

241 

246

247 

254 

255 

257 

265

268 

273 

283 

284 

287

292 

297 

304

0 

2 

3 

3 

3

1 

3 

4 

4

1

4 

4 

3 

0 

4

0 

3 

0 

3 

4

3 

3 

4 

4 

3

4 

4 

4 

0 

3

0 

4 

1 

4 

0

0 

3 

3

1.37 

0.85 

-0.34 

-0.57 

-0.34

-1.03 

0.57 

0.11 

0.25 

-1.14

-0.07 

-0.11 

-0.34 

33.94 

0.23

-1.94 

-0.57 

4.00 

-0.63 

-0.11

-0.34 

-0.34 

0.11 

0.00 

0.63

0.23 

0.00 

0.11 

4.46 

0.34

1.37 

-0.11 

1.26 

0.11 

-1.71

2.06 

0.34 

-0.34

18.7 

18.2 

17.2 

17.0 

17.2

16.6 

18.0 

17.6 

17.7 

16.5

17.4 

17.4 

17.2 

47.2 

17.7

15.8 

17.0 

21.0 

17.0 

17.4

17.2 

17.2 

17.6 

17.5 

18.1

17.7 

17.5 

17.6 

21.4 

17.8

18.7 

17.4 

18.6 

17.6 

16.0

19.3 

17.8 

17.2

66
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Mn (Manganese)

0. Other

1. AA: direct air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab Rating Z-value

1 4 -0.18

3 4 0.00

4 0 -7.82

5 0 3.96

8 3 0.90

10 2 1.35

1 1 4 0.09

13 0 -2.52

16 4 0.00

18 4 0.00

19 3 0.90

23 0 2.25

24 3 0.54

25 0 -10.91

26 4 0.36

30.1 3 0.90

32 4 0.00

33 0 6.30

39 4 0.27

40 3 -0.63

42 3 -0.99

43 3 0.90

46 3 -0.54

48 4 -0.09

59 4 -0.04

68 3 0.72

69 0 7.19

70 NR

83 3 -0.54

86 4 0.18

87 1 -1.80

89 1 -1.62

91 3 -0.54

96 NR

97 3 0.54

100 4 0.45

102 3 -0.90

105 4 -0.18

107 0 -2.70

119 0 -2.70

127 4 -0.45

134 4 0.12

136 3 0.54

138 4 0.16

140 4 0.00

141 0 3.42

142 0 -5.45

145 3 0.90

146 4 0.36

147 4 0.00

4. ICP

5. DCP

6. ICP/MS

1 9 6 48 1

14.6 10.0 11.2 4.3 20.0

21.0 20.6 18.0

13.0 13.0

2.2 0.9

01345

13.0

4.3

17.4

14.0

14.5

13.1

10.2

13.0

14.0

15.5

13.6

<2

13.4

20.0

13.3

12.3

14.0

12.4

13.8

21

<20

12.4

13.2

11.0

11.2

12.4

<20

13.6

13.5

12.0

10.0

10.0

12.5

13.1

13.6

13.2

13.0

16.8

<7

14.0

13.4

17

11.8

14.0

13.0

0.4

6

12.8

13.0

14.0

13.0

11.9

12.9

13.0

12.8

13.0

MPV:

F-pseudosigma : N = HIT

HP

13.0

1.1

82

13.9

12.4

Lab Rating Z-value

149 

151 

154 

158 

180

190 

191 

203 

204 

212

215 

217 

218 

220 

221

234 

235 

236 

237 

241

246 

247 

254 

255 

256

257 

259 

265 

268 

273

283 

284 

287 

292 

297

1 

4 

1 

4 

3

3 

2 

3 

4 

3

1 

3 

0 

0 

1

4 

4 

4 

0 

3

3 

4 

4 

4 

2

0 

4 

3 

4 

3

2 

2 

1 

4 

0

-1.80 

-0.18 

-1.62 

0.00 

0.81

0.90 

-1.08 

0.90 

0.27 

-0.90

1.80 

-0.54 

4.50 

2.07 

1.62

0.45 

0.00 

0.00 

-3.60 

-0.90

0.63 

0.36 

0.00 

0.00 

-1.17

6.81 

-0.09 

0.63 

0.00 

-0.58

-1.26 

1.46 14.6 

1.80 

0.00 

-2.34

11.0

11.2 

13.0 

13.9

14.0 

14.0

15.0 

12.4 

18.0 

15.3 

14.8

13.5 

13.0 

13.0 

9.0 

12.0

13.7

13.0 

13.0 

11.7

20.6 

12.9

12.4

11.6

15.0 

13.0 

10.4

12.8

11.8

13.3 

12.0

13.4

13.7 

13.0

304 0.45 13.5

67
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Mo (Molybdenum) H,g/L

35.0 

34.0 

33.0 

32.0 

31.0 

30.0 

29.0 

28.0 

27.0 

26.0 

25.0 

24.0 

23.0 

22.0

1 JS

-^m* ^-^XH** _________ _^^_^_^^^<r_ _

;-

m

*>^oo*> <^>

jyO^O*' ^V***^

'-' 1

I Other 

2. M: direct nitrous oxide 

3. M: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

4 

5 

8

10 

11 

13 

16 

18

23 

24 

26

30.1 

32

39 

40 

42 

46 

48

68 

70 

87 

97 

100

105 

119 

127 

134 

136

138 

141 

142 

145 

146

147 

151 

154 

180 

215

217 

220 

221 

234 

236

237 

241 

246 

247 

255

Rating Z-value

4 -0.11 

3 0.69 

0 -6.86 

2 -1.01 

NR

NR 

4 -0.47 

NR 

3 -0.97 

4 -0.29

NR 

4 0.15 

4 -0.29 

2 1.32 

3 0.69

4 0.47 

2 1.37 

4 -0.25 

0 2.18 

4 0.24

3 -0.97 

NR 

4 0.15 

2 1.01 

3 0.96

4 0.24 

3 0.65 

4 0.47 

4 0.07 

0 5.51

4 -0.29 

0 -2.32 

4 0.34 

3 0.69 

4 -0.07

4 -0.20 

4 0.47 

1 -1.69 

3 -0.92 

3 -0.65

1 -1.51 

1 1.55 

4 -0.11 

2 -1.10 

2 -1.10

1 -1.55 

0 3.39 

4 0.33 

4 0.29 

4 -0.29

4. ICP 

6. ICP/MS 

12. Flame emission 

1 0 7 

68.0 <100 28.0 

37.0 

30.5 

1.3

023

<100

29.8 

31.7

30.9 

30.5

28.0

29.2

37.0

^-0^- 2 -^3^_4^-e^ 12

MPV= 29.6 

F-pseudosigma = 1.9 

27 17 1 N= 53 

14.2 25.0 30.0 Hu= 30.5 

41.7 32.4 Hl= 28.0 

28.8 30.0 

2.7 1.0

4 6 12 Lab Rating Z-value 0 2 3 4 6 12

29.2 257 4 0.24 30.0 

31.0 259 4 -0.34 28.7 

14.2 265 4 0.24 30.0 

27.2 268 1 -2.00 25.0 

<20 283 3 -0.65 28.0

284 0 17.33 68.0 

28.4 292 2 -1.10 27.0 

<50 304 4 0.24 30.0 

27.3 

28.8

29.8 

28.8 

32.4 

31.0

30.5 

32.5 

28.9 

34.3 

30.0

27.3 

<50

31.6

30.0

29.6 

41.7

28.8 

24.3 

30.2 

31.0 

29.3

29.0 

30.5 

25.7 

27.4

26.1 

32.9

27.0 

27.0

26.0

30.2 

30.1 

28.8

68
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Na (Sodium) mg/L

64.0

0. Other 

1. AA: direct air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5. DCP 

6. ICP/MS

12. Flame emission

1 22

55.8 47.1

60.8

54.4

2.0

50

44.0

67.0

55.5

1.8

1 6

55.4 54.5

60.1

5

53.7

62.0

Lab Rating Z-value

1 

3 

4 

5 

8

11 

13 

16 

18 

19

23 

24 

25 

26 

30.1

30.2 

32 

33 

39 

40

43 

46 

48 

51 

59

64 

68 

69 

70 

83

84 

85 

86 

87 

89

97 

100 

102 

105 

107

110 

119 

121 

127 

134

138 

140 

141 

142 

145

4 

4 

3 

3 

4

0 

4 

4 

4 

3

0 

4 

2 

4 

4

0 

2 

4 

4 

4

3 

4 

1 

4 

2

4 

4 

4 

4 

3

4 

3 

3 

4 

3

4 

2 

0 

4 

4

4 

3 

4 

4 

4

4 

4 

2 

3 

4

0.15 

0.40 

-0.76 

0.91 

0.00

-2.04 

-0.36 

0.36 

-0.11 

-0.73

-2.87 

0.18 

1.24 

0.36 

0.00

2.55 

1.02 

0.15 

-0.40 

0.44

-0.55 

0.44 

1.85 

-0.36 

-1.09

0.22 

0.00 

-0.22 

0.44 

0.55

-0.47 

-0.73 

0.87 

-0.36 

-0.73

-0.44 

1.27 

-4.00 

-0.18 

-0.11

0.25 

0.73 

0.00 

0.33 

-0.20

-0.04 

0.36 

-1.85 

0.51 

0.48

47.1

52.0

55.6

53.0

54.0 

53.0

53.8 

54.7

55.7

55.9 

54.5

56.0

55.4 

56.1 

52.9 

57.5 

55.0

49.4 

54.0 

56.0 

54.7 

53.0

55.5 

58.4 

56.0 

55.0

57.8 

55.4 

53.9 

56.2

53.5 

56.2 

60.1

55.0

56.2 

56.5

57.4

58.5 

44.0 

54.5

57.0 

55.0

54.9

49.9 

56.4 

56.3

62.0

54.0

54.4

53.7

MPV =

F-pseudosigma =

Rating Criterion =

N =

Hu =

Hl =

55.0

1.6

2.8 **

85 

56.2 

54.0

Lab Rating Z-value 0 1

146 

149 

154 

158 

180

191 

193 

196 

203 

204

209 

212 

215 

217 

218

220 

221 

234 

236 

237

241 

246 

247 

254 

255

259 

265 

268 

273 

283

284 

287 

292 

297 

304

1 

4 

3 

4 

4

4 

4 

3 

4 

4

3 

3 

2 

3 

0

4 

4 

4 

3 

4

2

4 

3 

4 

4

4 

4 

2 

4 

2

4 

3 

0 

2 

4

1.53 

0.36 

-0.87 

-0.36 

0.44

0.04 

-0.22 

0.75 

-0.22 

-0.25

-0.94 

0.76 

-1.16 

-0.51 

4.36

0.05 

0.11 

-0.04 

-0.98 

-0.04

-1.45 

0.39 

0.95 

0.36 

0.40

-0.33 

-0.44 

1.09 

0.00 

1.02

0.27 

-0.73 

2.11 

1.24 

-0.18

59.2 

56.0 

52.6 

54.0 

56.2

55.1 

54.4 

57.1 

54.4 

54.3

52.4 

57.1 

51.8 

53.6 

67.0

55.2 

55.3 

54.9 

52.3 

54.9

51.0 

56.1 

57.6 

56.0 

56.1

54.1 

53.8 

58.0 

55.0 

57.8

55.8 

53.0 

60.8 

58.4 

54.5

69
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Ni (Nickel)

14.0

11.0

8.0

5.0

"

M::::::.,

: ^

0. Other 

1. AA: direct air 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab Rating Z-value

1 4 0.00 

3 4 0.00 

5 NR 

8 NR 

11 4 0.06

13 NR 

16 0 2.63 

18 4 -0.23 

19 0 7.02 

23 NR

25 NR 

26 4 -0.12 

30.1 4 0.29 

32 2 1.17 

39 2 1.17

40 3 0.76 

42 1 1 .93 

48 4 -0.41 

59 4 0.23 

68 4 -0.29

69 NR 

70 NR 

85 NR 

87 0 4.68 

89 4 0.12

96 2 -1.11 

97 2 1.05 

100 1 1.70 

102 0 -5.29 

105 4 0.00

107 3 -0.94 

119 4 -0.15 

121 4 -0.12 

126 0 11.70 

127 4 -0.44

134 4 -0.06 

136 0 4.68 

138 3 0.74 

140 0 -2.34 

141 NR

142 4 0.08 

145 0 3.51 

146 NR 

147 4 -0.23 

151 4 0.12

154 4 -0.35 

158 3 -0.64 

180 NR 

190 4 -0.14 

191 4 -0.23

 ---_*-- _ - -

_ * A<y<

***" ^**~^ A^^fcO^

^._n-,_

4. ICP 

6. ICP/MS

1 4 14 19 21 

13.0 6.0 6.0 8.4 8.7 

41.0 12.0 22.0 14.5 

9.9 10.1 10.0 

1.0 3.7 0.7

01346

10.0 

10.0

<20 

10.1

<20 

14.5 

9.6 

22.0 

<20

<49 

9.8 

10.5 

12.0 

12.0

11.3 

13.3 

9.3 

10.4 

9.5

<50 

<50

18.0 

10.2

8.1 

11.8 

12.9

10.0

8.4 

9.7 

9.8 

30.0 

9.3

9.9 

18.0 

11.3 

6.0 

<20

10.1 

16.0 

<40 

9.6 

10.2

9.4 

8.9 

<16.3 

9.8 

9.6

1 <£

J +*

* +++*^ ***~* A t ft ^^

 3 0 4 » 6

MPV= 10.0 

F-pseudosigma = 1.7 

N= 59 

Hu= 11.8 

Hl= 9.5

Lab Rating Z-value 01346

193 0 18.14 41.0 

203 NR <50 

204 3 -0.78 8.7 

212 3 0.59 11.0 

215 3 -0.59 9.0

217 NR <40 

220 0 4.16 17.1 

221 4 -0.04 9.9 

234 4 0.23 10.4 

235 4 -0.28 9.5

236 3 -0.59 9.0 

237 0 7.02 22.0 

241 NR <10 

246 NR <15 

247 3 0.94 11.6

254 NR <15 

255 3 -0.91 8.4 

256 3 -0.73 8.8 

257 3 1.00 11.7 

259 4 0.18 10.3

265 3 -0.59 9.0 

268 NR < 20 

273 4 -0.19 9.7 

283 3 -0.70 8.8 

284 1 1.76 13.0

287 0 -2.34 6.0 

292 NR < 20 

304 4 -0.06 9.9

70
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Pb (Lead)

26.0 

24.0 - 

22.0 

20.0

18.0 

16.0 - 

14.0 - 

12.0

0 

1 

3

/ |

^X* f j

D 

^ 

_____ - ^ AAX^ *****

/^ -f******** ^ ^^pm y i****

i

1~

Other 

AA: direct air 

AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

4 

5 

8

10 

11 

12 

13 

16

18 

23 

25 

26 

30.1

32 

33 

39 

42 

46

48 

59 

68 

69 

70

83 

87 

89 

96 

97

100 

102 

105 

107 

119

121 

126 

127 

134 

136

138 

140 

141 

142 

145

146 

147 

149 

151 

154

Rating Z-value

4 0.11 

3 0.54 

0 -7.56 

4 0.19 

NR

4 -0.32 

4 -0.02 

1 -1.61 

2 1.22 

0 3.96

4 0.11 

3 -0.96 

NR 

4 0.49 

4 -0.32

4 0.11 

0 25.12 

3 0.54 

3 0.84 

3 0.96

4 -0.11 

4 0.15 

3 -0.84 

4 -0.28 

4 0.15

3 0.88 

NR 

0 -2.29 

4 -0.15 

4 -0.45

3 0.71 

0 2.25 

4 -0.11 

1 -1.99 

4 -0.49

3 -0.71 

3 0.54 

3 -0.58 

4 -0.26 

0 8.29

4 -0.03 

3 0.54 

1 -1.99 

0 4.24 

0 7.82

3 0.75 

4 -0.32 

4 0.11 

4 -0.11 

4 -0.06

 ..*,-,_

4. ICP 

6. ICP/MS

2 1 37 14 21 1 

20.0 21.0 14.4 2.1 17.5 33.0 

78.4 23.6 39.1 29.7 

19.4 21.3 19.5 

2.2 3.9 1.0

01346

20.0 

21.0 

2.1 

20.2 

<30

19.0 

19.7 

16.0 

22.6 

29.0

20.0 

17.5

20.9 

19.0

20.0 

78.4 

21.0 

21.7 

22.0

19.5 

20.1 

17.8 

19.1 

20.1

21.8 

<20 

14.4 

19.4 

18.7

21.4 

25.0 

19.5 

15.1 

18.6

18.1 

21.0 

18.4 

19.1 

39.1

19.7 

21.0 

15.1 

29.7 

38.0

21.5 

19.0 

20.0 

19.5 

19.6

_ r ________

MPV= 19.8 

F-pseudosigma = 2.3 

N= 76 

Hu= 21.4 

Hl= 18.2

Lab Rating Z-value 0 1 3 4 6 12

180 NR <31.9 

190 1 1.65 23.6 

191 3 -0.79 17.9 

193 3 0.66 21.3 

204 4 0.41 20.7

212 4 -0.32 19.0 

213 2 -1.48 16.3 

215 3 -0.75 18.0 

217 3 -0.62 18.3 

220 1 -1.65 15.9

221 2 -1.01 17.4 

234 4 -0.02 19.7 

235 3 -0.96 17.5 

236 1 1.82 24.0 

237 2 1.39 23.0

241 4 0.49 20.9 

246 0 2.81 26.3 

247 4 0.24 20.3 

253 2 -1.24 16.9 

254 NR < 100

255 1 1.61 23.5 

257 0 5.67 33.0 

259 4 0.02 19.8 

265 3 -0.84 17.8 

268 NR <100

273 0 -2.67 13.5 

283 3 0.54 21.0 

284 4 0.11 20.0 

287 3 -0.75 18.0 

292 3 -0.75 18.0

297 2 1.05 22.2 

304 4 -0.19 19.3

71
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Sb (Antimony) jig/L

32.0 

31.0 

30.0 

29.0 

28.0 

27.0 

26.0 

25.0 

24.0 

23.0 

22.0 

21.0 

20.0

(

i

'" -F I

U & Jr

:_

;-

:-

m** ^r

 

^r^

/ A^» + »»»^^ &4 <m+**^

*^ O~v +**

^

-- 

). Other 

3. AA: graphite furnace 

I. ICP 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3

5 

8 

11

13 

16 

18 

25 

26

30.1 

32 

39 

42 

46

48 

59 

68 

69 

70

76 

89 

96 

97 

100

102 

105 

119 

127 

134

138 

141 

142 

146 

147

151 

154 

180 

193 

212

215 

217 

234 

236 

241

246 

247 

255 

257 

265

Rating Z-value

3 0.95 

1 -1.90 

2 1.40 

0 -12.24 

4 -0.45

4 -0.20 

4 -0.05 

4 -0.40 

NR 

4 0.25

2 1.10 

4 -0.40 

3 0.60 

3 0.60 

3 -0.75

3 0.60 

4 0.50 

1 -1.65 

1 -1.70 

1 -1.75

4 0.24 

1 2.05 

0 -6.20 

2 1.35 

4 0.40

3 -0.90 

4 -0.05 

0 -2.35 

2 -1.35 

4 -0.36

4 0.09 

0 4.00 

0 3.26 

NR 

4 0.10

3 0.55 

4 -0.50 

NR 

4 0.00 

3 0.60

2 1.10 

3 -0.55 

4 0.00 

3 -0.90 

0 2.85

NR 

2 1.50 

0 14.64 

0 -8.59 

3 0.70

 

6. ICP/MS 

11na.AA: hydride NaBH 

12. Flame emission 

1 19 9 

20.0 14.4 23.0 

34.8 56.1 

26.4 25.9 

2.8 1.7

034

23.0 

29.6

25.9

26.4 

26.0 

27.3

25.3

23.5 

23.4 

23.3

30.9 

14.4 

29.5 

27.6

25.0

22.1 

24.1 

26.1

27.0 

34.8

<50

25.8 

<27.8 

26.8

29.0

26.8 

25.0 

32.5

<85 

56.1

-0 3 0 4 + 6 -O 11na % 12

4 MPV = 26.8 

F-pseudosigma = 2.0 

19 1 1 N= 50 

25.5 2.3 9.6 Hu = 28.0 

33.3 HI = 25.3 

27.9 

1.0

6 11na 12 Lab Rating Z-value 0 3 4 6 11na 12

28.7 283 3 -0.65 25.5 

284 0 -3.40 20.0 

292 3 0.60 28.0 

2.3 304 4 -0.05 26.7

26.7

29.0 

26.0 

28.0 

28.0

28.0 

27.8

27.3

26.7

33.3 

27.0

27.9 

28.0

25.7

29.8

9.6 

28.2

72
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)~Continued

Se (Selenium)

5.00 

4.00 

3.00 

2.00 

1.00 

0.00

t

/

' 1 ^+

M- m * // /

 /^ ^-+ +~ ^+

 »-

). Other 

3. AA: graphite furnace 

\. ICP 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

13 

16 

18 

23 

25

26 

30.1 

32 

42 

48

59 

68 

69 

70 

87

89 

96 

100 

102 

105

107 

119 

126 

127 

134

136 

138 

141 

142 

146

154 

180 

190 

191 

193

204 

212 

215 

217 

220

221 

234 

236 

241 

246

Rating Z-value

NR 

NR 

NR 

2 -1.22 

NR

NR 

3 0.79 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

3 -0.65 

4 0.00 

NR 

NR 

NR

NR 

NR 

NR

0 3.01 

NR

4 0.50 

3 -0.95 

NR 

NR 

2 -1.03

0 33.15 

NR 

4 0.29 

3 -0.62 

NR

4 -0.39 

NR 

4 0.40 

NR 

NR

4 0.47 

NR 

NR 

NR 

NR

3 -0.93 

2 -1.09 

NR 

NR 

NR

o

6. ICP/MS 

1 1 na. AA: hydride NaBH4 MPV = 1 .80 

F-pseudosigma = 1 .39 

18361 N= 19 

3.00 0.28 1.80 0.48 0.10 Hu = 2.48 

2.50 48.00 2.90 HI = 0.60 

1.63 

1.37

0 3 4 6 11na Lab Rating Z-value 0 3 4 6 11na

<1 247 NR <5 

<10 255 NR <2 

< 2 256 NR < 1 

0.10 265 3 -0.79 0.70 

<2 268 NR <15

<5 283 NR <5 

2.90 284 3 0.86 3.00 

< 1 292 4 0.14 2.00

<129

<0.5

<4 

<2

<0.4

0.89 

1.80 

<5 

< 10 

<2

<2

< 1 

<2 

6.00 

<7

2.50 

0.48

<3 

0.36

48.00

2.20 

0.94

1.26 

<53.2 

2.36 

<2 

<5

2.46 

<5 

<5 

<2

< 1

0.50 

0.28 

<90 

<5 

<80

73
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Si02 (Silica) mg/L

22mb X 22sulf

0. Other

2. AA: direct nitrous oxide 

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

22mb. Color: molybdate blue 

22sulf. Color: sulfonic acid

1 1 32

1.62 1.50 1.08

4.36

1.46

0.13

4

1.25

1.50

12

1.01

1.55

1.38

0.05

1

1.41

MPV =

F-pseudosigma =

N =

Hu =

Hl =

1.43

0.10

51

1.50

1.37

Lab Rating Z-value 22mb 22sulf

1 

3 

4 

5 

8

13 

24 

25 

26 

32

33 

40 

43 

64 

70

83 

87 

89 

97 

100

102 

105 

107 

118 

119

121 

127 

134 

138 

140

145 

147 

151 

190 

191

203 

204 

212 

215 

217

234 

236 

237 

241 

246

247 

254 

265 

268 

273

4 

0 

2 

4 

2

4 

4 

0 

3 

4

1 

0 

4 

3 

3

3 

3

4 

4 

0

0 

2 

3 

4 

3

4 

3 

4 

3 

3

3 

4 

3 

4 

2

4 

2 

4 

0 

2

4 

0 

0 

3 

2

0 

3 

3

1 

1

-0.31 

4.15 

1.25 

0.10 

-1.35

0.42 

0.42 

30.40 

0.93 

0.42

1.97 1.62 

3.32 

-0.31 

-0.73 

-0.73

-0.62 

-0.83 

-0.21 

-0.31 

3.63

-3.63 

1.45 

-0.52 

0.31 

0.73

0.10 

-0.83 

0.43 

-0.52 

-0.52

0.52 

-0.31 

0.73 

0.00 

-1.14

-0.21 

1.25 

-0.31 

-2.39 

-1.14

0.10 

-3.42 

3.53 

0.73 

1.14

-4.36 

-0.62 

0.73 

-1.87 

1.87

1.40 

1.83 

1.55 

1.44

1.47 

1.47 

4.36 

1.52

1.75 

1.40 

1.36

1.37 

1.78

1.08 

1.57

1.50

1.44 

1.35 

1.47

1.48 

1.40

1.40 

1.20 

1.32

1.44 

1.10 

1.77 

1.50 

1.54

1.37 

1.50

1.61

1.30

1.47

1.36

1.35 

1.41 

1.40

1.38 

1.46

1.38 

1.38

1.50 

1.43 

1.32

1.41 

1.55

1.01 

1.25

Lab Rating Z-value 22mb 22sulf

283

284

-0.62 

-13.30

1.37

74
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Sr (Strontium) |ig/L

0. Other 5. DCP 

3. AA: graphite furnace 6. ICP/MS

4. ICP

N= 1 1

Minimum = 474 311

Maximum =

Median =

F-pseudosigma =

41

37

460

387

13

1 6

422 362

400

Lab Rating Z-value

MPV = F-pseudosigma : N = Hu = Hh

387

16

49

397

376

1

3 

4 

5 

8

11 

16 

18 

24 

25

30.1 

32 

33 

39 

40

68 

70 

85 

86 

97

100 

102 

105 

121 

127

134 

136 

138 

142 

145

147 

151 

154 

191 

217

218 

234 

235 

236 

237

246 

247 

254 

256 

259

265 

268 

273 

283 

284

4 

2 

4 

2 

4

4 

1 

2 

1 

1

4

1 

0 

2 

0

4 

4 

4 

2 

0

4 

3 

3 

4 

2

4 

3 

4 

4 

3

3 

4 

0 

4 

0

0 

4 

4 

3 

2

3 

3

4 

4 

4

3 

3 

3 

1 

0

0.13 

1.15 

0.00 

1.46 

-0.38

-0.45 

-1.85 

-1.34 

1.59 

1.85

0.19 

-1.59 

2.19 

-1.08 

-8.40

-0.19 

0.45 

0.00 

1.34 

-4.84 311

0.00 

0.57 

0.89 

0.00 

-1.46

0.14 

-0.83 

0.29 

0.34 

0.64

-0.70 

-0.06 

-2.10 

-0.32 

-22.28

4.65 

-0.19 

-0.25 

-0.51 

1.27

0.66 

-0.70 

0.19 

0.13 

-0.45

-0.70 

0.83 

0.62 

1.65 

5.54 474

389 

405 

387 

410 

381

380 

358 

366 

412 

416

370 

255

384 

394 

387 

408

387 

396 

401 

387 

364

389 

374 

392 

392 

397

354 

37

460 

384 

383 

379 

407

397 

376 

390 

389 

380

376

397 

413

390 

362 

422

376 

386

382

400

75
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

Tl (Thallium)

0. Other

3. AA:

4. ICP

graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 16

84.0 31.0

71.0

60.7

9.3

10

17.4

151.0

58.6

7.5

19

58.5

99.0

65.0

3.7

Lab Rating Z-value

MPV =

F-pseudosigma =

N =

Hu =

Hl =

62.0

6.3

46

67.0

58.5

1

3 

8

11 

13

16 

18 

25 

30.1 

32

42 

46 

48 

59 

68

69 

70 

89 

97 

100

102 

105 

119 

127 

134

136 

138 

141 

142 

146

147 

151 

154 

180 

191

193 

212 

215 

217 

234

241 

246 

247 

255 

265

273 

283 

284 

292 

304

4 

3 

NR 

4 

2

3 

4 

NR 

4 

3

1 

2 

4 

3 

2

2 

4 

1 

3 

0

0 

4 

4 

4 

4

0 

3 

2 

0 

4

4 

3 

3 

4 

3

1 

4 

0 

4 

2

3 

0 

1 

0 

3

0 

3 

0 

2 

4

0.19 

-0.79

0.33 

1.03

0.79 

-0.16

-0.32 

0.63

2.03 

-1.03 

0.48 

0.76 

-1.32

1.43 

-0.49 

-1.56 

0.51 

-4.52

9.52 

0.00 

0.29 

-0.27 

0.37

14.12 

0.80 

-1.27 

5.87 

-0.02

0.00 

0.90 

0.79 

-0.30 

-0.54

-1.62 

0.00 

-4.92 

-0.19 

-1.11

0.94 

-9.83 

1.68 

-6.89 

-0.56

-7.08 

0.79 

3.49 

-1.11 

0.00

68.5

61.0

55.5

71.0 

58.9 

52.2 

65.2 

33.5

63.8 

60.3 

64.4

67.0

51.8 

31.0

67.9

84.0 

55.0

57.0 

<50 

64.1

<68

53.7

122.0

151.0 

54.0 

61.9

60.1

55.0

<0.1 

<18.6

17.4

63.2

67.0

60.0 

66.0

74.8

65.0 

66.8

62.0

67.0 

99.0

62.0 

67.7

58.6

62.0 

60.8

72.6 

58.5

67.0 

62.0

76
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

U (Uranium)

18.0

17.0

16.0

15.0

14.0

13.0 4-

12.0

0. Other 

4. ICP 

6. ICP/MS

N =

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

1 0 10

14.8 < 200 12.3

21.8

15.3

0.6

MPV =

F-pseudosigma =

Rating Criterion =

N =

Hu =

Hl =

15.0

0.6

0.8 **

11

15.7 

14.9

Lab Rating Z-value

1

16

30.1

32

121

4 0.00

0 6.80

2 -1.33

3 0.80

0 -3.60

15.0

20.1

14.0

15.6

12.3

127

142

147

217

254

265

283

NR 

0 

4 

4 

4 

3 

2

<200

9.12 

0.00 

0.00

-0.27 14.8 

0.67 

1.07

21.8

15.0

15.0

T5lT 

15.8

77
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)-Continued

V (Vanadium) |ug/L

70.0 

68.0 

66.0 

64.0 

62.0 

60.0 

58.0 

56.0 

54.0 

52.0 

50.0 

48.0 

46.0

(

t

1 r

: / -^***~~"

/ +*+*^ j *++*^ Y ^-^+^&am^^r^

 1 J>+++*^ 

/

y

^0^-3^,+e

). Other 6. ICP/MS 

3. AA: graphite furnace MPV = 

l. ICP F-pseudosigma = 

N= 1 4 39 15 N = 

Minimum = 40.0 50.8 9.5 49.5 Hu = 

Maximum = 89.2 89.0 66.0 HI = 

Median = 58.3 59.7 

F-pseudosigma = 3.9 0.0

Lab

1 

3 

4 

5 

8

11 

13 

16 

18 

24

25 

26 

30.1 

32 

39

40 

42 

46 

48 

68

70 

86 

89 

97 

100

102 

105 

121 

127 

134

136 

138 

141 

142 

145

146 

147 

154 

158 

180

212 

215 

217 

220 

234

235 

236 

237 

241 

246

Rating Z-value 0346 Lab Rating Z-value 0 3

4 -0.16 58.3 247 2 1.20 

4 0.23 60.0 255 3 0.94 

2 -1.24 53.7 256 0 -11.61 

4 0.00 59.0 257 1 -1.94 50.8 

3 -0.94 55.0 265 4 0.16

4 -0.23 58.0 268 1 1.64 

4 -0.42 57.2 283 2 1.50 

4 0.21 59.9 284 0 -4.46 40.0 

3 -0.70 56.0 304 3 0.94 

4 0.00 59.0

4 -0.23 58.0 

4 -0.23 58.0 

3 -0.70 56.0 

4 -0.23 58.0 

4 -0.23 58.0

3 -0.87 55.3 

4 0.30 60.3 

4 0.40 60.7 

3 -0.70 56.0 

4 -0.47 57.0

4 0.00 59.0 

3 0.82 62.5 

0 7.09 89.2 

1 1.83 66.8 

4 -0.38 57.4

4 0.00 59.0 

4 0.00 59.0 

0 -2.23 49.5 

3 -0.94 55.0 

4 -0.16 58.3

4 -0.38 57.4 

4 -0.27 57.9 

1 -1.88 51.0 

4 0.32 60.4 

2 1.41 65.0

4 0.28 60.2 

4 0.00 59.0 

3 0.73 62.1 

3 0.70 62.0 

0 2.53 69.8

4 -0.47 57.0 

0 7.04 89.0 

3 -0.59 56.5 

0 2.58 70.0 

3 -0.89 55.2

2 1.08 63.6 

2 1.17 64.0 

1 1.88 67.0 

4 0.05 59.2 

1 1.55 65.6

59.0 

4.3

59 

62.8 

57.0

4 6

64.1 

63.0 

9.5

59.7

66.0 

65.4

63.0

78
Table 14. Statistical summary of reported data for standard reference sample T-151 (trace constituents)--Continued

Zn (Zinc)

12.00 

10.00 

8.00 

6.00 

4.00 

2.00 

0.00

0

1

2

J**f

: WP° <f   -- p"' ------&----- ^r---

1 >v^,voW . . ^** +4T 

__ _J3CH±^

DO

_______ jxxrv*^^ -^Kxxxxr'^

._x~ _____

4^*+*^*^'

Other 

AA: direct air 

AA: direct nitrous oxide 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

13 

16 

18 

23 

24

25 

26 

30.1 

32 

39

40 

42 

48 

59 

68

69 

70 

83 

87 

89

96 

97 

100 

102 

105

107 

119 

121 

126 

127

134 

136 

138 

140 

141

142 

145 

146 

147 

151

154 

158 

180 

190 

191

Rating Z-value

4 -0.12 

1 1.98 

4 -0.19 

NR 

3 0.86

NR 

4 -0.21 

NR 

NR 

4 -0.34

NR 

4 -0.28 

3 0.51 

4 0.19 

4 0.10

4 -0.30 

4 -0.22 

2 1.09 

3 0.95 

0 80.15

NR 

NR

4 -0.21 

4 -0.27 

0 4.71

NR

3 -0.70 

3 -0.58 

4 0.19 

2 1.49

3 -0.70 

1 1.53 

4 -0.21 

NR 

4 -0.01

3 -0.65 

0 6.40 

4 0.01 

1 1.53 

0 2.34

4 -0.05 

0 2.87 

NR 

4 -0.25 

4 0.06

1 -1.99 

4 0.24 

2 -1.10 

3 0.84 

4 0.19

 - o n 1 o 

4. ICP 

6. ICP/MS 

12. Flame emission 

2 8 1 27 17 1 

14.00 5.00 10.00 2.10 5.80 7.00 

17.10 12.00 186.00 9.90 

6.00 6.55 6.45 

2.22 2.94 1.19

0 1 2 4 6 12

6.30 

11.00 

6.15

8.50

6.10 

<100 

<20 

5.80

<4 

5.93 

7.70 

7.00 

6.80

5.90 

6.08 

9.00 

8.70 

186.00

<50 

<20 

6.10 

5.96 

17.10

5.00 

5.26 

7.00 

9.90

5.00 

10.00 

6.10 

<20 

6.55

5.10 

20.90 

6.58 

10.00 

11.80

6.45 

13.00 

<20 

6.00 

6.70

2.10 

7.10 

4.10 

8.44 

7.00

MPV = 6.57 

F-pseudosigma = 2.24 

N= 56 

Hu = 9.00 

HI = 5.98

Lab Rating Z-value 0 1 2 4 6 12

193 NR <50 

203 4 -0.25 6.00 

204 4 -0.10 6.34 

212 NR <10 

213 NR <10

215 4 -0.25 6.00 

217 NR <20 

220 2 1.09 9.00 

234 4 0.15 6.90 

236 2 -1.15 4.00

237 NR < 10 

241 4 -0.25 6.00 

246 NR < 5 

247 4 -0.07 6.40 

254 NR < 5

255 3 -0.66 5.08 

256 3 -0.70 5.00 

257 4 0.19 7.00 

265 4 -0.34 5.80 

268 NR < 20

273 0 2.43 12.00 

284 0 3.32 14.00 

287 1 1.53 10.00 

292 NR <10 

304 2 1.31 9.50

79
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)

Definition of analytical methods,

Analytical methods

0 Other/Not reported

1 AA: direct, air

2 AA: direct, N2O

3 AA: graphite furnace

4 ICP

5 DCP

6 ICP/MS

7 1C

12 Flame emission

20 Titrate: color

21 Titrate: electro

22 Color:

40 Ion electrode

41 Electro

50 Gravimetric

51 Turbidimetric

Abbreviations and symbols

Constituent

Alk Alkalinity as CaCO3

B Boron

Ca Calcium

Cl Chloride

DSRD Dissolved solids

F Fluoride

K Potassium

Mg Magnesium

Na Sodium

total P Phosphorus

pH

SiO2 Silica

SO4 Sulfate

Sp Cond Specific Conductance

Sr Strontium

V Vanadium

abbreviations, and symbols

=

=

=

=

=

=

=

=

=

=

=

=

=

=

=

N =

MPV =

F-pseudosigma =

Hu =

HI =

H9/L =

mg/L =

uS/cm =

Lab =

NR =

< =

atomic absorption: direct, air

atomic absorption: direct, nitrous oxide

atomic absorption: graphite furnace

inductively coupled plasma

direct current plasma

inductively coupled plasma / mass spectrometry

ion chromatography

flame emission

titration: colorimetric (color reagent specified)

titration: electrometric

colorimetric (color reagent specified)

ion selective electrode

electrometric: (type meter specified)

gravimetric: (precipitate specified)

turbidimetric: (precipitate specified)

number of analyses--(excluding less than values)

most probable value

nonparametric statistic deviation

upper hinge value

lower hinge value

micrograms per liter

milligrams per liter

microsiemens per centimeter at 25° C

laboratory code number

not rated, less than value reported or insufficient data

less than

page

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

80
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

Alkalinity (asCaC03) mg/L

95.0 

90.0 

85.0 

80.0 

75.0

C 

2C

21

---j------------------------^/----" r

13 +.H+pH+H++l ' ' ' ' ' |lH+t+ o< ff»

I +***** I I

T ~ ~----- i~ i --

] | j .. ... A

 - o n 20 

. Other 22. Colorimetric 

. Titrate: colorimetric 41 . Direct reading 

. Titrate: electrometric 

N= 1 8 68 5 9 

Minimum = 95.0 67.0 48.0 74.0 70.8 

Maximum = 258.5 143.0 87.7 93.7 

Median = 86.5 89.3 88.5 

F-pseudosigma = 5.6 2.6 3.9

Lab Rating Z-value 0 20 21 22 41

1 4 0.25 89.9 

3 4 0.27 90.0 

54 0.11 89.3 

8 4 -0.18 88.0 

10 4 0.11 89.3

11 2 -1.19 83.5 

12 4 0.27 90.0 

13 3 -0.63 86.0 

15 4 -0.18 88.0 

16 1 -1.76 81.0

18 3 0.65 91.7 

19 4 0.27 90.0 

23 4 0.27 90.0 

24 3 0.56 91.3 

25 3 0.95 93.0

26 4 0.05 89.0 

32 3 0.59 91.4 

33 4 -0.18 88.0 

34 2 1.04 93.4 

38 4 0.01 88.8

39 2 -1.37 82.7 

40 0 12.21 143.0 

42 4 -0.19 88.0 

43 4 0.50 91.0 

46 4 -0.18 88.0

48 0 -3.33 74.0 

51 4 0.50 91.0 

57 2 -1.08 84.0 

59 4 -0.07 88.5 

68 4 -0.25 87.7

69 3 -0.63 86.0 

70 4 0.50 91.0 

83 4 -0.32 87.4 

84 4 0.02 88.9 

85 4 0.43 90.7

87 4 0.50 91.0 

89 3 0.63 91.6 

96 4 0.50 91.0 

97 2 1.04 93.4 

100 0 -9.19 48.0

105 4 0.00 88.8 

107 3 -0.77 85.4 

118 3 0.72 92.0 

127 3 0.63 91.6 

134 3 0.62 91.6

*. *

+ 21 X 22 O 41

MPV = 88.8 

F-pseudosigma = 3.7 

Rating Criterion = 4.4 ** 

N= 91 

Hu= 91.0 

HI = 86.0

Lab Rating Z-value 0 20 21 22 41

146 3 0.59 91.4 

149 0 -4.91 67.0 

151 4 0.05 89.0 

154 4 0.00 88.8 

158 4 -0.41 87.0

180 4 -0.09 88.4 

190 2 -1.31 83.0 

196 3 -0.86 85.0 

203 3 -0.86 85.0 

204 2 1.10 93.7

212 4 -0.20 87.9 

213 4 0.50 91.0 

215 2 -1.08 84.0 

217 4 0.25 89.9 

218 0 -4.05 70.8

220 4 0.18 89.6 

224 4 0.27 90.0 

234 4 0.50 91.0 

236 4 0.50 91.0 

237 4 -0.50 86.6

241 4 0.27 90.0 

244 4 0.50 91.0 

247 2 -1.08 84.0 

253 3 -0.63 86.0 

255 4 0.00 88.8

256 0 38.22 258.5 

257 4 -0.18 88.0 

259 3 -0.86 85.0 

263 4 -0.29 87.5 

264 4 -0.41 87.0

266 3 0.72 92.0 

267 4 -0.29 87.5 

269 3 -0.68 85.8 

273 4 0.20 89.7 

283 3 0.54 91.2

284 2 1.40 95.0 

286 0 2.46 99.7 

287 1 -1.98 80.0 

292 1 -1.85 80.6 

294 4 0.18 89.6

297 3 -0.63 86.0

D

136 4 -0.02 88.7 

138 3 0.86 92.6 

141.1 4 -0.05 88.6 

142 2 -1.53 82.0 

145 0 -2.88 76.0

81
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

B (Boron)

6 X 22cu

4. ICP 

6. ICP/MS 

22cu. Color: curcumin 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

11 

15 

16 

18 

24

25 

26 

30.1 

32 

40

42 

46 

48 

57 

68

70 

85 

86 

100 

119

127 

134 

136 

138 

141.1

142 

145 

147 

154 

158

180 

212 

215 

217 

220

234 

235 

236 

246 

247

254 

255 

259 

265 

268

Rating

4 

3 

4 

4 

0

4 

0 

0 

NR 

4

0 

3 

4 

4 

1

4 

3 

4 

NR 

0

NR 

3 

4 

0 

NR

4 

4 

0 

4 

0

3 

3 

3 

3 

3

1 

NR 

3 

0 

4

4 

0 

3 

4 

4

3

4 

4 

4 

1

Z-value

-0.06 

0.81 

0.11 

-0.15 

3.29

0.06 

3.48 

22.15

-0.07

-3.16 

-0.54 

-0.43 

0.26 

-1.67

0.08 

-0.92 

-0.43

5.67

0.54 

-0.10 

4.76

-0.28 

0.01 

-4.91 

0.43 

2.55

0.54 

0.81 

-0.56 

-0.74 

-0.84

1.72

-0.84 

-6.30 

-0.21

0.00 

3.84 

-0.84 

0.08 

-0.11

-0.70 

0.33 

-0.01 

-0.01 

1.91

37 7 1 

10.4 43.0 70.0 

207.0 60.0 

46.1 45.3 

7.4 3.2

4 6 22cu

45.7 

52.0 

46.9 

45.0 

70.0

46.5 

71.4 

207.0 

<50 

45.6

<23 

42.2 

43.0 

48.0 

34.0

46.7 

39.4 

43.0 

<100 

87.3

<100 

50.0 

45.4 

80.7 

<100

44.1 

46.2 

10.4 

49.2 

64.6

50.0 

52.0 

42.0 

40.7 

40.0

58.6 

<100 

40.0 

<0.1 

44.6

46.1 

74.0 

40.0 

46.7 

45.3

41.0 

48.5 

46.0 

46.0 

60.0

MPV =

F-pseudosigma =

N =

Hu =

Hl =

Lab Rating Z-value

46.1

7.3

45

52.0

42.2

22cu

273

283

2.33 

-1.43

63.0

35.7

82
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

Ca (Calcium) mg/L

84.0

0. Other 

1. AA: direct air

2. AA: direct nitrous oxide

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

20. Titrate: colorimetric

4

65.1

80.6

18

70.9

88.5

73.7

3.1

3

68.5

73.8

57

19.8

137.9

74.2

3.0

5

60.0

79.5

8

72.1

76.0

74.5

1.7

20

MPV'

F-pseudosigma : N = HIT

Hh

74.0

3.2

95

76.0

71.7

Lab Rating Z-value 20

1 

3 

5 

8 

10

11 

13 

15 

16 

18

19 

24 

25 

26 

30.1

30.2 

32 

33 

38 

39

40 

43 

46 

48 

51

57 

59 

64 

68 

69

70 

83 

84 

85 

86

87 

89 

97 

100 

102

105 

107 

119 

121 

127

134 

136 

138 

140 

141.1

4 

2

1 

3 

4

3 

3 

4 

4 

3

4 

4 

4 

4

0

3 

1 

0 

4 

2

4 

4 

3 

2 

2

3 

4 

4 

4

3

3 

4 

4

3 

3

1 

0 

4 

3 

3

3 

4 

4 

4

3

4 

0 

4 

3

0

0.32 

1.17 

-1.79 

0.76 

-0.19

0.95 

-0.85 

-0.03 

0.32 

-0.94

-0.47 

-0.06 

0.44 

0.35 

-4.40

-0.94 

1.73 

2.08 

-0.06 

-1.13

0.07 

0.07 

-0.59 

1.10 

1.04

-0.75 

-0.06 

0.47 

0.32 

-0.78

0.92 

-0.44 

-0.12 

-0.69 

0.57

-1.73 

4.56 

-0.34 

0.60 

-0.94

-0.63 

-0.03 

-0.31 

0.00 

0.79

0.14 

-17.04 

0.30 

-0.94 

-2.86

75.0 

77.7 

68.3 

76.4 

73.4

77.0 

71.3 

73.9 

75.0 

71.0

72.5 

73.8 

75.4 

75.1 

60.0

71.0 

79.5 

80.6 

73.8 

70.4

74.2 

74.2 

72.1 

77.5 

77.3

71.6 

73.8 

75.5 

75.0 

71.5

76.9 

72.6 

73.6 

71.8 

75.8

68.5 

88.5 

72.9 

75.9 

71.0

72.0 

73.9 

73.0 

74.0 

76.5

74.4 

19.8 

75.0 

71.0 

64.9

Lab Rating Z-value 20

142 

145 

146 

147 

149

154 

158 

180 

190 

191

196 

203 

204 

209 

212

215 

217 

218 

220 

221

230 

234 

235 

236 

241

246 

247 

254 

255 

256

257 

259 

263 

264 

265

266 

267 

268 

269 

273

283 

284 

287 

292 

297

4 

4 

2 

2 

4

1 

0 

4 

1 

3

4 

3 

4 

0 

4

0 

3 

3 

4 

3

0 

3 

1 

3 

0

4 

1 

4 

4 

4

4 

4

3 

3 

3

4 

4 

3 

3 

4

2 

2 

3

3 

3

-0.12 

0.16 

-1.32 

-1.25 

0.32 75.0

-1.85 

2.20 

0.35 

-1.88 68.0 

-0.59

0.18 74.6 

-0.91 71.1 

-0.47 72.5 

20.09 

0.19

-2.32 

-0.94 

0.63 

-0.38 

-0.97 70.9

-2.80 65.1 

0.76 

1.58 

-0.75 

2.86 83.1

0.00 

1.76 

-0.09 

0.47 

0.43

0.32 

-0.31 

0.63 

0.63 

0.60

0.00 

-0.09 

0.95 

-0.59 

-0.12

1.04 

-1.35 69.7 

0.63 76.0 

0.85 76.7 

0.85

73.6 

74.5 

69.8 

70.0

68.1 

81.0 

75.1

137.9 

74.6

66.6 

71.0 

76.0 

72.8

76.4 

79.0 

71.6

74.0 

79.6 

73.7 

75.5

75.9

73.6

77.3 

76.7

72.1

75.4

75.0 

73.0 

76.0 

76.0

74.0 

73.7 

77.0 

72.1

83
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

Cl (Chloride) mg/L

-21 X 22

0. Other 

7. Ion chromatography

20. Titrate: colorimetric

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

21. Titrate: electrometric 

22. Colorimetric

40. Ion selective electrode

3

71.0

88.7

50

69.3

86.2

77.0

2.4

8

6.0

96.0

76.5

6.1

9

73.8

80.5

77.2

2.7

24

71.0

81.7

77.6

1.8

4

69.3

76.7

40

MPV:

F-pseudosigma :

N:

HIT 

Hl =

Lab Rating Z-value 20 22 40

1

3 

5 

8 

10

11 

12 

13 

15 

16

18 

19 

23 

24 

25

26 

30.1 

32 

33 

39

40 

42 

46 

48 

51

57 

59 

64 

68 

69

70 

76 

83 

84 

85

86 

87 

89 

96 

97

100 

102 

105 

107 

119

127 

134 

138 

140 

141.1

4 

4 

3 

1 

4

2

4 

3 

0 

3

2 

3 

3 

4

4

4 

3 

4 

3 

1

2 

2 

4

1 

0

3 

3 

4 

4 

4

1 

4 

3 

2 

4

4 

4 

4 

4 

4

1 

4 

4 

3 

3

2

4 

4 

3 

3

-0.25 

0.19 

-0.97 

-1.88 

0.35

1.25 

0.00 

-0.56 

-2.13 

-0.72

1.29 

-0.63 

-0.69 

0.03 

-0.03

0.31 

-0.66 

-0.28 

-0.82 

1.73

-1.04 

1.04 

0.22 

-1.88 

2.89

-0.94 

-0.69 

0.22 

0.28 

0.31

1.88 

0.24 

-1.00 

1.25 

0.28

0.35 

-0.31 

-0.50 

0.41 

0.19

1.69 

-0.03 

0.00 

-0.63 

-0.78

1.13 

0.17 

-0.25 

0.60 

-0.82

76.2

73.9 

71.0

75.2 

70.2

75.0 

76.9

78.0 

74.9 

76.1 

74.4 

82.5

80.3 

86.2

74.0 

74.8 

77.7

83.0 

77.8 

73.8 

81.0 

77.9

78.1 

75.4

82.4

77.0 

75.0 

74.5

80.6 

77.5 

76.2

77.6 

78.1

81.0 

77.0

74.7

81.1

74.8 

77.1

73.7

77.7 

71.0

77.9 

78.0

76.0

78.3 

77.6

76.9

78.9 

74.4

Lab Rating Z-value

77.0

3.2

98

79.2

74.9

20 22 40

141.2 

142 

145 

146 

149

151 

154 

158 

180 

190

191 

196 

203 

204 

208

212 

213 

215 

217 

220

221 

224 

230 

234 

236

241 

246 

247 

255 

256

257 

259 

263 

264 

265

266 

267 

268 

269 

270

273 

283 

284 

286 

287

292 

294 

297

0 

3 

2 

3

1

4 

4 

1 

4 

1

4 

1 

4 

3 

3

2 

4 

0 

3 

2

4 

4 

4 

4 

2

3 

3 

4 

3 

4

4 

3 

2 

3 

4

3 

4 

4 

2 

4

0 

1 

0 

3 

0

4 

3 

4

-2.42 

0.69 

1.07 

0.75 

-1.88

0.00 

-0.13 

1.91 

-0.35 

-1.69

0.03 

-1.85 

-0.22 

-0.72 

-0.82

1.07 

-0.31 

5.96 

-0.56 

1.46

-0.03 

0.37 

0.38 

0.35 

1.25

0.60 

-0.69 

0.09 

0.78 

-0.10

0.00 

0.94 

1.41 

0.94 

-0.22

0.63 

0.06 

0.31 

1.10 

0.00

-2.42 

-1.60 

3.67 

-0.94 

-22.27

0.19 

0.72 

-0.31

69.3 

79.2 

80.4 

79.4 

71.0

77.0 

76.6 

83.1 

75.9 

71.6

77.1 

71.1 

76.3 

74.7 

74.4

80.4 

76.0 

96.0 

75.2 

81.7

76.9 

78.2 

78.2 

78.1 

81.0

78.9 

74.8 

77.3 

79.5 

76.7

77.0 

80.0 

81.5 

80.0 

76.3

79.0 

77.2 

78.0 

80.5 

77.0

69.3 

71.9 

88.7 

74.0 

6.0

77.6 

79.3 

76.0

84
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituentsJ-Continued

DSRD (Dissolved solids) mg/L

590

7 D 50

0. Other 

7. Ion chromatography

50. Gravimetric

Lab

1

3

5

8

10

11

12

13

15

16

18

19

23

25

26

32

39

40

43

46

48

51

57

59

69

70

85

87

89

96

97

100

105

118

119

127

134

138

140

141.1

142

146

154

158

190

212

215

217

221

224

N= 2

Minimum = 524

Maximum = 1548

Median =

F-pseudosigma =

Rating Z-value 0

3 0.57

4 0.28

4 0.50

4 0.50

4 0.07

3 -0.99

2 -1.14

3 -0.85

3 0.99

2 -1.49

2 -1.14

4 -0.07

4 0.00

0 -2.41

2 1.14

3 0.92

4 -0.43

4 0.14

4 0.28

4 0.14

4 0.28

4 -0.43

4 0.28

4 0.14

4 0.07

4 0.00

1 -1.70

3 0.71

4 -0.36

2 1.07

2 1.07

4 0.14

0 3.27

0 2.63

2 -1.21

0 2.27

3 0.69

3 -0.78

4 0.21

4 -0.43

2 -1.14

3 -0.57

4 0.14

4 0.07

3 -0.85

3 -0.64

3 -0.92

4 -0.21

1 1.70

3 -0.57

1 61

78 496

592

547

12

7 50

554

550

553

553

547

532

530

534

560

525

530

545

546

512

562

559

540

548

550

548

550

540

550

548

547

546

522

556

541

561

561

548

592

583

529

578

556

535

549

540

530

538

548

547

534

537

533

543

570

538

MPV =

F-pseudosigma =

N =

Hu =

Hl =

Lab Rating Z-value

546

14

64

553

534

50

234

236

241

247

253

257

259

263

266

273

283

284

292

4

4

4

2

0

3

4

1

4

1

0

0

0

-0.28

-0.43

-0.50

-1.07

2.63

0.85

0.50

-1.56 524

-0.07

-1.70

-3.55

71.14 1548

3.05

542

540

539

531

583

558

553

545

522

496

589

85
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

F (Fluoride) mg/L

-40

0. Other 

7. Ion chromatography

40. Ion selective electrode

Lab

1

3

8

10

11

13

15

16

18

24

25

32

39

40

42

46

48

57

59

69

70

76

83

84

85

86

89

96

97

100

105

107

119

127

134

138

140

141.1

141.2

142

145

146

149

151

154

158

180

190

196

208

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Rating Z-value

3 -0.51

4 -0.48

0 -2.29

4 -0.25

0 11.96

0 -2.34

2 -1.45

4 0.25

4 0.00

4 0.38

4 0.00

3 0.56

4 0.23

3 -0.84

1 1.53

3 -0.76

2 -1.02

4 0.25

2 1.02

3 -0.51

2 -1.27

3 0.87

4 0.25

3 0.59

3 -0.51

0 2.39

4 -0.25

4 -0.05

4 -0.36

4 0.08

NR

2 -1.12

3 -0.51

4 -0.43

4 -0.25

4 0.25

4 -0.38

2 1.02

3 0.76

4 0.25

3 -0.76

4 0.03

3 -0.51

2 -1.02

2 1.20

0 2.37

0 -8.18

0 -2.80

0 -2.09

NR

1 20

0.35 0.12

0.45

0.21

0.09

0 7

0.14

0.14

0.29

0.25

0.32

<0.2

0.21

0.26

0.20

0.21

0.32

<0.05

0.12

0.15

<3

48

0.17

0.70

0.23

0.03

40

0.21

0.21

0.22

0.70

0.17

0.24

0.23

0.25

0.23

0.25

0.24

0.20

0.20

0.19

0.24

0.27

0.21

0.18

0.26

0.24

0.21

0.22

0.23

0.22

0.23

0.19

0.21

0.22

0.24

0.22

0.27

0.24

0.23

0.19

0.28

MPV =

F-pseudosigma =

N =

Hu =

Hl =

Lab Rating Z-value

0.23

0.04

69

0.26

0.21

40

212 

215 

217 

230 

234

236 

241 

246 

247 

255

257 

259 

263 

265 

266

269 

273 

283 

284 

286

287 

292 

294

3 

4 

2 

2 

3

1 

3 

NR 

2 

3

2 

4 

4 

3 

3

4 

4 

0 

0 

0

2 

3 

2

-0.51 

0.05 

-1.02 

-1.27 

-0.59

2.04 

-0.61

-1.30 

0.84

1.02 

0.00 

-0.25 

0.51 

0.76

0.38 

0.08 

3.82 

3.05 

5.60

1.45 

-0.76 

1.27

0.180 

0.207

0.310

<0.5 

0.179

0.380 

0.350 

0.450

0.200 

0.280

0.210 

0.232 

0.190

0.206 

0.263

0.270 

0.230 

0.220 

0.250 

0.260

0.245 

0.233

0.287

86
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

K (Potassium) mg/L

4.20 -

4.00 -

3£0 -^

3.40 rj 1 

3.20 -- /

3.00 - T

o an

0. Other 

1. M: direct air 

4. ICP 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab Rating Z-value

1 4 -0.15 

3 4 0.15 

5 1 -1.77 

81 1.54 

10 4 -0.15

11 2 -1.12 

13 3 0.66 

15 4 -0.12 

16 3 0.77 

18 3 0.77

19 3 -0.81 

24 3 -1.00 

25 4 0.00 

26 4 0.12 

32 3 0.77

33 4 0.23 

38 3 0.69 

40 3 -0.66 

43 4 0.00 

46 3 -0.69

48 3 0.85 

51 4 -0.04 

57 0 2.70 

59 2 1.16 

64 3 1.00

68 4 0.50 

69 2 1.27 

70 2 1.23 

83 4 -0.23 

85 4 0.08

86 4 -0.46 

87 1 -1.85 

89 3 -0.85 

97 4 -0.39 

100 3 -0.69

102 1 -1.93 

105 4 -0.50 

107 0 3.58 

119 0 -2.31 

127 4 0.23

134 4 -0.05 

138 4 -0.39 

140 3 -0.77 

141.1 0 -2.31 

142 4 -0.04

145 3 -0.85 

146 3 0.62 

149 4 -0.39 

154 0 5.86 

158 1 1.54

0

^Jrrcrf** 3*1^

_ijJJ

>****

^.-0-,^

6. ICP/MS 

7. Ion chromatography 

12. Flame emission 

2 26 40 4 3 7 

3.66 1.37 3.00 3.70 3.34 3.59 

3.74 5.71 5.12 3.82 3.63 5.00 

3.56 3.56 3.80 

0.22 0.26 0.44

0 1 4 6 7 12

3.56 

3.64 

3.14 

4.00 

3.56

3.31 

3.77 

3.57 

3.80 

3.80

3.39 

3.34 

3.60 

3.63 

3.80

3.66 

3.78 

3.43 

3.60 

3.42

3.82 

3.59 

4.30 

3.90 

3.86

3.73 

3.93 

3.92 

3.54 

3.62

3.48 

3.12 

3.38 

3.50 

3.42

3.10 

3.47 

4.53 

3.00 

3.66

3.59 

3.50 

3.40 

3.00 

3.59

3.38 

3.76 

3.50 

5.12 

4.00

yw^X^OO^"^ ^^ A,J§^~

^v<>C^^^^ J* 5000*-^ a£

,+e+7 ^-,2

MPV = 3.60 

F-pseudosigma = 0.26 

N= 82 

Hu = 3.80 

HI = 3.45

Lab Rating Z-value 01467

180 3 -0.69 3.42 

190 3 -0.69 3.42 

191 4 0.42 3.71 

196 4 -0.35 3.51 

203 2 1.12 3.89

204 4 0.27 

209 0 -8.60 1.37 

212 NR <5 

215 0 -10.00 <1 

217 NR <5

218 1 1.54 4.00 

220 0 4.63 4.80 

221 3 0.69 3.78 

230 3 -1.00 3.34 

234 4 0.04 3.61

236 4 -0.35 3.51 

241 3 0.77 3.80 

246 3 0.89 3.83 

247 2 1.35 3.95 

254 4 -0.39 3.50

255 4 -0.19 3.55 

256 0 4.20 

257 0 5.40 

259 4 -0.42 3.49 

264 4 0.00 3.60

265 4 -0.27 3.53 

266 3 0.77 

268 4 0.39 3.70 

270 3 0.58 

273 3 -0.58 3.45

283 3 -0.66 3.43 

284 3 0.56 3.74 

287 0 8.13 5.71 

292 3 -0.77 3.40 

297 4 -0.08 3.58

[

12

3.67

4.69 

5.00

3.80 

3.75

87
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

Mg (Magnesium) mg/L

0. Other

1 . AA: direct air 

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

7. Ion chromatography 

20. Titrate: colorimetric

7

16.3

18.5

17.2

0.6

22

15.3

17.4

16.7

0.4

57

4.3

35.1

17.0

0.7

5

16.0

18.6

2

16.1

16.3

2

17.0

17.2

Lab Rating Z-value 20

1

3 

5 

8 

10

11 

13 

15 

16 

18

19 

24 

25 

26

30.1

30.2 

32 

33 

38 

39

40 

43 

46 

48

51

57 

59 

64 

68 

69

70 

83 

84 

85 

86

87 

89 

97 

100 

102

105 

107 

119 

121 

127

134 

136 

138 

140 

141.1

4 

2 

4 

4 

4

4 

4 

4 

4 

0

4 

4 

0 

3 

1

4 

0 

4 

3 

4

1 

4 

2 

0

1

1 

4 

4 

2 

4

3 

3 

3 

4 

3

3 

4 

4 

2

1

2 

3 

4 

4 

3

4 

0 

4 

2 

0

0.29 

1.27 

-0.32 

0.48 

0.00

0.48 

-0.32 

0.00 

-0.16 

-2.38

-0.32 

-0.16 

2.22 

0.63 

-1.59

0.00 

2.54 

0.16 17.1 

0.65 

-0.32

-1.75 

0.00 

-1.11 

2.06 

-1.90

-1.59 

0.00 

-0.50 

1.27 

-0.48

0.79 

-0.95 

-0.95 

-0.48 

0.95

-0.95 

0.48 

-0.32 

1.27 

1.59

-1.11 

-0.79 

0.00 

0.16 

-0.79

0.37 

-20.20 

-0.35 

-1.11 

-4.13

17.0

17.0 

17.4

15.8

17.0 

16.7

16.4 

16.7

16.4 

17.3 

16.8

16.5

16.3

17.2 

17.8 

16.8 

17.3

17.3 

16.8 

17.0 

16.9 

15.5

16.8 

16.9 

18.4 

17.4 

16.0

18.6 

16.8

15.9 

17.0 

16.3 

18.3

16.0

16.7 

17.8

17.5 

16.4

17.6

17.8 

18.0

16.3

17.0 

17.1 

16.5

17.2 

4.3 

16.8

14.4

-20

MPV'

F-pseudosigma :

Hl =

17.0

0.6

95

17.4

16.5

Lab Rating Z-value 20

142 

145 

146 

147 

149

154 

158 

180 

190 

191

196 

203 

204 

209 

212

215 

217 

218 

220 

221

230 

234 

235 

236 

241

246 

247 

254 

255 

256

257 

259 

263 

264 

265

266 

267 

268 

269 

273

283 

284 

287 

292 

297

2 

4 

2 

1 

3

0 

1 

4 

2 

4

4 

3 

4 

0 

3

0 

3 

0 

3 

4

2 

4 

1 

4 

4

2 

3 

4 

4 

4

4 

4 

2 

0 

3

4 

0 

1 

4 

4

0 

0 

4 

4 

4

1.43 

0.43 

-1.27 

-1.59 

-0.79

-2.38 

1.59 

0.00 

-1.43 

0.13

-0.06 

-0.63 

-0.48 

28.76 

0.63

-3.02 

-0.63 

4.76 

-0.73 

0.32

-1.11 

-0.32 

1.59 

-0.16 

0.48

1.27 

0.63 

0.00 

-0.32 

0.24

0.00 

0.32 

-1.11 

-2.70 

0.79

0.48 

2.38 

1.59 

0.16 

0.00

2.86 

2.38 

0.00 

0.16 

-0.16

17.9 

17.3 

16.2 

16.0 

16.5

15.5 

18.0 

17.0 

16.1 

17.1

17.0 

16.6 

16.7 

35.1 

17.4

15.1 

16.6 

20.0 

16.5 

17.2

16.3 

16.8 

18.0 

16.9 

17.3

17.8 

17.4 

17.0 

16.8 

17.2

17.0 

17.2 

16.3 

15.3 

17.5

17.3 

18.5 

18.0 

17.1 

17.0

18.8 

18.5 

17.0 

17.1 

16.9

88
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)--Continued

Na (Sodium) mg/L

12

0. Other 

1. AA: direct air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

7. Ion chromatography 

6. ICP/MS

12. Flame emission

2

76.0

79.3

21

60.8

82.0

76.3

3.8

52

51.1

89.0

77.9

2.7

5

72.0

84.5

2

76.8

80.6

9

72.7

80.0

77.0

1.3

F-pseudosigma =

Hu = 

Hl =

Lab Rating Z-value 12

1

3 

5 

8 

10

11 

13 

15 

16 

18

19 

24 

25 

26 

30.1

30.2 

32 

33 

38 

39

40 

43 

46 

48 

51

57 

59 

64 

68 

69

70 

83 

84 

85 

86

87 

89 

97 

100 

102

105 

107 

119 

121 

127

134 

138 

140 

141.1 

142

4 

3 

3 

3 

4

0 

4 

4 

4 

4

1 

4 

0 

4 

0

3 

0 

3 

0 

4

2

4 

4 

0 

4

2

1 

4 

3 

4

3 

4 

4 

3 

3

3 

2 

3 

2

0

4 

4 

3 

4 

4

4 

4 

1 

0 

2

0.39 

-0.54 

0.79 

0.61 

-0.25

-2.05 

0.00 

0.18 

0.47 

0.04

-1.83 

0.00 

2.41 

0.50 

-2.05

0.83 

2.27 

-0.61 

-2.05 

-0.40

-1.08 

-0.36 

-0.25 

2.45 

-0.25

-1.30 

-1.73 

0.14 

-0.58 

-0.40

0.90 

0.00 

-0.04 

-0.83 

0.83

0.65 

1.22 

-0.68 

1.04 

-5.65

0.04 

-0.29 

-0.61 

0.47 

-0.32

-0.31 

0.32 

1.55 

-3.96 

1.37

77.0

76.0 

72.0

72.9 

78.1

75.4

79.5 

81.1 

75.8

76.9

76.9 

82.0

78.8 

76.2 

79.9 

79.4

72.0 

111 

78.2 

79.0 

77.8

72.6 

77.7 

84.4 

79.1 

72.0

84.0 

76.6

74.7 

76.7 

77.0 

84.5

74.1 

76.1

80.2 

77.7

80.0

80.6 

62.0

77.8

76.0 

79.0 

76.8

78.6

66.7 

81.5

80.0

77.0

76.6

77.6

Lab Rating Z-value

77.7

2.8

91

79.6

75.8

12

145 

146 

149 

154 

158

180 

190 

191 

196 

203

204 

209 

212 

215 

217

218 

220 

221 

230 

234

236 

241 

246 

247 

254

255 

256 

257 

259 

264

265 

266 

268

270 

273

283 

284 

286 

287 

292

4 

2 

3 

3

4

3 

4 

4 

2 

1

4 

0 

3 

0 

4

0 

4 

4 

2 

3

2

0 

4 

2 

4

2

1 

1 

4 

4

4 

4 

1 

4 

2

1 

3 

0 

3 

0

0.05 

1.19 

-0.97 

-0.68 

0.11

0.54 

-0.32 

-0.04 

1.40 

-1.76

-0.50 

-2.31 

0.90 

-2.99 

-0.32

4.06 

0.37 

0.07 

1.04 

0.68

-1.15 

-2.77 

-0.11 

1.04 

0.11

1.12 

-1.81 

-1.51 

-0.22 

0.11

-0.22 

0.47 

1.55 

0.11 

1.20

1.65 

0.56 

-9.57 

-0.97 

-6.08

75.0

81.6 

72.8

71.3

77.9

70.0

77.1 

78.0

79.3

75.0 

60.8

77.9 

81.0

75.8 

78.0

79.2 

77.6

80.2 

69.4 

76.8

89.0 

78.7

79.6

74.5

77.4 

80.6 

78.0

80.8

77.1 

82.0 

81.0

82.3 

51.1

76.8

76.3

80.6

72.7 

73.5

79.0 

78.0

297 0.97 80.4

89
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued 

total P as P (total Phosphorus as phosphorus) mg/L

0.060 

0.050 

0.040 

0.030 

0.020 

0.010 - 

n nnn

. - _ . ^f 

x^

] ^x-****'

«. .. \x \x \x vx vx vx vx vx vx vx vx-X-X "^v

4 + xxxxxxxxxxx

v..v.. \/ \/ \/ ^ v v y-1^

y.XX'XXX 

-6 X 22m

0. Other 22m. Color: phosphomolybdate 

4. ICP

6. ICP/MS

N= 0

Minimum = <0.1

Maximum =

Median =

F-pseudosigma =

3

0.027

0.109

1 52

0.027 0.015

0.103

0.030

0.011

Lab Rating Z-value 22m

MPV= 0.030

F-pseudosigma = 0.011

N= 56

Hu = 0.040

HI = 0.025

1

3 

8 

12 

13

15 

16 

18 

25 

38

39 

46 

48 

57 

68

70 

83 

85 

86 

87

89 

102 

105 

107 

118

119 

127 

134 

138 

140

141.1 

142 

145 

146 

149

151 

154 

158 

180 

190

191 

203 

204 

212 

213

215 

217 

220 

221 

224

2 

3 

3 

4 

NR

4 

4 

3 

NR 

4

4 

4 

3 

0 

3

NR 

0 

4 

0 

3

3 

4 

3 

2 

4

4 

3 

3 

4 

0

0 

4 

3 

0 

4

4 

3 

NR 

3 

3

4 

4 

4 

NR 

4

4 

NR 

0 

0 

2

-1.35 

-0.90 

0.90 

0.00

0.00 

-0.14 

-0.63

-0.27

0.00 

0.00 

-0.90 

3.60 

0.72

4.41 

-0.18 

7.10 

0.90

-0.90 

-0.45 

-0.90 

-1.17 

0.00

0.00 

-0.86 

-0.90 

-0.07 

3.60

2.70 

0.18 

-0.90 

6.57 

-0.27

-0.36 

-0.54

0.63 

-0.99

-0.27 

0.00 

-0.24

0.00

0.00

3.06 

2.70 

1.35

0.015 

0.020 

0.040 

0.030 

<0.05

0.030 

0.028 

0.023 

< 0.121 

0.027

0.030 

0.030 

0.020 

0.070 

0.038

<0.1 

0.079 

0.028 

0.109 

0.040

0.020 

0.025 

0.020 

0.017 

0.030

0.030 

0.020 

0.020 

0.029 

0.070

0.060 

0.032 

0.020 

0.103 

0.027

0.026 

0.024 

<0.03 

0.037 

0.019

0.027 

0.030 

0.027 

<0.05 

0.030

0.030 

<0.05 

0.064 

0.060 

0.045

Lab Rating Z-value 22m

234

236

241

243

246

4

4

3

4 

NR

253 0

254 NR

257 1

259 4

264

283 0

284 NR

286 3

287 NR

292 4

294

0.27

-0.27

-0.99 

0.00

2.07

1.80

-0.27

-0.45

3.42

0.90

0.00

0.18

0.027 

<0.07

0.033

0.019

0.030

0.053

0.050

0.027

0.025

0.068

0.040 

<0.1 

0.030

0.032

90
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)--Continued

PH

9.60 

9.10 

8.60 

8.10 

7.60 

7.10

t

ffrrtfattsff^> ^^^-yprc-QQgjQQQOOOOCOOOOOffiUQOOO^^ ** '"*** * * *-* ra***^******^*^

^pjxfflJ 

11. Direct reading

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

11 

12 

13 

15 

16

18 

19 

23 

24 

25

26 

30.1 

32 

33 

38

39 

40 

42 

43 

46

48 

51 

57 

59 

64

68 

69 

70 

76 

84

85 

86 

87 

89 

96

97 

100 

107 

118 

119

127 

134 

136 

138 

140

Rating

3 

3

4 

4 

4

4 

4 

4 

4 

4

4 

4 

4 

4 

4

4 

4

4 

4 

4

4 

1 

2 

4 

3

4 

4 

3 

4 

4

3

4 

4 

4 

4

4 

4 

4 

4 

3

4 

4 

4 

4 

4

4 

4 

3 

4 

2

Z-value

-0.67 

0.55 

-0.36 

0.36 

0.31

-0.14 

-0.48 

0.29 

0.14 

0.05

-0.31 

0.19 

0.24 

0.00 

0.12

-0.24 

0.43 

0.19 

0.14 

0.24

0.26 

1.88 

1.36 

-0.05 

-0.90

-0.48 

-0.12 

-0.71 

-0.40 

-0.07

0.88 

0.19 

0.26 

0.26 

0.07

0.29 

0.21 

-0.29 

-0.05 

0.62

0.24 

-0.12 

-0.10 

-0.24 

0.36

0.31 

-0.14 

-0.57 

0.10 

-1.43

 O 41

MPV = 8.40 

F-pseudosigma = 0.17 

97 Rating Criterion = 0.42 ** 

7.75 N = 97 

9.19 Hu = 8.50 

8.40 HI = 8.28 

0.17

41 Lab Rating Z-value 41

8.12 141.1 4 -0.36 8.25 

8.63 142 4 0.24 8.50 

8.25 146 4 0.05 8.42 

8.55 149 4 0.00 8.40 

8.53 151 4 0.00 8.40

8.34 154 4 0.36 8.55 

8.20 158 4 -0.05 8.38 

8.52 180 4 0.33 8.54 

8.46 190 4 -0.48 8.20 

8.42 196 4 0.50 8.61

8.27 203 4 -0.48 8.20 

8.48 204 4 0.36 8.55 

8.50 209 4 -0.48 8.20 

8.40 212 4 0.00 8.40 

8.45 213 4 0.12 8.45

8.30 215 4 -0.24 8.30 

8.58 217 4 0.24 8.50 

8.48 218 4 0.24 8.50 

8.46 221 4 0.26 8.51 

8.50 224 4 0.00 8.40

8.51 234 4 0.00 8.40 

9.19 236 4 0.26 8.51 

8.97 237 4 0.17 8.47 

8.38 241 4 -0.21 8.31 

8.02 243 4 -0.36 8.25

8.20 244 4 0.17 8.47 

8.35 246 3 -0.64 8.13 

8.10 247 4 0.26 8.51 

8.23 253 3 -0.95 8.00 

8.37 255 4 0.24 8.50

8.77 256 4 0.33 8.54 

8.48 257 1 -1.55 7.75 

8.51 259 4 -0.36 8.25 

8.51 263 3 -0.60 8.15 

8.43 264 4 -0.24 8.30

8.52 266 4 0.24 8.50 

8.49 267 4 -0.29 8.28 

8.28 269 4 -0.17 8.33 

8.38 270 4 -0.24 8.30 

8.66 273 4 -0.24 8.30

8.50 283 2 1.19 8.90 

8.35 284 4 -0.26 8.29 

8.36 286 3 -0.90 8.02 

8.30 287 4 0.12 8.45 

8.55 292 4 -0.40 8.23

8.53 294 4 -0.43 8.22 

8.34 297 4 0.00 8.40 

8.16 

8.44 

7.80

91
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

Si02 (Silica) mg/L

8.40 

7.90 

7.40 

6.90 

6.40 

5.90

i

/-

[ ^oo**^ / *f

1 j&O^^^ A / vvXXX *

/ ^^A*^ A / .wWXX ..;* M- --- Ywwy^^^0^" / ^^XXX*"' *

^^^ t X*^ 7 * vX

- >x^

). Other 

1. ICP 

3. DCP

Lab

1 

3 

5 

8 

10

11 

13 

15 

18 

24

25 

26 

32 

33 

38

40 

43 

46 

57 

64

68 

70 

83 

85 

87

89

97 

100 

102 

105

107 

118 

119 

121 

127

134 

138 

140 

142 

145

147 

149 

151 

190 

191

203 

204 

212 

215 

217

 0 ^ 4 A 5 + 6 X 22mb * 22sulf

6. ICP/MS 

22mb. Color: molybdate blue MPV = 7.43 

22sulf. Color: sulfonic acid F-pseudosigma = 0.50 

N= 3 34 1 3 24 2 N = 67 

Minimum = 6.60 5.19 7.51 6.65 6.31 7.39 Hu = 7.74 

Maximum = 8.33 12.10 8.21 8.77 7.61 HI = 7.06 

Median = 7.44 7.35 

F-pseudosigma = 0.53 0.43

Rating

4 

2 

4 

4 

4

0 

4 

2 

0 

2

0 

2 

3 

4 

4

3 

4 

4 

3 

4

2

3 

2 

4 

3

4 

4 

2

1 

3

4 

4 

3 

3 

3

3 

4 

4 

1 

4

4 

2 

3 

4 

1

4 

2

3 

0 

3

Z-value 0456 22mb 22sulf Lab Rating Z-value 0456 22mb 22sulf

-0.26 7.30 234 4 0.00 7.43 

1.11 7.99 236 0 -3.63 5.60 

0.04 7.45 241 2 -1.13 6.86 

-0.26 7.30 246 3 0.69 7.78 

0.34 7.60 247 0 2.65 8.77

-2.52 6.16 254 4 -0.46 7.20 

0.32 7.59 255 4 0.02 7.44 

1.49 8.18 259 3 -0.85 7.00 

-2.22 6.31 263 1 -1.64 6.60 

1.19 8.03 264 1 -2.04 6.40

9.25 12.10 265 4 -0.26 7.30 

1.03 7.95 266 1 -1.64 6.60 

0.93 7.90 268 1 -1.55 6.65 

0.16 7.51 273 4 -0.06 7.40 

-0.28 7.29 283 3 0.55 7.71

-0.61 7.12 284 1 1.78 8.33 

0.34 7.60 294 3 0.55 7.71 

0.26 7.56 

0.81 7.84 

-0.32 7.27

-1.13 6.86 

-0.67 7.09 

-1.03 6.91 

0.14 7.50 

-0.79 7.03

0.36 7.61 

-0.20 7.33 

1.29 8.08 

-2.04 6.40 

0.71 7.79

-0.14 7.36 

0.08 7.47 

-0.85 7.00 

-0.53 7.16 

-0.83 7.01

0.66 7.76 

-0.08 7.39 

-0.36 7.25 

1.86 8.37 

0.10 7.48

-0.46 7.20 

-1.05 6.90 

0.53 7.70 

0.50 7.68 

1.55 8.21

-0.34 7.26 

1.31 8.09 

0.53 7.70 

-4.44 5.19 

-0.69 7.08

92
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

S04 (Sulfate) mg/L

7 X 22mtb 51

0. Other 

4. ICP 

7. Ion chromatography 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

5 

8 

10

11 

12 

13 

15 

16

18 

19 

23 

24 

25

26 

30.1 

32 

33 

34

39 

42 

43 

46 

51

57 

59 

64 

68 

69

70 

76 

83 

84 

85

86 

87 

89 

96 

97

100 

102 

105 

119 

127

134 

138 

140 

141.1 

141.2

Rating Z-value

4 -0.01 

1 -1.84 

2 -1.35 

3 -0.86 

3 0.86

4 0.12 

2 1.23 

4 0.12 

4 -0.12 

0 -3.42

4 -0.12 

3 -0.74 

0 3.43 

0 7.24 

2 -1.35

4 0.37 

4 -0.25 

4 0.00 

4 -0.49 

3 -0.86

2 1.23 

3 0.60 

4 -0.12 

3 0.74 

1 1.89

0 -3.68 

0 -2.06 

4 0.38 

0 -2.21 

1 -1.59

2 -1.35 

4 0.20 

4 -0.01 

4 -0.49 

4 0.12

3 0.61 

4 -0.37 

3 -0.74 

3 0.61 

1 1.84

4 0.00 

0 4.91 

0 -2.39 

4 0.00 

4 0.25

4 0.06 

4 0.25 

4 0.49 

0 2.21 

1 -1.59

22mtb. Color: methyl thymol blue 

50. Gravimetric 

SLTurbidimetric 

3 2 56 14 2 14 

199 210 103 55 209 165 

215 212 225 269 209 238 

210 208 214 

7 19 9

047 22mtb 50 51

210 

195 

199 

203 

217

211 

220 

211 

209 

182

209 

204 

238 

269 

199

213 

208 

210 

206 

203

220 

215 

209 

216 

225

180 

193 

213 

192 

197

199 

212 

210 

206 

211

215 

207 

204 

215 

225

210 

250 

191 

210 

212

210 

212 

214 

228 

197

Lab

142 

145 

146 

149 

151

154 

158 

180 

190 

191

196 

203 

204 

208 

212

215 

217 

220 

221 

224

230 

234 

236 

241 

246

247 

253 

256 

257 

259

263 

264 

265 

266 

268

283 

284 

286 

287 

292

294 

297

Rating

4 

4 

1 

2 

4

3 

2 

3 

4 

4

2 

3 

0 

4 

3

2 

4 

3 

4 

3

4 

4 

4 

3 

3

0 

3 

3 

2 

3

4 

4 

4 

4 

3

2 

0 

3 

0 

3

3 

0

MPV = 

F-pseudosigma = 

N = 

Hu = 

Hl =

Z-value 0 4

0.49 

-0.25 

1.72 224 

1.23 

0.00

0.61 

1.13 

0.74 

0.00 

0.23

-1.10 

0.77 

-19.07 

-0.12 

-0.86

1.23 

-0.49 

0.61 

-0.15 

0.91

0.37 

0.49 

0.37 

0.74 

-0.61

-2.82 

-0.61 

0.56 215 

1.35 

0.74

-0.25 

-0.12 

0.25 212 

0.49 

0.61

-1.35 

-25.63 < 5 

-0.74 

-5.52 

-0.66

0.74 

-13.10

210 

8 

91 

215 

204

7 22mtb

214 

208

220 

210

215 

219 

216 

210 

212

201 

216 

55 

209 

203

206 

217

213 

214 

213 

216 

205

187

221 

216

215

199 

204 

205

216 

103

50 51

220

215 

209

205

208 

209

214

165

93
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)~Continued

SpCond (Specific Conductance) juS/cm

 O 41

41. Direct reading

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab

1

3

5

8

10

11

12

13

15

16

18

19

23

24

25

26

32

33

38

39

40

42

43

46

48

51

57

59

64

68

70

84

85

88

87

89

96

97

100

102

105

107

118

119

127

134

136

138

140

141.1

Rating

4

4

3

0

4

3

0

4

3

4

0

4

0

4

4

4

1

0

3

1

4

4

4

4

3

4

2

4

4

0

0

4

4

2

0

4

4

4

4

3

3

3

4

4

4

4

0

3

3

3

Z-value

0.19

0.14

0.70

-2.19

0.37

-0.56

-12.05

0.47

0.51

-0.24

-2.70

0.23

-8.88

0.23

-0.28

0.33

-1.81

-2.47

0.53

-2.00

-0.14

-0.05

0.00

0.14

0.65

0.00

-1.07

0.28

0.33

-39.24

-3.35

-0.33

0.09

1.49

-20.42

-0.28

0.19

-0.14

0.00

0.98

-0.88

-0.51

0.33

0.23

0.42

-0.13

-4.00

-0.88

0.56

0.79

93

9

954

853

21

41

857

856

868

806

861

841

594

863

864

848

795

858

662

858

847

860

814

800

884

810

850

852

853

856

867

853

830

859

880

9

781

846

855

885

414

847

857

850

853

874

834

842

860

858

862

850

767

834

865

870

F-pseudosigma =

Hu = 

Hl =

853

21

93

863

834

Lab Rating Z-value

142

145 

146 

149 

151

154 

158 

180 

190 

198

203 

204 

212 

215 

217

218 

224 

234 

236

241

243 

244 

246 

247 

253

255 

256 

257 

259 

263

264 

266 

267 

269 

270

273 

283 

284 

286 

287

292 

294 

297

4 

4 

0 

0 

3

3 

3 

0 

4 

4

3 

4 

2 

1 

0

0 

3 

3 

4 

0

4 

4 

0 

2 

4

0 

0 

4 

3 

4

4 

3 

4 

4 

0

2 

3 

4 

4 

0

4 

4 

2

0.42 

-0.28 

-5.02 

3.95 

-0.84

0.74 

0.56 

-2.60 

0.19 

-0.35

0.60 

-0.42 

-1.02 

1.67 

-2.47

-39.28 

-0.80 

0.56 

0.37 

-7.58

-0.23 

-0.05 

-2.47 

1.16 

-0.14

4.70 

2.37 

-0.09 

0.98 

0.47

-0.19 

0.70 

0.33 

0.19 

3.12

1.02 

0.93 

0.05 

-0.42 

-3.72

0.00 

-0.14 

-1.07

862 

847 

745 

938 

835

869 

865 

797 

857 

845

866 

844 

831 

889 

800

9 

840 

865 

861 

690

848 

852 

800 

878 

850

954 

904 

851 

874 

883

849 

868 

860 

857 

920

875 

873 

854 

844 

773

853 

850 

830

94
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

Sr (Strontium) jig/L

4 A 5

0. Other 4. ICP

1. AA: direct air 5. DCP

3. AA: graphite furnxe 6. ICP/MS

N= 1 1 1

Minimum = 1001 692 550

Maximum =

Median =

F-pseudosigma =

Lab Rating Z-value 0 1 3

1 3 -0.71

3 4 0.19

5 3 0.71

8 4 -0.26

1 1 3 -0.94

16 1 -1.65

18 1 -1.72

24 4 0.34

25 1 1.99

30.1 4 0.30

32 2 -1.24

33 2 1.27

39 2 -1.16

40 2 -1.35

68 3 -0.86

70 4 0.49

85 3 0.71 692

86 3 0.64

97 0 -4.61 550

100 4 0.45

102 3 0.64

105 4 -0.04

121 3 -0.56

127 3 -0.64

134 4 0.08

136 0 -19.28

138 4 0.07

142 4 0.30

145 4 0.04

147 2 -1.39

154 0 -2.77

191 4 -0.22

212 2 -1.24

217 0 -25.20

218 0 3.63

234 4 -0.49

235 4 0.26

236 3 -0.67

246 4 0.30

247 4 0.22

254 4 0.26

256 4 -0.15

259 4 -0.49

265 4 0.15

268 1 1 .76

273 3 -0.97

283 2 1.24

284 0 12.29 1001

37

1

770

672

25

4

678

692

666

648

629

627

682

726

642

637

650

686

690

685

690

672

658

656

675

158

675

681

674

599

640

1

770

660

680

655

681

680

669

660

677

647

706

1 7

707 636

720

667

24

5 6

654

681

640

707

636

667

679

720

MPV =

F-pseudosigma =

N =

Hu =

Hl =

673

27

48

684

648

95
Table 15. Statistical summary of reported data for standard reference sample M-144 (major constituents)-Continued

V (Vanadium)

10.00 

9.00 

8.00 

7.00 - 

6.00 - 

5.00 - 

4.00 -- 

3.00 

2.00 

1.00 + 

0.00

-X-22

0. Other 6. ICP/MS 

3. AA: graphite furnace 22. Colorimetric

4. ICP

N= 1

Minimum = 250.00

Maximum =

Median =

F-pseudosigma =

1 12

9.74 1.23

15.00

2.70

4.27

8

1.00

8.00

2.25

3.47

1

3.30

MPV = insufficient data 

N= 23

Lab Rating Z-value 22

1

3 

5 

8 

13

15 

16 

18 

25 

26

30.1 

32 

42 

46 

48

57 

68 

70 

89 

100

102 

105 

127 

134 

136

138

141.1 

142 

145 

146

147 

154 

158 

180 

212

215 

217 

220 

234 

235

236 

246 

247 

256 

265

268 

283

284

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR

3.30 

2.00 

<4 

< 10 

<50

<0.01 

4.90 

<5 

<4 

<6

2.20

<2 

2.80 

1.00

< 100

<50 

9.74

2.00 

<20

<3

2.60

1.23 

< 10 

7.16 

8.00 

<0.01

1.10 

7.70 

2.60 

<4.67

15.00 

<0.01 

9.90 

2.18 

2.29

3.00

8.00 

<3 

1.60

<20 

250.00

96
Table 16. Statistical summary of reported data for standard reference sample N-55 (nutrient constituents)

Definition of analytical methods, abbreviations, and symbols_____________________________

Analytical methods

0. Other/Not reported

4. ICP

5. DCP 

7. 1C

20. Titrate: color

21. Titrate: electro

22. Color

40. Ion electrode

inductively coupled plasma

direct coupled plasma

ion chromatography

titration: colorimetric (color reagent specified)

titration: electrmetric

colorimetric (color reagent specified)

ion selective electrode

Abbreviations and symbols

N = number of analyses (excluding less than values)

MPV = most probable value

F-pseudosigma = nonparametric statistic deviation

Hu = upper hinge value

HI = lower hinge value

mg/L = milligrams per liter

Lab = laboratory code number

NR = not rated, less than value reported or insufficient data

< = less than

Constituent 

NH3 as N 

NH3+Org N as N 

N03+N02 as N 

Total P as P 

PO4 as P

Ammonia as nitrogen

Ammonia plus organic nitrogen as nitrogen

Nitrate plus nitrite as nitrogen

Total Phosphorus as phosphorus

Orthophosphate as phosphorus

page

98

99

100

101

102

97
Table 16. Statistical summary of reported data for standard reference sample N-55 (Nutrient constituents)-Continued

NH3 asN (Ammonia) mg/L

0.30

0.25

0.20

0.15

X-22 22n 0 22nitro JR 

0. Other 

22. Colorimetric 

22n. Color: Nesslerization 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab Rating Z-value

1 2 -1.08 

5 3 0.51 

9 3 -0.92 

10 4 0.02 

11 4 0.43

12 1 -1.61 

13 4 0.02 

16 0 -3.66 

19 1 -1.61 

21 4 -0.35

23 0 8.44 

25 2 -1.21 

33 4 -0.39 

38 4 0.43 

39 0 -2.27

46 3 -0.92 

48 0 -3.66 

51 4 0.02 

57 4 -0.39 

59 4 0.43

70 4 0.22 

76 4 -0.22 

86 2 1 .04 

87 4 0.02 

88 0 -2.76

89 4 0.43 

90 4 0.10 

91 4 -0.39 

96 3 -0.67 

97 4 0.35

102 4 0.14 

105 3 -0.80 

107 4 -0.43 

110 3 -0.66 

113 4 -0.14

114 3 -0.80 

118 2 1.25 

127 3 -1.00 

134 3 0.63 

138 4 0.02

140 0 2.47 

141 1 1.57 

142 1 2.02 

143 0 -2.80 

145 3 0.84

146 4 0.06 

158 0 -2.92 

180 3 -0.55 

185 3 1.00 

190 4 0.39

22nitro. Color: nitroprusside 

22p. Color: phenate 

40. Ion selective electrode 

2 7 1 2 46 11 

0.243 0.150 0.130 0.225 0.150 0.220 

0.260 0.300 0.243 0.446 0.400 

0.230 0.238 0.240 

0.030 0.024 0.032

0 22 22N 22nitro 22p 40

0.213 

0.252 

0.217 

0.240 

0.250

0.200 

0.240 

0.150 

0.200 

0.231

0.446 

0.210 

0.230 

0.250 

0.184

0.217 

0.150 

0.240 

0.230 

0.250

0.245 

0.234 

0.285 

0.240 

0.172

0.250 

0.242 

0.230 

0.223 

0.248

0.243 

0.220 

0.229 

0.223 

0.236

0.220 

0.270 

0.215 

0.255 

0.240

0.300 

0.278 

0.289 

0.171 

0.260

0.241 

0.168 

0.226 

0.264 

0.249

Lab

200 

203 

204 

205 

209

212 

213 

215 

221 

224

227 

234 

241 

243 

248

253 

284 

285 

290 

294

Rating

3 

3 

4 

0 

4

0 

NR 

3 

0 

3

0 

2

4 

4 

0

3 

4 

2 

4 

0

MPV = 

F-pseudosigma = 

N = 

Hu = 

Hl =

Z-value 0 22

0.84 0.260 

-0.63 

-0.02 

4.15 

0.14 0.243

4.93 

<1 

-0.80 

2.72 

0.59

-4.48 

1.37 

-0.27 

-0.39 

6.56

-0.59 

-0.31 

1.45 

-0.39 0.230 

5.33

0.240 

0.024 

69 

0.255 

0.222

22N 22nitro 22p 40

0.224 

0.239 

0.341

0.360

0.220 

0.306 

0.254

0.130 

0.273 

0.233 

0.230 

0.400

0.225 

0.232 

0.275

0.370

98
Table 16. Statistical summary of reported data for standard reference sample N-55 (Nutrient constituents)-Continued 

NH3 + Organic N as N (Ammonia + organic Nitrogen as nitrogen) mg/L

o X 22

Lab Rating Z-value 22 22n 22nitro

22n 0 22nitro

0. Other 

22. Colorimetric

22n. Color: Nesslerization

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

22nitro. Color: nitroprusside 

22p. Color: phenate

40. Ion selective electrode

3

0.628

6.500

7

0.090

0.350

0.305

0.104

3

0.190

0.465

2

0.220

0.517

22

0.260

0.603

0.300

0.071

3

0.284

0.440

MPV = 0.300

F-pseudosigma = 0.110

N= 40

Hu = 0.423

HI = 0.274

40

1

g

10

11

12

16 

21 

25 

38 

46

48 

51 

57 

59 

70

87 

89 

90 

96 

97

102 

105 

113 

118 

127

134 

138 

140 

141 

142

145 

146 

180 

190 

204

212 

213 

215 

221 

224

227 

241 

253 

284 

285

4 

4 

4 

2 

NR

4 

4 

3 

3 

NR

2

4 

0 

4 

4

1 

3 

4 

2 

4

3 

NR

0 

4 

4

4 

4 

4 

2 

4

4 

4 

4 

0 

4

NR 

NR 

NR

0 

4

3 

2

1 

0 

4

-0.32 

0.00 

0.00 

-1.09

0.45 

0.05 

-0.81 

-0.72

1.18 

0.00 

56.13 6.500 

0.00 

-0.06

1.81 

0.72 

0.02 

1.05 

0.27

-0.72

2.74 

0.00 

-0.33

-0.17 

0.09 

0.36 

1.49 

0.06

-0.36 

-0.30 

-0.06 

2.46 

-0.14

< 1

2.97 0.628 

0.24

-1.00 

1.27 

1.96 

12.86 1.720 

-0.14

0.265 

0.300 

0.300 

0.180 

<0.3

0.350 

0.305 

0.210 

0.220 

<0.2

0.430 

0.300

0.300 

0.293

0.500 

0.380 

0.302 

0.416 

0.330

0.220 

< 1 

0.603 

0.300 

0.264

0.281 

0.310 

0.340 

0.465 

0.307

0.260 

0.267 

0.293 

0.572 

0.284

<0.5 

<0.5 

0.327

0.190 

0.440 

0.517

0.284

290 -1.90 0.090

99
Table 16. Statistical summary of reported data for standard reference sample N-55 (Nutrient constituents)-Continued 

N03 + N02 asN (Nitrate + Nitrite as Nitrogen) mg/L

0.540

0.490 --

0.440

0.390 --

0.340

7 X 22 X 22cd -22h 22sulf

0. Other 

7. Ion chromatography 

22. Colorimetric 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

5 

9 

10 

11

12 

13 

16 

19 

21

23 

25 

38 

39 

42

45 

46 

48 

51 

53

57 

59 

69 

70 

84

86 

87 

88 

89 

90

91 

96 

97 

102 

105

107 

113 

114 

118 

127

134 

138 

140 

141 

142

143 

145 

146 

158 

180

Rating

3 

3 

4 

4 

3

1 

4 

0 

3 

0

3 

3 

4 

4 

1

3 

4 

0 

3 

0

3 

4 

4 

0 

0

1 

1 

0 

4 

3

0 

2 

3 

3 

4

4 

3 

4 

3 

1

4 

4 

3 

0 

3

4 

3 

3 

4 

4

Z-value

0.63 

-0.60 

0.42 

0.21 

-0.69

-1.89 

0.21 

-2.73 

0.51 

5.64

0.84 

-0.54 

0.24 

0.00 

1.56

0.69 

-0.36 

3.51 

-0.69 

-3.84

-0.69 

-0.39 

0.21 

-3.39 

3.21

-1.89 

2.01 

4.68 

0.21 

0.84

-2.49 

-1.05 

0.51 

-0.99 

-0.39

-0.33 

-0.69 

-0.39 

-0.99 

1.62

-0.15 

-0.39 

-0.90 

-3.57 

0.66

-0.09 

0.51 

0.72 

-0.06 

0.06

22cd. Cd diazotization 

22h. Color: hydrazine diazotization 

22sulf. Color: sulfanilamide 

3 15 8 43 4 2 

0.189 0.204 0.352 0.100 0.410 0.420 

0.315 1.054 0.572 1.280 0.631 0.466 

0.448 0.445 0.441 

0.052 0.054 0.030

0 7 22 22cd 22h 22sulf

0.464 

0.423 

0.457 

0.450 

0.420

0.380 

0.450 

0.352 

0.460 

0.631

0.471 

0.425 

0.451 

0.443 

0.495

0.466 

0.431 

0.560 

0.420 

0.315

0.420 

0.430 

0.450 

0.330 

0.550

0.380 

0.510 

0.599 

0.450 

0.471

0.360 

0.408 

0.460 

0.410 

0.430

0.432 

0.420 

0.430 

0.410 

0.497

0.438 

0.430 

0.413 

0.324 

0.465

0.440 

0.460 

0.467 

0.441 

0.445

MPV= 0.443

F-pseudosigma = 0.033

N= 75

Hu = 0.465

HI = 0.420

Lab Rating Z-value 22 22cd 22h 22sulf

185 

190 

191 

200 

203

204 

205 

208 

209 

212

215 

221 

224 

227 

234

241 

243 

248 

253 

284

285 

290 

291 

292 

294

4 

4 

3 

0 

3

4 

4 

4 

0 

1

4 

3 

4 

0 

4

4 

4 

0 

1 

0

0 

0 

0 

4 

1

-0.15 

-0.21 

-0.69 

-4.29 

0.69

0.27 

0.45 

0.06 

-7.16 

2.01

-0.39 

0.99 

0.30 

18.32 

-0.33

0.45 

0.21 

-7.61 

-1.86 

25.09

3.87 

7.40 

-10.28 

-0.39 

-1.89

0.420 

0.300

0.445 

0.204

0.476 

0.453 

1.054 

0.432

0.458

0.189 

0.381

0.572 

0.430

0.438 

0.436

0.466

0.452 

0.458

0.510

0.430

0.450 

1.280

0.690 

0.100

0.380

100
Table 16. Statistical summary of reported data for standard reference sample N-55 (Nutrient constituents)-Continued 

total P as P (total Phosphorus as phosphorus) mg/L

0.700

0.650 --

0.600

0.550

0.500

Lab Rating Z-value 22 22m

-X-22 X 22m

4. ICP

22. Colorimetric

22m. Colorphosphomolybdate 

N= 1

Minimum = 0.619

Maximum =

Median =

F-pseudosigma =

8

0.520

0.718

0.595

0.079

52

0.195

0.760

0.604

0.032

MPV = 0.602

F-pseudosigma = 0.032

N= 61

Hu = 0.630

HI = 0.587

1 

g

10

11

12

13 

16 

19 

21 

22

23 

38 

39 

46 

48

51 

57 

59 

70 

86

87 

89 

91 

96 

97

102 

105 

107 

113 

118

127 

134 

138 

140 

141

142 

143 

145 

146 

158

180 

185 

190 

203 

204

212 

213 

215 

221 

224

2

4 

4 

3 

2

3 

3 

4 

4 

4

3 

2

4 

4 

3

4 

1 

4 

4 

0

3 

4 

4 

2 

4

4 

0 

3 

4 

0

4 

2 

3

1 

4

4 

4 

2 

3 

3

3 

0 

4 

2 

4

2

4 

1 

4 

4

-1.41 

0.25 

0.00 

0.88 

-1.32

0.56 

0.97 

-0.38 

0.19 

-0.35

0.56 

1.07 

0.00 

-0.06 

0.88

-0.22 

-1.63 

-0.06 

0.16 

4.96

1.00 

-0.06 

0.25 

-1.25 

-0.38

0.19 

-2.57 

-0.66 

-0.28 

4.96

0.31 

-1.07 

0.56 

-1.95 

-0.38

-0.47 

-0.47 

1.19 

0.88 

-0.56

0.94 

2.35 

-0.50 

-1.07 

0.35

-1.32 

-0.06 

1.82 

-0.41 

0.09

0.557 

0.610 

0.602 

0.630 

0.560

0.620 

0.633 

0.590 

0.608 

0.591

0.620 

0.636 

0.602 

0.600 

0.630

0.595 

0.550 

0.600 

0.607 

0.760

0.634 

0.600 

0.610 

0.562 

0.590

0.608 

0.520 

0.581 

0.593 

0.760

0.612 

0.568 

0.620 

0.540 

0.590

0.587 

0.587 

0.640 

0.630 

0.584

0.632 

0.677 

0.586 

0.568 

0.613

0.560 

0.600 

0.660 

0.589 

0.605

Lab Rating Z-value 22 22m

227 

234 

241 

243 

248

284 

285 

287 

290 

292

3 

3 

4 

3 

2

0 

0 

0 

3 

0

0.53 0.619 

0.88 

-0.16 

-1.00 

1.25

3.64 

3.36 

-12.77 

0.88 

4.64

0.630 

0.597 

0.570 

0.642

0.718 

0.709 

0.195 

0.630 

0.750

294 -0.69 0.580

101
Table 16. Statistical summary of reported data for standard reference sample N-55 (Nutrient constituents)-Continued 

P04 as P (Orthophosphate as phosphorus) mg/L

0.650

0.600

0.550

0.500

*

X**xx

***

*** ****

rXXX*

*

X

7 -X-22 -*-22m

0. Other 22m. Color: phosphomolybdate 

7. Ion chromatography

22. Colorimetric

N= 1

Minimum = 0.570

Maximum =

Median =

F-pseudosigma =

6

0.564

0.716

7

0.300

0.600

0.574

0.009

52

0.500

1.730

0.580

0.026

Lab Rating Z-value 22 22m

1

5 

9 

10 

11

12 

13 

16 

19

21

23 

25 

38 

39 

46

48 

51 

53 

57 

59

84 

86 

87 

88 

89

96 

97 

102 

105 

107

113 

118 

127 

134 

138

140 

141 

142 

143 

145

146 

158 

180 

185 

190

191 

200 

203 

204 

208

4 

2 

3 

3

1

3 

2 

4 

4 

4

1 

4 

4 

2 

3

3 

2 

4 

0 

4

0 

3 

4 

2 

4

4 

3 

3 

4 

4

3 

4 

4 

4 

4

3 

4 

2 

2 

1

2 

3 

4 

0 

4

3 

4 

3 

4 

4

-0.23 

1.22 

-0.65 

-0.57 

-1.52

-0.76 

1.48 

-0.23 

-0.38 

0.00

1.90 

0.00 

-0.30 

-1.33 

0.76

0.76 

-1.29 

0.27 

-3.04 

-0.38

5.17 

-0.76 

-0.04 

1.10 

0.38

-0.34 

-0.53 

0.84 

0.00 

0.00

-0.72 

0.38 

0.11 

0.46 

-0.38

0.76 

0.38 

1.14 

-1.10 

-1.90

-1.37 

-0.99 

-0.19 

3.57 

-0.27

0.76 

-0.38 

-0.91 

0.34 

0.30

0.574 

0.612 

0.563 

0.565 

0.540

0.560 

0.619 

0.574 

0.570 

0.580

0.630 

0.580 

0.572 

0.545 

0.600

0.600 

0.546 

0.587 

0.500 

0.570

0.716 

0.560 

0.579 

0.609 

0.590

0.571 

0.566 

0.602 

0.580 

0.580

0.561 

0.590 

0.583 

0.592 

0.570

0.600 

0.590 

0.610 

0.551 

0.530

0.544 

0.554 

0.575 

0.674 

0.573

0.600 

0.570 

0.556 

0.589 

0.588

MPV = 0.580

F-pseudosigma = 0.026

N= 66

Hu = 0.600

HI = 0.565

Lab Rating Z-value 22 22m

212

213

215

221

224

227

234

241

248

253

284

285

287

290

292

294

0.38 

-0.38 

2.28 

-10.64 

1.37

0.00 

0.76 

-0.61 

0.61 

0.38

0.08 

-0.04 

43.70 

1.52 

0.53

-1.14

0.570

0.300

0.590

0.640

0.616

0.600

0.564

0.580

0.596

0.590

0.579

0.582

1.730

0.620

0.594

0.550

102
Table 17. Statistical summary of reported data for standard reference sample N-56 (nutrient constituents)

Definition of analytical methods, abbreviations, and symbols____________________________________

Analytical methods

0. Other/Not reported

4. ICP

5. DCP 

7. 1C

20. Titrate: color

21. Titrate: electro

22. Color:

40. Ion electrode

inductively coupled plasma

direct coupled plasma

ion chromatography

tit ration: colorimetric (color reagent specified)

titration: electrometric

colorimetric (color reagent specified)

ion selective electrode

Abbreviations and symbols

N = number of analyses-(excluding less than values)

MPV = most probable value

F-pseudosigma = nonparametric statistic deviation

Hu = upper hinge value

HI = lower hinge value

mg/L = milligrams per liter

Lab = laboratory code number

NR = not rated, less than value reported or insufficient data

< = less than

Constituent 

NH3 as N 

NH3+Org N as N 

NO3+NO2 as N 

Total P as P 

PCX, as P

Ammonia as nitrogen

Ammonia plus organic nitrogen as nitrogen

Nitrate plus nitrite as nitrogen

Total Phosphorus as phosphorus

Orthophosphate as phosphorus

page

104

105

106

107

108

103
Table 17. Statistical summary of reported data for standard reference sample N-56 (Nutrient constituents)-Continued

NH3 asN (Ammonia as Nitrogen) mg/L

0.600

0.550 -

0.500

0.450

0.400

**

^ ^R1

f

x- - - 7

;

0 X 22

0. Other 22nitro. Color: nitroprusside 

22. Colorimetric 22p. Color: phenate 

22n. Color: Nesslerization 40. Ion selective electrode

N= 1

Minimum = 0.501

Maximum =

Median =

F-pseudosigma =

9

0.398

0.990

0.520

0.079

2

0.250

0.500

2

0.441

0.500

46

0.344

0.745

0.497

0.026

8

0.440

0.543

0.490

0.040

Lab Rating Z-value 22 22n 22nitro 22p 40

1

3 

5 

9 

10

11 

12 

13 

16 

19

23 

25 

33 

38 

39

46 

48 

59 

70 

76

84 

86 

87 

88 

89

90 

91 

96 

97 

102

105 

107 

113 

118 

127

134 

138 

140 

142 

143

145 

146 

158 

180 

185

190 

203 

204 

205 

209

3 

0 

0 

1 

4

3 

4 

4 

0 

4

4 

0 

4 

0 

0

4 

0 

4 

4 

4

2 

4 

3 

0 

3

4 

3 

3 

3 

4

4 

4 

3

1 

1

4 

3 

3 

2 

4

2 

4 

0 

4 

4

4 

3 

3 

2 

4

-0.95 

2.71 0.590 

-2.13 

-1.57 

-0.22

0.66 

0.07 

0.37 

-2.92 0.398 

0.07

0.07 

10.04 0.840 

0.07 

3.18 

-4.50

-0.48 

-4.33 

0.07 

-0.25 

0.31

-1.39 

-0.01 

-0.81 

-2.07 

0.66

-0.25 

-0.51 

0.54 

0.87 0.527 

0.07

0.37 0.510 

-0.22 

-0.54 

1.54 

-1.60

0.48 

-0.51 

0.66 0.520 

1.25 

-0.43

1.25 

0.01 

-2.36 

-0.28 

-0.40 0.484

0.44 

-0.92 

0.66 

1.04 

0.10 0.501

0.465

0.425 

0.444 

0.490

0.520 

0.500 

0.510

0.500

0.500

0.500 

0.606 

0.344

0.481 

0.350 

0.500 

0.489 

0.508

0.450 

0.497 

0.470 

0.427 

0.520

0.489 

0.480 

0.516

0.500

0.490 

0.479 

0.550 

0.443

0.514 

0.480

0.540 

0.483

0.540 

0.498 

0.417 

0.488

0.513 

0.466 

0.520 

0.533

-22nitro X 22p ^ 40

MPV = 0.498

F-pseudosigma = 0.034

N= 68

Hu= 0.516

HI = 0.470

Lab Rating Z-value____0 22 22n 22nitro 22p 40

212 

213 

215 

217 

221

224 

227 

234 

241 

243

253 

284 

285 

289 

290

292 

294 

297 

302

0 

NR 

3 

4

1

4 

0 

4 

2 

3

1 

4 

1 

4 

3

3 

0 

0 

4

14.44

-0.81 

0.07 

-1.54

0.31 

-7.26 

-0.10 

1.33 

-0.51

-1.66 

0.31 

-1.69 

-0.31 

-0.81

-0.51 

6.82 

7.26 

0.07

0.990

0.470 

0.500

0.508 

0.250

0.480

0.441

0.487 

0.470

0.730 

0.745 

0.500

0.445

0.494 

0.543

0.508 

0.440

0.480

104
Table 17. Statistical summary of reported data for standard reference sample N-56 (Nutrient constituents)-Continued 

NH3 + Organic N as N (Ammonia + organic Nitrogen as nitrogen) mg/L

0 X 22

0. Other 

22. Colorimetric

22n. Color: Nesslerization

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

22nitro. Color: nitroprusside 

22p. Color: phenate

40. Ion selective electrode

2

0.994

3.680

10

0.500

1.560

0.740

0.176

2

0.350

0.720

3

0.650

1.332

25

0.440

1.241

0.756

0.093

2

0.579

0.700

Lab Rating Z-value 22 22n 22nitro 22p 40

1 

3 

9 

10 

11

12 

16 

23 

25 

38

46 

48 

59

70 

87

89 

90 

96 

97 

102

105 

113 

118 

127 

134

138 

140 

142 

145 

146

180 

190 

204 

212 

213

215 

217 

221 

224 

227

241 

253 

284 

285 

289

290 

297

3 

0 

4 

4 

3

1 

4 

3 

0 

4

1 

4 

3 

4 

4

4 

3 

4 

4 

2

NR 

0 

2 

3 

4

3 

4 

3 

3 

2

4 

1 

4 

0 

NR

0 

0 

0 

4 

0

3 

0 

0 

1 

4

0 

1

-0.94 

3.62 

0.31 

0.00 

0.52

-1.55 

0.00 

-0.62 

8.37 

-0.31

-1.96 

-0.10 

0.52 

0.07 

0.21

0.31 

-0.58 

-0.24 

-0.41 

-1.03

2.45 

1.14 

0.64 

0.33

0.72 

-0.21 

0.78 

-0.83 

-1.04

0.04 

1.70 

-0.38 

2.07

-2.58 

-3.20 

2.52 

0.24 

-4.13

-0.52 

6.02 

30.29 

-1.77 

-0.21

-2.58 

1.83

1.100 

0.800

0.750 

1.560

0.710

< 1

0.730

0.713 

0.950 

< 1

0.994

3.680 

0.730

0.500

0.659

0.780 

0.750

0.600 

0.690 

0.720

0.560 

0.740 

0.800 

0.757 

0.770

0.780 

0.694 

0.727

0.650

0.987 

0.860 

0.812 

0.782

0.820

0.825 

0.670 

0.649

0.754 

0.914

<0.5 

0.440

0.773 

0.350

0.700 

1.332

0.579

0.927

-22nitro )£ 22p + 40

MPV = 0.750

F-pseudosigma = 0.097

N= 44

Hu = 0.823

HI = 0.692

105
Table 17. Statistical summary of reported data for standard reference sample N-56 (Nutrient constituents)~Continued 

N03 + N02 asN (Nitrate + Nitrite as Nitrogen) mg/L

7 -X-22 -X-22cd 22h 22sulf

0. Other 

7. Ion chromatography 

22. Colorimetric 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

3 

5 

9 

10

11 

12 

13 

16 

19

23 

25 

30 

38 

39

42 

45 

46 

48 

53

59 

69 

70 

84 

86

87 

88 

89 

90 

91

96 

97 

102 

105 

107

113 

114 

118 

127 

134

138 

140 

142 

143 

145

146 

158 

180 

185 

190

Rating

4 

0 

4 

3 

4

4 

4 

3 

2 

3

3 

3 

4 

3 

4

0 

3 

4 

2

0

3 

4 

2

0 

0

2 

0 

3 

4 

2

4 

4 

3 

3 

3

4 

0 

4 

4 

0

4 

1 

3 

4 

0

4 

4 

3 

4 

4

Z-value

-0.31 

-2.93 

-0.27 

0.96 

0.20

-0.42 

0.20 

-0.67 

-1.04 

0.52

0.67 

0.83 

-0.22 

0.61 

-0.22

-3.56 

0.69 

0.50 

1.15 

2.68

-0.58 

0.20 

-1.21 

2.32 

-3.56

1.46 

3.47 

0.67 

0.14 

-1.21

0.05 

0.36 

-0.74 

-0.74 

-0.71

-0.17 

17.46 

-0.42 

0.00 

-2.62

0.20 

-1.90 

0.55 

0.28 

-2.78

0.31 

-0.05 

-0.61 

-0.03 

-0.17

22cd. Cd diazotization 

22h. Color hydrazine diazotization 

22sulf. Color: sulfanilamide 

1 17 9 43 3 3 

0.918 0.480 0.560 0.520 0.720 0.663 

3.280 0.812 2.640 0.820 0.720 

0.740 0.747 0.755 

0.168 0.075 0.063

0 7 22 22cd 22h 22sulf

0.727 

0.560 

0.730 

0.808 

0.760

0.720 

0.760 

0.704 

0.681 

0.780

0.790 

0.800 

0.733 

0.786 

0.733

0.520 

0.791 

0.779 

0.820 

0.918

0.710 

0.760 

0.670 

0.895 

0.520

0.840 

0.968 

0.790 

0.756 

0.670

0.750 

0.770 

0.700 

0.700 

0.702

0.736 

1.860 

0.720 

0.747 

0.580

0.760 

0.626 

0.782 

0.765 

0.570

0.767 

0.744 

0.708 

0.745 

0.736

MPV= 0.747

F-pseudosigma = 0.064

N= 76

Hu = 0.790

HI = 0.704

Lab Rating Z-value 22 22cd 22h 22sulf

191 

196 

203 

204 

205

208 

209 

212 

215 

217

221 

224 

227 

234 

241

243 

253 

284 

285 

289

290 

291 

292 

294 

297

3 

3 

2 

4 

3

4 

0 

2 

4 

3

3 

0 

0 

4 

0

3 

4 

0 

2 

4

0 

0 

2 

2 

0

-0.58 

-0.78 

-1.32 

0.28 

-0.66

0.20 

-4.19 

1.46 

-0.42 

-0.58

0.58 

3.53 

4.25 

-0.31 

7.58

-0.74 

0.00 

12.13 

1.02 

-0.42

5.22 

-2.31 

-1.05 

-1.21 

29.69

0.710 

0.697

0.760 

0.480

0.784 

0.972 

1.018 

0.727 

1.230

0.747 

0.812

0.680

0.663 

0.765 

0.705

0.840 

0.720 

0.710

0.700 

1.520 

0.720

1.080 

0.600

0.670 

2.640

302 39.73 3.280

106
Table 17. Statistical summary of reported data for standard reference sample N-56 (Nutrient constituents)-Continued 

total P as P (total Phosphorus as phosphorus) mg/L

0.810 

0.760 

0.710 

0.660 

0.610

2

- ^ 7

X**

^_X ---- --"* «- « »« » M* Mf-5lt-)Kvlv^

/ VJIt^"

I

4. ICP 

22. Colorimetric 

2m. Color:phosphomolybdate 

N= 1 9 

Minimum = 0.795 0.610 

Maximum = 0.807 

Median = 0.747 

F-pseudosigma = 0.039

Lab Rating Z-value 4 22

1 3 -0.77 

32 1.29 0.760 

9 4 -0.06 

10 3 0.86 

11 4 0.43

12 1 -1.58 

13 4 0.14 

16 3 0.98 0.749 

19 4 -0.14 

22 4 -0.03

23 3 -1.00 

38 4 0.40 

39 3 -0.72 

46 3 0.95 

48 0 2.15

59 4 -0.43 

70 4 0.32 

86 0 9.62 

87 1 1.72 

89 4 0.43

91 4 0.43 

96 2 -1.18 

97 4 0.14 0.720 

102 3 -0.80 

105 0 -3.01 0.610

107 4 0.03 

113 4 -0.09 

118 0 7.61 

127 4 -0.26 

134 4 -0.37

138 2 1.29 

140 4 -0.43 0.700 

142 4 -0.46 

143 4 -0.06 

145 1 1.87

146 4 0.26 

158 4 -0.43 

180 1 -1.64 

185 0 2.32 

190 4 -0.43

203 4 -0.49 

204 4 0.20 

212 3 -0.72 

213 3 0.72 

215 4 -0.43

217 4 -0.14 

221 3 0.92 0.747 

224 4 -0.43 

227 0 2.30 0.795 

234 2 1.29

B^ma^X^* ******"*

^^ ^K ^^ ^^^ *^ *** ^* *"* * * ^*

 0-4 X-22 -X-22m

MPV =

F-pseudosigma = 

50 N = 

0.023 Hu = 

1.050 Hl = 

0.713 

0.031

22m Lab Rating Z-value 4 22

0.688 241 4 -0.09 

243 2 -1.29 

0.713 284 1 1.58 0.770 

0.745 285 0 2.64 0.807 

0.730 287 0 -19.86

0.660 289 4 -0.20 0.708 

0.720 290 3 0.72 

292 0 0.00 

0.710 294 3 0.72 

0.714 297 0 -6.49

0.680 

0.729 

0.690 

0.748 

0.790

0.700 

0.726 

1.050 

0.775 

0.730

0.730 

0.674

0.687

0.716 

0.712 

0.980 

0.706 

0.702

0.760

0.699 

0.713 

0.780

0.724 

0.700 

0.658 

0.796 

0.700

0.698 

0.722 

0.690 

0.740 

0.700

0.710 

0.700 

0.760

A

J^**

^^^^

?i^^"

0.715 

0.035 

60 

0.747 

0.700

22m

0.712 

0.670

0.023

0.740 

0.860 

0.740 

0.489

107
Table 17. Statistical summary of reported data for standard reference sample N-56 (Nutrient constituents)-Continued 

P04 as P (Orthophosphate as phosphorus) mg/L

0.750

0.700

0.650 -

0.600 --_

0.550

7 -X-22 -X-22m

7. Ion chromatography 

22. Colorimetric

22m. Color:phosphomolybdate 

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

10

0.377

1.850

0.665

0.135

7

0.650

0.670

0.660

0.005

52

0.030

2.100

0.657

0.030

Lab Rating Z-value 22 22m

MPV = 0.658

F-pseudosigma = 0.030

N= 69

Hu = 0.681

HI = 0.640

1

3 

5 

9 

10

11 

12 

13 

16 

19

23 

25 

30 

38 

39

46 

48 

53 

59 

70

84 

86 

87 

88 

89

96 

97 

102 

105 

107

113 

114 

118 

127 

134

138 

140 

142 

143 

145

146 

158 

180 

185 

190

191 

196 

203 

204 

208

3 

4 

4 

4 

3

0 

2 

0 

4 

4

4 

0 

0 

4 

4

0 

4 

2 

4 

4

0 

3 

2 

0 

4

4 

4 

3 

4 

4

4 

1 

0 

3 

4

3 

4 

0 

4 

1

2

3 

0 

0 

4

3 

4 

3 

3 

2

-0.92 

0.07 

-0.07 

-0.49 

-0.56

-3.22 

-1.25 

-9.25 

0.03 

-0.26

-0.26 

11.48 

10.63 

0.00 

-0.26

-5.20 

0.07 

1.05 

0.07 

-0.03

4.51 

-0.59 

1.05 

3.55 

0.39

-0.39 

0.16 

-0.53 

-0.26 

-0.46

-0.30 

2.04 

-3.22 

0.79 

0.26

-0.59 

-0.26 

2.11 

-0.49 

-1.58

-1.38 

-0.89 

2.83 

4.21 

0.00

-0.92 

-0.36 

-0.99 

0.56 

1.05

0.630 

0.660 

0.656 

0.643 

0.641

0.560 

0.620 

0.377 

0.659 

0.650

0.650 

1.007 

0.981 

0.658 

0.650

0.500 

0.660 

0.690 

0.660 

0.657

0.795 

0.640 

0.690 

0.766 

0.670

0.646 

0.663 

0.642 

0.650 

0.644

0.649 

0.720 

0.560 

0.682 

0.666

0.640 

0.650 

0.722 

0.643 

0.610

0.616 

0.631 

0.744 

0.786 

0.658

0.630 

0.647 

0.628 

0.675 

0.690

Lab Rating Z-value 22 22m

212

213

215

217

221

224

227

234

241

253

284

285

287

289

290

292 3

294 4

297 0

302 0

0.72 

0.72 

-0.59 

0.39 

0.07

0.680

0.680

0.640

0.670

0.660

1.45

1.05

-8.06

-1.48 

0.13

0.413

0.613

0.702

0.690

0.662

1.38 

0.39 

-20.66 

0.49 

-4.54

0.670

0.700

0.030

0.673

0.520

0.89

0.39

47.45

39.22 1.850

0.685

0.670

2.100

108
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)

Definition of analytical methods, abbreviations, and symbols

Analytical methods

0 Other/Not reported

1 AA: direct, air =

2 AA: direct, N2O

3 AA: graphite furnace =

4 ICP

5 DCP

6 ICP/MS

7 1C

12 Flame emission =

20 Titrate: color =

21 Titrate: electro =

22 Color:

40 Ion electrode =

41 Electro

50 Gravimetric =

51 Turbidimetric =

Abbreviations and symbols

N =

MPV =

F-pseudosigma =

Hu =

HI =

mg/L =

US/cm =

Lab =

NR =

* =

Constituent

Acid Acidity as CaCO3

Ca Calcium

Cl Chloride

F Fluoride

K Potassium

Mg Magnesium

Na Sodium

PH

PO4 as P Orthophosphate as Phosphorus

SO4 Sulfate

Sp Cond Specific Conductance

atomic absorption: direct, air

atomic absorption: direct, nitrous oxide

atomic absorption: graphite furnace

inductively coupled plasma

direct current plasma

inductively coupled plasma / mass spectrometry

ion chromatography

flame emission

titration: colorimetric (color reagent specified)

titration: electrometric

colorimetric (color reagent specified)

ion selective electrode

electrometric: (type meter specified)

gravimetric: (precipitate specified)

turbidimetric: (precipitate specified)

number of analyses (excluding less than values)

most probable value

nonparametric statistic deviation

upper hinge value

lower hinge value

milligrams per liter

microsiemens per centimeter at 25° C

laboratory code number

not rated, less than value reported or insufficient data

less than

page

110

111

112

113

114

115

116

117

118

119

120

109
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)~Continued

Acidity (asCaC03) mg/L

20. Titrate: colorimetric

21 . Titrate: electrometric

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

3

2.50

8.00

14

1.10

16.40

6.00

3.63

MPV =

F-pseudosigma =

N =

Hu =

Hl =

5.70

3.85

17

8.00

2.80

Lab Rating Z-value 20

3 

5 

8 

25 

38

39 

42 

59 

89 

119

136 

141 

146 

215 

228

237 

246 

247 

283 

297

NR 

3 

4 

NR 

3

3 

0 

4 

3 

3

4 

2 

NR 

3 

4

4 

3 

3 

3 

3

0.71 

0.08

0.64

-0.92 

2.78 

-0.18 

-0.67 

0.60

-0.08 

-1.19

-0.83 

0.18

0.21 

0.60 

-0.55 

-0.61 

-0.96

8.44 

6.00 

<8 

8.18

2.16 

16.40 

5.00 

3.10 

8.00

5.40 

1.10

2.50 

6.39

6.50 

8.00 

3.60 

3.33 

2.00

110
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)-Continued

Ca (Calcium) mg/L

0. Other 

1. AA: direct air 

2. AA: direct nitrous oxide 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

2 

3 

5 

8

23 

25 

26 

33 

38

39 

46 

48 

59 

64

83 

86 

89 

100 

105

107 

110 

119 

134 

138

140 

141 

145 

146 

180

190 

196 

203 

204 

209

215 

220 

221 

228 

237

241 

246 

247 

255 

283

284 

287 

297

Rating

4 

4 

3 

4 

4

0 

4 

0 

4 

4

4 

4 

0 

3 

3

4 

4 

2 

3 

0

2 

3 

2 

4 

4

4 

2 

4 

3 

2

0 

0 

0 

3 

0

4 

1 

4 

0 

3

4 

3 

3 

4 

4

2 

0 

3

Z-value

-0.21 

0.24 

0.83 

0.21 

0.00

19.58 

-0.35 

4.70 

-0.21 

-0.07

0.48 

-0.28 

31.13 

-0.97 

0.97

-0.07 

-0.14 

-1.25 

0.69 

2.08

-1.04 

0.62 

1.11 

0.23 

0.14

-0.48 

-1.11 

-0.21 

-0.83 

1.31

-3.04 

-6.70 

-2.49 

-0.76 

3.60

-0.28 

-1.82 

0.07 

5.12 

0.62

0.07 

-0.62 

1.00 

0.35 

0.35

-1.31 

4.57 

-0.97

4. ICP 

5. DCP 

7. Ion chromatography 

2 14 1 25 

1.65 0.87 1.83 1.58 

6.34 4.67 2.36 

1.77 1.84 

0.18 0.08

0 1

4.67

6.34 

1.70 

1.98

1.66 

2.14

1.69 

1.93

1.77

0.87 

1.48 

1.73

1.85

1.85

1.65 

2.50

2 4

1.81

1.96 

1.87 

1.84

1.79 

1.83

1.91 

1.80

1.83 

1.82

1.94

2.00 

1.87 

1.86

1.68 

1.81 

1.72 

2.03

2.36

1.80 

1.58

1.75 

1.98 

1.89 

1.89

1.70

1 5 

1.81 1.40 

2.58

5 7

1.87

2.52 

1.81

1.40

2.58 

1.93

MPV'

F-pseudosigma :

N:

HIT 

Hh

1.84

0.14

48

1.94

1.74

111
Table 18. Statistical'summary of'reported'data for'standard'reference sample P-29'(lowionic strength constituents)~Continued

Cl (Chloride) mg/L

21 ag X 22

0. Other 20. Titrate: colorimetric 

2. AA: direct nitrous oxide 20hg: Titrate: mercury

7. Ion chromatography

N= 1

Minimum = 1.11

Maximum =

Median =

F-pseudosigma =

22. Colorimetric

1 25

1.00 0.00

1.70

0.16

0.06

3

0.20

6.00

0

<0.6

<2

5

0.20

1.00

MPV = 

F-pseudoskjma =

Hu = 

Hl =

0.20

0.18

35

0.38

0.14

Lab Rating Z-value 20 21ag 22

1 

2 

3 

5 

8

23 

25 

26 

30.1 

33

39 

42 

46 

48 

59

64 

89 

96 

100 

105

107 

110 

119 

134 

138

140 

141 

145 

146 

158

180 

190 

196 

203 

204

209 

215 

220 

221 

224

228 

237 

241 

246 

247

283 

284 

294 

297

4 

4 

1 

0 

4

4 

NR 

4 

4 

4

4 

NR 

4 

0 

0

4 

3 

NR 

NR 

NR

NR 

4 

NR 

4 

NR

4 

4 

NR 

NR 

0

2 

4 

4 

NR 

NR

4 

0 

4 

0 

4

3 

4 

4 

NR 

0

1 

NR 

4 

NR

-0.30 

-0.24 

1.81 

5.03 1.11 

0.06

-0.22

-0.37 

-0.28 

-0.39

0.00

0.00 

4.42 

8.29

-0.22 

0.61

0.03 

-1.11 

-0.04

0.44 

-0.41

3.30

1.02 

-0.44 

0.43

<1

-0.17 

32.07 

0.11 

4.42 

0.13

-0.61 

-0.33 

-0.43

5.78

2.05 

<5 

-0.39

0.15 

0.16

0.21

0.16 

<1 

0.13 

0.15 

0.13

0.20 

<0.5

1.70

0.16 

0.31

<4 

<0.5

<0.6 

0.21 

0.00 

0.19 

<0.2

0.13 

<0.5

0.80

0.38 

0.12 

0.28 

<2

0.17 

6.00

1.00 

0.22

0.09 

0.14 

0.12 

<1.5 

1.24

0.57 

0.13

0.53

0.20 

1.00

<2

0.28

<1

0.22

<1

112
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)-Continued

F (Fluoride) mg/L

0.120 

0.100 

0.080 

0.060 

0.040 

0.020 

0.000

4

: - / x^

: J .^ ' '

_^^^ A A ^^^ +^* _^_ A ^^^ .......................

 - 0 -

0. Other 

7. Ion chromatography 

0. Ion selective electrode 

N= 1 13 15 

Minimum = 0.180 0.000 0.039 

Maximum = 0.220 0.140 

Median = 0.041 0.065 

F-pseudosigma = 0.023 0.026

Lab

1 

2 

3 

8 

23

25 

33 

39 

42 

48

59 

83 

89 

100 

105

107 

110 

119 

134 

138

140 

141 

145 

146 

158

180 

190 

196 

215 

241

246 

247 

255 

283 

284

287 

294

Rating Z-value 0 7 40

3 0.62 0.073 

3 -0.86 0.032 

NR <0.1 

3 -0.57 0.040 

3 -0.57 0.040

1 1.59 0.100 

3 -0.93 0.030 

4 0.33 0.065 

4 -0.14 0.052 

3 0.51 0.070

0 2.31 0.120 

NR <0.1 

4 -0.21 0.050 

3 0.69 0.075 

NR <0.2

3 -0.57 0.040 

4 -0.21 0.050 

3 -0.57 0.040 

4 0.15 0.060 

NR <0.1

3 -0.60 0.039 

4 -0.50 0.042 

NR < 0.2 

NR < 0.2 

3 0.65 0.074

NR < 0.05 

NR -2.01 0.000 

2 -1.32 0.019 

4 0.14 0.060 

0 3.03 0.140

NR <0.5 

4 0.43 0.068 

3 0.87 0.080 

0 5.91 0.220 

0 4.47 0.180

2 1.23 0.090 

4 -0.21 0.050

^ 7 40

MPV= 0.056 

F-pseudosigma = 0.028 

N= 29 

Hu = 0.078 

HI = 0.040

113
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)-Continued

K (Potassium) mg/L

0.50

0.25

0. Other 

1. AA: direct air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5 

7

DCP 

Ion chromatography

12. Flame emission

2

0.41

0.46

17

0.10

0.40

0.37

0.03

9

0.00

0.80

0.31

0.10

1 5

0.36 0.34

0.42

1

0.32

F-pseudosigma =

0.37

0.04

35

0.39

0.33

Lab Rating Z-value

1

2 

3 

5 

8

23 

25 

26 

33 

38

48 

59 

64 

83 

89

100 

105 

107 

110 

119

134 

138 

140 

141 

145

146 

180 

190 

196 

203

204 

209 

215 

221 

228

237 

241 

246 

247 

255

283 

284 

287 

297

4 

4 

2 

NR 

NR

3 

NR 

4 

4 

4

1 

3 

4 

4 

3

NR 

NR 

4 

4 

NR

4 

4 

3 

4

0

NR 

NR 

3 

4 

4

2 

2 

NR 

4 

4

2 

0 

NR

0 

0

0 

3 

4 

2

0.00 

-0.40 

-1.35

-0.90

-0.07 

-0.22 

0.22

2.02 

0.54 

0.00 

0.45 

-0.67

0.45 

0.00 

-8.32

0.47 

0.00 

0.76 

-0.45 

-3.82

-0.67 

0.18 

0.00

-1.08 

-1.35

-0.45 

0.00

1.12 

-6.07

9.10 

9.67

-2.99 

0.93 

0.00 

-1.19

0.37 

0.35 

0.31

0.33

0.37 

0.36 

0.38

0.46 

0.39 

0.37 

0.39 

0.34

<0.5 

0.39 

0.37 

0.00

0.39 

0.37 

0.40 

0.35 

0.20

<.422 

0.34 

0.38 

0.37

0.32 

0.31

0.35 

0.37

0.42 

0.10 

<0.5 

0.73 

0.80

0.24 

0.41 

0.37 

0.32

114
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)-Continued

Mg (Magnesium) mg/L

0.65

0. Other 

1. AA: direct air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5. DCP 

6. ICP/MS

7. Ion chromatography

1 14

0.49 0.54

0.58

0.56

0.01

26

0.52

1.00

0.57

0.03

1 1 5

0.57 0.85 0.46

0.69

Lab Rating Z-value

MPV = 

F-pseudosigma =

Hl =

0.57

0.02

48

0.59

0.56

1

2 

3 

5 

8

23 

25 

26 

33 

38

39 

46 

48 

59 

64

83 

86 

89 

100 

105

107 

110 

119 

134 

138

140 

141 

145 

146 

180

190 

196 

203 

204 

209

215 

220 

221 

228 

237

241 

246 

247 

255 

283

284 

287 

297

3 

3 

4 

4 

4

4 

4 

0 

4 

2

4 

3 

0 

4 

4

4 

3 

4 

0

1

3 

4 

0 

4 

4

4 

1 

4 

2 

3

0 

4 

2 

3 

0

3 

2

4 

0

1

4 

4 

3

1 

0

0 

2 

2

0.81 

0.68 

0.40 

-0.40 

0.00

-0.40 

-0.20 

4.83 

0.00 

-1.25

0.08 

-0.60 

11.28 

0.12 

0.00

-0.32 

-0.97 

-0.40 

4.11 

2.01

-0.81 

0.40 

17.32 

0.13 

-0.40

0.00 

-2.01 

-0.40 

-1.05 

0.60

-4.43 

0.48 

-1.21 

-0.60 

7.65

-0.81 

1.47 

-0.08 

4.03 

1.61

-0.40 

0.10 

0.60 

1.53 

2.70

-3.10 

-1.21 

-1.01

0.56 

0.54

0.57 

0.57

0.56

0.55 

0.58

0.57

0.58 

0.54 

0.56

0.57

0.56

0.49 

0.54

0.59

0.58 

0.56 

0.57

0.57 

0.57

0.57 

0.56

0.56 

0.55

0.67 

0.62

1.00 

0.57 

0.56

0.52 

0.56 

0.54 

0.59

0.76

0.55 

0.61

0.57 

0.59 

0.61 

0.64

0.55

0.59

0.69

0.85

0.46

0.67 

0.61

115
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)-Continued

Na (Sodium) mg/L

0.85

0.75 -

0.65 --

0.55

0.45

0. Other 

1. M: direct air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5 

7

DCP 

Ion chromatography

12. Flame emission

2

0.56

0.78

14

0.56

0.72

0.65

0.06

23 1

0.59 0.66

2.00

0.68

0.06

5

0.62

0.81

1

0.64

MPV:

F-pseudosigma :

N:

HIT 

Hh

0.66

0.06

46

0.72

0.64

Lab Rating Z-value 12

1 

2 

3

5 

8

23 

25 

26 

33 

38

39 

46 

48 

59 

64

83 

86 

89 

100 

105

107 

110 

119 

134 

138

140 

141 

145 

146 

180

190 

196 

203 

204 

209

215 

220 

221 

228 

237

241 

246 

247 

255 

283

284 

297

4 

0 

4 

2 

4

4 

4 

3 

4 

3

4 

4 

1 

1 

4

4 

4 

2 

0 

2

4 

4 

0 

3 

4

3 

4 

3 

0 

2

3 

4 

2 

4 

4

2 

4 

3 

0 

2

3 

3 

0 

4

1

1 

1

0.32 

2.16 

-0.48 

1.11 

-0.16

-0.16 

0.25 

-0.56 

0.00 

-0.63

-0.24 

-0.11 

1.90 

-1.52 

-0.16

-0.16 

-0.43 

-1.27 

3.32 

1.11

0.32 

0.00 

21.27 

0.63 

0.00

0.63 

0.48 

-0.95 

-2.54 

1.41

-0.63 

-0.10 

-1.43 

-0.40 

-0.32

-1.11 

0.23 

0.95 

2.38 

1.27

0.63 

0.56 

2.83 

0.40 

1.84

-1.57 

1.83

0.65 

0.62

0.78 

0.56 

0.65

0.58

0.68 

0.66

0.70

0.70

0.65 

0.57

0.64

0.72

0.70

0.56

0.68 

0.80 

0.63 

0.73 

0.65

0.68 

0.63 

0.66

0.65 

0.65

0.65 

0.63

0.87 

0.73

2.00 

0.66

0.69 

0.60 

<0.5 

0.75

0.62 

0.64

0.59 

0.67

0.81 

0.74

0.70 

0.83 

0.69 

0.78

0.78

116
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)--Continued

PH

7.50

41 . Direct reading

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab

1

2

3

5

8

23

25

26

30.1

33

38

39

42

46

48

59

64

86

89

96

100

107

110

119

134

136

138

140

141

146

158

180

190

196

203

204

209

215

221

224

228

237

241

243

244

246

247

255

283

284

Rating

4

4

4

2

4

2

3

2

3

4

4

4

0

0

2

2

4

4

2

4

4

4

4

4

2

4

4

1

4

2

4

4

3

4

0

4

4

4

4

3

4

4

0

4

4

4

0

4

3

1

Z-value

0.00

-0.06

0.00

-1.47

0.32

1.09

0.62

-1.38

0.82

-0.32

0.44

-0.06

2.47

3.59

-1.03

-1.18

0.29

-0.09

1.24

0.00

0.24

0.24

0.01

0.12

-1.16

0.06

0.18

-1.62

-0.03

1.38

0.00

-0.06

-0.74

-0.35

-2.71

-0.03

-0.03

0.44

0.00

0.53

0.00

0.38

-2.35

-0.32

0.18

-0.09

3.71

0.44

-0.71

-1.56

52

5.93

8.07

6.85

0.21

41

6.85

6.83

6.85

6.35

6.96

7.22

7.06

6.38

7.13

6.74

7.00

6.83

7.69

8.07

6.50

6.45

6.95

6.82

7.27

6.85

6.93

6.93

6.85

6.89

6.46

6.87

6.91

6.30

6.84

7.32

6.85

6.83

6.60

6.73

5.93

6.84

6.84

7.00

6.85

7.03

6.85

6.98

6.05

6.74

6.91

6.82

8.11

7.00

6.61

6.32

MPV'

F-pseudosigma : 

Rating Criterion :

Hl =

6.85 

0.21 

0.34 **

52 

6.96 

6.67

Lab Rating Z-value

287

294

-2.65

-1.03

5.95

6.50

117
Table 18. Statistical'summary of'reported'data for standard'reference sample P-29'(lowionic strength constituents)-Continued

P04 as P (Orthophosphate as phosphorus) mg/L

^e-x-x-x-x-x^

Lab Rating Z-value 22m

7 X 22m

0. Other 22m. Color: phosphomolybdate 

4. ICP

7. Ion chromatography

N= 0 0

Minimum = <0.1 < 0.25

Maximum =

Median =

F-pseudosigma =

5

0.029

0.070

29

0.022

0.460

0.048

0.012

1 

3 

5 

8 

23

25 

33 

38 

39 

42

46 

48 

83 

89 

96

100 

105 

107 

119 

134

138 

140 

141 

146 

158

180 

190 

196 

203 

204

215 

220 

221 

224 

241

246 

283 

284 

287 

294

3 

4 

3 

0 

2

2 

4 

3 

3 

NR

3 

2 

3 

4 

4

NR

0 

4 

1 

4

0 

0 

4 

NR

0

4 

0 

2 

3 

4

2

4 

4 

4 

4

NR 

2 

NR 

NR

4

-0.55 

0.21 

-0.55 

-3.00 

-1.31

-1.48 

-0.46 

-0.63 

-0.80

-0.55 

1.39 

0.80 

0.38 

-0.46

34.95 

-0.13 

-1.98 

-0.46

34.95 

2.91 

0.38

2.07

0.38 

32.42 

-1.39 

-0.55 

0.30

-1.31 

-0.38 

0.38 

0.38 

0.13

1.22

-0.13

0.039 

0.048 

0.039 

<0.01 

0.030

0.028 

0.040 

0.038 

0.036 

<0.05

0.039 

0.062 

0.055 

0.050 

0.040

<0.5 

0.460 

0.044 

0.022 

0.040

0.460 

0.080 

0.050 

<0.05 

0.070

0.050 

0.430 

0.029 

0.039 

0.049

0.030 

0.041 

0.050 

0.050 

0.047

<0.25 

0.060

0.044

MPV = 0.046

F-pseudosigma = 0.012

N = 34

Hu = 0.055

HI = 0.039

297 10.33 0.168

118
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)-Continued

S04 (Sulfate) mg/L

7 -X-22

0. Other 

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

7. Ion chromatography 

22. Colorimetric

51

2

0.80

20.00

. Turbidimetric

1 1 31

1.18 1.09 0.50

7.44

1.10

0.13

0 3

<2 1.00

4.00

Lab Rating Z-value

-51

MPV = 

F-pseudosigma =

Hl =

1.10

0.23

38

1.33

1.02

22

1

2

3 

5 

8

23 

25 

26

30.1 

33

34 

39 

42 

46 

48

59 

64 

83 

89 

96

100 

105 

110 

119 

134

138 

140 

141 

145 

146

158 

180 

196 

203 

204

209 

220 

221 

224 

228

237 

241 

246 

247 

283

284 

287 

294 

297

4 

4 

NR

4 

4

4 

NR

4 

4 

4

NR 

4 

NR 

4 

NR

0 

4 

4 

4 

4

NR

3 

4 

0 

4

4 

NR 

3 

0 

NR

0 

4 

4 

NR 

NR

0 

0 

2 

3 

3

4 

4 

NR 

0 

0

0 

0 

3 

0

0.17 

-0.20

0.35 

0.43

0.26

-0.35 

-0.30 

-0.22

-0.43 

0.00

7.72 

-0.04 

-0.04 

0.43 

-0.43

-0.78 

0.08 

3.90 

-0.09

-0.04

-0.87 

-2.60

4.77 

0.43 

0.22

3.12 

4.90 

-1.30 0.80 

1.00 

-0.65

-0.09 

-0.43

5.13 

7.94

81.98 20.00 

12.58 

-0.78 

27.50

1.14 

1.05 

<10 

1.18 

1.20

1.16 

<5 

1.02 

1.03 

1.05

1.00 

<2.5 

1.10

2.88 

1.09 

1.09 

1.20

<7 

0.92 

1.12 

2.00 

1.08

1.09

0.90 

0.50

2.20 

1.20 

1.15 

<2.5 

<2

1.82

1.33 

0.95

1.08 

1.00 

<2.5 

2.28 

2.93

0.92 

7.44

< 1

<1

1.00

<2

<5

2.23

4.00

119
Table 18. Statistical summary of reported data for standard reference sample P-29 (low ionic strength constituents)-Continued

SpCond (Specific Conductance)

41. Direct reading

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

2 

3 

5 

8

23 

25 

26 

33 

38

39 

42 

46 

48 

59

64 

86 

89 

96 

100

105 

107 

119 

134 

136

138 

140 

141 

145 

146

180 

193 

196 

203 

204

215 

224 

228 

241 

243

244 

246 

247 

255 

283

284 

287 

297

Rating

4 

0 

2

0 

0

1 

4 

3 

2 

4

3 

0 

3 

1 

2

1 

4 

4 

4 

4

4 

3 

4 

4 

4

3 

3 

4

0 

0

4 

3 

3 

3

0

4 

4 

3 

2 

4

3 

3 

4

0 

0

0 

0 

4

Z-value

0.00 

-4.24 

-1.41 

2206.3 

-2.70

-1.99 

-0.23 

0.70 

-1.29 

0.00

0.59 

3.28 

0.94 

-1.76 

-1.17

-1.88 

0.47 

0.35 

0.23 

-0.35

-0.12 

0.70 

-0.23 

0.38 

0.00

-0.59 

0.82 

0.47 

-21.36 

5.16

-0.23 

-0.67 

0.76 

0.94 

199.18

0.35 

-0.23 

-0.65 

-1.41 

-0.23

-0.59 

0.94 

-0.23 

6.57 

2.93

7.98 

-2.30 

-0.23

47 

15.6 

1900.0 

19.2 

0.9

41

19.2 

15.6 

18.0 

1900.0 

16.9

17.5 

19.0 

19.8 

18.1 

19.2

19.7 

22.0 

20.0 

17.7 

18.2

17.6 

19.6 

19.5 

19.4 

18.9

19.1 

19.8 

19.0 

19.5 

19.2

18.7 

19.9 

19.6 

<1 

23.6

19.0 

18.6 

19.9 

20.0 

189.0

19.5 

19.0 

18.7 

18.0 

19.0

18.7 

20.0 

19.0 

24.8 

21.7

26.0 

17.2 

19.0

MPV =

F-pseudosigma =

N =

Hu =

Hl =

19.2

0.9

47

19.9

18.7

120
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)

Definition of analytical methods, abbreviations, and symbols________________ ___ __ __

Analytical methods

0. Other/Not reported

1. AA: direct, air

2. AA: direct, N2O

3. AA: graphite furnace

4. ICP

5. DCP

6. ICP/MS

7. 1C

10. AA: extraction

11. AA: hydride

12. AA: flame emission 

22. Color

atomic absorption: direct air

atomic absorption: direct, nitrous oxide

atomic absorption: graphite furnace

inductively coupled plasma

direct current plasma

inductively coupled plasma / mass spectrometry

ion chromatography

atomic absorption: extraction (chelating agent[s] specified)

atomic absorption: hydride (reducing agent specified)

atomic absorption: flame emission

colorimetric (color reagent specified)

Abbreviations and symbols

Constituent

Ag Silver

Al Aluminum

As Arsenic

B Boron

Ba Barium

Be Beryllium

Ca Calcium

Cd Cadmium

Co Cobalt

Cr Chromium

Cu Copper

Fe Iron

K Potassium

N = number of analyses-(excluding less than values)

MPV = most probable value

F-pseudosigma = nonparametric statistic deviation

Hu = upper hinge value

HI = lower hinge value

ng/L = micrograms per liter

mg/L = milligrams per liter

Lab = laboratory code number

NR = not rated, less than value reported or insufficient data

< = less than

page Constituent

122 Li Lithium

123 Mg Magnesium

124 Mn Manganese

125 Mo Molybdenum

126 Na Sodium

127 Ni Nickel

128 Pb Lead

129 Sb Antimony

130 Se Selenium

131 SiO2 Silica

132 Sr Strontium

133 V Vanadium

134 Zn Zinc

page

135

136

137

138

139

140

141

142

143

144

145

146

147

121
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Ag (Silver) |ig/L

50.0

0. Other 

1. AA: direct, air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 3

39.0 25.0

40.0

10

21.9

42.0

34.8

7.0

17

15.0

144.0

34.6

2.5

16

2.2

38.0

33.4

5.2

Lab Rating Z-value

F-pseudosigma = 

Hl =

34.1

5.2

47

36.6

29.7

1

5 

8 

11 

12

13 

16 

18 

25 

26

30.1 

32 

34 

42 

46

48 

59 

69 

85 

86

89 

100 

102 

105 

119

126 

134 

138 

140 

141

142 

146 

151 

180 

212

215 

234 

235 

236 

241

246 

247 

255 

283 

284

292 

300 

304

4

0 

0 

0 

1

4 

4 

4 

0 

1

2 

4 

3 

4 

4

2 

4 

4 

2 

4

2 

3 

0 

4 

4

3 

4 

4 

1 

4

4 

4 

3 

4

0

3 

4 

3 

3 

3

3 

4 

4 

0 

3

1 

0 

3

0.41 

-2.37 

-3.71 

-2.76 

1.53

0.39 

-0.02 

0.17 

-5.40 

-1.94

-1.24 

-0.02 

0.52 

-0.06 

-0.27

-1.24 

-0.31 

-0.33 

1.15 

0.04

1.34 

0.80 

21.33 

0.45 

0.14

-0.89 

0.18 

0.00 

-1.77 

-0.25

-0.23 

-0.27 

-0.83 

0.10 

-2.74

0.95 

0.02 

0.91 

-0.80 

-0.95

0.82 

0.25 

0.33 

-3.32 

0.95

1.53 

-6.19 

0.76

21.9 

42.0

36.8 

32.7

32.4 

40.0

41.0 

34.8

29.5 

25.0

39.0 

38.8 

29.2

39.0

15.0 

19.9

36.1

35.0 

<6 

24.1

34.3

38.2 

144.0

35.0 

32.8

32.7 

34.6

34.2 

30.0

38.3 

35.8

42.0

36.2

34.0

27.7 

34.0

33.8

27.7 

32.5

36.4

34.1

32.9 

29.8 

20.0

35.4 

17.0

2.2 

38.0

122
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Al (Aluminum) [ig/L

90.0

0. Other 

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5. DCP 

6. ICP/MS

1 6 19 1

74.0 45.1 32.0 170.0

74.1 1159.0

51.0

16.9

15

33.0

56.0

46.7

4.7

Lab Rating Z-value

MPV =

F-pseudosigma =

N =

Hu =

Hl =

50.0

14.1

42

64.0

45.0

1

5 

8 

13 

16

18 

25 

26 

32

33

42 

46 

48 

59 

69

83 

85 

89 

100 

102

105 

119 

134 

136 

138

141 

142 

145 

146 

151

180 

191 

204 

212 

215

220 

221 

234 

235 

236

241 

246 

247 

254 

255

283 

284 

287 

292

300

4 

4 

3 

4 

4

NR

0 

4 

4 

0

3 

4 

4 

3 

NR

2 

0 

1 

2 

4

4 

4 

4 

0 

4

NR 

3 

0 

NR 

2

0 

4 

4 

NR 

4

0 

3 

4 

4 

4

2 

2 

4 

4 

NR

2

1 

4 

0 

4

-0.26 

0.07 

-0.92 

-0.35 

0.43

-2.20 

-0.08 

-0.36 

8.52

-0.55 

0.10 

0.21 

-0.86

-1.21 

-2.84 

1.71 

1.42 

-0.50

-0.23 

-0.49 

-0.46 

78.74 

0.12

0.99 

6.67

-1.21

2.40 

0.00 

-0.43

0.00

3.69 

0.96 

-0.32 

-0.16 

0.07

1.04 

1.03 

0.26 

0.00

-1.28 

1.70 

-0.28 

-2.84 

-0.02

51.0 

37.0 

45.1

<100 

<19 

48.9

170.0

51.4 

<50

33.0 

<10 

74.1 

70.0 

43.0

43.5 

1159.0 

51.7

<100 

64.0 

144.0 

<200

83.8

<100 

50.0

102.0 

63.5 

45.5

51.0

64.7 

64.5

50.0 

<34

32.0 

74.0 

46.0 

<10

46.3 

56.0

45.0

42.3

53.0 

37.9

46.7 

43.1

33.0

50.0 

44.0

47.7

53.7

49.7

Lab Rating Z-value

304 -0.16 47.7

123
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

As (Arsenic) (ig/L

2.40

11na

0. Other 

3. M: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS 

11.AA: hydride NaBH4

1 7

1.00 0.26

2.00

1.20

0.33

2

19.00

45.00

12

0.80

2.88

1.50

0.67

3

1.12

1.70

F-pseudosigma =

Hu = 

Hl =

1.30

0.37

25

1.70

1.20

Lab

1 

5 

8 

13 

16

18 

25 

26 

30.1 

32

42 

48 

59 

69 

89

100 

102 

105 

119 

134

136 

138 

141 

142 

145

146 

151 

180 

191 

204

212 

215 

220 

221 

234

236 

241 

246 

247 

254

255 

283 

284 

292 

300

304

Rating

2 

3 

4 

NR 

4

4 

NR 

4 

4 

4

0 

2 

2 

NR 

NR

NR 

NR 

NR 

NR 

0

0 

NR 

1 

0 

0

NR 

3 

NR 

4 

0

NR 

NR 

4 

4 

1

NR 

NR 

NR 

NR 

NR

NR 

NR 

3 

NR 

3

3

Z-value

1.08 

0.59 

-0.27

-0.27

-0.27

-0.49 

0.00 

-0.27

3.48 

-1.35 

1.08

-2.81

117.90

1.89 

4.26 

47.75

0.54

-0.08 

4.02

-0.27 

0.00 

-1.56

-0.81 

0.70

0.54

034

1.52 

<5

1.20 

<50

<5

<2 

0.26

45.00 

2.00 

19.00

<40.1

<5 

1.20 

1.30 

0.72

<35 

<5

<65

< 110

<2

1.00 

<3

6

1.20

1.30 

1.20

2.59 

0.80 

1.70

<4

<2 

2.88

1.50

1.27 

2.79

<5

<2

<5 

1.56

1.50

11na

1.70 

1.20

1.12

<2

<2

124
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

B (Boron)

280

4. ICP

6. ICP/MS

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab

1

5

8

11

16

18

24

25

26

30.1

32

42

46

48

85

86

100

119

134

136

138

141

142

145

180

212

215

220

234

235

236

246

247

254

255

283

300

Rating

4

4

1

4

0

3

3

0

3

4

2

4

2

0

4

4

1

0

3

3

3

4

4

4

2

3

0

4

4

4

3

3

3

4

2

3

3

Z-value

0.00

0.24

-1.59

0.08

8.89

-0.56

0.71

6.82

-0.63

0.08

1.19

0.00

1.35

-2.86

-0.16

0.00

1.51

-3.33

0.67

-0.87

1.00

-0.48

-0.24

0.08

1.11

-0.95

-3.33

0.10

-0.16

0.32

-0.87

0.84

-0.56

-0.16

1.11

-0.63

-0.87

31

200

354

242

13

4

242

245

222

243

354

235

251

328

234

259

240

242

261

200

250

231

255

236

239

243

256

230

200

243

240

246

231

253

240

256

234

6

206

257

6

243

257

242

206

235

231

MPV =

F-pseudosigma =

N =

Hu =

Hl =

242

13

37

251

234

125
Table 19. Statistical'summary of'reported'data for standard'reference sample GWT-2 (ground-water trace constituents)-Continued

Ba (Barium) jug/L

185 

180 

175 

170 

165 

160 

155 

150 

145 

140

i_i

.

 ^tyvA~6~6^^^  ^

. ..V/yAA^^^0^^ AA** ^ ^^XHXHXv^^ ^^~/* *

-

s

0. Other 

1. AA: direct, air 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

5 

8 

11 

13

16 

18 

24 

25 

26

30.1 

32 

33 

42 

46

48 

59 

76 

83 

85

86 

89 

100 

102 

105

119 

121 

134 

136 

138

140 

141 

142 

145 

146

149 

151 

180 

191 

204

212 

215 

220 

234 

235

236 

241 

246 

247 

255

Rating Z-value

4 0.39 

4 0.26 

0 -2.10 

2 -1.18 

4 -0.39

3 -0.52 

3 -0.92 

3 0.65 

4 0.13 

4 -0.13

3 0.79 

2 -1.05 

0 4.58 

4 0.07 

4 0.00

1 -1.83 

3 -0.64 

4 0.48 

2 -1.05 

0 -2.36

4 0.13 

0 2.23 

2 1.31 

3 0.65 

4 0.00

4 0.39 

3 -0.65 

4 -0.08 

0 -2.75 

4 0.18

0 -2.23 

0 -3.14 

4 0.10 

4 0.39 

3 0.65

4 0.39 

3 -0.65 

4 -0.13 

0 -20.27 

2 1.44

3 -0.92 

3 -0.92 

4 0.47 

4 -0.13 

3 -0.79

2 -1.18 

0 9.56 

4 0.33 

3 0.79 

4 0.39

^ 

r

^

-0-0^0-, -.-,^4^-.-^.

4. ICP 

5. DCP MPV = 167 

6. ICP/MS F-pseudosigma = 8 

1 1 3 32 1 17 N= 55 

190 150 170 134 202 12 Hu = 170 

240 177 180 Hl= 160 

166 167 

8 6

013456 Lab Rating Z-value 013456

170 283 0 -4.32 134 

169 284 0 3.01 190 

151 292 3 -0.52 163 

158 300 1 1.70 180 

164 304 3 -0.65 162

163 

160 

172 

168 

166

173 

159 

202 

168 

167

153 

162 

171 

159 

149

168 

184 

177 

172 

167

170 

162 

166 

146 

168

150 

143 

168 

170 

172

170 

162 

166 

12 

178

160 

160 

171 

166 

161

158 

240 

170 

173 

170

126
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Be (Beryllium) jj.g/L

11.50

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 5 26

17.00 7.00 7.93

9.00 10.00

9.04

0.52

15

7.66

11.50

8.69

1.04

Lab Rating Z-value

MPV =

F-pseudosigma =

N =

Hu =

Hl =

9.00

0.82

47

9.40

8.30

1

5 

8 

11 

13

16 

18 

25 

26 

30.1

32 

42 

46 

48

59

69 

83 

85 

86 

89

100 

102 

105 

119 

134

138 

141 

142 

145 

146

151 

180 

212 

215 

220

234 

235 

236 

241 

246

247 

255 

283 

284 

292

300 

304

4 

4 

4 

4 

4

2 

4 

2 

2 

0

3 

1 

2 

2 

3

4 

4 

2 

4 

3

4 

2 

2 

4 

4

4 

2 

4 

2 

3

2 

3 

3 

4 

3

4 

2 

4 

0 

3

4 

4 

4 

0 

2

4 

4

-0.20 

0.17 

0.00 

0.37 

0.49

-1.10 

-0.12 

-1.23 

1.15 

3.07

0.86 

-1.64 

1.13 

-1.10 

-0.98

-0.21 

-0.37 

-1.23 

0.12 

-0.98

0.39 

-1.23 

1.23 

-0.10 

0.05

0.00 

-1.31 

-0.38 

1.23 

0.61

-1.23 

-0.61 

-0.74 

0.00 

0.82

0.34 

1.23 

0.00 

-2.45 

0.74

0.49 

0.05 

-0.13 

9.81 17.00 

-1.23

-0.49 

-0.25

9.14 

9.00 

9.30 

9.40

8.90 

8.00 

9.94

9.92

8.83 

8.70 

8.00 

9.10 

8.20

9.32 

8.00

8.92 

9.04

9.00 

7.93

10.00 

9.50

8.50

9.00 

9.67

9.28

9.00 

7.00 

9.60

9.04 

8.89

8.00

8.84

8.10 

11.50

9.70 

7.66

8.10 

8.20

10.00

8.69

8.00 

8.40

10.00

9.40

8.60 

8.80

127
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Ca (Calcium) mg/L

0. Other 

1. AA: direct, air

2. AA: direct, nitrous oxide

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

5. DCP

6. ICP/MS

1 14 1

77.9 67.6 69.0

87.1

71.6

2.8

40

60.0

78.5

72.7

2.1

1 6

79.4 59.0

86.9

Lab Rating Z-value

MPV = F-pseudosigma : N = Hu = Hh72.6

2.7

63

74.1

70.5

Lab Rating Z-value

1

5 

8 

11 

13

16 

18 

23 

24 

25

26 

30.1 

30.2 

32 

33

43 

46 

48 

59 

64

69 

83 

85 

86 

89

100 

102 

105 

109 

119

121 

134 

136 

138 

140

141 

142 

145 

146 

149

180 

191 

196 

204 

212

215 

220 

221 

234 

235

4 

1 

4 

3 

2

3 

2 

3 

3 

0

4 

0 

2 

1 

0

4 

4 

2 

4 

4

3 

3 

3 

4 

0

4 

2 

3 

4 

4

4 

4 

2 

4 

3

0 

3 

3 

4 

3

4 

2 

4 

2 

4

0 

3 

1 

3 

2

-0.04 

-1.87 

0.37 

0.56 

1.24

0.52 

-1.24 

0.60 

0.60 

2.21

0.00 

-5.10 

-1.35 

1.65 

2.55

-0.15 

0.22 

1.05 

-0.37 

0.41

-0.82 

-0.52 

-0.67 

0.37 

5.43

0.26 

-1.35 

-0.75 

-0.06 

0.04

0.34 

-0.50 

-1.46 

0.30 

-0.60

-4.35 

-0.67 

0.56 

-0.15 

0.52

0.07 

-1.09 

-0.39 

-1.01 

-0.22

-2.10 

-0.99 

-1.87 

0.60 

1.39

74.2

69.0

71.6

70.4 

70.8 

87.1

72.5

71.0

74.0

71.6 

69.9

67.6

72.5 

67.6 

73.6 

74.1 

75.9

74.0 

69.3

74.2 

78.5

72.6 

59.0

77.0 

79.4

72.2 

73.2 

75.4

73.7

71.2 

73.6

73.3 

69.0 

70.6

72.7

73.5 

71.3 

68.7 

73.4

61.0 

70.8 

74.1 

72.2

72.8 

69.7

72.0

67.0 

70.0

74.2 

76.3

236 3 -0.90 70.2 

241 0 2.85 80.2 

246 4 -0.15 72.2 

247 4 0.22 73.2 

254 4 -0.41 71.5

255 4 0.26 73.3 

283 0 -4.72 60.0 

284 1 1.99 77.9 

287 3 -0.97 70.0 

292 3 0.75 74.6

297 4 0.26 73.3 

300 0 5.36 86.9 

304 2 1.09 75.5

128
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Cd (Cadmium)

15.5

0. Other 

1. M: direct, air

3. M: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 1 17

10.0 13.0 11.8

22.0

13.4

0.7

20

11.5

17.0

12.7

1.5

18

12.2

15.0

13.1

0.6

Lab Rating Z-value

MPV'

F-pseudosigma : N;

HIT

Hh

13.0

0.8

57

13.6

12.5

1

5 

8 

11 

12

13 

16 

18 

24 

25

26 

30.1 

32 

34 

42

46 

48 

59 

69 

83

86 

89 

100 

102 

105

119 

126 

134 

136 

138

140 

141 

142 

145 

146

149 

151 

180 

191 

204

212 

215 

220 

221 

234

235 

236 

241 

246 

247

4 

2 

4 

4 

4

3 

4 

2 

4 

0

3 

0 

2 

3 

4

3 

4 

4 

2 

2

4 

0 

0 

2 

3

4 

1 

3 

1 

4

4 

4 

4 

0 

4

0 

4 

0 

3 

3

4 

2 

0 

3 

3

4 

2 

4 

3 

3

-0.49 

-1.47 

0.00 

-0.37 

-0.25

-0.86 

0.12 

-1.23 

-0.49 

-8.75

0.61 

2.45 

1.23 

0.74 

0.12

0.74 

-0.37 

0.00 

-1.47 

-1.10

-0.37 

2.70 

3.92 

-1.23 

-0.61

0.49 

1.84 

-0.74 

-1.84 

-0.49

0.00 

-0.25 

0.45 

2.45 

0.12

2.45 

0.12 

4.91 

-0.98 

-0.98

0.00 

-1.23 

4.17 

-0.61 

0.86

-0.49 

-1.23 

0.00 

-0.61 

0.61

11.8 

12.8

13.5 

13.6

13.6 

11.8

15.2

13.4 

14.5

13.0 

12.8

15.0

12.5 

13.7

12.6 

13.0

13.0 

12.7

12.3

12.0 

12.6 

<6

12.1

12.7

16.2 

12.0

12.4 

11.5

15.0 

13.1

17.0

12.0 

16.4

12.0 

12.5

12.6

13.1

15.0 

14.0

13.1

12.7 

13.0

12.5

12.6

13.4

13.1

12.2 

12.2

13.0

13.5

Lab Rating Z-value 

0 2^5"

0

254

255

283

284

287

-0.25 

0.00

-3.68 10.0 

11.04

15.0

12.8

13.0

22.0

292

300 3

304 4

13.0

0-86 

0.37

13.7

13.3

129
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Co (Cobalt)

10.00 q9.00 \- 

8.00 ' -- 

7.00 ' -- 

6.00 : 

5.00 \- 

4.00 \- 

3.00 '-.- 

2.00 ^ 

1.00 i0.00 '-- ^ * * * » » -+-

0 3

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

<100 3 5

0.41 1.25

1.00 43.20

11

0.40

1.00

0.45

0.13

Lab Rating Z-value

1 

5 

8 

13 

16

18 

25 

26 

30.1 

32

42 

48 

85 

89 

100

102 

105 

119 

134 

136

138 

141 

142 

145 

146

180 

191 

212 

215 

221

234 

235 

236 

246

247

254 

255 

283 

284 

300

304

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR

<1 

<3 

<10 

<5

<5 

<12 

<6

<10 

<5 

1.25

10.00

0.41 

10.70

<10

7.00 

<10

<5.22

<5 

1.00

0.50

<6

<10

<5 

43.20

< 100

1.00

0.50 

0.40

<2

0.40

<1 

0.41

0.67 

<1

0.45 

<1

0.40 

<1

0.52 

0.63

0.43

MPV= Insufficient data 

N= 19

130
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Cr (Chromium)

0. Other 

1. M: direct, air

3. M: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 1 12

31.0 33.0 3.2

34.0

29.4

2.6

26

23.0

48.0

27.3

3.0

17

23.9

36.6

26.9

2.6

Lab Rating Z-value

F-pseudosigma =

Hu = 

Hl =

27.6

3.0

57

30.0

26.0

1

5 

8 

13 

16

18 

24 

25 

26 

30.1

32 

34 

42 

46 

48

59 

69 

76 

83 

85

86 

89 

100 

102 

105

119 

134 

136 

138 

140

141 

142 

145 

146 

149

151 

180 

191 

204 

212

215 

220 

221 

234 

235

236 

241 

246 

247 

254

4 

4 

1 

2 

3

4 

3 

3 

3 

4

4 

4 

2 

4 

2

4 

4 

3 

3 

3

3 

3 

3 

1 

4

4 

4

1 

4 

1

2 

4 

0 

4 

0

2 

4 

3 

2

3

4 

0 

2 

3 

3

3 

0 

3 

4 

3

-0.11 

-0.21 

-1.56 

1.04 

-0.98

-0.21 

0.84 

0.80 

0.74 

0.47

-0.24 

-0.48 

-1.19 

0.33 

-1.25

-0.31 

-0.04 

0.66 

-0.65 

0.80

-0.82 

0.90 

-0.51 

-1.56 

0.03

-0.45 

-0.25 

1.85 

0.00 

1.81

-1.32 

-0.03 

3.16 

0.36 

2.15

-1.19 

-0.48 

-0.75 

-1.05 

-0.88

0.47 

6.87 

1.01 

0.84 

-0.55

-0.55 

-8.24 

0.77 

0.20 

0.80

29.8

26.2 

28.6

27.5

30.3

26.3 

33.0

34.0

29.0

30.6 

30.1

3.2

27.0 

23.0 

30.7

27.0 

30.1 

30.0

25.7 

30.0

25.2

26.1 

23.0

26.9 

33.1 

27.6

23.7

37.0 

28.7

26.2

48.0 

26.0

26.0 

29.9 

30.0

27.3 

24.7

29.0

26.9 

24.1 

23.9

26.7 

29.6

27.7

27.5

24.1

25.4 

24.5 

25.0

28.2

Lab Rating Z-value

255

283

284

287

292

1.07 

0.67

1.14 31.0 

2.15 

-0.21

34.0

30.8

29.6

27.0

300

304

3.03

0.80

36.6

30.0

131
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Cu (Copper) |ig/L

34.0

32.0 

30 0

28.0

24.0

22.0 

20.0

$

D O

/

D. Other 

. AA: direct, air 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab Rating Z-value

1 4 -0.41 

5 4 0.41 

82 1.35 

11 3 0.90 

12 4 -0.15

13 0 -3.15 

16 4 0.22 

18 3 -0.52 

23 4 -0.49 

24 4 0.49

25 4 -0.15 

26 4 -0.30 

30.1 4 0.22 

32 3 -0.82 

42 2 -1.46

46 4 0.00 

48 1 -1.87 

59 2 -1.27 

69 NR 

76 4 0.34

83 4 0.00 

85 0 2.47 

86 3 0.60 

89 4 -0.49 

100 4 -0.19

102 2 -1.27 

105 3 -0.90 

119 3 0.60 

126 1 1.72 

134 3 0.59

136 0 4.80 

138 4 -0.07 

140 3 0.60 

141 2 -1.09 

142 4 0.04

145 0 5.10 

146 2 1.35 

149 3 0.60 

151 2 -1.42 

180 3 -0.86

191 1 -1.95 

204 2 -1.46 

212 1 -1.65 

215 1 1.72 

220 0 3.71

221 4 0.41 

234 3 -0.67 

235 3 -0.67 

236 4 -0.15 

241 0 3.22

/

--/--

_____.^

- - - /-

 70 

4. ICP 

6. ICP/MS

1 5 9 

33.0 30.0 22.0 

39.0 37.0 

28.0 

1.8

0 1 3

28.0

27.1

28.4 

<50

35.0 

27.1

33.0

30.0

30.0

33.0

29.5 

26.6 

37.0

__ 6&00*

vA^^°^

-D-OH>-1-

27 17 

20.0 23.2 

42.0 29.3 

28.8 26.2 

2.0 2.7

4 6

27.3 

29.5 

32.0 

30.8

20.0 

29.0 

27.0

29.7

28.0 

27.6 

29.0 

26.2 

24.5

23.4 

25.0

29.3

28.4 

30.0 

27.9

25.0 

26.0 

30.0

30.0

41.2 

28.2

25.5 

28.5

42.0 

32.0

24.6 

26.1

23.2 

24.5 

24.0

38.3

26.6 

28.0

^> / """"""

po&^xr ***** ^*+**^

+***+^

« 3 ^ 4 * 6

MPV = 28.4 

F-pseudosigma = 2.7 

N= 59 

Hu = 30.0 

HI = 26.4

Lab Rating Z-value 01346

246 4 0.00 28.4 

247 4 0.00 28.4 

254 3 0.60 30.0 

255 4 0.15 28.8 

283 0 -2.25 22.4

284 1 1.72 33.0 

287 0 3.97 39.0 

292 0 -2.40 22.0 

300 3 -0.52 27.0 

304 4 -0.30 27.6

132
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Fe (Iron) mg/L

0.070

0.060

0.050

0.040

0.030

0. Other 4. ICP 

1. AA: direct, air 5. DCP

3. AA: graphite furnace 6. ICP/MS

N= 1

Minimum = 0.002

Maximum =

Median =

F-pseudosigma =

6

0.043

0.063

3

0.049

0.062

36

0.004

0.068

0.048

0.004

1 6

0.060 0.025

0.309

Lab Rating Z-value

MPV = 0.049

F-pseudosigma = 0.005

N= 53

Hu = 0.054

Hl= 0.047

1

5 

8

13 

16

18 

23 

24 

25 

. 26

30.1 

30.2 

33 

43 

46

48 

59 

69 

83 

85

86 

89

100 

102 

105

109 

119 

121 

126 

134

136 

138 

140 

141 

142

145 

146 

151 

180 

191

204 

212 

215 

220 

221

234 

236 

241 

246 

247

4 

4 

0 

0 

4

NR 

3 

4 

1 

4

0 

NR 

1 

4 

3

3 

4 

2 

3 

4

4 

4 

0 

4 

4

2 

4 

3 

NR 

3

4 

4 

2 

0 

3

3 

3 

0 

0 

1

0 

NR 

3 

3 

0

4 

4 

4 

0 

1

-0.43 

0.11 

-2.59 

-6.71 

-0.18

0.92 

0.37 

-1.66 

-0.37

46.38

2.03 

0.18 

-0.55

-0.92 

-0.18 

1.48 

-0.55 

0.18

-0.43 

-0.04 

2.59 

-0.18 

-0.18

1.48 

0.18 

0.74

-0.61

-0.13 

-0.28 

-1.11 

3.53 

-0.92

-0.55 

0.52 

-4.44 

-8.30 

2.03

30.20

0.92 

0.55 

2.40

-0.13 

-0.37 

0.18 

2.85 

1.66

0.047 

0.050 

0.035 

0.013 

0.048

<50 

0.054 

0.051 

0.040 

0.047

<0.5

0.050 

0.046

0.057 

0.046 

0.050

0.047 

0.049 

0.063 

0.048 

0.048

0.057 

0.050 

0.053 

<0.05 

0.046

0.048 

0.048 

0.043 

0.068 

0.044

0.046 

0.052

0.004

<0.02 

<0.1 

0.054 

0.052 

0.062

0.048 

0.047 

0.050 

0.064 

0.058

0.300 

0.060

0.044 

0.048

0.025 

0.060

Lab Rating Z-value

254

255

283

284

287

292

297

300

4

4

4

0

0

4

1

0

0.00

0.50

-0.37

-8.69 0.002

2.59 0.063

0.18

1.85

48.05

0.049

0.052

0.047

0.050

0.059

0.309

133
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

K (Potassium) mg/L

5.30 

5.10 

4.90 

4.70 

4.50 

4.30 

4.10 

3.90 

3.70 

3.50

(

4

--

'--

-- £

'..--- TfQson 

 -J^- JX

JDOO"

f J- -?

exrV^**^^ +*+ A*

.TO***** S^ .^^K'.... .............................

<<X>^

T

__ _ _, _«_4 ^_.^7 ^_12

3. Other 

. AA: direct, air 

1. ICP 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

5 

8 

11 

13

16 

18 

23 

24 

25

26 

32 

33 

43 

46

48 

59 

64 

69 

83

85 

86 

89 

100 

102

105 

109 

119 

134 

138

140 

141 

142 

145 

146

149 

180 

191 

196 

204

212 

215 

220 

221 

234

236 

241 

246 

247 

254

Rating

3 

4 

4 

1 

3

4 

3 

3 

2 

0

4 

4 

4 

3 

3

3 

2 

2 

2 

2

4 

4 

3 

3 

2

2 

2 

0 

4 

2

3 

0 

4 

4

1

4 

3 

4 

3 

4

NR 

0 

0 

3 

4

4 

0 

3 

3 

3

Z-value

-0.56 

0.22 

0.37 

-1.57 

0.60

0.00 

0.75 

-0.56 

-1.24 

4.68

0.22 

0.37 

0.22 

-0.75 

0.75

0.52 

1.50 

1.05 

1.35 

-1.05

0.41 

-0.45 

-0.82 

0.52 

-1.50

-1.01 

1.05 

-2.25 

-0.47 

-1.12

-0.90 

-2.59 

-0.22 

-0.26 

1.69

-0.37 

-0.56 

0.11 

-0.75 

0.41

-7.49 

4.12 

0.94 

-0.19

0.22 

2.62 

0.60 

0.60 

-0.75

6. ICP/MS 

7. Ion chromatography MPV= 4.60 

12. Flame emission F-pseudosigma = 0.27 

3 17 29 5 1 2 N= 57 

4.66 4.32 2.60 4.50 4.66 4.71 Hu = 4.76 

4.85 7.00 5.85 5.18 4.96 HI = 4.40 

4.50 4.53 

0.36 0.36

0 1

4.45

4.60 

4.45

4.66

5.00 

4.88

4.32

4.71 

4.38

4.88 

4.48

4.36

4.50 

4.40

4.85

5.30 

4.40

4 6 7 12 Lab Rating Z-value 0 1 4 6 7 12

255 4 -0.30 4.52 

4.66 283 1 -1.99 4.07 

4.70 284 3 0.93 4.85 

4.18 287 0 8.99 7.00 

4.76 292 4 -0.37 4.50

297 0 -2.17 4.02 

4.80 300 0 2.17 5.18 

304 4 -0.37 4.50 

4.27 

5.85

4.66 

4.70

4.40 

4.80

4.74 

4.96

4.48

4.74 

4.20

4.33 

4.00 

4.30

3.91 

4.54 

4.53 

5.05

4.45 

4.63

4.71

<5 

2.60 

5.70

4.55

4.66

4.76 

4.76

134
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Li (Lithium)

1. AA: direct, air 

4. ICP

6. ICP/MS

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

0 14

<50 15.0

30.4

19.8

2.0

5

16.2

20.4

MPV

F-pseudoskjma

N

Hu

Hl

19.2

1.6

19

20.2

18.0

Lab Rating Z-value

1

5

8

24

25

26

30.1

32

69

100

105

134

142

145

151

234

236

246

247

254

283

300

3 

3

NR 

0 

2

4

4

3 

NR

4

NR 

0 

4 

0 

1

0.98 

-0.67

6.87

1.10

20.8 

18.1 

<20 

30.4 

21.0

0.31

-0.12

-0.74

0.49

<50

-2.33 

0.37 

3.56

-1.84

0.00

-2.58

-0.55 

0.74 

0.49

-0.74

-1.72

19.7

20.0

19.0

18.0

<50 

15.4 

19.8 

25.0

16.2

19.2

15.0

18.3

20.0

20.4

18.0

16.4

135
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Mg (Magnesium) mg/L

15.0

0. Other 5. 

1. AA: direct, air 6.

4. ICP

N= 1

Minimum = 15.1

Maximum =

Median =

F-pseudosigma =

DCP 

ICP/MS

16

13.2

15.0

14.2

0.2

40

12.0

15.0

14.1

0.3

1 6

14.4 13.0

16.2

Lab Rating Z-value

MPV'

F-pseudosigma = N =

Hi]'

HI'

14.2

0.3

64

14.4

14.0

1

5 

8 

11 

13

16 

18 

23 

24 

25

26 

30.1 

30.2 

32 

33

43 

46 

48 

59 

64

69 

76 

83 

85 

86

89 

100 

102 

105 

109

119 

121 

134 

136 

138

140 

141 

142 

145 

146

149 

180 

191 

196 

204

212 

215 

220 

221 

234

4 

4 

4 

4 

3

4 

0 

0 

3 

1

3 

0 

0 

0 

3

3 

4 

0 

4 

1

4 

4 

2 

2 

1

3 

1 

0 

1 

3

3 

3 

4 

0 

4

4 

0 

1 

1 

4

3 

4 

3 

3 

3

4 

0 

1 

4 

2

-0.34 

0.00 

0.00 

0.00 

-0.67

0.34 

-4.38 

-3.37 

0.67 

1.69

0.67 

-4.05 

2.70 

4.05 

0.67

-0.67 

0.00 

3.04 

-0.34 

-2.02

0.00 

0.24 

-1.01 

-1.01 

1.69

0.67 

2.02 

2.70 

-1.69 

-0.67

-0.67 

-0.67 

0.23 

-4.05 

-0.40

0.00 

-7.42 

2.02 

1.92 

-0.34

-0.67 

-0.34 

-0.54 

-0.51 

-0.67

0.00 

-2.70 

-1.99 

0.34 

-1.01

13.2

15.0

14.1

14.2 

14.3

13.9

14.4 

14.0

14.2

14.0

14.1 

14.0

14.3

14.1 

14.2 

14.2 

14.2 

14.0

14.3 

12.9

14.4 

14.7

14.4 

14.4

14.0 

14.2

13.6

13.9 

14.7

14.8 

15.0 

13.7

14.0 

14.0 

14.3 

13.0 

14.1

12.0 

14.8 

14.8 

14.1

14.1

14.2 

13.4 

13.6

13.9

13.0 

15.4

15.1

14.0

Lab Rating Z-value

235

236

241

246

247

292 2

297 3

300 0

304 2

1.01 

-0.57 

0.00 

1.69 

0.00

14.2

14.5

14.0

14.7

14.2

254 4 -0.34 14.1

255 4 -0.34 14.1

283 0 -4.72 12.8

284 0 3.04 15.1

287 3 -0.67 14.0

1.01

0.67

6.74

1.35

14.5

14.4

16.2

14.6

136
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Mn (Manganese)

0. Other 

1. AA: direct, air 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab Rating Z-value

1 3 -0.82 

5 4 -0.09 

8 4 0.38 

11 4 0.15 

13 3 0.79

16 1 -1.73 

18 4 -0.03 

23 4 -0.09 

24 3 0.97 

25 3 0.56

26 4 0.32 

30.1 0 2.55 

32 2 1.38 

33 2 1.38 

42 0 -2.61

43 4 0.32 

46 4 0.21 

48 2 -1.38 

59 4 -0.38 

69 2 1 .44

83 3 -0.73 

85 3 0.79 

86 4 0.38 

89 2 1.03 

100 2 1.20

102 3 -0.73 

105 4 -0.09 

109 4 0.23 

119 3 0.62 

121 4 -0.38

134 4 0.32 

136 1 -1.61 

138 4 0.39 

140 4 -0.38 

141 1 -2.02

142 2 1.26 

145 2 1.03 

146 4 0.26 

149 4 -0.03 

151 0 -2.08

180 4 0.03 

191 0 -3.37 

204 1 -1.73 

212 4 0.21 

215 3 -0.97

220 2 1.17 

221 4 0.15 

234 0 -2.49 

235 1 -1.67 

236 4 -0.09

8. AA: cold vapor 

5. DCP 

6. ICP/MS 

1 9 2 35 1 14 

301 277 305 264 330 249 

331 317 328 362 

306 310 288 

8 9 33

013456

293 

305 

313 

309 

320

277 

306 

305 

323 

316

312 

350 

330 

330 

262

312 

310 

283 

300 

331

294 

320 

313 

324 

327

294 

305 

311 

317 

300

312 

279 

313 

300 

272

328 

324

311 

306 

271

307 

249 

277 

310 

290

327 

309 

264 

278 

305

MPV= 307

F-pseudosigma = 17 

N= 62 

Hu= 317 

HI = 294

Lab Rating Z-value 01 3456

241 1 -1.73 277 

246 3 1.00 324 

247 4 -0.03 306 

254 4 -0.09 305 

255 4 0.44 314

283 1 -1.96 273 

284 4 -0.30 301 

287 1 -1.67 278 

292 4 -0.50 298 

297 4 -0.06 305

300 0 3.26 362 

304 3 0.91 322

137
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Mo (Molybdenum) |ig/L

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 3

94.0 34.6

40.0

20

31.3

42.2

36.1

2.9

14

34.8

44.9

38.2

1.9

Lab Rating Z-value

MPV =

F-pseudosigma =

N =

Hu =

Hl =

37.8

3.5

38

39.7

35.0

1

5 

8 

11 

13

16 

18 

24 

26 

30.1

32 

42 

46 

48 

100

105 

119 

134 

136 

138

141 

142 

145 

146 

151

180 

215 

220 

221 

234

236 

241 

246 

247 

255

283 

284 

292 

300 

304

4 

3 

0 

4 

NR

4 

3 

4 

4 

2

1 

4 

2 

4 

4

4 

4 

4 

3 

4

1 

4 

4 

4 

3

3 

4 

3 

3 

2

3 

3 

3 

4 

3

3 

0 

1 

0 

4

0.01 

-0.99 

-5.09 

-0.30

-0.16 

-0.79 

0.33 

-0.50 

1.22

1.51 

-0.22 

1.28 

0.07 

-0.44

0.36 

-0.01 

0.16 

0.90 

-0.42

-1.85 

0.50 

0.36 

-0.19 

0.56

-0.79 

-0.50 

0.88 

-0.90 

-1.22

-0.79 

0.65 

0.56 

0.16 

-0.79

-0.85 

16.14 

-1.65 

2.05 

0.07

34.3 

<20 

36.7 

<50

35.0 

38.9 

36.0

42.2 

36.2

37.7 

38.3 

40.9

31.3

39.0 

37.1

35.0 

36.0 

40.8 

34.6 

33.5

35.0 

40.0 

39.7

35.0

94.0 

32.0

37.8

37.2 

42.0

43.0 

37.0

38.0

39.0 

36.3

39.5 

39.7

38.3

34.8

44.9 

38.0

138
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Na (Sodium) mg/L

0. Other 

1 . AA: direct, air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5. DCP 

6. ICP/MS

12. Flame emission

1 14

108 102

123

113

3

36 1

94 118

129

117

4

6

81

124

3

113

126

Lab Rating Z-value

1 

5 

8 

11 

13

16 

18 

23 

24 

25

26 

30.1 

30.2 

32 

33

43 

46 

48 

59 

64

69 

83 

85 

86 

89

100 

102 

105 

109 

119

121 

134 

138 

140 

141

142 

145 

146 

149 

180

191 

196 

204 

212 

215

220 

221 

234 

236 

241

4 

2 

4 

0 

4

3 

3 

3 

4 

2

3 

2 

0 

1 

3

3 

4 

1 

2 

4

4 

4 

3 

3 

3

0 

0 

4 

4 

4

4 

3 

4 

4 

0

1 

3 

0 

4 

4

4 

1 

4 

3 

3

4 

4 

4 

2 

0

-0.29 

1.12 

0.00 

-2.25 

0.45

0.90 

-0.61 

0.63 

0.45 

1.12

0.67 

-1.12 

2.47 

1.80 

0.67

-0.90 

0.45 

2.02 

-1.12 

0.22

-0.22 

0.45 

-0.90 

0.90 

-0.67

3.15 

-4.72 

-0.22 

-0.45 

0.45

0.00 

-0.79 

-0.45 

0.22 

-3.35

1.80 

0.71 

2.70 

0.00 

0.22

-0.16 

1.73 

-0.45 

0.67 

-0.67

-0.20 

-0.45 

0.45 

-1.15 

-2.92

118

110 

116

111 

112

113

112 

116

115

123

113 

102

114 

120 

115 

105 

117

119 

112

117 

120

118 

110 

126 

123 

118

111 

117 

124

114 

117

119

129 

94 

114

117

115 

113 

100

123 

118 

127

116

114

113 

118 

112

114

117 

110

MPV = 

F-pseudosigma =

Hl =

115

4

61

118

112

Lab

246 

247 

254 

255 

283

284 

287 

292 

297 

300

304

Rating

1 

2 

4 

2 

0

2 

3 

4 

4 

0

3

Z-value

-1.89 

1.35 

0.00 

1.35 

-2.92

-1.46 

-0.67 

0.13 

0.22 

-7.67

0.67

0 1 4 5 6 12

107 

121 

115 

121 

102

108 

112 

116 

116 

81

118

139
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Ni (Nickel)

15.00

0. Other 

1. M: direct, air

3. M: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 2

9.00 3.00

60.00

7

2.00

6.92

6.17

0.69

9

5.46

16.70

6.93

1.38

18

4.80

13.80

8.00

2.00

Lab Rating Z-value

MPV'

F-pseudosigma : N = HIP

Hh

6.92

2.08

37

8.80

6.00

1

5 

8 

13 

16

18 

25 

26 

30.1 

32

42 

48 

59 

69 

83

85 

89 

100 

102 

105

119 

126 

134 

136 

138

140 

141 

142 

145 

146

149 

151 

180 

191 

204

212 

215 

220 

221 

234

235 

236 

241 

246 

247

254 

255 

283 

284 

287

4 

NR 

NR 

NR 

0

4 

NR 

4 

3 

2

0 

4 

3 

NR 

NR

NR 

3 

4 

0 

3

4 

0 

3 

0 

4

1 

NR 

4 

0 

NR

4 

4 

NR 

4 

3

3 

4 

4 

4 

4

4 

4 

NR 

NR 

3

NR 

NR 

3 

3 

0

-0.36 

3.31

-0.44

-0.36 

0.66 

1.48

3.07 

-0.44 

0.91

-0.90 

0.00 

-2.85 

0.52

-0.40 

25.57 

-0.70 

4.71 

0.45

-1.89

-0.10 

2.93

-0.44 

-0.15

0.04 

-0.85

0.86 

-0.44 

0.13 

-0.09 

0.00

-0.35 

-0.44

0.95

0.52 

1.00 

-2.37

6.17 

< 10 

<10 

<20

6.00 

<49 

6.17

<50 

<15

< 10 

5.06 

6.93

< 1

60.00 

5.46 

16.70 

7.86

3.00 

<20

13.00 

<40

6.00 

<16.3

6.00 

7.20 

6.74 

6.92

6.00 

< 10 

<15

< 15 

<5.2

9.00 

2.00

13.80

8.30 

10.00

13.30 

6.00 

8.80

8.00

6.10

6.71

6.60

7.00 

5.15

8.70

6.20 

8.90

8.00

Lab Rating Z-value

292 NR

300 1 1.53

304 2 -1.02

<20

10.10

4.80

140
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)~Continued

Pb (Lead)

170 \- 

165 '--

160 \- 

155 i. ------------

150 ^ 

145 : - - 

: 1

;:: v -?^

130 \- V

19*i ~ '

0. Other 

1. AA: direct, air 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab Rating Z-value

1 4 -0.40 

5 4 0.00 

8 0 -2.25 

1 1 3 -0.66 

12 0 -2.91

1 3 4 0.40 

16 4 0.26 

18 2 -1.32 

23 1 -1.59 

24 3 0.93

25 4 -0.26 

26 4 0.13 

30.1 4 0.40 

32 3 -0.53 

33 0 16.40

42 0 2.42 

46 3 -0.79 

48 3 -0.53 

59 4 0.00 

69 1 -1.85

76 3 -0.56 

83 4 -0.13 

89 0 -4.36 

100 0 2.51 

102 4 0.26

105 1 1.59 

119 2 -1.45 

126 3 -0.66 

134 4 -0.21 

136 2 1.45

138 3 0.53 

140 4 -0.26 

141 0 -3.97 

142 0 30.95 

145 0 4.23

146 2 1.32 

149 4 -0.26 

151 4 0.26 

180 2 1.32 

191 1 -1.85

204 3 0.93 

212 2 -1.32 

215 2 -1.32 

220 4 0.19 

221 3 -0.79

234 3 -0.53 

235 3 -0.53 

236 4 0.26 

241 4 0.26 

246 4 0.00

 /

/ ****

 T

-mmm**^ ^400 *4

 ^ " " 7*^ ^ /^+++S

A A

/

 ,-0-1 - -,-«-. ^.-^.

4. ICP 

5. DCP MPV = 

6. ICP/MS F-pseudosigma = 

1 1 21 17 1 19 N = 

149 148 16 120 274 136 Hu = 

169 182 384 HI = 

145 151 152 

9 10 10

013456 Lab Rating Z-value 0 1

147 247 1 1.72 

150 254 4 0.00 

133 255 0 2.78 

145 283 4 0.00 

128 284 4 -0.13 149

153 287 0 -17.72 

152 292 0 -4.63 

140 297 3 0.71 

138 300 0 2.65 

157 304 4 0.13

148 

151 

153 

146 

274

168 

144 

146 

150 

136

146 

149 

117 

169 

152

162 

139 

145 

148 

161

154 

148 

120 

384 

182

160 

148 

152 

160 

136

157 

140 

140 

151 

144

146 

146 

152 

152 

150

S">

150 

8 

60 

155 

145

3456

163 

150 

171 

150

16 

115 

155 

170 

151

141
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Sb (Antimony)

11na

0. Other 

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS 

11. AA: hydride NaBH<

1 14

19.0 19.5

30.5

24.0

2.7

7

17.0

78.1

22.9

5.4

15

13.6

32.4

25.0

1.2

1

2.2

MPV = F-pseudosigma : N = Hu = Hh

24.1

3.3

38

25.5

21.1

Lab Rating Z-value 11na

1 

5 

8 

11 

13

16 

18 

25 

26 

30.1

32 

42 

46 

48 

59

69 

76 

89 

100 

102

105 

119 

134 

138 

141

142 

146 

151 

180 

212

215 

234 

241 

246 

247

255 

283 

284 

292 

300

304

2 

3 

0 

3 

4

0 

4 

NR 

1 

3

4 

4 

3 

4 

4

2 

4 

4 

4 

0

4 

2 

3 

4 

3

0 

NR 

4 

2 

4

1 

4 

1 

NR 

4

0 

4 

1 

4 

0

4

-1.34 

0.95 

-6.68 

-0.55 

0.03

-3.20 

-0.34

-1.80 

0.58

-0.03 

0.09 

-0.95 

0.27 

0.40

-1.37 

0.29 

0.15 

0.15 

-2.17

-0.15 

-1.40 

-0.92 

-0.37 

0.73

2.17

0.09 

1.13 

0.27

1.80 

-0.06 

1.95

0.43

16.48 

-0.40 

-1.56 

-0.03 

2.53

-0.15

19.7 

24.2

23.0

21.0

19.6

24.6 

24.6

19.5 

21.1

26.5

30.0 

23.9 

30.5

19.0 

24.0

27.2 

22.3

<51 

18.2

17.0

22.9

<50 

27.8

<85

78.1

2.2

13.6 

26.0

24.0 

24.4

25.0 

25.4

25.1

23.6

31.2 

24.4 

25.0

25.5

22.8 

32.4

23.6

142
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Se (Selenium)

8.00

6.00

4.00

2.00

0.00

11na

0. Other 

3. M: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS 

11.AA: hydride NaBH4

1 6 1

1.00 0.58 59.60

3.00

11

2.20

11.50

6.22

2.27

6

1.20

2.26

Lab Rating Z-value 11na

1

5 

8

13 

16

18 

25 

26 

30.1 

32

42 

48 

59 

69 

86

89 

100 

102 

105 

119

126 

134 

136 

138 

141

142 

146 

151 

180 

191

204 

212 

215 

220 

221

234 

236 

241 

246 

247

255 

283 

284 

292 

300

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

2.62

<5 

11.50

<1 

<129

6.80 

<4

8.00 

2.20 

5.40 

<5

<2 

<5 

<7

0.58 

59.60 

3.30 

<2

6.22 

<10 

4.00 

<53.2 

<2

7.52 

6.30 

<5 

2.20 

1.00

2.32 

<90 

<5 

<80 

<5

<2 

<5 

1.00 

3.00 

4.19

2.10 

1.20

1.56

1.93

2.22 

2.26

<1

MPV = insufficient data 

N= 25

143
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)--Continued

Si02 (Silica) mg/L

6 X 22

0. Other 

2. AA: direct nitrous, oxide

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5.DCP 

6. ICP/MS

22. Colorimetric

1 1 25

20.5 25.3 19.9

37.7

27.0

1.4

1 3

26.3 26.6

28.2

7

25.2

43.7

26.4

1.4

Lab Rating Z-value

MPV = 

F-pseudosigma =

Hu = 

Hl =

26.9

1.6

38

27.8

25.6

22

1

5 

8 

11

13

23 

24 

25 

26 

32

33 

43 

64 

83 

89

100 

102 

105 

119 

121

134 

138 

140 

142 

145

151 

191 

204 

212 

215

234 

236 

241 

246 

247

254 

283 

284

3 

4 

2 

0 

4

4 

3 

0 

3 

3

4 

4 

3 

2 

4

2 

2 

2 

4 

3

4 

4 

3 

1 

4

4 

4 

2 

4 

0

4 

0 

3 

4 

0

2

0 

0

-0.58 

0.09 

-1.01 

-2.85 

0.46

-0.28 

0.58 

6.65 

0.83 

0.83

-0.34 

-0.28 

-0.52 

-1.13 

-0.03

1.38 

-1.13 

1.13 

0.28 

0.58

0.17 

-0.46 

-0.77 

1.99 

0.06

0.34 

-0.15 

1.07 

0.03 

-2.67

-0.28 

-4.26 

-0.95 

0.43 

10.33

-1.01 

2.54 

-3.89

25.9 

27.0

22.2 

27.6

27.8 

37.7 

28.2

26.4 

26.0 

25.0

29.1 

25.0 

28.7 

27.3 

27.8

27.1

30.1 

26.9

26.9 

22.5

26.4 

19.9 

25.3 

27.6

25.2 

31.0 

20.5

25.2

26.4 

28.2

26.3 

26.8

26.1 

25.6

27.4 

26.6 

28.6

43.7

144
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Sr (Strontium)

900

0. Other

4.ICP

5.DCP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 25 1

1242 726 914

868

814

24

6

1

816

Lab Rating Z-value

MPV =

F-pseudosigma =

N =

Hu =

Hl =

810

27

33

832

795

1

5 

8 

11 

16

18 

24 

25 

30.1 

32

33 

85 

86 

100 

102

105 

121 

134 

136 

138

142 

145 

151 

191 

234

235 

236 

246 

247 

254

283 

284 

300

3 

1 

4 

4 

1

1 

1 

0 

4 

2

0 

4 

2 

3 

1

3 

4 

4 

1 

4

4 

3 

4 

4 

4

4 

3 

4 

3 

4

0 

0 

0

-0.58 

1.53 

-0.40 

-0.22 

-1.68

-1.79 

1.90 

2.11 

0.00 

-1.09

3.79 

-0.29 

1.28 

0.80 

1.86

0.80 

0.15 

-0.09 

-1.75 

0.29

0.22 

0.88 

0.22 

-0.36 

-0.29

0.18 

-0.55 

0.33 

-0.84 

-0.36

-3.06 

15.75 1242 

-29.49

852 

799 

804 

764

761 

862 

868

802 

845 

832 

861

832 

814 

808 

762 

818

816 

834

802

815 

795 

819 

787 

800

726

794

810 

780

914

816 

800

1

145
Table 19. Statistical'summary'of'reported'data for-standard'referencesample GWT-2'(ground-water'traceconstituents)-Continued

V (Vanadium) jig/L

0. Other

3.AA:

4.ICP

graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 3

20.00 6.00

12.40

18

4.74

50.00

6.85

6.08

11

4.20

7.80

5.34

1.07

Lab Rating Z-value

1

5 

8 

13 

16

18 

23 

25 

26 

30.1

32 

42 

46 

48 

89

100 

102 

105 

134 

136

138 

141 

142 

145 

146

180 

212 

215 

220 

234

235 

236 

241 

246 

247

255 

283 

284 

300 

304

4 

4 

NR 

NR 

4

4 

4 

NR 

4 

4

4 

3 

4 

4 

2

NR 

4 

NR 

4 

2

4 

NR 

4 

0 

NR

0 

4 

0 

1 

4

4 

3 

4 

1 

4

1 

4 

0 

4 

4

0.00 

-0.47

0.04

-0.19 

0.33

-0.27 

0.32

-0.40 

-0.61 

0.03 

-0.50 

1.50

0.11

-0.39 

1.04

-0.15

-0.31 

2.42

2.32 

-0.35 

11.14 

1.91 

-0.12

-0.07 

0.63 

-0.14 

1.88 

-0.37

1.93 

-0.35 

3.45 20.00 

0.07 

-0.27

6.56 

4.74 

<10 

<50

5.80 

7.85 

<4 

5.50

6.69 

12.40

<10 

7.00

5.04 

10.60

5.96 

<10

16.00 

<10

15.60

50.00 

14.00 

6.10

9.00 

6.00 

13.90

14.10 

5.20

6.70

7.80

5.00 

4.20

4.60

<13

5.34

5.20

6.30 

5.10

6.82 

5.50

MPV = 6.56

F-pseudosigma = 3.90

N= 33

Hu= 10.60

HI = 5.34

146
Table 19. Statistical summary of reported data for standard reference sample GWT-2 (ground-water trace constituents)-Continued

Zn (Zinc)

0. Other 6. ICP/MS 

1.AA: direct, air

4.ICP

N= 1

Minimum = 351

Maximum =

Median =

F-pseudosigma =

7

339

385

363

10

30

318

420

365

10

16

194

490

359

38

Lab Rating Z-value

MPV = 

F-pseudosigma =

Hl =

363

16

54

371

350

1 

5 

8 

11 

13

16 

18 

24 

25 

26

30.1 

32 

42 

46 

48

59 

69 

83 

86 

89

100 

102 

105 

119 

121

126 

134 

136 

138 

140

141 

142 

145 

146 

151

180 

191 

204 

212 

215

220 

221 

234 

236 

241

246 

247 

254 

255 

283

1 

4 

4 

4 

2

0 

4 

3 

0 

4

2 

3 

3 

3 

0

0 

4 

2 

4 

1

4 

2 

4 

4 

0

2

4 

1 

4 

4

0 

0 

3 

4 

1

4 

4 

2 

0 

2

1 

4 

0 

4 

4

4 

3 

4 

4 

1

-1.93 

0.13 

0.00 

-0.06 

1.22

-3.34 

-0.39 

0.90 

-22.44 

0.13

1.09 

-0.51 

-0.84 

0.51 

-5.27

2.96 

-0.45 

-1.09 

0.06 

-1.54

0.32 

-1.48 

0.45 

0.45 

3.66

1.41 

0.32 

-1.61 

-0.15 

0.45

-2.89 

8.16 

0.96 

0.13 

-1.54

-0.32 

-0.06 

1.48 

-2.12 

-1.48

1.54 

0.13 

-2.06 

-0.39 

0.00

0.19 

0.96 

-0.19 

0.19 

1.99

365 

363 

362 

382

357 

377 

<4 

365

371

356 

346 

364 

339

368 

340

370 

420

385 

368 

338 

361 

370

318

378 

365

358 

340

387 

365 

331 

357 

363

366

360 

366 

394

333

311

380 

355 

350

281

409

370

490 

339

362 

386 

330

378

Lab Rating Z-value

284 3 -0.77

287 3 -0.77

292 4 -0.19

300 0 -10.86

304 0 2.25

351

351

360

194

398

147
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)

Definition of analytical methods,

Analytical methods

0 Other/Not reported

1 AA: direct, air

2 AA: direct, N2O

3 AA: graphite furnace

4 ICP

5 DCP

6 ICP/MS

7 1C

12 Flame emission

20 Titrate: color

21 Titrate: electro

22 Color:

40 Ion electrode

41 Electro

50 Gravimetric

51 Turbidimetric

Abbreviations and symbols

Constituent

Alk Alkalinity as CaCO3

B Boron

Ca Calcium

Cl Chloride

DSRD Dissolved solids

F Fluoride

K Potassium

Mg Magnesium

Na Sodium

total P Phosphorus

SiO2 Silica

SO4 Sulfate

Sp Cond Specific Conductance

abbreviations, and symbols

= atomic absorption: direct, air

= atomic absorption: direct, nitrous oxide

= atomic absorption: graphite furnace

= inductively coupled plasma

= direct current plasma

= inductively coupled plasma / mass spectrometry

= ion chromatography

= flame emission

= titration: colorimetric (color reagent specified)

= titration: electrometric

= colorimetric(color reagent specified)

= ion selective electrode

= electrometric: (type meter specified)

= gravimetric: (precipitate specified)

= turbidimetric: (precipitate specified)

N = number of analyses (excluding less than values)

MPV = most probable value

F-pseudosigma = nonparametric statistic deviation

Hu = upper hinge value

HI = lower hinge value

ng/L = micrograms per liter

mg/L = milligrams per liter

US/cm = microsiemens per centimeter at 25° C

Lab = laboratory code number

NR = not rated, less than value reported or insufficient data

< = less than

page

149

150

151

152

153

154

155

156

157

158

159

160

161

148
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)~Continued

Alkalinity (as CaC03) mg/L

285 

275 

265 

255 

245 

235 

225 - 

215

H^tl05 j-i^j. + +^ ~r ' ' ^9~^~^

j_J T . 1^4-'^ 

. - 

"^^ 

------------------------ _^_-^-_ X '^^_______

--M- .x 7

t X /

I _____ _____ /"""

 - 0 0 4 D 20 | 21 X 22 41

0. Other 

4. ICP 

20. Titrate: colorimetric

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

5 

8 

11 

12

13 

16 

24 

25 

26

33 

34 

42 

43 

46

48 

59 

68 

69 

83

85 

89 

100 

109 

119

134 

136 

138 

141.1 

142

145 

146 

151 

158 

180

204 

212 

215 

218 

220

234 

236 

241 

247 

255

283 

284 

287 

292 

294

Rating Z-value

4 0.43 

4 -0.15 

4 0.20 

3 -0.73 

2 1.23

3 -0.84 

1 -1.76 

3 0.66 

3 1.00 

3 -0.84

4 0.35 

4 0.43 

0 -29.17 

3 0.66 

4 -0.15

1 -1.88 

3 0.54 

4 -0.03 

3 -0.61 

4 0.03

3 0.77 

3 0.54 

0 -13.65 

4 0.20 

4 -0.15

4 0.47 

4 -0.15 

3 0.77 

3 0.77 

0 -2.69

0 -2.57 

3 0.66 

4 0.20 

3 -0.96 

4 -0.03

1 1.70 

3 -0.73 

4 -0.15 

0 -6.15 

4 -0.20

4 0.31 

3 0.77 

4 0.43 

2 -1.30 

4 0.31

3 -0.61 

4 0.31 

0 -2.23 

3 0.69 

4 0.08

21. Titrate: electrometric 

22. Colorimetric MPV = 253 

41. Direct reading F-pseudosigma = 9 

2 1 3 35 3 8 Rating Criterion = 13** 

41 253 252 0 231 200 N= 52 

256 256 264 248 268 Hu = 258 

254 255 Hl= 246 

9 9

0 4 20 21 22 41 Lab Rating Z-value 0 4 20 21 22 41

257 297 1 -1.88 237 

252 300 0 -24.55 41 

255 

247 

264

246 

238 

259 

262 

246

256 

257 

0 

259 

252

237 

258 

253 

248 

254

260 

258 

135 

255 

252

257 

252 

260 

260 

230

231 

259 

255 

245 

253

268 

247 

252 

200 

252

256 

260 

257 

242 

256

248 

256 

234 

259 

254

149
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

B (Boron)

4. ICP 

6. ICP/MS

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab

1

5

8

11

16

18

24

25

26

30.1

46

48

85

86

100

119

134

136

138

141.1

142

145

180

212

215

220

234

235

236

246

247

254

255

283

300

Rating

4

4

0

4

0

3

3

0

3

0

3

3

4

4

4

0

3

0

3

4

4

4

1

3

1

4

4

2

3

3

4

3

2

3

1

Z-value

-0.21

0.42

-2.50

0.35

8.14

-0.56

0.83

2.16

-0.56

-2.57

0.63

-0.83

0.14

-0.07

-0.14

-2.64

0.97

-12.78

0.81

0.49

0.00

0.42

1.67

-0.56

-1.95

-0.35

-0.07

1.18

-0.90

0.78

0.42

-0.56

1.32

-0.90

1.53

31 

54

355

238

14

4

235

244

202

243

355

230

250

269

230

247

240

237

236

200

252

54

250

245

238

244

262

230

210

233

237

255

225

249

230

257

225

4 

201

260

6

201

226

244

260

MPV =

F-pseudosigma =

N =

Hu =

Hl =

238

14

35

249

230

150
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

Ca (Calcium) mg/L

0. Other 5. 

1 . AA: direct, air 6.

4. ICP

N= 1

Minimum = 61

Maximum =

Median =

F-pseudosigma =

DCP 

ICP/MS

11

67

83

68

2

40

18

75

69

3

1 4

73 57

138

Lab Rating Z-value

MPV =

F-pseudosigma = N =

Hu =

Hl =

68.4

2.5

57

70.0

66.6

1 

5 

8 

11 

13

16 

18 

24 

25 

26

30.1 

33 

43 

46 

48

59 

64 

68 

69 

83

85 

86 

89 

100 

102

109 

119 

134 

136 

138

140 

141.1 

142 

145 

146

180 

191 

204 

212 

215

218 

220 

221 

234 

235

236 

241 

246 

247 

254

4 

0 

0 

2 

4

4 

2 

3 

0 

4

0 

1 

4 

3 

2

4 

3 

2 

4 

3

3 

3 

0 

3 

3

4 

4 

4 

0 

4

3 

0 

4 

4 

4

4 

3 

3 

3 

0

3 

3 

4 

3 

1

3 

0 

4 

3 

4

0.05 

-2.21 

-3.05 

1.08 

0.09

0.09 

-1.10 

0.56 

2.59 

0.25

-4.51 

1.91 

0.41 

-0.75 

1.40

-0.15 

0.72 

1.16 

-0.23 

-0.95

-0.67 

0.80 

5.96 

0.56 

-0.55

-0.03 

-0.15 

0.00 

-19.83 

0.20

-0.75 

-4.91 

-0.23 

0.33 

-0.07

0.25 

-0.71 

-0.55 

0.60 

-2.49

0.64 

-0.73 

-0.31 

0.84 

1.75

-0.74 

2.67 

-0.15 

0.60 

-0.15

68.5 

62.8 

60.7 

71.1 

68.6

68.6 

65.6 

69.8 

74.9 

69.0

57.0 

73.2 

69.4 

66.5 

71.9

68.0 

70.2 

71.3 

67.8 

66.0

66.7 

70.4 

83.4 

69.8 

67.0

68.3 

68.0 

68.4 

18.4 

68.9

66.5 

56.0 

67.8 

69.2 

68.2

69.0 

66.6 

67.0 

69.9 

62.1

70.0 

66.5 

67.6 

70.5 

72.8

66.5 

75.1 

68.0 

69.9 

68.0

Lab Rating

255 3 

283 0 

284 0 

287 3 

292 2

297 1 

300 0

Z-value

0.52 

-3.92 

-3.09 

-0.55 

1.20

1.52 

27.62

0 1

60.6 

67.0 

71.4

4

69.7 

58.5

72.2

5 6

138.0

151
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

Cl (Chloride) mg/L

7 n 20 x 22

0. Other 

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

7. Ion chromatography 

20. Titrate: colorimetric

22. Colorimetric

3 1

47.0 48.2

55.5

1 34

49.0 45.0

68.0

48.6

1.9

3

4.0

62.0

14

42.0

53.0

49.4

2.2

MPV = 

F-pseudosigma =

Hu = 

Hl =

48.9

2.0

56

50.0

47.3

Lab Rating Z-value 20 22

1 

5 

8 

11 

12

13 

16 

24 

25 

26

30.1 

42 

46 

48 

59

64 

68 

69 

76 

83

85 

86 

89 

100 

102

119 

134 

138 

140 

141.1

141.2 

142 

145 

146 

151

180 

191 

204 

208 

212

215 

220 

221 

234 

236

241 

246 

247 

255 

283

3 

4 

1 

3 

3

3 

3 

4 

3 

4

2 

3

4 

0 

4

4 

1 

3 

4 

3

4 

4 

3 

0 

4

2

4 

4 

3 

3

2 

2

4 

0 

4

3 

4 

3 

4 

2

0 

2 

4 

4 

3

3 

2

4 

4 

1

-0.82 

-0.32 

-1.90 

0.57 

-0.91

-0.57 

-0.91 

-0.22 

-0.91 

0.22

-1.01 

0.72 

0.17 

-3.38 

-0.42

0.12 

1.80 

0.57 

0.33 

-0.91 47.0

0.37 

-0.07 

-0.77 

3.19 

0.07

-1.21 

0.29 

-0.32 

0.55 

-0.91

-1.01 

1.11 

0.22 

2.05 

0.07

0.57 

-0.22 

-0.57 47.7 

-0.17 

1.06

6.50 

1.32 

-0.27 

-0.37 

0.52

0.52 

-1.01 

-0.22 

0.37 

-1.85

47.2 

48.2 

45.0

47.7

47.0 

49.3

46.8 

50.3

48.0

49.1 

49.5

49.6 

48.7 

47.3 

55.3 

49.0

46.4 

49.4 

48.2

46.8 

51.1 

49.3

49.0

50.0 

48.4

48.5 

51.0

48.1 

49.9

49.9 

46.8 

48.4

45.1

50.0 

47.0

47.0 

48.4

49.2 

42.0

52.5 

50.0

50.0 

47.0

53.0

62.0 

51.5 

48.3

49.6

Lab Rating Z-value 20 22

284

287

292

294

297

0

0

3

3

4

3.29 55.5

-22.16

-0.57

0.72

0.07

47.7

50.3

4.0

49.0

300 9.46 68.0

152
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

DSRD (Dissolved solids) mg/L

650

 D 50

50. Gravimetric

Lab

1

5

8

11

12

13

16

18

25

26

43

46

48

59

69

76

85

89

100

109

119

134

138

140

141.1

142

146

212

215

221

234

236

241

247

283

284

292

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Rating Z-value

2 1.35

3 0.64

3 0.57

4 0.14

1 -1.56

3 -0.99

4 -0.34

3 -0.99

0 -2.98

3 -0.78

3 0.57

3 0.71

2 1.28

3 0.64

3 0.85

4 0.07

3 -0.92

4 -0.21

4 0.43

2 -1.21

3 -0.71

3 0.71

4 -0.43

2 -1.07

4 -0.36

1 -1.70

3 -0.71

4 0.00

4 -0.07

4 0.43

3 0.71

4 0.00

4 -0.14

0 7.74

0 3.27

3 -0.71

0 3.12

37

560

711

602

14

50

621

611

610

604

580

588

597

588

560

591

610

612

620

611

614

603

589

599

608

585

592

612

596

587

597

578

592

602

601

608

612

602

600

711

648

592

646

MPV =

F-pseudosigma =

N =

Hu =

Hl =

602

14

37

611

592

153
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

F (Fluoride) mg/L

1.50

-40

0. Other 

7. Ion chromatography

40. Ion selective electrode

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab

1

8

11

13

18

18

24

25

42

46

48

59

69

76

83

85

86

89

100

119

134

138

140

141.1

141.2

142

145

146

151

180

208

212

215

234

236

241

246

247

255

283

284

287

292

294

300

Rating

4

3

3

1

4

4

4

3

1

3

2

3

4

3

2

4

2

3

3

4

4

2

3

2

0

4

4

3

2

1

0

3

4

3

3

3

4

4

3

4

0

2

2

0

2

Z-value

0.44

-0.86

-0.97

-1.51

-0.32

0.33

0.44

0.65

1.84

0.65

1.30

0.65

-0.10

-0.86

1.30

-0.21

1.08

0.65

-0.64

-0.21

-0.10

1.08

0.54

1.19

-2.76

-0.01

-0.43

0.65

-1.07

1.62

-9.09

-0.86

-0.21

-0.64

-0.86

-0.53

-0.32

0.01

0.76

0.22

2.38

1.30

-1.18

-2.28

1.30

1 15

1.40 0.92

1.35

1.14

0.11

0 7

1.10

1.04

1.35

1.28

0.92

1.14

1.33

<0.3

1.12

1.10

1.15

1.18

1.20

1.40

1.07

0.97

1.30

28

1.08

1.30

1.22

0.06

40

1.22

1.09

1.15

1.21

1.22

1.24

1.24

1.30

1.24

1.17

1.10

1.30

1.16

1.24

1.12

1.16

1.17

1.28

1.23

1.29

1.18

1.24

1.08

1.10

1.16

1.13

1.25

1.30

MPV =

F-pseudosigma =

N =

Hu =

Hl =

1.18

0.09

44

1.25

1.12

154
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituentsJ-Continued

K (Potassium) mg/L

5.50 

5.25 

5.00 

4.75 

4.50 

4.25 

4.00 

3.75 

3.50 

3.25

1

. r

/

 _ _ _ i300°°^-

__^H^°

jher 1-1

/vv^O^^ J /

W-S^~~\X'~^r ^ws/yo^o^0^0^ L** *

^^^^^^ 

<x^°^

; <>^O

). Other 

. AA: direct, air 

I. ICP 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

5 

8 

11 

13

16 

18 

24 

25 

26

33 

43 

46 

48 

59

64 

68 

69 

83 

85

86 

89 

100 

102 

109

119 

134 

138 

140 

141.1

142 

145 

146 

180 

191

204 

212 

215 

218 

220

221 

234 

236 

241 

246

247 

254 

255 

283 

284

Rating Z-value

4 -0.04 

0 -2.31 

1 -1.64 

3 -0.81 

3 0.96

4 -0.14 

3 0.61 

2 -1.11 

4 0.19 

4 0.36

4 0.19 

4 -0.14 

4 0.11 

4 0.44 

2 1.11

3 0.86 

3 0.51 

2 1.09 

3 -0.54 

4 0.29

4 -0.29 

3 -0.66 

4 -0.44 

2 -1.39 

3 0.99

2 -1.14 

4 -0.17 

3 -0.89 

4 -0.24 

1 -1.59

4 0.04 

3 -0.94 

3 0.74 

3 -0.99 

4 0.04

4 0.34 

NR 

0 -8.65 

2 1.11 

2 1.11

3 0.84 

4 -0.14 

3 -0.54 

2 1.36 

3 0.51

3 0.66 

3 -0.64 

4 -0.06 

0 -2.44 

2 1.04

^0^+4^5+6^2

5. DCP 

6. ICP/MS MPV = 4.46 

12. Flame emission F-pseudosigma = 0.40 

2 15 29 1 3 2 N= 52 

4.60 4.19 3.48 4.53 4.47 4.59 Hu = 4.74 

4.87 7.40 4.90 8.20 4.89 HI = 4.20 

4.44 4.34 

0.34 0.44

0 1

4.44

4.40 

4.60

4.90

4.80

4.24 

4.57

4.19 

4.85

4.39 

4.36

4.79 

5.00

4.20 

4.87

4 5 6 12 Lab Rating Z-value 0 1 4 5 6 12

287 0 7.36 7.40 

3.53 292 4 -0.14 4.40 

3.80 297 3 -0.89 4.10 

4.13 300 0 9.36 8.20 

4.84

4.70 

4.01 

4.53

4.53 

4.40 

4.50 

4.63

4.66 

4.89

4.34

4.28 

3.90

4.00 

4.10 

3.82

4.47 

4.08 

4.75 

4.06 

4.47

4.59 

<5 

<1 

4.90 

4.90

4.40 

4.24

4.66

4.72

4.43 

3.48

155
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituentsJ-Continued

Mg (Magnesium) mg/L

0. Other 

1. AA: direct, air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

5. DCP 

6. ICP/MS

1 11

15.0 13.6

14.3

14.0

0.2

40

3.5

16.0

14.0

0.5

1 4

14.2 13.4

21.6

Lab Rating Z-value

MPV =

F-pseudosigma = 

N =

Hl =

14.0

0.4

57

14.3

13.7

1

5 

8 

11 

13

16 

18 

24 

25 

26

30.1 

33 

43 

46 

48

59 

64 

68 

69 

83

85 

86 

89 

100 

102

109 

119 

134 

136 

138

140 

141.1 

142 

145 

148

180 

191 

204 

212 

215

218 

220 

221 

234 

235

236 

241 

246 

247 

254

3

4 

0 

4 

4

3 

0 

4 

1 

3

2

4 

4 

3 

0

4 

3 

1 

4 

1

4 

2 

4 

1 

4

4 

4 

3 

0 

2

3 

0 

1 

3

4

4 

4 

4 

3 

0

0 

2 

3 

3 

3

4 

3 

1 

3 

3

-0.67 

-0.45 

-3.15 

0.00 

0.22

-0.90 

-2.92 

0.22 

1.80 

0.67

-1.35 

0.45 

0.00 

-0.90 

2.25

0.00 

-0.67 

2.02 

0.00 

-1.64

-0.45 

1.12 

0.00 

1.80 

0.00

-0.45 

0.00 

0.82 

-23.59

-1.10

-0.90 

-4.95 

1.57 

0.52 

0.00

-0.45 

-0.22 

-0.45 

0.67 

-3.15

4.50 

-1.17 

0.67 

-0.90 

0.67

-0.27 

0.67 

1.51 

0.67 

-0.67

13.7 

13.8 

12.6 

14.0 

14.1

13.6 

12.7 

14.1 

14.8 

14.3

13.4 

14.2 

14.0 

13.6 

15.0

14.0 

13.7 

14.9 

14.0 

13.3

13.8 

14.5 

14.0 

14.8 

14.0

13.8 

14.0 

14.4 

3.5 

13.5

13.6 

11.8 

14.7 

14.2 

14.0

13.8 

13.9 

13.8 

14.3 

12.6

16.0 

13.5 

14.3 

13.6 

14.3

13.9 

14.3 

14.7 

14.3 

13.7

Lab Rating Z-value

255

283

284

287

292

297

300

4

0

0

4

4

3

0

0.22

2.70

2.25 15.0

0.00

0.45

0.90

17.09

14.0

14.2

14.1

15.2

14.4

21.6

156
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

Na (Sodium) mg/L

130 

126 

122 

118 

114 

110 - 

106 

102 -

000°

innCKJ0

yy^^^^0^ 7 

 /> /v^yOXH^O^^ A 1 /

^y*^*^ ++ +4

J* 4

0. Other 

1 . AA: direct, air 

4. ICP 

N= 1 

Minimum = 121 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

5 

8 

11 

13

16 

18 

24 

25 

26

30.1 

30.2 

33 

43 

46

48 

59 

64 

68 

69

83 

85 

86 

89 

100

102 

109 

119 

134 

138

140 

141.1 

142 

145 

146

180 

191 

204 

212 

215

218 

220 

221 

234 

236

241 

246 

247 

254 

255

Rating Z-value 0

4 -0.23 

3 0.77 

0 -2.43 

1 -1.83 

4 -0.03

4 0.17 

4 -0.13 

3 0.77 

1 1.77 

2 1.17

4 -0.23 

3 0.97 

4 0.17 

4 -0.43 

2 -1.03

1 1.77 

3 -0.55 

4 0.37 

4 0.17 

4 -0.23

4 0.17 

3 -0.63 

3 0.97 

4 -0.43 

3 0.77

0 -4.43 

4 -0.21 

3 -0.83 

3 0.57 

3 -0.63

4 0.17 

0 -3.13 

1 1.97 

4 0.21 

0 2.37

4 0.37 

4 -0.07 

4 -0.23 

3 0.97 

0 -2.43

1 1.97 

4 0.03 

4 -0.43 

3 0.57 

3 -0.61

2 -1.43 

2 -1.15 

3 0.97 

4 -0.03 

2 1.37

__o-n-,^-^5 +e^,2

5. DCP 

6. ICP/MS MPV= 117 

12. Flame emission F-pseudosigma = 5 

11 36 1 4 3 N= 56 

110 91 118 112 116 Hu= 121 

120 132 126 122 HI = 114 

115 118 

3 6

1

114 

119

114 

115

116 

120

118

115

110

4 5 6 12 Lab Rating Z-value 0 1 4 5 6 12

116 283 0 -5.15 91 

121 284 3 0.79 121 

105 287 4 -0.43 115 

108 292 4 0.25 118 

117 297 0 2.97 132

118 300 2 -1.03 112 

117 

121 

126 

123

116 

122 

118 

115 

112

126

118 

116

118 

122 

121

95 

113 

114

102 

127 

118 

129

119 

117 

116 

122 

105

127 

117

120 

114

111 

122 

117 

124

157
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)~Continued 

total P as P (total Phosphorus as phosphorus) mg/L

0.28

0.26

0.24

0.22

0.20 -,

0.18

0.16--

0.14

0.12

xx***

*=x-x=x=x=x:

x

v

x

6 X 22m

0. Other 

4. ICP

6. ICP/MS

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

22m. Color: phosphomolybdate

1 4

0.65 0.19

0.30

1 34

0.19 0.03

0.62

0.20

0.02

MPV =

F-pseudoskjma =

N =

Hu =

Hl =

0.20

0.03

40

0.23

0.19

Lab Rating Z-value 22m

1 

8 

11 

12 

13

16 

25 

46 

48 

83

85 

86 

89 

102 

119

134 

138 

140 

141.1 

142

145 

146 

151 

158 

180

191 

204 

212 

215 

220

221 

234 

236 

241 

254

283 

284 

287 

292 

294

3 

3 

4 

2 

0

3 

0 

1 

1 

4

4 

0 

4 

4 

4

2

4 

4 

0 

4

2 

2

4 

3 

4

4 

4 

4 

4 

3

1 

4 

4 

4 

4

0 

0 

0 

3 

0

-0.76 

-0.68 

-0.30 

-1.44 

-2.58

0.69 

-3.00 

1.60 

1.60 

-0.30

0.46 

3.84 

-0.30 

-0.11 

0.08

-1.29 

-0.04 

-0.30 

2.36 

0.38

-1.06 

1.25 

-0.23 

-0.68 

-0.42

-0.19 

0.04 

0.08 

-0.30 

0.84

1.60 

0.11 

-0.08 

-0.15 

0.08

2.74 

17.18 

13.38 

0.84 

-6.31

0.18 

0.18 

0.19 

0.16 

0.13

0.22 

< 0.121 

0.24 

0.24 

0.19

0.21 

0.30 

0.19 

0.20 

0.20

0.16 

0.20 

0.19 

0.26 

0.21

0.17 

0.23 

0.19 

0.18 

0.19

0.19 

0.20 

0.20 

0.19 

0.22

0.24 

0.20 

0.20 

0.19 

0.20

0.27 

0.65 

0.55 

0.22 

0.03

297 16.19 0.62

158
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

Si02 (Silica) mg/L

-6 X 22 -*-22mb

0. Other 

2. AA: direct, nitrous oxide

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS 

22. Colorimetric

22mb. Color molybdate blue

3

10.9

29.9

1 23 1

25.7 19.2 28.8

31.5

26.3

2.1

4

26.4

30.2

6

26.4

30.1

MPV = 

F-pseudosigma =

Hu = 

Hl =

26.7

1.8

38

28.4

26.0

Lab Rating Z-value 22 22mb

1 

5 

8 

11 

13

24 

25 

26 

33 

43

46 

64 

83 

85 

89

100 

102 

119 

134 

138

140 

142 

145 

151 

191

204 

212 

215 

234 

236

241 

246 

247 

254 

255

283 

284 

294

3 

4 

4 

0 

3

3 

0 

3 

4 

4

4 

4 

2 

4 

4

2 

2 

4 

4 

4

4 

0 

4 

4 

2

2

4 

0 

4 

0

3 

4 

1 

2 

1

1 

0 

1

-0.62 

-0.22 

-0.17 

-2.70 

0.56

0.96 

2.70 

0.84 

-0.34 

-0.28

0.39 

-0.22 

-1.41 

-0.06 

0.06

1.12 

-1.24 

-0.39 

0.25 

-0.17

0.13 

2.08 

-0.25 

0.34 

1.18

1.01 

0.34 

-4.22 

-0.39 

-3.82

-0.56 

0.33 

1.97 

-1.18 

1.91

1.74 

-8.88 

1.80

25.6 

26.3

21.9 

27.7

28.4 

31.5 

28.2 

26.1 

26.2

26.3 

24.2

28.7 

24.5 

26.0 

27.1

30.4 

26.3

27.3 

19.2 

26.0 

19.9

25.7 

27.3

24.6

29.8 

10.9 

29.9

26.4

27.4

26.6 

26.8

26.4

26.9

27.3 

28.8

28.5

30.2 

30.1

159
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)--Continued

S04 (Sulfate) mg/L

106.0

81.0

22mtb -50

0. Other 

4. ICP

7. Ion chromatography

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

22mtb. Color: methyl thymol blue 

50. Gravimetric

SLTurbidimetric

2

85.1

105.0

4

0.0

88.4

37

66.7

127.0

93.5

2.2

7

78.7

105.0

93.0

13.1

3

88.1

95.9

7

93.0

412.0

102.0

5.3

1 51

MPV = F-pseudosigma =

Hu = Hh

93.6

4.0

57

96.6

91.2

Lab Rating Z-value 7 22mtb 50

1 

5 

8 

11 

12

13 

16 

24 

25 

26

30.1 

34 

42 

43 

46

48 

59 

64 

68 

69

76 

83 

85 

86 

89

100 

102 

109 

119 

134

138 

140 

141.1 

141.2 

142

145 

146 

151 

180 

191

204 

208 

212 

215 

220

221 

234 

236 

241 

246

3 

0 

4 

4

0

4 

0 

4 

0 

4

3 

0 

1 

3 

3

2

0 

4 

0 

4

4 

2 

4 

4 

4

1 

4 

3 

3 

4

4 

0 

0 

2 

4

3 

0 

4 

3 

0

0 

3 

3 

0 

3

2 

4 

2

4 

3

-0.55 

-2.12 85.1 

-0.15 

-0.15 

2.85

0.07 

-3.72 

-0.22 

-2.27 

0.10

-0.60 

3.35 

1.75 

-0.55 

0.92

1.35 

-2.30 

-0.02 

2.10 

-0.15

0.43 

-1.30 

-0.05 

0.02 

-0.37

1.85 

0.35 

0.57 

-0.70 

0.05

0.00 

2.35 

2.10 

-1.45 

-0.15

-0.90 

2.85 105.0 

-0.15 

0.75 

-6.72

-3.20 

-0.52 

0.72 

79.54 

0.79

-1.37 

0.12 

-1.27 

0.40 

-0.90

91.4

93.0 

93.0 

105.0

93.9 

78.7 

92.7 

84.5 

94.0

91.2 

100.6 

97.3

84.4 

93.5 

102.0 

93.0

95.3 

88.4 

93.4 

93.7 

92.1

101.0 

95.0

90.8 

93.8

93.6

87.8 

93.0

90.0

93.0 

96.6 

66.7

80.8 

91.5 

96.5

94.1 

88.5 

95.2 

90.0

107.0 

91.4

99.0

95.9

103.0 

102.0

412.0 

96.8

88.1

Lab Rating Z-value 7 22mtb 50

247

283

284

287

292

0.15

-0.97 

-22.15 <5

-0.15 

0.02

94.2

89.7

93.7

93.0

294 4 0.07

297 0 8.07

300 0 8.34

93.9

125.9

127.0

160
Table 20. Statistical summary of reported data for standard reference sample GWM-2 (ground-water major constituents)-Continued

SpCond (Specific Conductance) (iS/cm

41. Direct reading

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab

1

5

8

11

12

13

16

18

24

25

26

33

42

43

46

48

59

64

85

86

89

100

102

109

119

134

136

138

140

141.1

142

145

146

151

158

180

204

212

215

218

234

236

241

246

247

255

283

284

287

292

Rating

4

4

2

4

0

4

4

2

4

4

4

2

4

4

4

4

4

4

4

3

4

4

4

4

4

4

1

4

3

4

4

4

0

4

4

2

3

3

2

0

4

4

0

4

4

0

4

4

1

4

Z-value

0.06

0.02

-1.09

-0.30

-5.20

0.21

0.17

-1.28

0.13

-0.26

0.34

-1.37

-0.21

0.00

-0.09

0.24

0.11

0.13

-0.13

0.73

0.02

0.11

0.39

-0.11

0.06

-0.11

-1.54

-0.49

0.54

0.30

0.26

-0.11

-2.27

-0.21

0.21

-1.28

-0.60

-0.66

1.37

-19.80

0.39

0.13

-3.08

-0.30

0.39

2.06

0.28

0.00

-1.95

0.04

52

9

1030

934

47

41

937

935

883

920

691

944

942

874

940

922

950

870

924

934

930

945

939

940

928

968

935

939

952

929

937

929

862

911

959

948

946

929

828

924

944

874

906

903

998

9

952

940

790

920

952

1030

947

934

843

936

F-pseudosigma : 

Rating Criterion :

Hl =

934

26

47 **

52 

944 

909

Lab Rating Z-value

294

297

4 -0.09 

3 -0.60

930

906

161
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)

Definition of analytical methods, abbreviations, and symbols__________________ ___ __

Analytical methods

0. Other/Not reported

1. AA: direct, air

2. AA: direct, N2O

3. AA: graphite furnace

4. ICP

5. DCP

6. ICP/MS

7. 1C

10. AA: extraction

11. AA: hydride

12. AA: flame emission 

22. Color:

atomic absorption: direct, air

atomic absorption: direct, nitrous oxide

atomic absorption: graphite furnace

inductively coupled plasma

direct current plasma

inductively coupled plasma / mass spectrometry

ion chromatography

atomic absorption: extraction (chelating agentfs] specified)

atomic absorption: hydride (reducing agent specified)

atomic absorption: flame emission

colorimetric (color reagent specified)

Abbreviations and symbols

Constituent

Ag Silver

Al Aluminum

As Arsenic

B Boron

Ba Barium

Be Beryllium

Ca Calcium

Cd Cadmium

Co Cobalt

Cr Chromium

Cu Copper

Fe Iron

K Potassium

N = number of analyses-(excluding less than values)

MPV = most probable value

F-pseudosigma = nonparametric statistic deviation

Hu = upper hinge value

HI = lower hinge value

l^g/L = micrograms per liter

mg/L = milligrams per liter

Lab = laboratory code number

NR = not rated, less than value reported or insufficient data

< = less than

page Constituent

163 Li Lithium

164 Mg Magnesium

165 Mn Manganese

166 Mo Molybdenum

167 Na Sodium

168 Ni Nickel

169 Pb Lead

170 Sb Antimony

171 Se Selenium

172 SiO2 Silica

173 Sr Strontium

174 V Vanadium

175 Zn Zinc

page

176

177

178

179

180

181

182

183

184

185

186

187

188

162
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Ag (Silver)

105.0

95.0

85.0 -

75.0 -~ ~«~

65.0

55.0

45.0

35.0

0. Other 

1. AA: direct, air

4. ICP 

6. ICP/MS

3. AA: graphite furnace

Lab

1

5

8

11

12

16

18

25

30.1

34

42

46

48

59

69

85

89

100

105

127

134

140

141

146

212

215

235

241

246

247

283

284

N =

Minimum =

Maximum =

Median =

F-pseudosigrna =

Rating Z-value

3 0.65

4 0.09

0 -4.17

0 -2.68

1 1.69

4 -0.44

4 0.00

NR -5.58

4 0.00

3 0.84

3 -0.82

4 -0.27

3 -0.71

4 0.09

3 -0.70

3 0.71

4 0.00

1 1.78

4 -0.22

0 3.64

4 -0.44

4 0.09

1 1.53

4 -0.23

2 -1.33

3 0.98

2 1.27

2 -1.15

2 1.08

4 -0.33

0 -4.08

4 0.44

1 2 10

74.0 70.0 56.0

77.0 88.0

73.2

10.4

0 1 3

76.3

70.0

88.0

78.5

66.0

61.1

77.0

69.0

70.0

80.0

83.3

56.0

74.0

10

22.0

110.0

67.7

23.9

4

22.0

38.8

69.0

<6

89.0

110.0

64.0

86.2

66.4

54.0

81.2

8

23.0

70.0

64.0

5.4

6

64.0

69.0

59.8

61.0

70.0

66.5

65.3

23.0

MPV = F-pseudosigma :

69.0

11.3

31

77.8

62.6

163
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)~Continued

Al (Aluminum) |j,g/L

0. Other

2. AA: direct, nitrous oxide

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab Rating Z-value

1 4 -0.06

4 4 -0.15

5 3 0.51

8 3 -0.68

11 1 -1.82

16 4 0.06

18 3 -0.68

25 4 0.11

30 1 0 -2.39

42 2 -1.12

46 4 0.23

48 4 0.23

59 0 -9.15

69 4 -0.45

85 4 0.17

86 3 0.68

89 3 -0.63

100 4 0.21

105 3 -0.91

127 4 0.06

134 3 0.80

141 0 -2.50

146 2 -1.25

212 4 0.00

215 4 0.45

235 3 0.68

237 4 0.17

241 3 0.97

246 3 0.55

247 2 -1.19

253 0 -2.78

254 4 0.34

283 2 1.36

284 0 -4.09

4. ICP

6. ICP/MS

1 1 3 22

22000 24300 28100 24798

30900 31600

29500

864

0234

28934

30100

28000

26000

29300

28000

29400

29600

28400

29500

30400

28100

29571

29300

30600

24798

27000

29200

30000

30400

29500

30900

30160

27100

24300

29800

31600

22000

6

13

29600

6

29100

25000

27226

29600

13100

27600

MPV= 29200

F-pseudosigma = 1760

N= 34

Hu= 29600

Hl= 27226

164
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

As (Arsenic) (ig/L

Una

0. Other 6. ICP/MS

3. AA: graphite furnace

4. ICP

Lab

4

5

8

11

12

16

18

25

30.1

42

46

48

59

69

89

100

105

127

134

136

141

146

212

215

235

241

246

247

254

283

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Rating Z-value

2 1.18

2 1.01

0 -5.18

4 -0.13

4 -0.30

4 -0.07

4 0.00

0 -3.93

3 0.74

0 -4.50

2 -1.11

0 -4.89

4 0.13

3 0.78

1 1.59

4 0.00

3 0.94

4 0.13

3 0.71

0 24.15

4 0.20

4 -0.17

3 -0.61

2 -1.38

4 0.24

4 -0.07

3 0.81

2 -1.18

NR

4 -0.44

11na.AA: hydride NaBH4

1 10

102 127

198

170

22

0 3

198

159

135

172

191

168

172

189

127

166

7 9

163 23

884 196

174 161

23 67

4 6

203

164

166

168

<50

190

35

23

196

884

174

163

150

175

192

133

< 1110

155

2

15

215

11na

15

215

MPV' 

F-pseudosigma ; N = 

HIT

HI'

168

30

29

190

150

284 -2-23 102

165
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

B (Boron)

300

250

3. AA: graphite furnace 

4. ICP

6. ICP/MS

N= 0

Minimum = < 50

Maximum =

Median =

F-pseudosigma =

13

22

510

157

183

3

15

28

Lab Rating Z-value

1

5 

8 

16 

18

25 

30.1 

42 

48 

85

100 

127 

134 

136 

141

212 

215 

235 

237 

246

247 

254 

283

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR

<40 

<10 

<20 

157 

<50

<23

510

464 

22 

219 

247 

192

<200 

40 

91 

373 

38

32 

<30 

22

23 

15 

28

MPV= insufficient data 

N= 16

166
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Ba (Barium) |ig/L

20.00 

18.00 :- 

16.00 :- 

14.00 ;- 

12.00 

10.00

8.00

6.00

4.00 f

2.00

0.00

0. Other 4. ICP 

1. AA: direct, air 6. ICP/MS

3. AA: graphite furnace

N= 1 1

Minimum = 28.00 260.00

Maximum =

Median =

F-pseudosigma =

2

10.00

14.00

13

8.00

136.60

9.23

3.56

8

6.60

11.00

8.90

1.52

Lab Rating Z-value

1

5 

8 

16 

18

25 

30.1 

42 

48 

59

85 

86 

89 

100 

105

127 

134 

136 

140 

141

146 

149 

212 

215 

235

237 

241 

246 

247 

283

0 

NR 

NR 

4 

4

0 

4 

4 

3 

4

4 

4 

NR 

4 

4

4 

4 

2 

0 

NR

NR 

4 

3 

0 

4

2 

2 

4 

4 

4

33.52

0.36 

-0.12

-2.25 

0.46 

-0.25 

-0.70 

-0.09

-0.33 

-0.18

0.00 

-0.06

-0.28 

0.00 

1.09 

66.00

0.20 

-0.54 

5.46 

0.46

1.25 

1.25 

-0.04 

-0.34 

-0.17

136.60 

<4 

<20

8.80

<0.7

8.00 

8.55 

<50 

9.26

8.17 

9.23 

13.40 

260.00 

<10

<10 

10.00

30.00 

11.00

14.00 

14.00 

9.10

8.60

10.60

11.00 

8.30 

6.60 

8.90

9.00

7.20

7.96

MPV = 9.23

F-pseudosigma = 3.60

N= 25

Hu= 13.40

HI = 8.60

284 4.94 28.00

167
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Be (Beryllium)

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 3

74.0 32.3

40.0

18

34.0

47.0

39.1

2.7

8

19.7

43.0

30.7

5.5

Lab Rating Z-value

MPV =

F-pseudosigma =

N =

Hu =

Hl =

38.0

3.3

30

39.7

35.3

1

4 

5 

8 

11

16 

18 

25 

30.1 

42

46 

48 

59 

69 

85

86 

89 

100 

105 

127

134 

141 

146 

212 

215

237 

241 

246 

247 

283

3 

3 

4 

4 

3

1 

3 

4 

1 

0

4 

0 

0 

4 

4

4 

1 

0 

4 

2

4 

3 

4 

0 

3

0 

3 

0 

4 

3

0.58 

-0.64 

0.28 

-0.31 

-0.83

-1.59 

0.61 

0.49 

1.53 

-5.61

0.40 

-2.45 

-2.24 

-0.46 

0.00

0.12 

-1.75 

-11.21 

0.00 

-1.23

0.37 

-0.74 

0.49 

-3.68 

-0.61

2.76 

0.61 

2.33 

-0.30 

0.52

39.9 

35.9 

38.9 

37.0 

35.3

40.0 

39.6

39.3

36.5 

38.0

38.4 

32.3 

<1

34.0

39.2 

35.6 

39.6

36.0

47.0 

40.0 

45.6

39.7

32.8

43.0 

19.7

30.0 

30.7

38.0

26.0

37.0

284 11.04 74.0

168
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Ca (Calcium) mg/L

0. Other 

1. AA: direct, air

2. AA: direct, nitrous oxide

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 7 1

324 86 329

406

328

29

26

288

398

338

27

2

270

354

Lab Rating Z-value

MPV'

F-pseudosigma : N = HIP

Hl =

338

28

37

349

311

1

4 

5 

8 

11

16 

18 

25 

30.1 

30.2

43 

46 

48 

59 

69

85 

86 

89 

100 

105

127 

134 

140 

141 

146

149 

212 

215 

235 

237

241 

246 

247 

254 

283

284 

297

4 

4 

3 

2 

1

4 

3 

2 

0 

4

4 

4 

3 

4 

3

4 

3 

0 

4 

4

2

4 

3 

1 

2

0 

4 

4 

0 

3

2 

3 

4 

4 

1

4 

2

0.00 

0.44 

-0.91 

-1.09 

-1.69

-0.10 

-0.75 

1.29 

-2.40 

-0.31

0.01 

0.15 

0.58 

0.05 

-0.52

-0.34 

0.54 

2.42 

0.26 

-0.49

-1.41 

0.37 

-0.98 

-1.78 

-1.02

-8.94 

0.05 

0.08 

2.14 

0.65

1.25 

-0.83 

0.44 

0.08 

-1.52

-0.49 324 

1.08

338 

350 

312 

307 

290

335 

317 

374 

270 

329

338 

342 

354 

339 

323

328 

353 

406 

345 

324

298 

348 

310 

288 

309

86 

339 

340 

398 

356

373 

314 

350 

340 

295

368

169
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Cd (Cadmium)

0. Other 

1 . AA: direct, air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 1 9

150 180 161

300

186

10

18

138

193

174

20

9

140

185

165

15

Lab Rating Z-value

1

4 

5 

8 

11

12 

16 

18 

25 

30.1

34 

42 

46 

48 

59

69 

86 

89 

100 

105

127 

134 

136 

140 

141

146 

149 

212 

215 

235

237 

241 

246 

247 

253

254 

283 

284

3 

3 

4 

3 

0

3 

3 

3 

3 

3

3 

2 

4 

3 

4

3 

3 

3 

4 

3

3 

4 

3 

4 

2

4 

4 

1 

1 

4

4 

2 

3

4 

0

3 

4 

2

0.55 

0.69 

-0.25 

-0.91 

-2.06

-0.80 

-0.74 

-0.91 

0.53 

0.53

0.86 

-1.05 

-0.41 

-0.69 

-0.09

0.58 

0.86 

0.75 

0.14 

-0.52

-0.74 

0.09 

0.97 

0.25 

-1.29

-0.30 

0.25 

-1.95 

-1.57 

0.09

0.09 

1.30 

0.60 

-0.19 

6.86

-0.85 

0.47 

-1.40 150

186 

188 

171 

159 

138

161

159 

185

191 

168

186 

191 

189 

178

162 

177 

193 

180 

152

170 

180

147 

177

177 

199 

186

300

160

162 

185

156

163 

174

166

140

172

184

MPV;

F-pseudosigma :

N:

HIP

Hh

175

18

38

186

161

170
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)--Continued

Co (Cobalt)

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 3

100 158

190

16

147

249

169

6

8

117

170

141

24

Lab Rating Z-value

1

4 

5 

8 

11

16 

18 

25 

30.1 

42

46 

48 

85 

89 

100

105 

127 

134 

136 

141

146 

212 

215 

235 

246

247 

254 

283 

284

2 

2

4 

4 

2

2

4 

4 

4 

1

4 

0 

4 

4 

4

4 

4 

1 

0 

3

4 

0 

4 

1 

4

4 

4 

3 

0

1.25 

1.05 

0.03 

0.44 

-1.18

-1.32 

0.17 

0.37 

0.37 

-1.84

-0.10 

-3.20 

0.37 

-0.44 

0.44

0.17 

-0.24 

1.72 

5.70 

-0.78

-0.03 

-3.00 

0.37 

-1.92 

-0.47

0.07 

0.37 

-0.71 

-4.35 100

183 

180 

165 

171 

147

167 

170

163

170 

158 

171

161 

190 

249 

153

164 

170 

158

170

145

170 

137

117

167

120 

136

166 

154

MPV =

F-pseudosigma =

N =

Hu =

Hl =

165

13

29

170

153

171
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Cr (Chromium) jig/L

0. Other 

1 . AA: direct, air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 1 7

350 170 8

160

123

18

18

110

1995

121

16

8

86

125

99

18

Lab Rating Z-value

MPV = F-pseudosigma = N = Hu = Hl =120

18

35

136

111

1

4 

5 

8

11

16 

18 

25 

30.1 

34

42 

46 

48 

59 

69

85 

89 

100 

105 

127

134 

136 

140 

141 

146

149 

212 

215 

237 

241

246 

247 

254 

283 

284

3 

0 

2

4 

3

2

4 

4 

4 

3

2

4 

1 

2 

4

0 

3 

4 

4 

4

4 

0 

0 

4 

4

0 

1 

3 

3 

0

3

4 

3 

3 

0

0.80 

103.24 

1.32 

0.00 

-0.55

-1.05 

-0.33 

-0.22 

0.28 

-0.94

-1.18 

0.06 

-1.87 

-1.50 

0.00

2.20 

0.94 

-0.28 

0.28 

0.17

0.00 

4.07 

2.75 

-0.28 

-0.44

2.20 

-1.87 

0.72 

0.88 

-6.14

-0.57 

0.00 

0.55 

0.83 

12.66 350

135 

1995 

144 

120 

110

114 

116

103

121 

120

160 

137 

115

123

120 

194 

170 

115 

112

160

133 

136 

8

110

130 

135

101 

125

99

86 

93

125

86

120

172
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Cu (Copper)

0. Other 

1 . AA: direct, air 

3. AA: graphite furnace 

N = 

Minimum = 

Maximum = 

Median = 

F-pseudosigma =

Lab

1 

4 

5 

8 

11

12 

16 

18 

25 

30.1

42 

46 

48 

59 

69

85 

86 

89 

100 

105

127 

134 

136 

140 

141

146 

149 

212 

215 

235

237 

241 

246 

247 

253

254 

283 

284

Rating

4 

0 

3 

2 

2

2

4 

4 

2 

4

2

4 

4 

4 

3

3 

4 

3 

3 

4

1 

3 

0 

4 

2

4 

3 

3 

3 

3

3 

4 

4 

3 

3

4 

3 

4

Z-value

0.46 

2.92 

0.55 

-1.19 

-1.17

-1.42 

0.16 

-0.50 

1.37 

0.41

-1.21 

-0.14 

0.11 

-0.05 

0.75

0.91 

0.23 

0.69 

-0.80 

-0.16

-1.67 

0.70 

-2.93 

-0.05 

-1.49

-0.41 

0.64 

0.52 

0.98 

-0.59

0.68 

-0.25 

0.33 

-0.71 

-0.85

0.27 

-0.80 

0.05

4. ICP 

6. ICP/MS

1 8 2 22 

6140 5750 5500 4837 

6520 5860 7397 

6250 6192 

282 437

0134

7397 

6360 

5600 

5610

5500 

6192 

5900 

6720

6060

6100 

6450

6520 

6220 

6420 

5770

5390 

6425 

4837 

6100 

5470

5940 

6400 

6346 

6550 

5860

6416 

6010 

6264 

5810 

5750

6240 

5770 

6140

5 

5592 

6320

6

6320

6300

5592 

6170

6050

MPV= 6120

F-pseudosigma = 437

N= 38

Hu = 6360

HI = 5770

173
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Fe (Iron) mg/L

0. Other 6. ICP/MS

1. AA: direct, air

4. ICP

N =

Minimum =

Maximum =

Median -

F-pseudosigma =

1 6

179 167

194

27

19

209

188

14

2

186

215

Lab Rating Z-value

1

4 

5 

8 

11

16 

18 

25 

30.1 

30.2

43 

46 

48 

59 

69

85 

86 

89 

100 

105

127 

134 

140 

141 

146

212 

215 

235 

237 

241

246 

247 

254 

283 

284

4 

2 

4 

1 

0

2 

3 

0 

4 

4

4 

4 

0 

4 

4

4 

3 

4 

4 

2

4 

4 

1 

0 

3

4 

4 

1 

2 

3

2 

3 

4 

0 

3

0.00 

-1.33 

-0.49 

-1.56 

-3.70

-1.17 

-0.63 

-13.90 

-0.16 

0.41

0.41 

0.00 

2.22 

-0.03 

0.33

0.00 

0.57 

0.25 

-0.49 

-1.48

0.33 

0.32 

-1.72 

-2.41 

0.74

0.25 

-0.08 

1.72 

1.40 

0.53

-1.30 

0.57 

0.20 

-15.65 

-0.71

188 

172 

182 

169 

143

174 

180 

19 

186 

193

193 

188 

215 

188 

192

188 

195 

191 

182 

170

192 

192 

167 

159 

197

191 

187 

209 

205 

194

172 

195 

190 

0 

179

MPV =

F-pseudosigma =

N =

Hu =

Hl =

188

12

36

193

176

297 0.59 195

174
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

K (Potassium) mg/L

0. Other 

1. AA: direct, air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS 

12. Flame emission

1 10

3.70 3.10

3.80

3.53

0.07

18

2.22

4.80

3.58

0.39

1 1

3.78 3.93

Lab Rating Z-value

MPV'

F-pseudosigma : N =

HIT

Hh

3.58

0.23

31

3.72

3.41

12

1

4 

5 

8 

11

16 

18 

25 

43 

46

48 

59 

69 

85 

86

89 

100 

105 

127 

134

140 

141 

146 

149 

212

215 

241 

246 

247 

254

283 

284 

297

3 

0 

0 

3 

0

4 

2 

0 

1 

4

3 

3 

1 

4 

3

4 

4 

4 

0 

4

4 

0 

4 

4 

NR

0 

0 

3 

1 

4

4 

3 

3

-0.53 

5.39 

-6.01 

0.97 

-2.39

0.09 

-1.24 

3.40 

-1.68 

0.09

0.88 

0.97 

1.55 

-0.04 

-0.80

-0.27 

0.27 

0.00 

-3.36 

-0.21

0.09 

-2.17 

0.00 

-0.35

-11.22 

-2.12 

0.66 

2.03 

-0.35

0.31 

0.53 

-0.71

3.46

3.60

3.80 

3.57

3.52 

3.53

3.60 

3.50

3.10 

3.50

3.70

4.80 

2.22 

3.80 

3.04

3.30 

4.35 

3.20 

3.60

3.78 

3.93 

3.40

3.64 

3.58 

2.82

3.09 

3.58

<10

<1

3.73 

4.04

3.65 

3.42

175
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Li (Lithium)

1 . AA: direct, air 

4. ICP

6. ICP/MS

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

1 14

70.0 59.0

87.1

68.2

4.4

2

68.1

70.0

MPV =

F-pseudosigma =

Rating Criterion =

N =

Hu =

Hl =

68.3

2.0

3.4 **

17 

70.0 

67.3

Lab

1 

4 

5 

8 

11

25 

30.1 

69 

100 

105

127 

134 

141 

237 

246

247 

283

Rating

0 

2 

4 

0 

4

0 

4 

4 

4 

4

0 

4 

0 

0 

4

4 

3

Z-value

5.53 

-1.21 

0.00 

-2.44 

0.35

4.03 

0.50 

0.50 

-0.09 

0.50

-2.74 

-0.29 

-2.59 

2.26 

-0.24

-0.06 

0.56

1 4

87.1 

64.2 

68.3 

60.0 

69.5

82.0

70.0 

68.0 

70.0

59.0 

67.3 

59.5 

76.0 

67.5

70.2

6

70.0

68.1

176
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)--Continued

Mg (Magnesium) mg/L

150

100

0. Other

1. AA:

4. ICP

direct, air

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 8

120 106

134

128

6

25

106

141

124

9

2

121

138

Lab Rating Z-value

1

4 

5 

8

11

16 

18 

25 

30.1 

30.2

43 

46 

48 

59 

69

85 

86 

89 

100 

105

127 

134 

140 

141 

146

149 

212 

215 

237 

241

246 

247 

254 

283 

284

4 

4 

3 

3 

2

4 

2 

1 

4 

2

4 

4 

1 

3 

4

4 

3 

3 

0 

2

4 

4 

3 

1 

3

0 

3 

4 

2 

4

0 

2 

4 

4 

3

0.15 

-0.48 

-0.85 

-0.60 

-1.45

0.24 

-1.27 

1.94 

-0.48 

1.09

0.00 

0.12 

1.57 

0.73 

0.24

0.12 

0.97 

0.85 

-2.18 

-1.16

0.00 

-0.12 

-0.60 

-1.90 

-0.60

-2.30 

0.73 

0.48 

-1.09 

0.36

-2.34 

1.09 

0.36 

-0.36 

-0.64

126 

121 

118 

120 

113

127 

115 

141 

121 

134

125 

126 

138 

131 

127

126 

133 

132 

107 

115

125 

124 

120 

109 

120

106 

131 

129 

116 

128

106 

134 

128 

122 

120

MPV =

F-pseudosigma =

N =

Hu =

Hl =

125

8

36

130

119

297 1.69 139

177
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Mn (Manganese) mg/L

0. Other

1 . AA: direct, air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 6

105 11

111

25

87

113

104

7

4

94

116

Lab Rating Z-value

1

4 

5 

8 

11

16 

18 

25 

30.1 

42

43 

46 

48 

59 

69

85 

86 

89 

100 

105

127 

134 

140 

141 

146

149 

212 

215 

237 

241

246 

247 

254 

283 

284

4

0 

3 

3 

3

3 

3 

3 

4 

2

3 

4 

1 

4 

3

4 

3 

4

3 

1

1 

3 

4 

0 

3

0 

4 

4 

2 

4

0 

2 

4 

4 

4

-0.23 

-2.05 

-0.53 

-0.53 

-0.54

-0.72 

-0.83 

-0.95 

-0.38 

1.24

0.94 

0.50 

1.53 

0.31 

0.79

0.35 

0.65 

0.06 

-0.61 

-1.68

-1.63 

0.76 

0.06 

-2.75 

0.79

-13.94 

0.06 

-0.23 

1.01 

0.41

-2.51 

-1.23 

0.35 

0.06 

-0.06

104 

92 

102 

102 

102

101 

100 

99

112 

109

108 

111

108 

110 

106 

101

95 

111 

106 

87 

111

11 

106 

104 

113 

108

88 

97 

108 

106 

105

103 

114

116

94

MPV =

F-pseudosigma =

N =

Hu =

Hl =

106

7

36

110

100

297 0.93 112

178
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Mo (Molybdenum) jig/L

160

150

140

130 4-

120

110 -t

100

90

80 -

70

60 4-

50

-0 0-

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 2

354 117

134

15

44

339

105

15

7

26

138

118

18

Lab Rating Z-value

1 

4 

5 

8 

11

16 

18 

30.1 

42 

46

48 

100 

105 

127 

134

136 

141 

146 

215 

237

241 

246 

247 

283 

284

4 

3 

4 

4 

3

3 

0 

1 

0 

3

3 

4 

3 

1 

3

0 

3 

4 

3 

0

2 

4 

4 

3 

0

0.47 

-0.51 

0.05 

0.00 

-0.51

0.73 

2.46 

1.57 

-4.33 

0.84

0.84 

-0.26 

0.52 

-1.89 

-0.90

12.13 

-0.86 

0.00 

0.73 

-3.36

1.36 

-0.15 

-0.16 

-0.79 

12.91 354

117 

98 

109 

108 

98

155 

124

103

72 

91

339 

92 

108 

122 

44

134 

105

122

138 

26

124 

118

105 

93

F-pseudosigma =

Hu = 

Hl =

108

19

25

124

98

179
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)--Continued

Na (Sodium) mg/L

0. Other 

1 . AA: direct, air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS 

12. Flame emission

1 7

23.6 21.3

23.2

22.4

0.7

25

16.0

200.0

23.0

1.6

2

21.0

22.6

2

21.1

30.0

Lab Rating Z-value

MPV = 

F-pseudosigma =

Hl =

22.7

1.5

37

23.9

21.9

12

1

4 

5 

8 

11

12 

16 

18 

25 

30.1

30.2 

43 

46 

48 

59

69 

85 

86 

89 

100

105 

127 

134 

140 

141

146 

149 

212 

215 

237

241 

246 

247 

254 

283

284 

297

4 

3 

3 

2 

3

0 

0 

4 

2 

2

0 

0 

4 

4 

3

2 

3 

3 

4 

2

3 

0 

4 

4 

0

3 

4 

0 

4 

4

4 

4 

4 

4 

1

3 

0

-0.12 

-0.93 

0.62 

-1.47 

-0.53

119.60 

-4.51 

-0.46 

1.43 

-1.13

4.94 

-2.14 

0.01 

-0.05 

-0.93

-1.07 

-0.53 

0.96 

-0.19 

1.03

0.55 

-2.08 

0.00 

0.35 

28.88

0.82 

-0.46 

2.10 

0.22 

-0.26

0.22 

-0.28 

-0.26 

0.28 

1.70

0.59 

2.24

22.5 

21.3 

23.6 

20.5 

21.9

200.0 

16.0 

22.0 

24.8 

21.0

30.0 

19.5 

22.7 

22.6 

21.3

21.1 

21.9 

24.1 

22.4 

24.2

23.5 

19.6 

22.7 

23.2 

65.5

23.9 

22.0 

25.8 

23.0 

22.3

23.0 

22.3 

22.3 

23.1 

25.2

23.6 

26.0

180
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Ni (Nickel) jig/L

0. Other 

1 . AA: direct, air

3. AA: graphite furnace

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

4. ICP 

6. ICP/MS

1 3

26 260

360

3

40

400

18

157

392

270

11

10

48

295

272

58

Lab Rating Z-value

1

4

5 

8 

11

16 

18 

25 

30.1 

42

46 

48 

59 

69 

85

89 

100 

105 

127 

134

136 

140 

141 

146 

149

212 

215 

235 

237 

241

246 

247 

253 

254 

283

4 

3 

4 

0 

1

4 

4 

0 

4 

0

4 

0 

3 

0 

4

4 

1 

3 

4 

4

0 

4 

0 

4 

0

2 

4 

0 

1 

0

4 

2 

0 

4 

4

0.46 

-0.60 

0.14 

-4.91 

-1.65

-0.23 

-0.05 

-10.00 

0.50 

-10.15

0.00 

-3.85 

0.86 

3.44 

0.05

0.00 

1.84 

0.83 

-0.37 

0.23

5.64 

-0.41 

-5.14 

0.09 

6.01

1.09 

-0.09 

-2.75 

1.88 

-10.50

0.30 

1.19 

4.18 

-0.41 

-0.37

256 

272 

162 

233

268 

<49

269

344 

270

269 

309

261 

274

392 

260 

157 

271 

400

293 

267

310 

40

276

360 

260

279

264

280 

48

185 

288

287

209

295 

261

MPV;

F-pseudosigma : N;

HIP

Hh

269

22

35

287

258

284 -11.15 26

181
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Pb (Lead) ,ig/L

0. Other 4. 

1. M: direct, air 6.

3. M: graphite furnace

N= 1

Minimum = 30.0

Maximum =

Median =

F-pseudosigma =

ICP 

ICP/MS

1 15

10.0 12.9

59.1

32.4

7.9

4

41.5

475.0

9

27.0

38.0

35.1

2.2

Lab Rating Z-value

F-pseudosigma : N:

HIT 

HI'

33.5

7.6

30

37.9

27.7

1

4 

5 

8 

12

16 

18 

25 

30.1 

42

46 

48 

59 

69 

89

100 

105 

127 

134 

136

140 

141 

146 

212 

215

235 

237 

241 

246 

247

253 

254 

283 

284 

297

4 

2 

4 

NR

1

4 

4 

NR 

4

3

3 

4 

4 

2 

0

4 

3 

4 

3 

0

0 

1 

0 

4 

1

4 

NR 

0 

NR 

4

0 

NR 

3 

4 

0

-0.25 

1.06 

-0.15

-1.52

0.46 

0.33

0.07 

0.58

0.57 

0.20 

0.21 

-1.04 

-2.72

-0.07 

-0.86 

-0.08 

-0.77 

58.28

-3.10 

1.80 

2.09 

-0.46 

-1.91

-0.07 

3.38 

0.40

-2.55

0.59 

-0.46 30.0 

2.79

31.6 

41.5 

32.4 

<50 

22.0

36.0 

<71

37.8

25.6 

12.9

33.0

32.9 

27.7 

475.0

10.0 

47.1 

49.3

19.0

33.0 

<25 

59.1 

<60

14.2 

< 100

54.6

37.0

34.0 

37.9

35.0 

35.1

27.0

30.0

36.5

38.0

182
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)~Continued

Sb (Antimony)

5.50

11na

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

11na.AA: hydride NaBH4

1518

2.00 1.00 265.00 2.40

4.40 4.00

2.77

0.24

1

2.20

Lab Rating Z-value

MPV'

F-pseudosigma :

N = HIP

Hh

2.77

0.89

16

3.50

2.30

11na

5 

8 

16 

18 

25

30.1 

42 

48 

59 

69

89 

100 

105 

127 

134

141 

146 

212 

215 

241

246 

247 

283

NR 

3 

2 

1 

NR

4 

NR 

4 

4 

NR

NR 

4 

4 

1 

2

0 

NR 

4 

NR

1

NR 

4 

4

-0.64 

1.38 

-1.99

-0.08

0.26 

-0.19

0.26 

-0.06 

1.71 

-1.07

294.79 

-0.42 

1.83

0.21 

0.06

<20 

2.20 

4.00 

1.00

2.70 

<3 

3.00 

2.60 

<5

3.00 

2.72 

4.29 

1.82

265.00 

<50 

2.40 

<7 

4.40

<85 

2.96 

2.82

183
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Se (Selenium) |ug/L

30.0

20.0

10.0

0.0

11na

0.

3.

4.

Other

AA: graphite furnace

ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

11na.M: hydride NaBH4

1324

2.0 0.0 40.0 2.6

14.0 806.0 63.0

1

0.1

MPV = insufficient data 

N= 11

Lab

1 

5 

8

11 

16

18 

25 

30.1 

42 

48

59 

69 

89 

100 

105

127 

134 

136 

141 

146

212 

215 

241 

246 

247

283 

284

Rating

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR 

NR 

NR 

NR

NR 

NR

Z-value

-0.27 

1.90 

3.15

0.00 

-0.13

-0.27 

0.49

-0.14 

43.54

0.23

-0.16

034

<2

40.0

<1 

<129

0.0 

<5

14.0

<3 

2.4 

806.0 

<2 

<10

<7 

<5 

<80

2.0

6

63.0

5.0 

2.6 

<0.4

<7

9.3 

<5

<5

11na

<1 

0.1

<2

184
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Si02 (Silica) mg/L

65.0

60.0

-X-22mb -X-22s

0. Other 22mb. Color: molybdate blue 

2. AA: direct, nitrous oxide 22s. Color: sulfonic acid

4. ICP

N= 1

Minimum = 46.1

Maximum =

Median =

F-pseudosigma =

1 16

49.3 45.7

109.0

53.4

3.4

3

48.6

77.7

1

50.7

MPV'

F-pseudosigma : N = HIP

Hh

52.3

3.3

22

55.2

50.7

Lab Rating Z-value 22mb 22s

1 

4 

5 

8

11

25 

43 

89 

100 

105

127 

134 

140 

212 

215

237 

241 

246 

247 

254

283 

284

4 

4 

4 

4 

1

0 

4 

4 

1 

3

4 

3 

2 

3 

2

4 

3 

2 

0 

4

0 

1

-0.34 

-0.28 

0.04 

-0.10 

-1.96

17.01 

-0.04 

-0.46 

1.87 

0.64

-0.46 

0.88 

-1.11 

0.52 

-1.24

0.46 

-0.88 

1.27 

7.63 

0.22

2.29 

-1.84 46.1

51.1 

51.3 

52.4 

51.9 

45.7

109.0 

52.1 

50.7 

58.5 

54.4

50.7 

55.2 

48.6 

54.0 

48.1

53.8 

49.3 

56.5 

77.7 

53.0

59.9

185
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Sr (Strontium) jig/L

0. Other 

4. ICP

6. ICP/MS

N= 1

Minimum = 2596

Maximum =

Median =

F-pseudosigma =

19

1240

1870

1471

59

2

1413

1500

Lab Rating Z-value

MPV = 1473

F-pseudosigma = 64

N= 22

Hu= 1500

Hl= 1413

1

4 

5 

8 

11

16 

18 

25 

30.1 

85

86 

100 

105 

127 

134

235 

237 

246 

247 

254

283 

284

3 

0 

3 

0 

4

1 

2 

1 

4 

4

4 

4 

4 

0 

4

0 

4 

2 

3 

4

3

0

-0.93 

3.27 

0.73 

-3.15 

-0.03

-1.74 

-1.44 

1.97 

0.42 

0.11

-0.05 

0.03 

-0.36 

-3.61 

0.25

6.16 

0.22 

-1.12 

-0.67 

0.26

-0.82 

17.41 2596

1413 

1684 

1520 

1270 

1471

1361 

1380 

1600 

1500 

1480

1470 

1475 

1450 

1240 

1489

1870 

1487 

1401 

1430 

1490

1420

186
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)--Continued

V (Vanadium) jig/L

-o m 3

0. Other

3. AA: graphite furnace

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

6. ICP/MS

1 2

170 13

207

19

51

330

116

12

8

88

125

108

22

Lab Rating Z-value

1

4 

5 

8 

11

16 

18 

25 

30.1 

42

46 

48 

86 

89 

100

105 

127 

134 

136 

141

146 

212 

215 

235 

237

241 

246 

247 

283 

284

4 

2

3 

3 

3

3 

3 

0 

4 

2

4

1 

0 

0 

3

3 

2 

4 

3 

3

4

1 

0 

4 

1

0 

4 

4 

3 

0

-0.46 

1.07 

-0.55 

-0.68 

-0.55

-0.75 

0.53 

-4.39 

0.39 

-1.18

0.19 

-1.90 

5.12 

6.13 

-0.55

0.60 

-1.22 

-0.01 

1.00 

0.53

0.26 

-1.90 

14.42 

-0.35 

-1.63

-6.94 

0.01 

0.46 

0.60 

3.63

109 

132 

108 

106 

108

124 

51

119

192 

207 

108

98 

116 

131 

124

120 

330 

92

13 

116

125 

170

105

122 

99

88

125

88 

111

123

MPV =

F-pseudosigma =

N =

Hu =

Hl =

116

15

30

125

105

187
Table 21. Statistical summary of reported data for standard reference sample AMW-4 (acid mine water constituents)-Continued

Zn (Zinc) mg/L

64.0

0. Other 6. ICP/MS

1. AA: direct, air

4. ICP

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab

1

4

5

8

11

16

18

25

30.1

42

46

48

59

69

86

89

100

105

127

134

140

141

146

212

215

237

241

246

247

253

254

283

284

Rating

4

4

3

2

0

4

2

2

4

4

2

3

3

4

3

4

4

3

4

4

4

1

2

4

4

2

2

2

3

3

3

1

2

Z-value

0.41

0.00

-0.64

-1.46

-3.72

-0.45

-1.02

-1.05

0.02

-0.16

1.18

0.96

0.77

0.33

0.99

0.02

-0.42

-0.86

-0.30

0.41

0.33

1.91

1.15

-0.05

-0.30

1.49

1.46

-1.18

-0.58

0.65

0.71

1.52

-1.02

1 6 20

50700 54000 60

58600 58800

53000

4448

0 1 4

53.9

51.9

49.3

42.1

50.7

50.6

57.7

56.4

55.0

57.1

54.0

52.6

53.0

55.2

55.0

59.8

57.6

53.8

53.0

58.7

58.6

50.2

52.1

56.0

56.2

58.8

50.7

6

51200

57000

6

55.2

52.5

54.0

53.4

57.0

51.2

MPV =

F-pseudosigma =

N =

Hu =

Hl =

54.0

3.2

33

56.2

51.9

188
Table 22. Statistical summary of reported data for standard reference sample Hg-25 (mercury)

Definition of analytical methods, abbreviations, and symbols_____________________________

Analytical methods

0 Other/Not reported

6 ICP/MS = inductively coupled plasma / mass spectrometry

8 AA: cold vapor = atomic absorption: cold vapor

9 Atomic fluorescence

Abbreviations and symbols

N = number of analyses~(excluding less than values)

MPV = most probable value

F-pseudosigma = nonparametric statistic deviation

Hu = upper hinge value

HI = lower hinge value

)j,g/L = micrograms per liter

Lab » laboratory code number

NR = not rated, less than value reported or insufficient data

< = less than

Constituent page 

Hg Mercury 190

189
Table 22. Statistical summary of reported data for standard reference sample Hg-25 (mercury)-Continued

Hg (Mercury) |ig/L

0. Other

6. ICP/MS

8. AA: cold vapor

N =

Minimum =

Maximum =

Median =

F-pseudosigma =

Lab Rating Z-value

1 4 0.37

3 4 -0.46

8 1 -1.70

10 2 1.20

11 4 0.21

12 0 4.52

13 4 0.17

15 4 0.12

16 4 -0.25

18 0 2.37

26 4 0.33

32 0 -2.41

34.1 2 -1.45

34.2 2 1.08

39 0 3.28

46 0 2.45

48 2 -1.29

51 1 -1.78

59 1 -1 .70

68 2 -1.45

69 4 0.00

70 0 3.20

76 0 -2.67

86 3 -0.58

87 4 -0.46

89 3 -0.54

96 3 0.91

97 0 3.53

100 0 2.91

- 105 4 0.37

107 3 0.79

119 4 -0.25

127 4 0.12

134 3 0.58

136 3 -0.71

138 4 -0.08

141 2 -1.45

142 4 -0.37

145 4 -0.42

146 4 -0.04

147 2 -1.12

149 3 0.79

151 2 -1.49

193 4 -0.46

204 2 1 .20

212 3 0.79

213 4 -0.46

215 4 0.33

217 4 -0.37

220 4 -0.04

9. Atomic fluorescence

3 2 52

1.83 1.77 1.63

2.50 2.05 40.10

2.45

0.24

068

2.50

2.30

2.00

2.70

2.46

3.50

2.45

2.44

2.35

2.98

2.49

1.83

2.67

3.20

3.00

1.98

2.00

2.06

2.41

3.18

1.77

2.27

2.30

2.28

2.63

3.26

3.11

2.50

2.60

2.35

2.44

2.55

2.24

2.39

2.06

2.32

2.31

2.40

2.60

2.05

2.30

2.70

2.60

2.30

2.49

2.32

2.40

4

2.06

2.50

9

2.06

2.10

2.14

MPV =

F-pseudosigma =

N =

Hu =

Hl =

2.41

0.24

61

2.60

2.28

Lab Rating Z-value

221 

234 

235 

247 

255

283 

284 

292 

297 

298

4 

1 

3 

4 

0

0 

0 

4 

3 

4

0.00 

-1.70 

0.87 

-0.33 

156.44

2.86 

-3.24 

-0.04 

0.54 

0.35 2.50

2.41 

2.00 

2.62 

2.33 

40.10

3.10 

1.63 

2.40 

2.54

304 0.37 2.50

190
Table 23. Most probable values for constituents and properties in standard reference samples distributed in September 1997

(MPV, most probable value; N, number of samples; |xg/L, microgram per liter; mg/L, milligram per liter; \iSlcm, microsiemens per centimeter at 25 degrees Celsius.)

T-151 (trace constituents)

Analvte MPV F-pseudosiqma

Ag 11.1 ug/L 1.0

Al insuff data

As 1.01 ug/L 0.39

B 36.3 ug/L 4.6

Ba 40.7 ug/L 1.7

Be 25.6 ug/L 1.6

Ca 37.9 mg/L 1.4

Cd 26.8 ug/L 1.6

Co insuff data

Cr 30.1 ug/L 2.2

Cu 33.0 ug/L 2.5

Fe 10.0 ug/L 4.4

K 1.95 mg/L 0.13

Li 27.6 ug/L 2.1

f\/M4'4 (major constituents)

Analvte MPV F-pseudosiqma

Ikalinity as CaCO3 88.8 mg/L 3.7

B 46.1 ug/L 7.3

Ca 74.0 mg/L 3.2

Cl 77.0 mg/L 3.2

DSRD 546 mg/L 14

F 0.23 mg/L 0.04

K 3.60 mg/L 0.26

Mg 17.0 mg/L 0.6

N-55 (nutrient constituents)

Analvte MPV F-pseudosigma

NH3 as N 0.240 mg/L 0.024

NH3+OrgNasN 0.300 mg/L 0.110

NO3+NO2 as N 0.443 mg/L 0.033

total P as P 0.602 mg/L 0.032

PO4 as P 0.580 mg/L 0.026

P-29 '(low ionic strength constituents)

Analvte MPV F-pseudosiqma

Acidity 5.70 mg/L 3.85

Ca 1.84 mg/L 0.14

Cl 0.20 mg/L 0.18

F 0.056 mg/L 0.028

K 0.37 mg/L 0.04

Mg 0.57 mg/L 0.02

N

68

43

30

45

73

64

88

85

21

82

87

43

76

33

N

91

45

95

98

64

69

82

95

N

69

40

75

61

66

N

17

48

35

29

35

48

Analvte

Mg

Mn

Mo

Na

Ni

Pb

Sb

Se

SiO2

Sr

Tl

U

V

Zn

Analvte

Na

total P as P

pH

SiO2

SO4

Sp Cond

Sr

V

Analvte

NH3 as N

NH3+OrgN as N

NO3+NO2 as N

total P as P

PC-4 as P

Analvte

Na

pH

PO4 as P

SO4

Sp Cond

MPV F-pseudosiqma

17.5 mg/L 0.6

13.0 ug/L 1.1

29.6 ug/L 1.9

55.0 mg/L 1 .6

10.0 ug/L 1.7

19.8 ug/L 2.3

26.8 ug/L 2.0

1.80 ug/L 1.39

1.43 mg/L 0.10

387 ug/L 16

62.0 ug/L 6.3

15.0 ug/L 0.6

59.0 ug/L 4.3

6.57 ug/L 2.24

MPV F-pseudosiqma

77.7 mg/L 2.8

0.030 mg/L 0.011

8.40 0.17

7.43 mg/L 0.50

210 mg/L 8

853 uS/cm 21

673 ug/L 27

insuff data

N-56 (nutrient constituents)

MPV F-pseudosiqma

0.498 mg/L 0.034

0.750 mg/L 0.097

0.747 mg/L 0.064

0.715 mg/L 0.035

0.658 mg/L 0.030

MPV F-pseudosiqma

0.66 mg/L 0.06

6.85 0.21

0.046 mg/L 0.012

1.10 mg/L 0.23

19.2 uS/cm 0.9

N

88

82

53

85

59

76

50

19

51

49

46

11

59

56

N

91

56

97

67

91

93

48

23

N

68

44

76

60

69

N

46

52

34

38

47

GWt-2 '(iground-water trace constituents)

Analvte MPV F-pseudosigma

Ag 34.1 ug/L 5.2

Al 50.0 ug/L 14.1

As 1.30 ug/L 0.37

B 242 ug/L 13

Ba 167 ug/L 8

Be 9.00 ug/L 0.82

Ca 72.6 mg/L 2.7

Cd 13.0 ug/L 0.8

Co insuff data

Cr 27.6 ug/L 3.0

Cu 28.4 ug/L 2.7

Fe 0.049 mg/L 0.005

K 4.60 mg/L 0.27

N

47

42

25

37

55

47

63

57

19

57

59

53

57

GWtvl-2 (ground-waiter major constituents)

Analvte MPV F-pseudosigma N

Alkalinity 253 mg/L 9

B 238 ug/L 14

Ca 68.4 mg/L 2.5

Cl 48.9 mg/L 2.0

DSRD 602 mg/L 14

F 1.18 mg/L 0.09

K 4.46 mg/L 0.40

ATMWI4 (acid mjne wa'te'r constituents)

Analvte MPV F-pseudosiqma

Ag 69.0 ug/L 11.3

Al 29200 ug/L 1760

As 168 ug/L 30

B insuff data

Ba 9.23 ug/L 3.60

Be 38.0 ug/L 3.3

Ca 338 mg/L 28

Cd 175 ug/L 18

Co 165 ug/L 13

Cr 120 ug/L 18

Cu 6120 ug/L 437

Fe 188 mg/L 12

K 3.58 mg/L 0.23

Hg-25 (mercury)'

Analvte MPV F-pseudosiqma

Hg 2.41 ug/L 0.24

52

35

57

56

37

44

52

N

31

34

29

16

25

30

37

38

29

35

38

36

31

N

61

Analvte

Li

Mg

Mn

Mo

Na

Ni

Pb

Sb

Se

SiO2

Sr

V

Zn

Analvte

Mg

Na

total P as P

SiO2

SO4

Sp Cond

Analvte

Li

Mg

Mn

Mo

Na

Ni

Pb

Sb

Se

Si02

Sr

V

Zn

MPV F-pseudosiqma

19.2 ug/L 1.6

14.2 mg/L 0.3

307 ug/L 17

37.8 ug/L 3.5

115 mg/L 4

6.92 ug/L 2.08

150 ug/L 8

24.1 ug/L 3.3

insuff data

26.9 mg/L 1.6

810 ug/L 27

6.56 ug/L 3.90

363 ug/L 16

MPV F-pseudosiqma

14.0 mg/L 0.4

117 mg/L 5

0.20 mg/L 0.03

26.7 units 1.8

93.6 mg/L 4.0

934 u.S/cm 26

MPV F-pseudosiqma

68.3 ug/L 2.0

125 mg/L 8

106 mg/L 7

108 ug/L 19

22.7 mg/L 1.5

269 ug/L 22

33.5 ug/L 7.6

2.77 ug/L 0.89

insuff data

52.3 mg/L 3.3

1473 mg/L 64

116 ug/L 15

54.0 ug/L 3.2

N

19

64

62

38

61

37

60

38

25

38

33

33

54

N

57

56

40

38

57

52

N

17

36

36

25

37

35

30

16

11

22

22

30

33

191