U.S. Department of the Interior

U.S. Geological Survey

Data Series 1056

In cooperation with the California State Water Resources Control Board

Geochemical Data for Water, Streambed Sediment, and

Fish Tissue from the Sierra Nevada Mercury Impairment 

Project, 2011–12
Cover. A, Photograph showing South Yuba River above Langs Crossing near Emigrant Gap. Photograph taken by Jacob Fleck, 

 U.S. Geological Survey.

B, Photograph showing South Yuba River below Poorman Creek near Washington. Photograph taken by Jacob Fleck, 

 U.S. Geological Survey.

C, Photograph showing Rainbow Trout. Photo taken by Darrell Slotton and Shaun Ayers, University of Calfornia, Davis.

D, Photograph showing South Yuba River above Langs Crossing near Emigrant Gap. Photograph taken by Jacob Fleck, 

 U.S. Geological Survey.

E, Photograph showing South Yuba River above Langs Crossing near Emigrant Gap. Photograph taken by Jacob Fleck, 

 U.S. Geological Survey.

A

B

C

D

E
Geochemical Data for Water, Streambed 

Sediment, and Fish Tissue from the 

Sierra Nevada Mercury Impairment 

Project, 2011–12

By Elizabeth B. Stumpner, Charles N. Alpers, Mark Marvin-DiPasquale, 

Jennifer L. Agee, Evangelos Kakouros, Michelle R. Arias, Le H. Kieu, 

David A. Roth, Darrell G. Slotton, and Jacob A. Fleck

In cooperation with the California State Water Resources Control Board

Data Series 1056

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

RYAN K. ZINKE, Secretary

U.S. Geological Survey

James F. Reilly II, Director

U.S. Geological Survey, Reston, Virginia: 2018

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Suggested citation:

Stumpner, E.B., Alpers, C.N., Marvin-DiPasquale, M., Agee, J.L., Kakouros, E., Arias, M.R., Kieu, L.H., Roth, D.A., 

Slotton, D.G., and Fleck, J.A., 2018, Geochemical data for water, streambed sediment, and fish tissue from the 

Sierra Nevada Mercury Impairment Project, 2011–12: U.S. Geological Survey Data Series 1056, 133 p., 

https://doi.org/10.3133/ds1056.

ISSN 2327-638X (online)
iii

Contents

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

Introduction.....................................................................................................................................................1

Purpose and Scope ..............................................................................................................................2

Study Design..........................................................................................................................................2

Methods...........................................................................................................................................................7

Sample Collection and Processing Methods...................................................................................7

Surface Water..............................................................................................................................7

Bed Sediment ...............................................................................................................................7

Fish Tissue.....................................................................................................................................7

Analytical Methods and Quality Assurance.....................................................................................7

Water ...........................................................................................................................................8

Total Mercury ......................................................................................................................8

Methylmercury....................................................................................................................8

Total Suspended Solids......................................................................................................9

Organic Carbon ..................................................................................................................9

Absorbance and Fluorescence Spectral Indicators.....................................................9

Total Particulate Carbon and Nitrogen............................................................................9

Nutrients...............................................................................................................................9

Alkalinity...............................................................................................................................9

Chlorophyll a and Pheophytin a........................................................................................9

Anions ................................................................................................................................10

Suspended Sediment Concentration.............................................................................10

Cations and Trace Elements............................................................................................10

Bed Sediment .............................................................................................................................10

Total Mercury ....................................................................................................................10

Methylmercury..................................................................................................................11

Reactive Mercury .............................................................................................................11

Iron Species.......................................................................................................................11

Total Reduced Sulfur........................................................................................................11

Organic Content by Loss on Ignition..............................................................................11

Bulk Density, Dry Weight, and Porosity.........................................................................11

Sediment Grain Size .........................................................................................................11

Trace Elements and Major Elements.............................................................................12

Fish Tissue...................................................................................................................................12

Mercury..............................................................................................................................12

Selenium.............................................................................................................................13

Results ...........................................................................................................................................................13

Water ..................................................................................................................................................13

Bed Sediment ......................................................................................................................................13

Fish Tissue............................................................................................................................................13

References Cited..........................................................................................................................................82

Appendix 1. Analytical Methods Used for Water, Sediment, and Fish Tissue...................................85

References Cited.................................................................................................................................87
iv

Appendix 2. Quality-Assurance Data for Surface Water......................................................................89

References Cited...............................................................................................................................116

Appendix 3. Quality-Assurance Data for Sediment .............................................................................117

Appendix 4. Quality-Assurance Data for Fish Tissue...........................................................................131

Contents—Continued

Figures

1. Map showing location of Sierra Nevada Mercury Impairment Project sites for 

water, bed sediment, and fish. Discrete samples collected in 2011–12 across the 

Sierra Nevada foothills ................................................................................................................3

Tables

1. Location, date, and time of environmental water, sediment, and fish samples.................4

2. Location, date, and time of water and sediment replicates and water blanks..................6

3. Surface-water field measurements, laboratory alkalinity, and suspended 

sediment concentration.............................................................................................................14

4. Surface-water concentrations of mercury, methylmercury, and 

total suspended solids ...............................................................................................................17

5. Surface-water concentrations of dissolved and particulate organic matter, 

particulate inorganic carbon, total particulate nitrogen, chlorophyll, 

and pheophytin............................................................................................................................19

6. Absorbance spectral indicators of dissolved organic matter composition in 

surface water..............................................................................................................................20

7. Fluorescence spectral indicators of dissolved organic matter composition in 

surface water..............................................................................................................................22

8. Surface-water concentration of nitrogen species ...............................................................24

9. Surface-water concentrations of phosphorus species, sulfate, and chloride ................25

10A. Surface-water concentrations of selected cations and trace elements..........................26

10B. Surface-water concentrations of selected cations and trace elements..........................30

10C. Surface-water concentrations of selected cations and trace elements..........................34

10D. Surface-water concentrations of selected cations and trace elements..........................38

10E. Surface-water concentrations of selected cations and trace elements..........................42

11. Sediment data for concentrations of mercury, methylmercury, 

reactive mercury, iron species, and total reduced sulfur in sediment less than 

2 millimeters in diameter ...........................................................................................................46

12. Sediment data for concentrations of total mercury, iron species, and 

total reduced sulfur in sediment less than 0.063 millimeters in diameter.........................48

13. Sediment data for grain-size distribution ...............................................................................50

14A. Data for trace elements and major elements in sediment less than 

0.063 millimeter in diameter ......................................................................................................51

14B. Data for trace elements and major elements in sediment less than 

0.063 millimeter in diameter ......................................................................................................53

14C. Data for trace elements and major elements in sediment less than 

0.063 millimeter in diameter ......................................................................................................55

14D. Data for trace elements and major elements in sediment less than 

0.063 millimeter in diameter ......................................................................................................57
v

14E. Data for trace elements and major elements in sediment less than 

0.063 millimeter in diameter ......................................................................................................59

15. Mean and standard deviation of fish tissue mercury concentrations and 

total length by species and sampling location ......................................................................61

16. Fish length, weight, and mercury concentration in tissue for individual samples ..........62

17. Selenium concentrations in fish tissue...................................................................................79

1–1. Analytical methods used for the determination of constituents in water by the 

U.S. Geological Survey National Water Quality Laboratory, 

National Research Program, and additional laboratories ...................................................85

1–2. Analytical methods used for the determination of constituents in sediment and 

particulates by the U.S. Geological Survey National Water Quality Laboratory, 

National Research Program, and additional laboratories ...................................................86

1–3. Analytical methods used for the determination of constituents in fish.............................86

2–1A. Quality-assurance data for surface-water total mercury (filtered), 

standard reference material and matrix spike ......................................................................89

2–1B. Quality-assurance data for surface-water total mercury (filtered), 

equipment blanks........................................................................................................................89

2–1C. Quality-assurance data for surface-water total mercury (filtered), field replicates ......89

2–2A. Quality-assurance data for surface-water total mercury (particulate), 

standard reference material and matrix spike ......................................................................90

2–2B. Quality-assurance data for surface-water total mercury (particulate), 

equipment blanks........................................................................................................................90

2–2C. Quality-assurance data for surface-water total mercury (particulate), 

field replicates.............................................................................................................................90

2–3A. Quality-assurance data for surface-water methylmercury (filtered), 

standard reference materials and matrix spikes ..................................................................91

2–3B. Quality-assurance data for surface-water methylmercury (filtered), 

equipment field blanks...............................................................................................................91

2–3C. Quality-assurance data for surface-water methylmercury (filtered), 

field replicates.............................................................................................................................91

2–4A. Quality-assurance data for surface-water methylmercury (particulate), 

standard reference materials and matrix spikes ..................................................................92

2–4B. Quality-assurance data for surface-water methylmercury (particulate), 

equipment blanks........................................................................................................................92

2–4C. Quality-assurance data for surface-water methylmercury (particulate), 

field replicates.............................................................................................................................92

2–5. Quality-assurance data for replicate analyses of surface-water 

total suspended solids ...............................................................................................................93

2–6A. Quality-assurance data for surface-water dissolved organic carbon, 

standard reference materials, lab duplicates, and matrix spikes ......................................94

2–6B. Quality-assurance data for surface-water dissolved organic carbon, 

equipment blanks........................................................................................................................95

2–6C. Quality-assurance data for surface-water dissolved organic carbon, 

field replicates.............................................................................................................................95

2–7A. Quality assurance data for surface-water absorbance spectral indicators, 

equipment blanks........................................................................................................................95

Tables—Continued
vi

2–7B. Quality assurance data for surface-water absorbance spectral indicators, 

field replicates.............................................................................................................................96

2–8A. Quality assurance data for surface-water fluorescence spectral indicators, 

equipment blanks........................................................................................................................96

2–8B. Quality assurance data for surface-water fluorescence spectral indicators, 

field replicates.............................................................................................................................97

2–8C. Quality-assurance data for surface-water fluorescence spectral indicators, 

field replicates.............................................................................................................................97

2–9A. Quality-assurance data for surface-water total particulate carbon and nitrogen, 

equipment blanks........................................................................................................................98

2–9B. Quality-assurance data for surface-water total particulate carbon and nitrogen, 

field replicates.............................................................................................................................98

2–10A. Quality-assurance data for surface-water organic nitrogen plus ammonia 

(unfiltered), equipment blanks..................................................................................................98

2–10B. Quality-assurance data for surface-water organic nitrogen plus ammonia 

(unfiltered), field replicates.......................................................................................................98

2–11A. Quality-assurance data for surface-water organic nitrogen plus ammonia 

(filtered), equipment blanks ......................................................................................................99

2–11B. Quality-assurance data for surface-water organic nitrogen plus ammonia 

(filtered), field replicates ...........................................................................................................99

2–12A. Quality-assurance data for surface-water nitrate plus nitrite (filtered), 

equipment blanks........................................................................................................................99

2–12B. Quality-assurance data for surface-water nitrate plus nitrite (filtered), 

field replicates.............................................................................................................................99

2–13A. Quality-assurance data for surface-water ammonia (filtered), equipment blanks.......100

2–13B. Quality-assurance data for surface-water ammonia (filtered), field replicates............100

2–14A. Quality-assurance data for surface-water nitrite (filtered), equipment blanks.............100

2–14B. Quality-assurance data for surface-water nitrite (filtered), field replicates..................100

2–15A. Quality-assurance data for surface-water total phosphorus (unfiltered), 

equipment blanks......................................................................................................................101

2–15B. Quality-assurance data for surface-water total phosphorus (unfiltered), 

field replicates...........................................................................................................................101

2–16A. Quality-assurance data for surface water total phosphorus (filtered), 

equipment blanks......................................................................................................................101

2–16B. Quality-assurance data for surface water total phosphorus (filtered), 

field replicates...........................................................................................................................101

2–17A. Quality-assurance data for surface-water orthophosphate (filtered), 

equipment blanks......................................................................................................................102

2–17B. Quality-assurance data for surface-water orthophosphate (filtered), 

field replicates...........................................................................................................................102

2–18A. Quality-assurance data for surface-water alkalinity, equipment blanks........................102

2–18B. Quality-assurance data for surface-water alkalinity, field replicates.............................103

2–19. Quality-assurance data for chlorophyll and pheophytin, field replicates.......................103

2–20A. Quality-assurance data for surface-water sulfate, field blanks.......................................103

2–20B. Quality-assurance data for surface-water sulfate, field replicates ................................103

Tables—Continued
vii

2–21A. Quality-assurance data for surface-water chloride, field blanks ....................................104

2–21B. Quality-assurance data for surface-water chloride, field replicates..............................104

2–22A. Quality-assurance data for surface-water suspended sediment concentration, 

field blanks.................................................................................................................................104

2–22B. Quality-assurance data for surface-water suspended sediment concentration, 

field replicates...........................................................................................................................105

2–23A. The 2011 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................106

2–23B. The 2011 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................107

2–23C. The 2011 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................108

2–23D. The 2011 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................109

2–23E. The 2011 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................110

2–24A. The 2012 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................111

2–24B. The 2012 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................112

2–24C. The 2012 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................113

2–24D. The 2012 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................114

2–24E. The 2012 quality-assurance data for selected cations and trace elements in 

surface water, surface-water replicates, standard reference material, 

equipment blanks, and matrix spikes ....................................................................................115

3–1A. Quality-assurance data for total mercury in sediment, 

standard reference material and matrix spike ....................................................................117

3–1B. Quality-assurance data for total mercury in sediment, lab duplicates ...........................117

3–2A. Quality-assurance data for methylmercury in sediment, 

standard reference materials and matrix spikes ................................................................118

3–2B. Quality-assurance data for methylmercury in sediment, lab duplicates ........................118

3–3A. Quality-assurance data for reactive mercury in sediment, analytical blank .................119

3–3B. Quality-assurance data for reactive mercury in sediment, lab duplicates ....................119

3–4A. Quality-assurance data for ferrous iron in sediment, matrix spike..................................119

3–4B. Quality-assurance data for ferrous iron in sediment, lab duplicates ..............................119

Tables—Continued
viii

3–5A. Quality-assurance data for crystalline ferric iron in sediment, matrix blank 

and matrix spike........................................................................................................................120

3–5B. Quality-assurance data for crystalline ferric iron in sediment, lab duplicates..............120

3–6A. Quality-assurance data for amorphous ferric iron in sediment, matrix blank 

and matrix spike........................................................................................................................120

3–6B. Quality-assurance data for amorphous ferric iron in sediment, lab duplicates ............120

3–7A. Quality-assurance data for total reduced sulfur in sediment, analytical blank 

and matrix spike........................................................................................................................121

3–7B. Quality-assurance data for total reduced sulfur in sediment, lab duplicates................121

3–8. Quality-assurance data for loss on ignition in sediment, lab duplicates ........................121

3–9. Quality-assurance data for percent dry weight ..................................................................122

3–10. Quality-assurance data for bulk density...............................................................................122

3–11. Quality-assurance data for porosity......................................................................................123

3–12. Quality-assurance data for less than 2 millimeters grain-size distribution 

determined by laser diffraction ..............................................................................................123

3–13. Data for grain-size distribution in sediment determined by laser diffraction; 

phi classification.......................................................................................................................124

3–14A. The 2011 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................125

3–14B. The 2011 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................125

3–14C. The 2011 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................126

3–14D. The 2011 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................126

3–14E. The 2011 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................127

3–15A. The 2012 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................127

3–15B. The 2012 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................128

3–15C. The 2012 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................128

3–15D. The 2012 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................129

3–15E. The 2012 quality-assurance data for trace elements and major elements in 

sediment less than 0.063 millimeters in diameter, standard reference material, 

matrix spikes, and digest replicates......................................................................................129

Tables—Continued
ix

4–1A. Quality assurance and quality control for mercury concentration in 

fish tissue: laboratory blanks, certified reference materials, and 

continued calibration verification..........................................................................................132

4–1B. Quality assurance and quality control for mercury concentration in fish tissue, 

laboratory calibration standards and matrix spikes ...........................................................132

4–1C. Quality assurance and quality control for mercury concentration in fish tissue, 

lab replicates.............................................................................................................................133

4–2A. Quality assurance and quality control for selenium concentration in fish tissue, 

standard reference materials and matrix blanks ................................................................133

4–2B. Quality assurance and quality control for selenium concentration in fish tissue, 

lab replicates.............................................................................................................................133

Tables—Continued

Conversion Factors

International System of Units to U.S. customary units

Multiply By To obtain

Length

millimeter (mm) 0.03937 inch (in.)

micrometer (μm) 3.937×10-5 inch (in.)

nanometer (nm) 3.937×10-8 inch (in.)

Mass

kilogram (kg) 35.27 ounce, avoirdupois (oz)

gram (g) 0.03527 ounce, avoirdupois (oz)

milligram (mg) 3.527×10-5 ounce, avoirdupois (oz)

microgram (μg) 3.527×10-8 ounce, avoirdupois (oz)

nanogram (ng) 3.527×10-11 ounce, avoirdupois (oz)

picogram (pg) 3.527×10-14 ounce, avoirdupois (oz)

Volume

liter (L) 33.81402 ounce, fluid (fl. oz)

milliliter (mL) 0.3381402 ounce, fluid (fl. oz)

Pressure

Pascal pounds per square inch

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as 

°F = (1.8 × °C) + 32.

Datum

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83), 

unless otherwise specified. 
x

Supplemental Information

Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (μS/cm at 

25 °C). Concentrations of chemical constituents in water are given in either milligrams per liter 

(mg/L), micrograms per liter (μg/L), or nanograms per liter (ng/L).

Concentrations of chemical constituents in sediment and fish tissue are given in either 

milligrams per gram (mg/g), micrograms per gram (μg/g), nanograms per gram (ng/g), picograms 

per gram (pg/g), or micromoles per gram (μmol/g).

Acronyms, Abbreviations, and Chemical 

Notation

Acronyms and Abbreviations

%DEV percent deviation (half of absolute difference dividied by mean; 

 see equation 3)

AES atomic emission spectrometry

CAWSC (U.S. Geological Survey) California Water Science Center

CVAA cold vapor atomic absorption

CVAFS cold vapor atomic fluorescence spectrophotometry

CWA Clean Water Act

DDL daily detection limit

DEV deviation (half of absolute difference; see equation 2)

EPA (U.S.) Environmental Protection Agency

fdom flourescent dissolved organic matter

FIMS Flow Injection Mercury System

HDPE high-density polyethylene

ICP inductively coupled plasma

LDPSA laser diffraction particle size analyzer

LOI loss on ignition

LRL laboratory reporting limit

MDL method detection limit

MS mass spectroscopy

NAD 27 North American Datum of 1927

NAD 83 North American Datum of 1983

NIST National Institute of Standards and Technology
xi

NRCC National Research Council of Canada

NWIS National Water Information System

PETG polyethylene terephthalate glycol-modified

PTFE polytetrafluoroethylene (or Teflon ®)

QAQC quality assurance quality control

RPD relative percent difference (see equation 1)

SD standard deviation

SRM standard reference material

SWAMP Surface Water Ambient Monitoring Program

SWRCB California State Water Resources Control Board

UCD University of California, Davis

UCL upper confidence level

USGS U.S. Geological Survey

USGS-NRP-CB U.S Geological Survey National Research Program, Central Branch

USGS-NRP-WB U.S Geological Survey National Research Program, Western Branch

USGS NWQL U.S. Geological Survey National Water Quality Laboratory

Chemical Notation

%MeHg ratio of monomethyl mercury to total mercury, in percent

%MeHg-f ratio of monomethyl mercury to total mercury in filtered water, in percent

%MeHg-p ratio of monomethyl mercury to total mercury in suspended particulates, 

 in percent

%MeHg-s ratio of monomethyl mercury to total mercury in sediment, in percent

Al aluminum 

As arsenic 

B boron 

Ba barium 

Be beryllium 

Bi bismuth 

Ca calcium 

Cd cadmium 

Ce cerium

Cl chlorine 

Co cobalt 

Acronyms and Abbreviations—Continued
xii

Cr chromium 

Cs cesium 

Cu copper 

DOC dissolved organic carbon

Dy dysprosium 

Er erbium 

Eu europium 

Fe(II) ferrous iron

Fe(III)a amorphous ferric iron

Fe(III)c crystalline ferric iron

Fe iron 

Ga gallium

Gd gadolinium

H2O2 hydrogen peroxide

HCl hydrochloric acid

Hg(0) elemental mercury

Hg(II)R reactive mercury

Hg(II)R-p reactive mercury in suspended particulates

Hg(II)R-s reactive mercury in sediment

HgCl2 mercuric chloride

HNO3 nitric acid

Ho holmium 

K potassium 

La lanthanum

Li lithium 

Lu lutetium 

MeHg monomethyl mercury

MeHg-f monomethyl mercury in filtered water

MeHg-p monomethyl mercury in suspended particulates

MeHg-s monomethyl mercury in sediment

Mg magnesium 

Mn manganese 

Mo molybdenum 

Na sodium 

Chemical Notation—Continued
xiii

Nd neodymium 

NH3 ammonia

NH4

+

 ammonium

Ni nickel 

NO2

– nitrite

NO3

– nitrate

P phosphorus 

Pb lead 

PIC particulate inorganic carbon

POC particulate organic carbon

Pr praseodymium 

Rb rubidium 

Re rhenium 

S sulfur 

Sb antimony 

Se selenium 

Sm samarium 

Sn tin 

Sr strontium 

SUVA specific ultraviolet absorbance at 254 nanometers

Tb terbium 

TDN total dissolved nitrogen

Te tellurium 

Th thorium 

THg total mercury

THg-f total mercury in filtered water

THg-p total mercury in suspended particulates

THg-s total mercury in sediment

Ti titanium 

Tl thallium 

Tm thulium 

TE/Cations trace elements and cations

TOC total organic carbon

TPN total particulate nitrogen

Chemical Notation—Continued
xiv

TPCN total particulate carbon and nitrogen

TRS total reduced sulfur

TSS total suspended solids

U uranium 

V vanadium 

W tungsten 

Y yttrium 

Yb ytterbium 

Zn zinc 

Zr zirconium 

Chemical Notation—Continued
Abstract

This report presents geochemical data for surface 

water, streambed sediment, and fish tissue samples collected 

during low-flow conditions in 20 to 24 Sierra Nevada 

streams during 2011 and 2012. The dataset is part of a larger 

study designed to assess the factors that control mercury 

concentrations in fish tissue and to develop a model that 

predicts mercury concentration in the tissue of selected fish 

species in Sierra Nevada streams. The ranges of total mercury 

concentration observed in different matrices of water and 

sediment from 24 locations were as follows: below detection 

to 0.86 nanograms per liter in filtered water, below detection 

to 4.06 nanograms per liter in suspended particulates (greater 

than 0.3 micrometer in diameter), 1.1 to 381 nanograms 

per gram in bed sediment less than 2 millimeters, and 28.1 

to 1,410 nanograms per gram in bed sediment less than 

0.063 millimeters. The ratio of monomethyl mercury to total 

mercury ranged as follows: below detection to 19.2 percent in 

filtered water, below detection to 51.7 percent in suspended 

particles (greater than 0.3 micrometer), and below detection 

to 7.6 percent in streambed sediment less than 2 millimeters. 

Fish from 3 species collected at 20 locations had the following 

range in total mercury concentration (all concentrations wet 

weight): 10 to 292 nanograms per gram in rainbow trout 

(293 fish, 19 locations), 13 to 386 nanograms per gram in 

brown trout (33 fish, 10 locations), and 159 nanograms per 

gram in hardhead (1 fish). Concentrations of selenium in fish 

(wet weight) ranged from 60 to 420 nanograms per gram 

in rainbow trout (66 fish, 19 locations) and from 180 to 

240 nanograms per gram in brown trout (6 fish, 2 locations).

Introduction

Historical hydraulic and hard-rock gold mining in 

California, starting with the Gold Rush in the late 1840s and 

continuing into the mid-1900s, left an estimated 4.5 million 

kilograms of mercury (Hg) in the environment (Churchill, 

2000). The legacy effects of mining and stamp milling include 

Hg contamination of several rivers draining the western slope 

of the northern Sierra Nevada (Hunerlach and others, 2004; 

Alpers and others, 2005a) and downstream water bodies such 

as the Sacramento–San Joaquin Delta (Davis and others, 2008) 

and San Francisco Bay (Hornberger and others, 1999). 

Mercury is a trace element found in the Earth’s crust, 

atmosphere, and natural water. Monomethyl mercury, hereafter 

methylmercury or MeHg, is a neurotoxin that is biomagnified 

in the food web and threatens wildlife and human health 

(Fitzgerald and others, 1998; U.S. Environmental Protection 

Agency, 2001). Water bodies are considered impaired by 

the State of California under the federal Clean Water Act 

(CWA) if concentrations of total Hg (THg) in unfiltered 

water exceed 50 nanograms per liter (ng/L; California Toxics 

Rule; U.S. Environmental Protection Agency, 2000) or if 

concentrations of MeHg in fish tissue exceed 0.3 microgram 

per gram (μg/g; wet weight), equivalent to 300 nanograms 

per gram (ng/g; U.S. Environmental Protection Agency, 

2001). The California State Water Resources Control Board 

(SWRCB) is responsible for enforcing the CWA in California. 

Section 303(d) of the CWA requires identification of water 

bodies with impaired beneficial uses. In response to SWRCB 

requests for assistance, the U.S. Geological Survey (USGS), 

in cooperation with the SWRCB, undertook the present study 

to collect environmental Hg data and analyze the factors that 

control Hg concentrations in fish tissue in the Sierra Nevada. 

Predictions of Hg concentrations in fish tissue for 185 stream 

segments in the Sierra Nevada were made by Alpers and 

others (2016), based in part on data contained in this report.

Geochemical Data for Water, Streambed Sediment, and 

Fish Tissue from the Sierra Nevada Mercury Impairment 

Project, 2011–12

By Elizabeth B. Stumpner, Charles N. Alpers, Mark Marvin-DiPasquale, Jennifer L. Agee, Evangelos 

Kakouros, Michelle R. Arias, Le H. Kieu, David A. Roth, Darrell G. Slotton, and Jacob A. Fleck
2 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Purpose and Scope

This report documents the methods and results of field 

investigations during 2011 and 2012 in the Sierra Nevada 

foothills for the collection of water, sediment, and fish samples 

from 24 locations (fig. 1). The dataset is part of a larger 

study designed to assess the factors that control mercury 

concentrations in fish tissue and to develop a model that 

predicts mercury concentration in the tissue of selected fish 

species in Sierra Nevada streams. The main body of this report 

begins with the “Introduction,” followed by sections “Purpose 

and Scope” and “Study Design.” Following a brief description 

of the study design, the methods of sample collection and 

processing for water, sediment, and fish are introduced and 

followed by descriptions of analytical methods for all sample 

types. Quality-assurance and quality-control results are also 

presented in the “Methods” section. Tables of data for water, 

sediment, and fish tissue samples are included and discussed 

briefly in the “Results” section.

Study Design

Sampling for this study took place in low-flow conditions 

during late summer and early autumn of 2011 and 2012. Water 

and sediment samples were collected from 24 sites, and fish 

were collected from 20 sites. Water and sediment samples 

were collected by USGS staff, and analyses were performed 

at USGS laboratories. Fish were collected by the University 

of California, Davis (UCD), with the exception of four 

sites where the California Department of Fish and Wildlife 

collected fish for the Surface Water Ambient Monitoring 

Program (SWAMP); information on SWAMP qualityassurance procedures are provided by Bonnema (2011). Fish 

analyses were completed by UCD staff and performed at a 

UCD laboratory. Three of the sites sampled in 2011 were 

resampled in 2012 to assess year-to-year variability. Sites 

were chosen based on location in the watershed and proximity 

to historical mining activities (fig. 1). Five field blanks and 

three field replicates were collected for water samples for 

quality assurance and quality control; three replicates were 

also collected for sediment samples. Site information for 

water, sediment, and fish collection is presented in table 1. 

Site information for water and sediment replicates, and water 

blanks, is presented in table 2.
Introduction 3

Figure 1. Location of Sierra Nevada Mercury Impairment sites for water, bed

sediment and fish (Panel A). Discrete samples collected 2011-2012 across the

Sierra Nevada foothills (red triangles).

0 20 40 MILES

0 20 40 KILOMETERS

Base modified from U.S. Geological Survey and 

other Federal and State digital data, various scales; 

Albers Equal-Area Conic projection, standard parallels 

are 29°30" N. and 45°30" N.; North American Datum of 1983

Vernalis

Marysville

Rio

Vista

Tracy

San Jose

Chico

Sacramento

Stockton

Yuba

City

SNI-009

SNI-046

SNI-012

SNI-013

SNI-040

SNI-048

SNI-056 SNI-055

SNI-058

SNI-043 SNI-057

SNI-042

SNI-045 SNI-001,

SNI-044

SNI-002 SNI-047

SNI-042

SNI-051

SNI-053

SNI-011 SNI-054

SNI-007

SNI-005,

SNI-049

SNI-006,

SNI-050

LAKE

TAHOE

FOLSOM

LAKE

LAKE

OROVILLE

NEW BULLARDS

BAR RESERVOIR

LAKE

MCCLURE

SAN FRANCISCO 

BAY

South Fork

Cosumnes

River

Middle Fork

Cosumnes River

North Fork Feather River

Middle Fork Feather River

South Fork Feather River

North Fork Yuba River Middle Fork Yuba River

South Fork Yuba River

Feather River

Yuba River Dee r Creek

Bea r River N orth Fork American River

Middle Fork Am erican River

South Fork American River North Fork Cosumnes River

Sacramento River

A merica n River

Cosumnes Ri ver

Moke l u mne River

Calaveras River

Stanislaus River

Tuolumne River

Merc ed River

San Joaquin River

122° 121°30' 121° 120°30' 120°

40°

39°30'

39°

38°30'

38°

37°30'

CALIFORNIA

NEVADA

Map area

Sacramento

Los Angeles

San 

Francisco

Figure 1. Location of Sierra Nevada Mercury Impairment Project sites for water, bed sediment, and fish. Discrete samples collected in 

2011–12 across the Sierra Nevada foothills (red triangles).
Table 1. Location, date, and time of environmental water, sediment, and fish samples. [A, at; AB and ABV, above; BL, below; C, Creek; CA and Ca, California; DMS, degree, minute, second; hh:mm; hour:minute; HWY, Highway; ID, identification; LK, Lake; MFmm/dd/yyyy; month/day/year; N., North; na, not applicable; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; NF, North Fork; NR, near; NWSystem; PDT, Pacific Daylight Time; PH, Powerhouse; PST, Pacific Standard Time; R, River; RD, Road; S, South; SF, South Fork; trib., tributary; UC, University of California; VLY, Valley] Project ID Site ID USGS station name (NWIS) Field station name Date of water and sediment collection (mm/dd/yyyy) Time of water and sediment collection (hh:mm) Time datum Date of fish collection UC Davis (mm/dd/yyyy) Lati

(DM

SNI-001 391911120392201 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA South Yuba below Spaulding 09/07/2011 15:20 PST 08/11/2011 39°1SNI-002 392119120484901 S YUBA R BL POORMAN C NR WASHINGTON CA South Yuba at Washington 09/07/2011 11:10 PST na 39°2SNI-005 11403050 BELDEN PH A BELDEN CA Yellow Creek near Belden, CA 09/19/2011 15:40 PDT 08/23/2011 40°0SNI-006 400129120580701 SPANISH C BL CLEAR C NR KEDDIE CA Spanish Creek at Highway 70 09/20/2011 10:50 PDT 08/28/2011 40°0SNI-007 395830120542501 SPANISH C NR EAST QUINCY CA Spanish Creek at Oakland Camp Road (N. Feather trib.) 09/20/2011 16:00 PDT na 39°5SNI-009 11393000 MF FEATHER R A SLOAT CA Middle Fork Feather River at Sloat, Ca 09/21/2011 12:30 PDT na 39°5SNI-011 394647120314501 MF FEATHER R NR DELLEKER CA Middle Fork Feather River 3 mi upstream of Clio 09/22/2011 13:00 PDT na 39°4SNI-012 373637119573801 MERCED R AB BM1186 NR BRICEBURG CA Merced near Briceburg 11/03/2011 11:00 PST 10/20/2011 37°3SNI-013 374017119472301 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA Merced near El Portal 11/02/2011 13:00 PDT 10/19/2011 37°4SNI-040 383403120272101 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA Middle Fork Cosumnes at PiPi 08/30/2012 14:30 PST 07/19/2012 38°3SNI-042 390955121034101 WOLF C NR LA BARR MEADOWS CA Wolf Creek at Alisson Road 09/06/2012 14:30 PST 07/22/2012 39°0SNI-043 390722121013901 S WOLF C NR CHICAGO PARK CA South Wolf Creek at Clover Valley Road 09/06/2012 16:00 PST 07/23/2012 39°0SNI-044 391911120392201 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA South Yuba below Spaulding 09/20/2012 11:30 PDT 08/08/2012 39°1SNI-045 391754120504801 SF DEER C NR 

WASHINGTON CA

Deer Creek above Scotts 

Flat

09/25/2012 13:10 PST 07/24/2012 39°1
Project 

ID

Site 

ID

USGS 

station name 

(NWIS)

Field 

station name

Date of 

water and 

sediment 

collection

(mm/dd/yyyy)

Time of 

water and 

sediment 

collection

(hh:mm)

Time 

datum

Date of fish 

collection 

UC Davis

(mm/dd/yyyy)

Lati

(DM

SNI-046 11414000 S YUBA R NR CISCO CA SouthYuba above Lake 

Spaulding

09/25/2012 15:00 PDT 08/06/2012 39°1

SNI-047 392122120364501 FORDYCE C AB LK 

SPAULDING NR EMIGRANT GAP CA

Fordyce Creek 10/01/2012 13:40 PST 08/22/2012 39°2

SNI-048 383632120365101 MF COSUMNES R NR OMO 

RANCH CA

Middle Fork Cosumnes at 

Rocky Bar

10/03/2012 12:00 PST 07/17/2012 38°3

SNI-049 11403050 BELDEN PH A BELDEN CA Yellow Creek near Belden, 

CA

10/16/2012 14:50 PDT 10/02/2012 40°0

SNI-050 400129120580701 SPANISH C BL CLEAR C NR 

KEDDIE CA

Spanish Creek at Highway 

70

10/16/2012 10:20 PDT 10/03/2012 40°0

SNI-051 394034121051801 SF FEATHER R NR LA 

PORTE CA

South Feather below Little 

Grass Valley Road

10/17/2012 12:00 PST 10/08/2012 39°4

SNI-052 393302121124501 SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

South Feather below 

Forbestown Reservoir

10/31/2012 11:10 PST 10/10/2012 39°3

SNI-053 394237121161801 MF FEATHER R A MILSAP 

BAR NR BRUSH CREEK CA

Middle Feather at Milsap 

Bar

10/31/2012 14:30 PST 10/16/2012 39°4

SNI-054 395141120504901 MF FEATHER R ABV BRAY 

C NR SLOAT CA

Middle Feather La Porte 

Road

11/07/2012 14:30 PST 10/15/2012 39°5

SNI-055 384634120445301 SF AMERICAN R A 

MOSQUITO RD NR PLACERVILLE CA

South Fork American below 

Slab Creek Reservoir

11/14/2012 11:30 PST 11/04/2012 38°4

SNI-056 384526120162901 SILVER FORK OF 

AMERICAN R NR KYBURZ CA

Silver Fork of South Fork 

American

11/14/2012 15:00 PST 10/29/2012 38°4

SNI-057 390120120431601 NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

North Fork of Middle Fork 

American

11/15/2012 11:20 PST 11/13/2012 39°0

SNI-058 385957120432401 RUBICON R NR 

VOLCANOVILLE CA

Rubicon Road 11/15/2012 13:20 PST 11/06/2012 38°5

Table 1. Location, date, and time of environmental water, sediment, and fish samples.—Continued[A, at; AB and ABV, above; BL, below; C, Creek; CA and Ca, California; DMS, degree, minute, second; hh:mm; hour:minute; HWY, Highway; ID, identification; LK, Lake; MFmm/dd/yyyy; month/day/year; N., North; na, not applicable; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; NF, North Fork; NR, near; NWSystem; PDT, Pacific Daylight Time; PH, Powerhouse; PST, Pacific Standard Time; R, River; RD, Road; S, South; SF, South Fork; trib., tributary; UC, University of California; VLY, Valley]
Table 2. Location, date, and time of water and sediment replicates and water blanks. [ABV, above; BL, below; C, Creek; CA, California; DMS, degree minute second; hh:mm, hour:minute; ID, identification; MF, Middle Fork; mm/dd/yyyy, month/day/year; na, nAmerican Datum of 1983; NR, near; NWIS, National Water Information System; PDT, Pacific Daylight Time; PST, Pacific Standard Time; QA, quality assurance; QW, quality oUSGS, U.S. Geological Survey; VLY, Valley] Project ID Site ID USGS station name (NWIS) Field station name Date of water and sediment collection (mm/dd/yyyy) Time datum Time of water and sediment collection (hh:mm) Type of quality assurance sample Latitude (DMS) 

SNI-003 392119120484901 S YUBA R BL POORMAN C NR WASHINGTON CA South Yuba at Washington 09/07/2011 PST 11:15 replicate 39°21 ́19SNI-041 383403120272101 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA Middle Fork Cosumnes at PiPi 08/30/2012 PST 14:35 replicate 38°34 ́03SNQ-054 395141120504901 MF FEATHER R ABV BRAY C NR SLOAT CA Middle Feather La Porte Road 11/07/2010 PST 14:35 replicate 39°51 ́41SNI-004 88888823 QW QA SITE FOR CHARLES ALPERS Equipment blank 09/08/2011 PST 16:20 blank na SNI-010 88888823 QW QA SITE FOR CHARLES ALPERS Equipment blank 09/21/2011 PDT 12:30 blank na SNI-015 88888823 QW QA SITE FOR CHARLES ALPERS Equipment blank 11/03/2011 PST 14:00 blank na SNQ-002 88888823 QW QA SITE FOR CHARLES ALPERS Equipment blank 09/20/2012 PDT 08:00 blank na SNQ-003 88888823 QW QA SITE FOR CHARLES ALPERS Equipment blank 10/16/2012 PDT 22:00 blank na 
Methods 7

Methods

The following section includes the sample collection and 

processing methods, followed by a separate section describing 

analytical methods and quality assurance for surface water, 

bed sediment, and fish tissue. 

Sample Collection and Processing Methods

Fish were collected on separate days from surface-water 

and bed-sediment samples to minimize disturbance at the site 

of field collection.

Surface Water

Water samples were collected in either Teflon containers 

or plastic containers lined with a fluoropolymer such as 

polytetrafluoroethylene (PTFE) and were processed using 

techniques described previously (Alpers and others, 2005b, 

2008). Water was transferred to a Teflon-lined, stainlesssteel churn within 24 hours of sample collection. Aliquots 

for THg, MeHg, dissolved organic carbon (DOC), and 

optical parameters related to carbon quality were filtered 

through pre-baked 0.3-micrometer (μm) glass-fiber filters 

(Advantec, Dublin, California). Aliquots for THg and MeHg 

were collected in polyethylene terephthalate glycol-modified 

(PETG) bottles (ThermoScientific, Waltham, Massachusetts), 

acidified to 0.5 percent by volume with ultrapure hydrochloric 

acid, and placed in the dark until analysis. One amber glass 

bottle was used to collect water for DOC and optical analyses. 

All other aliquots were filtered through 0.45-μm inline 

filters (Pall, Port Washington, New York) into high-density 

polyethylene (HDPE) containers. Aliquots for analysis of 

trace elements and cations (TE/Cations) were acidified to 

0.1-percent concentration of ultrapure nitric acid.

Water-quality constituents measured in the field include 

temperature, pH, specific conductance, dissolved oxygen, 

and turbidity. All constituents were determined using a 

multiparameter YSI 6920 meter (YSI, Yellow Springs, Ohio) 

calibrated using procedures according to manufacturer 

recommendations and the USGS National Field Manual (Gibs 

and others, 2007).

Bed Sediment

Bed sediment was collected using an acid-rinsed 

polycarbonate core ring and a stiff acid-cleaned plastic sheet 

using techniques described previously (Marvin-DiPasquale 

and others, 2009). Sediment was sieved in the field to less 

than 2 millimeters (mm) and homogenized, then split into 

containers for analyses of Hg, dry weight, loss on ignition, 

bulk density, porosity, iron species, and total reduced sulfur, 

and then placed on dry ice. Additional containers of less than 

2-millimeter (mm) material were placed on wet ice for grainsize distribution analysis and for further sieving to less than 

0.063-mm (63-μm) material in the laboratory for analysis of 

Hg and TE/Cations. Sediment sieving was done using stainless 

steel screens and deionized water. All water passing through a 

0.063-mm sieve was retained, and the samples were dewatered 

using a centrifuge operated at 10,000 revolutions per minute.

Fish Tissue

Fish were collected by UCD with a backpack 

electroshocker and by angling to capture rainbow trout 

(n = 237), brown trout (n = 33), and hardhead (n = 1) from 

20 sites. The fish were processed by the UCD laboratory 

as fresh (wet) samples. Fish sampling and preservation 

techniques were described previously by Saiki and others 

(2004).

Analytical Methods and Quality Assurance

Analytical methods used for water, sediment, and 

fish samples are listed in appendix 1 as tables 1–1, 1–2, 

and 1–3, respectively. For USGS-approved methods used 

by laboratories such as the USGS National Water Quality 

Laboratory (NWQL) in Denver, Colorado, the reader is 

referred to published sources for method information. This 

section provides more detailed information for research-based 

analytical methods that have recently been approved by the 

USGS, or that are not subject to formal approval. 

Quality-assurance and quality-control (QAQC) results 

are presented in appendixes 2 (water), 3 (sediment), and 

4 (fish). Where available, QAQC results are given for 

standard reference materials, laboratory duplicates, matrix 

spikes, equipment blanks, and field replicates. Results of 

QAQC for water analyses are given in appendix tables 2–1 

through 2–24, for sediment analyses in appendix tables 3–1 

through 3–15, and for fish analyses in appendix tables 4–1

and 4–2. For ambient concentrations greater than three times 

the method detection limit (MDL), data-quality objectives 

of the project were met when the mean value of equipment 

blanks was below the MDL, the relative percent difference 

(RPD) among field replicates and laboratory duplicates was 

less than 20 percent for water analytes, the percent deviation 

(%DEV) between field replicates and laboratory duplicates 

was less than 20 percent for suspended and bed sediment 

analytes, and standard reference material (SRM) and matrixspike recoveries were within a threshold of ±20 percent of 

expected concentrations. Values of RPD were computed using 

equation 1:
8 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

RPD in percent

v v

v v ( )    

 



 







1 2

1 2

2

100 (1)

where

v1 and v2 are values being compared.

For ambient concentrations less than three times the 

MDL, greater variability for replicates is expected, with values 

of RPD up to 100 percent at the MDL, including equations 2

and 3. Unless specified otherwise, data-quality objectives of 

this project were met for all analytes.

The deviation (DEV, half of absolute relative difference) 

was calculated using equation 2:

DEV absolute

run run  1 2 

2 (2)

The percent deviation (%DEV) was then calculated using 

equation 3: 

% / DEV D    EV mean 100 (3)

and is the percentage of DEV relative to the mean value. 

Water

Surface water was analyzed for total mercury, 

methylmercury, total suspended solids, organic carbon and 

nitrogen, absorbance and fluorescence spectral indicators, 

total particulate carbon and nitrogen, nutrients, alkalinity, 

chlorophyll a and pheophytin-a, anions, suspended sediment 

concentration, and cations and trace elements.

Total Mercury

Total mercury (THg) in water samples was determined 

for filtered and particulate fractions at the USGS National 

Research Program, Western Branch (USGS-NRP-WB) 

Biogeochemistry Laboratory in Menlo Park, Calif. Cold vapor 

atomic fluorescence spectrometry (CVAFS) methods using a 

modified version of U.S. Environmental Protection Agency 

(EPA) Method 1631 (U.S. Environmental Protection Agency, 

2002a, b) were previously described by Olund and others 

(2004). The MDL for THg in water samples analyzed in 2011 

using the Tekran Model 2600 is 0.04 ng/L; for water samples 

analyzed in 2012, the MDL is 0.06 ng/L. For particulate 

samples (on filters), the MDL for THg is 0.03 nanogram 

per filter, corresponding to a volumetric concentration of 

approximately 0.07 ng/L, depending on volume filtered and 

the mass of sediment deposited on the filter.

Quality-assurance data for surface-water total mercury 

(filtered; THg-f) are presented in appendix table 2–1. 

Calibration standards were prepared from a National Institute 

of Standards and Technology (NIST)-certified, commercially 

obtained mercuric chloride (HgCl2) standard. Three of the five 

equipment blanks were below the MDL, and the other two 

were 0.09 (estimated) and 0.10 ng/L (appendix table 2–1B). 

Environmental sample concentrations ranged from less than 

the MDL to 0.86 ng/L. Two of the three replicate sample pairs 

had estimated concentrations between the MDL and the lower 

calibration standard. The RPD for these two pairs were 11 and 

30 percent. A third replicate pair, with concentrations farther 

from the MDL, had a RPD of 1.7 percent, well within the 

acceptable range (appendix table 2–1C). All quality-assurance 

data for THg-f met the data-quality objectives of this project 

(appendix table 2–1).

Quality-assurance data for surface-water total mercury 

(particulate; THg-p) are presented in appendix table 2–2. 

All three of the replicate pairs for THg-p included estimates 

between the MDL and the lowest calibration standard. 

Values of RPD for one of the three replicate pairs was less 

than 10 percent, but one of the pairs, the one with the lowest 

concentrations, had an RPD value of 70 percent (appendix 

table 2–2C). All other quality-assurance data for THg-p met 

the data-quality objectives of this project (appendix table 2–2).

Methylmercury

Monomethyl mercury (MeHg) in water samples was 

determined for filtered and particulate fractions by the USGSNRP-WB Biogeochemistry Laboratory. The MeHg extraction 

and quantification was completed using a method developed 

by the Florida Department of Environmental Protection 

(2011, 2013). The potassium hydroxide/methanol extraction 

and CVAFS methods have been previously described by 

Marvin-DiPasquale and others (2011). The MDL for this 

method for filtered water is 4 picogram per liter (pg/L; or 

0.004 ng/L). For particulate samples (on filters), the MDL for 

MeHg is 0.12 picogram per gram (pg/g), corresponding to 

approximately 8.2 pg per filter, or a volumetric concentration 

of approximately 0.004 ng/L, depending on volume 

filtered and the mass of sediment deposited on the filter. 

Two analytical runs were completed for all water samples. 

Calibration standards were prepared from a NIST-certified, 

commercially obtained MeHg standard. Quality-assurance 

data for filtered monomethyl mercury (MeHg-f) are presented 

in appendix table 2–3. Quality-assurance data for MeHg-f met 

the data-quality objectives of this project with the exception of 

field replicate SNQ-054 (appendix table 2–3C), which had a 

42-percent RPD from environmental sample SNI-054.

Quality-assurance data for particulate MeHg in water 

(MeHg-p) are presented in appendix table 2–4. Qualityassurance data for MeHg-p met the data-quality objectives of 

this project with the exception of field replicates SNI-041 and 

SNQ-54, which had 25-percent RPDs from the environmental 

samples SNI-040 and SNI-54, respectively (appendix 

table 2–4C).
Methods 9

Total Suspended Solids

Total suspended solids (TSS) in water samples were 

determined by the USGS-NRP-WB Biogeochemistry 

Laboratory using the same 0.3-μm pore-diameter glassfiber filters that were used to determine THg-p and MeHg-p 

concentrations. Twenty-seven laboratory duplicates of TSS 

measurements (appendix table 2–5) had a mean DEV and 

standard deviation of 0.09±0.18 milligram per liter (mg/L). 

Values of %DEV for 18 of the 27 duplicate pairs for TSS 

analysis were less than 20%. Eight of the nine duplicate pairs 

with %DEV values above 20% had average TSS values less 

than 0.7 mg/L. 

Organic Carbon 

Dissolved organic carbon (DOC) was determined using 

high-temperature combustion and infrared detection on a 

total organic carbon analyzer (Model TOC-VCPH, Shimadzu 

Scientific Instruments, Columbia, Maryland) at the USGS 

Organic Matter Research Laboratory (OMRL) in Sacramento, 

Calif. (Stumpner and others, 2015). Appendix table 2–6

presents quality-assurance data for matrix blanks, matrix 

spikes, and SRMs for DOC analyses. The MDL for DOC 

was 0.03 mg/L, and the laboratory reporting limit (LRL) was 

0.3 mg/L. Quality-assurance data for DOC met the dataquality objectives of this project. 

Absorbance and Fluorescence Spectral Indicators

Absorbance spectra were determined on a CARY-300 

spectrophotometer (Agilent Technologies, Santa Clara, Calif.), 

and fluorescence matrices were determined on a Fluoromax-4 

spectrofluorometer (Horiba Instruments, Edison, New Jersey) 

at the OMRL, previously described in Fleck and others 

(2014). The spectral correction procedures and measurements 

were within quality-assurance (QA) thresholds according to 

the daily water Raman peak area and laboratory reference 

material (Lipton, Unsweetened Black Tea, Purchase, N.Y.), as 

defined in Fleck and others (2014). Appendix tables 2–7 and 

2–8 present QA data for SRM data, equipment blanks, and 

field replicates. The SRMs in appendix tables 2–7 and 2–8

are reported for absorbance and fluorescence, respectively; 

for absorbance wavelengths and fluorescence excitationemission pairs, two SRMs were analyzed for each run date, 

and MDLs are reported for each absorbance wavelength and 

fluorescence excitation-emission pair. The daily detection 

limits (DDLs) associated with each absorbance sample are the 

five organic-free water blanks analyzed for that run date and 

calculated for each as three times the standard deviation (SD) 

plus the average. The DDLs associated with each fluorescence 

excitation-emission pair are based on one organic-free water 

blank. In cases where absorbance and fluorescense spectral 

indicators are ‘estimated’ values, relative percent difference 

was not calculated. 

Total Particulate Carbon and Nitrogen

Analyses of total particulate carbon and nitrogen (TPCN) 

were done at the USGS NWQL in Denver, Colo., according 

to EPA Method 440 (Zimmermann and others, 1997). 

Constituents included particulate inorganic carbon (PIC), 

particulate organic carbon (POC), total organic carbon (TOC), 

and total particulate nitrogen (TPN). Collectively, this group 

of constituents is referred to as total particulate carbon and 

nitrogen (TPCN). Quality-assurance data for these constituents 

(appendix table 2–9) met the data-quality objectives of the 

project, with the exception of a replicate pair for TPN that had 

an RPD value greater than 20 percent. 

Nutrients

Several forms of nitrogen and phosphorus were analyzed 

in surface-water samples at the USGS NWQL. Methods are 

listed in appendix table 1–1. Organic nitrogen and ammonia 

were analyzed in unfiltered and filtered water. The following 

other nitrogen species were analyzed in filtered water only: 

nitrate plus nitrite, nitrite, and ammonia. Total phosphorus 

was analyzed in unfiltered and filtered water. Orthophosphate 

was analyzed in filtered water only. Quality-assurance 

data for nutrient analyses are provided in appendix 2, as 

follows: unfiltered organic nitrogen plus ammonia (appendix 

table 2–10), filtered organic nitrogen plus ammonia (appendix 

table 2–11), filtered nitrate plus nitrite (appendix table 2–12), 

filtered ammonia (appendix table 2–13), filtered nitrite 

(appendix table 2–14), unfiltered total phosphorus (appendix 

table 2–15), filtered total phosphorus (appendix table 2–16), 

and orthophosphate (appendix table 2–17). Replicate RPD 

values for all nutrient constituents were less than 10 percent 

(appendix tables 2–10 to 2–17). Data for blanks and replicates 

for each of these constituents met the data-quality objectives 

of the project.

Alkalinity

Alkalinity of surface-water samples was determined 

by titration with sulfuric acid at the USGS NWQL. Qualityassurance data (appendix table 2–18) indicate low replicate 

RPD values (less than 1 percent). Alkalinity concentrations 

in equipment blanks were in the range of 2.7 to 4.6 mg/L 

as CaCO3; the lowest alkalinity concentration for an 

environmental sample was 10 mg/L as CaCO3. Therefore, 

the quality-assurance data for alkalinity met the data-quality 

objectives of the project.

Chlorophyll a and Pheophytin a

Chlorophyll a and pheophytin a were analyzed by 

fluorescence at the USGS NWQL. Quality-assurance data 

for chlorophyll a and pheophytin a are presented in appendix 

table 2–19. No blank filters were submitted to the NWQL for 

analysis. The RPD values for two replicates were less than 

10 percent for both constituents, which met the data-quality 

objectives of the project.
10 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Anions

Concentrations of sulfate and chloride were determined 

by ion chromatography at the USGS NWQL. Methods 

are listed in appendix table 1–1. Quality-assurance data 

are presented in appendix tables 2–20 (sulfate) and 2–21

(chloride). Concentrations in equipment blanks were at or 

near the MDL for both constituents, well below the observed 

levels in all environmental samples. The RPD values for three 

replicates were less than 15 percent for both constituents, 

meeting the data-quality objectives for the project.

Suspended Sediment Concentration

Suspended sediment concentration (SSC) and percent 

fines (less than 0.063 mm) were analyzed at the USGS Santa 

Cruz Sediment Laboratory. Quality-assurance data for SSC 

(appendix table 2–22) indicate poor results for replicates; two 

of the three replicates had RPD values of 67 percent. However, 

for both of these replicate pairs, the observed concentrations 

were 1 and 2 mg/L, close to the MDL (0.5 mg/L). Three 

equipment blanks were analyzed for SSC. Two blanks had 

SSC results less than the MDL, and the third was 1.0 mg/L. 

Environmental samples had low SSC because sampling 

was done at low-flow conditions; 20 of 27 analyses were 

2 mg/L or less, and only 1 of 27 analyses was greater than 

5 mg/L. Therefore, the low range of reported SSC values for 

environmental samples (2 mg/L and less) should be used with 

caution, as it likely contains a high uncertainty.

Cations and Trace Elements

Fifty-four cations and trace elements were analyzed in 

filtered water by inductively coupled plasma (ICP). Atomic 

emission spectroscopy (AES) methods were used for major 

elements and mass spectroscopy (MS) methods for minor 

and trace elements. The ICP analyses were performed at the 

USGS National Research Program, Central Branch (USGSNRP-CB) laboratory in Boulder, Colo. The methods were 

previously described by Marvin-DiPasquale and others (2009). 

Quality-assurance data for ICP analyses in water, including 

MDLs, equipment blanks, replicates, SRMs, and matrixspike recoveries, are given in appendix table 2–23. Appendix 

tables 2–23A–E report QAQC data for samples collected 

during 2011, and appendix tables 2–24A–E report QAQC 

data for samples collected during 2012. The USGS-NRP-CB 

laboratory reports the mean concentration of triplicate 

analysis. When two or three samples were collected for 

analysis, the NWIS environmental database stores the mean 

concentration data of the first bottle, and the NWIS QAQC 

database contains mean concentration data of the second bottle 

and when applicable, the third bottle.

Analytical results for the first equipment blank of 

the 2012 sampling season (SNQ-001) indicated high 

concentrations of several cations and trace elements. The high 

values observed could be the result of contamination of the 

deionized water used for the blank or inappropriate cleaning 

techniques of sampling equipment. As a result, data for SNQ001 are not included in the QA tables (appendix tables 2–1 to 

2–4, 2–6 to 2–10, 2–24A–E).

For the remaining five blanks (three from 2011 and 

two from 2012), the 80-percent upper confidence level for 

the 80th percentile concentration of the equipment blanks 

(80 UCL) was estimated for each analyte using the Excel®

confidence function (Microsoft Office®, 2010). The function 

requires the standard deviation of the mean of the five blanks 

and sample size. When blank concentrations were reported 

less than the MDL, the MDL was assigned as the sample 

concentration. The mean value of the blanks and confidence 

function were combined to determine the 80 UCL. Any 

environmental samples with concentrations less than the 

80 UCL value were assigned a value-qualifier code of “V” 

in the database and tables, indicating that caution should be 

used in their interpretation. The UCL was not determined for 

cesium (Cs), erbium (Er), rhenium (Re), or vanadium (V) 

because the standard deviation of the mean was zero for these 

elements.

Bed Sediment

Bed sediment was analyzed for total mercury, 

methylmercury, reactive mercury, iron species, total reduced 

sulfur, organic content by loss on ignition, bulk density, dry 

weight, porosity, sediment grain size, and cations and trace 

elements.

Total Mercury

Total mercury in bed-sediment samples (THg-s) for 

sediment less than 2 mm and less than 0.063 mm was 

determined by the USGS-NRP-WB Biogeochemistry 

Laboratory. Subsamples for THg-s were analyzed following 

the USGS-approved method (Olund, 2004). Once thawed, 

approximately 0.25 grams (wet weight) of sediment was 

digested in aqua regia (2 milliliters [mL] concentrated 

hydrochloric acid and 6 mL nitric acid) for 24 hours. Bromine 

monochloride (5 percent weight per volume) was then added 

to each sample, which was subsequently heated to 50 °C in 

an oven overnight. Samples were then transferred to a precombusted glass container and analyzed on an automated 

mercury analyzer (Tekran Model 2600) according to EPA 

Method 1631, Revision E (U.S. Environmental Protection 

Agency, 2002a, b). The 2012 analytical run for THg for 

sediment less than 2 mm had one SRM with a percent 

recovery greater than the data-quality objectives of the project; 

other quality-assurance data for THg in sediment, which 

met the data-quality objectives of the project, are given in 

appendix table 3–1.
Methods 11

Methylmercury

The concentration of MeHg in sediment samples 

(MeHg-s) was determined by the USGS-NRP-WB 

Biogeochemistry Laboratory. Extraction and quantification 

of MeHg-s was completed using a method developed by the 

Florida Department of Environmental Protection (2011, 2013). 

The potassium hydroxide/methanol extraction and CVAFS 

methods were described by Marvin-DiPasquale and others 

(2011). Quality-assurance data for MeHg in sediment, given 

in appendix table 3–2, met the data-quality objectives of the 

project.

Reactive Mercury

Reactive mercury (Hg(II)R) in bed sediment (Hg(II)R-s) 

was determined by the USGS-NRP-WB Biogeochemistry 

Laboratory. The reactive mercury assay was previously 

described by Marvin-DiPasquale and Cox (2007). During the 

15-minute reaction and N2 purge step, Hg(II)R was reduced to 

elemental Hg(0), which was trapped on a gold-coated-sand 

trap per EPA Method 1631 (U.S. Environmental Protection 

Agency, 2002b). The Hg(0) was then thermally desorbed 

from the gold-coated-sand trap onto a second gold-coatedsand analytical trap, using argon as a carrier gas. The analyte 

was then thermally desorbed from the analytical trap and sent 

through a CVAFS detection system. The CVAFS detector 

(Brooks Rand Model III mercury analyzer) communicates to 

peak-integration software (Peak Simple, Chrom Tech, Inc., 

Apple Valley, Minnesota) to convert the analog signal output 

to an integrated peak-area value. Quality-assurance data for 

Hg(II)R are given in appendix table 3–3. Laboratory duplicates 

ranged from 0.005–1.47 ng/g DEV. Two of the %DEV values 

were greater than 20 percent.

Iron Species

Iron (Fe) speciation in sediment samples was determined 

by the USGS-NRP-WB Biogeochemistry Laboratory. Three 

Fe fractions were chemically extracted and assayed as 

described by Marvin-DiPasquale and others (2009): acidextractable ferrous iron (Fe(II)), crystalline ferric iron 

(Fe(III)c), and amorphous ferric iron (Fe(III)a). The MDL for 

all Fe analysis was 0.01 mg/mL. Spectrophotometry, after a 

weak acid extraction, was used for the Fe(II)AE and 

Fe(III)c methods, whereas Fe(III)a required an additional 

reduction and spectrophotometric measurement. Qualityassurance data for Fe(II)AE, Fe(III)c

, and Fe(III)a, presented in 

appendix tables 3–4 to 3–6, respectively, met the data-quality 

objectives of the project.

Total Reduced Sulfur

Total reduced sulfur (TRS) in sediment samples was 

determined by the USGS-NRP-WB Biogeochemistry 

Laboratory based on the heated acid/chromium distillation 

procedure by Fossing and Jørgensen (1989). The procedure 

was previously described by Marvin-DiPasquale and others 

(2011). Appendix table 3–7 presents quality-assurance data for 

TRS in sediment. All data met the data-quality objectives of 

the project with the exception of a %DEV value of 52 percent 

for a laboratory duplicate for a sample sieved to <2 mm, which 

is prone to more heterogeneity than the duplicate samples 

(n = 4) sieved to <0.063 mm.

Organic Content by Loss on Ignition

Loss on ignition (LOI), an indicator of organic content 

in sediment samples, was determined by the USGS-NRP-WB 

Biogeochemistry Laboratory in a method previously described 

by Marvin-DiPasquale and others (2009). Appendix table 3–8

presents quality-assurance data for LOI in sediment. Values of 

DEV were less than 9 percent for all 18 replicate LOI analyses 

(12 sieved to less than 2 mm, 6 sieved to less than 0.063 mm), 

which met the data-quality objectives of the project.

Bulk Density, Dry Weight, and Porosity

Bulk density, dry weight, and porosity in sediment 

samples were determined by the USGS-NRP-WB 

Biogeochemistry Laboratory using methods previously 

described by Marvin-DiPasquale and others (2009). Qualityassurance data for dry weight, bulk density, and porosity are 

presented in appendix tables 3–9 to 3–11, respectively. Values 

of DEV for laboratory replicates were less than 7 percent for 

each of these analytes, which met the data-quality objectives 

of the project.

Sediment Grain Size

Analyses of sediment grain-size distribution were 

performed at the USGS California Water Science Center 

(CAWSC) Hydrologic Research Laboratory. Bed-sediment 

material smaller than 2 mm was analyzed on a model 

LS 13 320 single-wavelength laser diffraction particle-size 

analyzer (LDPSA, Beckman-Coulter, Pasadena, Calif.). Prior 

to analysis, samples were dried at 55 °C and were split into 

representative aliquots using a Sieving Riffler (Quantachrome 

Instruments, Boynton Beach, Florida). Material that did not fit 

through a 1-mm sieve was excluded. Approximately 500 mg 

of sediment was placed in the LDPSA unit, which uses a 

5 milliwatt laser diode with a wavelength of 750 nanometers. 

A dispersing agent was used to break up aggregated particles. 

The composite light-scattering pattern was measured by 

126 detectors placed at angles up to approximately 35 degrees 

from the optical axis (Beckman Coulter, Inc., 2011). In the 

LDPSA, the composite scattering pattern was deconvolved to 

a set of individual numbers, one for each size classification, 

and the relative amplitude of each number is a measure of 

the relative volume of equivalent spherical particles of that 

size. This deconvolution is based on the Fraunhofer optical 

model, the instrument default, which assumes that the particle 

diameter is much larger than the wavelength of the light and 

that the refractive index of the particles is different than that of 

the transport medium, in this case, water (Beckman Coulter, 

Inc., 2011). 
12 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Each sample was run in duplicate, and the median grainsize (D50) values for the two runs were compared by RPD. If 

the RPD was greater than 10 percent, then additional aliquots 

were analyzed until a pair of analyses had D50 values that 

produced an RPD value of less than 10 percent. A total of 

31 laboratory duplicates were analyzed (28 environmental 

samples and 3 field replicates), with a mean RPD for D50 

(median grain size) of 3.8±2.9 percent (appendix table 3–12). 

Of the 31 samples analyzed for grain-size distribution, 8 (or 

27 percent) required analysis of more than two aliquots.

Raw data from the LDPSA were post-processed 

using MATLAB (The MathWorks, Inc., Natick, Mass.) to 

produce tabular data in 1/2-phi size bins and to compute the 

proportions of sand, silt, and clay in each sample (appendix 

table 3–13). The phi scale for sediment particles is defined in 

equation 4: 

phi  log(base 2) (diameter in mm) (4)

such that a phi of 0 corresponds to 1 mm, a phi of 2 

corresponds to 0.25 mm (1/4 mm), a phi of 4 is 0.0625 mm 

(1/16 mm), and a phi of 8 is approximately 0.004 mm 

(1/256 mm; Poppe and others, 2003). 

Trace Elements and Major Elements

Fifty-four major and trace elements were analyzed 

in bed sediment less than 0.063 mm by ICP-AES (major 

elements) and ICP-MS (trace elements) at the USGS-NRP-CB 

laboratory in Boulder, Colo., according to methods previously 

described by Alpers and others (2005b). Quality-assurance 

data for ICP analyses in bed sediment, including data on 

SRMs and matrix-spike recovery and digest replicate data, 

are presented in appendix tables 3–14 and 3–15. Appendix 

tables 3–14A–E report QAQC data for samples collected 

during 2011, and appendix tables 3–15A–E report QAQC data 

for samples collected during 2012. 

The USGS-NRP-CB laboratory digests sediment samples 

in duplicate and completes analysis in triplicate. Here we 

report the mean concentration of triplicate analysis. When two 

mean concentrations were reported, the NWIS environmental 

database stores the mean concentration data of the first 

digestion, and the NWIS QAQC database contains the mean 

concentration data of the second digestion. The RPD values 

reported in appendix tables 3–14 through 3–15 for digestion 

replicates compare the average concentrations determined for 

each of the two digestions.

Fish Tissue

Fish were analyzed for mercury and selenium. Analytical 

methods and QAQC results for these analytes are described 

below.

Mercury

Fish for analysis were thawed, weighed, and measured. 

Individuals within the human-health-relevant size ranges 

(greater than or equal to approximately 150 mm) were 

analyzed for fresh weight muscle mercury. Muscle samples 

were dissected subcutaneously from the dorsolateral 

(shoulder) region and weighed directly into digestion tubes.

Sample mercury was reduced to the molecular level 

in solution through digestion at 90 °C in a mixture of 

concentrated nitric and sulfuric acids, followed by a second 

stage of heated digestion with the addition of oxidizing 

potassium permanganate. Fully digested samples were 

analyzed for total mercury by standard cold vapor atomic 

absorption (CVAA) spectrophotometry, using a dedicated 

Perkin-Elmer Flow Injection Mercury System (FIMS) with 

an AS-90 autosampler. Quality assurance and quality control 

were employed throughout the analytical process as QAQC 

samples passed through the same digestion process and 

chemical addition as field samples. Routine QAQC included, 

for each batch of 20–60 samples, 8 aqueous mercury standards 

spanning the relevant range of concentrations. For each 

20 analytical samples, the following QAQC samples were 

analyzed: 3 method blanks, 3 certified reference materials, 

3 continuing calibration samples, 1 aqueous mercury 

laboratory calibration standard, 1 sample duplicate (another 

muscle sample dissected from the same fish), 1 sample 

duplicate spiked with mercury, and 1 spike duplicate. 

Results for THg from 27 analyses of two certified reference 

tissues—National Research Council of Canada (NRCC) 

DOLT-4 CRM dogfish liver, 2,580 ng/g mean dry weight, and 

NRCC DORM-3 CRM dogfish muscle, 382 ng/g mean dry 

weight—were within certified or recommended means, and 

ranges had a mean recovery of 99.3 percent with a standard 

deviation (SD) of 2.7 percent. Additionally, 54 within-run 

calibration samples were tested by repeatedly analyzing 

tissue-based samples and had a mean recovery of 98.5 percent 

with an SD of 1.8 percent. Eighteen laboratory calibration 

standards had a mean recovery of 105.6 percent with an SD 

of 1.8 percent. Recovery of mercury from 18 duplicate tissues 

spiked prior to digestion had a mean recovery of 98.0 percent 

with an SD of 1.3 percent. Method precision, determined by 

analyzing 18 duplicate pairs of fish tissue samples, varied from 

0.1 to 6.9 RPD.

Recovery of mercury from 18 tissues spiked prior to 

digestion was 99.3 percent with an SD of 1.9 percent. Overall, 

these quality-control results were well within acceptable limits 

as specified by the UCD laboratory. Results from the fish 

mercury QAQC are presented in appendix table 4–1.
Results 13

Selenium

Fish tissue was analyzed for selenium (Se) at the 

USGS-NRP-WB Biogeochemistry Laboratory using hydride 

generation isotope dilution inductively coupled plasma 

mass spectrometry (HG-ID-ICP-MS) methods. Selenium 

analysis was completed on a subset of fish tissue from fish 

that had also been analyzed for Hg. An amendment with 82Se 

enriched isotope in the form of Se6+ was used for the isotope 

dilution (U.S. Environmental Protection Agency, 2007). This 

method involved a multi-step wet digestion with a mixture 

of nitric acid (HNO3) and hydrogen peroxide (H2O2; Elrick 

and Horowitz, 1985; Liber, 2012) and incubation with a 

pressure-steam sterilizer for 3 hours at 20 pounds per square 

inch and 125 °C. Digestates were subsequently reacted with 

concentrated hydrochloric acid (HCl) to reduce selenium 

to the most favorable Se4+ valence for hydride generation 

(Presser and Barnes, 1984). The solutions were then analyzed 

on a Perkin-Elmer (Elan DRC II) ICP-MS equipped with a 

flow injection system (FIAS-400). Polyatomic, isobaric, and 

background interferences were removed through the use of 

hydride generation and 82Se enriched isotope spike. Qualityassurance data for Se in fish tissue are presented in appendix 

table 4–2. The median Se concentration (n = 6) of the matrix 

blanks was 0.008 μg/g. Recovery of the standard reference 

materials, NIST2976 and DORM-2, ranged from 94.8 to 

104.4 percent, well within the data-quality objectives of the 

study. 

Results

The following section includes text and data tables 

describing surface water, bed sediment, and fish tissue results.

Water

Data for field measurements, laboratory alkalinity, and 

suspended sediment concentration are presented in table 3. 

Data for THg, MeHg, and TSS are presented in table 4. 

Concentrations of dissolved and particulate organic matter, 

particulate inorganic carbon, and total particulate nitrogen are 

presented in table 5. Data for absorbance spectral indicators 

of dissolved organic matter composition are presented in 

table 6; data for fluorescence spectral indicators are in table 7. 

Concentrations of nitrogen species are presented in table 8. 

Concentrations and phosphorus species and concentrations 

of selected anions are presented in table 9. Concentrations of 

selected cations and trace elements from filtered water samples 

are presented in tables 10A–E.

Concentrations of THg-f ranged from 0.04 to 0.86 ng/L 

(table 4). For THg-p, concentrations ranged from less than the 

MDL to 4.06 ng/L (table 4). Concentrations of MeHg-f ranged 

from less than the MDL to 0.044 ng/L (table 4). For MeHg-p, 

concentrations ranged from less than the MDL to 0.053 ng/L 

(table 4). The ratios of MeHg-f to THg-f (%MeHg-f) ranged 

from less than the MDL to 19.2 percent (table 4). In suspended 

particulates, the ratios of MeHg-p to THg-p (%MeHg-p) 

ranged from less than the MDL to 51.7 percent (table 4).

Bed Sediment

Data for THg, MeHg, Fe species, and TRS in the less 

than 2-mm size fraction of sediment are presented in table 11, 

together with dry weight, LOI, and bulk density data; similar 

data for the less than 0.063-mm size class of sediment are 

presented in table 12. Summary statistics of laser diffraction 

analysis for sediment sizes less than 2 mm, including percent 

clay, silt, and sand, and mean and median grain size, are 

presented in table 13. Detailed grain-size distribution data 

(in 1/2-phi intervals) obtained through laser diffraction 

analysis are available in appendix table 3–13. For this report, 

percent clay was calculated as percentage (by weight) of 

bed-sediment material smaller than 0.004 millimeters, percent 

silt was calculated as percentage (by weight) of bed-sediment 

material smaller than 0.0625 mm but larger than 0.0004 mm, 

and percent sand was calculated as percentage (by weight) 

of bed-sediment material smaller than 2 mm but larger than 

0.0625 mm. Summary statistics included in table 13 were 

reported by the analytical instrument software but can be 

calculated using equations from Bunte and Abt (2001). 

Data for major elements and trace elements in the less than 

0.063-mm sediment size class are presented in table 14.

The results of the laser-scattering method (with 

dispersing agent) indicated a median sand content of 

90.1 percent with a range from 64.1 to 96.9 percent (table 13).

Concentrations of THg in bed sediment from 24 sites 

ranged from 1.1 to 381 ng/g (dry weight) in material less than 

2 mm and from 28.1 to 1,410 ng/g (dry weight) in material 

less than 0.063 mm. The ratios of MeHg-s to THg-s (percent 

MeHg-s) ranged from 0.04 to 7.6 percent in the less than 

2-mm streambed sediment.

Fish Tissue

A summary of fish tissue THg concentration data 

by site and species is presented in table 15. Data for THg 

concentration, total length, and weight of individual fish 

are given in table 16. Data for Se in fish tissue are given in 

table 17.

Fish from three species collected at 20 locations had 

the following range in total mercury concentrations (all 

concentrations wet weight): 10 to 292 ng/g in rainbow trout 

(Oncorhynchus mykiss; n = 293, 19 locations); 13 to 386 ng/g 

in brown trout (Salmo trutta; n = 33, 10 locations); and 

159 ng/g in hardhead (Mylopharodon conocephalus; n = 1). 

Concentrations of selenium in fish (dry weight) ranged from 

280 to 1,940 μg/g in rainbow trout (n = 66, 19 locations), and 

from 870 to 1,140 μg/g in brown trout (n = 6, 2 locations). 

The concentrations of selenium in fish converted to wet 

weight using average water content for axial fillet muscle 

tissue for each species (78.21 percent for rainbow trout and 

77.48 percent for brown trout) ranged from 60 to 420 ng/g in 

rainbow trout and from 200 to 260 ng/g in brown trout.
Table 3. Surface-water field measurements, laboratory alkalinity, and suspended sediment concentration. [A, at; AB and ABV, above; Alk, alkalinity; BL and BLW, below; BP, barrometric pressure; C and CRK, Creek; CA, California; CaCO3, calcium carbonate; DO, dissolved oxygenephelometric unit; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake, MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm, millimeter; mm/dd/yyyy, mof mercury; nd, not determined; NF, North Fork; NR, near; PDT, Pacific Daylight Time; PH, Powerhouse; PST, Pacific Standard Time; R, River; RD, Road; S, South; SF, South at 25 degrees Celcius ( ̊C); SS, suspended sediment; SSC, suspended sediment concentration; Temp, temperature; Turb, turbidity; VLY, Valley; WA, Washington; μS/cm, microsthan] Station name Station ID Project ID Latitude Longitude Date (mm/dd/ yyyy) Time (hh:mm) Time datum 

S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 39.35528 –120.81361 09/07/2011 11:10 PST S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 39.31972 –120.65611 09/07/2011 15:20 PST BELDEN PH A BELDEN CA 11403050 SNI-005 40.00750 –121.24972 09/19/2011 15:40 PDT SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 40.02472 –120.96861 09/20/2011 10:50 PDT SPANISH CREEK NR EAST QUINCY CA 395830120542501 SNI-007 39.97500 –120.90694 09/20/2011 16:00 PDT MF FEATHER R A SLOAT CA 11393000 SNI-009 39.85694 –120.56806 09/21/2011 12:30 PDT MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 39.77972 –120.52917 09/22/2011 13:00 PDT MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 37.67139 –119.78972 11/02/2011 13:00 PDT MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 37.61028 –119.96056 11/03/2011 11:00 PST MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 38.56750 –120.45583 08/30/2012 14:30 PST WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 39.16528 –121.06139 09/06/2012 14:30 PST S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 39.12278 –121.02750 09/06/2012 16:00 PST S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 39.31972 –120.65611 09/20/2012 11:30 PDT SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 39.29833 –120.84667 09/25/2012 13:10 PST S YUBA R NR CISCO CA 11414000 SNI-046 39.32139 –120.56333 09/25/2012 15:00 PDT FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 39.35611 –120.61250 10/01/2012 13:40 PST MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 38.60889 –120.61417 10/03/2012 12:00 PST SPANISH CREEK BLW CLEAR C NR KEDDIE CA 11403050 SNI-049 40.02472 –120.46861 10/16/2012 10:20 PDT BELDEN PH A BELDEN CA 400129120580701 SNI-050 40.00750 –121.23167 10/16/2012 14:50 PDT SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 39.67611 –121.08833 10/17/2012 12:00 PST SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 39.55056 –121.21250 10/31/2012 11:10 PST MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 39.71028 –121.27167 10/31/2012 14:30 PST MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 39.86139 –120.84694 11/07/2012 14:30 PST SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 38.77611 –120.74806 11/14/2012 11:30 PST SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 38.75722 –120.27472 11/14/2012 15:00 PST NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 39.02222 –120.72111 11/15/2012 11:20 PST RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 38.99917 –120.72333 11/15/2012 13:20 PST 
Station

name

Station 

ID

Project

ID Latitude Longitude

Date

(mm/dd/

yyyy)

Time

(hh:mm)

Time 

datum

S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 39.35528 –120.81361 09/07/2011 11:10 PST S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 39.31972 –120.65611 09/07/2011 15:20 PST BELDEN PH A BELDEN CA 11403050 SNI-005 40.00750 –121.24972 09/19/2011 15:40 PDT SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 40.02472 –120.96861 09/20/2011 10:50 PDT SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 39.97500 –120.90694 09/20/2011 16:00 PDT MF FEATHER R A SLOAT CA 11393000 SNI-009 39.85694 –120.56806 09/21/2011 12:30 PDT MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 39.77972 –120.52917 09/22/2011 13:00 PDT MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 37.67139 –119.78972 11/02/2011 13:00 PDT MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 37.61028 –119.96056 11/03/2011 11:00 PST MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 38.56750 –120.45583 08/30/2012 14:30 PST WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 39.16528 –121.06139 09/06/2012 14:30 PST S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 39.12278 –121.02750 09/06/2012 16:00 PST S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 39.31972 –120.65611 09/20/2012 11:30 PDT SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 39.29833 –120.84667 09/25/2012 13:10 PST S YUBA R NR CISCO CA 11414000 SNI-046 39.32139 –120.56333 09/25/2012 15:00 PDT FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 39.35611 –120.61250 10/01/2012 13:40 PST MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 38.60889 –120.61417 10/03/2012 12:00 PST SPANISH CREEK BLW CLEAR C NR KEDDIE CA 11403050 SNI-049 40.02472 –120.46861 10/16/2012 10:20 PDT BELDEN PH A BELDEN CA 400129120580701 SNI-050 40.00750 –121.23167 10/16/2012 14:50 PDT SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 39.67611 –121.08833 10/17/2012 12:00 PST SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 39.55056 –121.21250 10/31/2012 11:10 PST MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 39.71028 –121.27167 10/31/2012 14:30 PST MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 39.86139 –120.84694 11/07/2012 14:30 PST SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 38.77611 –120.74806 11/14/2012 11:30 PST SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 38.75722 –120.27472 11/14/2012 15:00 PST NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 39.02222 –120.72111 11/15/2012 11:20 PST RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 38.99917 –120.72333 11/15/2012 13:20 PST 

Table 3. Surface-water field measurements, laboratory alkalinity, and suspended sediment concentration.—Continued[A, at; AB and ABV, above; Alk, alkalinity; BL and BLW, below; BP, barrometric pressure; C and CRK, Creek; CA, California; CaCO3, calcium carbonate; DO, dissolved oxygenephelometric unit; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake, MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm, millimeter; mm/dd/yyyy, mof mercury; nd, not determined; NF, North Fork; NR, near; PDT, Pacific Daylight Time; PH, Powerhouse; PST, Pacific Standard Time; R, River; RD, Road; S, South; SF, South at 25 degrees Celcius ( ̊C); SS, suspended sediment; SSC, suspended sediment concentration; Temp, temperature; Turb, turbidity; VLY, Valley; WA, Washington; μS/cm, microsthan]
Station name Station ID Project ID Latitude Longitude Date (mm/dd/yyyy) Time (hh:mm) Tim

dat

S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 39.35528 –120.81361 09/07/2011 11:10 PSS YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 39.31972 –120.65611 09/07/2011 15:20 PSBELDEN PH A BELDEN CA 11403050 SNI-005 40.00750 –121.24972 09/19/2011 15:40 PDSPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 40.02472 –120.96861 09/20/2011 10:50 PDSPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 39.97500 –120.90694 09/20/2011 16:00 PDMF FEATHER R A SLOAT CA 11393000 SNI-009 39.85694 –120.56806 09/21/2011 12:30 PDMF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 39.77972 –120.52917 09/22/2011 13:00 PDMERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 37.67139 –119.78972 11/02/2011 13:00 PDMERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 37.61028 –119.96056 11/03/2011 11:00 PSMF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 38.56750 –120.45583 08/30/2012 14:30 PSWOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 39.16528 –121.06139 09/06/2012 14:30 PSS WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 39.12278 –121.02750 09/06/2012 16:00 PSS YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 39.31972 –120.65611 09/20/2012 11:30 PDSF DEER C NR WASHINGTON CA 391754120504801 SNI-045 39.29833 –120.84667 09/25/2012 13:10 PSS YUBA R NR CISCO CA 11414000 SNI-046 39.32139 –120.56333 09/25/2012 15:00 PDFORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 39.35611 –120.61250 10/01/2012 13:40 PSMF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 38.60889 –120.61417 10/03/2012 12:00 PSSPANISH CREEK BLW CLEAR C NR KEDDIE CA 11403050 SNI-049 40.02472 –120.46861 10/16/2012 10:20 PDBELDEN PH A BELDEN CA 400129120580701 SNI-050 40.00750 –121.23167 10/16/2012 14:50 PDSF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 39.67611 –121.08833 10/17/2012 12:00 PSSF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 39.55056 –121.21250 10/31/2012 11:10 PSMF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 39.71028 –121.27167 10/31/2012 14:30 PSMF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 39.86139 –120.84694 11/07/2012 14:30 PSSF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 38.77611 –120.74806 11/14/2012 11:30 PSSILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 38.75722 –120.27472 11/14/2012 15:00 PSNF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 39.02222 –120.72111 11/15/2012 11:20 PSRUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 38.99917 –120.72333 11/15/2012 13:20 PS

Table 3. Surface-water field measurements, laboratory alkalinity, and suspended sediment concentration.—Continued[A, at; AB and ABV, above; Alk, alkalinity; BL and BLW, below; BP, barrometric pressure; C and CRK, Creek; CA, California; CaCO3, calcium carbonate; DO, dissolved oxygenephelometric unit; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake, MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm, millimeter; mm/dd/yyyy, mof mercury; nd, not determined; NF, North Fork; NR, near; PDT, Pacific Daylight Time; PH, Powerhouse; PST, Pacific Standard Time; R, River; RD, Road; S, South; SF, South at 25 degrees Celcius ( ̊C); SS, suspended sediment; SSC, suspended sediment concentration; Temp, temperature; Turb, turbidity; VLY, Valley; WA, Washington; μS/cm, microsthan]
Table 4. Surface-water concentrations of mercury, methylmercury, and total suspended solids.[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: (Me/T)-f, ratio of methylmercury to total mercury in filtered samethylmercury to total mercury in particulate samples; A, at; AB and ABV, above; BL and BLW, below; CA, California; C and CRK, Creek; E, estimated value (between metholowest standard; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MeHg-f, filtered methylmercury; MeHg-p, particulate methylmercury; MF, Middle Fork; Mliter; mm/dd/yyyy, month/day/year; nd, not determined; NF, North Fork; ng/L, nanogram per liter; NR, near; pg, picogram; PH, Powerhouse; R, River; RD, Road; S, South; SF, mercury; THg‐p, particulate total mercury; TSS, total suspended solids; VLY, Valley; VOL, volume; WA, Washington; <, less than; —, not applicable]

Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

(hh:mm)

Param

(paramet

THg-f

(50287)

(ng/L)

T

(6

(

Method detection limit 0.04 (2011), 0.06 (2012) 0.04 

0.0

S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 E0.50 ES YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 0.69 EBELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 <MDL ESPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 E0.25 ESPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 E0.17 EMF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 E0.47 EMF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 E0.26 EMERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 E0.06 EMERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 E0.22 <MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 E0.20 EWOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 0.85 S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 E0.48 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 E0.31 ESF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 E0.28 ES YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 E0.21 EFORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 E0.31 EMF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 E0.17 <SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 0.33 EBELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 E0.09 <SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 E0.16 <SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 E0.15 EMF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 E0.28 EMF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 0.59 ESF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 E0.38 ESILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 E0.35 <NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 E0.28 ERUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 E0.23 <
Station name Station ID Project ID Date (mm/dd/yyyy) Time (hh:mm) Param

(paramete

MeHg-p (62977) (ng/L) (Me/T)-f (—) (percent) 

Method detection limit 0.12 pg/filter, 0.004 ng/L nd S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 0.012 5.5 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 E0.005 4.7 BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 E0.004 10.8 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 0.019 15.5 SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 0.014 14.2 MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 0.013 9.3 MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 0.011 8.2 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 0.007 19.2 MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 E0.005 5.1 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 0.007 18.2 WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 0.053 3.9 S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 NO VOL 8.7 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 E0.004 1.9 SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 E0.2 5.6 S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 0.008 8.7 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 E0.006 2.4 MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 0.006 12.5 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 0.009 8.1 BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 0.005 6.2 SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 E0.005 0.8 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 0.006 2.5 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 0.010 4.3 MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 E0.009 5.5 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 <0.005 1.8 SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 <0.005 4.3 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 <0.005 2.7 RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 <0.005 nd 

1 TSS is presented here as the mean value of the THg-p TSS and the MeHg-p TSS.

Table 4. Surface-water concentrations of mercury, methylmercury, and total suspended solids.—Continued[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: (Me/T)-f, ratio of methylmercury to total mercury in filtered samethylmercury to total mercury in particulate samples; A, at; AB and ABV, above; BL and BLW, below; CA, California; C and CRK, Creek; E, estimated value (between metholowest standard; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MeHg-f, filtered methylmercury; MeHg-p, particulate methylmercury; MF, Middle Fork; Mliter; mm/dd/yyyy, month/day/year; nd, not determined; NF, North Fork; ng/L, nanogram per liter; NR, near; pg, picogram; PH, Powerhouse; R, River; RD, Road; S, South; SF, mercury; THg‐p, particulate total mercury; TSS, total suspended solids; VLY, Valley; VOL, volume; WA, Washington; <, less than; —, not applicable]
Table 5. Surface-water concentrations of dissolved and particulate organic matter, particulate inorganic carbon, total particulate nitrogen, chloroph[Dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) were measured at the U.S. Geological Survey (USGS) California Water Science Center; all other parameteNational Water Quality Laboratory. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; C and CRK, Creek; CA, Califonria; Chl, chlorophyll a; CRK, Creek; E, esdetection limit [MDL] and lowest standard); hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm/dd/determined; NF, North Fork; NR, near; Pheo, pheophytin a; PH, Powerhouse; PIC, particulate inorganic carbon; POC, particulate organic carbon; R, River; RD, Road; S, South; particulate carbon; TPN, total particulate nitrogen; VLY, Valley; WA, Washington; μg/L, microgram per liter; <, less than]

Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

(hh:mm)

Param

(paramete

DOC

(00681)

(mg/L)

Chl

(70953)

(μg/L)

Pheo

(62360)

(μg/L)

PIC

(0068

(mg/

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 1.0 <0.1 0.31 <0.0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 0.59 E0.1 0.24 <0.0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 0.45 nd nd <0.0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 0.85 nd nd <0.0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 0.73 nd nd <0.0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 1.6 nd nd <0.0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 3.3 nd nd <0.0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 0.82 nd nd <0.0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 0.67 nd nd <0.0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 0.62 nd nd nd WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 1.3 nd nd nd S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 1.5 nd nd nd S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 1.1 nd nd <0.0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 1.3 nd nd <0.0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 1.1 nd nd 0.0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 1.4 nd nd <0.0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 0.75 nd nd nd BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 1.1 nd nd <0.0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 0.57 nd nd <0.0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 1.1 nd nd <0.0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 0.80 0.63 0.48 <0.0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 1.1 0.87 1.3 <0.0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 1.7 0.48 0.78 <0.0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 1.3 1.1 1.1 <0.0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 1.3 E0.13 E0.12 <0.0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 0.52 <0.1 E0.16 <0.0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 0.57 <0.1 0.21 <0.0
Table 6. Absorbance spectral indicators of dissolved organic matter composition in surface water. [All analyses performed at U.S. Geological Survey California Water Science Center. Abbreviations: A, at; Axxx, absorbance at xxx nanometer (nm); AB and ABV, above; AU, aa 1-centimeter pathlength; BL and BLW, below; C and CRK, Creek; CA, California; E, estimated value (between method detection limit [MDL] and lowest standard); hh:mm, hID, identification; L mg–1m–1, liter per milligram per meter; LK, Lake; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; nd, not determined; NF, North Fork; NR, near; RD, Road; S, South; Sag, spectral slope for given range of wavelengths; SF, South Fork; SUVA254, specific absorbance at 254 nm; VLY, Valley; WA, Washington; <, less than] Station name Station ID Project ID Date (mm/dd/yyyy) Time (hh:mm) Param

(paramet

A254 (50624) (AU) A280 (32296) (AU) A370 (32297

(AU) 

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 0.036 0.027 E0.00S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 E0.014 E0.011 E0.00BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 0.016 E0.012 E0.00SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 0.031 0.024 E0.00SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 0.028 0.022 E0.00MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 0.055 0.041 0.01MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 0.098 0.071 0.01MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 0.020 0.015 E0.00MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 0.021 0.016 E0.00MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 0.017 0.013 E0.00WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 0.037 0.029 E0.00S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 0.071 0.056 0.01S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 0.041 0.031 E0.00SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 0.032 0.023 E0.00S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 0.024 0.018 E0.00FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 0.026 0.017 E0.00MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 0.022 0.017 E0.00BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 0.031 0.025 E0.00SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 0.017 0.014 E0.00SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 E0.015 E0.01 E0.00SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 0.018 0.013 E0.00MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 0.041 0.032 E0.00MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 0.052 0.039 E0.00SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 0.038 0.028 E0.00SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 0.035 0.026 E0.00NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 0.016 0.013 E0.00RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 E0.014 E0.010 E0.00
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

(hh:mm)

Paramete

63162 32300 3230

SUVA254

(L mg–1m–1) Sag275-290 Sag290-

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 3.5 0.015 E0.01S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 2.4 E0.015 <0.01BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 3.5 E0.014 <0.01SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 3.6 0.013 E0.01SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 3.8 0.012 E0.01MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 3.5 0.015 E0.01MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 2.9 0.018 0.01MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 2.5 E0.014 <0.01MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 3.1 E0.014 <0.01MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 2.8 E0.013 <0.01Wolf C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 2.9 0.013 E0.01S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 4.8 0.012 0.01S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 3.8 0.013 E0.01SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 2.5 0.019 <0.01S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 2.3 E0.016 <0.01FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 1.9 E0.023 <0.02MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 3.0 E0.012 <0.01BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 2.9 0.013 E0.01SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 3.0 E0.014 <0.01SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 1.4 <0.026 <0.01SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 2.3 E0.017 <0.01MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 3.6 0.013 E0.01MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 3.1 0.016 E0.01SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 2.9 0.016 E0.01SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 2.8 0.016 E0.01NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 3.2 E0.012 <0.01RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 2.4 <0.016 <0.01

Table 6. Absorbance spectral indicators of dissolved organic matter composition in surface water.—Continued[All analyses performed at U.S. Geological Survey California Water Science Center. Abbreviations: A, at; Axxx, absorbance at xxx nanometer (nm); AB and ABV, above; AU, aa 1-centimeter pathlength; BL and BLW, below; C and CRK, Creek; CA, California; E, estimated value (between method detection limit [MDL] and lowest standard); hh:mm, hID, identification; L mg–1m–1, liter per milligram per meter; LK, Lake; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; nd, not determined; NF, North Fork; NR, near; RD, Road; S, South; Sag, spectral slope for given range of wavelengths; SF, South Fork; SUVA254, specific absorbance at 254 nm; VLY, Valley; WA, Washington; <, less than]
Table 7. Fluorescence spectral indicators of dissolved organic matter composition in surface water. [All analyses performed at the U.S. Geological Survey California Water Science Center. Peaks A, C, M, D, and B from Coble and others (1990), Coble (1996), and Stedmon and Coble and others (1998); fdom from Downing and others (2009). Abbreviations: A, at; AB and ABV, above; BL and BLW, below; C and CRK, Creek; CA, California; E, estimdetection limit (MDL) and lowest standard); fdom, fluorescence of dissolved organic matter; FI, fluorescence index, from Cory and McKnight (2005); hh:mm, hour:minute; HIX(2002); HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; NF, North Fork; NR, near; PH, Powerhouse; R, River; RD, Roof peaks at excitation-emission (ex-em) pairs are based on Stedmon and others (2003); S, South; SF, South Fork; VLY, Valley; WA, Washington; <, less than] Station name Station ID Project ID Date (mm/dd/yyyy) Time (hh:mm) Param

32304 32332 323

peak A ex- 260em450 (RU) peak C ex- 340em440 (RU) peak 

ex

300em

(RU

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 0.21 0.12 0.0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 0.08 0.04 E0.0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 0.10 0.05 0.0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 0.18 0.09 0.0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 0.15 0.08 0.0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 0.36 0.18 0.1MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 0.67 0.33 0.3MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 0.11 0.07 0.0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 0.10 0.06 0.0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 0.07 0.04 E0.0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 0.19 0.12 0.1S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 0.30 0.16 0.1S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 0.20 0.11 0.0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 0.14 0.07 0.0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 0.10 0.05 0.0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 0.10 0.05 0.0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 0.07 0.05 E0.0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 0.15 0.08 0.0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 0.08 0.04 E0.0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 0.06 0.03 E0.0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 0.07 0.04 E0.0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 0.15 0.08 0.0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 0.29 0.15 0.1SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 0.17 0.09 0.0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 0.13 0.07 0.0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 0.05 0.03 E0.0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 0.05 0.03 E0.0
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

(hh:mm)

Param

32311 32310 

peak T

ex275em340

(RU)

peak N

ex280em370

(RU)

ex

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 E0.04 0.05 

S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 E0.03 E0.03 BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 E0.03 E0.03 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 0.09 0.08 SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 E0.06 0.06 MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 0.08 0.12 MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 0.18 0.23 MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 E0.02 E0.04 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 E0.03 E0.04 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 E0.03 E0.03 WOlF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 0.10 0.10 S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 0.09 0.11 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 E0.05 0.07 SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 E0.05 0.06 S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 E0.05 E0.05 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 E0.04 E0.04 MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 E0.04 E0.04 BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 E0.07 0.06 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 E0.06 E0.04 SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 E0.06 E0.04 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 E0.04 E0.04 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 E0.04 0.06 MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 0.08 0.10 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 E0.04 0.06 SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 E0.05 E0.05 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 E0.02 E0.02 RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 E0.02 E0.02 

Table 7. Fluorescence spectral indicators of dissolved organic matter composition in surface water.—Continued[All analyses performed at the U.S. Geological Survey California Water Science Center. Peaks A, C, M, D, and B from Coble and others (1990), Coble (1996), and Stedmon and Coble and others (1998); fdom from Downing and others (2009). Abbreviations: A, at; AB and ABV, above; BL and BLW, below; C and CRK, Creek; CA, California; E, estimdetection limit (MDL) and lowest standard); fdom, fluorescence of dissolved organic matter; FI, fluorescence index, from Cory and McKnight (2005); hh:mm, hour:minute; HIX(2002); HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; NF, North Fork; NR, near; PH, Powerhouse; R, River; RD, Roof peaks at excitation-emission (ex-em) pairs are based on Stedmon and others (2003); S, South; SF, South Fork; VLY, Valley; WA, Washington; <, less than]
Table 8. Surface-water concentration of nitrogen species. [All analyses performed at U.S. Geological Survey National Water Quality Laboratory, Denver, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; C af-, filtered; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; N, nitrogenNF, North Fork; NH3, ammonia; NH4+, ammonium; NO2–, nitrite; NO3–, nitrate; Norg, organic nitrogen; NR, near; PH, Powerhouse; R, River; RD, Road; S, South; SF, South ForWA, Washington; <, less than] Station name Station ID Project ID Date (mm/dd/ yyyy) Time (hh:mm) Parame

(parameter 

NH3+Norg, f- (00623) (mg/L as N) NH3+Norg, u- (00625) (mg/L as N) NO

(00

(m

as 

S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 <0.05 0.06 <0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 <0.05 0.07 0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 <0.05 <0.05 <0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 0.16 0.15 <0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 0.07 0.05 <0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 0.14 0.12 <0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 0.29 0.29 <0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 <0.07 0.07 <0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 0.09 <0.07 <0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 <0.07 <0.07 <0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 0.13 0.16 0S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 0.11 0.17 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 0.07 0.10 0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 <0.07 0.14 <0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 0.09 0.13 <0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 <0.07 <0.07 <0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 nd nd nSPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 0.09 0.11 <0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 <0.07 <0.07 <0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 0.09 <0.07 <0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 <0.07 <0.07 <0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 <0.07 0.10 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 0.13 0.11 <0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 0.09 0.10 <0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 0.11 0.08 <0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 <0.07 <0.07 <0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 <0.07 <0.07 <0
Table 9. Surface-water concentrations of phosphorus species, sulfate, and chloride.[All analyses performed at U.S. Geological Survey National Water Quality Laboratory, Denver, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; C aCl–, chloride; f-orthoP, filtered ortho-phosphate; f-TP, filtered total phosphorus; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; mg/L, milmm/dd/yyyy, month/day/year; nd, not determined; NF, North Fork; NR, near; PH, Powerhouse; PST, Pacific Standard Time; R, River; RD, Road; S, South; SF, South Fork; SO42phosphorus; VLY, Valley; WA, Washington; < less than]

Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Param

(paramet

u-TP

(00665)

(mg/L)

f-TP

(00666)

(mg/L)

f-orth

(006

(mg/L 

S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 <0.004 <0.003 0.00S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 0.004 <0.003 <0.00BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 0.013 0.009 0.01SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 0.009 <0.003 0.00SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 0.008 0.003 0.00MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 0.023 0.013 0.01MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 0.022 0.011 0.00MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 0.005 <0.003 0.00MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 <0.004 <0.003 0.00MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 0.011 0.008 0.01WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 0.22 0.195 0.19 S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 0.014 0.007 0.00S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 <0.004 <0.003 <0.00SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 0.005 0.003 <0.00S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 0.005 <0.003 <0.00FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 <0.004 <0.003 0.01MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 nd nd nd SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 0.005 <0.003 <0.00BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 0.015 0.01 0.01SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 <0.004 <0.003 <0.00SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 0.005 <0.003 <0.00MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 0.013 0.006 0.00MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 0.017 0.013 0.01SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 0.020 <0.003 <0.00SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 0.006 <0.003 0.00NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 0.006 <0.003 0.00RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 >0.004 <0.003 0.00
Table 10A. Surface-water concentrations of selected cations and trace elements. [The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; AAl, aluminum; As, arsenic; B, boron; Ba, barium; Be, beryllium; Bi, bismuth; BL and BLW, below; C and CRK, Creek; Ca, calcium; CA, California; Cd, cadmium; Ce, cerium; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; NF, North FoPST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of bla“V” code.) VLY, Valley; WA, Washington; μg/L, microgram per liter; <, less than] Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

Al (01106) 

(μg/L) Q/R (

2011 MDL 0.042 — 02012 MDL 0.52 — 0UCL 80 (mean+UCL 80) 0.62 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 8.9 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 8.3 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 8.5 — 0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 2.2 — 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 1.4 — 0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 1.6 — 0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 3.1 — 0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 5.2 — 0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 5.2 — 0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 5.0 — 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 5.3 — 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 4.6 — 0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 27 — 0S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 13 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 6.0 — 0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 5.7 — 0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 9.9 — 0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 21 — 0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 3.5 — 0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 1.9 — 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 1.4 — 0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 4.1 — 0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 2.5 — 0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 12 — 1MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 7.9 — 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 8.2 — 0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 7.0 — 0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 6.5 — 0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 2.9 — 0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 2.2 — 0
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

Ba

(01005)

(μg/L) Q/R (

2011 MDL 0.0037 — 02012 MDL 0.0044 — 0UCL 80 (mean+UCL 80) 16 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 4.9 V 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 17 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 17 — 0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 8.5 V 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 23 — 0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 21 — 0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 18 — 0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 22 — 0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 30 — 0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 7.5 V 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 16 — 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 17 — 0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 77 — 0S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 41 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 49 — 0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 30 — 0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 31 — 0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 4.1 V 0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 34 — 0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 9.4 V 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 24 — 0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 30 — 0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 19 — 0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 26 — 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 28 — 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 32 — 0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 27 — 0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 24 — 0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 22 — 0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 34 — 0

Table 10A. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; AAl, aluminum; As, arsenic; B, boron; Ba, barium; Be, beryllium; Bi, bismuth; BL and BLW, below; C and CRK, Creek; Ca, calcium; CA, California; Cd, cadmium; Ce, cerium; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; NF, North FoPST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of bla“V” code.) VLY, Valley; WA, Washington; μg/L, microgram per liter; <, less than]
Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

Ca (00915) 

(mg/L) Q/

2011 MDL 0.0078 — 2012 MDL 0.0033 — UCL 80 (mean+UCL 80) 0.013 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 2.6 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 8.3 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 8.4 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 13 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 15 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 14 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 17 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 11 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 7.7 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 3.5 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 4.2 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 4.2 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 7.4 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 9.7 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 5.0 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 3.5 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 2.1 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 1.9 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 5.7 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 14 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 19 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 2.9 — SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 3.9 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 17 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 18 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 18 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 3.1 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 3.3 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 8.9 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 6.2 — 

Table 10A. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; AAl, aluminum; As, arsenic; B, boron; Ba, barium; Be, beryllium; Bi, bismuth; BL and BLW, below; C and CRK, Creek; Ca, calcium; CA, California; Cd, cadmium; Ce, cerium; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; NF, North FoPST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of bla“V” code.) VLY, Valley; WA, Washington; μg/L, microgram per liter; <, less than]
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

Ce 

(01110)

(μg/L) Q

2011 MDL 0.00015 — 2012 MDL 0.00020 — UCL 80 (mean+UCL 80) 0.00020 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.011 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.010 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0098 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.0024 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.011 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.013 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.010 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.021 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0073 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.0098 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0068 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0059 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.026 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.025 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.011 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0092 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.020 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.026 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0069 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.0027 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.011 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.0019 — SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.0040 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0060 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.015 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.017 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.024 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.014 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.0025 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0036 — 

Table 10A. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; AAl, aluminum; As, arsenic; B, boron; Ba, barium; Be, beryllium; Bi, bismuth; BL and BLW, below; C and CRK, Creek; Ca, calcium; CA, California; Cd, cadmium; Ce, cerium; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; NF, North FoPST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of bla“V” code.) VLY, Valley; WA, Washington; μg/L, microgram per liter; <, less than]
Table 10B. Surface-water concentrations of selected cations and trace elements. [The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; Cr, chromium; Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbium; Eu, europium; Fe, iron; Gd, gadolinium; Ho, holmium; HLK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; na, not applicable; NF, North Fork; NR, near; PH, Powerhouse; Q/R, qualifier oname); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; data; <, less than] Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate 

(pa

Cr (01030) 

(μg/L) Q

2011 MDL 0.050 — 2012 MDL 0.044 — UCL 80 (mean+UCL 80) 0.049 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.050 S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.24 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.26 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.24 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.23 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.20 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.17 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.050 MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.050 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.050 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.044 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.044 WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.21 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.16 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.21 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.066 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.69 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.20 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.19 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.23 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.21 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.73 — SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.89 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.99 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.43 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.19 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 1.2 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.22 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.37 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.044 
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

(pa

Cu

(01040)

(μg/L) Q

2011 MDL 0.0078 — 2012 MDL 0.0091 — UCL 80 (mean+UCL 80) 0.22 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.45 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.47 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.45 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.17 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.29 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.22 MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.38 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.58 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.22 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.084 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.14 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.13 WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 1.1 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.61 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.44 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.34 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.25 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.28 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.20 BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.21 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.34 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.15 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.35 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 2.1 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.46 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.44 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.34 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.18 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.21 RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.33 — 

Table 10B. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; Cr, chromium; Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbium; Eu, europium; Fe, iron; Gd, gadolinium; Ho, holmium; HLK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; na, not applicable; NF, North Fork; NR, near; PH, Powerhouse; Q/R, qualifier oname); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; data; <, less than]
Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate 

(pa

Er (50573) 

(μg/L) 

2011 MDL 0.000091 2012 MDL 0.00028 UCL 80 (mean+UCL 80) na S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.0021 S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.0019 S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0020 BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.0008 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.0009 SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.0010 MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.0013 MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.0016 MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0009 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.0006 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0011 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0009 WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.0057 S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.0018 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.0019 SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0014 S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.0021 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.0017 MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0006 BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.0006 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.0012 SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.0003 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.0007 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0012 MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.0014 MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.0016 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.0018 SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.0018 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.0011 RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0010 

Table 10B. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; Cr, chromium; Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbium; Eu, europium; Fe, iron; Gd, gadolinium; Ho, holmium; HLK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; na, not applicable; NF, North Fork; NR, near; PH, Powerhouse; Q/R, qualifier oname); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; data; <, less than]
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

(p

Gd

(50575)

(μg/L) Q/R 

2011 MDL 0.000066 — 2012 MDL 0.000077 — UCL 80 (mean+UCL 80) 0.000089 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.0022 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.0048 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0044 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.0009 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.0019 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.0020 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.0019 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.0032 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0011 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.0012 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0019 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0018 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.037 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.0038 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.0023 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0013 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.0022 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.0033 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0012 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.0010 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.0029 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.00036 — SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.00093 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0024 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.0026 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.0028 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.0042 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.0016 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.0019 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0023 — 

Table 10B. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; Cr, chromium; Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbium; Eu, europium; Fe, iron; Gd, gadolinium; Ho, holmium; HLK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, milligram per liter; MI, mile; na, not applicable; NF, North Fork; NR, near; PH, Powerhouse; Q/R, qualifier oname); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; data; <, less than]
Table 10C. Surface-water concentrations of selected cations and trace elements. [The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; La, lanthanum; Li, lithium; LK, Lake; Lu, lutetium; MDL, method dMg, magnesium; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; Mn, manganese; Mo, molybdenum; Na, sodium; Nd, neodymium; NF, North Fork; Ni, nickPb, lead; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than] Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

La (01180) 

(μg/L) Q/R (

2011 MDL 0.00008 — 02012 MDL 0.00003 — 0UCL 80 (mean+UCL 80) 0.00025 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.011 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.0094 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0090 — 0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.0025 — 1SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.0066 — 0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.0072 — 0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.0062 — 0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.012 — 0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0077 — 1MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.011 — 1MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0059 — 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0061 — 0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.018 — 0S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.014 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.011 — 0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0072 — 0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.013 — 0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.019 — 0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0061 — 0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.0024 — 1SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.0062 — 6SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.0018 — 0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.0037 — 0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0043 — 2MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.0099 — 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.010 — 0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.023 — 0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.014 — 5NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.0060 — 0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0091 — 0
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

Mg

(00925)

(mg/L) Q/R (

2011 MDL 0.0037 — 02012 MDL 0.0007 — 0UCL 80 (mean+UCL 80) 0.0036 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.34 — 6S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 3.3 — 2S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 3.2 — 2BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 6.1 — 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 7.0 — 9SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 6.8 — 30 MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 3.6 — 6MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 3.6 — 3MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 1.5 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.49 — 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 1.3 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 1.2 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 2.0 — 9S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 4.5 — 4S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.56 — 4SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.57 — 3S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.42 — 4FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.30 — 7MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 1.5 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 7.2 — 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 8.3 — 6SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.99 — 8SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 1.5 — 28 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 4.5 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 4.7 — 6MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 4.7 — 6SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.90 — 2SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 1.0 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 2.2 — 0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 1.2 — 0

Table 10C. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; La, lanthanum; Li, lithium; LK, Lake; Lu, lutetium; MDL, method dMg, magnesium; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; Mn, manganese; Mo, molybdenum; Na, sodium; Nd, neodymium; NF, North Fork; Ni, nickPb, lead; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than]
Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

Na (00930) 

(mg/L) Q/R (

2011 MDL 0.0025 — 0.2012 MDL 0.016 — 0.UCL 80 (mean+UCL 80) 0.017 — 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 1.1 — 0.S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 2.4 — 0.S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 2.4 — 0.BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 4.0 — 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 5.7 — 0.SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 5.4 — 0.MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 4.3 — 0.MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 5.0 — 0.MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 3.2 — 0.MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 2.2 — 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 2.7 — 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 2.7 — 0.WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 4.3 — 0.S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 3.8 — 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 2.1 — 0.SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 1.3 — 0.S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 4.3 — 0.FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.71 — 0.MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 2.5 — 0.BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 5.1 — 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 9.8 — 0.SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 1.3 — 0.SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 2.0 — 0.MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 5.1 — 0.MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 5.9 — 0.MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 5.9 — 0.SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 2.0 — 0.SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 2.8 — 0.NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 2.0 — 0.RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 2.7 — 0.

Table 10C. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; La, lanthanum; Li, lithium; LK, Lake; Lu, lutetium; MDL, method dMg, magnesium; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; Mn, manganese; Mo, molybdenum; Na, sodium; Nd, neodymium; NF, North Fork; Ni, nickPb, lead; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than]
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

P

(01072)

(μg/L) Q/R 

2011 MDL 0.58 — 

2012 MDL 0.64 — UCL 80 (mean+UCL 80) 0.76 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.58 < S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 2.3 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 1.7 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 8.5 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 1.2 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.78 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 14 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 9.9 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 4.3 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.58 < MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 8.7 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 7.8 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 190 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 5.1 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.64 < SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 1.4 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 1.9 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 2.1 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 2.2 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 13 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 2.0 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 1.3 — SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 1.5 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 4.6 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 12 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 12 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.82 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 3.0 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 3.5 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 1.3 — 

Table 10C. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; La, lanthanum; Li, lithium; LK, Lake; Lu, lutetium; MDL, method dMg, magnesium; mg/L, milligram per liter; MI, mile; mm/dd/yyyy, month/day/year; Mn, manganese; Mo, molybdenum; Na, sodium; Nd, neodymium; NF, North Fork; Ni, nickPb, lead; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SF, South Fork; UCL 80, upper confidence (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than]
Table 10D. Surface-water concentrations of selected cations and trace elements. [The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, mmm/dd/yyyy, month/day/year; na, not available; NF, North Fork; NR, near; PH, Powerhouse; Pr, praseodymium; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, RRb, rubidium; RD, Road; Re, rhenium; S, South (station name); S, sulfur; Sb, antimony; Se, selenium; SF, South Fork; SiO2, silica; Sm, samarium; Sn, tin; Sr, strontium; Tb, terlimit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than] Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

Pr (50582) 

(μg/L) Q/R 

2011 MDL 0.000047 — 2012 MDL 0.00010 — UCL 80 (mean+UCL 80) 0.000081 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.0031 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.0027 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0026 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.00068 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.0018 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.0018 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.0016 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.0032 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0016 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.0022 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0016 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0015 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.0057 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.0037 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.0027 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0018 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.0033 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.0049 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0012 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.00082 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.0017 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.00021 — SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.00074 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0014 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.0025 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.0015 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.0051 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.0033 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.0016 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0019 — 
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

S

(50932)

(mg/L) Q/R (

2011 MDL 0.063 — 02012 MDL 0.057 — 0UCL 80 (mean+UCL 80) 0.062 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.29 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 1.8 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 1.7 — 0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.55 — 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 1.5 — 0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 1.4 — 0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 1.4 — 0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 1.0 — 0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 1.2 — 0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.27 — 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.55 — 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.49 — 0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 1.8 — 0S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 1.0 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.66 — 0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.46 — 0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.49 — 0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.16 — 0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.59 — 0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.67 — 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 2.1 — 0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.12 — 0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.43 — 0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 2.9 — 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 2.0 — 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.49 — 0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.31 — 0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.16 — 0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 1.9 — 0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.76 — 0

Table 10D. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, mmm/dd/yyyy, month/day/year; na, not available; NF, North Fork; NR, near; PH, Powerhouse; Pr, praseodymium; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, RRb, rubidium; RD, Road; Re, rhenium; S, South (station name); S, sulfur; Sb, antimony; Se, selenium; SF, South Fork; SiO2, silica; Sm, samarium; Sn, tin; Sr, strontium; Tb, terlimit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than]
Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

SiO2 (00955) 

(mg/L) Q/R (

2011 MDL 0.0032 — 0.02012 MDL 0.023 — 0.0UCL 80 (mean+UCL 80) 0.28 — 0.0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 7.1 — 0.0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 13 — 0.0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 13 — 0.0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 24 — 0.0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 14 — 0.0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 16 — 0.0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 15 — 0.0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 12 — 0.0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 14 — 0.0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 12 — 0.0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 17 — 0.0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 17 — 0.0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 12 — 0.0S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 13 — 0.0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 7.5 — 0.0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 7.7 — 0.0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 5.4 — 0.0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 6.2 — 0.0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 14 — 0.0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 24 — 0.0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 14 — 0.0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 8.3 — 0.0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 10 — 0.0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 13 — 0.0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 15 — 0.0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 17 — 0.0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 7.8 — 0.0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 12 — 0.0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 11 — 0.0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 12 — 0.0

Table 10D. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, mmm/dd/yyyy, month/day/year; na, not available; NF, North Fork; NR, near; PH, Powerhouse; Pr, praseodymium; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, RRb, rubidium; RD, Road; Re, rhenium; S, South (station name); S, sulfur; Sb, antimony; Se, selenium; SF, South Fork; SiO2, silica; Sm, samarium; Sn, tin; Sr, strontium; Tb, terlimit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than]
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

Sr

(01080)

(μg/L) Q/R 

2011 MDL 0.011 — 2012 MDL 0.017 — UCL 80 (mean+UCL 80) 0.24 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 20 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 54 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 54 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 75 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 76 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 70 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 95 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 130 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 55 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 36 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 59 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 58 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 39 — S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 54 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 33 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 27 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 18 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 16 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 57 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 80 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 90 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 36 — SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 36 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 85 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 100 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 58 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 32 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 42 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 64 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 56 — 

Table 10D. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; mg/L, mmm/dd/yyyy, month/day/year; na, not available; NF, North Fork; NR, near; PH, Powerhouse; Pr, praseodymium; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, RRb, rubidium; RD, Road; Re, rhenium; S, South (station name); S, sulfur; Sb, antimony; Se, selenium; SF, South Fork; SiO2, silica; Sm, samarium; Sn, tin; Sr, strontium; Tb, terlimit, 80th percentile, of blanks. (See text for explanation of “V” code.); VLY, Valley; WA, Washington; μg/L, microgram per liter; —, no data; <, less than]
Table 10E. Surface-water concentrations of selected cations and trace elements. [The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mileyear; na, not available; NF, North Fork; NR, near; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SFTh, thorium; Ti, titanium; Tl, thallium; Tm, thulium; U, uranium; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); V, vanadiumWA, Washington; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/L, microgram per liter] Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

Te (50585) 

(μg/L) Q/R (

2011 MDL 0.0015 — 02012 MDL 0.0014 — 0UCL 80 (mean+UCL 80) 0.0020 — 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.0015 < 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.0024 — 0S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0015 < 0BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.0015 < 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.0015 < 0SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.0015 < 0MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.0015 < 0MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.0015 < 0MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0015 < 0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.0015 < 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0014 < 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0014 < 0WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.0014 < 0S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.0014 < 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.0014 < 0SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0014 < 0S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.0014 < 0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.0014 < 0MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0014 < 0BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.0014 < 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.0037 — 0SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.0014 < 0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.0014 < 0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0014 < 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.0014 < 0MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.0014 < 0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.0014 < 0SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.0014 < 0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.0030 — 0RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0015 V 0
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

Tl

(01057)

(μg/L) Q/R (

2011 MDL 0.00039 — 0.2012 MDL 0.00046 — 0.UCL 80 (mean+UCL 80) 0.00051 — 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.0016 — 0.S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.0022 — 0.S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0023 — 0.BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.0012 — 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.0026 — 0.SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.0020 — 0.MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.0016 — 0.MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.0017 — 0.MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0030 — 0.MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.0027 — 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0024 — 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0021 — 0.WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.0011 — 0.S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.00078 — 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.0013 — 0.SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0012 — 0.S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.0022 — 0.FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.0024 — 0.MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0022 — 0.BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.0011 — 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.0014 — 0.SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.0024 — 0.SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.0014 — 0.MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0065 — 0.MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.0016 — 0.MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.0021 — 0.SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.0015 — 0.SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.0012 — 0.NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.00065 — 0.RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0020 — 0.

Table 10E. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mileyear; na, not available; NF, North Fork; NR, near; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SFTh, thorium; Ti, titanium; Tl, thallium; Tm, thulium; U, uranium; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); V, vanadiumWA, Washington; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/L, microgram per liter]
Station name Station ID Project ID Date (mm/dd/yyyy) Time PST (hh:mm) Replicate P

(pa

V (01085) 

(μg/L) Q/R (μ

2011 MDL 0.0029 — 0.2012 MDL 0.023 — 0.UCL 80 (mean+UCL 80) na — 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.11 — 0.S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.25 — 0.S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.25 — 0.BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 2.0 — 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.69 — 0.SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.59 — 0.MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 1.2 — 0.MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 1.4 — 0.MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.35 — 0.MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.29 — 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.59 — 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.59 — 0.WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.45 — 0.S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.55 — 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.11 — 0.SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.11 — 0.S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.23 — 0.FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.16 — 0.MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.49 — 0.BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 2.3 — 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.68 — 0.SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.15 — 0.SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.10 — 0.MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.63 — 0.MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.89 — 0.MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.59 — 0.SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.24 — 0.SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.34 — 0.NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.21 — 0.RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.54 — 0.

Table 10E. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mileyear; na, not available; NF, North Fork; NR, near; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SFTh, thorium; Ti, titanium; Tl, thallium; Tm, thulium; U, uranium; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); V, vanadiumWA, Washington; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/L, microgram per liter]
Station

name

Station 

ID

Project

ID

Date

(mm/dd/yyyy)

Time

PST

(hh:mm)

Replicate

P

(pa

Yb

(01194)

(μg/L) Q/R (

2011 MDL 0.00006 — 2012 MDL 0.00022 — UCL 80 (mean+UCL 80) 0.00017 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-001 09/07/2011 15:20 — 0.0024 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-002 09/07/2011 11:10 R1 0.0018 — S YUBA R BLW POORMAN CRK NR WA 392119120484901 SNI-003 09/07/2011 11:15 R2 0.0017 — BELDEN PH A BELDEN CA 11403050 SNI-005 09/19/2011 15:40 — 0.0006 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-006 09/20/2011 10:50 — 0.0012 — SPANISH CREEK NR EAST QUINCEY CA 395830120542501 SNI-007 09/20/2011 16:00 — 0.0013 — MF FEATHER R A SLOAT CA 11393000 SNI-009 09/21/2011 12:30 — 0.0014 — MF FEATHER R NR DELLEKER CA 394647120314501 SNI-011 09/22/2011 13:00 — 0.0020 — MERCED R AB BM1186 NR BRICEBURG CA 373637119573801 SNI-012 11/03/2011 11:00 — 0.0019 — MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 374017119472301 SNI-013 11/02/2011 13:00 — 0.0008 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-040 08/30/2012 14:30 R1 0.0011 — MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 383403120272101 SNI-041 08/30/2012 14:35 R2 0.0010 — WOLF C NR LA BARR MEADOWS CA 390955121034101 SNI-042 09/06/2012 14:30 — 0.0058 — 2S WOLF C NR CHICAGO PARK CA 390722121013901 SNI-043 09/06/2012 16:00 — 0.0019 — S YUBA R AB LANGS CROSSING NR EMIGRANT GAP 391911120392201 SNI-044 09/20/2012 11:30 — 0.0017 — SF DEER C NR WASHINGTON CA 391754120504801 SNI-045 09/25/2012 13:10 — 0.0014 — S YUBA R NR CISCO CA 11414000 SNI-046 09/25/2012 15:00 — 0.0025 — FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 392122120364501 SNI-047 10/01/2012 13:40 — 0.0017 — MF CONSUMES R NR OMO RANCH CA 383632120365101 SNI-048 10/03/2012 12:00 — 0.0004 — BELDEN PH A BELDEN CA 11403050 SNI-049 10/16/2012 14:50 — 0.0013 — SPANISH CREEK BLW CLEAR C NR KEDDIE CA 400129120580701 SNI-050 10/16/2012 10:20 — 0.0010 — SF FEATHER R NR LA PORTE CA 394034121051801 SNI-051 10/17/2012 12:00 — 0.0002 < SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 393302121124501 SNI-052 10/31/2012 11:10 — 0.0006 — MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 394237121161801 SNI-053 10/31/2012 14:30 — 0.0008 — 1MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNI-054 11/07/2012 14:30 R1 0.0018 — MF FEATHER R ABV BRAY C NR SLOAT CA 395141120504901 SNQ-054 11/07/2012 14:35 R2 0.0010 — SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 384634120445301 SNI-055 11/14/2012 11:30 — 0.0025 — SILVER FORK OF AMERICAN R NR KYBURZ CA 384526120162901 SNI-056 11/14/2012 15:00 — 0.0022 — NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 390120120431601 SNI-057 11/15/2012 11:20 — 0.0010 — RUBICON R NR VOLCANOVILLE CA 385957120432401 SNI-058 11/15/2012 13:20 — 0.0011 — 

Table 10E. Surface-water concentrations of selected cations and trace elements.—Continued[The 2011 samples are the average of two runs’ raw results. Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: A, at; ABLW, below; C and CRK, Creek; CA, California; hh:mm, hour:minute; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mileyear; na, not available; NF, North Fork; NR, near; PH, Powerhouse; PST, Pacific Standard Time; Q/R, qualifier or remark code; R, River (station name); RD, Road; S, South; SFTh, thorium; Ti, titanium; Tl, thallium; Tm, thulium; U, uranium; UCL 80, upper confidence limit, 80th percentile, of blanks. (See text for explanation of “V” code.); V, vanadiumWA, Washington; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/L, microgram per liter]
Table 11. Sediment data for concentrations of mercury, methylmercury, reactive mercury, iron species, and total reduced sulfur in sediment less tha[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Abbreviations: A, at; AB and ABV, above; BL and BLCA, California; E, estimated; Fe(II), ferrous iron; Fe(III)a, poorly crystalline ferric iron; Fe(III)c, crystalline ferric iron; g/cm3, gram per cubic centimeter; Hg(II)R, reactive inorgaID, identification; LK, Lake; LOI, loss on ignition; MDL, method detection limit; MeHg, methlymercury; MF, Middle Fork; mg/g, milligram per gram; MI, mile; mL PW/cm3, mcentimeter; mm/dd/yyyy, month/day/year; nd, not determined; NF, North Fork; ng/g, nanogram per gram; NR, near; PH, Powerhouse; R, River; RD, Road; S, South; SF, South FTRS, total reduced sulfur; VLY, Valley; WA, Washington; wt, weight; μM, micromoles; —, no data] Station name Project ID Site ID Date (mm/dd/yyyy) Parameters (parameter cod

Bulk density (51339) (g/cm3) wet wt Percent LOI (51335) MeHg (51351) (ng/g) dry wt Po

(5

(mL 

w

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1.79 0.7 0.07 

S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1.94 0.6 0.31 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1.80 1.8 0.18 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1.80 1.9 0.31 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1.80 1.9 0.16 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1.77 1.6 0.27 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1.85 0.9 0.07 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1.70 1.9 0.66 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1.80 0.7 0.11 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 1.90 0.7 0.10 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 1.79 3.3 0.40 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 1.77 2.9 1.00 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 1.75 0.7 E0.022 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 1.63 5.1 0.14 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 1.72 1.2 E0.044 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 1.88 0.8 0.07 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1.83 0.9 0.04 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1.85 1.5 0.03 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1.81 0.8 0.12 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1.50 7.1 0.12 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1.85 1.8 0.06 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1.87 0.7 0.08 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 1.68 1.2 0.30 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1.81 1.2 0.15 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1.79 0.6 <0.05 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1.83 1.0 0.10 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1.88 0.7 <0.05 
Station 

name

Project 

ID Site ID Date (mm/dd/yyyy)

Parameters

(parameter cod

Fe(III)a

(52677)

(mg/g) 

dry wt

Fe(III)c

(52678)

(mg/g) 

dry wt

TRS 

(52771)

(μmol/g) 

dry wt

THg 

(51347)

(ng/g) 

dry wt

(

d

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 0.24 4.46 0.27 E6.4 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 0.15 8.54 0.61 178 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 0.46 6.57 3.52 10.5 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 0.42 11.7 0.58 21.6 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 0.40 11.1 E0.19 22.4 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 0.23 4.90 1.01 26.6 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 0.18 3.63 0.39 160 <MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 0.30 2.86 2.46 9.0 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 0.09 0.89 0.60 E1.4 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 0.13 3.29 0.58 E2.4 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 0.31 43.2 0.65 52.9 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 0.43 21.4 4.68 381 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 0.20 9.12 0.79 E8.0 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 0.62 16.0 0.55 19.4 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 0.26 4.55 0.59 E3.5 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 0.24 4.88 0.21 9.1 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 0.21 3.48 E0.18 E3.7 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 0.34 7.42 2.56 E7.4 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 0.30 11.2 0.32 13.7 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 0.62 25.4 0.29 31.2 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 0.48 10.3 0.27 E4.6 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 0.23 6.59 0.82 9.1 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 0.28 6.79 0.99 26.4 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 0.28 4.85 1.18 E4.5 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 0.24 5.22 E0.06 E1.1 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 0.11 9.07 1.00 21.5 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 0.14 3.63 5.00 E1.3 

Table 11. Sediment data for concentrations of mercury, methylmercury, reactive mercury, iron species, and total reduced sulfur in sediment less thadiameter.—Continued[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Abbreviations: A, at; AB and ABV, above; BL and BLCA, California; E, estimated; Fe(II), ferrous iron; Fe(III)a, poorly crystalline ferric iron; Fe(III)c, crystalline ferric iron; g/cm3, gram per cubic centimeter; Hg(II)R, reactive inorgaID, identification; LK, Lake; LOI, loss on ignition; MDL, method detection limit; MeHg, methlymercury; MF, Middle Fork; mg/g, milligram per gram; MI, mile; mL PW/cm3, mcentimeter; mm/dd/yyyy, month/day/year; nd, not determined; NF, North Fork; ng/g, nanogram per gram; NR, near; PH, Powerhouse; R, River; RD, Road; S, South; SF, South FTRS, total reduced sulfur; VLY, Valley; WA, Washington; wt, weight; μM, micromoles; —, no data]
Table 12. Sediment data for concentrations of total mercury, iron species, and total reduced sulfur in sediment less than 0.063 millimeters in diamete[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Abbreviations: A, at; AB and ABV, above; BL and BLCA, California; Fe(II), ferrous iron; Fe(III)a, poorly crystalline ferric iron; Fe(III)c, crystalline ferric iron; g/cm3, gram per cubic centimeter; HWY, Highway; ID, identification; Lignition; MF, Middle Fork; mg/g, milligram per gram; MI, mile; mL PW/cm3, milliliter porewater per cubic centimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanPH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; THg, total mercury; TRS, total reduced sulfur; VLY, Valley; WA, Washington; wt, weight; μmol/g, micromole p

Station name Project ID Site ID Date (mm/dd/yyyy) Parameters (parameter cod

Bulk density (51340) (g/cm3) wet wt Percent LOI (51336) Po

(51

(mL P

we

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1.28 17.6 0S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1.37 7.7 0BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1.30 13.7 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1.43 7.5 0SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1.52 6.7 0MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1.50 7.2 0MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1.34 11.0 0MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1.30 12.6 0MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1.29 13.7 0MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 8/30/2012 1.15 23.6 0WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 1.42 11.3 0S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 1.37 13.7 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 1.17 19.8 0SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 1.47 9.5 0S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 1.26 15.0 0FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 1.19 19.7 0MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1.22 16.2 0BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1.27 15.6 0SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1.43 8.9 0SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1.25 26.3 0SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1.41 8.5 0MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1.41 4.5 0MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 1.39 9.6 0SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1.38 11.2 0SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1.10 17.8 0NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1.44 5.5 0RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1.26 10.0 0
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Parameters

(parameter co

THg 

(51348)

(ng/g) 

dry wt

Fe(II) 

(52679)

(mg/g) 

dry wt

Fe(III)a

(52680)

(mg/g) 

dry wt

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 197 0.58 1.77 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1,260 0.70 1.64 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 41.4 0.42 0.99 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 70.2 0.25 0.83 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 61.9 0.25 1.24 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 105 0.42 0.77 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 43.4 0.43 0.93 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 64.7 1.38 0.48 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 47.4 1.68 0.76 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 98.8 1.62 5.15 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 1,410 0.73 7.54 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 215 0.60 6.63 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 178 0.91 18.2 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 49.9 0.25 2.86 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 70.3 0.57 8.65 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 306 0.67 9.72 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 94.7 3.03 3.77 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 45.3 0.59 5.97 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 71.4 2.52 3.00 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 165 0.52 4.70 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 55.1 0.31 11.4 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 51.0 2.05 3.17 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 217 3.17 2.25 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 66.4 0.51 3.13 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 58.8 0.61 7.14 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 210 0.51 1.55 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 E28.1 4.65 1.25 

Table 12. Sediment data for concentrations of total mercury, iron species, and total reduced sulfur in sediment less than 0.063 millimeters in diamete[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Abbreviations: A, at; AB and ABV, above; BL and BLCA, California; Fe(II), ferrous iron; Fe(III)a, poorly crystalline ferric iron; Fe(III)c, crystalline ferric iron; g/cm3, gram per cubic centimeter; HWY, Highway; ID, identification; Lignition; MF, Middle Fork; mg/g, milligram per gram; MI, mile; mL PW/cm3, milliliter porewater per cubic centimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanPH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; THg, total mercury; TRS, total reduced sulfur; VLY, Valley; WA, Washington; wt, weight; μmol/g, micromole p
Table 13. Sediment data for grain-size distribution. [Percent clay, percent silt, percent sand, D50, and mean grain size determined by Coulter analysis in U.S. Geological Survey California Water Science Center; Coulter analyses dAbbreviations: A, at; AB, above; ABV, above; BLW, below; C, Creek; CA, California; CRK; Creek; D50, median diameter of the particle-size distribution; HWY, Highway; IDMF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; NR, near; PH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; VLY, Vathan] Station name Project ID Site ID Date (mm/dd/yyyy) Percent clay1 Percent silt2 Percent sand3 D50, grain si

(mm) 

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1.06 5.52 93.42 0.55 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1.36 6.65 91.99 0.53 S YUBA R BLW POORMAN CRK NR WA SNS-003 392119120484901 09/07/2011 1.87 7.93 90.20 0.64 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 5.28 18.44 76.27 0.47 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1.56 11.70 86.74 0.39 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 2.34 12.82 84.84 0.28 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 3.81 15.63 80.56 0.38 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 2.17 12.25 85.58 0.48 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1.39 12.68 85.94 0.25 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 0.49 2.64 96.87 0.39 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 1.15 7.14 91.71 0.62 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 1.63 9.08 89.30 0.43 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3.26 12.24 84.50 0.37 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2.29 12.50 85.21 0.86 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 1.63 8.63 89.74 0.44 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 1.01 6.33 92.66 0.47 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 1.41 6.07 92.52 0.60 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 0.86 4.28 94.86 0.61 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1.96 9.15 88.89 0.72 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1.92 10.65 87.43 0.68 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 2.80 32.85 64.35 0.10 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 5.24 30.67 64.09 0.20 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 0.75 4.34 94.91 0.40 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 0.94 7.06 92.00 0.30 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1.85 16.05 82.10 0.31 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1.31 5.28 93.40 0.66 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1.51 9.75 88.74 0.56 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1.06 6.79 92.15 0.65 

1Calculation of percent clay; clay is defined by material less than 0.004 mm (Wentworth, 1922). 2Calculation of percent silt; silt is defined by material less than 0.063 mm and greater than or equal to 0.004 mm (Wentworth, 1922).3Calculation of percent sand; sand is defined by material less than 2 mm and greater than or equal to 0.063 mm (Wentworth, 1922).
Table 14A. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.[All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; Al, aluminumBa, barium; Be, beryllium; Bi, bismuth; BL and BLW, below; C and CRK, Creek; Ca, calcium; CA, California; Cd, cadmium; Ce, cerium; Co, cobalt; Dig, digestions, reported vfrom mulitple digestions; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; n, number; NFPH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; VLY, Valley; WA, Washington; μg/g, microgram per gram]

Station

name

Project

ID

Station

ID

Date

(mm/dd/yyyy)

Dig

(n)

Param

(paramete

Al

(03926)

(percentage)

As

(03933)

(μg/g)

(52

(μ

2011 MDL 0.0020 0.072 2012 MDL 0.0030 0.10 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 7.1 35 3S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 8.0 63 3BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 7.9 15 4SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 7.5 14 4SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 8.4 16 3MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 8.6 17 1MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 7.7 7.2 1MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 7.9 15 3MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 4.4 16 1MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 7.5 2.5 1WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 11 57 1S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 8.8 13 4S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 5.6 37 2SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 8.3 11 3S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 7.5 24 1FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 7.3 25 9MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 8.2 3.7 1BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 6.9 13 4SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 7.3 19 5SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 7.9 58 1SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 7.9 18 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 7.5 11 2MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 7.8 12 1SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 9.7 55 1SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 7.1 16 1NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 7.7 18 5RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 8.1 5.6 3
Station name Project ID Station ID Date (mm/dd/yyyy) Dig (n) Param

(paramet

Bi (52790) (μg/g) Ca (03954) (percentage) 

(0

(μ

2011 MDL 0.080 0.018 0.2012 MDL 0.054 0.079 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 0.54 2.4 1.S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 0.47 0.93 1.BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 0.22 2.3 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 0.25 1.4 0.SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 0.25 1.4 0.MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 0.40 2.4 0.MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 0.17 2.0 0.MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 0.35 1.7 0.MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 0.45 1.5 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 0.79 2.5 0.WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 0.48 1.2 1.S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 0.23 0.76 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 0.42 1.8 0.SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 0.24 0.92 0.S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 0.36 2.5 0.FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 0.45 2.5 0.MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 0.78 2.8 0.BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 0.24 2.1 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 0.42 1.5 0.SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 0.29 2.2 1.SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 0.19 4.0 0.MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 0.27 2.2 0.MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 0.38 2.6 0.SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 0.54 2.0 0.SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 0.49 2.5 0.NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 0.36 0.38 0.RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 0.35 2.3 0.

Table 14A. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.—Continued [All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; Al, aluminumBa, barium; Be, beryllium; Bi, bismuth; BL and BLW, below; C and CRK, Creek; Ca, calcium; CA, California; Cd, cadmium; Ce, cerium; Co, cobalt; Dig, digestions, reported vfrom mulitple digestions; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; n, number; NFPH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; VLY, Valley; WA, Washington; μg/g, microgram per gram]
Table 14B. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.[All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Cr, chromium; Cs, cesium; Cu, copper; Dig, digestions, reported values are average concentration from mulitple digestions; Dy, dysprosium; Er, erbium; Eu, eurGd, gadolinium; Ho, holmium; HWY, Highway; ID, identification; K, potassium; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/dayFork; NR, near; PH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; VLY, Valley; WA, Washington; <, less than; μg/g, microgram per gram]

Station

name

Project

ID

Station

ID

Date

(mm/dd/yyyy)

Parameters

(parameter co

Dig

(n)

Cr

(03949)

(μg/g)

Cs

(52792)

(μg/g)

C

(03

(μ

2011 MDL 0.53 0.025 2012 MDL 0.37 0.038 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 130 3.5 13S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 390 3.3 9BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 430 5.2 12SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 430 3.2 6SPANISH CREEK NR EAST QUINCY CA SNS-007 395830120542501 09/20/2011 1 420 3.2 6MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 110 2.3 7MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 47 3.5 5MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 67 6.6 5MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 22 8.0 2MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 74 1.8 4WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 350 1.8 13S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 150 4.1 9S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 72 3.1 12SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 88 3.4 5S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 65 2.5 6FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 68 2.8 9MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 100 2.3 12BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 380 4.5 10SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 330 5.5 6SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 420 2.8 27SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 320 1.4 11MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 250 2.8 7MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 110 2.2 7SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 110 3.0 15SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 59 3.3 4NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 100 2.8 4RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 100 2.7 6
Station name Project ID Station ID Date (mm/dd/yyyy) Dig (n) Param

(paramete

Eu (52795) (μg/g) Fe (03930) (percentage) 

(52

(μ

2011 MDL 0.0011 0.0030 02012 MDL 0.0009 0.0070 0S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 1.2 5.4 18 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 1.3 4.9 20 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 1.3 5.2 18 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 1.2 5.1 19 SPANISH CREEK NR EAST QUINCY CA SNS-007 395830120542501 09/20/2011 1 1.2 6.1 21 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 1.0 4.8 20 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 0.8 4.6 19 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 1.3 4.6 20 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 1.0 4.6 13 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 1.8 5.8 20 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 1.1 9.1 22 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 1.2 7.2 20 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 1.4 6.9 12 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 1.4 6.0 23 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 1.1 5.7 18 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 1.0 5.6 16 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 1.7 5.5 19 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 1.2 5.9 17 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 1.2 5.5 19 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 1.3 7.5 19 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 1.4 9.5 17 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 1.1 6.1 16 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 1.1 5.7 17 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 1.2 5.9 22 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 1.1 4.7 18 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 1.1 4.5 22 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 1.4 5.1 20 

Table 14B. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.—Continued [All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Cr, chromium; Cs, cesium; Cu, copper; Dig, digestions, reported values are average concentration from mulitple digestions; Dy, dysprosium; Er, erbium; Eu, eurGd, gadolinium; Ho, holmium; HWY, Highway; ID, identification; K, potassium; LK, Lake; MDL, method detection limit; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/dayFork; NR, near; PH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; VLY, Valley; WA, Washington; <, less than; μg/g, microgram per gram]
Table 14C. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.[All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Dig, digestions, reported values are average concentration from multiple digestions; HWY, Highway; ID, identification; La, lanthanum; Li, lithium; LK, Lake; Ldetection limit; MF, Middle Fork; Mg, magnesium; MI, mile; mm/dd/yyyy, month/day/year; Mn, manganese; Mo, molybdenum; n, number; Na, sodium; Nd, neodymium; nd, noNi, nickel; NR, near; P, phosphorus; Pb, lead; PH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; VLY, Valley; WA, Washington; μg/g, microgram per gram]

Station

name

Project

ID

Station

ID

Date

(mm/dd/yyyy)

Parameter

(parameter co

Dig

(n)

La

(52799)

(μg/g)

Li

(03939)

(μg/g)

Lu

(52800

(μg/g

2011 MDL 0.0076 0.31 0.00042012 MDL 0.0033 0.15 0.0004S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 28 28 0.33 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 35 26 0.43 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 18 38 0.43 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 24 30 0.33 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 24 32 0.33 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 19 18 0.30 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 16 23 0.24 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 44 44 0.37 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 48 45 0.31 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 37 13 0.30 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 15 13 0.30 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 19 32 0.38 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 32 13 0.30 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 32 27 0.39 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 26 13 0.30 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 24 13 0.30 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 42 25 0.37 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 20 34 0.40 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 27 34 0.34 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 18 21 0.34 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 14 21 0.48 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 20 23 0.29 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 20 16 0.34 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 29 30 0.28 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 30 35 0.29 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 37 28 0.30 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 40 30 0.35 
Station name Project ID Station ID Date (mm/dd/yyyy) Dig (n) Parame

(parameter 

Mo (03947) (μg/g) Na (03943) (percentage) Nd (52801) (μg/g) 

2011 MDL 0.33 0.031 0.011 2012 MDL 0.26 0.069 0.003S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 18 0.82 27 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 5.1 0.59 33 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 2.0 0.92 21 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 1.0 0.59 23 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 2.2 0.57 23 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 2.0 1.4 19 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 3.1 1.2 17 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 2.3 1.1 37 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 4.6 0.44 35 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 2.1 1.0 35 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 2.0 0.59 17 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 2.0 0.53 20 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 6.5 0.59 31 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 2.7 0.56 30 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 5.0 1.3 25 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 4.1 1.2 22 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 1.7 1.2 38 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 1.6 0.82 22 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 1.5 0.54 26 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 1.5 0.69 21 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 1.5 1.0 18 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 1.0 1.3 20 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 0.9 1.3 20 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 1.8 0.91 27 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 3.2 1.5 28 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 1.9 0.57 32 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 1.2 1.0 36 

Table 14C. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.—Continued [All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Dig, digestions, reported values are average concentration from multiple digestions; HWY, Highway; ID, identification; La, lanthanum; Li, lithium; LK, Lake; Ldetection limit; MF, Middle Fork; Mg, magnesium; MI, mile; mm/dd/yyyy, month/day/year; Mn, manganese; Mo, molybdenum; n, number; Na, sodium; Nd, neodymium; nd, noNi, nickel; NR, near; P, phosphorus; Pb, lead; PH, Powerhouse; R, River; RD, Road; S, South; SF, South Fork; VLY, Valley; WA, Washington; μg/g, microgram per gram]
Table 14D. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.[All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Dig, digestions, reported values are average concentration from multiple digestions; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limitmm/dd/yyyy, month/day/year; n, number; NF, North Fork; NR, near; PH, Powerhouse; Pr, praseodymium; Q, remark code; R, River; Rb, rubidium; RD, Road; Re, rhenium; S, SSb, antimony; Se, selenium; SF, South Fork; Sm, samarium; Sn, tin; Sr, strontium; Tb, terbium; VLY, Valley; WA, Washington; —, not applicable; <, less than; μg/g, microgram 

Station

name

Project

ID

Station

ID

Date

(mm/dd/yyyy)

Dig

(n)

Parame

(paramete

Pr

(52802)

(μg/g)

Rb

(52803)

(μg/g)

R

(528

(μg/g) 

2011 MDL 0.0021 0.04 0.001 2012 MDL 0.0012 0.20 0.001 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 7.0 65 0.004 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 8.6 110 0.001 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 5.0 39 0.002 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 5.9 59 0.001 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 5.7 58 0.001 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 4.8 39 0.001 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 4.3 51 0.001 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 9.9 110 0.001 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 9.7 69 0.001 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 8.8 28 0.010 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 4.0 31 0.010 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 5.0 48 0.001 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 7.8 49 0.001 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 7.7 49 0.001 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 6.3 34 0.001 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 5.5 38 0.001 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 9.8 53 0.001 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 5.1 38 0.001 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 6.7 70 0.001 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 4.9 39 0.001 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 4.1 19 0.001 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 5.0 54 0.001 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 5.0 35 0.001 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 6.6 55 0.001 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 6.8 41 0.001 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 8.6 110 0.001 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 9.4 89 0.001 
Station name Project ID Station ID Date (mm/dd/yyyy) Dig (n) Parame

(paramete

Sb (03929) (μg/g) Se (03928) Sm (52805) (μg/g) 

(μg/g) (Q) 

2011 MDL 0.032 0.52 — 0.0030 2012 MDL 0.22 0.40 — 0.0042 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 1.8 1.3 — 5.2 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 4.8 1.6 — 6.1 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 1.2 1.6 — 4.5 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 1.6 0.63 — 4.6 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 1.6 0.58 — 4.6 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 2.5 0.46 — 3.8 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 0.77 0.46 < 3.5 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 0.95 1.0 — 6.7 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 0.65 0.48 < 6.2 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 0.54 0.43 — 6.8 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 1.6 0.53 — 3.9 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 2.4 0.79 — 4.4 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 1.1 2.0 — 6.1 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 1.2 0.55 — 5.8 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 1.0 1.0 — 4.9 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 1.8 0.49 — 4.2 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 0.51 0.56 — 7.0 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 1.1 1.3 — 4.6 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 2.2 0.70 — 5.3 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 1.8 0.51 — 4.6 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 0.47 0.60 — 4.3 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 1.0 0.40 < 4.3 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 1.1 0.60 — 4.3 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 1.0 0.68 — 4.9 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 1.0 0.35 < 5.2 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 0.65 0.72 — 5.8 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 0.75 0.38 < 6.6 

Table 14D. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.—Continued[All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Dig, digestions, reported values are average concentration from multiple digestions; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limitmm/dd/yyyy, month/day/year; n, number; NF, North Fork; NR, near; PH, Powerhouse; Pr, praseodymium; Q, remark code; R, River; Rb, rubidium; RD, Road; Re, rhenium; S, SSb, antimony; Se, selenium; SF, South Fork; Sm, samarium; Sn, tin; Sr, strontium; Tb, terbium; VLY, Valley; WA, Washington; —, not applicable; <, less than; μg/g, microgram 
Table 14E. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.[All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Dig, digestions, reported values are average concentration from multiple digestions; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limitmm/dd/yyyy, month/day/year; n, number; nd, not determined; NF, North Fork; NR, near; PH, Powerhouse; Q, remark code; R, River; RD, Road; S, South; SF, South Fork; Te, teTi, titanium; Tl, thallium; Tm, thulium; U, uranium; V, vanadium; VLY, Valley; W, tungsten; WA, Washington; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; —, not applicaμg/g, microgram per gram]

Station

name

Project

ID

Station

ID

Date

(mm/dd/yyyy)

Dig

(n)

Parame

(parameter 

Te

(52807)

Th

(52808)

(μg/g)

T

(03

(perce

(μg/g) (Q) 

2011 MDL 0.022 — 0.0067 0.2012 MDL 0.029 — 0.0045 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 0.093 — 10 0.S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 0.11 — 13 0.BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 0.047 — 4.9 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 0.061 — 6.9 0.SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 0.044 — 6.6 0.MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 0.050 — 7.4 0.MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 0.046 — 5.5 0.MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 0.041 — 24 0.MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 0.023 — 31 0.MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 0.035 — 6.7 0.WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 0.25 — 4.9 0.S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 0.040 — 5.3 0.S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 0.062 — 7.6 0.SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 0.029 < 8.3 0.S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 0.040 — 7.3 0.FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 0.040 — 6.5 0.MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 0.025 < 11 0.BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 0.044 — 4.6 0.SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 0.060 — 7.4 0.SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 0.064 — 4.0 0.SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 0.026 < 2.2 0.MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 0.042 — 7.6 0.MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 0.023 < 6.0 0.SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 0.025 < 9.0 0.SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 0.026 < 11 0.NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 0.042 — 14 0.RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 0.032 — 14 0.
Station name Project ID Station ID Date (mm/dd/yyyy) Dig (n) Parame

(parameter 

U (03936) (μg/g) V (03924) (μg/g) W (52810) (μg/g) Y (5281

(μg/g

2011 MDL 0.0032 0.11 0.050 0.002012 MDL 0.0042 0.06 0.094 0.00S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-001 391911120392201 09/07/2011 1 22 170 9.4 21 S YUBA R BLW POORMAN CRK NR WA SNS-002 392119120484901 09/07/2011 1 4.6 130 2.3 27 BELDEN PH A BELDEN CA SNS-005 11403050 09/19/2011 1 2.9 220 0.93 25 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-006 400129120580701 09/20/2011 1 2.5 200 1.4 20 SPANISH CREEK NR EAST QUINCEY CA SNS-007 395830120542501 09/20/2011 1 2.4 220 1.3 19 MF FEATHER R A SLOAT CA SNS-009 11393000 09/21/2011 1 3.7 170 2.8 18 MF FEATHER R NR DELLEKER CA SNS-011 394647120314501 09/22/2011 1 10 160 4.3 15 MERCED R AB BM1186 NR BRICEBURG CA SNS-012 373637119573801 11/03/2011 1 19 120 2.2 25 MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNS-013 374017119472301 11/02/2011 1 58 98 1.1 22 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNS-040 383403120272101 08/30/2012 2 4.2 170 0.83 25 WOLF C NR LA BARR MEADOWS CA SNS-042 390955121034101 09/06/2012 2 1.9 270 18 23 S WOLF C NR CHICAGO PARK CA SNS-043 390722121013901 09/06/2012 3 1.8 240 1.2 23 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP SNS-044 391911120392201 09/20/2012 2 15 150 6.9 27 SF DEER C NR WASHINGTON CA SNS-045 391754120504801 09/25/2012 3 4.4 180 2.1 24 S YUBA R NR CISCO CA SNS-046 11414000 09/25/2012 2 10 170 16 21 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNS-047 392122120364501 10/01/2012 2 5.8 170 2.0 18 MF CONSUMES R NR OMO RANCH CA SNS-048 383632120365101 10/03/2012 1 4.8 160 1.2 25 BELDEN PH A BELDEN CA SNS-049 11403050 10/16/2012 1 3.1 210 0.89 26 SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNS-050 400129120580701 10/16/2012 1 2.3 160 1.5 21 SF FEATHER R NR LA PORTE CA SNS-051 394034121051801 10/17/2012 1 1.5 240 1.1 22 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNS-052 393302121124501 10/31/2012 1 1.2 270 1.4 29 MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNS-053 394237121161801 10/31/2012 1 2.2 180 1.4 18 MF FEATHER R ABV BRAY C NR SLOAT CA SNS-054 395141120504901 11/07/2012 2 3.0 180 2.4 21 SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNS-055 384634120445301 11/14/2012 1 7.9 170 1.2 19 SILVER FORK OF AMERICAN R NR KYBURZ CA SNS-056 384526120162901 11/14/2012 1 17 140 2.3 19 NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNS-057 390120120431601 11/15/2012 1 3.5 120 1.5 17 RUBICON R NR VOLCANOVILLE CA SNS-058 385957120432401 11/15/2012 1 4.5 160 1.8 24 

Table 14E. Data for trace elements and major elements in sediment less than 0.063 millimeter in diameter.—Continued[All analyses completed at the U.S. Geological Survey National Research Program, Central Branch, Boulder, Colorado. Abbreviations: A, at; AB and ABV, above; BL and BLWCA, California; Dig, digestions, reported values are average concentration from multiple digestions; HWY, Highway; ID, identification; LK, Lake; MDL, method detection limitmm/dd/yyyy, month/day/year; n, number; nd, not determined; NF, North Fork; NR, near; PH, Powerhouse; Q, remark code; R, River; RD, Road; S, South; SF, South Fork; Te, teTi, titanium; Tl, thallium; Tm, thulium; U, uranium; V, vanadium; VLY, Valley; W, tungsten; WA, Washington; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; —, not applicaμg/g, microgram per gram]
Table 15. Mean and standard deviation of fish tissue mercury concentrations and total length by species and sampling location.

[All analyses done at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; C, Creek; CA, California; Hg, mercury; HWY, HighwayMI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; N, number of individual fish; na, not applicable; NF, North Fork; NR, near; PH, Powerhouse; R, River; RD, Road; S, SSF, South Fork; VLY, Valley; ww, wet weight; μg/g, microgram per gram]

Station 

name

Date

(mm/dd/yyyy) Species N Mean Hg (μg/g ww) S.D. Hg (μg/g ww) Mean t

(

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA 08/12/2011 Rainbow trout 13 62 18 BELDEN PH A BELDEN CA 08/24/2011 Rainbow trout 13 19 6 2SPANISH CREEK BLW CLEAR C NR KEDDIE CA 08/29/2011 Brown trout 1 45 na SPANISH CREEK BLW CLEAR C NR KEDDIE CA 08/29/2011 Hardhead 1 159 na 3SPANISH CREEK BLW CLEAR C NR KEDDIE CA 08/29/2011 Rainbow trout 14 53 14 2MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA 10/20/2011 Rainbow trout 10 48 15 2MERCED R AB BM1186 NR BRICEBURG CA1 10/21/2011 Rainbow trout 12 49 17 2MF CONSUMES R NR OMO RANCH CA 07/18/2012 Rainbow trout 15 107 42 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA 07/20/2012 Rainbow trout 15 97 24 WOLF C NR LA BARR MEADOWS CA 07/23/2012 Rainbow trout 7 211 46 WOLF C NR LA BARR MEADOWS CA 07/23/2012 Brown trout 8 262 63 2S WOLF C NR CHICAGO PARK CA 07/24/2012 Rainbow trout 14 117 35 S WOLF C NR CHICAGO PARK CA 07/24/2012 Brown trout 1 107 na SF DEER C NR WASHINGTON CA 07/25/2012 Rainbow trout 14 57 24 SF DEER C NR WASHINGTON CA 07/25/2012 Brown trout 1 75 na 3S YUBA R NR CISCO CA 08/07/2012 Brown trout 14 64 15 2S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA 08/09/2012 Rainbow trout 15 57 14 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA 08/09/2012 Brown trout 1 47 na 2FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 08/23/2012 Rainbow trout 9 72 23 FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA 08/23/2012 Brown trout 2 52 16 2BELDEN PH A BELDEN CA 10/03/2012 Rainbow trout 15 18 4 SPANISH CREEK BLW CLEAR C NR KEDDIE CA 10/04/2012 Rainbow trout 15 60 15 2SF FEATHER R NR LA PORTE CA 10/09/2012 Rainbow trout 12 26 13 2SF FEATHER R NR LA PORTE CA 10/09/2012 Brown trout 2 22 12 2SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 10/11/2012 Rainbow trout 14 66 18 SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA 10/11/2012 Brown trout 2 63 15 MF FEATHER R ABV BRAY C NR SLOAT CA 10/16/2012 Rainbow trout 15 99 26 2MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA 10/17/2012 Rainbow trout 15 68 20 2SILVER FORK OF AMERICAN R NR KYBURZ CA2 10/30/2012 Rainbow trout 15 14 7 2SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 11/05/2012 Rainbow trout 14 90 27 2SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA 11/05/2012 Brown trout 1 69 na 2RUBICON R NR VOLCANOVILLE CA 11/07/2012 Rainbow trout 12 42 16 2NF OF MF AMERICAN R NR MICHIGAN BLUFF CA 11/14/2012 Rainbow trout 15 76 17 

1Includes eleven fish collected above Briceburg on 10/21/2011 and one fish collected below Briceburg on 10/20/2011.2Apparently mostly planted fish (from hatchery).
Table 16. Fish length, weight, and mercury concentration in tissue for individual samples. [All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight] Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-1-SYBSP-RBT-180/47-081211 RBT 18S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-2-SYBSP-RBT-222/103-081211 RBT 22S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-3-SYBSP-RBT-198/72-081211 RBT 19S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-4-SYBSP-RBT-174/48-081211 RBT 17S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-5-SYBSP-RBT-230/115-081211 RBT 23S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-6-SYBSP-RBT-215/92-081211 RBT 21S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-7-SYBSP-RBT-190/57-081211 RBT 19S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-8-SYBSP-RBT-217/90-081211 RBT 21S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-9-SYBSP-RBT-179/61-081211 RBT 17S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-10-SYBSP-RBT-158/38-081211 RBT 15S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-11-SYBSP-RBT-188/69-081211 RBT 18S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-12-SYBSP-RBT-158/40-081211 RBT 15S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-13-SYBSP-RBT-202/70-081211 RBT 20BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-14-NFYEL-RBT-140/28-082411 RBT 14BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-15-NFYEL-RBT-218/101-082411 RBT 21BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-16-NFYEL-RBT-255/153-082412 RBT 25BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-17-NFYEL-RBT-249/142-082411 RBT 24BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-18-NFYEL-RBT-278/215-082411 RBT 27
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-19-NFYEL-RBT-159/36-082411 RBT 15BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-20-NFYEL-RBT-201/80-082411 RBT 20BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-21-NFYEL-RBT-200/77-082411 RBT 20BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-22-NFYEL-RBT-223/102-082411 RBT 22BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-23-NFYEL-RBT-227/120-082411 RBT 22BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-24-NFYEL-RBT-162/40-082411 RBT 16BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-25-NFYEL-RBT-165/42-082411 RBT 16BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-26-NFYEL-RBT-170/51-082411 RBT 17SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-27-NFSPA-BRN-199/78-082911 BRN 19

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-28-NFSPA-HHD-369/415-082911 HHD 36

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-29-NFSPA-RBT-208/82-082911 RBT 20

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-30-NFSPA-RBT-213/101-082911 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-31-NFSPA-RBT-215/100-082911 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-32-NFSPA-RBT-216/99-082911 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-33-NFSPA-RBT-236/128-082911 RBT 23

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-34-NFSPA-RBT-234/125-082911 RBT 23

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-35-NFSPA-RBT-256/149-082911 RBT 25

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-36-NFSPA-RBT-237/140-082911 RBT 23

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-006 400129120580701 08/28/2011 SN11-37-NFSPA-RBT-290/255-082911 RBT 29

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-38-NFSPA-RBT-245/151-082911 RBT 24SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-39-NFSPA-RBT-307/262-082911 RBT 30SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-40-NFSPA-RBT-320/315-082911 RBT 32SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-41-NFSPA-RBT-346/422-082911 RBT 34SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-42-NFSPA-RBT-352/458-082911 RBT 35MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-53-MERBR-RBT-371/395-102011 RBT 37MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-54-MERBR-RBT-237/120-102111 RBT 23MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-55-MERBR-RBT-215/95-102111 RBT 21MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-56-MERBR-RBT-230/130-102111 RBT 23MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-57-MERBR-RBT-223/125-102111 RBT 22MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-58-MERBR-RBT-235/145-102111 RBT 23MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-59-MERBR-RBT-247/135-102111 RBT 24MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-60-MERBR-RBT-261/163-102111 RBT 26MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-61-MERBR-RBT-286/237-102111 RBT 38MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-62-MERBR-RBT-342/388-102111 RBT 34MERCED R AB BM1186 NR 

BRICEBURG CA

SNI-012 373637119573801 10/20/2011 SN11-63-MERBR-RBT-404/530-102111 RBT 40

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

MERCED R AB BM1186 NR 

BRICEBURG CA

SNI-012 373637119573801 10/20/2011 SN11-64-MERBR-RBT-406/602-102111 RBT 40

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-43-MEREP-RBT-192/55-102011 RBT 19

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-44-MEREP-RBT-193/68-102011 RBT 19

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-45-MEREP-RBT-194/73-102011 RBT 19

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-46-MEREP-RBT-212/85-102011 RBT 21

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-47-MEREP-RBT-264/180-102011 RBT 26

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-48-MEREP-RBT-268/185-102011 RBT 26

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-49-MEREP-RBT-286/225-102011 RBT 28

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-50-MEREP-RBT-294/245-102011 RBT 29

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-51-MEREP-RBT-360/445-102011 RBT 36

MERCED R AB HWY 140 BRIDGE NR 

EL PORTAL CA

SNI-013 374017119472301 10/19/2011 SN11-52-MEREP-RBT-398/640-102011 RBT 39

MF COSUMNES R NR PIPI VLY NR 

OMO RANCH CA

SNI-040 383403120272101 07/19/2012 SN12-80-MCPIP-RBT-131/19-072012 RBT 13

MF COSUMNES R NR PIPI VLY NR 

OMO RANCH CA

SNI-040 383403120272101 07/19/2012 SN12-81-MCPIP-RBT-136/21-072012 RBT 13

MF COSUMNES R NR PIPI VLY NR 

OMO RANCH CA

SNI-040 383403120272101 07/19/2012 SN12-82-MCPIP-RBT-147/27-072012 RBT 14

MF COSUMNES R NR PIPI VLY NR 

OMO RANCH CA

SNI-040 383403120272101 07/19/2012 SN12-83-MCPIP-RBT-161/38-072012 RBT 16

MF COSUMNES R NR PIPI VLY NR 

OMO RANCH CA

SNI-040 383403120272101 07/19/2012 SN12-84-MCPIP-RBT-162/35-072012 RBT 16

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-85-MCPIP-RBT-170/47-072012 RBT 17MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-86-MCPIP-RBT-176/51-072012 RBT 17MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-87-MCPIP-RBT-178/52-072012 RBT 17MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-88-MCPIP-RBT-181/53-072012 RBT 18MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-89-MCPIP-RBT-184/58-072012 RBT 18MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-90-MCPIP-RBT-187/64-072012 RBT 18MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-91-MCPIP-RBT-192/68-072012 RBT 19MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-92-MCPIP-RBT-194/66-072012 RBT 19MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-93-MCPIP-RBT-200/74-072012 RBT 20MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-94-MCPIP-RBT-211/84-072012 RBT 21WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-95-WOLF-RBT-140/25-072312 RBT 14WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-96-WOLF-RBT-141/27-072312 RBT 14WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-97-WOLF-RBT-149/31-072312 RBT 14WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-98-WOLF-RBT-151/30-072312 RBT 15WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-99-WOLF-RBT-153/36-072312 RBT 15WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-100-WOLF-RBT-155/34-072312 RBT 15WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-101-WOLF-RBT-162/42-072312 RBT 16WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-102-WOLF-BRN-172/41-072312 BRN 17WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-103-WOLF-BRN-177/51-072312 BRN 17WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-104-WOLF-BRN-188/66-072312 BRN 18

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued [All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-105-WOLF-BRN-201/69-072312 BRN 20WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-106-WOLF-BRN-213/85-072312 BRN 21WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-107-WOLF-BRN-217/108-072312 BRN 21WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-108-WOLF-BRN-236/115-072312 BRN 23WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-109-WOLF-BRN-278/214-072312 BRN 27S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-110-SWOLF-RBT-142/27-072412 RBT 14S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-111-SWOLF-RBT-154/38-072412 RBT 15S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-112-SWOLF-RBT-152/47-072412 RBT 15S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-113-SWOLF-RBT-158/43-072412 RBT 15S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-114-SWOLF-RBT-163/51-072412 RBT 16S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-115-SWOLF-RBT-174/54-072412 RBT 17S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-116-SWOLF-RBT-178/59-072412 RBT 17S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-117-SWOLF-RBT-179/61-072412 RBT 17S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-118-SWOLF-RBT-183/56-072412 RBT 18S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-119-SWOLF-RBT-189/67-072412 RBT 18S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-120-SWOLF-RBT-198/78-072412 RBT 19S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-121-SWOLF-RBT-200/79-072412 RBT 20S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-122-SWOLF-RBT-205/93-072412 RBT 20S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-123-SWOLF-RBT-221/107-072412 RBT 22S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-124-SWOLF-BRN-177/50-072412 BRN 17S YUBA R AB LANGS CROSSING NR 

EMIGRANT GAP CA

SNI-044 391911120392201 08/08/2012 SN12-154-SYBSP-RBT-154/35-080912 RBT 15

S YUBA R AB LANGS CROSSING NR 

EMIGRANT GAP CA

SNI-044 391911120392201 08/08/2012 SN12-155-SYBSP-RBT-158/44-080912 RBT 15

S YUBA R AB LANGS CROSSING NR 

EMIGRANT GAP CA

SNI-044 391911120392201 08/08/2012 SN12-156-SYBSP-RBT-173/45-080912 RBT 17

S YUBA R AB LANGS CROSSING NR 

EMIGRANT GAP CA

SNI-044 391911120392201 08/08/2012 SN12-157-SYBSP-RBT-174/50-080912 RBT 17

S YUBA R AB LANGS CROSSING NR 

EMIGRANT GAP CA

SNI-044 391911120392201 08/08/2012 SN12-158-SYBSP-RBT-175/51-080912 RBT 17

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-159-SYBSP-RBT-180/50-080912 RBT 18S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-160-SYBSP-RBT-186/66-080912 RBT 18S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-161-SYBSP-RBT-188/67-080912 RBT 18S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-162-SYBSP-RBT-192/64-080912 RBT 19S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-163-SYBSP-RBT-194/66-080912 RBT 19S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-164-SYBSP-RBT-200/75-080912 RBT 20S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-165-SYBSP-RBT-203/76-080912 RBT 20S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-166-SYBSP-RBT-212/87-080912 RBT 21S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-167-SYBSP-RBT-224/109-080912 RBT 22S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-168-SYBSP-RBT-243/145-080912 RBT 24S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-169-SYBSP-BRN-216/105-080912 BRN 21SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-126-SDEER-RBT-138/24-072512 RBT 13SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-127-SDEER-RBT-142/27-072512 RBT 14SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-128-SDEER-RBT-143/27-072512 RBT 14SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-129-SDEER-RBT-144/26-072512 RBT 14SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-130-SDEER-RBT-152/36-072512 RBT 15SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-131-SDEER-RBT-155/39-072512 RBT 15SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-132-SDEER-RBT-157/36-072512 RBT 15SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-133-SDEER-RBT-166/51-072512 RBT 16

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued [All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-134-SDEER-RBT-177/53-072512 RBT 17SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-135-SDEER-RBT-183/62-072512 RBT 18SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-136-SDEER-RBT-222/121-072512 RBT 22SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-137-SDEER-RBT-226/115-072512 RBT 22SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-138-SDEER-RBT-237/164-072512 RBT 23SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-139-SDEER-BRN-302/297-072512 BRN 30S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-140-SYASP-BRN-140/24-080712 BRN 14S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-141-SYASP-BRN-152/29-080712 BRN 15S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-142-SYASP-BRN-167/39-080712 BRN 16S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-143-SYASP-BRN-168/44-080712 BRN 16S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-144-SYASP-BRN-225/116-080712 BRN 22S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-145-SYASP-BRN-227/117-080712 BRN 22S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-146-SYASP-BRN-231/125-080712 BRN 23S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-147-SYASP-BRN-239/144-080712 BRN 23S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-148-SYASP-BRN-242/152-080712 BRN 24S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-149-SYASP-BRN-244/146-080712 BRN 24S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-150-SYASP-BRN-247/155-080712 BRN 24S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-151-SYASP-BRN-272/228-080712 BRN 27S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-152-SYASP-BRN-294/271-080712 BRN 29S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-153-SYASP-BRN-315/324-080712 BRN 31FORDYCE C AB LK SPAULDING NR 

EMIGRANT GAP CA

SNI-047 392122120364501 08/22/2012 SN12-170-FORDY-RBT-138/24-082312 RBT 13

FORDYCE C AB LK SPAULDING NR 

EMIGRANT GAP CA

SNI-047 392122120364501 08/22/2012 SN12-171-FORDY-RBT-150/28-082312 RBT 15

FORDYCE C AB LK SPAULDING NR 

EMIGRANT GAP CA

SNI-047 392122120364501 08/22/2012 SN12-172-FORDY-RBT-151/26-082312 RBT 15

FORDYCE C AB LK SPAULDING NR 

EMIGRANT GAP CA

SNI-047 392122120364501 08/22/2012 SN12-174-FORDY-RBT-182/56-082312 RBT 18

FORDYCE C AB LK SPAULDING NR 

EMIGRANT GAP CA

SNI-047 392122120364501 08/22/2012 SN12-175-FORDY-RBT-192/66-082312 RBT 19

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-176-FORDY-RBT-197/70-082312 RBT 19FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-177-FORDY-RBT-217/98-082312 RBT 21FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-178-FORDY-RBT-220/97-082312 RBT 22FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-179-FORDY-BRN-172/44-082312 BRN 17FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-179-FORDY-BRN-250/131-082312 BRN 25MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-65-MCROC-RBT-143/32-071812 RBT 14MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-66-MCROC-RBT-146/33-071812 RBT 14MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-67-MCROC-RBT-159/44-071812 RBT 15MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-68-MCROC-RBT-162/43-071812 RBT 16MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-69-MCROC-RBT-163/41-071812 RBT 16MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-70-MCROC-RBT-175/63-071812 RBT 17MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-71-MCROC-RBT-182/61-071812 RBT 18MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-72-MCROC-RBT-185/59-071812 RBT 18MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-73-MCROC-RBT-203/86-071812 RBT 20MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-74-MCROC-RBT-207/87-071812 RBT 20MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-75-MCROC-RBT-210/92-071812 RBT 21MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-76-MCROC-RBT-213/95-071812 RBT 21MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-77-MCROC-RBT-226/105-071812 RBT 22MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-78-MCROC-RBT-236/137-071812 RBT 23MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-79-MCROC-RBT-241/143-071812 RBT 24BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-181-NFYEL-RBT-128/19-100312 RBT 12BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-182-NFYEL-RBT-146/32-100312 RBT 14BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-183-NFYEL-RBT-147/33-100312 RBT 14BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-184-NFYEL-RBT-148/28-100312 RBT 14BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-186-NFYEL-RBT-152/29-100312 RBT 15

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-187-NFYEL-RBT-159/38-100312 RBT 15BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-188-NFYEL-RBT-172/44-100312 RBT 17BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-189-NFYEL-RBT-173/49-100312 RBT 17BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-190-NFYEL-RBT-174/51-100312 RBT 17BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-191-NFYEL-RBT-181/53-100312 RBT 18BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-192-NFYEL-RBT-206/83-100312 RBT 20BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-193-NFYEL-RBT-217/117-100312 RBT 21BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-194-NFYEL-RBT-223/111-100312 RBT 22BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-195-NFYEL-RBT-253/179-100312 RBT 25SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-196-NFSPA-RBT-181/51-100412 RBT 18

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-197-NFSPA-RBT-203/80-100412 RBT 20

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-198-NFSPA-RBT-212/77-100412 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-199-NFSPA-RBT-213/81-100412 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-200-NFSPA-RBT-214/88-100412 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-201-NFSPA-RBT-215/85-100412 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-202-NFSPA-RBT-216/92-100412 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-203-NFSPA-RBT-217/90-100412 RBT 21

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-204-NFSPA-RBT-221/92-100412 RBT 22

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-205-NFSPA-RBT-223/98-100412 RBT 22

SPANISH CREEK BLW CLEAR C NR 

KEDDIE CA

SNI-050 400129120580701 10/03/2012 SN12-206-NFSPA-RBT-221/103-100412 RBT 22

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-050 400129120580701 10/03/2012 SN12-207-NFSPA-RBT-227/107-100412 RBT 22SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-050 400129120580701 10/03/2012 SN12-208-NFSPA-RBT-258/165-100412 RBT 25SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-050 400129120580701 10/03/2012 SN12-209-NFSPA-RBT-321/306-100412 RBT 32SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-050 400129120580701 10/03/2012 SN12-210-NFSPA-RBT-352/445-100412 RBT 35SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-211-SFABV-RBT-147/29-100912 RBT 14SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-212-SFABV-RBT-172/48-100912 RBT 17SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-213-SFABV-RBT-185/61-100912 RBT 18SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-214-SFABV-RBT-192/67-100912 RBT 19SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-215-SFABV-RBT-197/74-100912 RBT 19SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-216-SFABV-RBT-212/87-100912 RBT 21SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-217-SFABV-RBT-215/94-100912 RBT 21SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-218-SFABV-RBT-217/107-100912 RBT 21SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-219-SFABV-RBT-219/100-100912 RBT 21SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-220-SFABV-RBT-223/106-100912 RBT 22SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-221-SFABV-RBT-246/144-100912 RBT 24SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-222-SFABV-RBT-250/156-100912 RBT 25SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-224-SFABV-BRN-208/84-100912 BRN 20SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-225-SFABV-BRN-285/226-100912 BRN 28SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNI-052 393302121124501 10/10/2012 SN12-225-SFBLW-RBT-148/28-101112 RBT 14SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNI-052 393302121124501 10/10/2012 SN12-226-SFBLW-RBT-151/30-101112 RBT 15SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNI-052 393302121124501 10/10/2012 SN12-227-SFBLW-RBT-153/33-101112 RBT 15SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNI-052 393302121124501 10/10/2012 SN12-228-SFBLW-RBT-157/32-101112 RBT 15

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued [All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-229-SFBLW-RBT-161/36-101112 RBT 16

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-230-SFBLW-RBT-167/39-101112 RBT 16

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-231-SFBLW-RBT-169/52-101112 RBT 16

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-232-SFBLW-RBT-170/47-101112 RBT 17

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-233-SFBLW-RBT-170/48-101112 RBT 17

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-234-SFBLW-RBT-171/50-101112 RBT 17

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-235-SFBLW-RBT-188/69-101112 RBT 18

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-236-SFBLW-RBT-193/65-101112 RBT 19

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-237-SFBLW-RBT-204/85-101112 RBT 20

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-238-SFBLW-RBT-207/87-101112 RBT 20

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-239-SFBLW-BRN-151/34-101112 BRN 15

SF FEATHER R 0.15 MI BL 

FORBESTOWN DAM CA

SNI-052 393302121124501 10/10/2012 SN12-240-SFBLW-BRN-196/73-101112 BRN 19

MF FEATHER R A MILSAP BAR NR 

BRUSH CREEK CA

SNI-053 394237121161801 10/16/2012 SN12-256-MFMIL-RBT-153/31-101712 RBT 15

MF FEATHER R A MILSAP BAR NR 

BRUSH CREEK CA

SNI-053 394237121161801 10/16/2012 SN12-257-MFMIL-RBT-156/35-101712 RBT 15

MF FEATHER R A MILSAP BAR NR 

BRUSH CREEK CA

SNI-053 394237121161801 10/16/2012 SN12-258-MFMIL-RBT-171/46-101712 RBT 17

MF FEATHER R A MILSAP BAR NR 

BRUSH CREEK CA

SNI-053 394237121161801 10/16/2012 SN12-259-MFMIL-RBT-191/63-101712 RBT 19

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-260-MFMIL-RBT-196/66-101712 RBT 19MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-261-MFMIL-RBT-200/78-101712 RBT 20MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-262-MFMIL-RBT-203/65-101712 RBT 20MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-263-MFMIL-RBT-213/83-101712 RBT 21MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-264-MFMIL-RBT-236/116-101712 RBT 23MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-265-MFMIL-RBT-244/127-101712 RBT 24MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-266-MFMIL-RBT-270/190-101712 RBT 27MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-267-MFMIL-RBT-273/207-101712 RBT 27MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-268-MFMIL-RBT-283/208-101712 RBT 28MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-269-MFMIL-RBT-292/216-101712 RBT 29MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-270-MFMIL-RBT-294/218-101712 RBT 29MF FEATHER R ABV BRAY C NR SLOAT CA SNI-054 395141120504901 10/15/2012 SN12-241-MFLPT-RBT-188/49-101612 RBT 18MF FEATHER R ABV BRAY C NR SLOAT CA SNI-054 395141120504901 10/15/2012 SN12-242-MFLPT-RBT-202/67-101612 RBT 20MF FEATHER R ABV BRAY C NR SLOAT CA SNI-054 395141120504901 10/15/2012 SN12-243-MFLPT-RBT-209/87-101612 RBT 20MF FEATHER R ABV BRAY C NR SLOAT CA SNI-054 395141120504901 10/15/2012 SN12-244-MFLPT-RBT-217/77-101612 RBT 21MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-245-MFLPT-RBT-225/92-101612 RBT 22

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-246-MFLPT-RBT-226/94-101612 RBT 22

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-247-MFLPT-RBT-242/115-101612 RBT 24

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-248-MFLPT-RBT-255/132-101612 RBT 25

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-249-MFLPT-RBT-258/141-101612 RBT 25

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-250-MFLPT-RBT-267/167-101612 RBT 26

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-251-MFLPT-RBT-282/193-101612 RBT 28

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-252-MFLPT-RBT-288/206-101612 RBT 28

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-253-MFLPT-RBT-312/286-101612 RBT 31

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-254-MFLPT-RBT-324/303-101612 RBT 32

MF FEATHER R ABV BRAY C NR 

SLOAT CA

SNI-054 395141120504901 10/15/2012 SN12-255-MFLPT-RBT-349/337-101612 RBT 34

SF AMERICAN R A MOSQUITO RD NR 

PLACERVILLE CA

SNI-055 384634120445301 11/04/2012 SN12-287-SAMOS-RBT-176/26-110512 RBT 17

SF AMERICAN R A MOSQUITO RD NR 

PLACERVILLE CA

SNI-055 384634120445301 11/04/2012 SN12-288-SAMOS-RBT-187/29-110512 RBT 18

SF AMERICAN R A MOSQUITO RD NR 

PLACERVILLE CA

SNI-055 384634120445301 11/04/2012 SN12-289-SAMOS-RBT-198/52-110512 RBT 19

SF AMERICAN R A MOSQUITO RD NR 

PLACERVILLE CA

SNI-055 384634120445301 11/04/2012 SN12-290-SAMOS-RBT-202/50-110512 RBT 20

SF AMERICAN R A MOSQUITO RD NR 

PLACERVILLE CA

SNI-055 384634120445301 11/04/2012 SN12-291-SAMOS-RBT-211/60-110512 RBT 21

SF AMERICAN R A MOSQUITO RD NR 

PLACERVILLE CA

SNI-055 384634120445301 11/04/2012 SN12-292-SAMOS-RBT-214/76-110512 RBT 21

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-293-SAMOS-RBT-216/67-110512 RBT 21SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-294-SAMOS-RBT-223/77-110512 RBT 22SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-295-SAMOS-RBT-240/96-110512 RBT 24SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-296-SAMOS-RBT-242/104-110512 RBT 24SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-297-SAMOS-RBT-256/124-110512 RBT 25SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-298-SAMOS-RBT-258/129-110512 RBT 25SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-299-SAMOS-RBT-271/167-110512 RBT 27SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-300-SAMOS-BRN-232/78-110512 BRN 23SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-271-SASIL-RBT-250/126-103012 RBT 25SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-272-SASIL-RBT-254/150-103012 RBT 25SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-273-SASIL-RBT-258/136-103012 RBT 25SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-274-SASIL-RBT-262/149-103012 RBT 26SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-275-SASIL-RBT-270/165-103012 RBT 27SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-276-SASIL-RBT-272/163-103012 RBT 27SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-277-SASIL-RBT-273/160-103012 RBT 27SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-278-SASIL-RBT-275/159-103012 RBT 27

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID Species

Total 

(722

(m

SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-279-SASIL-RBT-278/181-103012 RBT 27

SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-280-SASIL-RBT-285/167-103012 RBT 28

SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-281-SASIL-RBT-292/239-103012 RBT 29

SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-282-SASIL-RBT-295/242-103012 RBT 29

SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-283-SASIL-RBT-302/224-103012 RBT 30

SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-284-SASIL-RBT-312/270-103012 RBT 31

SILVER FORK OF AMERICAN R NR 

KYBURZ CA

SNI-056 384526120162901 10/29/2012 SN12-285-SASIL-RBT-318/273-103012 RBT 31

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-313-MANFK-RBT-144/23-111412 RBT 14

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-314-MANFK-RBT-147/22-111412 RBT 14

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-315-MANFK-RBT-156/23-111412 RBT 15

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-316-MANFK-RBT-160/32-111412 RBT 16

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-317-MANFK-RBT-173/45-111412 RBT 17

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-318-MANFK-RBT-187/61-111412 RBT 18

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-319-MANFK-RBT-188/56-111412 RBT 18

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-320-MANFK-RBT-193/58-111412 RBT 19

NF OF MF AMERICAN R NR 

MICHIGAN BLUFF CA

SNI-057 390120120431601 11/13/2012 SN12-321-MANFK-RBT-196/72-111412 RBT 19

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued[All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID Species 

Total 

(722

(m

NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-322-MANFK-RBT-206/79-111412 RBT 20NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-323-MANFK-RBT-207/78-111412 RBT 20NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-324-MANFK-RBT-209/77-111412 RBT 20NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-325-MANFK-RBT-216/82-111412 RBT 21NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-326-MANFK-RBT-225/92-111412 RBT 22NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-327-MANFK-RBT-239/117-111412 RBT 23RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-301-MARUB-RBT-205/46-110712 RBT 20RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-302-MARUB-RBT-216/61-110712 RBT 21RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-303-MARUB-RBT-220/75-110712 RBT 22RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-304-MARUB-RBT-223/66-110712 RBT 22RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-305-MARUB-RBT-230/67-110712 RBT 23RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-306-MARUB-RBT-238/77-110712 RBT 23RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-307-MARUB-RBT-241/87-110712 RBT 24RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-308-MARUB-RBT-247/100-110712 RBT 24RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-309-MARUB-RBT-286/166-110712 RBT 28RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-310-MARUB-RBT-308/224-110712 RBT 30RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-311-MARUB-RBT-323/272-110712 RBT 32RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-312-MARUB-RBT-373/487-110712 RBT 37

Table 16. Fish length, weight, and mercury concentration in tissue for individual samples.—Continued [All analyses performed at University of California, Davis. Abbreviations: A, at; AB and ABV, above; BL and BLW, below; BRN, brown trout; C, Creek; CA, California; g, graHWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm, millimeter; mm/dd/yyyy, month/day/year; NF, North Fork; ng/g, nanogram per gram; NR, near; RBT, rainbow trout, RD, Road; S, South; SF, South Fork; VLY, Valley; ww, wet weight]
Table 17. Selenium concentrations in fish tissue.[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Abbreviations: A, at; AB, above; ABV, above; BLW, C, Creek; CA, California; dw, dry weight; HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; NF, North Fork; NR, near; PRBT, rainbow trout, RD, Road; S, South; Se, selenium, SF, South Fork; VLY, Valley; μg/g, microgram per gram]

Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID 

S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-2-SYBSP-RBT-222/103-081211 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-3-SYBSP-RBT-198/72-081211 S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-001 391911120392201 08/11/2011 SN11-11-SYBSP-RBT-188/69-081211 BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-16-NFYEL-RBT-255/153-08241BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-21-NFYEL-RBT-200/77-082411 BELDEN PH A BELDEN CA SNI-005 11403050 08/23/2011 SN11-22-NFYEL-RBT-223/102-08241SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-36-NFSPA-RBT-237/140-08291SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-37-NFSPA-RBT-290/255-08291SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-006 400129120580701 08/28/2011 SN11-41-NFSPA-RBT-346/422-08291MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNI-013 374017119472301 10/19/2011 SN11-47-MEREP-RBT-264/180-10201MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNI-013 374017119472301 10/19/2011 SN11-49-MEREP-RBT-286/225-10201MERCED R AB HWY 140 BRIDGE NR EL PORTAL CA SNI-013 374017119472301 10/19/2011 SN11-51-MEREP-RBT-360/445-10201MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-59-MERBR-RBT-247/135-10211MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-62-MERBR-RBT-342/388-10211MERCED R AB BM1186 NR BRICEBURG CA SNI-012 373637119573801 10/20/2011 SN11-63-MERBR-RBT-404/530-10211MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-72-MCROC-RBT-185/59-07181MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-75-MCROC-RBT-210/92-07181MF CONSUMES R NR OMO RANCH CA SNI-048 383632120365101 07/17/2012 SN12-78-MCROC-RBT-236/137-07181MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-87-MCPIP-RBT-178/52-072012 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-90-MCPIP-RBT-187/64-072012 MF COSUMNES R NR PIPI VLY NR OMO RANCH CA SNI-040 383403120272101 07/19/2012 SN12-93-MCPIP-RBT-200/74-072012 WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-99-WOLF-RBT-153/36-072312 WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-100-WOLF-RBT-155/34-072312 WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-101-WOLF-RBT-162/42-072312 WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-105-WOLF-BRN-201/69-07231WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-107-WOLF-BRN-217/108-07231WOLF C NR LA BARR MEADOWS CA SNI-042 390955121034101 07/22/2012 SN12-109-WOLF-BRN-278/214-07231
Station name Project ID Site ID Date (mm/dd/yyyy) Sample ID 

S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-116-SWOLF-RBT-178/59-07241S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-120-SWOLF-RBT-198/78-07241S WOLF C NR CHICAGO PARK CA SNI-043 390722121013901 07/23/2012 SN12-123-SWOLF-RBT-221/107-0724SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-135-SDEER-RBT-183/62-07251SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-136-SDEER-RBT-222/121-07251SF DEER C NR WASHINGTON CA SNI-045 391754120504801 07/24/2012 SN12-138-SDEER-RBT-237/164-07251S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-146-SYASP-BRN-231/125-0807S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-149-SYASP-BRN-244/146-0807S YUBA R NR CISCO CA SNI-046 11414000 08/06/2012 SN12-152-SYASP-BRN-294/271-0807S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-161-SYBSP-RBT-188/67-08091S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-164-SYBSP-RBT-200/75-08091S YUBA R AB LANGS CROSSING NR EMIGRANT GAP CA SNI-044 391911120392201 08/08/2012 SN12-167-SYBSP-RBT-224/109-08091FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-174-FORDY-RBT-182/56-08231FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-176-FORDY-RBT-197/70-08231FORDYCE C AB LK SPAULDING NR EMIGRANT GAP CA SNI-047 392122120364501 08/22/2012 SN12-178-FORDY-RBT-220/97-08231BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-188-NFYEL-RBT-172/44-10031BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-191-NFYEL-RBT-181/53-10031BELDEN PH A BELDEN CA SNI-049 11403050 10/02/2012 SN12-194-NFYEL-RBT-223/111-10031SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-050 400129120580701 10/03/2012 SN12-203-NFSPA-RBT-217/90-10041SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-050 400129120580701 10/03/2012 SN12-206-NFSPA-RBT-221/103-10041SPANISH CREEK BLW CLEAR C NR KEDDIE CA SNI-050 400129120580701 10/03/2012 SN12-209-NFSPA-RBT-321/306-10041SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-216-SFABV-RBT-212/87-10091SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-219-SFABV-RBT-219/100-10091SF FEATHER R NR LA PORTE CA SNI-051 394034121051801 10/08/2012 SN12-222-SFABV-RBT-250/156-10091SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNI-052 393302121124501 10/10/2012 SN12-231-SFBLW-RBT-169/52-10111SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNI-052 393302121124501 10/10/2012 SN12-235-SFBLW-RBT-188/69-10111SF FEATHER R 0.15 MI BL FORBESTOWN DAM CA SNI-052 393302121124501 10/10/2012 SN12-237-SFBLW-RBT-204/85-10111

Table 17. Selenium concentrations in fish tissue.—Continued[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Abbreviations: A, at; AB, above; ABV, above; BLW, C, Creek; CA, California; dw, dry weight; HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; NF, North Fork; NR, near; PRBT, rainbow trout, RD, Road; S, South; Se, selenium, SF, South Fork; VLY, Valley; μg/g, microgram per gram]
Station 

name

Project 

ID

Site 

ID

Date

(mm/dd/yyyy)

Sample 

ID 

MF FEATHER R ABV BRAY C NR SLOAT CA SNI-054 395141120504901 10/15/2012 SN12-241-MFLPT-RBT-188/49-10161MF FEATHER R ABV BRAY C NR SLOAT CA SNI-054 395141120504901 10/15/2012 SN12-248-MFLPT-RBT-255/132-10161MF FEATHER R ABV BRAY C NR SLOAT CA SNI-054 395141120504901 10/15/2012 SN12-254-MFLPT-RBT-324/303-10161MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-259-MFMIL-RBT-191/63-10171MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-264-MFMIL-RBT-236/116-1017MF FEATHER R A MILSAP BAR NR BRUSH CREEK CA SNI-053 394237121161801 10/16/2012 SN12-269-MFMIL-RBT-292/216-1017SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-271-SASIL-RBT-250/126-10301SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-279-SASIL-RBT-278/181-10301SILVER FORK OF AMERICAN R NR KYBURZ CA SNI-056 384526120162901 10/29/2012 SN12-284-SASIL-RBT-312/270-10301SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-288-SAMOS-RBT-187/29-11051SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-293-SAMOS-RBT-216/67-11051SF AMERICAN R A MOSQUITO RD NR PLACERVILLE CA SNI-055 384634120445301 11/04/2012 SN12-298-SAMOS-RBT-258/129-1105NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-318-MANFK-RBT-187/61-11141NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-322-MANFK-RBT-206/79-11141NF OF MF AMERICAN R NR MICHIGAN BLUFF CA SNI-057 390120120431601 11/13/2012 SN12-326-MANFK-RBT-225/92-11141RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-301-MARUB-RBT-205/46-11071RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-306-MARUB-RBT-238/77-11071RUBICON R NR VOLCANOVILLE CA SNI-058 385957120432401 11/06/2012 SN12-311-MARUB-RBT-323/272-1107

Table 17. Selenium concentrations in fish tissue.—Continued[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Abbreviations: A, at; AB, above; ABV, above; BLW, C, Creek; CA, California; dw, dry weight; HWY, Highway; ID, identification; LK, Lake; MF, Middle Fork; MI, mile; mm/dd/yyyy, month/day/year; NF, North Fork; NR, near; PRBT, rainbow trout, RD, Road; S, South; Se, selenium, SF, South Fork; VLY, Valley; μg/g, microgram per gram]
82 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

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Appendix 1. Analytical Methods Used for Water, Sediment, and Fish Tissue 85

Appendix 1. Analytical Methods Used for Water, Sediment, and Fish Tissue

Table 1–1. Analytical methods used for the determination of constituents in water by the U.S. Geological Survey (USGS) National 

Water Quality Laboratory (NWQL), National Research Program (NRP), and additional laboratories.

[Full citation in reference list. Abbreviations: AES, atomic emission spectrometry; CA, California; CAWSC, California Water Science Center; CB, Central 

Branch; CO, Colorado; EPA, U.S. Environmental Protection Agency; FDEP, Florida Department of Environmental Protection; ICP, inductively coupled plasma; 

MS, mass spectrometry; WB, Western Branch]

Analyte(s) Analytical method(s) USGS laboratory Citation(s)

Total mercury (THg) Cold vapor atomic fluorescence 

spectrometry (CVAFS)

NRP-WB, Menlo Park, CA EPA Method 1631, Revision E 

(EPA, 2002b)

Methylmercury (MeHg) Atomic fluorescence after 

ethlyation

NRP-WB, Menlo Park, CA FDEP (2011), 

FDEP (2013)

Reactive mercury (Hg(II)R) Atomic fluorescence after 

reaction with tin dichloride 

(SnCl2)

NRP-WB, Menlo Park, CA Marvin-DiPasquale and Cox 

(2007)

Dissolved organic carbon (DOC) High temperature combustion 

and infrared detection

CAWSC, Sacramento, CA Stumpner and others (2015)

Total dissolved nitrogen (TDN) High temperature combustion 

and infrared detection

CAWSC, Sacramento, CA Bird and others (2003)

Total particulate carbon and 

nitrogen (TPCN)

High temperature combustion NWQL EPA Method 440.0, 

Zimmermann and others (1997)

Organic nitrogen and ammonia Colorimetric, 

phosphomolybdate-blue 

procedure

NWQL Fishman and Friedman (1989), 

Patton and Truitt (1992)

Ammonia and ammonium Colorimetric after 

alicylatehypochlorite 

NWQL Fishman (1993)

Nitrate and nitrite Diazotization after reduction NWQL Fishman (1993)

Nitrite Colorimetric after diazotization NWQL Fishman (1993)

Total phosphorus Colorimetric after Kjeldahl 

digestion

NWQL Patton and Truitt (1992)

Orthophosphate Colorimetric, 

phosphomolybdate-blue 

procedure

NWQL Fishman (1993),

Patton and Truitt (1992)

Alkalinity Titration NWQL Fishman and Friedman (1989)

Chlorophyll a and pheophytin a Fluorescence NWQL EPA Method 445.0, 

Arar and Collins (1997)

Choride Ion-exchange chromatographic NWQL Fishman and Friedman (1989)

Sulfate Ion-exchange chromatographic NWQL Fishman and Friedman (1989)

Suspended sediment (SSC) Gravimetry CAWSC, Santa Cruz, CA Guy (1969), 

Matthes and others (1992)

Cations and trace elements ICP-AES and ICP-MS NRP-CB, Boulder, CO Fishman and Friedman (1989), 

Garbarino and Taylor (1996), 

Mitko and Bebek (1999, 2000)
Table 1–2. Analytical methods used for the determination of constituents in sediment and particulates by the U.S. Geological Survey (USGS) Nationa(NWQL), National Research Program (NRP), and additional laboratories. [AES, atomic emission spectrometry; CA, California; CAWSC, California Water Science Center; CB, Central Branch; CO, Colorado; ICP, inductively coupled plasma; MS, masBranch; °C, degree Celsius] Analyte(s) Analytical methods USGS Laboratory 

Total mercury (THg) Atomic fluorescence NRP-WB, Menlo Park, CA Olund aMethylmercury (MeHg) Atomic fluorescence after ethlyation NRP-WB, Menlo Park, CA De Wild Reactive mercury (Hg(II)R) Atomic fluorescence after reaction with tin dichloride (SnCl2) NRP-WB, Menlo Park, CA Marvin-DiPaMajor elements and trace elements ICP-AES and ICP-MS NRP-CB, Boulder, CO Fishman a

 Garbarino 

Mitko and 

Ferrous iron (Fe(II)) Spetrophotometry after weak acid extraction NRP-WB, Menlo Park, CA Lovley aCrystalline ferric iron (Fe(III)c) Spetrophotometry after weak acid extraction NRP-WB, Menlo Park, CA Roden aAmorphous ferric iron (Fe(III)a) Following Fe(II) method, reduction and spectrophotometry NRP-WB, Menlo Park, CA Lovley aTotal reduced sulfur (TRS) Heated acid and chromium distillation NRP-WB, Menlo Park, CA Fossing anBulk density Weight: volume ratio NRP-WB, Menlo Park, CA American Public Dry weight Drying at 105 °C NRP-WB, Menlo Park, CA American Public Porosity Drying at 105 °C NRP-WB, Menlo Park, CA American Public Loss on ignition (LOI) Drying at 500 °C NRP-WB, Menlo Park, CA American Public Grain-size distribution Sieving NRP-WB, Menlo Park, CA Matthes Grain-size distribution Laser scattering CAWSC, Sacramento, CA Eschel 

Table 1–3. Analytical methods used for the determination of constituents in fish. [CA, California; EPA, U.S. Environmental Protection Agency; ICP, inductively coupled plasma; MS, mass spectrometry; NRP, National Research Program; UCD, University of USGS, U.S. Geological Survey; WB, Western Branch] Analyte(s) Analytical methods Laboratory 

Total mercury (THg) Atomic absorption UCD, Davis, CA Selenium (Se) ICP-MS USGS NRP-WB, Menlo Park, CA Elrick a

EPA Meth

Presse
Appendix 1. Analytical Methods Used for Water, Sediment, and Fish Tissue 87

References Cited

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nonfiltrable residue dried at 103–105 °C, section 209 

C in Franson, M.A.H., ed., Standard methods for 

the examination of water and wastewater (15th ed.): 

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

American Water Works Association, Water Pollution 

Control Federation, p. 94–95.

American Public Health Association, 1981b, Volatile and fixed 

matter in nonfilterable residue and in solid and semisolid 

samples, section 209 G in Franson, M.A.H., ed., Standard 

methods for the examination of water and wastewater 

(15th ed.): Washington, D.C., American Public Health 

Association, American Water Works Association, Water 

Pollution Control Federation, p. 97–99.

Arar, E.J., and Collins, G.B., 1997, Method 445.0—In vitro

determination of chlorophyll a and pheophytin a in marine 

and freshwater algae by fluorescence: U.S. Environmental 

Protection Agency, Office of Research and Development, 

National Exposure Research Laboratory, rev. 1.2, 

22 p., https://cfpub.epa.gov/si/si_public_record_report.

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Bird, S.M., Fram, M.S., and Crepeau, K.L., 2003, Method of 

analysis by the U.S. Geological Survey California District 

Sacramento Laboratory—Determination of dissolved 

organic carbon in water by high temperature catalytic 

oxidation, method validation, and quality-control practices: 

U.S. Geological Survey Open-File Report 2003–366, 14 p., 

https://pubs.er.usgs.gov/publication/ofr03366.

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Determination of methyl mercury by aqueous phase 

Eehylation, followed by gas chromatographic separation 

with cold vapor atomic fluorescence detection: 

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Elrick, K.A., and Horowitz, A.J., 1985, Analysis of rocks 

and sediments for arsenic, antimony, and selenium, by wet 

digestion and hydride atomic absorption: U.S. Geological 

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Florida Department of Environmental Protection, 2011, 

Equipment and software utilized in the determination 

of methylmercury by Purge & Trap/GC/AFD: Florida 

Department of Environmental Protection, HG-002-2:10, 

10 p.

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Measurement of volatile organic compounds in 

sediment, tissue, and waste by gas chromatography/

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Protection, VO-003-4.15, 29 p., ftp://ftp.dep.state.fl.us/pub/

labs/lds/sops/7190.pdf.

Fishman, M.J., and Friedman, L.C., eds., 1989, Methods for 

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Fishman, M.J., ed., 1993, Methods of analysis by the 

U.S. Geological Survey National Water Quality 

Laboratory—Determination of inorganic and 

organic constituents in water and fluvial sediments: 

U.S. Geological Survey Open-file Report 93–125, 217 p., 

https://pubs.er.usgs.gov/publication/ofr93125.

Fossing, Henrik, and Jørgensen, B.B., 1989, Measurement of 

bacterial sulfate reduction in sediments—Evaluation of a 

single-step chromium reduction method: Biogeochemistry, 

v. 8, no. 3, p. 205–222, https://link.springer.com/content/

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Garbarino, J.R., and Taylor, H.E., 1996, Inductively 

coupled plasma-mass spectrometric method for the 

determination of dissolved trace elements in natural water: 

U.S. Geological Survey Open-File Report 94–358, 49 p., 

https://pubs.er.usgs.gov/publication/ofr94358.

Guy, H.P., 1969, Laboratory theory and methods for sediment 

analysis: U.S. Geological Survey Techniques of WaterResources Investigations, book 5, chap. C1, 58 p., 

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Liber, Karsten, 2012, Digestion protocols for tissue, sediment, 

and water: Toxicology Centre, University of Saskatchewan, 

Saskatoon, Canada, 4 p.

Lovley, D.R., and Phillips, E.J.P., 1986, Organic matter 

mineralization with reduction of ferric iron in anaerobic 

sediments: Applied and Environmental Microbiology, 

v. 51, no. 4, p. 683–689, 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC238947/.

Marvin-DiPasquale, Mark, and Cox, M.H., 2007, Legacy 

mercury in Alviso Slough, South San Francisco Bay, 

California—Concentration, speciation and mobility: 

U.S. Geological Survey Open-File Report 2007–1240, 

99 p., https://pubs.er.usgs.gov/publication/ofr20071240.

Matthes, W.J., Sholar, C.J., and George, J.R., 1992, Qualityassurance plan for the analysis of fluvial sediment by 

laboratories of the U.S. Geological Survey: U.S. Geological 

Survey Open-File Report 91–467, 31 p., 

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88 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Mitko, Krzysztof, and Bebek, Malgorzata, 1999, ICP-OES 

determination of trace elements in salinated water samples: 

Atomic Spectroscopy, v. 20, p. 217–223. 

Mitko, Krzysztof, and Bebek, Malgorzata, 2000, 

Determination of major elements in saline water samples 

using a dual-view ICP-OES: Atomic Spectroscopy, v. 21, 

p. 77–85. 

Olund, S.D., DeWild, J.F., Olson, M.L., and Tate, M.T., 

2004, Methods for the preparation and analysis of solids 

and suspended solids for total mercury; Chapter 8 of 

book 5, Laboratory analysis, section A, Water analysis: 

U.S. Geological Survey Techniques and Methods 5 A–8, 

23 p., https://pubs.er.usgs.gov/publication/tm5A8.

Patton, C.J., and Truitt, E.P., 1992, Methods of analysis 

by the U.S. Geological Survey National Water Quality 

Laboratory—Determination of the total phosphorus 

by a Kjeldahl digestion method and an automated 

colorimetric finish that includes dialysis: U.S. Geological 

Survey Open-File Report 92–146, 39 p., 

https://pubs.er.usgs.gov/publication/ofr92146.

Presser, T.S., and Barnes, Ivan, 1984, Selenium 

concentrations in waters tributary to and in the vicinity 

of the Kesterson National Wildlife Refuge, Fresno and 

Merced Counties, California: U.S. Geological Survey 

Water-Resources Investigation Report 84–4122, 26 p., 

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Stumpner, E.B., Kraus, T.E.C., Fleck, J.A., Hansen, 

A.M., Bachand, S.M., Horwath, W.R., DeWild, J.F., 

Krabbenhoft, D.P., and Bachand, P.A.M., 2015, Mercury, 

monomethyl mercury, and dissolved organic carbon 

concentrations in surface water entering and exiting 

constructed wetlands treated with metal-based coagulants, 

Twitchell Island, California: U.S. Geological Survey Data 

Series 950, 26 p., https://doi.org/10.3133/ds950.

U.S. Environmental Protection Agency, 2002a, Guidelines 

establishing test procedures for the analysis of pollutants; 

Measurement of mercury in water; Revisions to 

EPA Method 1631: Federal Register, v. 67, no. 209, 

p. 65876–65888, https://www.federalregister.gov/

documents/2002/10/29/02-27136/guidelines-establishingtest-procedures-for-the-analysis-of-pollutants-measurementof-mercury-in. 

U.S. Environmental Protection Agency, 2002b, Method 1631, 

Revision E—Mercury in water by oxidation, purge and 

trap, and cold vapor atomic fluorescence spectrometry: 

U.S. Environmental Protection Agency EPA-821-R-02-019, 

38 p., https://www.epa.gov/sites/production/files/2015-08/

documents/method_1631e_2002.pdf.

U.S. Environmental Protection Agency, 2007, Method 6800—

Elemental and molecular speciated isotope dilution mass 

spectrometry: U.S. Environmental Protection Agency, 

47 p., https://www.epa.gov/sites/production/files/2015-12/

documents/6800.pdf.

Zimmermann, C.F., Keefe, C.W., and Bashe, Jerry, 1997, 

Method 440.0—Determination of carbon and nitrogen 

in sediments and particulates of estuarine/coastal waters 

using elemental analysis: U.S. Environmental Protection 

Agency, EPA-600-R-15-009, 10 p., https://cfpub.epa.gov/si/

si_public_record_report.cfm?dirEntryId=309418.
Appendix 2. Quality-Assurance Data for Surface Water 89

Appendix 2. Quality-Assurance Data for Surface Water

Table 2–1A. Quality-assurance data for surface-water total mercury (filtered), standard reference material and matrix spike.

[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Method detection limit 

(MDL) = 0.04 nanogram per liter (ng/L; 2011); 0.06 ng/L (2012). Abbreviations: Dup, duplicate; MB, matrix blank; mm/dd/yyyy, month/day/year; MS, matrix 

spike; MSD, matrix spike duplicate; nd, not determined; RPD, relative percent difference; SRM, standard reference material; <, less than]

Analytical 

batch 

number

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

MB 

(ng/L)

SRM 

percent 

recovery

Dup 

percent 

difference

MS 

percent 

recovery

MSD 

percent 

recovery

MSD 

RPD 

(percentage)

owHgT20120323 09/07/2011 11/02/2011 nd 113.1 nd 96.3 nd nd

owHgT20120323 09/07/2011 11/02/2011 <MDL nd nd 97.1 nd nd

owHgT20130105 08/30/2012 11/15/2012 nd 112.0 nd 93.4 nd nd

owHgT20130105 08/30/2012 11/15/2012 <MDL 112.0 nd 89.6 nd nd

owHgT20130105 08/30/2012 11/15/2012 nd nd nd 88.3 nd nd

Table 2–1B. Quality-assurance data for surface-water total 

mercury (filtered), equipment blanks.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch, Menlo Park, California. Method detection 

limit (MDL) = 0.04 nanogram per liter (ng/L; 2011); 0.06 ng/L (2012). 

Abbreviations: E, estimated; ID, identification; mm/dd/yyyy, month, day, 

year; THg, total mercury; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

THg

(ng/L)

09/08/2011 SNI-004 0.10

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 E0.09

Table 2–1C. Quality-assurance data for surface-water total 

mercury (filtered), field replicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch, Menlo Park, California. Method detection 

limit (MDL) = 0.04 nanogram per liter (ng/L; 2011); 0.06 ng/L (2012). 

Abbreviations: E, estimated; env, environmental; ID, identification; 

mm/dd/yyyy, month/day/year; rep, replicate; RPD, relative percent difference; 

THg, total mercury; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

THg 

rep 

(ng/L)

THg 

env 

(ng/L)

THg 

RPD 

(percent)

09/07/2011 SNI-003 E0.37 E0.50 30

08/30/2012 SNI-041 E0.18 E0.20 11

11/07/2012 SNQ-054 0.60 0.59 1.7
90 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 2–2A. Quality-assurance data for surface-water total mercury (particulate), standard reference material and matrix spike.

[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Method detection limit 

(MDL) = 0.07 nanogram per liter (ng/L). Abbreviations: MB, matrix blank; mm/dd/yyyy, month/day/year; MS, matrix spike; MSD, matrix spike duplicate; 

nd, not determined; RPD, relative percent difference; SRM, standard reference material; <, less than]

Analytical 

batch number

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

MB 

(ng/L)

SRM 

percent 

recovery

Duplicate 

percent 

difference

MS 

percent 

recovery

MSD 

percent 

recovery

MSD 

RPD 

(percentage)

pTHg20120627 09/07/2011 11/02/2011 <MDL 91.39 nd nd nd nd

pTHg20130109 08/30/2012 11/15/2012 9.03 85.07 nd nd nd nd

pTHg20130114 08/30/2012 11/15/2012 <MDL 87.45 nd nd nd nd

pTHg20130117 08/30/2012 11/15/2012 3.35 84.65 nd nd nd nd

pTHg20130117 08/30/2012 11/15/2012 <MDL 83.98 nd nd nd nd

Table 2–2B. Quality-assurance data for surface-water total 

mercury (particulate), equipment blanks.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch, Menlo Park, California. Method detection limit 

(MDL) = 0.07 nanogram per liter (ng/L). Abbreviations: ID, identification; 

mm/dd/yyyy, month/day/year; THg‐p, total mercury (particulate); <, less than]

Date

(mm/dd/yyyy)

Project 

ID

THg-p

(ng/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–2C. Quality-assurance data for surface-water total 

mercury (particulate), field replicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch, Menlo Park, California. Method detection limit 

(MDL) = 0.07 nanogram per liter (ng/L). Abbreviations: E, estimated 

value - concentration between MDL and lowest calibration standard; 

env, environmental; ID, identification; mm/dd/yyyy, month/day/year; 

rep, replicate; RPD, relative percent difference; THg‐p, total mercury 

(particulate); <, less than]

Date

(mm/dd/yyyy)

Project 

ID

THg-p 

rep 

(ng/L)

THg-p 

env 

(ng/L)

THg-p 

RPD 

(percent)

09/07/2011 SNI-003 E0.28 E0.20 33

08/30/2012 SNI-041 0.12 E0.058 70

11/07/2012 SNQ-054 E0.14 E0.15 6.9
Appendix 2. Quality-Assurance Data for Surface Water 91

Table 2–3A. Quality-assurance data for surface-water methylmercury (filtered), standard reference materials and matrix spikes.

[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Method detection limit 

(MDL) = 0.004 nanogram per liter (ng/L). Abbreviations: MB, matrix blank; mm/dd/yyyy, month/day/year; MS, matrix spike; MSD, matrix spike duplicate; 

nd, not determined; RPD, relative percent difference; SRM, standard reference material; <, less than]

Analytical 

batch 

number

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

MB 

(ng/L)

SRM 

percent 

recovery

Duplicate 

percent 

difference

MS 

percent 

recovery

MSD 

percent 

recovery

MSD 

RPD 

(percentage)

owMeHg20120301 09/07/2011 11/02/2011 0.004 106.5 nd 106.5 nd nd

owMeHg20120301 09/07/2011 11/02/2011 0.005 99.2 nd nd nd nd

owMeHg20120228 09/07/2011 11/02/2011 0.005 107.8 nd nd nd nd

owMeHg20130213 08/30/2012 11/15/2012 0.008 110.5 nd 99.2 nd nd

owMeHg20130116 08/30/2012 11/15/2012 0.004 nd nd 107.8 nd nd

owMeHg20130306 08/30/2012 11/15/2012 nd nd nd 110.5 nd nd

Table 2–3B. Quality-assurance data for surface-water 

methylmercury (filtered), equipment field blanks.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch, Menlo Park, California. Method detection limit 

(MDL) = 0.004 nanogram per liter (ng/L). Abbreviations: ID, identification; 

MeHg, methylmercury; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

MeHg

(ng/L)

09/08/2011 SNI-004 < MDL

09/21/2011 SNI-010 < MDL

11/03/2011 SNI-015 0.006

09/20/2012 SNQ-002 < MDL

10/16/2012 SNQ-003 < MDL

Table 2–3C. Quality-assurance data for surface-water 

methylmercury (filtered), field replicates.

[All analyses performed at U.S. Geological Survey National 

Research Program, Western Branch, Menlo Park, California. 

Method detection limit (MDL) = 0.004 nanogram per liter (ng/L). 

Abbreviations: env, environmental; ID, identification; MeHg, methylmercury; 

rep, replicate; RPD, relative percent difference; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

MeHg-f 

rep 

(ng/L)

MeHg 

env 

(ng/L)

MeHg 

RPD 

(percentage)

09/07/2011 SNI-003 0.027 0.028 3.6

08/30/2012 SNI-041 0.042 0.037 13

11/07/2012 SNQ-054 0.021 0.032 42
92 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 2–4A. Quality-assurance data for surface-water methylmercury (particulate), standard reference materials and matrix spikes.

[All analyses performed at U.S. Geological Survey National Research Program, Western Branch, Menlo Park, California. Method detection 

limit (MDL) = 0.12 picogram/gram (pg/g), corresponding to a volumetric concentration of approximately 0.004 nanogram per liter (ng/L). 

Abbreviations: MB, matrix blank; mm/dd/yyyy, month/day/year; MS, matrix spike; MSD, matrix spike duplicate; nd, not determined; RPD, relative percent 

difference; SRM, standard reference material; <, less than]

Analytical 

batch number

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

MB 

(ng/L)

SRM 

percent 

recovery

Duplicate 

percent 

difference

MS 

percent 

recovery

MSD 

percent 

recovery

MSD RPD 

(percentage)

pMeHg20120622 09/07/2011 11/02/2011 <MDL 107 nd nd nd nd

pMeHg20120622 09/07/2011 11/02/2011 <MDL nd nd nd nd nd

pMeHg20120626 09/07/2011 11/02/2011 <MDL 102 nd nd nd nd

pMeHg20130227 08/30/2012 11/15/2012 <MDL 113 4.03 nd nd nd

pMeHg20130227 08/30/2012 11/15/2012 <MDL 99.2 nd nd nd nd

pMeHg20130227 08/30/2012 11/15/2012 <MDL 98.1 nd nd nd nd

Table 2–4B. Quality-assurance data for surface-water 

methylmercury (particulate), equipment blanks.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch, Menlo Park, California. Method detection 

limit (MDL) = 0.12 picogram per gram (pg/g), corresponding to a 

volumetric concentration of approximately 0.004 nanogram per liter (ng/L). 

Abbreviations: ID, identification; MeHg-p, particulate methylmercury; 

mm/dd/yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

MeHg-p

(ng/L)

09/08/2011 SNI-004 <0.004

09/21/2011 SNI-010 <0.004

11/03/2011 SNI-015 <0.004

09/20/2012 SNQ-002 <0.004

10/16/2012 SNQ-003 <0.004

Table 2–4C. Quality-assurance data for surface-water 

methylmercury (particulate), field replicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch, Menlo Park, California. Method detection 

limit (MDL) = 0.12 picogram per gram (pg/g), corresponding to a 

volumetric concentration of approximately 0.004 nanogram per liter (ng/L). 

Abbreviations: env, environmental; ID, identification; MeHg-p, particulate 

methylmercury; mm/dd/yyyy, month/day/year; rep, replicate; RPD, relative 

percent difference; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

MeHg-p 

rep 

(ng/L)

MeHg-p 

env 

(ng/L)

MeHg-p 

RPD 

(percentage)

09/07/2011 SNI-003 0.011 0.012 8.7

08/30/2012 SNI-041 0.009 0.007 25

11/07/2012 SNQ-054 0.007 0.009 25
Appendix 2. Quality-Assurance Data for Surface Water 93

Table 2–5. Quality-assurance data for replicate analyses of 

surface-water total suspended solids.

[N=2. Abbreviations: AVG, average concentration of pair; DEV, deviation, 

equal to half of absolute difference; ID, identification; mg/L, milligram per 

liter; %DEV, DEV expressed as a percentage of AVG]

Batch 

code

Sample 

ID

AVG 

(mg/L)

DEV 

(mg/L) %DEV

TSS20120416 SNI-001 0.43 0.11 26

TSS20120416 SNI-002 0.33 0.03 10

TSS20120416 SNI-003 0.41 0.04 9.4

TSS20120416 SNI-005 0.97 0.03 2.8

TSS20120416 SNI-006 2.84 0.21 7.2

TSS20120416 SNI-007 2.33 0.37 16

TSS20120416 SNI-009 1.78 0.08 4.6

TSS20120416 SNI-011 3.00 0.80 27

TSS20120416 SNI-013 0.29 0.21 71

TSS20120416 SNI-012 0.17 0.09 56

TSS20130107 SNI-040 0.32 0.08 26

TSS20130107 SNI-041 0.68 0.03 4.1

TSS20130107 SNI-042 8.70 0.56 6.4

TSS20130107 SNI-044 0.35 0.02 5.8

TSS20130107 SNI-045 2.31 0.20 8.8

TSS20130107 SNI-046 0.49 0.00 0.2

TSS20130107 SNI-047 0.53 0.01 2.3

TSS20130107 SNI-048 0.25 0.06 25

TSS20130107 SNI-049 0.90 0.10 11

TSS20130107 SNI-050 1.53 0.07 4.3

TSS20130107 SNI-052 0.64 0.15 23

TSS20130107 SNI-054 1.08 0.00 0.3

TSS20130107 SNQ-054 0.98 0.02 2.4

TSS20130107 SNI-053 3.49 0.26 7.5

TSS20130107 SNI-055 1.49 0.09 5.8

TSS20130107 SNI-056 0.14 0.10 73

TSS20130107 SNI-057 0.22 0.19 85
Table 2–6A. Quality-assurance data for surface-water dissolved organic carbon (DOC), standard reference materials, lab duplicates, and matrix spi[Laboratory reporting limit (LRL) for DOC is 0.3 milligram per liter (mg/L). Abbreviations: dup, duplicate; ID, identification; KHP, potassium hydrogen phthalate; mm/dd/yyyspike; n, number of analyses; nd, not determined; RPD, relative percent difference; RSD, relative standard deviation; SRM, standard reference material; <, less than] Analytical batch ID (mm/dd/yyyy) Collection date start (mm/dd/yyyy) Collection date end (mm/dd/yyyy) Laboratory blank (n) Average laboratory blank (mg/L) KHP SRM (n) Average KHP SRM percent recovery KHP percent RSD Caffeine SRM (n) Averag

SRM 

rec

09/19/2012 08/30/2012 09/06/2012 22 <LRL 10 97.0 1.7 4 110/02/2012 09/20/2012 09/25/2012 18 <LRL 8 98.3 0.75 4 110/18/2012 10/01/2012 10/03/2012 18 <LRL 8 105 2.3 4 1

11/01/2012 10/16/2012 10/31/2012 18 <LRL 8 97.9 5.1 4 111/30/2012 11/07/2012 11/15/2012 22 <LRL 10 97.0 2.3 4 09/12/2011 09/07/2011 09/08/2011 18 <LRL 8 93.2 2.7 4 109/22/2011 09/19/2011 09/20/2011 14 <LRL 6 98.2 3.4 3 110/04/2011 09/20/2011 09/21/2011 10 <LRL 4 92.1 7.1 2 

11/29/2011 11/02/2013 11/03/2011 14 <LRL 6 97.7 1.7 3 1

Analytical batch ID (mm/dd/yyyy) Collection date start (mm/dd/yyyy) Collection date end (mm/dd/yyyy) Laboratory duplicate (n) Average laboratory duplicate percent recovery Laboratory duplicate percent RSD Matrix spike (n) Average MS percen

recovery 

09/19/2012 08/30/2012 09/06/2012 6 98.8 36 6.0 92.7 10/02/2012 09/20/2012 09/25/2012 5 104 3.9 4.0 104.9 10/18/2012 10/01/2012 10/03/2012 5 101 3.4 4.0 100.3 

11/01/2012 10/16/2012 10/31/2012 5 105 6.7 4.0 100.7 11/30/2012 11/07/2012 11/15/2012 6 101 11 6.0 87.0 09/12/2011 09/07/2011 09/08/2011 5 99.4 3.3 4.0 96.4 09/22/2011 09/19/2011 09/20/2011 4 101 3.0 4.0 107.1 10/04/2011 09/20/2011 09/21/2011 2 105 5.1 2.0 96.5 

11/29/2011 11/02/2013 11/03/2011 4 101 3.6 4.0 109.6 
Appendix 2. Quality-Assurance Data for Surface Water 95

Table 2–6B. Quality-assurance data for surface-water dissolved 

organic carbon (DOC), equipment blanks.

[Laboratory reporting limit (LRL) for DOC is 0.3 milligram per liter (mg/L). 

Abbreviations: E, estimated; ID, identification; mm/dd/yyyy, month/day/

year]

Date

(mm/dd/yyyy)

Project 

ID

DOC

(mg/L)

09/08/2011 SNI-004 E0.12

09/21/2011 SNI-010 E0.11

09/20/2012 SNQ-002 E0.10

10/16/2012 SNQ-003 0.44

Table 2–6C. Quality-assurance data for surface-water dissolved 

organic carbon (DOC), field replicates.

[Laboratory reporting limit (LRL) for DOC is 0.3 milligram per liter (mg/L). 

Abbreviations: env, environmental sample; ID, identification; mm/dd/yyyy, 

month/day/year; rep, replicate; RPD, relative percent deviation]

Date

(mm/dd/yyyy)

Project 

ID

DOC rep 

(mg/L)

DOC env 

(mg/L)

DOC RPD 

(percentage)

09/07/2011 SNI-003 0.51 0.59 15

08/30/2012 SNI-041 0.60 0.62 3.3

11/07/2012 SNQ-054 1.7 1.7 0.0

Table 2–7A. Quality assurance data for surface-water absorbance spectral indicators, equipment blanks.

[All analyses performed at the U.S. Geological Survey California Water Science Center. Method detection limit (MDL) for A254 is 0.008 absorbance units (AU), 

A280 is 0.006 AU, A370 is 0.005 AU, A412 is 0.004 AU, and A440 is 0.004 AU. Abbreviations: Axxx, absorbance at xxx nanometer (nm); ID, identification; 

L mg–1m–1, liter per milligram per meter; mmm/dd/yyyy, month/day/year; na, not applicable; Sagxxx–xxx, spectral slope ratio between xxx nm and xxx nm; 

SUVA, specific ultraviolet absorbance; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

A254

(AU)

A280

(AU)

A370

(AU)

A412

(AU)

A440

(AU)

SUVA254

(L mg–1m–1) Sag275–290 Sag290–350 Sag350–400 Sag412–676

09/08/2011 SNI-004 <MDL <MDL <MDL <MDL <MDL na na na na na

09/21/2011 SNI-010 <MDL <MDL <MDL <MDL <MDL na na na na na

11/03/2011 SNI-015 <MDL <MDL <MDL <MDL <MDL na na na na na

09/20/2012 SNQ-002 <MDL <MDL <MDL <MDL <MDL na na na na na

10/16/2012 SNQ-003 <MDL <MDL <MDL <MDL <MDL na na na na na
Table 2–7B. Quality assurance data for surface-water absorbance spectral indicators, field replicates. [All analyses performed at the California Water Science Center in Sacramento, CA. Method detection limit (MDL) for A254 is 0.008 absorbance units (AU), A280 is 0.006 AU, A37

and A440 is 0.004 AU. Abbreviations: Axxx, absorbance at xxx nanometers (nm); E, estimated; ID, identification; mm/dd/yyyy, month/day/year; RPD, relative percent difference; between xxx nm and xxx nm; SUVA, specific ultraviolet absorbance] Date (mm/dd/yyyy) Project ID A254 (AU) A280 (AU) A370 (AU) A412 (AU) A440 (AU) SUVA254 (L mg–1m–1) Sag275–295 Sag290–350 

09/07/2011 SNI-003 E0.01 E0.01 E0.003 E0.001 E0.001 E2.8 0.02 0.01 

08/30/2012 SNI-041 0.02 0.02 E0.0002 E0.0007 E0.0007 2.8 0.01 0.02 

11/07/2012 SNQ-054 0.05 0.04 0.01 E0.005 E0.003 3.2 0.02 0.02 

Date (mm/dd/yyyy) Project ID A254 (RPD) A280 (RPD) A370 (RPD) A412 (RPD) A440 (RPD) SUVA254 (RPD) Sag275–295 (RPD) Sag290–350 (RPD) 

09/07/2011 1SNI-003 nd nd nd nd nd 15 3.1 5.4 

08/30/2012 2SNI-041 3.0 1.3 nd nd nd 0.3 8 6 

11/07/2012 3SNQ-054 2.3 3.0 nd nd nd 3 3 1.7 

1Compared with sample SNI-002. 2Compared with sample SNI-040. 3Compared with sample SNI-054. Table 2–8A. Quality assurance data for surface-water fluorescence spectral indicators, equipment blanks. [All analyses performed at the U.S. Geological Survey California Water Science Center. Definitions of peaks at excitation-emission pairs are based on Stedmon and others (2003

Abbreviations: ex###em###, excitation at ### nanometer (nm)-emission at ### nm; fdom, fluorescence of dissolved organic matter; FI, fluorescence index, from Cory and McKindex, from Ohno (2002); ID, identification; MDL, method detection limit; mm/dd/yyyy, month/day/year; RU, Raman units; < , less than] Date (mm/dd/yyyy) Project ID peak A ex260em450 (RU) peak C ex340em440 (RU) peak M ex300em390 (RU) peak D ex390em510 (RU) peak B ex275em304 (RU) peak T ex275em340 (RU) peak N ex280em370 (RU) fdom ex370em460 (RU) 

09/08/2011 SNI-004 <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL 09/21/2011 SNI-010 <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL 

11/03/2011 SNI-015 <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL 

09/20/2012 SNQ-002 <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL 10/16/2012 SNQ-003 <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL 
Table 2–8B. Quality assurance data for surface-water fluorescence spectral indicators, field replicates.[All analyses performed at the U.S. Geological Survey California Water Science Center. Definitions of peaks at excitation-emission pairs are based on Stedmon and others (2003Abbreviations: ex###em###, excitation at ### nanometer (nm)-emission at ### nm; E, estimated; fdom, fluorescence of dissolved organic matter; FI, fluorescence index, from HIX, humic index, from Ohno (2002); ID, identification; MDL, method detection limit; mm/dd/yyyy, month/day/year; nd, not determined; RU, Raman units; RPD, relative perc

Date

(mm/dd/yyyy)

Project 

ID

peak A

ex260em450

(RU)

peak C

ex340em440

(RU)

peak M

ex300em390

(RU)

peak D

ex390em510

(RU)

peak B

ex275em304

(RU)

peak T

ex275em340

(RU)

peak N

ex280em370

(RU)

fdom

ex370em460

(RU)

09/07/2011 SNI-003 0.07 0.04 E0.03 0.02 <MDL E0.0301 E0.0275 E0.0329 

08/30/2012 SNI-041 0.07 0.04 E0.03 0.02 E0.02 E0.03 E0.03 0.030 

11/07/2012 SNQ-054 0.3 0.2 0.1 0.06 <MDL E0.06 0.1 0.1 

Date

(mm/dd/yyyy)

Project 

ID

peak A

ex260em450

(RPD)

peak C

ex340em440

(RPD)

peak M

ex300em390

(RPD)

peak D

ex390em510

(RPD)

peak B

ex275em304

(RPD)

peak T

ex275em340

(RPD)

peak N

ex280em370

(RPD)

fdom

ex370em460

(RPD)

09/07/2011 1SNI-003 5.4 3.3 3.3 3.4 0.7 nd nd 4.6 

08/30/2012 2SNI-041 4.7 0.2 nd 0.2 nd nd nd 0.6 

11/07/2012 3SNQ-054 2.3 3.1 0.4 1.5 6.7 39 10 0.5 

1Compared with sample SNI-002.2Compared with sample SNI-040.3Compared with sample SNI-054.

Table 2–8C. Quality-assurance data for surface-water fluorescence spectral indicators, field replicates.[All analyses performed at the U.S. Geological Survey California Water Science Center. Definitions of peaks at excitation-emission pairs are based on Stedmon and others (2003Abbreviations: ex###em###, excitation at ### nanometer (nm)-emission at ### nm; E, estimated; fdom, fluorescence of dissolved organic matter; FI, fluorescence index, from HIX, humic index, from Ohno (2002); ID, identification; MDL, method detection limit; mm/dd/yyyy, month/day/year; RU, Raman units; RPD, relative percent difference; <, les

Date

(mm/dd/yyyy)

Project 

ID

peak A

ex260em450

(RU)

peak C

ex340em440

(RU)

peak M

ex300em390

(RU)

peak D

ex390em510

(RU)

peak B

ex275em304

(RU)

peak T

ex275em340

(RU)

peak N

ex280em370

(RU)

fdom

ex370em460

(RU)

09/07/2011 SNI-003 0.07 0.04 E0.03 0.02 <MDL E0.0301 E0.0275 E0.0329 11/07/2012 SNQ-054 0.3 0.2 0.1 0.06 <MDL E0.06 0.1 0.1 

Date

(mm/dd/yyyy)

Project 

ID

peak A

ex260em450

(RPD)

peak C

ex340em440

(RPD)

peak M

ex300em390

(RPD)

peak D

ex390em510

(RPD)

peak B

ex275em304

(RPD)

peak T

ex275em340

(RPD)

peak N

ex280em370

(RPD)

fdom

ex370em460

(RPD)

09/07/2011 SNI-003 5.4 3.3 3.3 3.4 0.7 41 15 4.6 11/07/2012 SNQ-054 2.3 3.1 0.4 1.5 6.7 39 10 0.5 
98 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 2–9A. Quality-assurance data for surface-water total 

particulate carbon and nitrogen, equipment blanks.

[All analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) was 

0.03 milligram per liter (mg/L) for particulate inorganic carbon (PIC), 0.05 

to 0.12 mg/L for particulate organic carbon (POC), 0.05 mg/L for total 

particulate carbon (TPC), and 0.017 mg/L for total particulate nitrogen (TPN). 

Abbreviations: ID, identification; mm/dd/yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

PIC 

(mg/L)

POC 

(mg/L)

TPC 

(mg/L)

TPN

(mg/L)

09/08/2011 SNI-004 <0.03 <0.12 <0.05 <0.017

09/21/2011 SNI-010 <0.03 <0.12 <0.05 <0.017

Table 2–9B. Quality-assurance data for surface-water total particulate carbon and nitrogen, field replicates.

[All analyses completed at the U.S. Geological Survey National Water Quality Laboratory, Denver, Colorado. Method detection limit (MDL) was 0.03 milligram 

per liter (mg/L) for particulate inorganic carbon (PIC), 0.05 to 0.12 mg/L for particulate organic carbon (POC), 0.05 mg/L for total particulate carbon (TPC), 

and 0.017 mg/L for total particulate nitrogen (TPN). Abbreviations: ID, identification; lt, both replicate and environmental sample less than (<) MDL; mm/dd/

yyyy, month/day/year; nd, not determined; rep., replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

PIC 

rep

(mg/L)

POC 

rep

(mg/L)

TPC 

rep

(mg/L)

TPN 

rep

(mg/L)

PIC 

RPD

(percentage)

POC 

RPD

(percentage)

TPC 

RPD

(percentage)

TPN

RPD

(percentage)

09/07/2011 1SNI-003 <0.03 <0.12 <0.05 <0.017 0, lt 0, lt 0, lt nd

11/07/2012 2SNQ-054 <0.03 0.12 0.13 0.12 0. lt 8.7 0 86

1

Compared with sample SNI-002.

2

Compared with sample SNI-054.

Table 2–10A. Quality-assurance data for surface-water organic 

nitrogen plus ammonia (unfiltered), equipment blanks.

[All analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.07 milligram per liter (mg/L). Abbreviations: ID, identificaton; mm/dd/

yyyy, month/day/year; <, less than; +, plus]

Date

(mm/dd/yyyy)

Project 

ID

Organic 

nitrogen + ammonia 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–10B. Quality-assurance data for surface-water organic 

nitrogen plus ammonia (unfiltered), field replicates.

[All analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.07 milligram per liter (mg/L). Abbreviations: ID, identification; lt, both 

replicate and environmental sample less than (<) MDL; mm/dd/yyyy, month/

day/year; nd, not determined; Rep, replicate]

Date

(mm/dd/yyyy)

Project 

ID

Rep

(mg/L)

RPD 

(percentage)

09/07/2011 1SNI-003 <0.05 0, lt

08/30/2012 2SNI-041 nd nd

11/07/2012 3SNQ-054 0.12 8.7

1

Compared with sample SNI-002.

2

Compared with sample SNI-040.

3

Compared with sample SNI-054.
Appendix 2. Quality-Assurance Data for Surface Water 99

Table 2–11A. Quality-assurance data for surface-water organic 

nitrogen plus ammonia (filtered), equipment blanks.

[All analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.07 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than; +, plus]

Date

(mm/dd/yyyy)

Project 

ID

Organic 

nitrogen + ammonia 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–11B. Quality-assurance data for surface-water organic 

nitrogen plus ammonia (filtered), field replicates.

[All analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.07 milligram per liter (mg/L). Abbreviations: ID, identification; lt, both 

replicate and environmental sample less than (<) MDL; mm/dd/yyyy, month/

day/year; Rep, replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Rep 

(mg/L)

RPD

(percentage)

09/07/2011 SNI-003 <0.07 0, lt

08/30/2012 SNI-041 <0.07 0, lt

11/07/2012 SNQ-054 0.14 7.4

Table 2–12A. Quality-assurance data for surface-water nitrate 

plus nitrite (filtered), equipment blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.04 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than; +, plus]

Date

(mm/dd/yyyy)

Project 

ID

Nitrate + Nitrite 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 0.06

Table 2–12B. Quality-assurance data for surface-water nitrate 

plus nitrite (filtered), field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.04 milligram per liter (mg/L). Abbreviations: ID, identification; lt, both 

replicate and environmental sample less than (<) MDL; mm/dd/yyyy, month/

day/year; Rep, replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Rep 

(mg/L)

RPD 

(percentage)

09/07/2011 SNI-003 0.024 4.3

08/30/2012 SNI-041 <0.04 0, lt

11/07/2012 SNQ-054 <0.04 0, lt
100 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 2–13A. Quality-assurance data for surface-water 

ammonia (filtered), equipment blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.01 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

Ammonia 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–13B. Quality-assurance data for surface-water 

ammonia (filtered), field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.01 milligram per liter (mg/L). Abbreviations: ID, identification; lt, both 

replicate and environmental sample less than (<) MDL; mm/dd/yyyy, month/

day/year; nd, not determined; Rep, replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Rep 

(mg/L)

RPD 

(percentage)

09/07/2011 SNI-003 <0.01 nd

08/30/2012 SNI-041 <0.01 0, lt

11/07/2012 SNQ-054 <0.01 0, lt

Table 2–14A. Quality-assurance data for surface-water nitrite 

(filtered), equipment blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.001 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

Nitrite 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–14B. Quality-assurance data for surface-water nitrite 

(filtered), field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.001 milligram per liter (mg/L). Abbreviations: ID, identification; lt, both 

replicate and environmental sample less than (<) MDL; mm/dd/yyyy, month/

day/year; Rep, replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Rep 

(mg/L)

RPD 

(percentage)

09/07/2011 SNI-003 <0.001 0, lt

08/30/2012 SNI-041 <0.001 0, lt

11/07/2012 SNQ-054 <0.001 0, lt
Appendix 2. Quality-Assurance Data for Surface Water 101

Table 2–15A. Quality-assurance data for surface-water total 

phosphorus (unfiltered), equipment blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.004 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

Total phosphorus 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–15B. Quality-assurance data for surface-water total 

phosphorus (unfiltered), field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.004 milligram per liter (mg/L). Abbreviations: ID, identification; lt, both 

replicate and environmental sample less then (<) MDL; mm/dd/yyyy, month/

day/year; nd, not determined; Rep, replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Rep 

(mg/L)

RPD 

(percentage)

09/07/2011 SNI-003 <0.004 0, lt

08/30/2012 SNI-041 nd nd

11/07/2012 SNQ-054 0.017 0.0

Table 2–16A. Quality-assurance data for surface water total 

phosphorus (filtered), equipment blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.003 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

Total phosphorus 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–16B. Quality-assurance data for surface water total 

phosphorus (filtered), field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.003 milligram per liter (mg/L). Abbreviations: ID, identification; lt, both 

replicate and environmental sample less than (<) MDL; mm/dd/yyyy, month/

day/year; rep, replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Rep 

(mg/L)

Env 

(mg/L)

RPD 

(percentage)

09/07/2011 SNI-003 <0.003 <0.003 0, lt

08/30/2012 SNI-041 0.008 0.008 0.0

11/07/2012 SNQ-054 0.013 0.013 0.0
102 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 2–17A. Quality-assurance data for surface-water 

orthophosphate (filtered), equipment blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.004 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

ortho phosphate 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–17B. Quality-assurance data for surface-water 

orthophosphate (filtered), field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.004 milligram per liter (mg/L). Abbreviations: env, environmental sample; 

ID, identification; mm/dd/yyyy, month/day/year; rep, replicate; RPD, relative 

percent difference]

Date

(mm/dd/yyyy)

Project 

ID

ortho 

phosphate 

rep 

(mg/L)

ortho 

phosphate 

env 

(mg/L)

RPD

(percentage)

09/07/2011 SNI-003 0.005 0.005 0.0

08/30/2012 SNI-041 0.010 0.010 0.0

11/07/2012 SNQ-054 0.011 0.011 0.0

Table 2–18A. Quality-assurance data for surface-water 

alkalinity, equipment blanks.

[Analyses completed at the U.S. Geological Survey National Water Quality 

Laboratory, Denver, Colorado. Abbreviations: CaCO3, calcium carbonate; 

ID, identification; mg/L, milligram per liter; mm/dd/yyyy, month/day/year]

Station 

ID

Date

(mm/dd/yyyy)

Alkalinity

(mg/L as CaCO3)

SNI-010 09/21/2011 4.0

SNI-015 11/03/2011 2.7

SNQ-002 09/20/2012 3.4

SNQ-003 10/16/2012 4.6
Appendix 2. Quality-Assurance Data for Surface Water 103

Table 2–18B. Quality-assurance data for surface-water alkalinity, field replicates.

[Analyses completed at the U.S. Geological Survey National Water Quality Laboratory, Denver, Colorado. Abbreviations: CaCO3, calcium carbonate; 

env, environmental sample; ID, identification; mg/L, milligram per liter; mm/dd/yyyy, month/day/year; rep, replicate; RPD, relative percent difference]

Station 

ID

Project 

ID

Date

(mm/dd/yyyy)

Alkalinity rep

(mg/L as CaCO3)

Alkalinity env

(mg/L as CaCO3)

Alkalinity RPD

(percentage)

392119120484901 SNI-003 09/07/2011 36.0 36.0 0.0

383403120272101 SNI-041 08/30/2012 23.2 23.1 0.4

395141120504901 SNQ-054 11/07/2012 72.0 72.2 0.3

Table 2–19. Quality-assurance data for chlorophyll and pheophytin, field replicates.

[Analyses completed at the U.S. Geological Survey National Water Quality Laboratory, Denver, Colorado. Abbreviations: Chl, chlorophyll a; 

env, environmental sample; ID, identification; mg/L, milligram per liter; Pheo, pheophytin a; rep, replicate; RPD, relative percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Chl rep 

(mg/L)

Chl env 

(mg/L)

Chl RPD 

(percentage)

Pheo rep 

(mg/L)

Pheo env 

(mg/L)

Pheo RPD 

(percentage)

09/07/2011 SNI-003 E0.11 E0.1 9.5 0.25 0.24 4.1

11/07/2012 SNQ-054 0.51 0.48 6.1 0.83 0.78 6.2

Table 2–20A. Quality-assurance data for surface-water sulfate, 

field blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.09 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

Sulfate

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 0.18

10/16/2012 SNQ-003 <MDL

Table 2–20B. Quality-assurance data for surface-water sulfate, 

field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.09 milligram per liter (mg/L). Abbreviations: env, environmental sample; 

ID, identification; mm/dd/yyyy, month/day/year; rep, replicate; RPD, relative 

percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Sulfate 

rep

(mg/L)

Sulfate

env

(mg/L)

Sulfate

RPD

(percentage)

09/07/2011 SNI-003 5.3 4.6 14.1

08/30/2012 SNI-041 1.3 1.4 7.4

11/07/2012 SNQ-054 4.8 4.8 0.0
104 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 2–21A. Quality-assurance data for surface-water chloride, 

field blanks.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.06 milligram per liter (mg/L). Abbreviations: ID, identification; mm/dd/

yyyy, month/day/year; <, less than]

Date

(mm/dd/yyyy)

Project 

ID

Chloride 

(mg/L)

09/08/2011 SNI-004 <MDL

09/21/2011 SNI-010 <MDL

11/03/2011 SNI-015 <MDL

09/20/2012 SNQ-002 <MDL

10/16/2012 SNQ-003 <MDL

Table 2–21B. Quality-assurance data for surface-water chloride, 

field replicates.

[Analyses completed at the U.S. Geological Survey National Water 

Quality Laboratory, Denver, Colorado. Method detection limit (MDL) is 

0.06 milligram per liter (mg/L). Abbreviations: env, environmental sample; 

ID, identification; mm/dd/yyyy, month/day/year; Rep, replicate; RPD, relative 

percent difference]

Date

(mm/dd/yyyy)

Project 

ID

Chloride 

rep

(mg/L)

Chloride 

env

(mg/L)

Chloride 

RPD

(percentage)

09/07/2011 SNI-003 0.97 1.0 3.6

08/30/2012 SNI-041 0.47 0.52 11.2

11/07/2012 SNQ-054 1.6 1.7 5.8

Table 2–22A. Quality-assurance data for surface-water 

suspended sediment concentration, field blanks.

[Analyses completed at the U.S. Geological Survey Santa Cruz Sediment 

Laboratory. Abbreviations: ID, identification; mg/L, milligram per 

liter; mm, millimeter; mm/dd/yyyy, month/day/year; na, not applicable; 

SSC, suspended sediment concentration; <, less than]

Project 

ID

Date

(mm/dd/yyyy)

SSC 

(mg/L)

Percentage 

<0.063 mm

SNI-010 09/21/2011 <0.5 na

SNQ-001 08/30/2012 1.0 100

SNQ-002 09/20/2012 <0.5 na
Appendix 2. Quality-Assurance Data for Surface Water 105

Table 2–22B. Quality-assurance data for surface-water suspended sediment concentration (SSC), field replicates.

[Analyses completed at the U.S. Geological Survey Santa Cruz Sediment Laboratory. Abbreviations: env, environmental sample; ID, identification; 

mg/L, milligram per liter; mm, millimeter; mm/dd/yyyy, month/day/year; rep, replicate; RPD, relative percent difference; <, less than]

Station 

ID

Project 

ID

Date

(mm/dd/yyyy)

SSC rep 

(mg/L)

SSC env 

(mg/L)

SSC RPD 

(percentage)

Percentage 

<0.063 mm 

rep

Percentage 

<0.063 mm 

env

<0.063 mm

 RPD 

(percentage)

392119120484901 SNI-003 09/07/2011 <0.5 1 nd na 33 na

383403120272101 SNI-041 08/30/2012 1 2 67 89 80 11

395141120504901 SNQ-054 11/07/2012 1 2 67 100 74 30
Table 2–23A. The 2011 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes. [Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Al, aluminum; As, arsenic; B, boron; Ba, barium; Be, beryllium; BCd, cadmium; Ce, cerium; Co, cobalt; Cr, chromium; mg/L, milligram per liter; n, number; N, total number; nd, not determined; SRM, standard reference material; —, no data; <MDL, less than maximum detection limit] Al (μg/L) As (μg/L) B (μg/L) Ba (μg/L) Be (μg/L) Bi (μg/L) Ca (mg/L) Cd (μg/L) 

(μ

Method detection limit 0.042 0.0039 0.86 0.0037 0.0010 0.0031 0.0078 0.0006 0Equipment blanks (n) 3 3 3 3 3 3 3 3 3 Equipment blanks (mean concentration) <MDL <MDL <MDL 0.01 0.01 <MDL <MDL 0.0002 0Equipment blanks (median concentration) <MDL <MDL <MDL 0.01 0.01 <MDL <MDL <MDL <MReplicates (n) 1 1 1 1 1 1 1 1 1 Replicates (median relative percent difference) 1.6 1.8 5.1 2.3 10.1 31.2 0.4 15.0 2Standard reference (n) 39 51 81 51 51 12 78 51 16 Standard reference materials (median percent recovery) 94.5 97.8 100.0 99.9 98.4 98.7 101.1 99.6 101Matrix spikes (n) 0 2 0 0 2 0 2 2 0 Matrix spikes (median percent recovery) nd 97.7 nd nd 107.2 nd 101.6 111.9 

Average recovery for SRM N NBSD_10 (percentage) 12 87 91 — 103 93 99 — 97 

PPREE_100 (percentage) 8 — — — — — — — — 105 SCREE_100 (percentage) 8 — — — — — — — — 98 USGS T135 (percentage) 12 — 103 — 99 101 — — 100 USGS T173 (percentage) 112/16 100 99 100 99 99 — 101 100 USGS T175 (percentage) 212/8 96 100 97 101 102 — 102 103 USGS T187 (percentage) 14 — — 102 — — — 102 — USGS T195 (percentage) 16 — — 106 — — — 102 — USGS T197 (percentage) 16 — — 97 — — — 99 — USGS T159 (percentage) 8 — — 101 — — — 101 — 3Environment Canada PT97-TE06 (percentage) — 95 97 98 98 96 — — 98 

1N = 16 for boron and calcium; N = 12 for other elements. 2N = 8 for boron and calcium; N = 12 for other elements. 3The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–23B. The 2011 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes.[Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbium; Eu, europiumGd, gadolinium; Ho, holmium; K, potassium; La, lanthanum; mg/L, milligram per liter; n, number; N, total number; nd, not determined; SRM, standard reference material; —, nliter; <MDL, less than maximum detection limit]

Cs

(μg/L)

Cu

(μg/L)

Dy

(μg/L)

Er

(μg/L)

Eu

(μg/L)

Fe

(μg/L)

Ga

(μg/L)

Gd

(μg/L)

H

(μ

Method detection limit 0.0009 0.0078 0.0001 0.0001 0.00003 0.59 — 0.0001 0.Equipment blanks (n) 3 3 3 3 3 3 3 3 3 Equipment blanks (mean concentration) <MDL 0.03 <MDL <MDL <MDL <MDL <MDL <MDL 0.Equipment blanks (median concentration) <MDL 0.03 <MDL <MDL <MDL <MDL <MDL <MDL 0.Replicates (n) 1 1 1 1 1 1 1 1 1 Replicates (median relative percent difference) 0.0 4.4 8.5 3.0 15.1 4.9 7.7 3.1 6.Standard reference (n) 12 75 16 16 16 16 3 16 16 Standard reference materials (median percent recovery) nd 100.9 98.9 99.2 98.3 100.6 63.0 99.8 99.Matrix spikes (n) 0 2 0 0 0 0 0 0 0 Matrix spikes (median percent recovery) nd 109.1 nd nd nd nd nd nd n

Average recovery for SRM N

NBSD_10 (percentage) 0 — 103 — — — — — — — PPREE_100 (percentage) 8 — — 101 100 100 — — 100 103 SCREE_100 (percentage) 8 — — 97 98 96 — — 99 97 USGS T135 (percentage) 0 — 100 — — — — — — — USGS T173 (percentage) 24 — 99 — — — — — — — USGS T175 (percentage) 0 — 104 — — — — — — — USGS T187 (percentage) 0 — — — — — — — — — USGS T195 (percentage) 0 — — — — — — — — — USGS T197 (percentage) 0 — 100 — — — 101 — — — USGS T159 (percentage) 0 — — — — — — — — — 1Environment Canada PT97-TE06 (percentage) — — 99 — — — — 63 — — 

1The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–23C. The 2011 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes. [Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Li, lithium; Lu, lutetium; Mg, magnesium; mg/L, milligram per litMo, molybdenum; n, number; N, total number; Na, sodium; Nd, neodymium; nd, not determined; Ni, nickel; P, phosphorus; Pb, lead; SRM, standard reference material; μg/L, m<MDL, less than maximum detection limit] Li (μg/L) Lu (μg/L) Mg (mg/L) Mn (μg/L) Mo (μg/L) Na (mg/L) Nd (μg/L) Ni (μg/L

Method detection limit 0.0070 0.00003 0.0037 0.0021 0.0825 0.0025 0.0002 0.005Equipment blanks (n) 3 3 3 3 3 3 3 3 Equipment blanks (mean concentration) <MDL <MDL 0.06 0.08 <MDL <MDL 0.01 0.58 Equipment blanks (median concentration) <MDL <MDL 0.04 0.08 <MDL <MDL 0.02 0.58 Replicates (n) 1 1 1 1 1 1 1 1 Replicates (median relative percent difference) 24.8 1.6 1.1 17.4 0.7 6.5 0.8 29.5 Standard reference (n) 53 19 78 81 53 71 19 53 Standard reference materials (median percent recovery) 101.0 100.1 99.7 101.0 98.4 99.3 101.6 100.2 Matrix spikes (n) 0 0 2 2 0 2 0 0 Matrix spikes (median percent recovery) nd nd 100.9 103.9 nd 92.6 nd nd 

Average recovery for SRM N NBSD_10 (percentage) 12 104 — — — 100 — — 101 

PPREE_100 (percentage) 0 — 101 — — — — 103 — SCREE_100 (percentage) 0 — 99 — — — — 100 — USGS T135 (percentage) 12 100 — — — 100 — — 100 USGS T173 (percentage) 116/12 102 — 100 100 94 100 — 99 USGS T175 (percentage) 20/0 101 — 100 102 100 97 — 103 USGS T187 (percentage) 14 — — 101 102 — 100 — — USGS T195 (percentage) 16 — — 99 101 — 95 — — USGS T197 (percentage) 16 — — 99 100 — 101 — — USGS T159 (percentage) 8 — — 100 102 — 103 — — 3Environment Canada PT97-TE06 (percentage) — 98 — — 99 — — — 98 

1N = 16 for boron and calcium; N = 12 for other elements. 2N = 8 for boron and calcium; N = 12 for other elements. 3The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–23D. The 2011 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes.[Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: mg/L, milligram per liter; n, number; N, total number; nd, not deteRb, rubidium; Re, rhenium; S, sulfur; Sb, antimony; Se, selenium; Sm, samarium; Sn, tin; Sr, strontium; SRM, standard reference material; Tb, terbium; Te, tellurium; —, no da<MDL, less than maximum detection limit]

Pr

(μg/L)

Rb

(μg/L)

Re

(μg/L)

S

(mg/L)

Sb

(μg/L)

Se

(μg/L)

Sm

(μg/L)

Sn

(μg/L)

S

(μg

Method detection limit 0.00005 0.0029 0.0001 0.0631 0.0054 0.0559 0.0001 0.0273 0.Equipment blanks (n) 3 3 3 3 3 3 3 3 3 Equipment blanks (mean concentration) 0.003 <MDL 0.06 <MDL 0.06 0.31 <MDL <MDL <MEquipment blanks (median concentration) 0.003 <MDL 0.06 <MDL 0.06 0.34 <MDL <MDL <MReplicates (n) 1 1 1 1 1 1 1 1 1 Replicates (median relative percent difference) 7.8 8.2 6.0 18.3 150.4 0.7 13.6 0.0 0.Standard reference (n) 16 15 0 0 53 53 16 0 53 Standard reference materials (median percent recovery) nd 103.7 nd nd 97.1 99.8 nd nd 101.Matrix spikes (n) 0 0 0 0 0 0 0 0 0 Matrix spikes (median percent recovery) nd nd nd nd nd nd nd nd n

Average recovery for SRM N

NBSD_10 (percentage) 12 — 90 — — 98 86 — — 99 PPREE_100 (percentage) 8 103 — — — — — 103 — — SCREE_100 (percentage) 8 98 — — — — — 101 — — USGS T135 (percentage) 12 — — — — 100 102 — — 101 USGS T173 (percentage) 116/12 — — — — 97 84 — — 100 USGS T175 (percentage) 28/12 — — — — 101 93 — — 98 USGS T187 (percentage) 0 — — — — — — — — — USGS T195 (percentage) 0 — — — — — — — — — USGS T197 (percentage) 0 — — — — — — — — — USGS T159 (percentage) 0 — — — — — — — — — 3Environment Canada PT97-TE06 (percentage) — — 104 — — 97 100 — — 101 

1N = 16 for boron and calcium; N = 12 for other elements.2N = 8 for boron and calcium; N = 12 for other elements.3The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–23E. The 2011 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referencblanks, and matrix spikes. [Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: n, number; N, total number; nd, not determined; SRM, standard reTi, titanium; Tl, thallium; Tm, thulium; U, uranium; V, vanadium; W, tungsten; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/L, microgram per liter; —, no data; <MDLlimit] Th (μg/L) Ti (μg/L) Tl (μg/L) Tm (μg/L) U (μg/L) V (μg/L) W(μg/L) Y (μg/L) Y

(μg

Method detection limit 0.0001 0.31 0.0004 0.00002 0.0003 0.0029 0.0025 0.0001 0Equipment blanks (n) 3 3 3 3 3 3 3 3 3 Equipment blanks (mean concentration) <MDL 0.31 <MDL <MDL 0.0004 <MDL <MDL <MDL <MEquipment blanks (median concentration) <MDL 0.31 <MDL <MDL <MDL <MDL <MDL <MDL <MReplicates (n) 1 1 1 1 1 1 1 1 1 Replicates (median relative percent difference) 118.0 0.0 4.3 8.5 4.2 1.3 3.5 0.2 2Standard reference (n) 0 3 39 16 24 48 0 0 16 Standard reference materials (median percent recovery) nd 83.4 102.3 101.5 99.0 97.9 nd nd 102Matrix spikes (n) 0 0 0 0 0 0 0 0 0 Matrix spikes (median percent recovery) nd nd nd nd nd nd nd nd n

Average recovery for SRM N NBSD_10 (percentage) 12 — — 107 — — 95 — — — 

PPREE_100 (percentage) 8 — — — 102 — — — — 104 SCREE_100 (percentage) 8 — — — 101 — — — — 100 USGS T135 (percentage) 12 — — — — — 100 — — — USGS T173 (percentage) 12 — — 100 — 99 99 — — — USGS T175 (percentage) 12 — — 102 — 100 97 — — — USGS T187 (percentage) 0 — — — — — — — — — USGS T195 (percentage) 0 — — — — — — — — — USGS T197 (percentage) 0 — — — — — — — — — USGS T159 (percentage) 0 — — — — — — — — — 1Environment Canada PT97-TE06 (percentage) — — 83 101 — 98 — nd — — 

1The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–24A. The 2012 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes.[Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Al, aluminum; As, arsenic; B, boron; Ba, barium; Be, beryllium; BCd, cadmium; Ce, cerium; Co, cobalt; Cr, chromium; mg/L, milligram per liter; n, number; N, total number; nd, not determined; SRM, standard reference material; —, no data; <MDL, less than maximum detection limit]

Al

(μg/L)

As

(μg/L)

B 

(μg/L)

Ba

(μg/L)

Be

(μg/L)

Bi

(μg/L)

Ca

(mg/L)

Cd

(μg/L)

(μ

Method detection limit 0.52 0.013 0.32 0.0044 0.0021 0.0012 0.0033 0.0002 0Equipment blanks (n) 2 2 2 2 2 2 2 2 2 Equipment blanks (median concentration) <MDL <MDL <MDL 0.06 0.0025 <MDL <MDL <MDL <MReplicates (n) 2 2 2 2 2 2 2 2 2 Replicates (median relative percent difference) 11.8 47.7 15.6 8.8 0.0 155.0 0.8 45.8 15Standard reference (n) 39 39 81 39 39 12 81 39 16 Standard reference materials (median percent recovery) 103.2 97.5 103.8 99.7 97.9 99.3 100.2 97.4 99Matrix spikes (n) 0 2 0 0 2 0 2 2 0 Matrix spikes (median percent recovery) nd 87.9 nd nd 102.1 nd 102.7 100.0 

Average recovery for SRM N

NBSD_10 (percentage) 12 108 92 — 101 96 99 — 91 PPREE_100 (percentage) 8 — — — — — — — — 99 SCREE_100 (percentage) 8 — — — — — — — — 100 USGS T135 (percentage) 12 — 102 — 99 100 — — 100 USGS T173 (percentage) 112/16 106 101 100 101 101 — 100 101 USGS T175 (percentage) 212/8 105 101 99 102 103 — 99 103 USGS T187 (percentage) 14 — — 101 — — — 100 — USGS T195 (percentage) 16 — — 117 — — — 101 — USGS T197 (percentage) 16 — — 106 — — — 100 — USGS T159 (percentage) 8 — — 106 — — — 101 — 3Environment Canada PT97-TE06 (percentage) — 94 91 98 96 90 — — 93 

1N = 16 for boron and calcium; N = 12 for other elements.2N = 8 for boron and calcium; N = 12 for other elements.3The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–24B. The 2012 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes. [Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbium; Eu, europiumGd, gadolinium; Ho, holmium; K, potassium; La, lanthanum; mg/L, milligram per liter; n, number; N, total number; nd, not determined; SRM, standard reference material; —, nliter; <MDL, less than maximum detection limit] Cs (μg/L) Cu (μg/L) Dy (μg/L) Er (μg/L) Eu (μg/L) Fe (μg/L) Ga (μg/L) Gd (μg/L) H

(μg

Method detection limit 0.0009 0.0091 0.0005 0.0003 0.0001 1.0000 — 0.0001 0.0Equipment blanks (n) 2 2 2 2 2 2 2 2 2 Equipment blanks (median concentration) <MDL 0.04 <MDL <MDL <MDL 4.25 0.00002 <MDL 0.0Replicates (n) 2 2 2 2 2 2 2 2 2 Replicates (median relative percent difference) 3.6 9.7 19.6 11.4 333.5 7.7 3.2 33.3 1.1 Standard reference (n) 0 59 16 16 16 13 3 16 16 Standard reference materials (median percent recovery) nd 99.9 99.8 103.1 100.5 100.3 85.0 100.5 100.0 Matrix spikes (n) 2 2 0 0 0 0 0 0 0 Matrix spikes (median percent recovery) 96.2 96.2 nd nd nd nd nd nd n

Average recovery for SRM N NBSD_10 (percentage) 12 — 103 — — — — — — — 

PPREE_100 (percentage) 8 — — 100 99 100 — — 99 99 SCREE_100 (percentage) 8 — — 100 107 101 — — 102 101 USGS T135 (percentage) 12 — 100 — — — — — — — USGS T173 (percentage) 24 — 100 — — — — — — — USGS T175 (percentage) 12 — 102 — — — — — — — USGS T187 (percentage) 14 — — — — — — — — — USGS T195 (percentage) 16 — — — — — — — — — USGS T197 (percentage) 16 — — — — — 100 — — — USGS T159 (percentage) 8 — — — — — — — — — 1Environment Canada PT97-TE06 (percentage) 3 — 94 — — — — 85 — — 

1The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–24C. The 2012 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes.[Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Li, lithium; Lu, lutetium; Mg, magnesium; mg/L, milligram per litMo, molybdenum; n, number; N, total number; Na, sodium; Nd, neodymium; nd, not determined; Ni, nickel; P, phosphorus; Pb, lead; SRM, standard reference material; μg/L, m<MDL, less than maximum detection limit]

Li

(μg/L)

Lu

(μg/L)

Mg

(mg/L)

Mn

(μg/L)

Mo

(μg/L)

Na

(mg/L)

Nd

(μg/L)

Ni

(μg/L

Method detection limit 0.0166 0.0001 0.0007 0.0060 0.0437 0.0157 0.0003 0.00Equipment blanks (n) 2 2 2 2 2 2 2 2 Equipment blanks (median concentration) <MDL 0.001 0.12 0.06 <MDL <MDL 0.34 0.6Replicates (n) 2 2 2 2 2 2 2 2 Replicates (median relative percent difference) 6.2 2.8 6.8 6.2 0.6 2.2 76.8 6.9 Standard reference (n) 51 16 144 147 48 144 16 51 Standard reference materials (median percent recovery) 97.9 98.7 98.9 100.0 101.1 101.2 100.2 99.8 Matrix spikes (n) 0 0 2 2 0 2 0 0 Matrix spikes (median percent recovery) nd nd 100.5 102.1 nd 97.2 nd nd 

Average recovery for SRM N

NBSD_10 (percentage) 12 105 — — — 100 — — 101 PPREE_100 (percentage) 8 — 100 — — — — 99 — SCREE_100 (percentage) 8 — 98 — — — — 102 — USGS T135 (percentage) 12 91 — — — 100 — — 100 USGS T173 (percentage) 12 102 — 99 99 98 100 — 99 USGS T175 (percentage) 12 100 — 98 100 106 98 — 104 USGS T187 (percentage) 14 — — 98 99 — 101 — — USGS T195 (percentage) 16 — — 98 100 — 99 — — USGS T197 (percentage) 16 — — 100 100 — 102 — — USGS T159 (percentage) 8 — — 100 102 — 108 — — 1Environment Canada PT97-TE06 (percentage) — 91 — — 99 — — — 94 

1The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–24D. The 2012 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referenblanks, and matrix spikes. [Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: mg/L, milligram per liter; n, number; N, total number; nd, not deteRb, rubidium; Re, rhenium; S, sulfur; Sb, antimony; Se, selenium; Sm, samarium; Sn, tin; Sr, strontium; SRM, standard reference material; Tb, terbium; Te, tellurium; —, no da<MDL, less than maximum detection limit] Pr (μg/L) Rb (μg/L) Re (μg/L) S (mg/L) Sb (μg/L) Se (μg/L) Sm (μg/L) Sn (μg/L) S

(μ

Method detection limit 0.0001 0.0035 0.0001 0.0575 0.0363 0.0552 0.0006 0.0402 0Equipment blanks (n) 2 2 2 2 2 2 2 2 2 Equipment blanks (median concentration) 0.0013 <MDL 0.06 0.01 0.06 0.28 <MDL 0.03 0Replicates (n) 2 2 2 2 2 2 2 2 2 Replicates (median relative percent difference) 1.8 13.0 6.1 0.0 0.0 0.2 11.1 0.0 0Standard reference (n) 16 15 0 0 51 51 16 0 51 Standard reference materials (median percent recovery) 99.3 81.1 nd nd 99.0 94.1 100.9 nd 99Matrix spikes (n) 0 0 0 0 0 0 0 0 0 Matrix spikes (median percent recovery) nd nd nd nd nd nd nd nd n

Average recovery for SRM N NBSD_10 (percentage) 12 — 81 — — 98 92 — — 98 

PPREE_100 (percentage) 8 99 — — — — — 98 — — SCREE_100 (percentage) 8 100 — — — — — 104 — — USGS T135 (percentage) 12 — — — — 100 105 — — 100 USGS T173 (percentage) 12 — — — — 98 81 — — 100 USGS T175 (percentage) 12 — — — — 107 94 — — 98 USGS T187 (percentage) 0 — — — — — — — — — USGS T195 (percentage) 0 — — — — — — — — — USGS T197 (percentage) 0 — — — — — — — — — USGS T159 (percentage) 0 — — — — — — — — — 1Environment Canada PT97-TE06 (percentage) — — — — — 92 97 — — 103 

1The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
Table 2–24E. The 2012 quality-assurance data for selected cations and trace elements in surface water, surface-water replicates, standard referencblanks, and matrix spikes.[Analyses completed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: n, number; N, total number; nd, not determined; SRM, standard reTi, titanium; Tl, thallium; Tm, thulium; U, uranium; V, vanadium; W, tungsten; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/L, microgram per liter; —, no data; <MDLlimit]

Th

(μg/L)

Ti

(μg/L)

Tl

(μg/L)

Tm

(μg/L)

U

(μg/L)

V

(μg/L)

W

(μg/L)

Y

(μg/L)

Y

(μ

Method detection limit 0.0002 0.2855 0.0005 0.0001 0.0002 0.0228 0.0064 0.00008 0Equipment blanks (n) 2 2 2 2 2 2 2 2 2 Equipment blanks (median concentration) <MDL <MDL <MDL <MDL <MDL 0.0029 <MDL 0.00012 <MReplicates (n) 2 2 2 2 2 2 2 2 2 Replicates (median relative percent difference) 72.1 0.0 26.8 34.4 6.8 1.9 520.5 3.6 6Standard reference (n) 0 3 39 16 27 48 0 0 16 Standard reference materials (median percent recovery) nd 81.4 95.9 nd 94.5 nd nd nd nMatrix spikes (n) 0 0 0 0 0 0 0 0 0 Matrix spikes (median percent recovery) nd nd nd nd nd nd nd nd n

Average recovery for SRM N

NBSD_10 (percentage) 12 — — 104 — — 96 — — — PPREE_100 (percentage) 8 — — — 99 — — — — 99 SCREE_100 (percentage) 8 — — — 100 — — — — 105 USGS T135 (percentage) 12 — — — — — 100 — — — USGS T173 (percentage) 12 — — 100 — 100 100 — — — USGS T175 (percentage) 12 — — 100 — 100 98 — — — USGS T187 (percentage) 0 — — — — — — — — — USGS T195 (percentage) 0 — — — — — — — — — USGS T197 (percentage) 0 — — — — — — — — — USGS T159 (percentage) 0 — — — — — — — — — 1Environment Canada PT97-TE06 (percentage) — — 81 96 — 94 — nd — — 

1The SRM diluted by 10X then corrected for dilution; result is average of 3 analyses.
116 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

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Tracing dissolved organic matter in aquatic environments 

using a new approach to fluorescence spectroscopy: Marine 

Chemistry, v. 82, no. 3–4, p. 239–254, 

https://doi.org/10.1016/S0304-4203(03)00072-0.
Appendix 3. Quality-Assurance Data for Sediment 117

Appendix 3. Quality-Assurance Data for Sediment

Table 3–1A. Quality-assurance data for total mercury in sediment, standard reference material and matrix spike.

[All analyses performed at U.S. Geological Survey National Research Program, Western Branch. Method detection limit (MDL) = 0.07 nanogram per liter 

(ng/L). Abbreviations: mm, millimeter; mm/dd/yyyy, month/day/year; MS, matrix spike; nd, not determined; ng/L, nanogram per liter; SRM, standard reference 

material; <, less than]

Analytical 

batch number

Size 

fraction

Collection date start

(mm/dd/yyyy)

Collection date end

(mm/dd/yyyy)

Analytical 

blank

(ng/L)

SRM percent 

recovery

MS percent 

recovery

sHgT20120307 <2 mm 09/07/2011 11/02/2011 nd nd 110.4

sHgT20120307 <2 mm 09/07/2011 11/02/2011 <MDL 108.7 57.1

sHgT20120816 <0.063 mm 09/07/2011 11/02/2011 1.33 97.8 102.1

sHgT20130402 <2 mm 08/30/2012 11/15/2012 0.80 127.9 95.3

sHgT20130402 <2 mm 08/30/2012 11/15/2012 1.42 92.7 96.8

sHgT20130328 <0.063 mm 08/30/2012 11/15/2012 <MDL 92.7 101.8

sHgT20130328 <0.063 mm 08/30/2012 11/15/2012 1.04 101.0 103.6

Table 3–1B. Quality-assurance data for total mercury in sediment, 

lab duplicates.

[All analyses performed at U.S. Geological Survey National Research Program, 

Western Branch. Method detection limit (MDL) = 0.5 nanogram per liter 

(ng/L). Abbreviations: AVG, average; DEV, half of absolute relative difference; 

dup, duplicate; env, environmental; mm, millimeter; ng/g, nanogram per gram; 

%DEV, DEV expressed as a percentage of AVG; <, less than]

Analytical 

batch number

Project 

ID

Size 

fraction

AVG

env

(ng/g)

DEV

dup

(ng/g)

%DEV

sHgT20120307 SNS-007 <2 mm 46.8 24.4 52.1

sHgT20120307 SNS-012 <2 mm 8.94 0.09 1.0

sHgT20120816 SNS-005 <0.063 mm 39.6 1.87 4.7

sHgT20130328 SNS-045 <2 mm 48.9 1.07 2.2

sHgT20130328 SNS-055 <2 mm 67.5 1.11 1.7

sHgT20130328 SNS-045 <0.063 mm 48.9 1.07 2.2

sHgT20130328 SNS-055 <0.063 mm 67.5 1.11 1.7
118 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 3–2A. Quality-assurance data for methylmercury in sediment, standard reference materials and matrix spikes.

[All analyses performed at U.S. Geological Survey National Research Program, Western Branch. Method detection limit (MDL) = 0.07 nanogram per liter 

(ng/L). Abbreviations: mm, millimeter; mm/dd/yyyy, month/day/year; MS, matrix spike; MSD, matrix spike duplicate; nd, not determined; RPD, relative 

percent difference; SRM, standard reference material; <, less than]

Analytical 

batch number

Size 

fraction

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

Analytical 

blank

(ng/L)

SRM 

percent 

recovery

MS 

percent 

recovery

MSD 

percent 

recovery

MSD 

RPD 

(percentage)

SMeHg20120314 nd 09/07/2011 11/02/2011 <MDL 108.8 nd nd nd

SMeHg20120314 nd 09/07/2011 11/02/2011 <MDL 118.2 nd nd nd

SMeHg20130312 <2 mm 08/30/2012 11/15/2012 <MDL nd 103.4 108.2 4.5

SMeHg20130312 nd 08/30/2012 11/15/2012 <MDL nd nd nd nd

sMeHg20130318 <2 mm 08/30/2012 11/15/2012 <MDL nd 101.7 105.3 3.5

sMeHg20130318 nd 08/30/2012 11/15/2012 <MDL nd nd nd nd

Table 3–2B. Quality-assurance data for methylmercury in 

sediment, lab duplicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.5 nanogram 

per liter (ng/L). Abbreviations: AVG, average; DEV, half of absolute 

relative difference; dup, duplicate; env, environmental; ID, identification; 

mm, millimeter; ng/g, nanogram per gram; %DEV, DEV expressed as a 

percentage of AVG; <, less than]

Analytical 

batch number

Project 

ID

Size 

fraction

AVG

env

(ng/g)

DEV

dup

(ng/g)

%DEV

SMeHg20130312 SNS-042 <2 mm 0.41 0.01 2.03

SMeHg20130312 SNS-054 <2 mm 0.33 0.03 8.47
Appendix 3. Quality-Assurance Data for Sediment 119

Table 3–3A. Quality-assurance data for reactive mercury in 

sediment, analytical blank.

[All analyses completed at U.S. Geological Survey National Research 

Program, Western Branch. Abbreviations: DDL, daily detection limit; mm/

dd/yyyy, month/day/year; ng, nanogram; <, less than]

Analytical 

batch number

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

Analytical 

blank 

(ng)

sHgR20120412 09/07/2011 11/02/2011 0.01

sHgR20120412 09/07/2011 11/02/2011 0.01

sHgR20120412 09/07/2011 11/02/2011 0.02

sHgR20120412 09/07/2011 11/02/2011 0.01

sHgR20130219 08/30/2012 11/15/2012 <DDL

sHgR20130219 08/30/2012 11/15/2012 0.03

sHgR20130219 08/30/2012 11/15/2012 <DDL

sHgR20130219 08/30/2012 11/15/2012 <DDL

Table 3–3B. Quality-assurance data for reactive mercury in 

sediment, lab duplicates.

[All analyses completed at U.S. Geological Survey National Research 

Program, Western Branch. Abbreviations: AVG, average; DDL, daily 

detection limit; DEV, half of absolute difference; ID, identification; 

mm, millimeter; ng/g, nanogram per gram; %DEV, DEV expressed as a 

percentage of AVG; mm, millimeter; nd, not determined; <, less than]

Batch 

code

Sample 

ID Fraction AVG(ng/g)

DEV

(ng/g) %DEV

sHgR20120412 SNS-002 <2 mm 0.28 0.10 35.4

sHgR20120412 SNS-003 <2 mm 1.78 1.47 82.5

sHgR20120412 SNS-007 <2 mm 0.22 0.02 9.4

sHgR20120412 SNS-011 <2 mm <DDL nd nd

sHgR20130219 SNS-040 <2 mm 0.04 0.00 10.9

sHgR20130219 SNS-049 <2 mm 0.12 0.01 10.2

Table 3–4A. Quality-assurance data for ferrous iron in sediment, 

matrix spike.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.01 milligram 

per milliliter (mg/mL). Abbreviations: AB, analytical blank; mm, millimeter; 

mm/dd/yyyy, month/day/year; MS, matrix spike; nd, not determined; 

μg/mL, microgram per milliliter; <, less than]

Analytical 

batch number Size fraction

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

AB

(μg/

mL)

MS 

percent 

recovery

sFe20120524 <2 mm 09/07/2011 11/02/2011 nd 106.3

sFe20120524 <2 mm 09/07/2011 11/02/2011 0.26 100.1

sFe20120829 <0.063 mm 09/07/2011 11/02/2011 0.24 91.5

sFe20130327 <0.063 mm 08/30/2012 11/15/2012 0.28 93.7

sFe20130325 <2 mm 08/30/2012 11/15/2012 0.04 94.3

Table 3–4B. Quality-assurance data for ferrous iron in sediment, 

lab duplicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.01 microgram 

per milliliter (μg/mL). Abbreviations: AVG, average; DEV, half of absolute 

difference; ID, identification; mm, millimeter; μg/mL, microgram per 

milliliter; %DEV, DEV expressed as a percentage of AVG; <, less than]

Batch 

code

Sample 

ID Fraction AVG(μg/mL)

DEV

(μg/mL) %DEV

sFe20120524 SNS-009 <2 mm 1.49 0.07 4.4

sFe20120829 SNS-011 <0.063 mm 0.45 0.02 4.1

sFe20130327 SNS-057 <0.063 mm 0.55 0.04 7.3

sFe20130325 SNS-044 <2 mm 0.09 0.01 13.1
120 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 3–5A. Quality-assurance data for crystalline ferric iron in 

sediment, matrix blank and matrix spike.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.01 microgram 

per milliliter (μg/mL). Abbreviations: MB, matrix blank; mm, millimeter; 

mm/dd/yyyy, month/day/year; MS, matrix spike; nd, not determined; 

μg/mL, microgram per milliliter; <, less than]

Analytical 

batch 

number

Size 

fraction

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

MB 

(μg/

mL) 

MS 

percent 

recovery

sFe20120524 <2 mm 09/07/2011 11/02/2011 nd 130.0

sFe20120524 <2 mm 09/07/2011 11/02/2011 <MDL 99.5

sFe20120829 <0.063 mm 09/07/2011 11/02/2011 <MDL 86.0

sFe20130327 <0.063 mm 08/30/2012 11/15/2012 <MDL 99.0

sFe20130325 <2 mm 08/30/2012 11/15/2012 5.42 95.1

Table 3–5B. Quality-assurance data for crystalline ferric iron in 

sediment, lab duplicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.01 milligram 

per milliliter (mg/mL). Abbreviations: AVG, average; DEV, half of absolute 

difference; ID, identification; mm, millimeter; μg/mL, microgram per 

milliliter; %DEV, DEV expressed as a percentage of AVG; <, less than]

Batch code Sample ID Fraction AVG

(μg/mL)

DEV

(μg/mL) %DEV

sFe20120524 SNS-009 <2 mm 5.31 0.41 7.7

sFe20120829 SNS-11 <0.063 mm 12.44 1.23 9.9

sFe20130327 SNS-057 <0.063 mm 16.97 0.14 0.8

sFe20130325 SNS-044 <2 mm 7.92 1.20 15.1

sTRS20130521 SNS-043 <2 mm 3.63 1.05 29.0

Table 3–6A. Quality-assurance data for amorphous ferric iron in 

sediment, matrix blank and matrix spike.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.01 microgram 

per milliliter (μg/mL). Abbreviations: MB, matrix blank; mm, millimeter; 

mm/dd/yyyy, month/day/year; MS, matrix spike; μg/mL, microgram per 

milliliter; <, less than]

Analytical 

batch number

Size 

fraction

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

MB 

(μg/

mL) 

MS 

percent 

recovery

sFe20120524 <2 mm 09/07/2011 11/02/2011 0.48 130.0

sFe20120829 <0.063 mm 09/07/2011 11/02/2011 0.43 99.5

sFe20130327 <0.063 mm 08/30/2012 11/15/2012 0.51 86.0

sFe20130325 <2 mm 08/30/2012 11/15/2012 0.72 99.0

Table 3–6B. Quality-assurance data for amorphous ferric iron in 

sediment, lab duplicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.01 milligram 

per milliliter (mg/mL). Abbreviations: AVG, average; DEV, half of absolute 

difference; ID, identification; mm, millimeter; μg/mL, microgram per 

milliliter; %DEV, DEV expressed as a percentage of AVG; <, less than]

Batch code Sample ID Fraction AVG

(μg/mL)

DEV

(μg/mL) %DEV

sFe20120524 SNS-009 <2 mm 0.20 0.03 14.2

sFe20120829 SNS-11 <0.063 mm 1.03 0.10 9.6

sFe20130327 SNS-057 <0.063 mm 1.43 0.12 8.4

sFe20130325 SNS-044 <2 mm 0.20 0.01 3.1
Appendix 3. Quality-Assurance Data for Sediment 121

Table 3–7A. Quality-assurance data for total reduced sulfur in 

sediment, analytical blank and matrix spike.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.01 micromole 

per milliliter (μmol/mL). Abbreviations: AB, analytical blank; 

mm, millimeter; mm/dd/yyyy, month/day/year; MS, matrix spike; nd, not 

determined; μmol/mL, micromol per milliliter; —, no data; <, less than]

Analytical 

batch number

Size 

fraction

Collection 

date start

(mm/dd/yyyy)

Collection 

date end

(mm/dd/yyyy)

AB 

(μmol/

mL)

MS 

percent 

recovery

sTRS20130613 <0.063 mm 09/07/2011 11/2/2011 0.06 100.7

sTRS20130614 — 09/07/2011 11/02/2011 0.06 nd

sTRS20130522 <0.063 mm 08/30/2012 11/15/2012 nd 118.4

Table 3–7B. Quality-assurance data for total reduced sulfur in 

sediment, lab duplicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Method detection limit (MDL) = 0.2 micromole of 

sulfide per wet gram of sediment. Abbreviations: AVG, average; DEV, half of 

absolute difference; ID, identification; mm, millimeter; μmol/g, micromole per 

gram; %DEV, DEV expressed as a percentage of AVG; <, less than]

Batch code Sample ID Fraction AVG

(μmol/g)

DEV

(μmol/g) %DEV

sTRS20120703 SNS-002 <2 mm 1.27 0.66 52.2

sTRS20130613 SNS-003 <0.063 mm 8.26 0.10 1.2

sTRS20130517 SNS-050 <0.063 mm 2.95 0.37 12.6

sTRS20130614 SNS-057 <0.063 mm 0.95 0.08 8.5

sTRS20130517 SNS-040 <0.063 mm 2.27 0.05 2.3

Table 3–8. Quality-assurance data for loss on ignition in 

sediment, lab duplicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Abbreviations: AVG, average; DEV, half of 

absolute difference; ID, identification; mm, millimeter; %DEV, DEV 

expressed as a percentage of AVG; %d.w., percentage of dry weight]

Batch code Sample ID Fraction AVG

(%d.w.)

DEV

(%d.w.) %DEV

sLOI20120125 SNS-001 <2 mm 0.70 0.02 3.0

sLOI20120125 SNS-002 <2 mm 0.71 0.06 8.4

sLOI20120125 SNS-003 <2 mm 0.87 0.02 2.0

sLOI20120125 SNS-005 <2 mm 1.73 0.06 3.2

sLOI20120125 SNS-006 <2 mm 1.94 0.02 0.8

sLOI20120125 SNS-007 <2 mm 1.96 0.05 2.4

sLOI20120125 SNS-009 <2 mm 1.62 0.02 1.3

sLOI20120125 SNS-011 <2 mm 0.95 0.03 3.2

sLOI20120125 SNS-013 <2 mm 0.66 0.00 0.1

sLOI20120125 SNS-012 <2 mm 1.99 0.07 3.3

sLOI20130311 SNS-047 <2 mm 0.83 0.07 8.5

sLOI20130311 SNS-057 <2 mm 0.96 0.02 1.9

sLOI20120831 SNS-003 <0.063 mm 7.10 0.03 0.4

sLOI20120831 SNS-005 <0.063 mm 14.00 0.33 2.3

sLOI20120831 SNS-007 <0.063 mm 6.62 0.06 0.9

sLOI20120831 SNS-011 <0.063 mm 11.37 0.41 3.6

sLOI20130319 SNS-042 <0.063 mm 11.19 0.10 0.9

sLOI20130319 SNS-057 <0.063 mm 5.36 0.17 3.2
122 Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12

Table 3–9. Quality-assurance data for percent dry weight.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Abbreviations: AVG, average; DEV, half of 

absolute difference; ID, identification; mm, millimeter; %DEV, DEV 

expressed as a percentage of AVG; %w.w., percentage of wet weight]

Batch code Sample ID Fraction AVG

(%w.w.)

DEV

(%w.w.) %DEV

sDW20120125 SNS-001 <2 mm 73.37 2.36 3.2

sDW20120125 SNS-002 <2 mm 77.17 0.89 1.6

sDW20120125 SNS-003 <2 mm 74.20 0.23 0.3

sDW20120125 SNS-005 <2 mm 70.64 0.42 0.6

sDW20120125 SNS-006 <2 mm 72.72 0.13 0.2

sDW20120125 SNS-007 <2 mm 72.06 0.27 0.4

sDW20120125 SNS-009 <2 mm 70.30 1.06 1.5

sDW20120125 SNS-011 <2 mm 73.47 1.00 1.4

sDW20120125 SNS-013 <2 mm 72.38 0.49 0.7

sDW20120125 SNS-012 <2 mm 67.34 1.19 1.8

sDW20130311 SNS-047 <2 mm 75.36 0.56 0.8

sDW20130311 SNS-057 <2 mm 76.05 0.24 0.3

sDW20120831 SNS-003 <0.063 mm 48.84 0.68 1.4

sDW20120831 SNS-005 <0.063 mm 48.71 0.32 0.7

sDW20120831 SNS-007 <0.063 mm 57.92 0.03 0.1

sDW20120831 SNS-011 <0.063 mm 53.02 0.06 0.1

sDW20130319 SNS-042 <0.063 mm 52.93 0.30 0.6

sDW20130319 SNS-057 <0.063 mm 54.80 0.41 0.8

Table 3–10. Quality-assurance data for bulk density.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Abbreviations: AVG, average; DEV, half of 

absolute difference; g/cm3, gram per cubic centimeter; ID, identification; 

mm, millimeter; %DEV, DEV expressed as a percentage of AVG]

Batch code Sample ID Fraction AVG

(g/cm3)

DEV

(g/cm3) %DEV

sBD20120125 SNS-001 <2 mm 1.84 0.05 2.7

sBD20120125 SNS-002 <2 mm 1.92 0.02 1.2

sBD20120125 SNS-003 <2 mm 1.89 0.02 1.1

sBD20120125 SNS-005 <2 mm 1.81 0.01 0.8

sBD20120125 SNS-006 <2 mm 1.80 0.00 0.2

sBD20120125 SNS-007 <2 mm 1.81 0.01 0.8

sBD20120125 SNS-009 <2 mm 1.76 0.01 0.8

sBD20120125 SNS-011 <2 mm 1.81 0.04 2.0

sBD20120125 SNS-013 <2 mm 1.80 0.00 0.0

sBD20120125 SNS-012 <2 mm 1.68 0.02 1.4

sBD20130311 SNS-047 <2 mm 1.86 0.02 0.9

sBD20130311 SNS-057 <2 mm 1.87 0.04 2.0

sBD20120831 SNS-003 <0.063 mm 1.39 0.01 0.7

sBD20120831 SNS-005 <0.063 mm 1.30 0.00 0.1

sBD20120831 SNS-007 <0.063 mm 1.52 0.01 0.5

sBD20120831 SNS-011 <0.063 mm 1.34 0.01 0.5

sBD20130319 SNS-042 <0.063 mm 1.42 0.00 0.2

sBD20130319 SNS-057 <0.063 mm 1.45 0.01 0.5
Appendix 3. Quality-Assurance Data for Sediment 123

Table 3–11. Quality-assurance data for porosity.

[All analyses performed at U.S. Geological Survey National Research 

Program, Western Branch. Abbreviations: AVG, average; DEV, half of 

absolute difference; ID, identification; mL of PW/cm3, milliliter of pore water 

per cubic centimeter (wet weight); mm, millimeter; %DEV, DEV expressed as 

a percentage of AVG]

Batch code Sample ID Fraction

AVG

(mL of 

PW/cm3)

DEV

(mL of 

PW/cm3)

%DEV

sPOR20120125 SNS-001 <2 mm 0.49 0.03 6.2

sPOR20120125 SNS-002 <2 mm 0.44 0.01 2.7

sPOR20120125 SNS-003 <2 mm 0.49 0.00 0.2

sPOR20120125 SNS-005 <2 mm 0.53 0.00 0.6

sPOR20120125 SNS-006 <2 mm 0.49 0.00 0.7

sPOR20120125 SNS-007 <2 mm 0.51 0.00 0.2

sPOR20120125 SNS-009 <2 mm 0.52 0.01 2.8

sPOR20120125 SNS-011 <2 mm 0.48 0.01 1.8

sPOR20120125 SNS-013 <2 mm 0.50 0.01 1.8

sPOR20120125 SNS-012 <2 mm 0.55 0.01 2.3

sPOR20130311 SNS-047 <2 mm 0.46 0.01 1.4

sPOR20130311 SNS-057 <2 mm 0.45 0.00 1.0

sPOR20120831 SNS-003 <0.063 mm 0.71 0.00 0.7

sPOR20120831 SNS-005 <0.063 mm 0.67 0.00 0.7

sPOR20120831 SNS-007 <0.063 mm 0.64 0.00 0.6

sPOR20120831 SNS-011 <0.063 mm 0.63 0.00 0.4

sPOR20130319 SNS-042 <0.063 mm 0.67 0.00 0.4

sPOR20130319 SNS-057 <0.063 mm 0.66 0.00 0.5

Table 3–12. Quality-assurance data for less than 2 millimeters 

grain-size distribution determined by laser diffraction.

[D50, median grain size; ID, identification; RPD, relative percent difference]

Site ID D50 RPD

SNS-001 4.1

SNS-002 7.0

SNS-003 5.7

SNS-005 8.0

SNS-006 5.0

SNS-007 8.6

SNS-009 4.5

SNS-011 0.1

SNS-012 6.6

SNS-013 0.3

SNS-040 0.8

SNS-041 6.9

SNS-042 4.5

SNS-043 0.8

SNS-044 8.4

SNS-045 5.0

SNS-046 2.0

SNS-047 0.0

SNS-048 5.2

SNS-049 0.2

SNS-050 2.7

SNS-051 5.4

SNS-052 7.4

SNS-053 0.2

SNS-054 0.9

SNS-055 5.7

SNS-056 1.4

SNS-057 4.7

SNS-058 1.1
Table 3–13. Data for grain-size distribution in sediment determined by laser diffraction; phi classification. [All analyses completed at the U.S. Geological Survey California Water Science Center. The phi (φ) scale for sediment particles is defined as phi = – log(base 2) (d in millimeter 0 corresponds to 1 mm, a phi of 2 corresponds to 0.25 mm (1/4 mm), phi of 4 is 0.0625 mm (1/16 mm), and phi of 8 is approximately 0.004 mm (1/256 mm). Values in phi columsediment sample (by volume) in 1/2-phi size bin smaller than indicated phi size] SITE ID –1φ –0.5φ 0φ 0.5φ 1φ 1.5φ 2φ 2.5φ 3φ 3.5φ 4φ 4.5φ 5φ 5.5φ 6φ 6.5φ 7φ 7.5φ 8φ 8.5φ 9φ 

SNS-001 7.8 11.6 16.4 18.7 15.8 10.6 6.1 3.1 1.8 1.4 1.2 1.0 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.2 0.2 SNS-002 8.0 11.5 15.6 17.6 15.7 11.2 6.5 3.1 1.6 1.1 1.0 1.0 1.0 0.9 0.9 0.8 0.6 0.5 0.4 0.3 0.2 SNS-003 8.0 14.8 21.0 19.5 13.0 6.8 3.8 1.6 0.9 0.8 0.9 1.0 1.1 1.1 1.1 1.1 0.9 0.7 0.5 0.3 0.3 SNS-005 11.3 12.9 13.1 11.0 7.1 4.6 4.7 4.2 3.7 3.6 3.3 2.8 2.6 2.3 2.0 2.0 1.8 1.6 1.2 1.0 0.9 SNS-006 2.6 6.3 12.1 16.8 16.1 11.8 8.2 5.5 4.0 3.4 2.7 2.1 1.8 1.5 1.2 1.0 0.8 0.6 0.4 0.3 0.3 SNS-007 1.8 4.7 9.2 12.6 13.2 13.2 12.5 9.0 5.3 3.4 2.4 2.0 1.8 1.7 1.6 1.4 1.1 0.9 0.6 0.5 0.4 SNS-009 0.4 3.6 10.2 16.5 18.1 15.8 12.0 7.3 4.1 2.6 1.9 1.4 1.2 1.0 0.8 0.7 0.6 0.5 0.4 0.3 0.2 

SNS-011 7.2 11.7 15.1 14.3 10.6 8.1 7.0 5.0 3.6 3.0 2.5 2.1 1.9 1.6 1.3 1.1 0.9 0.7 0.5 0.4 0.4 

SNS-012 0.3 3.6 9.2 14.3 15.6 14.0 11.5 7.9 5.4 4.2 3.3 2.6 2.0 1.5 1.2 0.9 0.7 0.5 0.3 0.3 0.2 SNS-013 0.1 3.0 11.1 19.8 22.6 18.7 12.2 5.8 2.4 1.2 0.8 0.5 0.4 0.3 0.2 0.2 0.1 0.1 0.1 0.1 0.1 SNS-040 11.1 14.8 17.8 15.6 10.0 6.7 5.8 4.4 3.1 2.4 1.9 1.4 1.1 0.8 0.7 0.5 0.4 0.3 0.3 0.2 0.2 SNS-041 13.6 18.3 20.0 15.7 9.1 5.2 4.0 2.8 2.0 1.7 1.4 1.1 1.0 0.8 0.6 0.5 0.5 0.4 0.3 0.2 0.2 SNS-042 1.8 6.7 14.2 19.3 17.8 12.8 8.0 4.2 2.4 2.1 1.9 1.6 1.5 1.2 1.0 0.8 0.6 0.5 0.4 0.3 0.3 SNS-043 7.3 7.8 11.5 14.1 13.6 10.9 8.2 5.3 3.4 2.7 2.3 1.9 1.7 1.5 1.3 1.2 1.1 0.9 0.7 0.6 0.5 SNS-044 21.1 18.8 15.1 7.8 4.1 2.7 2.9 2.8 2.5 2.7 3.0 2.7 2.5 2.1 1.8 1.6 1.3 1.1 0.8 0.6 0.5 SNS-045 4.0 8.5 14.3 16.9 15.0 11.9 8.7 5.1 3.0 2.3 1.8 1.5 1.3 1.1 0.9 0.8 0.7 0.5 0.4 0.3 0.3 SNS-046 5.4 9.3 14.5 17.3 15.5 11.9 8.4 5.0 3.1 2.2 1.7 1.3 1.0 0.7 0.6 0.5 0.4 0.3 0.2 0.2 0.2 SNS-047 3.6 12.2 22.7 23.6 14.3 6.9 3.9 2.2 1.6 1.4 1.3 1.0 0.9 0.8 0.6 0.6 0.5 0.4 0.3 0.2 0.2 SNS-048 1.6 12.0 24.8 25.5 15.3 7.3 4.0 2.1 1.3 1.0 0.9 0.8 0.7 0.5 0.4 0.4 0.3 0.3 0.2 0.1 0.1 SNS-049 14.3 17.8 19.0 14.3 7.6 4.3 3.9 3.1 2.5 2.2 1.8 1.6 1.4 1.1 1.0 0.9 0.8 0.6 0.5 0.4 0.3 SNS-050 14.4 13.9 16.1 13.3 8.9 5.4 4.6 3.6 3.1 2.6 2.2 1.7 1.5 1.3 1.2 1.2 1.0 0.8 0.5 0.4 0.3 SNS-051 2.3 2.2 3.8 5.3 4.4 5.2 8.8 10.1 10.9 11.3 9.8 7.4 5.3 3.7 2.6 1.9 1.3 0.9 0.6 0.5 0.5 SNS-052 8.0 10.1 10.4 8.4 5.6 4.5 5.0 4.3 3.7 4.0 4.4 4.5 4.8 4.5 4.1 3.5 2.8 2.0 1.4 1.0 0.8 SNS-053 0.1 2.6 10.9 20.9 24.7 18.9 10.4 3.9 1.6 0.9 0.8 0.7 0.7 0.6 0.5 0.5 0.4 0.3 0.2 0.1 0.1 SNS-054 0.1 2.8 8.4 14.2 16.5 15.8 14.0 10.2 6.2 3.6 2.2 1.4 1.0 0.7 0.6 0.5 0.4 0.3 0.2 0.2 0.2 SNS-055 6.7 9.2 12.4 12.7 9.7 7.5 7.3 6.5 5.6 5.0 4.2 3.2 2.4 1.8 1.4 1.1 0.8 0.6 0.4 0.3 0.3 SNS-056 6.4 16.3 22.9 20.1 12.5 6.5 4.0 2.2 1.4 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.5 0.4 0.3 0.2 0.2 SNS-057 8.7 13.0 16.9 16.8 12.4 8.1 5.8 3.5 2.0 1.5 1.3 1.3 1.4 1.4 1.4 1.2 1.0 0.7 0.4 0.3 0.2 SNS-058 8.5 14.6 21.7 20.2 11.8 5.9 3.8 2.4 1.7 1.5 1.3 1.2 1.1 0.9 0.8 0.6 0.5 0.4 0.3 0.2 0.2 
Table 3–14A. The 2011 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates.[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Al, aluminum; As, arsenic; B, boron; Ba, barium; Be, berylliumCd, cadmium; Ce, cerium; Co, cobalt; n, number; nd, not determined; Wt%, weight percent; μg/g, microgram per gram]

Al

(Wt%)

As

(μg/g)

B 

(μg/g)

Ba

(μg/g)

Be

(μg/g)

Bi

(μg/g)

Ca

(Wt%)

Cd

(μg/g

Standard reference (n) 9 9 3 9 3 3 9 7 Standard reference materials (median percent recovery) 92.7 90.4 102.9 94.6 89.4 102.0 98.2 103.3 Matrix spikes (n) nd 2 nd nd 2 nd nd 2 Matrix spikes (median percent recovery) nd 101.9 nd nd 104.9 nd nd 109.0 Digest replicates (n) 10 10 10 10 10 10 10 10 Digest replicates (relative percent difference) 4.9 3.7 6.6 2.9 3.9 15.0 1.9 4.7 

Table 3–14B. The 2011 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates.[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Cr, chromium; Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbGa, gallium; Gd, gadolinium; Ho, holmium; K, potassium; n, number; nd, not determined; Wt%, weight percent; μg/g, microgram per gram]

Cr

(μg/g)

Cs

(μg/g)

Cu

(μg/g)

Dy

(μg/g)

Er

(μg/g)

Eu

(μg/g)

Fe

(Wt%)

Ga

(μg/g)

G

(μg

Standard reference (n) 9 9 3 3 3 3 9 3 3 Standard reference materials (median percent recovery) 101.1 85.8 98.1 72.9 71.7 85.2 94.0 97.5 74Matrix spikes (n) nd nd nd nd nd nd nd nd nMatrix spikes (median percent recovery) nd nd nd nd nd nd nd nd nDigest replicates (n) 10 10 10 10 10 10 10 10 10 Digest replicates (relative percent difference) 7.6 3.9 2.4 5.7 7.0 3.6 3.3 1.4 3
Table 3–14C. The 2011 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates. [All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: La, lanthanum; Li, lithium; Lu, lutetium; Mg, magnesium; Mn, n, number; Na, sodium; Nd, neodymium; nd, not determined; Ni, nickel; P, phosphorus; Pb, lead; Wt%, weight percent; μg/g, microgram per gram] La (μg/g) Li (μg/g) Lu (μg/g) Mg (Wt%) Mn (μg/g) Mo (μg/g) Na (Wt%) Nd (μg/g) N

(μg

Standard reference (n) 3 3 3 6 6 3 6 3 Standard reference materials (median percent recovery) 86.0 100.5 74.0 95.8 102.2 108.9 92.3 93.0 10Matrix spikes (n) nd nd nd nd nd nd nd nd nMatrix spikes (median percent recovery) nd nd nd nd nd nd nd nd nDigest replicates (n) 10 10 10 10 10 10 10 10 1Digest replicates (relative percent difference) 4.2 1.8 5.0 2.1 0.7 9.8 2.6 4.5 

Table 3–14D. The 2011 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates. [All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: n, number; nd, not determined; Pr, praseodymium; Rb, rubidiumSb, antimony; Se, selenium; Sm, samarium; Sn, tin; Sr, strontium; Tb, terbium; Wt%, weight percent; μg/g, microgram per gram] Pr (μg/g) Rb (μg/g) Re (μg/g) S (Wt%) Sb (μg/g) Se (μg/g) Sm (μg/g) Sn (μg/g

Standard reference (n) 3 3 0 0 9 0 3 3 Standard reference materials (median percent recovery) 92.0 98.0 nd nd 111.1 nd 89.7 111.1 Matrix spikes (n) nd nd nd nd nd nd nd nd Matrix spikes (median percent recovery) nd nd nd nd nd nd nd nd Digest replicates (n) 10 10 4 nd 10 10 10 10 Digest replicates (relative percent difference) 4.4 4.0 36.5 nd 2.3 23.3 5.3 5.3 
Table 3–14E. The 2011 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard respikes, and digest replicates.[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: n, number; nd, not determined; Th, thorium; Ti, titanium; Tl, thV, vanadium; W, tungsten; Wt%, weight percent; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/g, microgram per gram]

Th

(μg/g)

Ti

(Wt%)

Tl

(μg/g)

Tm

(μg/g)

U 

(μg/g)

V 

(μg/g)

W 

(μg/g)

Y 

(μg/g)

Y

(μg

Standard reference (n) 9 9 3 3 9 9 3 3 9 

Standard reference materials (median percent recovery) 98.9 90.6 106.2 65.8 100.3 96.0 101.6 71.6 79Matrix spikes (n) nd nd nd nd nd nd nd nd nMatrix spikes (median percent recovery) nd nd nd nd nd nd nd nd nDigest replicates (n) 10 10 10 10 10 10 10 10 10 Digest replicates (relative percent difference) 3.9 0.7 2.1 8.2 2.6 3.0 4.6 5.4 7

Table 3–15A. The 2012 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates.[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Al, aluminum; As, arsenic; B, boron; Ba, barium; Be, berylliumCd, cadmium; Ce, cerium; Co, cobalt; n, number; nd, not determined; Wt%, weight percent; μg/g, microgram per gram]

Al

(Wt%)

As

(μg/g)

B 

(μg/g)

Ba

(μg/g)

Be

(μg/g)

Bi

(μg/g)

Ca

(Wt%)

Cd

(μg/g

Standard reference (n) 7 7 4 7 4 4 7 5 Standard reference materials (median percent recovery) 87.6 91.5 101.3 90.1 89.4 120.2 96.3 98.6 Matrix spikes (n) nd 3 nd nd 3 nd nd 3 Matrix spikes (median percent recovery) nd 80.6 nd nd 96.2 nd nd 102.5 Digest replicates (n) 12 9 12 12 9 12 12 9 Digest replicates (relative percent difference) 4.8 8.0 6.0 2.2 3.9 12.8 5.7 15.2 
Table 3–15B. The 2012 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates. [All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: Cr, chromium; Cs, cesium; Cu, copper; Dy, dysprosium; Er, erbGa, gallium; Gd, gadolinium; Ho, holmium; K, potassium; n, number; nd, not determined; Wt%, weight percent; μg/g, microgram per gram] Cr (μg/g) Cs (μg/g) Cu (μg/g) Dy (μg/g) Er (μg/g) Eu (μg/g) Fe (Wt%) Ga (μg/g) G

(μg

Standard reference (n) 7 7 4 4 4 4 7 4 4 Standard reference materials (median percent recovery) 100.3 84.5 101.6 77.5 77.0 87.9 101.7 97.3 78Matrix spikes (n) nd nd nd nd nd nd nd nd nMatrix spikes (median percent recovery) nd nd nd nd nd nd nd nd nDigest replicates (n) 12 12 9 12 10 12 12 12 12 Digest replicates (relative percent difference) 4.5 10.8 8.5 7.2 7.0 7.4 5.6 11.4 5

Table 3–15C. The 2012 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates. [All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: La, lanthanum; Li, lithium; Lu, lutetium; Mg, magnesium; Mn, n, number; Na, sodium; Nd, neodymium; nd, not determined; Ni, nickel; P, phosphorus; Pb, lead; Wt%, weight percent; μg/g, microgram per gram] La (μg/g) Li (μg/g) Lu (μg/g) Mg (Wt%) Mn (μg/g) Mo (μg/g) Na (Wt%) Nd (μg/g) N

(μg

Standard reference (n) 4 4 4 7 7 4 7 4 Standard reference materials (median percent recovery) 91.2 101.0 76.8 98.4 100.0 114.4 91.3 97.1 10Matrix spikes (n) nd nd nd nd nd nd nd nd nMatrix spikes (median percent recovery) nd nd nd nd nd nd nd nd nDigest replicates (n) 12 12 12 12 12 12 12 12 1Digest replicates (relative percent difference) 5.0 7.5 5.5 11.3 4.7 18.6 6.6 6.3 
Table 3–15D. The 2012 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard rspikes, and digest replicates.[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: n, number; na, not applicable; nd, not determined; Pr, praseodyRe, rhenium; S, sulfur; Sb, antimony; Se, selenium; Sm, samarium; Sn, tin; Sr, strontium; Tb, terbium; Wt%, weight percent; μg/g, microgram per gram]

Pr

(μg/g)

Rb

(μg/g)

Re

(μg/g)

S 

(Wt%)

Sb

(μg/g)

Se

(μg/g)

Sm

(μg/g)

Sn

(μg/g

Standard reference (n) 4 4 0 0 7 0 4 4 Standard reference materials (median percent recovery) 97.2 90.4 na na 117.2 na 95.6 104.2 Matrix spikes (n) nd nd nd nd nd nd nd nd Matrix spikes (median percent recovery) nd nd nd nd nd nd nd nd Digest replicates (n) 12 12 2 nd 12 9 12 12 Digest replicates (relative percent difference) 8.0 6.5 18.3 nd 13.8 30.8 6.4 20.5 

Table 3–15E. The 2012 quality-assurance data for trace elements and major elements in sediment less than 0.063 millimeters in diameter, standard respikes, and digest replicates.[All analyses performed at U.S. Geological Survey National Research Program, Central Branch. Abbreviations: n, number; nd, not determined; Th, thorium; Ti, titanium; Tl, thV, vanadium; W, tungsten; Wt%, weight percent; Y, yttrium; Yb, ytterbium; Zn, zinc; Zr, zirconium; μg/g, microgram per gram]

Th

(μg/g)

Ti

(Wt%)

Tl

(μg/g)

Tm

(μg/g)

U 

(μg/g)

V 

(μg/g)

W 

(μg/g)

Y 

(μg/g)

Y

(μg

Standard reference (n) 7 7 4 4 7 7 4 4 7 Standard reference materials (median percent recovery) 99.0 102.5 105.6 81.7 100.1 101.7 93.6 76.3 82Matrix spikes (n) nd nd nd nd nd nd nd nd nMatrix spikes (median percent recovery) nd nd nd nd nd nd nd nd nDigest replicates (n) 12 12 12 12 12 12 12 12 12 Digest replicates (relative percent difference) 4.8 5.6 3.7 4.8 9.3 4.8 11.4 4.1 4

Appendix 4. Quality-Assurance Data for Fish Tissue 131

Appendix 4. Quality-Assurance Data for Fish Tissue
Table 4–1A. Quality assurance and quality control for mercury concentration in fish tissue: laboratory blanks, certified reference materials, and converification. [All analyses performed at University of California, Davis. Abbreviations: CCV, continued calibration verification; CRM, certified reference material; dw, dry weight; LB, laboyyyy, month/day1/year; n, number; N, total number; ng/g, nanogram per gram; SD; standard deviation; —, not applicable; <, less than] Analytical batch Range of collection dates (mm/dd/yyyy) LB (n) LB (ng/g dw) (mean) LB SD CRM (n) CRM percent recovery (mean) CRM SD (percentage) CCV (n) CCV p

reco

(me

01SN11 08/11/2011–10/20/2011 9 <0.30 0.55 9 100.3 3.8 9 907SB11 10/20/2011 3 <0.20 0.09 3 98.9 2.7 3 901SN12 07/17/2012–07/23/2012 9 <0.30 0.52 9 105.1 2.3 9 902SN12 07/24/2012–08/22/2012 9 0.03 0.37 9 96.3 3.3 9 903SN12 10/02/2012–10/10/2012 9 <0.26 0.30 9 96.3 4.1 9 904SN12 10/15/2012–11/04/2012 9 0.24 0.30 9 98.5 1.5 9 905SN12 11/06/2012–11/13/2012 6 <0.05 0.47 6 100.0 1.4 6 9

Table 4–1B. Quality assurance and quality control for mercury concentration in fish tissue, laboratory calibration standards and matrix spikes. [All analyses performed at University of California, Davis. Abbreviations: LCS, laboratory calibration standard; mm/dd/yyyy, month/day/year; MS, matrix spike; MSD, matrix N, total number; na, not available; SD; standard deviation; —, not applicable] Analytical batch Range of collection dates (mm/dd/yyyy) LCS (n) LCS percent recovery (mean) LCS SD (percentage) MS (n) MS percent recovery (mean) MS SD (percentage) MSD (n) MSD perc

(m

01SN11 08/11/2011–10/20/2011 3 106.3 2.7 3 99.6 0.8 3 907SB11 10/20/2011 1 107.6 na 1 105.1 na 1 901SN12 7/17/2012–7/23/2012 3 106.4 2.6 3 99.4 1.8 3 902SN12 7/24/2012–08/22/2012 3 105.1 1.4 3 97.5 1.7 3 903SN12 10/02/2012–10/10/2012 3 104.5 1.8 3 96.3 1.6 3 904SN12 10/15/2012–11/04/2012 3 105.2 1.1 3 96.7 0.9 3 905SN12 11/06/2012–11/13/2012 2 103.8 1.4 2 100.7 4.8 2 9
Appendix 4. Quality-Assurance Data for Fish Tissue 133

Table 4–1C. Quality assurance and quality control for mercury concentration in fish tissue, lab replicates.

[All analyses performed at University of California, Davis. Abbreviations: ENV, environmental sample; ID, identification; mm/dd/yyyy, month/day/year; 

n, number of replicate pairs; ng/g, nanogram per gram; REP, replicate; RPD, relative percent difference; ww, wet weight]

Project ID Analytical 

batch 

Date

(mm/dd/yyyy)

ENV 

(ng/g ww)

REP 

(ng/g ww)

RPD 

(percentage)

SN11-20-NFYEL-RBT-201/80-082411 01SN11 08/24/2011 18.3 18.1 1.1

SN11-40-NFSPA-RBT-320/315-082911 01SN11 08/29/2011 57.6 58.0 0.7

SN11-60-MERBR-RBT-261/163-102111 01SN11 10/21/2011 32.7 30.5 6.9

SB11-05-ALSL4-409-TOSM-Hg4-101111 07SB11 10/11/2011 367.9 357.5 2.9

SN12-84-MCPIP-RBT-162/35-072012 01SN12 07/20/2012 77.9 79.5 2.1

SN12-104-WOLF-BRN-188/66-072312 01SN12 07/23/2012 295.0 295.4 0.1

SN12-124-SWOLF-BRN-177/50-072412 01SN12 07/24/2012 106.8 104.9 1.8

SN12-144-SYASP-BRN-225/116-080712 02SN12 08/07/2012 55.0 53.2 3.2

SN12-164-SYBSP-RBT-200/75-080912 02SN12 08/09/2012 44.2 44.6 0.9

SN12-179-FORDY-BRN-250/131-082312 02SN12 08/23/2012 62.9 62.5 0.6

SN12-200-NFSPA-RBT-214/88-100412 03SN12 10/04/2012 39.0 38.5 1.4

SN12-220-SFABV-RBT-223/106-100912 03SN12 10/09/2012 19.4 20.1 3.4

SN12-240-SFBLW-BRN-196/73-101112 03SN12 10/11/2012 73.2 76.5 4.5

SN12-260-MFMIL-RBT-196/66-101712 04SN12 10/17/2012 64.9 65.5 0.9

SN12-280-SASIL-RBT-285/167-103012 04SN12 10/30/2012 12.0 11.6 2.9

SN12-300-SAMOS-BRN-232/78-110512 04SN12 11/05/2012 68.8 67.5 1.9

SN12-320-MANFK-RBT-193/58-111412 05SN12 11/14/2012 87.1 88.1 1.0

SN12-335-HPOND-LMB-264/243-080812 05SN12 08/08/2012 700.9 730.1 4.1

Table 4–2A. Quality assurance and quality control for selenium 

concentration in fish tissue, standard reference materials and 

matrix blanks.

[All analyses performed at U.S. Geological Survey National Research 

Program, Menlo Park, California. Abbreviations: dw, dry weight; MB, matrix 

blank; N, total number; Se, selenium; SRM, standard reference material; 

μg/g, microgram per gram]

Analytical 

batch number

MB Se 

(μg/g dw)

SRM 

percent recovery

20140416 0.044 98.5

20140416 0.019 98.9

20140423 0.008 104.4

20140423 0.008 100.0

20140425 0.006 99.3

20140425 0.007 94.8

Table 4–2B. Quality assurance and quality control for selenium 

concentration in fish tissue, lab replicates.

[All analyses performed at U.S. Geological Survey National Research 

Program, Menlo Park, California. Abbreviations: dw, dry weight; 

ENV, environmental; ID, identification; REP, replicate; RPD, relative percent 

difference; Se, selenium; μg/g, microgram per gram]

Date 

(mm/dd/yyyy)

Project 

ID

Se REP

 (μg/g dw)

Se ENV

 (μg/g dw)

Se

RPD

10/19/2011 SNI-013 1.02 1.01 0.47

07/22/2012 SNI-042 0.93 0.93 0.38

08/22/2012 SNI-047 0.94 0.93 1.81

10/10/2012 SNI-052 1.26 1.24 1.27

11/13/2012 SNI-057 1.47 1.45 1.17

Publishing support provided by the U.S. Geological Survey 

Science Publishing Network, Sacramento Publishing Service Center

For more information concerning the research in this report, contact the

 Director, California Water Science Center

U.S. Geological Survey

6000 J Street, Placer Hall

Sacramento, California 95819

https://ca.water.usgs.gov
Stumpner and others—Geochemical Data for Water, Streambed Sediment, and Fish Tissue from the Sierra Nevada Mercury Impairment Project, 2011–12—Data Series 1056

ISSN 2327-638X (online)

https://doi.org/10.3133/ds1056