Chemical Constituents in Sediment in 

Lake Pontchartrain and in Street Mud 

and Canal Sediment in New Orleans, 

Louisiana, Following Hurricanes 

Katrina and Rita, 2005

By Peter C. Van Metre, Jennifer T. Wilson, Arthur J. Horowitz, Stanley C. 

Skrobialowski, William T. Foreman, Christopher C. Fuller, Mark R. Burkhardt, 

Kent A. Elrick, Barbara J. Mahler, James J. Smith, and Steven D. Zaugg

National Water-Quality Assessment Program

Data Series 206

U.S. Department of the Interior

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

DIRK KEMPTHORNE, Secretary

U.S. Geological Survey

Mark D. Myers, Director

U.S. Geological Survey, Reston, Virginia: 2007 

For more information about the USGS and its products: 

Telephone: 1-888-ASK-USGS 

World Wide Web: http://www.usgs.gov/

Any use of trade, product, or firm names is for descriptive purposes only and does not imply 

endorsement by the U.S. Government.

Although this report is in the public domain, permission must be secured from the individual 

copyright owners to reproduce any copyrighted material contained within this report.

Suggested citation:

Van Metre, P.C., Wilson, J.T., Horowitz, A.J., Skrobialowski, S.C., Foreman, W.T., Fuller, C.C., Burkhardt, M.R., Elrick, 

K.A., Mahler, B.J., Smith, J.J., and Zaugg, S.D., 2007, Chemical constituents in sediment in Lake Pontchartrain 

and in street mud and canal sediment in New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005: 

U.S. Geological Survey Data Series 206, 159 p.
iii

Contents

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

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

Approach ........................................................................................................................................................3

Sampling Methods ...............................................................................................................................3

Analytical Methods ..............................................................................................................................3

Radionuclides ..............................................................................................................................3

Major and Trace Elements ........................................................................................................4

Organic Compounds ...................................................................................................................4

Chlorinated Hydrocarbons and Polycyclic Aromatic Hydrocarbons ........................4

Urban Waste Indicator Compounds ...............................................................................5

Current-Use Pesticides .....................................................................................................5

Summary of Chemical Constituents in Sediment ....................................................................................6

References Cited ...........................................................................................................................................7

Figures

1. Locations of sampling sites in Lake Pontchartrain and New Orleans, Louisiana, 

following Hurricanes Katrina and Rita .....................................................................................2

Tables

1. Description of sites sampled in Lake Pontchartrain and New Orleans, Louisiana, 

following Hurricanes Katrina and Rita, 2005 ............................................................................9

2. Radionuclide activities in selected sediment samples from Lake Pontchartrain and 

New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005 ............................10

3. Major and trace element concentrations in sediment samples from Lake 

Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005 .....................................................................................................................................12

4. Chlorinated hydrocarbon compound concentrations in sediment samples from 

Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005 ..............................................................................................................................36

5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples 

from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes 

Katrina and Rita, 2005 ................................................................................................................63

6. Urban waste indicator compound concentrations in sediment samples from 

Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005 ..............................................................................................................................99

7. Current-use pesticide concentrations in sediment samples from Lake 

Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005 .............132
iv

Conversion Factors, Abbreviations, and Horizontal Datum

SI to Inch/Pound 

Multiply By To obtain

Length

centimeter (cm) 0.3937 inch (in.)

kilometer (km) 0.6214 mile (mi)

meter (m) 1.094 yard (yd)

micrometer (μm) 3.937 x 10-5 inch (in.)

millimeter (mm) 0.03937 inch (in.)

Area

square centimeter (cm2) 0.1550 square inch (in2)

square kilometer (km2) 0.3861 square mile (mi2)

square meter (m2) 10.76 square foot (ft2)

Volume

liter (L) 0.2642 gallon (gal)

milliliter (mL) 0.034 fluid ounce (fl oz)

Mass

gram (g) 0.03527 ounce avoidupois (oz advp)

milligram (mg) 3.527 x 10-5 ounce avoidupois (oz advp)

Pressure

kilopascal (kPa) 0.1450 pound-force per square inch (lbf/in2)

Temperature in degrees Celsius (oC) may be converted to degrees Fahrenheit (oF) as follows:

oF = 1.8 oC + 32

Abbreviations:

disintegrations per minute per gram, dpm/g

kiloelectronvolt, keV

milligram per kilogram, mg/kg

milligram per liter, mg/L

picocuries per gram, pCi/g

Datum

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).
Chemical Constituents in Sediment in 

Lake Pontchartrain and in Street Mud 

and Canal Sediment in New Orleans, 

Louisiana, Following Hurricanes 

Katrina and Rita, 2005

By Peter C. Van Metre, Jennifer T. Wilson, Arthur J. Horowitz, Stanley C. Skrobialowski, William T. Foreman, 

Christopher C. Fuller, Mark R. Burkhardt, Kent A. Elrick, Barbara J. Mahler, James J. Smith, and 

Steven D. Zaugg 

Abstract

Samples of street mud, suspended and bottom sediment 

in canals discharging to Lake Ponchartrain, and suspended 

and bottom sediment in the lake were collected and analyzed 

for chemical constituents to help evaluate the effects of Hurricanes Katrina and Rita and the subsequent unwatering of 

New Orleans, Louisiana. The approach used for sampling and 

analysis of chemical data for the study is presented herein. 

Radionuclides, major and trace elements, and numerous 

organic compounds in sediment were analyzed. The organic 

compounds include organochlorine pesticides, polychlorinated 

biphenyls, polycyclic aromatic hydrocarbons, urban waste 

indicator compounds, and current-use pesticides. Methods for 

the analysis of urban waste indicator compounds and currentuse pesticides in sediment were developed only recently.

Introduction

Hurricane Katrina made landfall on the U.S. Gulf 

Coast near Buras, La. (about 75 kilometers southeast of 

New Orleans, La. [fig. 1]), early Monday, August 29, 2005. 

Sustained winds during landfall were estimated at 204 

kilo­meters per hour, making the storm a strong Category 3 

hurricane. The tidal surge at New Orleans was 3 to 3.5 meters 

(Graumann and others, 2005). The impact of Hurricane 

Katrina on New Orleans was exacerbated by the city’s location 

on drained wetlands in the Mississippi Delta and by decades of 

subsidence. Levees protect the city to the north and south, and 

canals, aided by large pumping stations, help drain stormwater 

from the city. The tidal surge from Hurricane Katrina caused 

the failure of several levees along the canals, and floodwater 

covered about 75 percent of the city with a maximum volume 

of floodwater equivalent to about 7 percent of the volume of 

Lake Pontchartrain (U.S. Geological Survey, 2005). Water 

depths in some neighborhoods were as much as 3.5 meters, 

and sediment accompanying the floodwater left extensive mud 

deposits in some parts of the city. Sediment-laden floodwater 

was pumped out of the city, mostly into Lake Pontchartrain, 

during the weeks following Hurricane Katrina. 

On September 24, 2005, rain and a tidal surge from Hurricane Rita reopened a levee breach on the Inner Harbor Navigation Canal (commonly known as the Industrial Canal), and 

parts of the city reflooded. Much of this additional floodwater 

was pumped out during the following week. Potential contamination associated with the inundation of numerous urban 

contaminant sources (for example, sewers, sewage-treatment 

facilities, gasoline stations, automobiles, industrial facilities, 

commercial buildings, and houses), as well as inundation of 

historically contaminated soils (Mielke and others, 2004), 

raised concerns for potential effects on human health in New 

Orleans and adverse effects on Lake Pontchartrain from floodwater pumped into the lake.

Lake Pontchartrain is a large, shallow estuary with a 

surface area of 1,630 square kilometers and an average depth 

of about 4 meters. It is connected to the Gulf of Mexico by 

open channels on the southeast side, and the water is brackish. Wind, waves, and tidal fluctuations can resuspend bottom sediment; subsequent sediment redistribution largely is 

controlled by wind strength and direction (Signell and others, 

2002). Along the south side of the lake, adjacent to New 

Orleans, sediment transport predominantly is parallel to shore 

and often to the west, as shown by the plume discharging from 

the Jahncke Canal (fig. 1) on September 13, 2005. Because 

water depths are shallow and mixing of relatively fresh canal 

water and brackish lake water is infrequent (Penland and others, 2002), fine-grained sediment discharged from the canals 

could be distributed widely in the lake. Material remaining in 

suspension ultimately discharges to the Gulf of Mexico. 
0 750 1,500 2,250 3,000 METERS

Zone J J4

J7

J5

J3 JNK

J2

JNK

ONE

Zone G G4

G3

G2

G1

CD

STJ

Zone E E4

E3

E2

E1 NO1

FDL

E5

BON MET

Sample type and ID

Street mud

Suspended sediment

Bottom sediment (core)

Bottom sediment (grab)

EXPLANATION

CD

JNK

A1

BON

Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)

09/13/2005

0 1 2 3 4 KILOMETERS

(see below)

(see below)

(see below)

Zone E

Zone G

Zone J

SPOT 5

09/02/2005

A1

B1 ELM

C1

C2

D1

H2

H1

NAV

CHL

ITC

K1

Flooded area

Unflooded (or less flooded) area

Flooded area

Mississippi River-Gulf Outlet Canal 17th Street Canal

Industrial Canal Industrial Canal

London Avenue Outfall Canal

Jahncke Canal

Lake Pontchartrain

Study area

GULF OF MEXICO

MISSISSIPPI

SABINE RIVER

RIVER

TEX

AS

ARKANSAS

MISSISSIPPI

LOUISIANA

0 150 KILOMETERS

94o 93o 92o 91o

90o

33o

32o

31o

30o

MID RGO

MNT New Orleans

Louisiana Oil Spill Coordinator’s

Office (LOSCO), 1999

Figure 1. Locations of sampling sites in Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita. 

   Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
This report documents sampling and analytical methods 

used in the study and measured concentrations of radionuclides, major and trace elements, and numerous organic 

compounds in sediment from New Orleans and Lake Pontchartrain. Samples of street mud, suspended and bottom 

sediment in canals discharging to the lake, and suspended and 

bottom sediment in the lake were collected by the U.S. Geological Survey (USGS) and analyzed for numerous chemical 

constituents. Concentrations of selected chemical constituents 

are compared to sediment-quality guidelines (SQGs). Interpretations of data listed in this report are presented in Van Metre 

and others (2006).

Approach

The sampling design was based on models of Lake 

Pontchartain sediment transport and deposition (Signell and 

others, 2002), locations of major canals, locations of pumping stations, locations of levee breaches, and observations and 

satellite imagery of sediment plumes in the lake caused by 

canal discharge. Types of sampling sites were designed and 

locations selected (fig. 1; table 1, at end of report) to characterize the sources (street mud—four sites); transport (suspended sediment—four sites on canals, one site in the lake, 

and one site in a flooded neighborhood); and fate (bottom 

sediment—two sites on canals and 27 sites in the lake) of sediment-associated contaminants pumped with floodwater from 

the city. Site selection focused on three canals that discharged 

large amounts of floodwater to the lake (fig. 1, zones E, G, 

and J). Bottom sediment samples also were collected offshore 

from other canals, near the middle of the lake (MID), and at 

the outlet to the Gulf of Mexico (RGO and MNT). All samples 

were collected between September 20 and October 21, 2005, 

after Hurricane Katrina (August 29, 2005) and before and after 

Hurricane Rita (September 24, 2005).

Sampling Methods

Street-mud samples were collected from four sites (fig. 1; 

table 1). Sample NO1 (zone E) was a composite of two 125-

milliliter grab samples collected 1 meter apart; the three other 

samples were composites of nine grab samples collected from 

areas of about 100 square meters. 

Suspended-sediment samples (fig. 1; table 1) were collected from four canals, from offshore of the mouth of one 

canal and from a flooded street in the lower Ninth Ward. The 

samples were obtained by using a peristaltic pump to transfer 

water from about 0.3 meter below the water surface into precleaned polycarbonate containers. The suspended-sediment 

samples from the mouth of the Metairie Outfall Canal (commonly known as the 17th Street Canal) collected on September 20, 2005 (E1 and E2), were from a layer of less saline, low 

dissolved oxygen (about 1.0 milligram per liter) water that was 

assumed to be dominated by canal discharge. Sample volumes 

ranged from 50 to 140 liters. Sediment for elemental analysis 

was isolated by filtration using 0.45-micrometer Teflon filters 

held in a 140-millimeter diameter acrylic filter holder (Mahler 

and Van Metre, 2003) or, in two cases, by flow-through 

centrifugation (Horowitz and others, 2001). Sediment for 

organic-compound analyses was isolated by filtration using 

0.45-micrometer Teflon filters held in a 293-millimeterdiameter stainless-steel filter holder (Mahler and Van Metre, 

2003). 

Bottom-sediment samples (fig. 1; table 1) were collected 

at 19 sites using a 14- by 14-centimeter, 20-centimeter-tall 

stainless-steel box corer with a polycarbonate liner and at 10 

sites using a stainless-steel Ekman grab sampler. The surface 

layer (1 to 2 centimeters) was sliced off the top of the box 

cores using a stainless-steel plate or Teflon-coated spatula. 

Sediment was transferred to either a polycarbonate jar (inorganic analyses) or baked glass jar (organic analyses). At sites 

E4 and H2, deeper sediment was obtained from box cores by 

vertically extruding the core and slicing intervals with a stainless-steel plate; selected samples were analyzed for radionuclides and major and trace elements.

Analytical Methods

Chemical analyses included radionuclides, major 

and trace elements, and organic compounds. Qualityassurance samples were analyzed with each set of environmental samples for all constituents except radionuclides (table 2, at 

end of report), which used different quality-assurance methods. Each sample set number can be used to match the sample 

set with the corresponding quality-assurance results grouped at 

the bottom of tables 3–7 (at end of report). Descriptions of the 

analytical methods follow.

Radionuclides

Selected freeze-dried sediment samples were analyzed 

for radionuclides (table 2) at the USGS National Research 

Program laboratory in Menlo Park, Calif. Cesium-137 (137Cs), 

lead-210 (210Pb), and radium-226 (226Ra) were measured to 

estimate sediment accumulation rates. The short-lived radionuclides beryllium-7 (7

Be) (53.3-day half-life) and thorium-234 

(

234Th) (24.1-day half-life) were measured as indicators of sediment mixing and recent deposition. Activities of total 137Cs, 210Pb, 226Ra, 7

Be, and 234Th were measured simultaneously by 

gamma spectrometry on the basis of American Society of 

Testing and Materials standards C 1402-98 and E 181-98, 

similar to methodology described by Robbins and Edgington 

(1976), Baskaran and Naidu (1995), and Fuller and others 

(1999). Subsamples of freeze-dried sediment samples were 

counted using a high-resolution intrinsic germanium detector gamma spectrometer. Two spectrometers were used, each 

with different detector geometry: (1) well detector, in which 

Approach 
the sample is placed in a borehole in the detector; and (2) axial 

detector, in which the sample is place on top of the detector 

housing. Samples were sealed in 7-milliliter polyethylene 

scintillation vials or in 30- or 60-milliliter polypropylene 

wide-mouth jars. The supported 210Pb activity, defined by 

the 226Ra activity, was determined on each sample from the 

352- and 609-kiloelectronvolt gamma emission lines of 

lead-214 (214Pb) and bismuth-214 (214Bi), respectively, shortlived daughters of 226Ra. The supported activity of 234Th, 

defined by its parent uranium-238 (238U), was determined by 

reanalyzing samples after 5 half-lives or more have elapsed. 

Self-absorption of the gamma emission line for each isotope 

was accounted for using an attenuation factor for each counting container calculated from an empirical relation between 

self-absorption and bulk density developed for this geometry 

on the basis of the method of Cutshall and others (1983). 

Self-absorption of the 214Pb, 214Bi, and 7Be and the 661.5-kiloelectronvolt gamma emission lines of 137Cs was negligible 

for the well detector samples. Detector efficiency for each 

isotope except 7Be was determined from National Institute of 

Standards and Technology (NIST) traceable standards. NIST 

and International Atomic Energy Agency (IAEA) reference 

materials were counted monthly to check detector calibration. 

Because of the short half-life of 7Be, calibration standards 

are not readily available. Instead, the detector efficiency for 

the 477-kiloelectronvolt emission line of 7Be was determined 

using the actinium-228 emission at 463 kiloelectronvolt 

from an IAEA thorium ore certified reference material. This 

approach assumes no substantial difference in detector efficiency over this narrow energy range. The reported uncertainty 

in the measured activity, calculated from the random counting 

error of samples and background spectra at 1 standard deviation, typically was within ±10 percent. The measured activities 

of replicate analysis of material from the same sample agreed 

to within ±15 percent. Measured activities of 7Be were decaycorrected for the period between sample collection and analyses. Decay correction for unsupported 234Th was not necessary 

because the samples had no measurable unsupported activity 

as determined by reanalysis of samples after 5 half-lives or 

more had lapsed.

Major and Trace Elements

Freeze-dried sediment samples were analyzed for a suite 

of major and trace elements, total carbon, total organic carbon, 

and total nitrogen (table 3). The analyses of all elements, 

except total carbon, total organic carbon, and total nitrogen, 

were done following modifications of the procedures of 

Horowitz and others (1989). For all elements except antimony, 

arsenic, mercury, and selenium, 250- or 500-milligram 

aliquots were digested with a combination of hydrofluoric 

acid/perchloric acid/aqua regia in Teflon beakers at 200 

degrees Celsius (°C); the resulting salts were solubilized using 

50 milliliters of 0.5-percent nitric acid. Cadmium, lead, and 

silver concentrations were determined by flame atomic absorption spectrometry (AAS) using a flame ionization tube, mixed 

salt standards, and background correction. All other elements 

were analyzed by simultaneous inductively coupled plasmaatomic emission spectroscopy (ICP–AES) with an axial torch, 

using inter-element correction factors. Aliquots from the 

same digestion solutions were used for the determination of 

antimony, arsenic, and selenium, but final solutions were made 

up in 50-percent hydrochloric acid. Selenium was determined 

on the digestate (in 50-percent hydrochloric acid); antimony 

and arsenic were determined after the addition of an oxalic 

acid/hydroxylamine solution with subsequent reduction. 

Determination of selenium was by hydride generation AAS, 

whereas antimony and arsenic were by hydride generation 

ICP–AES. Mercury was analyzed using separate 250- or 500-

milligram aliquots digested with LeFort aqua regia at 100 °C 

with quantitation by cold vapor employing an AAS as the 

detector. 

Total carbon and total nitrogen were determined on 100- 

to 200-milligram sample aliquots by the evolution (combustion) of both carbon dioxide and mixed nitrogen oxides using a 

carbon/nitrogen analyzer with a thermal conductivity detector. 

Total organic carbon was determined by analyzing sample aliquots pretreated with 10-percent hydrochloric acid to remove 

inorganic carbonates prior to the analysis, by the evolution 

(combustion) of carbon dioxide using a carbon/sulfur analyzer 

with an infrared detector. 

Analytical precision and bias were monitored by the 

replicate analyses of 10 percent of the samples (precision) and 

by the concomitant digestion and analysis of various NIST 

and USGS reference materials (precision and bias), and found 

to be similar to those reported in Horowitz and Elrick (1985), 

Elrick and Horowitz (1985, 1987), and Horowitz and others 

(1989). Precision typically was ±10 percent or better; no bias 

was detected. However, when sediment-associated elemental 

concentrations approached the laboratory reporting levels, 

precision could be as low as ±100 percent. 

Organic Compounds

Analyses included organochlorine pesticides, polychlorinated biphenyls (PCBs) (table 4), polycyclic aromatic 

hydrocarbons (PAHs) (table 5), urban waste indicator (UWI) 

compounds (table 6), and current-use pesticides (table 7). In 

some cases, compounds were quantified by more than one 

method. 

Chlorinated Hydrocarbons and Polycyclic Aromatic 

Hydrocarbons

Organochlorine pesticides, PCBs, PAHs, and alkylsubstituted PAHs (alkyl-PAHs) were extracted, isolated, and 

analyzed using the procedures of Noriega and others (2003) 

and Olson and others (2003). Wet bottom sediment was 

extracted overnight with in a Soxhlet apparatus. Two aliquots of the sample extract were quantitatively injected into a 

 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
polystyrene-divinylbenzene gel permeation column (GPC) and 

eluted with dichloromethane to remove sulfur and partially 

isolate the target analytes. Eluent from the first aliquot was 

analyzed for PAHs and alkyl-PAHs by capillary-column gas 

chromatography (GC) with detection by full-scan mass spectrometry (MS) or by selected ion monitoring MS. Nineteen 

parent PAHs, 10 specific alkyl-PAHs, and the homologous 

series of alkyl-PAHs for 2- to 5-ringed PAH were determined. 

Total PAH refers to the summation used by MacDonald and 

others (2000) for the probable effect concentration (PEC), 

an SQG, and hereinafter is designated as ΣPAHSQG. Eluent 

from the second GPC aliquot was split into two fractions by 

combined alumina/silica adsorption chromatography followed 

by Florisil adsorption chromatography for further cleanup 

of the second fraction. Both fractions were analyzed by dual 

capillary-column GC with electron capture detection for the 

determination of the organochlorine pesticides and PCBs. 

PCBs were quantified as individual Aroclor (1016/1242, 1254, 

or 1260) equivalents and as 27 specific congeners. 

Quality assurance for organic-compound analyses by 

these methods was provided by analyzing an environmental 

duplicate sample split at the laboratory, laboratory reagent 

blanks, and spiked reagent samples with each set of 12 environmental samples, and by monitoring recovery of surrogate 

compounds in all samples. Although the methods were the 

same for street mud, suspended sediment, and bottom sediment, sample mass was much smaller for suspended-sediment samples, thus affecting laboratory reporting levels and 

precision and limiting the number of duplicates analyzed. 

Van Metre and others (2004) reported that the median relative 

percent difference (RPD) using these methods for sediment 

core samples for chlorinated hydrocarbons was 11.8 percent 

for 41 lab duplicate samples and for PAHs was 11.9 percent 

for 40 lab duplicate samples.

Urban Waste Indicator Compounds

The UWI analytical method measures a diverse suite 

of organic compounds that reflects urban non-point sources 

and wastewater inputs to surface waters (Kolpin and others, 

2002); methods for analysis of UWI compounds in sediment 

were developed only recently (Burkhardt, ReVello, and others, 

2005; Burkhardt, Zaugg, and others, 2006). The compounds 

measured by the UWI method fall into four groups: PAHs and 

related compounds, fecal and sewage indicator compounds, 

industrial chemicals, and pesticides and other household 

chemicals. Wet bottom sediment was extracted twice, using 

isopropanol/water mixtures on a commercially available accelerated solvent extraction (ASE) system. These extracts were 

then diluted and method compounds were extracted from the 

buffer solution using solid-phase extraction (SPE) cartridges. 

A mixture of dichloromethane/diethyl ether was used to elute 

the method compounds from the SPE cartridge and passed 

through a 1-gram Florisil SPE column. These SPE extracts 

were reduced in volume and fortified with internal injection 

standards. The sample extracts were analyzed for 61 compounds by capillary-column GC with detection by full-scan 

MS. 

The UWI compounds were reported as individual 

compounds except for the nonylphenols and octylphenols, 

which were reported as estimated concentrations because the 

reference standards are from technical mixtures. The ASE is a 

more vigorous extraction technique than the dichloromethaneSoxhlet extraction used for the chlorinated hydrocarbons and 

PAHs. As a result, analytical results from the two methods are 

not comparable. Quality assurance was provided by analyzing an environmental duplicate sample split at the laboratory, 

laboratory reagent blanks, and spiked reagent samples, and by 

monitoring recovery of surrogate compounds in all samples. 

Burkhardt, ReVello, and others (2005) reported that the 

median precision using this method for PAHs on a standard 

reference material was 102 ±11.1 percent. Median recovery for 

spiked sand samples included with environmental samples for 

all UWI compounds was 76 percent for this study. Although 

the methods were the same for the street-mud, suspendedsediment, and bottom-sediment samples, small sample mass 

for suspended-sediment samples affected laboratory reporting levels and precision and limited the number of duplicates 

analyzed. Five environmental duplicate samples analyzed for 

UWI compounds for this study had a median RPD of 22 percent for the 19 analyte pairings detected. An acceptable range 

of RPDs for this method has not been established because this 

is a recently developed analytical method.

Current-Use Pesticides

Sediment samples were extracted with 25-percent acetone 

in dichloromethane in an ASE system at 100 °C under pressurized conditions (10,342 kilopascals). Resultant extracts were 

dried with sodium sulfate, reduced in volume, and exchanged 

to ethyl acetate using Kuderna-Danish distillation and nitrogen 

gas evaporation. The extract was introduced to a graphitized 

carbon SPE column and eluted with a 50-percent dichloromethane in ethyl acetate solution. The eluent was reduced and 

the analytes were further isolated from elemental sulfur by 

GPC using ethyl acetate mobile phase. The GPC fraction was 

reduced and a procedural internal standard solution of perdeuterated PAHs was added to the extract before final solvent 

reduction and exchange to toluene. Sixty-three analytes in the 

extract were determined by GC/MS operated in the selectedion monitoring mode using procedures described in Zaugg and 

others (1995), Sandstrom and others (2001), and Madsen and 

others (2003); 62 of the analytes were determined by those 

filtered-water methods. 

Quality assurance for current-use pesticide analyses by 

these methods was provided by analyzing an environmental 

duplicate sample split at the laboratory, laboratory reagent 

blanks, and spiked reagent samples with each set of 3 to 20 

environmental samples, and by monitoring recovery of surrogate compounds in all samples. Thirty of the 63 method analytes exhibited acceptable performance (between 60 and 120 

percent median recovery and no more than 25 percent relative 

Approach   
standard deviation) in 21 reagent spikes. Concentrations of 

the 33 other analytes, if detected, are reported as estimated 

because of greater bias or variability or recognized GC thermal 

instability (Foreman and others, 2005). Median recovery was 

81 percent for all analytes in the five reagent spikes analyzed 

with environmental samples for this study. Four environmental 

duplicate samples analyzed for current-use pesticides for this 

study had a median RPD of 9 percent for the six analyte pairings detected.

Summary of Chemical Constituents in 

Sediment

Constituents from six major chemical groups were measured: radionuclides, major and trace elements, organochlorine 

pesticides and PCBs, PAHs, UWI compounds, and current-use 

pesticides. The results of the chemical analyses are presented 

in tables 2–7. Interpretations of data listed in this report are 

presented in Van Metre and others (2006). In general, concentrations were much higher in street mud and suspended sediment than in lake bottom sediment, and concentrations among 

the lake bottom-sediment samples were highest near the 17th 

Street Canal.

The consensus-based SQGs of MacDonald and others (2000) are listed for inorganic and organic constituents 

below the analytical results (tables 3, 4, and 5). Two SQGs are 

listed—the threshold effect concentration (TEC) and probable 

effect concentration (PEC). The TEC represents the concentration in freshwater sediment below which adverse effects to 

benthic biota occur rarely, and the PEC represents the concentration in freshwater sediment above which adverse effects 

are expected to occur frequently. The consensus-based SQGs 

are used as screening-level benchmarks and do not provide 

evidence for actual toxicity to aquatic organisms or humans 

as a result of exposure to the sediment samples collected for 

this study. Consensus-based SQGs are recommended for 

individual constituents and sums of organochlorine pesticides, PCBs, and PAHs. Total DDT is defined as the sum of 

p,p’-DDD, p,p’-DDE, and p,p’-DDT. Total PCB Aroclors is 

the sum of PCB Aroclors 1016/124, 1254, and 1260. Total 

PCB congeners is the sum of the 27 PCB congeners reported 

by the laboratory, ranging from PCB 8 to PCB 206. TotalSQG PAH (ΣPAHSQG) is the sum of 13 PAHs: acenaphthene, 

acenaphthylene, anthracene, fluorene, 2-methylnaphthalene 

(substitute C1–128 isomers, methylated naphthalenes in our 

calculations), naphthalene, phenanthrene, benz(a)anthracene, 

dibenzo(a,h)anthracene, benzo(a)pyrene, chrysene, fluoranthene, and pyrene (Ingersoll and others, 2000; MacDonald and 

others, 2000). In all summations of the analytical results, nondetections were assigned a value of zero and estimated values 

were used at the concentration reported. 

Field observations and radionuclide activities indicate 

sediment redistribution and deposition resulting from Hurricanes Katrina and Rita. Sediment that was recently in contact 

with the atmosphere was identified by the presence of 7Be 

(table 2). 7Be is a short-lived, naturally occurring radionuclide 

that is useful for dating sediment to about 1 year. The presence 

of 7Be in a bottom-sediment core is an indication that the sediment was in contact with the atmosphere within the past year 

(Holmes, 1998). Activities of 7Be greater than 3 disintegrations per minute per gram were detected in samples collected 

after Hurricane Katrina but before Hurricane Rita from sites 

E2 and E3 in front of the 17th Street Canal and from site H2 in 

front of the Industrial Canal. 7Be was detected throughout the 

entire thickness of the core collected at site H2 after Hurricane 

Rita.

In general, trace element and nutrient concentrations were 

higher in street-mud samples and suspended-sediment and 

bottom-sediment samples from the 17th Street Canal area than 

from other locations (table 3). Lead and zinc concentrations 

exceed the PECs most often for the inorganic constituents 

with six and 10 concentrations higher than the PEC, respectively. In comparison to the mid-lake reference site (MID), 

some suspended-sediment samples (E1, E2, G1) had elevated 

concentrations of copper, lead, silver, and zinc. Among the 

bottom-sediment samples, only those collected near the 17th 

Street Canal (MET on September 29 and October 3; E2 on 

September 21 and October 9; E3 on October 9) had higher 

trace element concentrations (cadmium, copper, lead, mercury, 

and zinc) relative to MID, except for higher barium concentrations at H2.

The highest concentrations of organochlorine compounds, PCBs, PAHs, and current-use pesticides occurred 

near the 17th Street Canal (tables 4, 5, and 7). The most 

frequently detected chlorinated compounds were p,p’-DDD, 

p,p’-DDE, dieldrin, cis-chlordane, trans-chlordane, transnonachlor, and PCBs (table 4). Concentrations of p,p’-DDD 

exceed the PEC at sites E3 and CD, and concentrations of 

total PCB Aroclors exceed the PEC at sites MET and E3. 

The most frequently detected PAHs were the 3-, 4-, and 

5-ring parent PAHs and 2,6-dimethyl­naphthalene (table 

5). Each of the PECs for individual PAHs and ΣPAHSQG is 

exceeded in one or more samples. Sixteen of the 61 UWI 

compounds reported were detected in 50 percent or more 

of samples, including parent and methyl-substituted PAHs, 

anthraquinone, indole, 3-methyl-1H-indole, para-cresol, 

cholesterol, and beta-sitosterol and beta-stigmastanol 

(table 6). In most cases, suspended-sediment samples had 

higher concentrations of the UWI compounds than bottomsediment and street-mud samples. UWI compound concentrations were not highest in the samples collected near 

the 17th Street Canal, as was the case for the inorganic 

and other organic constituents. Thirteen of the 63 currentuse pesticides analyzed were detected at least once (table 7). 

Among these, chlorpyrifos and three fipronil degradates 

(fipronil sulfide, fipronil sulfone, and desulfinyl-fipronil) were 

detected in 40 percent or more of the samples. No consensusbased SQGs are recommended for most of the UWI compounds or current-use pesticides.

 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
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and Hayes, Laura, eds., Lake Pontchartrain Basin—Bottom 

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 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 1

Table 1. Description of sites sampled in Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005.

[ID, identifier; - -, not applicable; na, not available]

USGS

station ID

Site

ID Sample type GPS coordinates (NAD 83) Water depth (meters) Date(s) sampled Latitude Longitude

Zone E—17th Street Canal

300113090064901 NO1 Street mud 30°01'13" 90°06'49" - - 9/21/2005

300056090070301 FDL Street mud 30°00'56" 90°07'03" - - 10/03/2005

300125090071701 E1 Suspended sediment 30°01'25" 90°07'17" 2.7 9/20/2005, 10/03/2005

300136090072001 E2 Suspended sediment 30°01'36" 90°07'20" 3.0 9/20/2005

300125090074400 MET Bed sediment (dredge) 30°01'25" 90°07'17" 3.5 9/29/2005, 10/03/2005

300136090072001 E2 Bed sediment (box core) 30°01'36" 90°07'20" 2.9 9/21/2005, 10/09/2005

300144090072001 E3 Bed sediment (box core) 30°01'44" 90°07'20" 3.7 9/21/2005, 10/09/2005

300202090071401 E4 Bed sediment (box core) 30°02'02" 90°07'14" 4.3 9/21/2005, 10/09/2005

300143090081401 E5 Bed sediment (box core) 30°01'43" 90°08'14" 3.7 10/09/2005

300114090083900 BON Bed sediment (dredge) 30°01'14" 90°08'39" 1.8 9/29/2005

Zone G—London Avenue Canal

300110090040401 CD Street mud 30°01'10" 90°04'04" - - 10/03/2005

300152090042701 G1 Suspended sediment 30°01'52" 90°04'27" na 10/03/2005

300159090043001 G2 Bed sediment (box core) 30°01'59" 90°04'30" 3.4 10/10/2005

300205090043401 G3 Bed sediment (box core) 30°02'05" 90°04'34" 4.1 10/10/2005

300243090043501 G4 Bed sediment (box core) 30°02'43" 90°04'35" 4.3 10/10/2005

300142090045800 STJ Bed sediment (dredge) 30°01'42" 90°04'58" 3.0 9/26/2005

Zone J—Jahncke Canal

300355089571801 ONE Street mud 30°03'55" 89°57'18" - - 10/04/2005

300330089575801 JNK Suspended sediment 30°03'30" 89°57'58" na 10/04/2005

300243090043501 J2 Bed sediment (box core) 30°02'43" 90°04'35" 4.3 10/10/2005

300344089581000 JNK Bed sediment (dredge) 30°03'44" 89°58'10" 1.2 9/27/2005, 10/01/2005

300243090043501 J3 Bed sediment (box core) 30°02'43" 90°04'35" 4.3 10/10/2005

300342089584101 J7 Bed sediment (box core) 30°03'42" 89°58'41" 4.3 10/10/2005

300418089583801 J4 Bed sediment (box core) 30°04'18" 89°58'38" 4.3 10/10/2005

300313089591401 J5 Bed sediment (box core) 30°03'13" 89°59'14" 4.3 10/10/2005

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 30°01'58" 90°02'06" 18.3 9/21/2005

295808090001601 CHL Suspended sediment 29°58'08" 90°00'16" .1 10/04/2005

300018089562300 ITC Bed sediment (dredge) 30°00'18" 89°56'23" 5.1 9/29/2005, 10/05/2005

300054090014600 NAV Bed sediment (dredge) 30°00'54" 90°01'46" 10.7 10/05/2005

300243090043501 H2 Bed sediment (box core) 30°02'43" 90°04'35" 4.3 10/10/2005

300123090104301 D1 Bed sediment (box core) 30°01'23" 90°10'43" .9 10/09/2005

300125090130801 C2 Bed sediment (box core) 30°01'25" 90°13'08" 3.7 10/09/2005

300202090125901 C1 Bed sediment (box core) 30°02'02" 90°12'59" 1.7 10/09/2005

300214090130300 ELM Bed sediment (dredge) 30°02'14" 90°13'03" 3.0 9/26/2005, 9/30/2005

300236090144101 B1 Bed sediment (box core) 30°02'36" 90°14'41" 1.7 10/09/2005

300303090152601 A1 Bed sediment (box core) 30°03'03" 90°15'26" 2.5 10/09/2005

300445089565501 K1 Bed sediment (box core) 30°04'45" 89°56'55" 4.3 10/10/2005

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 30°11'51" 90°07'57" 5.5 9/28/2005, 10/04/2005, 10/20/2005

301001089442600 RGO Bed sediment (dredge) 30°10'01" 89°44'26" na 9/28/2005, 10/21/2005

300403089481300 MNT Bed sediment (dredge) 30°04'03" 89°48'13" na 9/28/2005, 10/21/2005

Table 1 
Table 2. Radionuclide activities in selected sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following 

Hurricanes Katrina and Rita, 2005. 

[ID, identifier; cm, centimeters; pCi/g, picocuries per gram; std. dev., standard deviation; dpm/g, disintegrations per minute per gram; <, less than; - -, not 

applicable; dup, duplicate; na, not available]

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample 

type

Sample

date

Cesium137

(pCi/g)

Cesium137

uncertainty,

1 std. dev.

Lead210

(dpm/g)

Lead-210 

uncertainty, 

1 std. 

dev.

Radium226

(dpm/g)

Radium226

uncertainty,

1 std. dev.

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 0.06 0.02 5.08 0.31 2.16 0.06

300056090070301 FDL Street mud 10/03/2005 .12 .01 2.28 .27 1.93 .12

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 .07 .01 4.80 .37 1.80 .11

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 .07 .02 3.14 .25 2.25 .07

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 .03 .01 5.35 .43 2.27 .13

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 .10 .03 5.67 .31 1.86 .06

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 .12 .02 7.22 .61 2.09 .18

300202090071401 E4 1–2 Bed sediment (box core) 9/21/2005 .12 .02 6.96 .58 2.09 .18

300202090071401 E4 2–3 Bed sediment (box core) 9/21/2005 .11 .01 7.12 .50 2.14 .13

300202090071401 E4 3–4 Bed sediment (box core) 9/21/2005 .11 .02 6.64 .50 2.35 .15

300202090071401 E4 4–6 Bed sediment (box core) 9/21/2005 .10 .01 4.72 .39 2.32 .13

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 .11 .03 5.63 .39 2.10 .09

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 <.01 - - 1.65 .32 1.32 .09

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 .17 .01 5.30 .38 2.02 .10

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 .02 .01 1.09 .13 .85 .05

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 .14 .04 5.84 .40 1.64 .08

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 .15 .04 4.85 .33 2.03 .07

Zone J—Jahncke Canal

300355089571801 ONE axial Street mud 10/04/2005 .03 .01 3.07 .24 1.71 .08

300355089571801 ONE axial dup. Street mud 10/04/2005 .02 .01 3.29 .25 1.64 .08

300355089571801 ONE well Street mud 10/04/2005 .04 .02 2.89 .27 1.64 .07

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 <.01 - - .83 .17 .83 .07

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 .02 .01 3.00 .31 2.05 .12

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 .06 .02 3.40 .23 1.21 .05

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 .09 .02 4.35 .29 1.73 .06

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 <.01 - - 1.74 .21 1.73 .09

Other suspended and bed sediment samples

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 .13 .03 4.86 .35 1.86 .08

300224090021901 H2 0.5–1 Bed sediment (box core) 9/21/2005 .11 .03 5.16 .37 1.86 .08

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 .11 .03 4.70 .31 1.83 .07

300224090021901 H2 2–3 Bed sediment (box core) 9/21/2005 .10 .02 4.18 .25 1.77 .05

300224090021901 H2 3–4 Bed sediment (box core) 9/21/2005 .08 .02 3.85 .27 1.88 .06

300224090021901 H2 4–5 Bed sediment (box core) 9/21/2005 .10 .03 4.40 .33 2.04 .08

300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 .10 .03 4.62 .27 1.59 .05

300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 .08 .01 3.80 .32 1.75 .11

300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 .02 .01 2.04 .21 1.26 .08

300224090021901 H2 3–4 Bed sediment (box core) 10/03/2005 .05 .01 2.87 .30 1.37 .10

300224090021901 H2 4–5 Bed sediment (box core) 10/03/2005 .11 .03 4.05 .26 1.71 .05

300224090021901 H2 5–7 Bed sediment (box core) 10/03/2005 .13 .03 5.06 .32 1.79 .06

300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 .11 .03 5.90 .29 1.90 .05

300224090021901 H2 9–11 Bed sediment (box core) 10/03/2005 .13 .01 6.00 .43 1.98 .10

300224090021901 H2 11–13 Bed sediment (box core) 10/03/2005 .14 .01 5.63 .40 1.99 .10

300224090021901 H2 13–15 Bed sediment (box core) 10/03/2005 .13 .03 5.55 .30 1.87 .05

300224090021901 H2 15–17 Bed sediment (box core) 10/03/2005 .12 .01 5.77 .39 1.98 .09

300224090021901 H2 17–19 Bed sediment (box core) 10/03/2005 .13 .03 5.80 .34 1.80 .06

300224090021901 H2 19–21 axial Bed sediment (box core) 10/03/2005 .13 .03 5.92 .34 1.88 .06

300224090021901 H2 19–21 well Bed sediment (box core) 10/03/2005 .12 .01 5.89 .41 2.02 .10

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 <.01 - - 1.51 .16 1.68 .08

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 .07 .01 3.85 .32 2.46 .12

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 .05 .01 2.91 .29 2.30 .13

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 .10 .03 4.04 .30 2.17 .07

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 .08 .02 2.83 .34 2.16 .15

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 .07 .02 3.29 .26 2.02 .07

Table 2

10 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 2. Radionuclide activities in selected sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following 

Hurricanes Katrina and Rita, 2005.

USGS

station ID

Unsupported 

lead-210

(dpm/g)

Unsupported 

lead-210 

uncertainty, 

1 std. dev.

Beryllium-7

(dpm/g)

Beryllium-7

uncertainty, 

1 std. dev.

Decay 

corrected 

beryllium-7, 

(dpm/g)

Decay 

corrected 

beryllium-7

uncertainty,

1 std. dev.

Total 

thorium234

(dpm/g)

Total 

thorium234 uncertainty, 

1 std. dev.

Supported 

thorium234

(dpm/g)

Supported 

thorium-234

uncertainty,

1 std. dev.

Zone E—17th Street Canal

300113090064901 2.92 0.32 1.41 0.23 1.81 0.30 2.94 0.27 na na

300056090070301 .35 .30 <.3 - - <.3 - - 1.94 .27 na na

300136090072001 3.00 .39 3.67 .22 4.69 .29 2.39 .25 2.33 0.30

300136090072001 .90 .26 .71 .27 1.18 .45 2.40 .26 2.91 .22

300144090072001 3.08 .45 2.66 .23 3.40 .30 3.18 .29 3.72 .36

300144090072001 3.81 .32 2.22 .31 3.64 .51 3.80 .26 3.64 .35

300202090071401 5.13 .64 1.70 .33 2.18 .43 3.03 .41 4.80 .46

300202090071401 4.87 .61 2.06 .31 2.64 .40 3.56 .44 4.41 .48

300202090071401 4.97 .52 2.05 .23 2.62 .30 4.22 .36 na na

300202090071401 4.28 .52 1.38 .25 1.76 .32 3.29 .36 na na

300202090071401 2.40 .41 1.13 .19 1.45 .24 2.38 .30 2.71 .22

300202090071401 3.52 .40 1.20 .39 2.00 .65 3.10 .36 3.47 .38

300143090081401 .33 .33 <.3 - - <.3 - - 2.57 .39 na na

Zone G—London Avenue Canal

300110090040401 3.28 .40 1.77 .18 2.91 .30 3.21 .26 na na

300159090043001 .24 .14 <.3 - - <.3 - - .95 .13 na na

300205090043401 4.20 .41 2.22 .48 3.69 .80 3.76 .37 3.30 .32

300243090043501 2.83 .34 1.84 .43 3.05 .71 3.59 .32 3.33 .26

Zone J—Jahncke Canal

300355089571801 1.36 .25 3.49 .18 5.72 .30 1.92 .18 na na

300355089571801 1.65 .26 3.43 .20 5.62 .33 1.93 .18 na na

300355089571801 1.25 .28 3.76 .48 6.17 .79 2.04 .28 na na

300337089580701 .00 .18 .30 .16 .50 .27 .89 .18 na na

300344089581701 .96 .33 .86 .27 1.43 .45 2.05 .27 2.56 .24

300342089584101 2.19 .23 1.24 .29 2.06 .48 2.48 .22 2.44 .24

300418089583801 2.61 .30 1.78 .36 2.96 .59 3.29 .29 3.38 .34

300313089591401 .01 .23 .76 .19 1.26 .32 2.09 .22 1.92 .21

Other suspended and bed sediment samples

300224090021901 3.01 .36 2.60 .32 3.33 .41 4.38 .37 4.05 .36

300224090021901 3.30 .38 1.39 .30 1.79 .38 3.66 .37 2.97 .31

300224090021901 2.88 .32 .68 .23 .88 .30 2.61 .29 2.40 .23

300224090021901 2.41 .26 .57 .18 .73 .23 2.74 .23 2.41 .22

300224090021901 1.96 .27 <.3 - - <.3 - - 2.40 .26 na na

300224090021901 2.36 .34 <.3 - - <.3 - - 2.54 .32 na na

300224090021901 3.03 .28 1.78 .24 2.70 .36 2.95 .25 2.77 .25

300224090021901 2.05 .33 2.36 .22 3.57 .33 2.45 .27 2.62 .32

300224090021901 .79 .22 .84 .13 1.27 .19 1.62 .19 1.31 .19

300224090021901 1.50 .32 1.05 .20 1.59 .30 2.41 .32 na na

300224090021901 2.33 .26 .99 .18 1.50 .28 2.83 .25 2.34 .24

300224090021901 3.27 .32 1.37 .25 2.07 .38 3.39 .29 na na

300224090021901 4.00 .29 1.10 .19 1.67 .29 3.19 .21 na na

300224090021901 4.01 .44 1.27 .18 1.93 .27 3.33 .25 3.08 .23

300224090021901 3.64 .41 1.09 .16 1.65 .25 3.17 .24 3.06 .24

300224090021901 3.67 .30 .91 .20 1.39 .31 3.33 .23 na na

300224090021901 3.80 .40 1.07 .14 1.63 .22 3.15 .22 na na

300224090021901 4.00 .35 .98 .29 1.48 .44 3.43 .29 na na

300224090021901 4.04 .35 1.32 .29 2.01 .44 3.24 .28 3.55 .30

300224090021901 3.86 .42 1.12 .19 1.71 .28 2.64 .22 na na

300123090104301 -.18 .18 .39 .13 .64 .22 1.93 .17 na na

300125090130801 1.39 .34 .75 .22 1.23 .36 2.66 .26 2.82 .22

300202090125901 .61 .32 .90 .23 1.48 .38 2.34 .27 2.59 .09

300236090144101 1.87 .31 1.54 .38 2.53 .62 3.38 .31 2.80 .26

300303090152601 .67 .37 <.3 - - <.3 - - 2.46 .33 na na

300445089565501 1.27 .27 1.64 .31 2.72 .52 2.75 .27 2.98 .35

Table 2 11
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Total

carbon

(percent)

Total organic 

carbon

(percent)

Total

nitrogen

(percent)

Aluminum

(percent)

Iron

(percent)

Titanium

(percent)

Zone E—17th Street Canal

300113090064901 NO1 Street mud Bulk 9/21/2005 Set A 5.0 4.1 0.35 6.7 3.1 0.35300113090064901 NO1 dup. Street mud Bulk 9/21/2005 Set A 5.1 4.2 .35 6.5 3.0 .34300056090070301 FDL Street mud Bulk 10/03/2005 Set B 2.4 2.1 .12 4.9 2.0 .24300125090071701 E1 Suspended sediment Bulk 9/20/2005 Set B 7.6 7.0 1.1 2.1 4.9 .10300125090071701 E1 Suspended sediment Bulk 10/03/2005 Set B 5.8 is .71 4.8 3.4 .22300136090072001 E2 Suspended sediment Bulk 9/20/2005 Set B 7.1 6.6 1.0 2.3 3.1 .11300125090074400 MET Bed sediment (dredge) Bulk 9/29/2005 Set B 1.2 .9 .08 4.2 1.2 .23300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 9/29/2005 Set B 1.4 1.2 .10 4.4 1.5 .31300125090074400 MET Bed sediment (dredge) Bulk 10/03/2005 Set B 8.0 7.0 .45 5.8 3.1 .33300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 10/03/2005 Set B 6.3 6.1 .44 6.2 3.4 .36300136090072001 E2 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A 4.3 3.4 .25 4.6 2.0 .27300136090072001 E2 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B 2.2 1.8 .13 4.7 1.8 .31300144090072001 E3 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A 10 8.5 .63 5.4 2.7 .29300144090072001 E3 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 4.9 4.3 .35 6.6 3.2 .35300144090072001 E3 0–2 dup. Bed sediment (box core) Bulk 10/09/2005 Set B 5.0 4.3 .36 6.5 3.2 .36300202090071401 E4 0–1 Bed sediment (box core) Bulk 9/21/2005 Set A 5.2 4.3 .39 7.5 3.7 .39300202090071401 E4 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A 5.9 4.8 .41 6.8 3.5 .37300202090071401 E4 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A 5.4 4.6 .38 6.7 3.4 .37300202090071401 E4 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A 4.9 4.1 .35 6.6 3.2 .37300202090071401 E4 4–6 Bed sediment (box core) Bulk 9/21/2005 Set A 2.3 1.8 .17 6.4 2.8 .37300202090071401 E4 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 3.2 3.0 .23 6.7 3.1 .38300143090081401 E5 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 12 10 .70 5.1 2.6 .29300114090083900 BON Bed sediment (dredge) Bulk 9/29/2005 Set B .6 .3 .03 4.0 1.1 .21300114090083900 BON dup. Bed sediment (dredge) Bulk 9/29/2005 Set B .6 .4 .04 4.0 1.0 .20

Zone G

—London Avenue Canal

300110090040401 CD Street mud Bulk 10/03/2005 Set B 3.8 3.6 .27 7.2 3.5 .39300152090042701 G1 Suspended sediment Bulk 10/03/2005 Set B 12 9.5 1.4 4.8 5.7 .20

Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005. [All concentrations in micrograms per gram except where indicated. Concentration in bold exceeds probable effect concentration (MacDonald and others, 2000). ID, identifier; dup., duplicate; <, less than or nondetection at indicated value; μm, microns; is, insufficient sediment; - -, not applicable; na, not available; nd, nondetection with no reporting limit provided]

Table 3

12 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Total

carbon

(percent)

Total organic 

carbon

(percent)

Total

nitrogen

(percent)

Aluminum

(percent)

Iron

(percent)

Titanium

(percent)

Zone G—London Avenue Canal—Continued

300159090043001 G2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 0.3 0.3 0.03 2.0 0.65 0.17300205090043401 G3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 3.1 2.6 .27 8.1 4.0 .41300205090043401 G3 0–1 dup. Bed sediment (box core) Bulk 10/10/2005 Set B 3.0 2.7 .28 7.9 3.9 .40300243090043501 G4 0–2 Bed sediment (box core) Bulk 10/10/2005 Set B 2.2 1.9 .21 8.1 3.8 .44300142090045800 STJ Bed sediment (dredge) Bulk 9/26/2005 Set B .5 .4 .04 3.6 1.0 .29300142090045800 STJ Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B .5 .5 .05 4.2 1.2 .42

Zone J—Jahncke Canal

300355089571801 ONE Street mud Bulk 10/04/2005 Set B 1.8 1.5 .15 4.4 1.4 .26300330089575801 JNK Suspended sediment Bulk 10/04/2005 Set B 2.7 2.5 .34 .3 .62 <.01300337089580701 J2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .1 <.1 <.01 1.9 .37 .14

300344089581000 JNK Bed sediment (dredge) Bulk 9/27/2005 Set B .4 .4 .04 3.7 .8 .23300344089581000 JNK dup. Bed sediment (dredge) Bulk 9/27/2005 Set B .6 .4 .06 3.8 .8 .22300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 9/27/2005 Set B 1.2 1.2 .13 5.2 1.9 .53300344089581000 JNK Bed sediment (dredge) Bulk 10/01/2005 Set B 1.4 .7 .08 3.7 1.5 .21300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 10/01/2005 Set B 2.2 1.7 .20 5.8 2.7 .35300344089581701 J3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 1.2 .9 .11 4.7 1.6 .28300342089584101 J7 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 1.7 1.3 .17 4.8 2.2 .26300418089583801 J4 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 2.1 1.6 .20 7.7 3.6 .39300313089591401 J5 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .5 .4 .04 4.0 1.1 .25

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment Bulk 9/21/2005 Set B is is is .9 .73 .05295808090001601 CHL Suspended sediment Bulk 10/04/2005 Set B 4.7 4.4 .63 2.6 1.6 .12300018089562300 ITC Bed sediment (dredge) Bulk 9/29/2005 Set B 3.8 3.8 .30 6.5 2.8 .36300018089562300 ITC Bed sediment (dredge) Bulk 10/05/2005 Set B .9 .6 .05 4.2 1.5 .26300018089562300 ITC Bed sediment (dredge) Sieved (<63 μm) 10/05/2005 Set B 1.2 .8 .08 5.9 2.2 .36300018089562300 ITC Bed sediment (dredge) Bulk 10/20/2005 Set B 8.3 8.0 .29 6.3 3.4 .32300018089562300 ITC dup. Bed sediment (dredge) Bulk 10/20/2005 Set B 8.2 8.1 .28 6.4 3.5 .32300054090014600 NAV Bed sediment (dredge) Bulk 10/05/2005 Set B 1.0 .5 .06 2.4 .93 .18300224090021901 H2 0–0.5 Bed sediment (box core) Bulk 9/21/2005 Set A 3.3 2.5 .33 7.0 3.5 .35

Table 3  13
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Total

carbon

(percent)

Total organic 

carbon

(percent)

Total

nitrogen

(percent)

Aluminum

(percent)

Iron

(percent)

Titanium

(percent)

Other suspended and bed sediment samples—Continued

300224090021901 H2 0.5–1 Bed sediment (box core) Bulk 9/21/2005 Set A 2.6 2.1 0.23 6.8 3.2 0.36300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A 2.2 1.8 .18 6.5 3.0 .35300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A 2.2 1.8 .18 6.6 3.0 .36300224090021901 H2 1–2 dup. Bed sediment (box core) Bulk 9/21/2005 Set A 2.3 1.8 .19 6.3 3.0 .35300224090021901 H2 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A 2.0 1.8 .16 6.3 2.8 .34300224090021901 H2 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A 2.0 1.6 .16 5.8 2.7 .32300224090021901 H2 4–5 Bed sediment (box core) Bulk 9/21/2005 Set A 2.2 1.8 .18 6.1 3.0 .35300224090021901 H2 0–1 Bed sediment (box core) Bulk 10/03/2005 Set B 2.4 1.9 .21 7.2 3.3 .37300224090021901 H2 1–2 Bed sediment (box core) Bulk 10/03/2005 Set B 2.2 1.7 .20 6.5 2.9 .33300224090021901 H2 2–3 Bed sediment (box core) Bulk 10/03/2005 Set B .5 .5 .04 3.7 1.2 .20300224090021901 H2 2–3 dup. Bed sediment (box core) Bulk 10/03/2005 Set B .5 .4 .04 3.7 1.2 .21300224090021901 H2 7–9 Bed sediment (box core) Bulk 10/03/2005 Set B 2.6 2.3 .23 8.1 3.8 .42300123090104301 D1 0–0.5 Bed sediment (box core) Bulk 10/09/2005 Set B 1.1 .9 .07 3.0 .83 .27300125090130801 C2 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 1.6 1.3 .13 6.5 2.9 .40300202090125901 C1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 3.3 2.8 .21 5.1 1.9 .32300214090130300 ELM Bed sediment (dredge) Bulk 9/26/2005 Set B 1.2 .9 .09 4.7 1.5 .33300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B .9 .8 .07 4.9 1.6 .36300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B .9 .8 .07 5.0 1.6 .38300214090130300 ELM Bed sediment (dredge) Bulk 9/30/2005 Set B 1.2 1.0 .07 4.3 1.3 .31300214090130300 ELM dup. Bed sediment (dredge) Bulk 9/30/2005 Set B 1.3 1.2 .08 4.8 1.7 .33300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B 1.1 .9 .08 4.8 1.6 .43300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B 1.8 1.7 .12 5.2 2.0 .39300236090144101 B1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 6.5 5.6 .43 6.4 2.9 .37300303090152601 A1 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B 2.1 1.8 .14 5.7 2.2 .35300445089565501 K1 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 2.1 1.6 .19 5.7 2.5 .32

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) Bulk 9/28/2005 Set B 1.4 1.9 .16 8.2 4.1 .42301151090075700 MID Bed sediment (dredge) Bulk 10/04/2005 Set B 1.7 1.8 .21 8.9 4.3 .44301151090075700 MID Bed sediment (dredge) Bulk 10/20/2005 Set B 1.6 1.6 .20 8.7 4.4 .42

14  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Total

carbon

(percent)

Total organic 

carbon

(percent)

Total

nitrogen

(percent)

Aluminum

(percent)

Iron

(percent)

Titanium

(percent)

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) Bulk 9/28/2005 Set B <.1 <0.1 <0.01 0.3 0.19 0.19

301001089442600 RGO Bed sediment (dredge) Bulk 10/21/2005 Set B <.1 <.1 <.01 .1 <.1 .02300403089481300 MNT Bed sediment (dredge) Bulk 9/28/2005 Set B <.1 <.1 <.01 1.2 .22 .05

300403089481300 MNT Bed sediment (dredge) Bulk 10/21/2005 Set B <.1 <.1 <.01 1.4 .31 .06Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - - - na na na na na naProbable effect concentration (PEC) - - - - - - na na na na na na

Quality-assurance samples

NIST 2709 - - - - Set A 1.2 na na 7.50±.06 3.5±.11 .342±.024NIST 2709 Found - - - - Set A 1.2 1.1 .11 7.4 3.4 .32NIST 2711 MT. Soil - - - - Set A 2.0 na na 6.53±.09 2.89±.06 .306±.023NIST 2711 MT. Soil Found - - - - Set A 2.0 1.8 .12 6.5 2.8 .29NIST 1646a - - - - Set A na na na 2.30±.02 2.00±.04 .46±.02NIST 1646a Found - - - - Set A .6 .6 .06 2.3 1.9 .44USGS SDO-1 - - - - Set A 9.95±.44 na .35±.04 6.49±.14 6.53±.15 .426±.019USGS SDO-1 Found - - - - Set A 1.0 9.8 .37 6.4 6.4 .41NIST 2709 - - - - Set B 1.2 na na 7.50±.06 3.5±.11 .342±.024NIST 2709 Found - - - - Set B 1.2 1.1 .11 7.4 3.4 .32NIST 2709 Found - - - - Set B 1.0 1.0 .11 7.5 3.4 .35NIST 2709 Found - - - - Set B 1.0 1.1 .09 7.4 3.5 .34NIST 2709 Found - - Set B 1.0 1.1 .11 7.5 3.4 .36NIST 2709 Found (average) - - Set B 1.1 1.1 .10 7.5 3.4 .34

Table 3  15
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Total

carbon

(percent)

Total organic 

carbon

(percent)

Total

nitrogen

(percent)

Aluminum

(percent)

Iron

(percent)

Titanium

(percent)

NIST 2711 MT. Soil - - - - Set B 2.0 na na 6.53±0.09 2.89±0.06 0.306±0.023NIST 2711 MT. Soil Found - - - - Set B 2.0 1.8 .12 6.5 2.8 .29NIST 2711 MT. Soil Found - - - - Set B 1.8 1.7 .13 6.6 2.8 .31NIST 2711 MT. Soil Found - - - - Set B 1.7 1.7 .12 6.6 2.9 .32NIST 2711 MT. Soil Found - - - - Set B 1.7 1.7 .13 6.7 2.8 .32NIST 2711 MT. Soil Found (average) - - - - Set B 1.8 1.7 .13 6.6 2.8 .31NIST 1646a - - - - Set B na na na 2.30±.02 2.00±.04 .46±.02NIST 1646a Found - - - - Set B .6 .6 .06 2.3 1.9 .44NIST 1646a Found - - - - Set B .6 .5 .06 2.3 2.0 .45NIST 1646a Found - - - - Set B .5 .5 .05 2.2 2.0 .44NIST 1646a Found - - - - Set B .5 .6 .07 2.3 1.9 .48NIST 1646a Found (average) - - - - Set B .6 .6 .06 2.3 2.0 .45USGS SDO-1 - - - - Set B 9.95±.44 na .35±.04 6.49±.14 6.53±.15 .426±.019USGS SDO-1 Found - - - - Set B 10 9.8 .37 6.4 6.4 .41USGS SDO-1 Found - - - - Set B 10 9.7 .36 6.3 6.3 .40USGS SDO-1 Found - - - - Set B 9.7 9.7 .38 6.4 6.4 .42USGS SDO-1 Found (average) - - - - Set B 9.9 9.7 .37 6.4 6.4 .41USGS MAG-1 - - - - Set B 2.15±.40 na na 8.66±.16 4.75±.21 .450±.040USGS MAG-1 Found - - - - Set B 2.3 2.2 .27 8.6 4.9 .42USGS MAG-1 Found - - - - Set B 2.2 2.2 .28 8.5 4.8 .43USGS MAG-1 Found - - - - Set B 2.2 2.3 .28 8.8 4.8 .46USGS MAG-1 Found (average) - - - - Set B 2.2 2.2 .28 8.6 4.8 .44USGS STM-1 - - - - Set B 0 na na 9.73±.12 3.65±.07 .081±.007USGS STM-1 Found - - - - Set B <.1 <.1 <.01 9.8 3.6 .08USGS STM-1 Found - - - - Set B <.1 <.1 <.01 9.7 3.6 .08

16  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Total

carbon

(percent)

Total organic 

carbon

(percent)

Total

nitrogen

(percent)

Aluminum

(percent)

Iron

(percent)

Titanium

(percent)

USGS STM-1 Found - - - - Set B <0.1 <0.1 <0.01 9.9 3.6 0.09USGS STM-1 Found (average) - - - - Set B <.1 <.1 <.01 9.8 3.6 .08USGS SGR-1 - - - - Set B 28 24.8 na 3.45±.11 2.12±.10 .152±.015USGS SGR-1 Found - - - - Set B 28 27 .85 3.5 2.1 .15USGS SGR-1 Found - - - - Set B 27 26 .90 3.3 2.1 .14USGS SGR-1 Found - - - - Set B 28 27 .88 3.6 2.0 .15USGS SGR-1 Found (average) - - - - Set B 28 27 .88 3.5 2.1 .15USGS SCO-1 - - - - Set B .81±.12 na na 7.23±.11 3.59±.13 .376±.039USGS SCO-1 Found - - - - Set B 1.0 .9 .05 7.1 3.5 .35USGS SCO-1 Found - - - - Set B .9 1.0 .05 7.2 3.6 .34USGS SCO-1 Found - - - - Set B .9 .9 .06 7.2 3.5 .36USGS SCO-1 Found (average) - - - - Set B .9 .9 .05 7.2 3.5 .35USGS QLO-1 - - - - Set B <.01 na na 8.56±.10 3.04±.10 .374±.020USGS QLO-1 Found - - - - Set B <.1 <.1 <.01 8.8 3.0 .38USGS QLO-1 Found - - - - Set B <.1 <.1 <.01 8.5 3.0 .38USGS QLO-1 Found - - - - Set B <.1 <.1 <.01 8.7 2.9 .39USGS QLO-1 Found (average) - - - - Set B <.1 <.1 <.01 8.7 3.0 .38USGS GSP-2 - - - - Set B na na na 7.88±.11 3.43±.11 .40±.01USGS GSP-2 Found - - - - Set B .1 .1 <.01 8.0 3.4 .40USGS GSP-2 Found - - - - Set B .2 <.1 <.01 7.9 3.4 .41USGS GSP-2 Found - - - - Set B <.1 .1 <.01 7.9 3.4 .41USGS GSP-2 Found (average) - - - - Set B .1 .1 <.01 7.9 3.4 .41

Table 3  17
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued. 

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Antmony Arsenic Barium Beryllium Cadmium Chromium

Zone E—17th Street Canal

300113090064901 NO1 Street mud Bulk 9/21/2005 Set A 1.5 16 650 2.0 1.0 70300113090064901 NO1 dup. Street mud Bulk 9/21/2005 Set A .8 11 630 1.9 .7 69300056090070301 FDL Street mud Bulk 10/03/2005 Set B 1.9 14 600 1.3 .4 44300125090071701 E1 Suspended sediment Bulk 9/20/2005 Set B 3.6 42 260 1.2 4.6 34300125090071701 E1 Suspended sediment Bulk 10/03/2005 Set B .9 23 390 1.5 5.0 62300136090072001 E2 Suspended sediment Bulk 9/20/2005 Set B 3.4 26 220 .9 2.1 33300125090074400 MET Bed sediment (dredge) Bulk 9/29/2005 Set B .7 6.3 670 1.1 .9 30300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 9/29/2005 Set B .9 8.3 640 1.1 1.3 37300125090074400 MET Bed sediment (dredge) Bulk 10/03/2005 Set B 1.9 21 530 1.7 2.7 70300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 10/03/2005 Set B 2.1 23 590 1.8 2.7 78300136090072001 E2 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A 1.6 18 660 1.3 3.0 50300136090072001 E2 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B .8 9.0 680 1.3 .9 49300144090072001 E3 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A 1.0 15 580 1.7 1.5 58300144090072001 E3 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 1.1 16 620 2.0 1.4 70300144090072001 E3 0–2 dup. Bed sediment (box core) Bulk 10/09/2005 Set B 1.0 16 600 1.9 1.5 71300202090071401 E4 0–1 Bed sediment (box core) Bulk 9/21/2005 Set A .9 14 650 2.3 1.1 80300202090071401 E4 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A .8 12 620 2.2 1.0 75300202090071401 E4 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A .9 14 610 2.1 1.0 73300202090071401 E4 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A .8 12 630 2.0 1.1 70300202090071401 E4 4–6 Bed sediment (box core) Bulk 9/21/2005 Set A .6 9.1 720 1.8 .9 64300202090071401 E4 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B .8 12 660 1.9 .6 69300143090081401 E5 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B .8 12 210 1.6 .5 50300114090083900 BON Bed sediment (dredge) Bulk 9/29/2005 Set B .4 3.5 660 1.0 .2 25300114090083900 BON dup. Bed sediment (dredge) Bulk 9/29/2005 Set B .4 3.4 670 1.0 .1 23

Zone G

—London Avenue Canal

300110090040401 CD Street mud Bulk 10/03/2005 Set B 1.5 16 360 2.1 1.9 88300152090042701 G1 Suspended sediment Bulk 10/03/2005 Set B .9 30 360 3.7 5.5 56

18  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued. 

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Antmony Arsenic Barium Beryllium Cadmium Chromium

Zone G—London Avenue Canal—Continued

300159090043001 G2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 0.5 2.6 370 0.5 0.2 20300205090043401 G3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .9 15 610 2.3 .8 85300205090043401 G3 0–1 dup. Bed sediment (box core) Bulk 10/10/2005 Set B .8 14 600 2.3 .7 85300243090043501 G4 0–2 Bed sediment (box core) Bulk 10/10/2005 Set B .8 13 750 2.3 .3 83300142090045800 STJ Bed sediment (dredge) Bulk 9/26/2005 Set B .4 3.5 580 .9 .2 28300142090045800 STJ Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B .5 3.4 670 1.1 .2 34

Zone J—Jahncke Canal

300355089571801 ONE Street mud Bulk 10/04/2005 Set B .5 5.1 630 1.1 .5 36300330089575801 JNK Suspended sediment Bulk 10/04/2005 Set B .1 3.5 98 .2 <.1 4.2300337089580701 J2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .1 1.4 390 .5 .1 11300344089581000 JNK Bed sediment (dredge) Bulk 9/27/2005 Set B .3 2.3 610 .9 .3 21300344089581000 JNK dup. Bed sediment (dredge) Bulk 9/27/2005 Set B .3 2.4 600 .9 .2 21300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 9/27/2005 Set B .6 5.8 660 1.4 .4 47300344089581000 JNK Bed sediment (dredge) Bulk 10/01/2005 Set B .8 4.1 520 .9 .8 34300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 10/01/2005 Set B 1.5 8.3 2,100 1.6 .7 69300344089581701 J3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .4 4.9 610 1.2 .3 39300342089584101 J7 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .5 8.3 430 1.4 .2 49300418089583801 J4 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .7 13 650 2.2 .3 77300313089591401 J5 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .3 3.4 610 1.0 .2 31

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment Bulk 9/21/2005 Set B .8 6.7 130 .3 .6 35295808090001601 CHL Suspended sediment Bulk 10/04/2005 Set B .3 11 310 .7 .6 32300018089562300 ITC Bed sediment (dredge) Bulk 9/29/2005 Set B .6 9.2 270 1.8 .2 59300018089562300 ITC Bed sediment (dredge) Bulk 10/05/2005 Set B .5 5.1 590 1.1 .2 36300018089562300 ITC Bed sediment (dredge) Sieved (<63 μm) 10/05/2005 Set B .7 6.9 740 1.6 .2 51300018089562300 ITC Bed sediment (dredge) Bulk 10/20/2005 Set B 1.0 18 270 1.8 .3 64300018089562300 ITC dup. Bed sediment (dredge) Bulk 10/20/2005 Set B 1.0 18 260 1.9 .4 68300054090014600 NAV Bed sediment (dredge) Bulk 10/05/2005 Set B .4 3.7 680 .6 .6 20300224090021901 H2 0–0.5 Bed sediment (box core) Bulk 9/21/2005 Set A 1.0 15 1,300 2.2 1.7 80

Table 3  19
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued. 

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Antmony Arsenic Barium Beryllium Cadmium Chromium

Other suspended and bed sediment samples—Continued

300224090021901 H2 0.5–1 Bed sediment (box core) Bulk 9/21/2005 Set A 0.6 10 1,100 2.0 0.5 70300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A .7 9.8 2,000 1.9 .5 67300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A .7 9.3 1,900 1.9 .5 68300224090021901 H2 1–2 dup. Bed sediment (box core) Bulk 9/21/2005 Set A .6 10 2,000 1.9 .4 66300224090021901 H2 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A .7 8.3 3,200 1.9 .5 65300224090021901 H2 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A .9 8.4 2,700 1.8 .5 66300224090021901 H2 4–5 Bed sediment (box core) Bulk 9/21/2005 Set A .9 8.7 2,000 1.9 .6 68300224090021901 H2 0–1 Bed sediment (box core) Bulk 10/03/2005 Set B .7 11 1,100 2.0 .4 73300224090021901 H2 1–2 Bed sediment (box core) Bulk 10/03/2005 Set B .7 9.8 1,100 1.8 .5 66300224090021901 H2 2–3 Bed sediment (box core) Bulk 10/03/2005 Set B .3 4.0 1,400 1.0 .1 29300224090021901 H2 2–3 dup. Bed sediment (box core) Bulk 10/03/2005 Set B .3 4.0 1,500 1.0 .1 30300224090021901 H2 7–9 Bed sediment (box core) Bulk 10/03/2005 Set B .8 13 800 2.3 .3 85300123090104301 D1 0–0.5 Bed sediment (box core) Bulk 10/09/2005 Set B .3 3.0 570 .7 <.1 23300125090130801 C2 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B .7 10 890 1.8 .2 66300202090125901 C1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B .6 6.9 740 1.4 .3 46300214090130300 ELM Bed sediment (dredge) Bulk 9/26/2005 Set B .5 5.4 730 1.2 .3 37300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B .5 5.2 850 1.2 .3 39300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B .6 5.3 920 1.2 .3 41300214090130300 ELM Bed sediment (dredge) Bulk 9/30/2005 Set B .5 5.0 820 1.1 .3 34300214090130300 ELM dup. Bed sediment (dredge) Bulk 9/30/2005 Set B .6 7.6 730 1.2 .4 41300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B .6 6.5 780 1.2 .2 43300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B .6 8.7 540 1.4 .4 48300236090144101 B1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B .8 11 660 1.8 .4 64300303090152601 A1 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B .7 7.2 1,000 1.5 .4 54300445089565501 K1 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B .6 9.0 550 1.6 <.2 57

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) Bulk 9/28/2005 Set B .6 14 470 2.3 .3 79301151090075700 MID Bed sediment (dredge) Bulk 10/04/2005 Set B .7 13 490 2.5 .3 87301151090075700 MID Bed sediment (dredge) Bulk 10/20/2005 Set B .9 14 490 2.5 .3 84

20 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued. 

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Antmony Arsenic Barium Beryllium Cadmium Chromium

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) Bulk 9/28/2005 Set B <0.2 0.7 54 0.2 <0.2 5.7

301001089442600 RGO Bed sediment (dredge) Bulk 10/21/2005 Set B .1 .1 17 <.1 <.1 <1

300403089481300 MNT Bed sediment (dredge) Bulk 9/28/2005 Set B .1 1.1 260 .3 <.1 4.5

300403089481300 MNT Bed sediment (dredge) Bulk 10/21/2005 Set B .2 1.4 290 .3 <.2 6.4Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - - - na 9.79 na na 1.0 43.4 Probable effect concentration (PEC) - - - - - - na 33 na na 4.98 111

Quality-assurance samples

NIST 2709 - - - - Set A 7.9±.6 17.7±.8 968±40 nd .4 130±4NIST 2709 Found - - - - Set A 7.8 19 950 5.4 .4 120NIST 2711 MT. Soil - - - - Set A 19.4±1.8 105±8 726±38 nd 41.70±.25 47NIST 2711 MT. Soil Found - - - - Set A 18.0 110 760 2.4 41 45NIST 1646a - - - - Set A .3 6.23±.21 210 <1 .2 41±2NIST 1646a Found - - - - Set A .1 6.4 220 1.1 .1 39USGS SDO-1 - - - - Set A 4.1–4.8 68.5±8.6 397±38 3.3±.6 nd 66.4±7.6USGS SDO-1 Found - - - - Set A 3.9 72 340 3.2 .1 67NIST 2709 - - - - Set B 7.9±.6 17.7±.8 968±40 nd .4 130±4NIST 2709 Found - - - - Set B 7.8 19 950 5.4 .4 120NIST 2709 Found - - - - Set B 7.5 19 1,000 5.4 .3 120NIST 2709 Found - - - - Set B 7.5 18 960 5.6 .3 120NIST 2709 Found - - - - Set B 7.7 19 990 5.4 .3 110NIST 2709 Found (average) - - - - Set B 7.6 19 975 5.5 .3 118

Table 3  21
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued. 

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Antmony Arsenic Barium Beryllium Cadmium Chromium

NIST 2711 MT. Soil - - - - Set B 19.4±1.8 105±8 726±38 nd 41.70±0.25 47NIST 2711 MT. Soil Found - - - - Set B 18 110 760 2.4 41 45NIST 2711 MT. Soil Found - - - - Set B 18 110 770 2.3 41 45NIST 2711 MT. Soil Found - - - - Set B 20 110 760 2.3 42 46NIST 2711 MT. Soil Found - - - - Set B 18 110 760 2.3 41 45NIST 2711 MT. Soil Found (average) - - - - Set B 19 110 763 2.3 41 45NIST 1646a - - - - Set B .3 6.23±.21 210 <1 .2 41±2NIST 1646a Found - - - - Set B .1 6.4 220 1.1 .1 39NIST 1646a Found - - - - Set B .2 6.4 220 .9 .1 40NIST 1646a Found - - - - Set B .4 6.4 210 .9 .1 39NIST 1646a Found - - - - Set B .2 6.5 220 .9 .1 38NIST 1646a Found (average) - - - - Set B .2 6.4 218 1.0 .1 39USGS SDO-1 - - - - Set B 4.1–4.8 68.5±8.6 397±38 3.3±.6 nd 66.4±7.6USGS SDO-1 Found - - - - Set B 3.9 72 340 3.2 .1 67USGS SDO-1 Found - - - - Set B 3.9 73 250 3.1 <.1 69USGS SDO-1 Found - - - - Set B 4.1 70 180 3.1 <.1 64USGS SDO-1 Found (average) - - - - Set B 4.0 72 257 3.1 .1 67USGS MAG-1 - - - - Set B .96±.10 9.2±1.2 479±41 3.2±.4 .2±.1 97±8USGS MAG-1 Found - - - - Set B .8 10 510 3.1 <.1 110USGS MAG-1 Found - - - - Set B 1.1 9.6 500 3.1 .1 100USGS MAG-1 Found - - - - Set B .9 11 520 3.2 .1 100USGS MAG-1 Found (average) - - - - Set B .9 10 510 3.1 .1 103USGS STM-1 - - - - Set B 1.66±.15 4.6±.6 560±60 9.6±.6 .27±.05 4.3±2.6USGS STM-1 Found - - - - Set B 1.4 5.3 610 9.9 .2 4USGS STM-1 Found - - - - Set B 1.8 4.9 610 9.7 .2 3

22 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued. 

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Antmony Arsenic Barium Beryllium Cadmium Chromium

USGS STM-1 Found - - - - Set B 1.4 5.0 610 9.8 0.2 3USGS STM-1 Found (average) - - - - Set B 1.5 5.1 610 9.8 .2 4USGS SGR-1 - - - - Set B 3.4±.5 67±5 290±40 1.06±.16 .93±.05 30±3USGS SGR-1 Found - - - - Set B 2.8 71 290 1.1 .9 34USGS SGR-1 Found - - - - Set B 3.2 71 290 1.0 1.0 30USGS SGR-1 Found - - - - Set B 3.0 69 330 1.1 1.0 32USGS SGR-1 Found (average) - - - - Set B 3.0 70 303 1.1 1.0 32USGS SCO-1 - - - - Set B 2.5±.1 12.4±1.4 570±30 1.84±.20 .1 68±5USGS SCO-1 Found - - - - Set B 2.3 14 600 1.8 .1 69USGS SCO-1 Found - - - - Set B 2.6 14 600 1.8 .1 70USGS SCO-1 Found - - - - Set B 2.4 13 610 1.8 .1 69USGS SCO-1 Found (average) - - - - Set B 2.4 14 603 1.8 .1 69USGS QLO-1 - - - - Set B 2.1±.4 3.5±1.8 1,370±80 1.89±.17 .05? 3.2±1.7USGS QLO-1 Found - - - - Set B 1.8 1.7 1,500 2.0 <.1 5USGS QLO-1 Found - - - - Set B 2.0 1.4 1,400 1.9 <.1 2USGS QLO-1 Found - - - - Set B 1.6 1.9 1,500 1.9 <.1 3USGS QLO-1 Found (average) - - - - Set B 1.8 1.7 1,467 1.9 <.1 3USGS GSP-2 - - - - Set B nd nd 1,340±44 1.5±.2 nd 20±6

USGS GSP-2 Found - - - - Set B .3 1.4 1,400 1.6 <.1 21

USGS GSP-2 Found - - - - Set B .4 1.4 1,400 1.6 .1 18USGS GSP-2 Found - - - - Set B .4 1.4 1,400 1.6 <.1 21USGS GSP-2 Found (average) - - - - Set B .4 1.4 1,400 1.6 <.1 20

Table 3  23
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Cobalt Copper Lead Lithium Manga- nese Mercury

Zone E—17th Street Canal

300113090064901 NO1 Street mud Bulk 9/21/2005 Set A 12 36 61 38 770 0.13300113090064901 NO1 dup. Street mud Bulk 9/21/2005 Set A 12 36 60 37 750 .09300056090070301 FDL Street mud Bulk 10/03/2005 Set B 7.2 47 170 20 280 .15300125090071701 E1 Suspended sediment Bulk 9/20/2005 Set B 17 170 170 13 420 .19300125090071701 E1 Suspended sediment Bulk 10/03/2005 Set B 26 48 75 29 2,000 .17300136090072001 E2 Suspended sediment Bulk 9/20/2005 Set B 9.8 110 120 15 1,100 .15300125090074400 MET Bed sediment (dredge) Bulk 9/29/2005 Set B 6.0 32 120 15 260 .14300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 9/29/2005 Set B 6.3 32 120 17 320 .15300125090074400 MET Bed sediment (dredge) Bulk 10/03/2005 Set B 12 92 210 32 640 .32300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 10/03/2005 Set B 13 110 230 34 690 .41300136090072001 E2 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A 9.6 87 200 21 360 .28300136090072001 E2 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B 7.7 28 70 20 390 .11300144090072001 E3 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A 13 47 71 29 1,200 .15300144090072001 E3 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 13 54 86 36 830 .23300144090072001 E3 0–2 dup. Bed sediment (box core) Bulk 10/09/2005 Set B 12 53 86 36 830 .19300202090071401 E4 0–1 Bed sediment (box core) Bulk 9/21/2005 Set A 15 40 53 47 930 .09300202090071401 E4 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A 15 39 52 42 1,100 .09300202090071401 E4 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A 15 36 49 41 1,000 .10300202090071401 E4 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A 13 34 47 39 940 .11300202090071401 E4 4–6 Bed sediment (box core) Bulk 9/21/2005 Set A 12 22 32 35 630 .07300202090071401 E4 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 13 29 38 37 1,000 .09300143090081401 E5 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 10 18 14 24 410 <.02300114090083900 BON Bed sediment (dredge) Bulk 9/29/2005 Set B 5.5 6.8 25 12 220 .03300114090083900 BON dup. Bed sediment (dredge) Bulk 9/29/2005 Set B 5.4 7.4 26 12 220 .03

Zone G

—London Avenue Canal

300110090040401 CD Street mud Bulk 10/03/2005 Set B 13 68 220 42 450 .36300152090042701 G1 Suspended sediment Bulk 10/03/2005 Set B 27 52 110 29 1,400 .17

24  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Cobalt Copper Lead Lithium Manga- nese Mercury

Zone G—London Avenue Canal—Continued

300159090043001 G2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 3.5 5.4 17 8.7 210 0.02

300205090043401 G3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 16 36 50 48 2,000 .09300205090043401 G3 0–1 dup. Bed sediment (box core) Bulk 10/10/2005 Set B 16 37 52 47 2,000 .07300243090043501 G4 0–2 Bed sediment (box core) Bulk 10/10/2005 Set B 15 27 35 47 1,400 .08300142090045800 STJ Bed sediment (dredge) Bulk 9/26/2005 Set B 4.7 11 24 13 230 .03300142090045800 STJ Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B 5.1 10 26 15 280 .03

Zone J—Jahncke Canal

300355089571801 ONE Street mud Bulk 10/04/2005 Set B 6.6 14 22 17 170 .02300330089575801 JNK Suspended sediment Bulk 10/04/2005 Set B 1.3 <1 1.7 5.8 340 .02300337089580701 J2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 2.5 1.7 7.8 5.5 75 <.01300344089581000 JNK Bed sediment (dredge) Bulk 9/27/2005 Set B 4.8 4.5 11 11 160 <.02300344089581000 JNK dup. Bed sediment (dredge) Bulk 9/27/2005 Set B 4.3 4.4 12 11 160 .01300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 9/27/2005 Set B 7.7 15 17 19 410 .10300344089581000 JNK Bed sediment (dredge) Bulk 10/01/2005 Set B 5.7 30 22 19 380 .05300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 10/01/2005 Set B 9.7 60 38 33 700 .16300344089581701 J3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 7.0 11 16 20 450 .03300342089584101 J7 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 9.2 15 18 28 1,100 .05300418089583801 J4 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 14 23 28 45 1,500 .19300313089591401 J5 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 5.2 6.1 12 15 420 .12

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment Bulk 9/21/2005 Set B 6.4 7.8 17 7.6 6,300 is295808090001601 CHL Suspended sediment Bulk 10/04/2005 Set B 4.2 14 17 17 1,300 .04300018089562300 ITC Bed sediment (dredge) Bulk 9/29/2005 Set B 10 17 18 36 790 <.01300018089562300 ITC Bed sediment (dredge) Bulk 10/05/2005 Set B 6.9 10 12 18 360 .01300018089562300 ITC Bed sediment (dredge) Sieved (<63 μm) 10/05/2005 Set B 9.3 16 17 27 530 .06300018089562300 ITC Bed sediment (dredge) Bulk 10/20/2005 Set B 11 26 16 41 910 .04300018089562300 ITC dup. Bed sediment (dredge) Bulk 10/20/2005 Set B 11 28 15 41 940 .02300054090014600 NAV Bed sediment (dredge) Bulk 10/05/2005 Set B 3.5 16 23 11 200 .06300224090021901 H2 0–0.5 Bed sediment (box core) Bulk 9/21/2005 Set A 14 38 46 47 800 .10

Table 3  25
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Cobalt Copper Lead Lithium Manga- nese Mercury

Other suspended and bed sediment samples­—Continued

300224090021901 H2 0.5–1 Bed sediment (box core) Bulk 9/21/2005 Set A 13 27 38 42 790 .07300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A 12 27 40 39 710 .07300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A 12 26 39 39 730 .08300224090021901 H2 1–2 dup. Bed sediment (box core) Bulk 9/21/2005 Set A 12 27 40 39 690 .07300224090021901 H2 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A 11 30 42 36 690 .10300224090021901 H2 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A 11 34 38 36 670 .11300224090021901 H2 4–5 Bed sediment (box core) Bulk 9/21/2005 Set A 12 37 39 39 710 .09300224090021901 H2 0–1 Bed sediment (box core) Bulk 10/03/2005 Set B 13 26 37 41 1,300 .06300224090021901 H2 1–2 Bed sediment (box core) Bulk 10/03/2005 Set B 11 23 33 37 1,100 .05300224090021901 H2 2–3 Bed sediment (box core) Bulk 10/03/2005 Set B 5.2 8.4 19 15 400 .02300224090021901 H2 2–3 dup. Bed sediment (box core) Bulk 10/03/2005 Set B 5.1 8.3 16 15 390 .03300224090021901 H2 7–9 Bed sediment (box core) Bulk 10/03/2005 Set B 15 30 41 48 1,000 .06300123090104301 D1 0–0.5 Bed sediment (box core) Bulk 10/09/2005 Set B 4.1 5.3 12 10 280 <.01300125090130801 C2 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 12 19 22 35 740 .07300202090125901 C1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 7.4 16 27 23 490 .04300214090130300 ELM Bed sediment (dredge) Bulk 9/26/2005 Set B 6.1 11 23 18 350 .07300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B 6.1 12 24 19 360 .09300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B 6.1 12 25 19 360 .07300214090130300 ELM Bed sediment (dredge) Bulk 9/30/2005 Set B 6.0 10 24 16 310 .05300214090130300 ELM dup. Bed sediment (dredge) Bulk 9/30/2005 Set B 6.9 16 33 20 420 .04300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B 6.2 12 25 18 380 .06300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B 7.7 19 32 22 480 .09300236090144101 B1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 11 24 29 35 830 .05300303090152601 A1 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B 9.1 17 26 28 580 .06300445089565501 K1 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B 11 19 22 32 2,100 .04

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) Bulk 9/28/2005 Set B 14 24 27 50 1,500 .05301151090075700 MID Bed sediment (dredge) Bulk 10/04/2005 Set B 16 25 28 54 1,700 .06301151090075700 MID Bed sediment (dredge) Bulk 10/20/2005 Set B 16 25 28 58 1,600 .06

26  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Cobalt Copper Lead Lithium Manga- nese Mercury

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) Bulk 9/28/2005 Set B <2 <2 3.0 2.2 48 <0.01301001089442600 RGO Bed sediment (dredge) Bulk 10/21/2005 Set B <1 <1 1.4 2.0 8.1 <.02300403089481300 MNT Bed sediment (dredge) Bulk 9/28/2005 Set B <1 <1 4.6 3.2 38 <.01300403089481300 MNT Bed sediment (dredge) Bulk 10/21/2005 Set B 2.5 1.2 6.0 5.3 65 .02Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - - - na 31.6 35.8 na na .18 Probable effect concentration (PEC) - - - - - - na 149 128 na na 1.06

Quality-assurance samples

NIST 2709 - - - - Set A 13.4±.7 34.6±.7 18.9±.5 nd 538±17 1.40±.08NIST 2709 Found - - - - Set A 14 33 20 53 550 1.5NIST 2711 MT. Soil - - - - Set A 10 114±2 1,162±31 nd 638±28 6.25±.19NIST 2711 MT. Soil Found - - - - Set A 11 110 1,100 28 640 6.1NIST 1646a - - - - Set A 5 10±.34 12±1 17 234±3 .04NIST 1646a Found - - - - Set A 5.3 10 11 18 230 .05USGS SDO-1 - - - - Set A 46.8±6.3 60.2±9.6 27.9±5.2 28.6±5.5 325±39 .19±.08USGS SDO-1 Found - - - - Set A 50 56 25 33 310 .17NIST 2709 - - - - Set B 13.4±.7 34.6±.7 18.9±.5 nd 538±17 1.40±.08NIST 2709 Found - - - - Set B 14 33 20 53 550 1.5NIST 2709 Found - - - - Set B 14 33 18 52 520 1.4NIST 2709 Found - - - - Set B 14 32 19 54 530 1.40NIST 2709 Found - - - - Set B 13 33 20 51 530 1.4NIST 2709 Found (average) - - - - Set B 14 33 19 53 533 1.4

Table 3  27
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Cobalt Copper Lead Lithium Manga- nese Mercury

NIST 2711 MT. Soil - - - - Set B 10 114±2 1,162±31 nd 638±28 6.25±0.19NIST 2711 MT. Soil Found - - - - Set B 11 110 1,100 28 640 6.1NIST 2711 MT. Soil Found - - - - Set B 11 120 1,200 27 630 6.1NIST 2711 MT. Soil Found - - - - Set B 11 110 1,200 29 630 6.1NIST 2711 MT. Soil Found - - - - Set B 10 110 1,200 27 620 6.2NIST 2711 MT. Soil Found (average) - - - - Set B 11 113 1,175 28 630 6.1NIST 1646a - - - - Set B 5.0 10±.34 12±1 17 234±3 .04NIST 1646a Found - - - - Set B 5.3 10 11 18 230 .05NIST 1646a Found - - - - Set B 5.0 10 12 17 230 .04NIST 1646a Found - - - - Set B 4.9 10 11 18 230 .04NIST 1646a Found - - - - Set B 4.4 10 10 17 230 .04NIST 1646a Found (average) - - - - Set B 4.9 10 11 18 230 .04USGS SDO-1 - - - - Set B 46.8±6.3 60.2±9.6 27.9±5.2 28.6±5.5 325±39 .19±.08USGS SDO-1 Found - - - - Set B 50 56 25 33 310 .17USGS SDO-1 Found - - - - Set B 48 57 24 31 310 .20USGS SDO-1 Found - - - - Set B 46 53 22 30 290 .16USGS SDO-1 Found (average) - - - - Set B 48 55 24 31 303 .18USGS MAG-1 - - - - Set B 20.4±1.6 30±3 24±3 79±4 760±70 .02USGS MAG-1 Found - - - - Set B 22 27 26 80 690 .06USGS MAG-1 Found - - - - Set B 23 26 26 80 710 .05USGS MAG-1 Found - - - - Set B 22 26 25 78 730 .03USGS MAG-1 Found (average) - - - - Set B 22 26 26 79 710 .05USGS STM-1 - - - - Set B .90±.15 4.6±2.0 17.7±1.8 32±8 1,700±120 .02USGS STM-1 Found - - - - Set B <1 2.3 17 38 1,600 .02USGS STM-1 Found - - - - Set B <1 3.0 16 40 1,600 .07

28  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Cobalt Copper Lead Lithium Manga- nese Mercury

USGS STM-1 Found - - - - Set B <1 1.7 16 38 1,600 0.01USGS STM-1 Found (average) - - - - Set B <1 2.3 16 39 1,600 .03USGS SGR-1 - - - - Set B 11.8±1.5 66±9 38±4 147±26 267±34 .31USGS SGR-1 Found - - - - Set B 12 65 42 140 240 .19USGS SGR-1 Found - - - - Set B 11 57 37 130 230 .21USGS SGR-1 Found - - - - Set B 11 59 40 130 230 .25USGS SGR-1 Found (average) - - - - Set B 11 60 40 133 233 .22USGS SCO-1 - - - - Set B 10.5±.8 28.7±1.9 31±3 45±3 408±30 .05USGS SCO-1 Found - - - - Set B 12 26 30 44 380 .08USGS SCO-1 Found - - - - Set B 12 27 31 47 380 .09USGS SCO-1 Found - - - - Set B 11 26 31 43 370 .06USGS SCO-1 Found (average) - - - - Set B 12 26 31 45 377 .08USGS QLO-1 - - - - Set B 7.2±.5 29±3 20.4±.8 25±2 721±49 .01USGS QLO-1 Found - - - - Set B 8.0 26 22 27 730 .02USGS QLO-1 Found - - - - Set B 8.2 26 20 28 680 .02USGS QLO-1 Found - - - - Set B 7.4 26 18 25 680 <.01USGS QLO-1 Found (average) - - - - Set B 7.9 26 20 27 697 .02USGS GSP-2 - - - - Set B 7±1 43±4 42±3 36±1 320±20 ndUSGS GSP-2 Found - - - - Set B 8.0 47 42 37 320 .02USGS GSP-2 Found - - - - Set B 7.7 45 40 38 300 .04USGS GSP-2 Found - - - - Set B 7.3 46 43 36 320 .02USGS GSP-2 Found (average) - - - - Set B 7.7 46 42 37 313 .03

Table 3  29
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Molybdenum Nickel Phos- phorus Selenium Silver Stron- tium Vana- dium Zinc

Zone E—17th Street Canal

300113090064901 NO1 Street mud Bulk 9/21/2005 Set A <2.0 31 790 1.3 2.1 140 110 250300113090064901 NO1 dup. Street mud Bulk 9/21/2005 Set A <2.0 31 780 1.1 <1.0 140 110 240300056090070301 FDL Street mud Bulk 10/03/2005 Set B <2.0 20 1,000 .9 <1.0 190 69 180300125090071701 E1 Suspended sediment Bulk 9/20/2005 Set B 2.7 24 5,700 2.3 2.7 200 51 2,000300125090071701 E1 Suspended sediment Bulk 10/03/2005 Set B <3.0 27 2,400 1.4 20 170 86 640300136090072001 E2 Suspended sediment Bulk 9/20/2005 Set B <2.0 18 3,600 1.9 1.1 180 51 840300125090074400 MET Bed sediment (dredge) Bulk 9/29/2005 Set B <2.0 12 590 .3 <1.0 200 38 340300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 9/29/2005 Set B <2.0 15 730 .4 1.0 190 47 470300125090074400 MET Bed sediment (dredge) Bulk 10/03/2005 Set B 1.7 31 1,100 1.4 1.1 170 92 1,800300125090074400 MET Bed sediment (dredge) Sieved (<63 μm) 10/03/2005 Set B 1.8 54 1,200 1.4 <1.0 160 100 2,000300136090072001 E2 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A 1.5 23 970 1.0 1.9 170 62 1,200300136090072001 E2 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B <2.0 16 630 .3 <1.0 190 59 380300144090072001 E3 0–2 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 34 840 1.8 2.2 150 87 290300144090072001 E3 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B .73 30 960 1.3 <1.0 170 110 640300144090072001 E3 0–2 dup. Bed sediment (box core) Bulk 10/09/2005 Set B .76 30 950 1.2 <1.0 170 110 650300202090071401 E4 0–1 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 37 940 1.2 <1.0 130 130 230300202090071401 E4 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 37 860 1.3 1.6 140 120 170300202090071401 E4 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 35 850 1.2 <1.0 140 120 160300202090071401 E4 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 33 830 1.1 1.1 140 110 140300202090071401 E4 4–6 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 27 720 .7 <1.0 150 95 110300202090071401 E4 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B <2.0 29 790 1.2 1.3 160 110 150300143090081401 E5 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B 1.9 26 550 1.6 1.4 170 87 96300114090083900 BON Bed sediment (dredge) Bulk 9/29/2005 Set B <2.0 12 470 .2 <1.0 200 32 83300114090083900 BON dup. Bed sediment (dredge) Bulk 9/29/2005 Set B <1.0 12 460 .1 <.5 200 32 81

Zone G

—London Avenue Canal

300110090040401 CD Street mud Bulk 10/03/2005 Set B 1.6 34 820 1.1 <1.0 140 120 840300152090042701 G1 Suspended sediment Bulk 10/03/2005 Set B <2.0 51 3,200 2.1 11 160 90 1,000

30 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Molybdenum Nickel Phos- phorus Selenium Silver Stron- tium Vana- dium Zinc

Zone G—London Avenue Canal—Contiued

300159090043001 G2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <2.0 4.5 220 0.2 <1.0 88 22 52300205090043401 G3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <2.0 35 1,000 .8 <1.0 150 140 290300205090043401 G3 0–1 dup. Bed sediment (box core) Bulk 10/10/2005 Set B <2.0 35 990 .9 <1.0 140 140 280300243090043501 G4 0–2 Bed sediment (box core) Bulk 10/10/2005 Set B <2.0 33 860 .5 1.0 150 140 170300142090045800 STJ Bed sediment (dredge) Bulk 9/26/2005 Set B <2.0 8.4 470 .2 <1.0 160 33 62300142090045800 STJ Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B <1.0 10 620 .2 <.5 190 43 72

Zone J—Jahncke Canal

300355089571801 ONE Street mud Bulk 10/04/2005 Set B <1.0 12 580 .2 .5 190 47 180300330089575801 JNK Suspended sediment Bulk 10/04/2005 Set B <1.0 3.2 1,000 .2 <.5 250 4.8 50300337089580701 J2 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <1.0 1.5 150 <.1 <.5 100 12 18300344089581000 JNK Bed sediment (dredge) Bulk 9/27/2005 Set B <1.0 7.3 360 .1 <.5 180 29 54300344089581000 JNK dup. Bed sediment (dredge) Bulk 9/27/2005 Set B <2.0 7.3 350 <.2 <1.0 180 28 55300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 9/27/2005 Set B <3.0 15 850 .4 <1.5 210 64 160300344089581000 JNK Bed sediment (dredge) Bulk 10/01/2005 Set B <2.0 12 380 .4 <1.0 220 42 150300344089581000 JNK Bed sediment (dredge) Sieved (<63 μm) 10/01/2005 Set B 2.9 24 700 .7 <1.0 260 82 230300344089581701 J3 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <1.0 13 600 .1 .7 180 57 99300342089584101 J7 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <2.0 19 560 .6 <1.0 100 80 100300418089583801 J4 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <2.0 31 840 .3 <1.0 140 130 150300313089591401 J5 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <1.0 9.0 490 <.1 1.0 180 41 46

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment Bulk 9/21/2005 Set B <2.0 12 1,700 3.5 <1.0 180 22 110295808090001601 CHL Suspended sediment Bulk 10/04/2005 Set B <2.0 13 1,800 .8 <.5 210 44 320300018089562300 ITC Bed sediment (dredge) Bulk 9/29/2005 Set B 1.1 24 660 .8 .6 150 95 88300018089562300 ITC Bed sediment (dredge) Bulk 10/05/2005 Set B <2.0 17 450 .3 <1.0 140 54 65300018089562300 ITC Bed sediment (dredge) Sieved (<63 μm) 10/05/2005 Set B <2.0 23 650 .5 <1.0 180 80 97300018089562300 ITC Bed sediment (dredge) Bulk 10/20/2005 Set B 3.0 28 710 .8 <1.0 140 110 120300018089562300 ITC dup. Bed sediment (dredge) Bulk 10/20/2005 Set B 3.1 29 740 .8 <1.0 140 110 120300054090014600 NAV Bed sediment (dredge) Bulk 10/05/2005 Set B <2.0 7.4 220 .2 <1.0 220 27 84300224090021901 H2 0–0.5 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 33 810 1.4 <1.0 130 130 900

Table 3  31
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Molybdenum Nickel Phos- phorus Selenium Silver Stron- tium Vana- dium Zinc

Other suspended and bed sediment samples—Continued

300224090021901 H2 0.5–1 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 30 850 0.9 <1.0 140 110 220300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 28 870 .6 <1.0 150 100 140300224090021901 H2 1–2 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 28 890 .7 <1.0 150 100 140300224090021901 H2 1–2 dup. Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 27 840 .5 <1.0 150 100 140300224090021901 H2 2–3 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 27 810 .6 <1.0 170 97 150300224090021901 H2 3–4 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 26 690 .4 <1.0 180 96 170300224090021901 H2 4–5 Bed sediment (box core) Bulk 9/21/2005 Set A <2.0 29 770 .7 <1.0 190 100 170300224090021901 H2 0–1 Bed sediment (box core) Bulk 10/03/2005 Set B <2.0 29 770 .7 .7 140 120 170300224090021901 H2 1–2 Bed sediment (box core) Bulk 10/03/2005 Set B <2.0 25 720 .6 <1.0 140 100 180300224090021901 H2 2–3 Bed sediment (box core) Bulk 10/03/2005 Set B <1.0 10 310 .2 <.5 140 43 69300224090021901 H2 2–3 dup. Bed sediment (box core) Bulk 10/03/2005 Set B <1.0 10 300 .1 <.5 140 43 75300224090021901 H2 7–9 Bed sediment (box core) Bulk 10/03/2005 Set B <2.0 34 810 .7 <1.0 140 140 150300123090104301 D1 0–0.5 Bed sediment (box core) Bulk 10/09/2005 Set B <1.0 5.8 400 .2 <.5 160 27 38300125090130801 C2 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B <2.0 25 740 .5 <1.0 170 100 100300202090125901 C1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B <2.0 17 660 .6 <1.0 190 67 93300214090130300 ELM Bed sediment (dredge) Bulk 9/26/2005 Set B <1.0 14 590 .3 <.5 200 50 99300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B <1.0 14 640 .3 <.5 190 54 100300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/26/2005 Set B <1.0 14 650 .3 <.5 200 54 97300214090130300 ELM Bed sediment (dredge) Bulk 9/30/2005 Set B <1.0 13 560 .3 <.5 190 44 90300214090130300 ELM dup. Bed sediment (dredge) Bulk 9/30/2005 Set B .84 16 600 .4 1.2 180 58 140300214090130300 ELM Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B <2.0 15 740 .3 <1.0 200 55 110300214090130300 ELM dup. Bed sediment (dredge) Sieved (<63 μm) 9/30/2005 Set B <2.0 18 690 .5 <1.0 190 65 160300236090144101 B1 0–2 Bed sediment (box core) Bulk 10/09/2005 Set B <2.0 27 780 1.1 <1.0 160 100 140300303090152601 A1 0–1 Bed sediment (box core) Bulk 10/09/2005 Set B <1.0 20 570 .7 <.5 190 78 92300445089565501 K1 0–1 Bed sediment (box core) Bulk 10/10/2005 Set B <2.0 22 660 .5 <1.0 140 91 95

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) Bulk 9/28/2005 Set B .9 34 660 .7 <.5 110 140 130301151090075700 MID Bed sediment (dredge) Bulk 10/04/2005 Set B <2.0 37 700 .7 <1.0 110 150 140301151090075700 MID Bed sediment (dredge) Bulk 10/20/2005 Set B 3.4 37 740 .6 <.5 120 150 140

32 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Molybdenum Nickel Phos- phorus Selenium Silver Stron- tium Vana- dium Zinc

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) Bulk 9/28/2005 Set B <2.0 <2 48 <0.2 <1.0 16 7.9 5.9301001089442600 RGO Bed sediment (dredge) Bulk 10/21/2005 Set B <1.0 1.1 16 <.1 .5 3.4 <1 1.6

300403089481300 MNT Bed sediment (dredge) Bulk 9/28/2005 Set B <1.0 2.1 85 <.1 .6 56 6.0 6.0

300403089481300 MNT Bed sediment (dredge) Bulk 10/21/2005 Set B <2.0 4.9 100 <.2 <1.0 77 9.1 10Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - - - na 22.7 na na na na na 121 Probable effect concentration (PEC) - - - - - - na 48.6 na na na na na 459

Quality-assurance samples

NIST 2709 - - - - Set A 2.0 88±5 620±50 1.57±.08 .41±.03 231±2 112±5 106±3NIST 2709 Found - - - - Set A 2.0 85 620 1.6 <.5 230 110 110NIST 2711 MT. Soil - - - - Set A 1.6 20.6±1.1 860±70 1.52±.14 4.63±.39 245.3±.7 81.6±2.9 350.4±4.8NIST 2711 MT. Soil Found - - - - Set A 1.4 20 820 1.4 4.8 240 80 360NIST 1646a - - - - Set A 1.8 23 270±10 .19±.03 <.3 68 45±1 49±2NIST 1646a Found - - - - Set A 1.4 22 270 .2 <.5 70 43 48USGS SDO-1 - - - - Set A 134±21 99.5±9.9 480±31 1.9–6.8 .1–.2 75.1±11 160±21 64.1±6.9USGS SDO-1 Found - - - - Set A 150 92 490 1.9 <.5 80 160 60NIST 2709 - - - - Set B 2.0 88±5 620±50 1.57±.08 .41±.03 231±2 112±5 106±3NIST 2709 Found - - - - Set B 2.0 85 620 1.6 <.5 230 110 110NIST 2709 Found - - - - Set B 1.4 85 600 1.6 <.5 240 110 110NIST 2709 Found - - - - Set B 3.0 89 630 1.6 <.5 240 110 110NIST 2709 Found - - - - Set B 1.9 88 620 1.6 <.5 240 110 110NIST 2709 Found (average) - - - - Set B 2.1 87 618 1.6 <.5 238 110 110

Table 3  33
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Molybdenum Nickel Phos- phorus Selenium Silver Stron- tium Vana- dium Zinc

NIST 2711 MT. Soil - - - - Set B 1.6 20.6±1.1 860±70 1.52±0.14 4.63±0.39 245.3±0.7 81.6±2.9 350.4±4.8NIST 2711 MT. Soil Found - - - - Set B 1.4 20 820 1.4 4.8 240 80 360NIST 2711 MT. Soil Found - - - - Set B 1.0 19 810 1.4 4.3 250 80 350NIST 2711 MT. Soil Found - - - - Set B 2.0 20 860 1.4 4.9 250 83 360NIST 2711 MT. Soil Found - - - - Set B 1.6 19 800 1.4 4.2 250 79 350NIST 2711 MT. Soil Found (average) - - - - Set B 1.5 20 823 1.4 4.6 248 81 355NIST 1646a - - - - Set B 1.8 23 270±10 .19±.03 <.3 68 45±1 49±2NIST 1646a Found - - - - Set B 1.4 22 270 .2 <.5 70 43 48NIST 1646a Found - - - - Set B 1.2 21 260 .1 <.5 73 44 48NIST 1646a Found - - - - Set B 1.8 21 290 .2 <.5 70 44 50NIST 1646a Found - - - - Set B 1.8 21 260 .2 <.5 70 43 47NIST 1646a Found (average) - - - - Set B 1.6 21 270 .2 <.5 71 44 48USGS SDO-1 - - - - Set B 134±21 99.5±9.9 480±31 1.9–6.8 .1–.2 75.1±11 160±21 64.1±6.9USGS SDO-1 Found - - - - Set B 150 92 490 1.9 <.5 80 160 60USGS SDO-1 Found - - - - Set B 150 91 480 2.0 <.5 85 160 71USGS SDO-1 Found - - - - Set B 140 91 460 1.9 <.5 80 150 67USGS SDO-1 Found (average) - - - - Set B 147 91 477 1.9 <.5 82 157 66USGS MAG-1 - - - - Set B 1.6±.6 53±8 710±90 1.16±.12 .1 146±15 140±6 130±6USGS MAG-1 Found - - - - Set B <1.0 47 700 1.3 <.5 150 140 140USGS MAG-1 Found - - - - Set B 2.0 47 750 1.2 <.5 150 140 140USGS MAG-1 Found - - - - Set B 1.0 48 710 1.3 <.5 150 140 140USGS MAG-1 Found (average) - - - - Set B 1.5 47 720 1.3 <.5 150 140 140USGS STM-1 - - - - Set B 5.2±.9 3.0±1.6 690±60 .008±.002 .1 700±30 8.7±5.2 235±22USGS STM-1 Found - - - - Set B 4.9 <1 690 <.1 <.5 700 1.2 260USGS STM-1 Found - - - - Set B 6.0 2.1 730 <.1 <.5 700 3.0 260

34  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 3. Major and trace element concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005—

Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample

type

Sediment

analyzed

Sample

date

Sample

set

number

Molybdenum Nickel Phos- phorus Selenium Silver Stron- tium Vana- dium Zinc

USGS STM-1 Found - - - - Set B 5.0 1.7 700 <0.1 <0.5 680 3.0 250USGS STM-1 Found (average) - - - - Set B 5.3 1.9 707 <.1 <.5 693 2.4 257USGS SGR-1 - - - - Set B 35.1±.9 29±5 1,430±290 3.5±.28 .01–.20 420±30 128±6 74±9USGS SGR-1 Found - - - - Set B 33 27 1,200 3.8 <.5 410 130 80USGS SGR-1 Found - - - - Set B 32 26 1,200 3.2 <.5 390 120 79USGS SGR-1 Found - - - - Set B 33 27 1,200 3.7 <.5 390 120 75USGS SGR-1 Found (average) - - - - Set B 33 27 1,200 3.6 <.5 397 123 78USGS SCO-1 - - - - Set B 1.37±.16 27±4 900±90 .89±.06 .1 174±16 131±13 103±8USGS SCO-1 Found - - - - Set B <1 23 890 .8 .5 180 130 110USGS SCO-1 Found - - - - Set B 2.0 24 930 .9 <.5 180 130 110USGS SCO-1 Found - - - - Set B 1.2 24 870 1.0 <.5 180 130 100USGS SCO-1 Found (average) - - - - Set B 1.6 24 897 .9 <.5 180 130 107USGS QLO-1 - - - - Set B 2.6±.3 5.8±3.6 1,110±70 .009±.002 .1 336±12 54±6 61±3USGS QLO-1 Found - - - - Set B 2.4 <1 1,200 <.1 <.5 350 51 65USGS QLO-1 Found - - - - Set B 3.0 3.0 1,200 <.1 <.5 340 49 65USGS QLO-1 Found - - - - Set B 3.1 3.0 1,100 <.1 <.5 330 48 63USGS QLO-1 Found (average) - - - - Set B 2.8 3.0 1,167 <.1 <.5 340 49 64USGS GSP-2 - - - - Set B 2.1±.6 17±2 1,300±100 nd nd 240±10 52±4 120±10USGS GSP-2 Found - - - - Set B 1.6 15 1,300 <.1 <.5 250 55 130USGS GSP-2 Found - - - - Set B 3.0 15 1,300 <.1 <.5 250 53 130USGS GSP-2 Found - - - - Set B 2.4 16 1,300 .1 <.5 260 54 120USGS GSP-2 Found (average) - - - - Set B 2.3 15 1,300 <.1 <.5 253 54 127

Table 3  35
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number beta- HCH alpha- HCH Aldrin Lindane p,p’-DDD p,p’-DDE

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <1.0 <3.0 <4.0 <1.0 6.8 4.1300056090070301 FDL Street mud 10/03/2005 200528605 <.5 <1.5 E1.5 <.5 27 13300125090071701 E1 Suspended sediment 9/20/2005 200527104 <95 <290 <380 <95 <480 <290

300136090072001 E2 Suspended sediment 9/20/2005 200527104 <69 <210 <280 <69 <350 <210

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 <.5 <1.5 <2.0 <.5 E5.1 18

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 <1.0 <3.0 <4.0 <1.0 E24 E9.3300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 <.5 <1.5 <2.0 <.5 13 5.5

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <9.0 <28 <38 <9.0 95 52300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <3.0 <4.0 <1.0 14 5.8300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 <1.0 <3.0 <4.0 <1.0 4.4 3.3300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <.5 <1.5 <2.0 <.5 E1.4 E1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 <.5 <1.5 <2.0 <.5 44 20

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <.5 <1.5 <2.0 <.5 <2.5 <1.5300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.5 <4.5 <6.0 <1.5 <7.5 <4.5

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <1.5 <4.5 <6.0 <1.5 <7.5 <4.5

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 <.5 <1.5 <2.0 <.5 E1.6 1.6

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300330089575801 JNK Suspended sediment 10/04/2005 200528605 <63 <189 <252 <63 <315 <189

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.5 <4.5 <6.0 <1.5 <7.5 <4.5

Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005.[All concentrations in micrograms per kilogram except where indicated. Concentration in bold exceeds probable effect concentration (MacDonald and others, 2000). ID, identifier; cm, centimeters; <, nondetection at indicated value; E, estimated value; dup., duplicate; - -, not applicable; na, not available; nr, not reported by lab; nd, not detected]

Table 4

36  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number beta- HCH alpha- HCH Aldrin Lindane p,p’-DDD p,p’-DDE

Zone G—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <.5 <1.5 <2.0 <.5 <2.5 <1.5

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <130 <380 <500 <130 <630 <380

295808090001601 CHL Suspended sediment 10/04/2005 200528605 <8.0 <20 <26 <8.0 <32 <20

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <4.0 <12 <16 <4.0 <20 <12

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 <.5 <1.5 <2.0 <.5 <2.5 E.85

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <.5 <1.5 <2.0 <.5 3.2 E1.5

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 <.5 <1.5 <2.0 <.5 3.3 5.3300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.5 <4.6 <6.0 <1.5 <7.5 <4.5

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <.5 <1.5 <2.0 <.5 E1.9 E1.0

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.5 <4.5 <6.0 <1.5 <7.5 <4.5

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <1.0 <3.0 <4.0 <1.0 <5.0 <3.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <.5 <1.5 <2.0 <.5 <2.5 <1.5

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <.5 <1.5 <2.0 <.5 <2.5 <1.5

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <.5 <1.5 <2.0 <.5 <2.5 <1.5

Table 4  37
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number beta- HCH alpha- HCH Aldrin Lindane p,p’-DDD p,p’-DDE

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na 2.37 4.88 3.16Probable effect concentration (PEC) - - - - na na na 4.99 28 31.3

Quality-assurance samples

Blank - - 200527104 <0.50 <1.5 <2.0 <.50 <2.5 <1.5Spike, in percent recovered (acceptable range) - - 200527104 84 (45–85) 72 (35–77) 86 (32–101) 72 (29–81) na 88 (51–120)

Blank - - 200528605 <.50 <1.5 <2.0 <.50 <2.5 <1.5Spike, in percent recovered (acceptable range) - - 200528605 1.4 (47–87) 1.1 (39–79) 1.6 (33–99) 1.2 (30–84) 1.2 (22–110) 1.5 (49–121)

Blank - - 200529704 <.50 <1.5 <2.0 <.50 <2.5 <1.5

Spike, in percent recovered (acceptable range) - - 200529704 70 (47–87) 60 (39–79) 95 (33–99) 70 (30–84) 50 (22–110) 70 (49–121)Blank - - 200529903 <.50 <1.5 <2.0 <.50 <2.5 <1.5

Spike, in percent recovered (acceptable range) - - 200529903 70 (47–87) 54 (39–79) 75 (33–99) 54 (30–84) 80 (22–110) 64 (49–121)Blank - - 200532509 <.50 <1.5 <2.0 <.50 <2.5 <1.5

Spike, in percent recovered (acceptable range) - - 200532509 77 (47–87) 74 (39–79) 80 (33–99) 78 (30–84) 78 (22–110) 87 (49–121)

Blank - - 200532604 <.50 <1.5 <2.0 <.50 <2.5 <1.5Spike, in percent recovered (acceptable range) - - 200532604 79 (47–87) 74 (39–79) 45 (33–99) 71 (30–84) 86 (22–110) 60 (49–121)

38  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number p,p’-DDT Dieldrin alpha- Endosulfan Endrin Toxaphene

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 22 6.9 <1.0 <2.0 <400300056090070301 FDL Street mud 10/03/2005 200528605 6.0 27 <.5 <1.0 <200300125090071701 E1 Suspended sediment 9/20/2005 200527104 <190 <95 <95 <190 <38,000300136090072001 E2 Suspended sediment 9/20/2005 200527104 <140 <69 <69 <140 <28,000300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 <1.0 2.7 <.5 <1.0 <200300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 E2.5 E15 <1.0 <2.0 <400300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 <7.2 4.7 <.5 <1.0 <200300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 E12 51 <9.0 <19 <3,800300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 <11 6.2 <1.0 <2.0 <400300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 <1.0 1.8 <1.0 <2.0 <400300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <7.6 1.1 <1.0 <2.0 <400300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 E.71 <1.0 <2.0 <400301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <1.0 .82 <.5 <1.0 <200

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 2.6 12 <.5 <1.0 <200300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 1.8 <.5 <1.0 <200300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 E1.5 <1.5 <3.0 <600300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <3.0 <1.5 <1.5 <3.0 <600300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 <1.0 1.5 <.5 <1.0 <200

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 E.59 E.36 <.5 <1.0 <200300330089575801 JNK Suspended sediment 10/04/2005 200528605 <126 <63 <63 <126 <25,200300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <.5 <.5 <1.0 <200300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <1.0 <.5 <.5 <1.0 <200300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 <1.0 <.5 <.5 <1.0 <200300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <2.3 <.5 <.5 <1.0 <200300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <1.5 <1.5 <3.0 <600

Table 4  39
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number p,p’-DDT Dieldrin alpha- Endosulfan Endrin Toxaphene

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <2.0 <1.0 <1.0 <2.0 <400300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <.5 <.5 <1.0 <200

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <250 <130 <130 <250 <50,000295808090001601 CHL Suspended sediment 10/04/2005 200528605 <13 14 <8.0 <13 <2,600300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 <2.0 <1.0 <1.0 <2.0 <400300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 <1.0 <.5 <.5 <1.0 <200300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <2.0 <1.0 <1.0 <2.0 <400300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 <1.0 <.5 <.5 <1.0 <200300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <8.0 <4.0 <4.0 <8.0 <1,600300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 <1.0 <.5 <.5 <1.0 <200300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <4.5 <.5 <.5 <1.0 <200300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <7.3 <1.0 <1.0 <2.0 <400300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <7.2 3.0 <.5 <1.0 <200300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <1.0 <.5 <.5 <1.0 <200300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 <1.0 .51 <.5 <1.0 <200300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <1.0 E.33 <.5 <1.0 <200300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <18 1.7 <1.5 <3.0 <600300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <5.4 <.5 <.5 <1.0 <200300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <1.5 <1.5 <3.0 <600

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <2.0 <1.0 <1.0 <2.0 <400301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <2.0 <1.0 <1.0 <2.0 <400301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <2.0 <1.0 <1.0 <2.0 <400301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <1.0 <.5 <.5 <1.0 <200301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <1.0 <.5 <.5 <1.0 <200300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <1.0 <.5 <.5 <1.0 <200300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <1.0 <.5 <.5 <1.0 <200

40 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number p,p’-DDT Dieldrin alpha- Endosulfan Endrin Toxaphene

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - 4.16 1.9 na 2.22 naProbable effect concentration (PEC) - - - - 62.9 61.8 na 207 na

Quality-assurance samples

Blank - - 200527104 <1.0 <.50 <.50 <1.0 <200

Spike, in percent recovered (acceptable range) - - 200527104 104 (32–101) 74 (35–101) 71 (32–86) 80 (39–105) <200 (not spiked)Blank - - 200528605 <1.0 <.50 <.50 <1.0 <200Spike, in percent recovered (acceptable range) - - 200528605 1.4 (37–99) 1.3 (40–98) 1.3 (39–83) 1.3 (39–111) <200 (not spiked)Blank - - 200529704 3.6 <.50 <.50 <1.0 <200Spike, in percent recovered (acceptable range) - - 200529704 0 (37–99) 75 (40–98) 75 (39–83) 80 (39–111) <200 (not spiked)Blank - - 200529903 <1.0 <.50 <.50 <1.0 <200Spike, in percent recovered (acceptable range) - - 200529903 81 (37–99) 73 (40–98) 74 (39–83) 72 (39–111) <200 (not spiked)Blank - - 200532509 <1.0 <.50 <.50 <1.0 <200Spike, in percent recovered (acceptable range) - - 200532509 80 (37–99) 68 (40–98) 64 (39–83) 36 (39–111) <200 (not spiked)Blank - - 200532604 <1.0 <.50 <.50 <1.0 <200Spike, in percent recovered (acceptable range) - - 200532604 63 (37–99) 100 (40–98) 73 (39–83) 98 (39–111) <200 (not spiked)

Table 4  41
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Heptachlor Heptachlor epoxide p,p’- Methoxy- chlor PCB Aroclor 1254 PCB Aroclor 1260

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <2.0 <3.0 <7.0 16 23300056090070301 FDL Street mud 10/03/2005 200528605 E.53 E.82 <3.5 29 55300125090071701 E1 Suspended sediment 9/20/2005 200527104 <190 <290 <670 <950 <950300136090072001 E2 Suspended sediment 9/20/2005 200527104 <140 <210 <490 <700 <700

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 <1.0 <5.0 <4.0 59 E580

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 <2.0 E2.2 <7.0 E29 E49

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.5 <3.5 22 33

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <19 <28 <66 200 320300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <3.0 <7.0 18 30300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 <2.0 <3.0 <7.0 13 23300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <3.0 <7.0 <17 E6.7300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <3.0 <7.0 <10 <10

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <1.0 <1.5 <4.0 E5.0 E3.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 <1.0 <1.5 <3.5 78 47300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.5 <3.5 <5.0 E6.6

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <4.5 <11 E8.9 24

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <3.0 <4.5 <11 <15 <15300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 <1.0 <1.5 <4.0 E7.0 9.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 <1.0 <1.5 <3.5 E5.3 <5.0300330089575801 JNK Suspended sediment 10/04/2005 200528605 <126 <189 <441 <630 <630

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.5 <3.5 <5.0 <5.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <1.0 <1.5 <4.0 <5.0 <5.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 <1.0 <1.5 <3.5 67 27

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.5 <3.5 E3.5 E2.3300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <4.5 <11 <15 <15

42 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Heptachlor Heptachlor epoxide p,p’- Methoxy- chlor PCB Aroclor 1254 PCB Aroclor 1260

Zone J—Jahncke Canal­­—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <2.0 <3.0 <7.0 <10 <10300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.5 <3.5 <5.0 <5.0

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <250 <380 <880 <1,300 <1,300

295808090001601 CHL Suspended sediment 10/04/2005 200528605 <13 <20 <46 <65 <65

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 <2.0 <3.0 <7.0 E13 23

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 <1.0 <1.5 <3.5 42 15300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <2.0 <3.0 <7.0 E5.0 E5.9300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 <1.0 <1.5 <3.5 11 E4.8

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <8.0 <12 <28 <40 <40

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 <1.0 <1.5 <3.5 9.6 8.2300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.5 <3.5 <5.0 <5.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <3.0 <7.0 <10 <10

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.5 <3.5 <5.0 <5.0

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.5 <3.5 <5.0 <5.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 <1.0 <1.5 <4.0 E25 22300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.5 <4.0 <5.0 <5.0

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <3.0 <4.5 <11 <15 <15

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.5 <3.5 <5.0 <5.0

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <4.5 <11 <15 <15

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <2.0 <2.0 <7.0 <10 <10

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <2.0 <3.0 <7.0 <10 <10

301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <2.0 <3.0 <7.0 <10 <10

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <1.0 <1.5 <3.5 <5.0 <5.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.5 <3.5 <5.0 <5.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <1.0 <1.5 <4.0 <5.0 <5.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.5 <3.5 <5.0 <5.0

Table 4  43
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Heptachlor Heptachlor epoxide p,p’- Methoxy- chlor PCB Aroclor 1254 PCB Aroclor 1260

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na 2.47 na na naProbable effect concentration (PEC) - - - - na 16.0 na na na

Quality-assurance samples

Blank - - 200527104 <1.0 <1.5 <3.5 <5.0 <5.0

Spike, in percent recovered (acceptable range) - - 200527104 52 (24–91) 93 (35–93) 84 (27–118) 97 (45–127) 93 (47–125)Blank - - 200528605 <1.0 <1.5 <3.5 <5.0 <5.0

Spike, in percent recovered (acceptable range) - - 200528605 1.2 (21–98) 1.4 (43–88) .9 (7–135) 9.5 (43–131) 9.7 (50–122)Blank - - 200529704 <1.0 <1.5 <3.5 <5.0 <5.0

Spike, in percent recovered (acceptable range) - - 200529704 65 (21–98) 80 (43–88) 60 (7–135) 108 (43–131) 82 (50–122)

Blank - - 200529903 <1.0 <1.5 <3.5 <5.0 <5.0Spike, in percent recovered (acceptable range) - - 200529903 10 (21–98) 72 (43–88) 81 (7–135) 130 (43–131) 110 (50–122)

Blank - - 200532509 <1.0 <1.5 <3.5 <5.0 <5.0Spike, in percent recovered (acceptable range) - - 200532509 64 (21–98) 64 (43–88) 18 (7–135) 112 (43–131) 90 (50–122)

Blank - - 200532604 <1.0 <1.5 <3.5 <5.0 <5.0

Spike, in percent recovered (acceptable range) - - 200532604 41 (21–98) 81 (43–88) 108 (7–135) 92 (43–131) 72 (50–122)

44  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Hexa- chloro- benzene Mirex PCB Aroclor 1016/1242 cis- Chlordane trans- Chlordane trans- Nonachlor

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <6.0 <3.0 16 7.9 11 5.1300056090070301 FDL Street mud 10/03/2005 200528605 <3.0 <1.5 <16 26 43 15300125090071701 E1 Suspended sediment 9/20/2005 200527104 <570 <290 <950 <190 <95 <190

300136090072001 E2 Suspended sediment 9/20/2005 200527104 <420 <210 <700 <140 <69 <140

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 <3.0 <1.5 44 19 E52 9.9

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 <6.0 <3.0 E30 E21 E33 E13

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 <3.0 <1.5 <47 10 16 6.1300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 E43 <280 190 76 130 60300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 <6.0 <3.0 <22 12 19 9.4300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 <6.0 <3.0 16 3.5 6.5 3.0300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <6.0 <3.0 <10 E1.6 2.8 E1.4

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <6.0 <3.0 <10 <2.0 <1.0 <2.0

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <3.0 <1.5 <5.0 1.6 3.4 1.6

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 E1.3 <1.5 54 38 54 12300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <1.5 <5 E.60 .85 <1.0

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <9.0 <4.5 <15 E2.1 3.2 <3.0

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <9.0 <4.5 <15 <3.0 <1.5 <3.0

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 <3.0 <1.5 E3.1 2.8 4.2 2.4

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 <3.0 <1.5 <5.0 <1.0 E.46 <1.0

300330089575801 JNK Suspended sediment 10/04/2005 200528605 <378 <189 <630 <126 <63 <126

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 <3.0 <1.5 15 <1.0 1.1 E.76

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <1.5 <5.0 <1.0 E.32 <1.0

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <9.0 <4.5 <15 <3.0 <1.5 <3.0

Table 4  45
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Hexa- chloro- benzene Mirex PCB Aroclor 1016/1242 cis- Chlordane trans- Chlordane trans- Nonachlor

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <6.0 <3.0 <10 <2.0 <1.0 <2.0

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <750 <380 <1,300 <250 <130 <250

295808090001601 CHL Suspended sediment 10/04/2005 200528605 <39 <20 <65 15 16 E9.4300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 <6.0 <3.0 E5.9 <2.0 1.0 <2.0

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 <3.0 <1.5 E7.1 <1.0 <.5 <1.0

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <6.0 <3.0 <10 <2.0 <1.0 <2.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 <3.0 <1.5 E3.8 <1.0 <.5 <1.0

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <24 <12 <40 <8.0 <4.0 <8.0

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 <3.0 <1.5 7.0 E.49 .57 <1.0

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <6.0 <3.0 <10 <2.0 <1.0 <2.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.5 <1.5 <25 5.6 8.7 3.5300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 <3.0 <1.5 E20 1.3 1.7 E.51300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <3.0 <1.5 <5.0 E.50 1.1 <1.0

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <9.0 <4.5 <15 <3.0 2.5 <3.0

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <9.0 <4.5 <15 <3.0 <1.5 <3.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <6.0 <3.0 <10 <2.0 <1.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <6.0 <3.0 <10 <2.0 <1.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <6.0 <3.0 <10 <2.0 <1.0 <2.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <3.0 <1.5 <5.0 <1.0 <.5 <1.0

46  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Hexa- chloro- benzene Mirex PCB Aroclor 1016/1242 cis- Chlordane trans- Chlordane trans- Nonachlor

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na na naProbable effect concentration (PEC) - - - - na na na na na na

Quality-assurance samples

Blank - - 200527104 <3.0 <1.5 <5.0 <1.0 <.50 <1.0

Spike, in percent recovered (acceptable range) - - 200527104 60 (28–84) 95 (46–93) 72 (30–110) 80 (0–100) 85 (0–100) 70 (50–82)Blank - - 200528605 <3.0 <1.5 <5.0 <1.0 <.50 <1.0

Spike, in percent recovered (acceptable range) - - 200528605 1.6 (29–83) 1.7 (46–98) 8.6 (29–109) 1.4 (43–87) 1.4 (48–84) 1.2 (46–90)Blank - - 200529704 3.5 <1.5 <5.0 <1.0 <.50 <1.0

Spike, in percent recovered (acceptable range) - - 200529704 95 (29–83) 65 (46–98) 65 (29–109) 80 (43–87) 80 (48–84) 80 (46–90)Blank - - 200529903 <3.0 <1.5 <5.0 <1.0 <.50 <1.0

Spike, in percent recovered (acceptable range) - - 200529903 63 (29–83) 100 (46–98) <5.0 (29–109) 79 (43–87) 74 (48–84) 80 (46–90)Blank - - 200532509 <3.0 <1.5 <5.0 <1.0 <.50 <1.0

Spike, in percent recovered (acceptable range) - - 200532509 81 (29–83) 83 (46–98) 84 (29–109) 82 (43–87) 82 (48–84) 82 (46–90)Blank - - 200532604 <3.0 <1.5 <5.0 <1.0 <.50 <1.0

Spike, in percent recovered (acceptable range) - - 200532604 50 (29–83) 69 (46–98) 103 (29–109) 82 (43–87) 81 (48–84) 45 (46–90)

Table 4  47
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 8 PCB 18 PCB 22 PCB 26 PCB 28 PCB 31 PCB 33

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 2.8 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300056090070301 FDL Street mud 10/03/2005 200528605 1.9 2.3 E.84 1.5 2.3 2.3 1.6300125090071701 E1 Suspended sediment 9/20/2005 200527104 <190 <190 <190 <190 <190 <190 <190300136090072001 E2 Suspended sediment 9/20/2005 200527104 <140 <140 <140 <140 <140 <140 <140300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 2.7 2.7 1.6 1.5 4.2 2.7 3.6300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 E5.4 E2.2 E.98 E1.2 E2.9 E2.5 E2.4300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 <8.1 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 26 <19 <19 <19 <19 <19 <19300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 <6.7 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 <2.0 <2.0 4.2 <2.0 <2.0 <2.0 <2.0300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 5.6 4.8 1.6 2.7 4.6 4.9 2.8300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300330089575801 JNK Suspended sediment 10/04/2005 200528605 <126 <126 <126 <126 <126 <126 <126300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 <1.0 <1.0 <1.0 <1.0 E.56 <1.0 <1.0300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

48  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 8 PCB 18 PCB 22 PCB 26 PCB 28 PCB 31 PCB 33

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <250 <250 <250 <250 <250 <250 <250295808090001601 CHL Suspended sediment 10/04/2005 200528605 <13 <13 <13 <13 <13 <13 <13300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 <1.0 <1.0 <1.0 <1.0 E.69 <1.0 E.83300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <8.0 <8.0 <8.0 <8.0 <8.0 <8.0 <8.0300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.3300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 2.0 2.0 <1.0 E.61 3.0 1.5 1.6300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Table 4  49
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 8 PCB 18 PCB 22 PCB 26 PCB 28 PCB 31 PCB 33

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na na na naProbable effect concentration (PEC) - - - - na na na na na na na

Quality-assurance samples

Blank - - 200527104 na na na na na na naSpike, in percent recovered (acceptable range) - - 200527104 na na na na na na naBlank - - 200528605 na na na na na na naSpike, in percent recovered (acceptable range) - - 200528605 na na na na na na naBlank - - 200529704 na na na na na na naSpike, in percent recovered (acceptable range) - - 200529704 na na na na na na naBlank - - 200529903 na na na na na na naSpike, in percent recovered (acceptable range) - - 200529903 na na na na na na naBlank - - 200532509 na na na na na na naSpike, in percent recovered (acceptable range) - - 200532509 na na na na na na naBlank - - 200532604 na na na na na na naSpike, in percent recovered (acceptable range) - - 200532604 na na na na na na na

50 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 44 PCB 49 PCB 52 PCB 70 PCB 95 PCB 101

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <2.0 2.3 E1.1 <2.0 E1.7 2.0300056090070301 FDL Street mud 10/03/2005 200528605 2.1 3.3 3.0 2.3 4.1 3.0

300125090071701 E1 Suspended sediment 9/20/2005 200527104 <190 <190 <190 <190 <190 <190

300136090072001 E2 Suspended sediment 9/20/2005 200527104 <140 <140 <140 <140 <140 <140

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 2.3 6.0 4.6 3.3 6.8 6.7

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 E2.3 E3.2 E2.8 E2.3 E4.7 E5.5300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 1.1 1.0 1.3 1.3 2.4 1.8

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 E9.5 E14 19 E11 26 28300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 E1.1 <2.0 2.2 E1.9300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 <2.0 <2.0 <2.0 <2.0 E1.7 <2.0

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 4.1 3.5 4.5 5.2 7.8 7.3

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 <1.0 <1.0 <1.0 <1.0 E.80 E.95

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 <1.0 <1.0 <1.0 <1.0 <1.0 E.76

300330089575801 JNK Suspended sediment 10/04/2005 200528605 <126 <126 <126 <126 <126 <126

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 2.1 1.4 4.1 2.8 5.9 6.8

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

Table 4  51
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 44 PCB 49 PCB 52 PCB 70 PCB 95 PCB 101

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <250 <250 <250 <250 <250 <250

295808090001601 CHL Suspended sediment 10/04/2005 200528605 <13 <13 <13 <13 <13 <13

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 <2.0 <2.0 <2.0 <2.0 E1.8 E1.9

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 1.3 E1.7 2.6 1.5 4.0 4.5

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 <1.0 E.85 1.0 <1.0 1.4 1.3300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <8.0 <8.0 <8.0 <8.0 <8.0 <8.0

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 <1.0 <1.0 <1.0 <1.0 <1.0 1.4

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 2.5 3.1 3.3 2.4 4.4 3.9

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

52 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and 

Rita, 2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 44 PCB 49 PCB 52 PCB 70 PCB 95 PCB 101

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na na naProbable effect concentration (PEC) - - - - na na na na na na

Quality-assurance samples

Blank - - 200527104 na na na na na naSpike, in percent recovered (acceptable range) - - 200527104 na na na na na naBlank - - 200528605 na na na na na naSpike, in percent recovered (acceptable range) - - 200528605 na na na na na naBlank - - 200529704 na na na na na naSpike, in percent recovered (acceptable range) - - 200529704 na na na na na naBlank - - 200529903 na na na na na naSpike, in percent recovered (acceptable range) - - 200529903 na na na na na naBlank - - 200532509 na na na na na naSpike, in percent recovered (acceptable range) - - 200532509 na na na na na naBlank - - 200532604 na na na na na naSpike, in percent recovered (acceptable range) - - 200532604 na na na na na na

Table 4  53
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 110 PCB 118 PCB 138 PCB 146 PCB 149 PCB 151 PCB 170

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 2.3 E1.3 3.5 <2.0 3.1 <2.0 E1.9

300056090070301 FDL Street mud 10/03/2005 200528605 3.7 2.8 5.8 2.2 4.9 2.0 3.3300125090071701 E1 Suspended sediment 9/20/2005 200527104 <190 <190 <190 <190 <190 <190 <190300136090072001 E2 Suspended sediment 9/20/2005 200527104 <140 <140 <140 <140 <140 <140 <140300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 6.6 4.8 E32 5.7 E26 7.5 E29

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 E4.7 E2.9 E6.5 E1.8 E5.9 E2.0 E4.1

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 2.5 1.9 3.2 E.63 2.9 E.85 1.3

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 30 21 50 E10 45 <19 24

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 2.4 E1.4 3.6 <2.0 3.1 E1.3 E1.6

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 E1.9 E1.1 3.9 <2.0 3.6 <2.0 E1.4

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 7.9 6.4 11 3.7 8.5 4.1 4.0300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 E.89 <1.0 E.81 <1.0 <1.0

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 E2.6 <3.0 E2.2 <3.0 <3.0

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 E.83 E.68 1.8 <1.0 1.4 <1.0 E.64

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 E.85 E.65 E.91 <1.0 <1.0 <1.0 <1.0

300330089575801 JNK Suspended sediment 10/04/2005 200528605 <126 <126 <126 <126 <126 <126 <126300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 7.2 6.5 8.0 1.6 5.5 1.7 2.4300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 E.55 <1.0 <1.0 <1.0 <1.0

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

54  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 110 PCB 118 PCB 138 PCB 146 PCB 149 PCB 151 PCB 170

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <250 <250 <250 <250 <250 <250 <250295808090001601 CHL Suspended sediment 10/04/2005 200528605 <13 <13 <13 <13 <13 <13 <13

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 E1.1 <2.0 3.7 <2.0 3.4 <2.0 E1.9

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 4.5 4.1 4.9 1.3 3.6 1.1 1.3300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 1.5 1.3 1.3 <1.0 1.1 <1.0 <1.0

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <8.0 <8.0 <8.0 <8.0 <8.0 <8.0 <8.0

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 1.3 E.61 1.7 <1.0 1.3 <1.0 <1.0

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 3.9 3.4 4.2 E.73 3.6 E.90 1.9

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Table 4  55
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 110 PCB 118 PCB 138 PCB 146 PCB 149 PCB 151 PCB 170

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na na na naProbable effect concentration (PEC) - - - - na na na na na na na

Quality-assurance samples

Blank - - 200527104 na na na na na na naSpike, in percent recovered (acceptable range) - - 200527104 na na na na na na naBlank - - 200528605 na na na na na na naSpike, in percent recovered (acceptable range) - - 200528605 na na na na na na naBlank - - 200529704 na na na na na na naSpike, in percent recovered (acceptable range) - - 200529704 na na na na na na naBlank - - 200529903 na na na na na na naSpike, in percent recovered (acceptable range) - - 200529903 na na na na na na naBlank - - 200532509 na na na na na na naSpike, in percent recovered (acceptable range) - - 200532509 na na na na na na naBlank - - 200532604 na na na na na na naSpike, in percent recovered (acceptable range) - - 200532604 na na na na na na na

56  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 174 PCB 177 PCB 180 PCB 183 PCB 187 PCB 194 PCB 206

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 E1.2 <2.0 3.2 <2.0 E1.8 <2.0 <2.0

300056090070301 FDL Street mud 10/03/2005 200528605 2.8 2.2 5.4 2.1 3.5 2.2 1.6300125090071701 E1 Suspended sediment 9/20/2005 200527104 <190 <190 <190 <190 <190 <190 <190300136090072001 E2 Suspended sediment 9/20/2005 200527104 <140 <140 <140 <140 <140 <140 <140300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 E20 E15 E51 E14 E26 E17 4.6300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 E3.0 E2.2 E6.1 E2.4 E4.1 E2.1 E1.1300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 1.6 E.95 3.3 E.70 1.7 E.74 <1.0

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 19 E15 44 E13 27 E12 <19

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 E1.5 <2.0 3.0 <2.0 <2.0 <2.0 <2.0

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 <2.0 <2.0 3.0 <2.0 E1.7 <2.0 <2.0

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 5.7 4.7 9.9 4.1 6.8 4.3 2.8

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 E.76 <1.0 <1.0 <1.0 <1.0

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 3.2 <3.0 E1.5 <3.0 <3.0

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 <1.0 <1.0 1.4 <1.0 E.70 <1.0 <1.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300330089575801 JNK Suspended sediment 10/04/2005 200528605 <126 <126 <126 <126 <126 <126 <126300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 1.6 1.0 3.5 1.0 1.9 E.59 <1.0300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

Table 4  57
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 174 PCB 177 PCB 180 PCB 183 PCB 187 PCB 194 PCB 206

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 <250 <250 <250 <250 <250 <250 <250295808090001601 CHL Suspended sediment 10/04/2005 200528605 <13 <13 <13 <13 <13 <13 <13

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 E1.3 <2.0 3.7 <2.0 E1.8 <2.0 <2.0

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 E.97 E.66 2.0 E.71 1.3 <1.0 <1.0

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 <1.0 <1.0 E.59 <1.0 <1.0 <1.0 E.67

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 <8.0 <8.0 <8.0 <8.0 <8.0 <8.0 <8.0

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 <1.0 <1.0 1.2 <1.0 <1.0 <1.0 <1.0

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 1.4 E.88 3.3 E.90 2.0 E.92 <1.0

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0 <3.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0

58  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number PCB 174 PCB 177 PCB 180 PCB 183 PCB 187 PCB 194 PCB 206

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na na na naProbable effect concentration (PEC) - - - - na na na na na na na

Quality-assurance samples

Blank - - 200527104 na na na na na na naSpike, in percent recovered (acceptable range) - - 200527104 na na na na na na naBlank - - 200528605 na na na na na na naSpike, in percent recovered (acceptable range) - - 200528605 na na na na na na naBlank - - 200529704 na na na na na na naSpike, in percent recovered (acceptable range) - - 200529704 na na na na na na naBlank - - 200529903 na na na na na na naSpike, in percent recovered (acceptable range) - - 200529903 na na na na na na naBlank - - 200532509 na na na na na na naSpike, in percent recovered (acceptable range) - - 200532509 na na na na na na naBlank - - 200532604 na na na na na na naSpike, in percent recovered (acceptable range) - - 200532604 na na na na na na na

Table 4  59
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Sample mass (grams)

Surrogates, in percent recovery 

(acceptable range) Calculated values

Isodrin

(42-94)

alphaHCH-d6

(19-125)

Nonachlorobiphenyl 

(21-140)

Total

DDT

Total

PCB 

Aroclors

Total PCB 

congeners

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 11.6 nr 75.7 62.9 33 55 E28300056090070301 FDL Street mud 10/03/2005 200528605 21.7 85.0 69.3 91.4 46 E84 E75

300125090071701 E1 Suspended sediment 9/20/2005 200527104 .13 nr 84.3 69.7 nd nd nd300136090072001 E2 Suspended sediment 9/20/2005 200527104 .18 nr 93.4 73.5 nd nd nd300125090074400 MET Bed sediment (dredge) 9/29/2005 200532509 22.0 81.1 53.4 78.2 E23 E683 E308300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527104 11.3 nr 47.7 36.2 E36 E108 E87

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 200529704 15.6 62.9 84.3 67.3 E18 E55 E31

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 1.3 nr 81.6 63.2 E159 710 E444300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 200529704 8.5 5.3 73.9 58.9 E20 E48 E23

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 200527104 8.4 nr 79.5 73.1 E7.7 52 E22300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 200529704 9.8 64.4 86.0 63.2 nd E6.7 nd300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 200529704 8.7 83.6 80.7 81.7 nd nd nd301414090083900 BON Bed sediment (dredge) 9/29/2005 200532509 23.3 80.5 89.7 85.0 E2.4 E8.0 nd

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200528605 20.4 48.2 54.5 69.2 67 179 143300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529903 22.8 78.7 75.9 86.5 nd E6.6 E2.5

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529903 6.6 62.5 88.2 65.5 nd E33 E9.5

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529903 8.2 76.1 90.0 83.2 nd nd nd300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532509 22.3 83.5 95.5 89.7 E3.2 E19 E9.2

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200528605 27.6 59.8 68.9 76.0 E.59 E5.3 E3.2

300330089575801 JNK Suspended sediment 10/04/2005 200528605 .20 49.9 84.2 126 nd nd nd300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529903 24.2 83.6 84.9 93.3 nd nd nd300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532509 22.3 67.0 68.8 69.4 nd nd nd300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532604 16.7 51.3 87.3 65.9 nd 109 E66300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529903 15.8 51.0 92.7 63.5 nd E5.8 E.55

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529903 8.3 63.2 98.8 75.5 nd nd nd

60 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Sample mass (grams)

Surrogates, in percent recovery 

(acceptable range) Calculated values

Isodrin

(42-94)

alphaHCH-d6

(19-125)

Nonachlorobiphenyl 

(21-140)

Total

DDT

Total

PCB 

Aroclors

Total PCB 

congeners

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529903 8.6 74.9 97.6 85.9 nd nd nd300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529903 19.3 72.3 87.8 82.7 nd nd nd

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 200527104 .05 nr 88.2 67.0 nd nd nd295808090001601 CHL Suspended sediment 10/04/2005 200528605 1.8 32.4 65.2 87.5 nd nd nd300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532509 10.3 51.1 86.4 77.8 nd E42 E21

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532604 23.1 56.0 103 70.6 nd E64 E44

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532604 10.6 34.3 103 76.1 nd E11 nd

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532604 21.3 58.4 108 80.6 nd E20 E11

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 200527104 3.0 nr 80.9 72.0 nd nd nd300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 200527104 15.7 nr 68.1 50.0 E.85 E25 E7.5

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 200529704 21.3 75.1 83.0 75.8 nd nd nd300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529704 10.7 96.7 93.3 91.7 nd nd nd300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529704 13.9 64.0 87.7 71.6 E4.7 nd nd300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532509 21.9 70.8 79.0 72.5 nd nd nd300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532509 17.6 63.7 79.5 80.2 E8.6 E67 E58

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532509 19.8 65.0 77.8 72.5 nd nd nd300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 200529704 7.3 44.9 77.6 78.9 nd nd nd300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529704 16.3 71.2 87.1 73.8 E2.9 nd nd300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529903 8.2 64.0 86.1 76.4 nd nd nd

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532509 11.4 87.7 94.8 89.9 nd nd nd301151090075700 MID Bed sediment (dredge) 10/04/2005 200532604 12.5 78.0 100 91.0 nd nd nd301151090075700 MID Bed sediment (dredge) 10/20/2005 200532604 30.0 81.3 118 86.7 nd nd nd301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532604 25.0 86.9 112 96.2 nd nd nd301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532604 25.0 77.5 101 86.5 nd nd nd300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532509 23.4 91.6 81.1 94.9 nd nd nd300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532604 24.5 95.6 104 117 nd nd nd

Table 4  61
Table 4. Chlorinated hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued.

USGS

station ID

Sample ID and 

interval (cm) 

where shown

Sample type Sample date Set number Sample mass (grams)

Surrogates, in percent recovery 

(acceptable range) Calculated values

Isodrin

(42-94)

alphaHCH-d6

(19-125)

Nonachlorobiphenyl 

(21-140)

Total

DDT

Total

PCB 

Aroclors

Total PCB 

congeners

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - - - - - - - - - 5.28 59.8 59.8Probable effect concentration (PEC) - - - - - - - - - - - - 572 676 676

Quality-assurance samples

Blank - - 200527104 - - na 78.4 82 - - - - - -Spike, in percent recovered (acceptable range) - - 200527104 - - na 69.1 73.1 - - - - - -Blank - - 200528605 - - 101 74.2 122 - - - - - -Spike, in percent recovered (acceptable range) - - 200528605 - - 86.8 73.3 101.5 - - - - - -Blank - - 200529704 - - 81.8 52.2 88.7 - - - - - -Spike, in percent recovered (acceptable range) - - 200529704 - - 105.6 72.6 101.9 - - - - - -Blank - - 200529903 - - 72.2 63.5 105.0 - - - - - -Spike, in percent recovered (acceptable range) - - 200529903 - - 82.4 61.2 102.8 - - - - - -Blank - - 200532509 - - 77.9 70.9 90.3 - - - - - -Spike, in percent recovered (acceptable range) - - 200532509 - - 86.9 77.6 95.9 - - - - - -Blank - - 200532604 - - 77.5 91 92.1 - - - - - -Spike, in percent recovered (acceptable range) - - 200532604 - - 55.5 97.2 73.9 - - - - - -

62 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Naphthalene C1-128 Isomers, methylated naphthalenes 2-Ethyl- naphthalene 2,6-Dimethyl- naphthalene

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 29 E66 E14 180300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 30 E76 E17 180300056090070301 FDL Street mud 10/03/2005 2505R05285 160 E280 24 79300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <1,900 E1,800 <1,900 5,800300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,400 E1,700 <1,400 4,100300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 600 na 140 360300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 110 E190 32 310300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 34 E84 E11 110300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 29 E88 E14 140300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E26 E91 <30 100300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 <30 E130 <30 210300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 E45 <25 42300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E21 E29 <30 <30

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 E5.2 na <10 E9.8

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 74 E290 32 120

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 E4.3 E8.4 E3.1 E8.7300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 E27 <40 E31

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <30 E25 <30 E34

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 20 na 10 40

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 E4.7 E23 <9.0 32300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 E4.4 E18 <14 30300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,300 E1,100 <1,300 3,500300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 E1.9 <10 E4.5

300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 E1.6 <10 E5.1

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 E9.6 na <10 20

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 20 na 20 70300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <16 E20 <16 30

Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005.[All concentrations in micrograms per kilogram except where indicated. Concentration in bold exceeds probable effect concentration (MacDonald and others, 2000). ID, identifier; cm, centimeters; E, estimated value; dup., duplicate; <, nondetection at indicated value; na, not available; - -, not applicable; ΣPAHSQG, total polycyclic aromatic hydrocarbons used for consensus-based sediment-quality guidelines]

Table 5

Table 5  63
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Naphthalene C1-128 Isomers, methylated naphthalenes 2-Ethyl- naphthalene 2,6-Dimethyl- naphthalene

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E25 <30 37300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E25 <30 E26

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 E7.8 <13 E9.4

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 E4,100 <5,500 10,000

295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <140 E760 <140 2,200300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 E10 na <20 70300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 10 na E8.3 20300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 <20 na <20 50300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 E4.1 na <10 E9.9300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 <85 E130 <85 220

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 E9.8 E34 <16 82300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <12 E3.7 <12 <12300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <12 E2.2 <12 <12

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 E30 <25 30300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <18 E25 <18 27300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 20 na E10 50300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 E4.3 na <10 20300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 <11 na <11 E9.9

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 E48 <35 44300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <15 E27 <15 31300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E24 <30 E27

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 <20 na <20 40

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 <20 na <20 30301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 <30 na <30 30301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 <10 na <10 <10301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 <10 na <10 <10

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 <10 na <10 <10

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 <10 na <10 <10

64  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Naphthalene C1-128 Isomers, methylated naphthalenes 2-Ethyl- naphthalene 2,6-Dimethyl- naphthalene

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - 176 na na naProbable effect concentration (PEC) - - - - 561 na na na

Quality-assurance samples

Blank - - 2505R05270 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 2505R05270 73.98 (49–94) na 77.26 (36–92) 77.43 (33–94)Blank - - 2505R05285 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 2505R05285 81.65 (49–94) na 81.56 (36–92) 81.40 (33–94)Blank - - 2505R05291 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 2505R05291 81.54 (49–94) na 80.37 (36–92) 79.11 (33–94)Blank - - 200529904 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 200529904 62.33 (49–94) na 65.55 (36–92) 65.79 (33–94)Blank - - 200532510 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 200532510 85.1 (49–94) na 84.6 (36–92) 86.3 (33–94)Blank - - 200532603 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 200532603 79 (49–94) na 78.8 (36–92) 79.1 (33–94)

Table 5  65
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number 1,6-Dimethyl- naphthalene

C2-128

Isomers, 

C2-alkyated 

naphthalenes

Acenaphthylene 1,2- Dimethyl- naphthalene Acenaph- thene

C3-128

Isomers, 

C3-alkylated 

naphthalenes

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 49 E290 81 <22 79 E290300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 54 E300 83 27 80 E310300056090070301 FDL Street mud 10/03/2005 2505R05285 53 E320 480 33 370 E930300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 E1,400 E7,100 <1,900 <1,900 E160 E2,000

300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 E980 E4,900 <1,400 <1,400 <1,400 <1,400

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 200 na 450 120 1,100 220300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 85 E580 260 60 260 E760300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 30 E210 91 18 69 E340300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 46 E240 91 <20 45 E200

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E28 E180 85 <30 48 E300

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 50 E290 42 <30 E12 E98

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 E74 29 <25 E8.3 E53

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <30 <50 <30 <30 <30 <80

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 E6.3 na 20 <10 20 na

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 66 E550 160 <12 82 E3,200300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 E3.8 E14 E6.5 <11 E3.5 E18

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 E50 E20 <40 E11 E40

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 E11 E49 E12 <30 <30 E29

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 20 na 30 <10 30 10

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 10 E57 37 <9.0 E5.5 E49

300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 E12 E54 41 <14 E5.7 E57

300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 E790 E4,300 E590 <1,300 <1,300 <1,500

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 E5.0 <10 <10 <10 <10

300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 E6.0 <10 <10 <10 <10

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 E8.0 na 20 <10 E6.2 na

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 20 na 50 <20 70 na

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 E6.0 E38 E8.9 <16 <16 E13

66  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number 1,6-Dimethyl- naphthalene

C2-128

Isomers, 

C2-alkyated 

naphthalenes

Acenaphthylene 1,2- Dimethyl- naphthalene Acenaph- thene C3-128 Isomers, C3-alkylated naphthalenes

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 E9.8 E48 E11 <30 <30 E23300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 E9.6 E36 E11 <30 <30 <35

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 E13 E5.0 <13 <13 E8.7

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 E12,000 <5,500 <5,500 <5,500 <5,500

295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 E100 E2,400 <140 <140 <140 <690

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 E20 na E20 <20 E10 E20

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 E9.0 na 40 <10 40 na

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 E10 na E10 <20 <20 <20

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 E6.9 na E9.8 <10 E4.7 na

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 E72 E290 E45 <85 <85 E210

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 21 E110 26 <16 E8.3 E63

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <12 <13 <12 <12 <12 <14

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <12 <17 <12 <12 <12 <16

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E12 E49 E13 <25 <25 <55

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E11 E52 20 <18 E12 E46

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 20 na 30 <10 20 20

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 E7.3 na E10 <10 E3.7 <10300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 E5.5 na E8.9 <11 <11 na

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E17 E75 E23 <35 <35 E49

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 E8.7 E56 E12 <15 <15 E33

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 E10 E40 E24 <30 <30 E30

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 E10 na E20 <20 <20 na

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 <20 na E10 <20 <20 na

301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 E20 na E20 <30 <30 na

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 <10 na <10 <10 <10 na

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 <10 na <10 <10 <10 na

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 <10 na <10 <10 <10 na

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 <10 na <10 <10 E2.6 na

Table 5  67
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued. 

USGS

station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number 1,6-Dimethyl- naphthalene

C2-128

Isomers, 

C2-alkyated 

naphthalenes

Acenaphthylene 1,2- Dimethyl- naphthalene Acenaph- thene

C3-128

Isomers, 

C3-alkylated 

naphthalenes

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na na naProbable effect concentration (PEC) - - - - na na na na na na

Quality-assurance samples

Blank - - 2505R05270 <10 na <10 <10 <10 naSpike, in percent recovered (acceptable range) - - 2505R05270 77.58 (37–89) na 77.08 (33–84) 76.57 (44–89) 77.58 (49–81) naBlank - - 2505R05285 <10 na <10 <10 <10 na

Spike, in percent recovered (acceptable range) - - 2505R05285 81.56 (37–89) na 80.97 (33–84) 82.59 (44–89) 83.63 (49–81) naBlank - - 2505R05291 <10 na <10 <10 <10 na

Spike, in percent recovered (acceptable range) - - 2505R05291 80.63 (37–89) na 79.88 (33–84) 80.44 (44–89) 81.58 (49–81) naBlank - - 200529904 <10 na <10 <10 <10 na

Spike, in percent recovered (acceptable range) - - 200529904 65.94 (37–89) na 67.13 (33–84) 66.43 (44–89) 67.70 (49–81) naBlank - - 200532510 <10 na <10 <10 <10 na

Spike, in percent recovered (acceptable range) - - 200532510 85.6 (37–89) na 84.4 (33–84) 86.3 (44–89) 85.5 (49–81) naBlank - - 200532603 <10 na <10 <10 <10 na

Spike, in percent recovered (acceptable range) - - 200532603 79.2 (37–89) na 77.3 (33–84) 79.6 (44–89) 79.1 (49–81) na

68  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval 

(cm), 

where shown

Sample type Sample date Set number 2,3,6- Trimethyl- naphthalene 9H- Fluorene C4-128 Isomers, C4- alkylated naphthalenes 1-methyl- 9H-Fluorene Phenan- threne

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 34 100 E260 36 430300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 40 110 E260 38 430300056090070301 FDL Street mud 10/03/2005 2505R05285 57 440 E420 69 2,800300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <1,900 E600 <2,400 <1,900 E850300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,400 E380 <1,800 <1,400 E490300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 1,200 na na 190 8,200300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 83 320 E710 92 1,200300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 21 83 E340 28 490300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 29 62 E180 31 360300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E24 71 E340 30 330300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 E24 E25 <110 E22 85300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 E18 <90 E15 70300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <30 E20 <90 <30 79301414090083900 BON Bed sediment (dredge) 09/29/2005 200532510 E6.0 20 na E6.4 270

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 200 82 E2,700 58 360300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 <11 E5.9 <17 E3.9 37300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 E22 <70 E14 79300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <30 E14 <50 <30 E25300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 30 na na E10 280

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 <9.0 E7.7 <30 <9.0 83300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 <14 E7.7 <40 <14 74300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,300 <1,300 <1,700 <1,300 E260300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 E5.6 <10 na <10 50300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 20 70 na 20 360300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <16 E8.2 <25 <16 39

Table 5  69
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval 

(cm), 

where shown

Sample type Sample date Set number 2,,-

Trimethylnaphthalene

HFluorene

C-12

Isomers, C-

alkylated 

naphthalenes

1-methyl-

H-Fluorene

Phenanthrene

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E12 <30 <30 E20300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E12 <40 <30 E18300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 E5.5 <16 <13 E12

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 <6,000 <5,500 E1,000

295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <140 <140 <500 <140 <140300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 E20 na na E20 60300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 E8.5 30 na E10 270300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 <20 na na <20 20300054090014600

NAV Bed sediment (dredge) 10/05/2005 200532603 E7.4 <10 na <10 20

300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 E61 <85 <200 <85 E85300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 E14 E13 <50 E11 74300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <12 <12 <13 <12 16300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <12 <12 <16 <12 16300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 <25 <40 <25 E19300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <18 19 <55 E12 80300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 30 na na 30 130300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 E10 na na E6.6 40300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 <11 E6.5 na <11 29300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 E19 <70 E21 67300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <15 E5.9 <60 E10 17300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E19 <45 <30 94

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 E8.6 <20 na <20 E20301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 <20 <20 na <20 E10301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 <30 <30 na <30 <30301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 <10 <10 na <10 <10301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 <10 <10 na <10 <10300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 <10 <10 na <10 <10300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 <10 E6.4 na <10 E3.4

7
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval 

(cm), 

where shown

Sample type Sample date Set number 2,3,6- Trimethyl- naphthalene 9H- Fluorene C4-128 Isomers, C4- alkylated naphthalenes 1-methyl- 9H-Fluorene Phenan- threne

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na 77.4 na na 204Probable effect concentration (PEC) - - - - na 536 na na 1,170

Quality-assurance samples

Blank - - 2505R05270 <10 <10 na <10 <10Spike, in percent recovered (acceptable range) - - 2505R05270 76.18 (38–95) 77.09 (31–96) na 78.17 (37–97) 78.65 (52–90)Blank - - 2505R05285 <10 <10 na <10 <10Spike, in percent recovered (acceptable range) - - 2505R05285 82.57 (38–95) 84.00 (31–96) na 85.35 (37–97) 83.28 (52–90)Blank - - 2505R05291 <10 <10 na <10 <10Spike, in percent recovered (acceptable range) - - 2505R05291 80.75 (38–95) 82.07 (31–96) na 82.91 (37–97) 84.81 (52–90)Blank - - 200529904 <10 <10 na <10 <10Spike, in percent recovered (acceptable range) - - 200529904 68.57 (38–95) 69.35 (31–96) na 70.49 (37–97) 74.37 (52–90)Blank - - 200532510 <10 <10 na <10 <10Spike, in percent recovered (acceptable range) - - 200532510 86.0 (38–95) 86.4 (31–96) na 87.2 (37–97) 89.5 (52–90)Blank - - 200532603 <10 <10 na <10 <10Spike, in percent recovered (acceptable range) - - 200532603 79.5 (38–95) 80.0 (31–96) na 81.1 (37–97) 83.4 (52–90)

Table 5  71
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Anthracene

C5-128

Isomers, C5-

alkylated 

naphthalenes

2-Methylanthracene

4,5-

Methylenephenanthrene

C1-178

Isomers, 

methylated 

phenanthrene/

anthracenes

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 180 <60 56 120 E290300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 170 <60 56 120 E310300056090070301 FDL Street mud 10/03/2005 2505R05285 1,000 <60 320 540 E1,400300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 E1,400 <1,900 <1,900 <1,900 E2,100300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 E910 <1,400 <1,400 <1,400 E1,400300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 1,800 na 460 900 na300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 550 <130 140 320 E1,000300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 200 E51 56 100 E360300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 180 <60 55 94 E270300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 170 E58 54 96 E300300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 72 <40 <30 43 E110300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 47 <25 E21 E20 E72300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E25 <30 <30 E19 E64301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 60 na <20 40 na

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 280 <210 180 210 E670300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 12 <11 E3.2 E3.5 E24300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 E36 <40 <40 <40 E69300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 E19 <30 <30 <30 E33300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 80 na <20 40 na

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 77 <25 17 15 E83300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 67 <30 19 18 E78300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 E650 <2,400 <1,300 <1,300 <7,200300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 30 na <10 10 na300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 230 na 60 90 na300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 E14 <16 <16 <16 E23

72 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Anthracene

C5-128

Isomers, C5-

alkylated 

naphthalenes

2-Methylanthracene 4,5- Methylene- phenanthrene

C1-178

Isomers, 

methylated 

phenanthrene/

anthracenes

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 E16 <30 <30 <30 E30300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 E16 <30 <30 <30 E26300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 E8.2 <13 <13 <13 E12

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 <5,500 <5,500 <5,500295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <140 <3,900 <140 <140 <3,000300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 40 na <20 E20 na300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 130 na 30 60 na300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 20 na <20 E20 na300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 20 na <10 <10 na300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 91 <85 <85 E64 E170300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 49 <19 21 24 E64300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 E7.8 <12 <12 E3.2 E15300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 E8.5 <12 <12 E3.1 E16300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E17 <25 E14 <25 E34300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 40 <18 E16 21 E59300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 100 na <40 70 na300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 20 na <10 10 na300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 15 na <11 E8.4 na300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 49 <20 E21 E19 E68300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 17 <15 E10 E12 E34300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 54 <30 <30 <30 E57

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 30 na <20 E10 na301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 E20 na <20 <20 na301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 <30 na <30 <30 na301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 <10 na <10 <10 na301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 <10 na <10 <10 na300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 <10 na <10 <10 na300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 E6.3 na <10 <10 na

Table 5  73
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Anthracene

C5-128

Isomers, C5-

alkylated 

naphthalenes

2-Methylanthracene

4,5-

Methylenephenanthrene

C1-178

Isomers, 

methylated 

phenanthrene/

anthracenes

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - 57.2 na na na naProbable effect concentration (PEC) - - - - 845 na na na na

Quality-assurance samples

Blank - - 2505R05270 <10 na <10 <10 naSpike, in percent recovered (acceptable range) - - 2505R05270 76.03 (44–77) na 75.33 (27–93) 78.97 (53–90) naBlank - - 2505R05285 <10 na <10 <10 naSpike, in percent recovered (acceptable range) - - 2505R05285 79.46 (44–77) na 76.88 (27–93) 83.54 (53–90) naBlank - - 2505R05291 <10 na <10 <10 naSpike, in percent recovered (acceptable range) - - 2505R05291 80.10 (44–77) na 80.06 (27–93) 86.83 (53–90) naBlank - - 200529904 <10 na <10 <10 naSpike, in percent recovered (acceptable range) - - 200529904 72.63 (44–77) na 70.73 (27–93) 73.70 (53–90) naBlank - - 200532510 <10 na <10 <10 naSpike, in percent recovered (acceptable range) - - 200532510 85.0 (44–77) na 84.1 (27–93) 93.1 (53–90) naBlank - - 200532603 <10 na <10 <10 naSpike, in percent recovered (acceptable range) - - 200532603 79.2 (44–77) na 81.0 (27–93) 85.9 (53–90) na

74  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number 1-Methyl- phenan- threne C2-1 Isomers, C2-alkylated phenanthrene/ anthracenes Fluoranthene Pyrene

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 53 E310 1,000 770300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 58 E290 980 750300056090070301 FDL Street mud 10/03/2005 2505R05285 250 E970 5,500 4,400300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <1,900 <2,200 2,800 2,500300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,400 <1,400 1,700 1,500300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 480 na 11,000 7,600300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 140 E930 3,100 2,300300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 52 E330 1,200 910300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 51 E250 1,000 820300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 46 E350 1,000 820300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 <30 E120 320 290300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E14 E68 230 200300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E13 <45 110 93301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 20 na 780 620

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 140 E1,000 1,400 1,300300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 <11 E20 130 110300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 E66 260 230300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <30 E34 86 84300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 30 na 550 450

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 14 E69 300 220300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 16 E72 310 220300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,300 <1,500 <1,300 <1,300

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 E3.5 E2.2

300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 E4.5 E2.9

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 E8.3 na 150 120300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 40 na 1,100 860300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <16 E22 96 72

Table 5  75
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number 1-Methyl- phenan- threne C2-178 Isomers, C2-alkylated phenanthrene/ anthracenes Fluoranthene Pyrene

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E29 65 55300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E25 62 57300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 E12 38 30

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 E4,400 E4,300295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <140 <1,300 280 250300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 E20 na 140 120300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 30 na 770 770300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 <20 na 100 90300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 <10 na 50 60300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 <85 E190 290 270300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 <16 E59 210 210300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 E4.6 <12 36 26300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 E5.4 <13 38 26300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 E34 53 49300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E11 E60 190 160300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 <20 na 840 710300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 E6.2 na 140 110300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 <11 na 87 69300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E15 E72 180 150300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 E6.5 E42 60 62300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 E46 280 220

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 <20 na 130 120301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 <20 na 30 30301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 <30 na 30 30301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 <10 na <10 <10

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 <10 na <10 <10

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 <10 na E7.1 E6.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 <10 na E7.9 E7.6

76  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number 1-Methyl- phenan- threne C2-178 Isomers, C2-alkylated phenanthrene/ anthracenes Fluoranthene Pyrene

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na 423 195Probable effect concentration (PEC) - - - - na na 2,230 1,520

Quality-assurance samples

Blank - - 2505R05270 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 2505R05270 79.69 (57–87) na 80.60 (65–92) 80.99 (64–94)Blank - - 2505R05285 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 2505R05285 82.49 (57–87) na 82.60 (65–92) 83.10 (64–94)Blank - - 2505R05291 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 2505R05291 86.91 (57–87) na 88.20 (65–92) 89.32 (64–94)Blank - - 200529904 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 200529904 76.74 (57–87) na 77.48 (65–92) 77.02 (64–94)Blank - - 200532510 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 200532510 91.6 (57–87) na 90.5 (65–92) 89.7 (64–94)Blank - - 200532603 <10 na <10 <10

Spike, in percent recovered (acceptable range) - - 200532603 86.3 (57–87) na 88.2 (65–92) 87.6 (64–94)

Table 5  77
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C3-178

Isomers, 

C3-alkylated 

phenanthrene/

anthracenes

C4-178

Isomers, 

C4-alkylated 

phenanthrene/

anthracenes

1-Methylpyrene

C1-202 

Isomers, 

methylated 

fluoranthene/

pyrenes

C2-202 

Isomers, 

C2-alkylated 

fluoranthene 

/pyrenes

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 E150 <100 55 E520 <350300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 E150 <110 55 E510 <330

300056090070301 FDL Street mud 10/03/2005 2505R05285 E450 <270 310 E3,200 <1,800

300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <2,100 <2,100 <1,900 E2,500 <2,400

300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,400 <1,400 <1,400 E1,600 <1,500

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 na na 380 na na

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 E410 <270 280 E1,700 E950300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 E180 <100 55 E710 E320

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 E130 <100 56 E540 <400

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 E200 <130 55 E660 E290

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 E70 <65 37 E220 <190

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <45 <40 E20 E160 <80

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <30 <30 <30 E94 <45

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 na na 30 na na

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 E910 <550 220 E1,300 E890

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 <11 <11 E7.6 E66 <35

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 <40 E20 E160 <85

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 E71 <45

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 na na 30 na na

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 <75 <25 <9.0 E160 <160

300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 <75 <35 <14 E150 <180

300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <3,100 <1,300 <1,300 <1,300 <1,400

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10

300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 na na 10 na na300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 na na 50 na na300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <16 <16 <16 E51 <35

78  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C3-178

Isomers, 

C3-alkylated 

phenanthrene/

anthracenes

C4-178

Isomers, 

C4-alkylated 

phenanthrene/

anthracenes

1-Methylpyrene

C1-202 

Isomers, 

methylated 

fluoranthene/

pyrenes

C2-202 

Isomers, 

C2-alkylated 

fluoranthene 

/pyrenes

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 E54 <30300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 E51 <30

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 <13 <13 E23 <13

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 <5,500 <5,500 <5,500

295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <3,100 <1,300 <140 E300 <220

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 na na E20 na na

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 na na 50 na na300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 na na <20 na na300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 na na <20 na na300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 E130 <95 E74 E220 <180300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 <35 <30 24 E140 <110

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <12 <12 <12 E21 <13

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <12 <12 <12 E23 <14

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 <25 <25 E57 <35

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 <35 E14 E110 <60

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 na na 50 na na

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 na na <10 na na300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 na na <11 na na300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <45 <40 E19 E120 <60

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 E30 <25 E10 E66 <40

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 E120 <60

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 na na E20 na na

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 na na <20 na na301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 na na <30 na na301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 na na <10 na na301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 na na <10 na na300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 na na <10 na na300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 na na <10 na na

Table 5  79
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C3-178

Isomers, 

C3-alkylated 

phenanthrene/

anthracenes

C4-178

Isomers, 

C4-alkylated 

phenanthrene/

anthracenes

1-Methylpyrene

C1-202 

Isomers, 

methylated 

fluoranthene/

pyrenes

C2-202 

Isomers, 

C2-alkylated 

fluoranthene 

/pyrenes

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na naProbable effect concentration (PEC) - - - - na na na na na

Quality-assurance samples

Blank - - 2505R05270 na na <10 na naSpike, in percent recovered (acceptable range) - - 2505R05270 na na 82.70 (57–103) na naBlank - - 2505R05285 na na <10 na naSpike, in percent recovered (acceptable range) - - 2505R05285 na na 84.23 (57–103) na naBlank - - 2505R05291 na na <10 na naSpike, in percent recovered (acceptable range) - - 2505R05291 na na 89.28 (57–103) na naBlank - - 200529904 na na <10 na naSpike, in percent recovered (acceptable range) - - 200529904 na na 76.06 (57–103) na naBlank - - 200532510 na na <10 na naSpike, in percent recovered (acceptable range) - - 200532510 na na 90.6 (57–103) na naBlank - - 200532603 na na <10 na naSpike, in percent recovered (acceptable range) - - 200532603 na na 88.7 (57–103) na na

80 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C5-178

Isomers, 

C5-alkylated 

phenanthrene/

anthracenes

Benz(a)-

anthracene Chrysene

C3-202 Isomers, 

C3-alkylated 

fluoranthene/

pyrenes

C1-228 Isomers, 

methylated 

benz(a)-

anthracene/

chrysenes

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 <95 350 410 <100 <240300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 <95 340 390 <100 <200300056090070301 FDL Street mud 10/03/2005 2505R05285 <380 2,600 2,700 <890 <1,500300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <1,900 E1,700 E1,400 <1,900 <1,900300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,400 E990 E820 <1,400 <1,400300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 na 3,800 4,200 na na300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <230 1,200 1,300 <230 <630300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <100 470 570 <75 <280300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <100 400 480 <130 <240300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <100 380 470 <70 <250300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 <60 140 160 <75 <110300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 97 120 <25 <75300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <30 E30 38 <30 <30301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 na 330 450 na na

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 <350 640 730 <420 <650300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 <12 66 83 <11 <50300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 110 130 <50 <100300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <30 46 43 <30 <50300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 na 240 290 na na

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 <50 110 230 <80 <80300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 <50 100 180 <100 <80300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,300 <1,300 <1,300 <1,400 <1,300300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 na 50 80 na na300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 na 470 610 na na300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <16 31 46 <16 <30

Table 5  81
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C5-178

Isomers, 

C5-alkylated 

phenanthrene/

anthracenes

Benz(a)-

anthracene Chrysene

C3-202 Isomers, 

C3-alkylated 

fluoranthene/

pyrenes

C1-228 Isomers, 

methylated 

benz(a)-

anthracene/

chrysenes

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 34 31 <30 <40300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 32 E28 <30 <40300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 16 14 <13 <15

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 <5,500 <5,500 <5,500295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <170 150 E120 <190 <190300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 na 50 50 na na300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 na 370 400 na na300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 na 40 40 na na300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 na 40 30 na na300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 <95 130 140 <100 <120300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 <35 110 120 <45 <70300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <12 14 16 <12 <12300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <12 15 17 <12 <12300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 28 28 <25 <30300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <30 70 97 <25 <50300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 na 270 340 na na300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 na 60 80 na na300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 na 42 50 na na300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 71 91 <30 <45300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <17 25 31 <15 <30300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 84 96 <30 <30

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 na 80 70 na na301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 na <20 <20 na na301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 na <30 <30 na na301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 na <10 <10 na na301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 na <10 <10 na na300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 na <10 <10 na na300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 na <10 <10 na na

82 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C5-178

Isomers, 

C5-alkylated 

phenanthrene/

anthracenes

Benz(a)-

anthracene Chrysene

C3-202 Isomers, 

C3-alkylated 

fluoranthene/

pyrenes

C1-228 Isomers, 

methylated 

benz(a)-

anthracene/

chrysenes

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na 108 166 na naProbable effect concentration (PEC) - - - - na 1,050 1,290 na na

Quality-assurance samples

Blank - - 2505R05270 na <10 <10 na naSpike, in percent recovered (acceptable range) - - 2505R05270 na 83.12 (40–115) 83.79 (61–94) na naBlank - - 2505R05285 na <10 <10 na naSpike, in percent recovered (acceptable range) - - 2505R05285 na 86.11 (40–115) 87.09 (61–94) na naBlank - - 2505R05291 na <10 <10 na naSpike, in percent recovered (acceptable range) - - 2505R05291 na 88.70 (40–115) 93.08 (61–94) na naBlank - - 200529904 na <10 <10 na naSpike, in percent recovered (acceptable range) - - 200529904 na 78.33 (40–115) 79.67 (61–94) na naBlank - - 200532510 na <10 <10 na naSpike, in percent recovered (acceptable range) - - 200532510 na 89.8 (40–115) 92.6 (61–94) na naBlank - - 200532603 na <10 <10 na naSpike, in percent recovered (acceptable range) - - 200532603 na 89.9 (40–115) 93.8 (61–94) na na

Table 5  83
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C4-202 

Isomers, 

C4-alkylated 

fluoranthene/

pyrenes

C5-202 

Isomers, 

C5-alkylated 

fluoranthene/

pyrenes

C2-228

Isomers, 

C2-alkylated 

benz(a)-

anthracene/

chrysenes

Benzo(

b)-

fluoranthene

Benzo(

k)-

fluoranthene

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 <75 <60 <100 390 360300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 <75 <55 <95 400 310300056090070301 FDL Street mud 10/03/2005 2505R05285 <210 <130 <460 2,500 2,200300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <1,900 <1,900 <1,900 2,200 E1,900

300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,400 <1,400 <1,400 E1,400 E1,100

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 na na na 4,900 2,000300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <180 <95 <280 1,100 1,000300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <30 <55 <130 480 470300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <85 <60 <120 470 390300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <40 <65 <120 450 340300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 <65 <55 <65 190 150300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 <40 <40 150 100300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <30 <55 <30 48 34301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 na na na 580 240

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 <160 <75 <420 840 650300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 <12 <11 <17 89 74300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 <40 <50 150 110300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <35 71 50300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 na na na 380 150

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 <50 <30 <40 160 130300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 <55 <35 <45 160 130300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,300 <1,300 <1,300 <1,300 <1,300

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10

300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 na na na 90 30300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 na na na 600 250300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <16 <16 <16 54 38

84  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C4-202 

Isomers, 

C4-alkylated 

fluoranthene/

pyrenes

C5-202 

Isomers, 

C5-alkylated 

fluoranthene/

pyrenes

C2-228

Isomers, 

C2-alkylated 

benz(a)-

anthracene/

chrysenes

Benzo(b)-

fluoranthene

Benzo(k)-

fluoranthene

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 50 36300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 50 37300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 <13 <13 21 16

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 <5,500 <5,500 <5,500

295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <170 <170 <220 <140 <140

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 na na na 80 30300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 na na na 590 220300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 na na na 60 20300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 na na na 60 30300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 <90 <100 <85 190 140

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 <35 <30 <40 150 120300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <12 <12 <12 18 16300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <12 <13 <12 20 18300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 <30 <25 39 31300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <18 <30 <35 100 82300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 na na na 530 210300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 na na na 110 50300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 na na na 79 32300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 <40 <35 99 79300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <15 <20 <25 38 30300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <60 98 72

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 na na na 90 30301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 na na na <20 <20301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 na na na 30 E10301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 na na na <10 <10301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 na na na <10 <10300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 na na na <10 <10300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 na na na <10 <10

Table 5  85
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C4-202 

Isomers, 

C4-alkylated 

fluoranthene/

pyrenes

C5-202 

Isomers, 

C5-alkylated 

fluoranthene/

pyrenes

C2-228

Isomers, 

C2-alkylated 

benz(a)-

anthracene/

chrysenes

Benzo(

b)-

fluoranthene

Benzo(

k)-

fluoranthene

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na naProbable effect concentration (PEC) - - - - na na na na na

Quality-assurance samples

Blank - - 2505R05270 na na na <10 <10

Spike, in percent recovered (acceptable range) - - 2505R05270 na na na 80.47 (49–104) 83.61 (40–101)Blank - - 2505R05285 na na na <10 <10Spike, in percent recovered (acceptable range) - - 2505R05285 na na na 86.69 (49–104) 88.73 (40–101)Blank - - 2505R05291 na na na <10 <10Spike, in percent recovered (acceptable range) - - 2505R05291 na na na 91.69 (49–104) 92.95 (40–101)Blank - - 200529904 na na na <10 <10Spike, in percent recovered (acceptable range) - - 200529904 na na na 82.62 (49–104) 83.73 (40–101)Blank - - 200532510 na na na <10 <10Spike, in percent recovered (acceptable range) - - 200532510 na na na 90.2 (49–104) 94 (40–101)Blank - - 200532603 na na na <10 <10Spike, in percent recovered (acceptable range) - - 200532603 na na na 92.1 (49–104) 93.1 (40–101)

86  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes 

Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Benzo(e)- pyrene Benzo(a)- pyrene Perylene

C1-252 

Isomers, 

C1-methylated 

benzopyrene/

perylenes

C3-228

Isomers, 

C3-benz(a)-

anthracene/

chrysenes

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 280 320 340 E320 <30

300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 270 310 300 E300 <25

300056090070301 FDL Street mud 10/03/2005 2505R05285 1,800 2,400 750 E2,000 <120

300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 E1,300 2,200 E1,100 <2,400 <1,900

300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 E810 1,400 E740 <1,700 <1,400

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 2,500 3,400 1,000 na na300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 800 1,000 400 E930 <35

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 360 460 230 E430 <65

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 340 390 290 E370 <35

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 310 350 300 E360 <60

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 140 140 270 E190 <30

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 100 110 220 E120 <25

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 31 E26 300 <55 <30

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 310 390 140 na na

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 630 700 360 E830 <220300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 62 79 42 <70 <11

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 100 120 170 <170 <40

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 47 58 150 <110 <30

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 200 250 100 na na

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 100 85 43 E100 <16300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 100 88 46 E100 <25

300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,300 E1,100 E450 <1,300 <1,300

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <18 <10

300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 40 50 30 na na

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 300 380 170 na na300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 34 39 40 <60 <16

Table 5  87
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes 

Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Benzo(e)- pyrene Benzo(a)- pyrene Perylene

C1-252 

Isomers, 

C1-methylated 

benzopyrene/

perylenes

C3-228

Isomers, 

C3-benz(a)-

anthracene/

chrysenes

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 32 44 110 <95 <30

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 33 43 130 <90 <30

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 13 19 32 <40 <13

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 <5,500 <5,500 <5,500

295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 E130 180 220 <270 <140

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 40 50 170 na na300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 270 400 120 na na300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 30 40 160 na na300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 30 50 160 na na300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 130 160 270 <170 <85

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 100 120 130 E120 <17

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 13 15 15 <17 <12

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 14 17 15 <17 <12

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 30 32 230 <55 <25

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 75 78 180 E90 <25

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 260 290 340 na na

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 60 70 100 na na300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 38 51 58 na na300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 74 78 270 E86 <25300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 29 30 500 E52 <15

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 60 73 130 <120 <30

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 40 60 170 na na301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 E10 20 110 na na301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 E10 30 120 na na301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 <10 <10 <10 na na301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 <10 <10 <10 na na300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 <10 <10 <10 na na300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 <10 <10 E7.1 na na

88  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes 

Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Benzo(e)- pyrene Benzo(a)- pyrene Perylene

C1-252 

Isomers, 

C1-methylated 

benzopyrene/

perylenes

C3-228

Isomers, 

C3-benz(a)-

anthracene/

chrysenes

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na 150 na na naProbable effect concentration (PEC) - - - - na 1,450 na na na

Quality-assurance samples

Blank - - 2505R05270 <10 <10 <10 na naSpike, in percent recovered (acceptable range) - - 2505R05270 81.79 (35–81) 77.58 (26–101) 78.94 (53–94) na naBlank - - 2505R05285 <10 <10 <10 na naSpike, in percent recovered (acceptable range) - - 2505R05285 87.23 (35–81) 83.05 (26–101) 84.73 (53–94) na naBlank - - 2505R05291 <10 <10 <10 na naSpike, in percent recovered (acceptable range) - - 2505R05291 91.25 (35–81) 83.59 (26–101) 86.50 (53–94) na naBlank - - 200529904 <10 <10 <10 na naSpike, in percent recovered (acceptable range) - - 200529904 76.29 (35–81) 76.66 (26–101) 71.95 (53–94) na naBlank - - 200532510 <10 <10 <10 na naSpike, in percent recovered (acceptable range) - - 200532510 92.7 (35–81) 87.2 (26–101) 87.0 (53–94) na naBlank - - 200532603 <10 <10 <10 na naSpike, in percent recovered (acceptable range) - - 200532603 91.9 (35–81) 86.5 (26–101) 87.2 (53–94) na na

Table 5  89
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C2-252 

Isomers, C2-

alkylated 

benzopyrene/

perylenes

C4-228

Isomers, 

C4-benz(a)-

anthracene/

chrysenes

Benzo(g,h,i)-

perylene

Indeno

(1,2,3-c,d)-

pyrene

Dibenzo(a,h)-

anthracene

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 E160 <65 260 260 77300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 E150 <60 220 240 80300056090070301 FDL Street mud 10/03/2005 2505R05285 <730 <280 1,500 1,700 470300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <2,200 <1,900 2,200 2,400 <1,900300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,500 <1,400 1,400 1,600 <1,400300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 na na 2,200 2,100 <600300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <350 <140 840 870 380300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <200 <65 320 360 96300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <210 <80 280 310 82300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <220 <55 260 270 77300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 <100 <45 130 130 56300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <70 <25 92 100 33300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 <30 <30 <30 <30301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 na na E280 270 <90

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 <460 <240 620 630 200300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <12 60 70 23300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <65 <40 95 110 52300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <45 <30 47 58 36300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 na na 190 180 <60

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 <70 <30 E61 73 24300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 <70 <30 E52 65 <14300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,400 <2,100 <1,300 <1,300 <1,300300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10 <10300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <20 <10 <10 <10 <10300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 na na 40 40 <20300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 na na 250 220 <80300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <25 <16 32 39 20

90 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C2-252 

Isomers, C2-

alkylated 

benzopyrene/

perylenes

C4-228

Isomers, 

C4-benz(a)-

anthracene/

chrysenes

Benzo(g,h,i)-

perylene

Indeno

(1,2,3-c,d)-

pyrene

Dibenzo(a,h)-

anthracene

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <35 <30 34 <30 32300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <40 <30 35 <30 32300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <15 <13 15 <13 14

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,600 <5,500 <5,500 <5,500 <5,500295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <210 <390 <140 <140 <140300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 na na E50 50 <30300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 na na 210 190 <60300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 na na 40 30 <20300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 na na 40 30 <20300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 <120 <85 150 160 110300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 <65 <35 100 110 39300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <13 <12 12 <12 <12300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <14 <12 E12 <12 <12300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 <25 28 38 E21300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <55 <18 71 77 23300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 na na 230 210 <70300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 na na E50 50 <20300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 na na E40 40 <19300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <55 <20 68 80 E31300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <30 <15 26 32 <15300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <45 <30 49 <30 39

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 na na 40 50 <30301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 na na <30 <20 <20301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 na na <30 <30 <30301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 na na <10 <10 <10301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 na na <10 <10 <10300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 na na <10 <10 <10300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 na na <10 <10 <10

Table 5  91
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C2-252 

Isomers, C2-

alkylated 

benzopyrene/

perylenes

C4-228

Isomers, 

C4-benz(a)-

anthracene/

chrysenes

Benzo(g,h,i)-

perylene

Indeno

(1,2,3-c,d)-

pyrene

Dibenzo(a,h)-

anthracene

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na na 33Probable effect concentration (PEC) - - - - na na na na na

Quality-assurance samples

Blank - - 2505R05270 na na <10 <10 <10Spike, in percent recovered (acceptable range) - - 2505R05270 na na 76.47 (37–100) 78.05 (31–107) 78.87 (21–123)Blank - - 2505R05285 na na <10 <10 <10Spike, in percent recovered (acceptable range) - - 2505R05285 na na 80.85 (37–100) 82.11 (31–107) 82.70 (21–123)Blank - - 2505R05291 na na <10 <10 <10Spike, in percent recovered (acceptable range) - - 2505R05291 na na 85.32 (37–100) 85.20 (31–107) 87.19 (21–123)Blank - - 200529904 na na <10 <10 <10Spike, in percent recovered (acceptable range) - - 200529904 na na 73.32 (37–100) 79.44 (31–107) 81.24 (21–123)Blank - - 200532510 na na <10 <10 <10Spike, in percent recovered (acceptable range) - - 200532510 na na 82.9 (37–100) 86.5 (31–107) 87.8 (21–123)Blank - - 200532603 na na <10 <10 <10Spike, in percent recovered (acceptable range) - - 200532603 na na 82.4 (37–100) 86.6 (31–107) 87.2 (21–123)

92 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes 

Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C3-252 

Isomers, 

C3-alkylated 

benzopyrene/

perylenes

C4-252 

Isomers, 

C4-alkylated 

benzopyrene/

perylenes

C5-228

Isomers, 

C5-benz(a)-

anthracene/

chrysenes

C5-252 

Isomers, 

C5-alkylated 

benzopyrene/

perylenes

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 <75 <40 <55 <100300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 <80 <45 <65 <90

300056090070301 FDL Street mud 10/03/2005 2505R05285 <250 <40 <130 <340

300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 <2,100 <1,900 <1,900 <2,100

300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 <1,400 <1,400 <1,400 <1,500

300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 na na na na300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <190 <70 <110 <230300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <90 <50 <65 <120

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 <110 <50 <60 <120

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <90 <60 <60 <100

300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 <70 <45 <65 <75

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <40 <30 <30 <40

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <30 <30 <30 <80

301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 na na na na

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 <250 <30 <200 <85300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 <14 <11 <11 <19

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 <45 <40 <40 <50

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 <35 <30 <30 <35

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 na na na na

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 <35 <17 <30 <25

300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 <40 <19 <35 <25

300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 <1,300 <1,300 <1,300 <1,300

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10

300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 <10 <10 <10 <10

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 na na na na

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 na na na na300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 <17 <16 <16 <19

Table 5  93
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes 

Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C3-252 

Isomers, 

C3-alkylated 

benzopyrene/

perylenes

C4-252 

Isomers, 

C4-alkylated 

benzopyrene/

perylenes

C5-228

Isomers, 

C5-benz(a)-

anthracene/

chrysenes

C5-252 

Isomers, 

C5-alkylated 

benzopyrene/

perylenes

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 <30300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 <30 <30 <30 <30

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 <13 <13 <13 <13

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 <5,500 <5,500 <5,500 <5,500

295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 <170 <150 <310 <180

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 na na na na300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 na na na na300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 na na na na300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 na na na na300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 <100 <85 <100 <110300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 <45 <25 <30 <45

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 <12 <12 <12 <12

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 <12 <12 <12 <12

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <25 <25 <25 <25

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 <25 <30 <35

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 na na na na300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 na na na na300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 na na na na300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 <35 <35 <30 <45300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 <19 <17 <15 <18

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 <35 <30 <30 <35

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 na na na na

301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 na na na na301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 na na na na301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 na na na na301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 na na na na300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 na na na na300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 na na na na

94  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes 

Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number

C3-252 

Isomers, 

C3-alkylated 

benzopyrene/

perylenes

C4-252 

Isomers, 

C4-alkylated 

benzopyrene/

perylenes

C5-228

Isomers, 

C5-benz(a)-

anthracene/

chrysenes

C5-252 

Isomers, 

C5-alkylated 

benzopyrene/

perylenes

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - na na na naProbable effect concentration (PEC) - - - - na na na na

Quality-assurance samples

Blank - - 2505R05270 na na na naSpike, in percent recovered (acceptable range) - - 2505R05270 na na na naBlank - - 2505R05285 na na na naSpike, in percent recovered (acceptable range) - - 2505R05285 na na na naBlank - - 2505R05291 na na na naSpike, in percent recovered (acceptable range) - - 2505R05291 na na na naBlank - - 200529904 na na na naSpike, in percent recovered (acceptable range) - - 200529904 na na na naBlank - - 200532510 na na na naSpike, in percent recovered (acceptable range) - - 200532510 na na na naBlank - - 200532603 na na na naSpike, in percent recovered (acceptable range) - - 200532603 na na na na

Table 5  95
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Sample mass (grams)

Calculated

value

Surrogates, in percent recovery

(acceptable range)

ΣPAHSQG 2-Fluorobiphenyl (0-130) Nitrobenzene-d5 (0-130) p-Terphenyl-d14 (0-105)

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 2505R05270 11.6 3,900 78.0 81.6 90.1300113090064901 NO1 dup. Street mud 9/21/2005 2505R05270 11.6 3,800 80.4 79.1 85.4300056090070301 FDL Street mud 10/03/2005 2505R05285 21.7 24,000 77.6 77.5 87.2300125090071701 E1 Suspended sediment 9/20/2005 2505R05270 0.13 15,000 78.1 72.4 95.2300136090072001 E2 Suspended sediment 9/20/2005 2505R05270 0.18 10,000 75.7 77.5 88.9300125090074400 MET Bed sediment (dredge) 9/29/2005 200532510 22.0 42,000 72.8 72.7 85.2300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 2505R05270 11.3 12,000 51.5 57.5 54.7300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 2505R05291 15.6 4,700 67.3 68.3 83.9300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 2505R05270 12.5 4,000 74.9 74.6 84.1300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 2505R05291 8.5 4,000 65.5 68.4 87.2300202090071401 E4 0–1 Bed sediment (box core) 9/21/2005 2505R05270 8.4 1,500 76.9 76.5 85.9300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 2505R05291 9.8 1,000 68.6 69.7 84.6300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 2505R05291 8.7 470 85.1 83.3 94.8301414090083900 BON Bed sediment (dredge) 9/29/2005 200532510 23.3 3,000 74.1 67.5 84.6

Zone G—London Avenue Canal

300110090400401 CD Street mud 10/03/2005 2505R05285 20.4 6,400 82.2 82.7 77.9300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529904 22.8 570 63.8 59.2 85.5300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200529904 6.6 1,100 65.8 60.5 80.3300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 200529904 8.2 450 64.8 59.6 87.5300142090045800 STJ Bed sediment (dredge) 9/26/2005 200532510 22.3 2,200 85.4 72.8 98.5

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2505R05285 27.6 1,200 80.3 83.4 83.0300355089571801 ONE dup. Street mud 10/04/2005 2505R05285 18.4 1,100 78.2 81.3 83.3300330089575801 JNK Suspended sediment 10/04/2005 2505R05285 0.20 2,600 79.8 70.8 87.2300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529904 24.2 6 57.2 54.0 77.8300337089580701 J2 0–1 dup. Bed sediment (box core) 10/10/2005 200529904 24.1 7 61.0 60.7 89.9300344089581000 JNK Bed sediment (dredge) 9/27/2005 200532510 22.3 690 84.7 83.0 92.1300344089581000 JNK Bed sediment (dredge) 10/01/2005 200532603 16.7 5,100 67.5 57.1 84.4300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 200529904 15.8 440 52.3 45.9 65.0

96  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Sample mass (grams)

Calculated

value

Surrogates, in percent recovery

(acceptable range)

ΣPAHSQG 2-Fluorobiphenyl (0-130) Nitrobenzene-d5 (0-130) p-Terphenyl-d14 (0-105)

Zone J—Jahncke Canal—Continued

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 200529904 8.3 370 61.9 58.0 83.0300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529904 8.6 370 62.9 54.1 87.1300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529904 19.3 190 59.3 57.0 83.8

Other suspended and bed sediment samples

300158090020601 H1 Suspended sediment 9/21/2005 2505R05270 0.05 14,000 66.9 67.5 86.2295808090001601 CHL Suspended sediment 10/04/2005 2505R05285 1.8 980 81.2 102 89.4300018089562300 ITC Bed sediment (dredge) 9/29/2005 200532510 10.3 660 89.4 86.8 93.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200532603 23.1 4,000 63.3 56.5 82.0300018089562300 ITC Bed sediment (dredge) 10/20/2005 200532603 10.6 440 54.0 47.2 67.7300054090014600 NAV Bed sediment (dredge) 10/05/2005 200532603 21.3 290 64.0 54.1 82.4300224090021901 H2 0–0.5 Bed sediment (box core) 9/21/2005 2505R05270 3.0 1,400 72.0 58.6 86.0300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 2505R05270 15.7 1,000 55.9 53.0 66.5300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 2505R05291 21.3 130 67.2 61.9 83.1300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 2505R05291 21.0 140 84.1 77.5 102300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 2505R05291 10.7 290 84.1 78.3 103300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 13.9 810 66.3 60.6 84.3300214090130300 ELM Bed sediment (dredge) 9/26/2005 200532510 17.6 2,800 89.1 83.0 100300214090130300 ELM Bed sediment (dredge) 9/30/2005 200532510 19.8 540 78.3 76.5 87.7300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200532510 21.9 360 83.0 78.0 92.0300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 2505R05291 7.3 810 64.1 64.9 82.3300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 2505R05291 16.3 280 69.6 66.4 88.8300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 200529904 8.2 1,100 58.1 54.5 85.4

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200532510 11.4 650 88.4 85.5 100301151090075700 MID Bed sediment (dredge) 10/04/2005 200532603 12.5 120 62.1 57.3 83.3301151090075700 MID Bed sediment (dredge) 10/20/2005 200532603 9.5 150 66.4 56.9 89.2301001089442600 RGO Bed sediment (dredge) 9/28/2005 200532603 25.0 0 74.8 69.3 84.6301001089442600 RGO Bed sediment (dredge) 10/21/2005 200532603 25.0 0 66.7 64.2 83.2300403089481300 MNT Bed sediment (dredge) 9/28/2005 200532510 23.4 13 80.9 75.3 89.7300403089481300 MNT Bed sediment (dredge) 10/21/2005 200532603 24.5 34 69.0 58.4 90.0

Table 5  97
Table 5. Polycyclic aromatic hydrocarbon compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina 

and Rita, 2005—Continued.

USGS station ID

Sample ID

and interval (cm), 

where shown

Sample type Sample date Set number Sample mass (grams)

Calculated

value

Surrogates, in percent recovery

(acceptable range)

ΣPAHSQG 2-Fluorobiphenyl (0-130) Nitrobenzene-d5 (0-130) p-Terphenyl-d14 (0-105)

Sediment-quality guidelines

Threshold effect concentration (TEC) - - - - - - 1,610 - - - - - -Probable effect concentration (PEC) - - - - - - 22,800 - - - - - -

Quality-assurance samples

Blank - - 2505R05270 - - - - 73.40 63.36 80.72Spike, in percent recovered (acceptable range) - - 2505R05270 - - - - 74.17 66.51 78.26Blank - - 2505R05285 - - - - 73.55 63.15 77.48Spike, in percent recovered (acceptable range) - - 2505R05285 - - - - 80.17 78.92 82.57Blank - - 2505R05291 - - - - 64.13 66.65 73.82Spike, in percent recovered (acceptable range) - - 2505R05291 - - - - 73.96 75.8 85.1Blank - - 200529904 - - - - 60 50 71Spike, in percent recovered (acceptable range) - - 200529904 - - - - 65.0 52.1 75.1Blank - - 200532510 - - - - 86 72 93Spike, in percent recovered (acceptable range) - - 200532510 - - - - 85.6 75.3 92.4Blank - - 200532603 - - - - 65 52 76Spike, in percent recovered (acceptable range) - - 200532603 - - - - 79.4 68.1 88.0

98  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Isopropyl- benzene (cumene) Phenol 1,4- Dichloro- benzene d- Limo- nene para- Cresol Aceto- phe- none Iso- pho- rone

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 <100 E3,100 <50 <50 <250 <100 <50

300056090070301 FDL Street mud 10/03/2005 2 <100 E1,300 E32 E190 300 E220 <50300125090071701 E1 Suspended sediment 10/03/2005 2 <100 E1,000 <50 <50 430 <100 <50300125090074400 MET Bed sediment (dredge) 9/29/2005 6 E19 E200 200 <50 620 <100 <50300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 <100 E4,400 <50 <50 24,000 <100 <50300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <100 <50 <50 <50 <250 <100 <50

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 <100 E8,100 <50 <50 <250 <100 <50

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 <100 <50 <50 <50 490 <100 <50300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <100 <50 <50 <50 <250 <100 <50

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <100 E12,000 <50 <50 1,200 <100 <50301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <100 E130 <50 <50 E43 <100 <50

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <100 E710 E47 E420 340 E190 <50300152090042701 G1 Suspended sediment 10/03/2005 2 <100 <50 <50 <50 690 E790 <50300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 E34

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <100 <50 <50 <50 E100 <100 <50

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <100 <50 <50 <50 E160 <100 <50

300355089571801 ONE dup. Street mud 10/04/2005 2 <100 <50 <50 <50 E110 <100 <50

300330089575801 JNK Suspended sediment 10/04/2005 2 <100 <50 <50 E2,500 530 E1,200 <50300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <100 <50 <50 <50 <250 <100 <50

300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <100 E480 <50 <50 E140 <100 <50

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 2005. [All concentrations in micrograms per kilogram except where indicated. ID, identifier; <, nondetection at indicated value; cm, centimeters; E, estimated value; dup., duplicate; na, not available; - -, not applicable; nd, not detected; nr, not reported by lab]

Table 6

Table 6  99
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Isopropyl- benzene (cumene) Phenol 1,4- Dichloro- benzene d- Limo- nene para- Cresol Aceto- phe- none Iso- pho- rone

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <100 <50 <50 <50 2100 E1,400 <50300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <100 E2,500 <50 <50 400 <100 <50300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <100 <50 <50 <50 <250 <100 <50

300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <100 E2,100 <50 <50 300 <100 <50300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <100 E290 <50 <50 <250 <100 <50

300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <100 E290 <50 <50 <250 <100 <50

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <100 <50 <50 <50 <250 <100 E49

300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <100 E800 <50 <50 E160 E140 <50

300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <100 E680 <50 <50 E140 <100 <50

300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <100 <50 <50 <50 E67 E65 <50

300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <100 E700 <50 <50 E160 E150 <50

300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <100 E490 <50 <50 E100 <100 <50

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <100 <50 <50 <50 <250 <100 <50

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <100 E110 <50 <50 <250 <100 <50

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <100 <50 <50 <50 <250 <100 <50

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <100 <50 <50 <50 <250 <100 <50

300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <100 E1,400 E21 <50 280 <100 <50300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <100 E520 <50 <50 E71 <100 <50

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <100 <50 <50 <50 E30 <100 <50

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <100 E5,100 <50 <50 730 <100 <50300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <100 <50 <50 <50 <250 <100 <50

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <100 <50 <50 <50 <250 <100 <50

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <100 E610 <50 <50 330 <100 <50301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <100 E310 <50 <50 E150 E120 <50

301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <100 <50 <50 <50 E130 <100 <50

100 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Isopropyl- benzene (cumene) Phenol 1,4- Dichloro- benzene d- Limo- nene para- Cresol Aceto- phe- none Iso- pho- rone

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <100 <50 <50 <50 <250 <100 <50

301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <100 <50 <50 <50 <250 <100 <50

300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <100 <50 <50 <50 <250 <100 <50

300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <100 <50 <50 <50 <250 <100 <50

Quality-assurance samples

Blank nr - - 1 <100 58 <50 <50 <250 <100 <50

Spike, in percent recovered nr - - 1 50 90 70 55 80 26 11Blank Sediment - - 2 <100 49 <50 <50 <250 <100 <50

Spike, in percent recovered Sediment - - 2 34 60 55 43 65 36 46Blank Water - - 2 <100 <50 <50 <50 <250 <100 <50

Spike, in percent recovered Water - - 2 41 60 50 46 70 49 50Blank Water - - 3 <100 <50 <50 <50 <250 <100 <50

Spike, in percent recovered Water - - 3 85 60 85 100 95 49 22Blank Sediment - - 5 <100 36 <50 <50 <250 36 <50

Spike, in percent recovered Sediment - - 5 55 70 75 65 75 50 18Blank Water - - 5 <100 <50 <50 <50 <250 <100 <50

Spike, in percent recovered Water - - 5 49 65 70 65 90 65 43Blank Sediment - - 6 <100 <50 <50 <50 <250 <100 <50

Spike, in percent recovered Sediment - - 6 38 69 63 44 108 108 48Blank Water - - 6 <100 <50 <50 <50 <250 <100 <50

Spike, in percent recovered Water - - 6 67 69 73 73 90 82 60

Table 6  101
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Cam- phor Iso- borneol Men- thol Naph- thalene Methyl salicylate Isoquino- line Indole

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 <50 <50 <50 340 <50 <100 440

300056090070301 FDL Street mud 10/03/2005 2 <50 <50 <50 760 <50 <100 810

300125090071701 E1 Suspended sediment 10/03/2005 2 <50 <50 <50 <50 <50 <100 2,900

300125090074400 MET Bed sediment (dredge) 9/29/2005 6 <50 <50 <50 3,500 <50 <100 700

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 <50 <50 280 890 <50 <100 1,700

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 240 <50 <100 540

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 <50 <50 <50 500 <50 <100 350

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 130 <50 <50 220 <50 <100 580

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 100 <50 <100 720

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 530 <50 <100 1,600

301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <50 <50 <50 E29 <50 <100 96

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <50 <50 <50 500 <50 <100 800

300152090042701 G1 Suspended sediment 10/03/2005 2 <50 <50 <50 120 <50 <100 2,700

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <50 <50 <100 <50

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 82 <50 <100 640

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 53 <50 <100 700

300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <50 <50 <50 92 <50 <100 280

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <50 <50 <50 <50 <50 <100 840

300355089571801 ONE dup. Street mud 10/04/2005 2 <50 <50 <50 <50 <50 <100 790

300330089575801 JNK Suspended sediment 10/04/2005 2 <50 <50 <50 <50 <50 <100 10,000

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <50 <50 <100 77

300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <50 <50 <50 E36 <50 <100 190

300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <50 <50 <50 <50 <50 <100 E33

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <50 E20 <50 E33 <50 <100 300

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <50 <50 <100 1,400

102 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Cam- phor Iso- borneol Men- thol Naph- thalene Methyl salicylate Isoquino- line Indole

Zone J—Jahncke Canal­—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 54 <50 <100 710

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 E12 <50 <100 E18

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <50 <50 <50 <50 <50 <100 4,800

300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <50 <50 <50 250 <50 <100 1,200

300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <50 <50 <50 85 <50 <100 98

300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <50 <50 <50 130 <50 <100 1,100

300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <50 <50 <50 E31 <50 <100 E19

300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <50 <50 <50 E35 <50 <100 57

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <50 <50 <50 110 <50 <100 600

300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 67 <50 <100 510

300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 <50 <50 <100 560

300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 62 <50 <100 440

300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 <50 <50 <100 860

300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <50 <50 <50 <50 <50 <100 250

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 E18 <50 <100 E16

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <50 <50 <50 E18 <50 <100 E16

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 E30 <50 <100 100

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 60 <50 <100 230

300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <50 <50 <50 120 <50 <100 320

300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <50 <50 <50 E45 <50 <100 340

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <50 <50 <50 E12 <50 <100 66

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 150 <50 <100 730

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 E20 <50 <100 170

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 54 <50 <100 680

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <50 <50 <50 46 <50 <100 970

301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <50 <50 <50 49 <50 <100 470

301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <50 <50 <50 55 <50 <100 190

Table 6  103
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Cam- phor Iso- borneol Men- thol Naph- thalene Methyl salicylate Isoquino- line Indole

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <50 <50 <50 <50 <100 <50

301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <50 <50 <50 <50 <100 <50

300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <50 <50 <50 <50 <50 <100 E33

300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <50 <50 <50 <50 <50 <100 <50

Quality-assurance samples

Blank nr - - 1 <50 <50 <50 <50 <50 <100 <50

Spike, in percent recovered nr - - 1 45 85 100 80 12 39 80Blank Sediment - - 2 <50 <50 <50 <50 <50 <100 <50

Spike, in percent recovered Sediment - - 2 55 75 105 75 37 53 49Blank Water - - 2 <50 <50 <50 <50 <50 <100 <50

Spike, in percent recovered Water - - 2 65 90 75 60 22 42 50Blank Water - - 3 <50 <50 <50 <50 <50 <100 <50

Spike, in percent recovered Water - - 3 75 72 25 100 32 38 65Blank Sediment - - 5 <50 <50 <50 <50 <50 <100 <50

Spike, in percent recovered Sediment - - 5 65 75 100 85 24 38 55Blank Water - - 5 <50 <50 <50 <50 <50 <100 <50

Spike, in percent recovered Water - - 5 80 80 105 80 15 43 60Blank Sediment - - 6 <50 <50 <50 <50 <50 <100 <50

Spike, in percent recovered Sediment - - 6 91 94 113 84 2.3 89 81Blank Water - - 6 <50 <50 <50 18 <50 <100 <50

Spike, in percent recovered Water - - 6 91 88 95 89 5.6 74 75

104  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number 2-Methyl- naph- thalene 1-Methyl- naph- thalene 3-Methyl- 1H-indole (skatole) 2,6- Dimethyl- naphthalene 3-tert-Butyl- 4-hydroxy- anisole (BHA)

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 94 100 220 200 <100300056090070301 FDL Street mud 10/03/2005 2 330 270 140 240 <100300125090071701 E1 Suspended sediment 10/03/2005 2 140 130 2,000 1,000 <100300125090074400 MET Bed sediment (dredge) 9/29/2005 6 2,100 1,600 <50 1,600 <100300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 300 160 610 460 <100300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 130 110 120 180 <100300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 110 71 150 190 <100300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 120 69 190 260 <100300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 E43 E46 170 110 <100300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 140 <50 <50 <50 <100301414090083900 BON Bed sediment (dredge) 9/29/2005 6 E20 E18 52 E15 <100

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 280 150 300 320 <100300152090042701 G1 Suspended sediment 10/03/2005 2 110 130 2,200 2,800 <100300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 E5.9 <100300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 E45 E38 120 100 <100300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 E32 E22 160 96 <100300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 62 61 61 66 <100

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 E23 E19 140 E38 <100300355089571801 ONE dup. Street mud 10/04/2005 2 E19 E16 220 E44 <100300330089575801 JNK Suspended sediment 10/04/2005 2 <50 <50 1,600 <50 <100300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 E3.3 <100300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <50 <50 64 E36 <100300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 E45 E45 95 66 <100300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 E13 E35 190 93 <100300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 160 130 <100

Table 6  105
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number 2-Methyl- naph- thalene 1-Methyl- naph- thalene

3-Methyl1H-indole 

(skatole)

2,6-

Dimethylnaphthalene

3-tert-Butyl-

4-hydroxyanisole (BHA)

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 E28 E27 140 78 <100300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 E7.3 E6.6 E45 E22 <100

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <50 <50 6,400 4,800 <100300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 53 E37 240 150 <100300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 E37 E26 E43 E43 <100300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 E38 E49 260 170 <100300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 E17 E11 E48 E30 <100300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 E20 E13 73 E32 <100300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 70 130 130 120 <100300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 E42 E37 140 130 <100300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 E38 E31 150 170 <100300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 E33 E27 120 120 <100300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 52 57 190 130 <100300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 E46 E27 230 98 <100300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <50 <50 E14 <50 <100300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <50 <50 76 <50 <100300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 E16 E15 84 E31 <100300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 E28 E22 140 51 <100300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 120 <50 110 110 <100300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 E20 E18 61 50 <100300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 E11 <50 E27 E22 <100300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 80 58 190 160 <100300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 E12 E10 E22 E24 <100300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 130 E47 <100

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 E21 E14 240 64 <100301151090075700 MID Bed sediment (dredge) 10/04/2005 6 E29 E20 280 80 <100301151090075700 MID Bed sediment (dredge) 10/20/2005 6 E28 E20 330 59 <100

106  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number 2-Methyl- naph- thalene 1-Methyl- naph- thalene 3-Methyl- 1H-indole (skatole) 2,6- Dimethyl- naphthalene 3-tert-Butyl- 4-hydroxy- anisole (BHA)

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <50 E17 <50 <100301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <50 E10 <50 <100300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <50 <50 E14 <50 <100300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <50 <50 E17 <50 <100Quality-assurance samples

Blank nr - - 1 <50 <50 <50 <50 <100Spike, in percent recovered nr - - 1 80 85 90 85 55Blank Sediment - - 2 <50 <50 <50 <50 <100Spike, in percent recovered Sediment - - 2 75 75 70 75 39Blank Water - - 2 <50 <50 <50 <50 <100Spike, in percent recovered Water - - 2 60 60 65 60 40Blank Water - - 3 <50 <50 <50 <50 <100Spike, in percent recovered Water - - 3 100 100 90 95 81Blank Sediment - - 5 <50 <50 <50 <50 <100Spike, in percent recovered Sediment - - 5 90 90 60 90 61Blank Water - - 5 <50 <50 <50 <50 <100Spike, in percent recovered Water - - 5 85 85 70 80 33Blank Sediment - - 6 <50 <50 <50 <50 <100Spike, in percent recovered Sediment - - 6 86 87 90 88 43Blank Water - - 6 10 <50 <50 <50 <100Spike, in percent recovered Water - - 6 91 92 82 92 34

Table 6  107
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number N,N-Diethyl- meta-toluamide (DEET) Diethyl phtha- late

4-tertOctylphenol Tributyl phos- phate Benzo- phenone Pro- meton

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 <50 <100 <50 <50 <50 <50300056090070301 FDL Street mud 10/03/2005 2 <50 <100 <50 <50 <50 <50300125090071701 E1 Suspended sediment 10/03/2005 2 <50 <100 <50 <50 <50 <50300125090074400 MET Bed sediment (dredge) 9/29/2005 6 <50 <100 <50 <50 <50 <50300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 E58 <100 270 <50 <50 <50300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 <50 <100 <50 <50 <50 <50300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <50 <100 <50 <50 <50 <50

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <50 <100 240 <50 <50 <50300152090042701 G1 Suspended sediment 10/03/2005 2 E220 <100 <50 <50 <50 <50300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <50 <100 <50 <50 <50 <50

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <50 <100 <50 <50 <50 <50300355089571801 ONE dup. Street mud 10/04/2005 2 <50 <100 <50 <50 <50 <50300330089575801 JNK Suspended sediment 10/04/2005 2 <50 <100 <50 <50 <50 <50300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <50 <100 <50 <50 <50 <50300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <50 <100 <50 <50 <50 <50300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50

108  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number N,N-Diethyl- meta-toluamide (DEET) Diethyl phtha- late 4-tert- Octyl- phenol Tributyl phos- phate Benzo- phenone Pro- meton

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 E190 <100 <50 <50 <50 <50300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <50 <100 <50 <50 <50 <50300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <50 <100 <50 <50 <50 <50300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <50 <100 <50 <50 <50 <50300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <50 <100 <50 <50 <50 <50300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <50 <100 <50 <50 <50 <50300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <50 <100 <50 <50 <50 <50300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <50 <100 <50 <50 <50 <50300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <50 <100 <50 <50 <50 <50300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <50 <100 <50 <50 <50 <50300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <50 <100 <50 <50 <50 <50300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <50 <100 <50 <50 <50 <50300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <50 <100 <50 <50 <50 <50300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <50 <100 280 <50 <50 <50300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <50 <100 <50 <50 <50 <50300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <50 <100 <50 <50 <50 <50300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <50 <100 <50 <50 <50 <50300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <50 <100 <50 <50 <50 <50

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <50 <100 <50 <50 <50 <50301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <50 <100 <50 <50 <50 <50301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <50 <100 <50 <50 <50 <50

Table 6  109
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number N,N-Diethyl- meta-toluamide (DEET) Diethyl phtha- late

4-tertOctylphenol Tributyl phos- phate Benzo- phenone Pro- meton

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <100 <50 <50 <50 <50301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <100 <50 <50 <50 <50300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <50 <100 <50 <50 <50 <50300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <50 <100 <50 <50 <50 <50Quality-assurance samples

Blank nr - - 1 <50 <100 <50 <50 <50 <50Spike, in percent recovered nr - - 1 28 65 95 120 90 90Blank Sediment - - 2 <50 <100 <50 <50 <50 <50Spike, in percent recovered Sediment - - 2 41 55 90 90 80 60Blank Water - - 2 <50 <100 <50 <50 <50 <50Spike, in percent recovered Water - - 2 60 46 95 70 75 90Blank Water - - 3 <50 <100 <50 <50 <50 <50Spike, in percent recovered Water - - 3 42 65 115 80 105 55Blank Sediment - - 5 <50 <100 <50 <50 <50 <50Spike, in percent recovered Sediment - - 5 44 39 75 70 90 42Blank Water - - 5 <50 <100 <50 <50 <50 <50Spike, in percent recovered Water - - 5 75 48 80 70 85 71Blank Sediment - - 6 <50 <100 <50 <50 <50 <50Spike, in percent recovered Sediment - - 6 92 52 97 96 98 97Blank Water - - 6 <50 <100 <50 <50 <50 <50Spike, in percent recovered Water - - 6 91 87 104 89 91 90

110 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Atrazine para- Nonylphenol (total) Tris(2- chloroethyl) phosphate 4-n- Octyl- phenol Penta- chloro- phenol Diazi- non

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 <100 <500 <100 <50 <500 <50

300056090070301 FDL Street mud 10/03/2005 2 <100 <500 <100 <50 <500 <50

300125090071701 E1 Suspended sediment 10/03/2005 2 <100 <500 <100 <50 <500 <50

300125090074400 MET Bed sediment (dredge) 9/29/2005 6 <100 E5,000 <100 <50 <500 <50

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 <100 E2,900 <100 <50 <500 <50

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <100 E2,300 <100 <50 <500 <50

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 <100 <500 <100 <50 <500 <50

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 <100 E2,700 <100 <50 <500 <50

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <100 <500 <100 <50 <500 <50

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <100 <500 <100 <50 <500 <50

301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <100 <500 <100 <50 <500 <50

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <100 E12,000 <100 <50 <500 <50

300152090042701 G1 Suspended sediment 10/03/2005 2 <100 <500 <100 <50 <500 <50

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <100 <500 <100 <50 <500 <50

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <100 <500 <100 <50 <500 <50

300355089571801 ONE dup. Street mud 10/04/2005 2 <100 <500 <100 <50 <500 <50

300330089575801 JNK Suspended sediment 10/04/2005 2 <100 <500 <100 <50 <500 <50

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <100 <500 <100 <50 <500 <50

300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <100 <500 <100 <50 <500 <50

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

Table 6  111
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Atrazine para- Nonylphenol (total) Tris(2- chloroethyl) phosphate

4-nOctylphenol Penta- chloro- phenol Diazi- non

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <100 <500 <100 <50 <500 <50

300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <100 <500 <100 <50 <500 <50

300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <100 <500 <100 <50 <500 <50

300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <100 <500 <100 <50 <500 <50

300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <100 <500 <100 <50 <500 <50

300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <100 <500 <100 <50 <500 <50

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <100 <500 <100 <50 <500 <50

300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <100 <500 <100 <50 <500 <50

300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <100 <500 <100 <50 <500 <50

300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <100 <500 <100 <50 <500 <50

300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <100 <500 <100 <50 <500 <50

300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <100 <500 <100 <50 <500 <50

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <100 <500 <100 <50 <500 <50

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <100 <500 <100 <50 <500 <50

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <100 <500 <100 <50 <500 <50

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <100 <500 <100 <50 <500 <50

300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <100 E15,000 <100 <50 <500 <50

300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <100 <500 <100 <50 <500 <50

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <100 <500 <100 <50 <500 <50

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <100 <500 <100 <50 <500 <50

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <100 E900 <100 <50 <500 <50

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <100 <500 <100 <50 <500 <50

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <100 <500 <100 <50 <500 <50

301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <100 <500 <100 <50 <500 <50

301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <100 <500 <100 <50 <500 <50

112 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Atrazine para- Nonylphenol (total) Tris(2- chloroethyl) phosphate 4-n- Octyl- phenol Penta- chloro- phenol Diazi- non

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <100 <500 <100 <50 <500 <50

301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <100 <500 <100 <50 <500 <50

300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <100 <500 <100 <50 <500 <50

300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <100 <500 <100 <50 <500 <50

Quality-assurance samples

Blank nr - - 1 <100 <500 <100 <50 <500 <50

Spike, in percent recovered nr - - 1 100 60 36 95 55 110

Blank Sediment - - 2 <100 <500 <100 <50 <500 <50Spike, in percent recovered Sediment - - 2 90 E72 46 90 35 75Blank Water - - 2 <100 <500 <100 <50 <500 <50

Spike, in percent recovered Water - - 2 85 E67 38 65 30 70Blank Water - - 3 <100 <500 <100 <50 <500 <50

Spike, in percent recovered Water - - 3 75 108 24 115 21 65Blank Sediment - - 5 <100 <500 <100 <50 <500 <50

Spike, in percent recovered Sediment - - 5 65 E82 30 65 58 70Blank Water - - 5 <100 <500 <100 <50 <500 <50

Spike, in percent recovered Water - - 5 65 E82 48 80 70 70Blank Sediment - - 6 <100 <500 <100 <50 <500 <50

Spike, in percent recovered Sediment - - 6 100 96 65 93 0 82

Blank Water - - 6 <100 <500 <100 <50 <500 <50

Spike, in percent recovered Water - - 6 97 87 73 88 13 99

Table 6  113
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Phenan- threne Anthra- cene Carba- zole Octylphenol, monoethoxy (OPEO1) Acetyl hexamethyl tetrahydro- naphthalene (AHTN)

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 1,000 340 nd <250 <50300056090070301 FDL Street mud 10/03/2005 2 6,700 2,200 600 <250 <50300125090071701 E1 Suspended sediment 10/03/2005 2 900 470 130 <250 <50300125090074400 MET Bed sediment (dredge) 9/29/2005 6 46,000 10,000 5,500 <250 E26300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 720 320 71 E340 13300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 1,400 490 150 <250 <50300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 930 370 130 <250 <50300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 940 370 110 <250 <50300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 270 120 <50 <250 <50300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 820 200 200 <250 <50301414090083900 BON Bed sediment (dredge) 9/29/2005 6 650 140 <50 <250 <50

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 1,000 690 180 <250 <50300152090042701 G1 Suspended sediment 10/03/2005 2 500 270 140 <250 1,600300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 57 E18 <50 <250 <50300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 230 100 <50 <250 <50300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 100 54 <50 <250 <50300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 920 180 <50 <250 <50

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 260 120 70 <250 <50300355089571801 ONE dup. Street mud 10/04/2005 2 220 110 63 <250 <50300330089575801 JNK Suspended sediment 10/04/2005 2 <50 <50 <50 <250 <50300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 11 E4.2 <50 <250 <50300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 110 50 <50 <250 <50300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 240 160 <50 <250 <50300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 74 52 <50 <250 <50300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 92 E42 <50 <250 <50

114  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Phenan- threne Anthra- cene Carba- zole Octylphenol, monoethoxy (OPEO1) Acetyl hexamethyl tetrahydro- naphthalene (AHTN)

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 89 E30 <50 <250 <50300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 E39 E24 <50 <250 <50

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <50 <50 170 <250 <50300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 220 86 E44 <250 <50300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 1,400 380 180 <250 <50300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 160 100 E38 <250 <50300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 E47 E37 <50 <250 <50300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 58 E42 <50 <250 <50300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 370 170 nd <250 <50300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 200 89 E23 <250 <50300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 190 67 E28 <250 <50300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 210 66 E23 <250 <50300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 200 64 E22 <250 <50300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 110 94 E18 <250 <50300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 56 <50 <50 <250 <50300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 59 E9.2 <50 <250 <50300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 E22 E17 <50 <250 <50300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 210 89 <50 E2,500 <50300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 340 190 52 <250 E16300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 140 E43 <50 <250 <50300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 51 E14 <50 <250 <50300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 320 110 <50 <250 <50300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 E40 E14 <50 <250 <50300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 340 240 <50 <250 <50

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 81 E29 <50 <250 <50301151090075700 MID Bed sediment (dredge) 10/04/2005 6 130 E29 <50 <250 <50301151090075700 MID Bed sediment (dredge) 10/20/2005 6 83 E27 <50 <250 <50

Table 6  115
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Phenan- threne Anthra- cene Carba- zole Octylphenol, monoethoxy (OPEO1) Acetyl hexamethyl tetrahydro- naphthalene (AHTN)

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <50 <50 <250 <50301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <50 <50 <250 <50300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 E5.2 E1.6 <50 <250 <50300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 E9.3 E2.4 <50 <250 <50Quality-assurance samples

Blank nr - - 1 <50 <50 <50 <250 <50Spike, in percent recovered nr - - 1 95 90 105 113 120Blank Sediment - - 2 <50 <50 <50 <250 <50Spike, in percent recovered Sediment - - 2 90 80 105 E80 100Blank Water - - 2 <50 <50 <50 <250 <50Spike, in percent recovered Water - - 2 70 70 75 E71 70Blank Water - - 3 <50 <50 <50 <250 <50Spike, in percent recovered Water - - 3 100 100 105 750 95Blank Sediment - - 5 <50 <50 <50 <250 <50Spike, in percent recovered Sediment - - 5 90 80 90 E75 90Blank Water - - 5 <50 <50 <50 <250 <50Spike, in percent recovered Water - - 5 85 80 85 E75 90Blank Sediment - - 6 <50 <50 <50 <250 <50Spike, in percent recovered Sediment - - 6 100 99 99 96 107Blank Water - - 6 <50 <50 <50 <250 <50Spike, in percent recovered Water - - 6 101 94 97 98 101

116  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number 4-Cumyl- phenol Hexahydrohexamethyl- cyclopentabenzopyran (HHCB) Metalaxyl Bro- macil Metola- chlor

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 <50 <50 <50 <500 <50300056090070301 FDL Street mud 10/03/2005 2 <50 <50 <50 <500 <50

300125090071701 E1 Suspended sediment 10/03/2005 2 <50 <50 <50 <500 <50

300125090074400 MET Bed sediment (dredge) 9/29/2005 6 <50 E30 <50 <500 <50

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 10 10 <50 <500 <50

300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 <50 <50 <50 <500 <50

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <50 <50 <50 <500 <50

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <50 <50 <50 <500 <50

300152090042701 G1 Suspended sediment 10/03/2005 2 <50 440 <50 <500 <50

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <50 <50 <50 <500 <50

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <50 <50 <50 <500 <50

300355089571801 ONE dup. Street mud 10/04/2005 2 <50 <50 <50 <500 <50

300330089575801 JNK Suspended sediment 10/04/2005 2 <50 <50 <50 <500 <50

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <50 <50 <50 <500 <50

300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <50 <50 <50 <500 <50

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

Table 6  117
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number

4-Cumylphenol Hexahydrohexamethyl- cyclopentabenzopyran (HHCB) Metalaxyl Bro- macil Metola- chlor

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <50 <50 <50 <500 <50

300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <50 <50 <50 <500 <50

300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <50 <50 <50 <500 <50

300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <50 <50 <50 <500 <50

300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <50 <50 <50 <500 <50

300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <50 <50 <50 <500 <50

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <50 <50 <50 <500 <50

300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 <500 <50

300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 <500 <50

300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 <500 <50

300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <50 <50 <50 <500 <50

300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <50 <50 <50 <500 <50

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <50 <50 <50 <500 <50

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <50 E13 <50 <500 <50

300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <50 <50 <50 <500 <50

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <50 <50 <50 <500 <50

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <50 <50 <50 <500 <50

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <50 <500 <50

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <50 <50 <50 <500 <50

301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <50 <50 <50 <500 <50

301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <50 <50 <50 <500 <50

118  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number 4-Cumyl- phenol Hexahydrohexamethyl- cyclopentabenzopyran (HHCB) Metalaxyl Bro- macil Metola- chlor

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <50 <50 <500 <50301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <50 <50 <500 <50

300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <50 <50 <50 <500 <50

300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <50 <50 <50 <500 <50

Quality-assurance samples

Blank nr - - 1 <50 <50 <50 <500 <50

Spike, in percent recovered nr - - 1 95 100 30 42 100Blank Sediment - - 2 <50 <50 <50 <500 <50

Spike, in percent recovered Sediment - - 2 95 70 46 58 95Blank Water - - 2 <50 <50 <50 <500 <50

Spike, in percent recovered Water - - 2 65 60 42 63 70Blank Water - - 3 <50 <50 <50 <500 <50

Spike, in percent recovered Water - - 3 90 75 16 70 105Blank Sediment - - 5 <50 <50 <50 <500 <50

Spike, in percent recovered Sediment - - 5 75 75 38 54 90Blank Water - - 5 <50 <50 <50 <500 <50

Spike, in percent recovered Water - - 5 80 70 50 63 85Blank Sediment - - 6 <50 <50 <50 <500 <50

Spike, in percent recovered Sediment - - 6 94 90 50 82 100Blank Water - - 6 <50 <50 <50 <500 <50

Spike, in percent recovered Water - - 6 88 86 93 89 93

Table 6  119
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Chlor- pyrifos Anthra- quinone Nonylphenol, monoethoxy (total, NPEO1) Fluoran- thene Triclo- san Pyrene

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 <50 180 <500 2,100 <50 1,600300056090070301 FDL Street mud 10/03/2005 2 <50 1,000 <500 10,000 <50 9,400300125090071701 E1 Suspended sediment 10/03/2005 2 <50 <50 <500 1,900 <50 2,000300125090074400 MET Bed sediment (dredge) 9/29/2005 6 <50 5,100 <500 42,000 <50 32,000300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 <50 94 E590 1,400 <50 1,300300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <50 290 E760 3,100 <50 2,600300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 <110 270 <500 2,500 <50 2,100300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 <50 300 E760 2,300 <50 1,900300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <50 140 <500 620 <50 550300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <500 520 <50 400301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <50 260 <500 1,500 <50 1,300

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <50 450 <500 3,200 <50 2,800300152090042701 G1 Suspended sediment 10/03/2005 2 <50 720 <500 900 <50 1,100300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <50 E23 <500 150 <50 130300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <50 140 <500 590 <50 510300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <50 72 <500 250 <50 240300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <50 150 <500 1,300 <50 1,100

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <50 220 <500 810 <50 640300355089571801 ONE dup. Street mud 10/04/2005 2 <50 220 <500 700 <50 540300330089575801 JNK Suspended sediment 10/04/2005 2 <50 1,100 <500 <50 <50 <50

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <500 E23 <50 E17

300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <50 E38 <500 280 <50 230300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <50 66 <500 790 <50 670300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <50 58 <500 240 <50 190300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <50 69 <500 220 <50 180

120 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Chlor- pyrifos Anthra- quinone Nonylphenol, monoethoxy (total, NPEO1) Fluoran- thene Triclo- san Pyrene

Zone J—Jahncke Canal­—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <50 65 <500 210 <50 190300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <50 E20 <500 96 <50 78

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <50 1,600 <500 880 <50 890300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <50 94 <500 350 <50 280300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <50 290 <500 2,600 <50 2,400300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <50 68 <500 370 <50 350300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <50 E23 <500 110 <50 170300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <50 E26 <500 180 <50 240300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <50 100 <500 1,200 <50 1,200300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <50 98 <500 390 <50 360300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <50 67 <500 360 <50 350300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <50 68 <500 360 <50 360300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <50 83 <500 410 <50 390300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <50 72 <500 370 <50 340300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <50 E22 <500 81 <50 56300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <50 E22 <500 76 <50 54300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <50 E29 <500 93 <50 87300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <50 84 <500 390 <50 330300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <50 160 <500 1,400 <50 1,200300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <50 82 <500 280 <50 230300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <50 E27 <500 120 <50 100300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <50 170 <500 420 <50 350300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <50 E35 <500 100 <50 110300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <50 100 <500 660 <50 520

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <50 E44 <500 95 <50 110301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <50 82 <500 130 <50 120301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <50 56 <500 96 <50 92

Table 6  121
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Chlor- pyrifos Anthra- quinone Nonylphenol, monoethoxy (total, NPEO1) Fluoran- thene Triclo- san Pyrene

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <50 <500 <50 <50 <50

301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <50 <500 E3.9 <50 E3.4

300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <50 <50 <500 E13 <50 E10

300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <50 <50 <500 E13 <50 E11

Quality-assurance samples

Blank nr - - 1 <50 <50 <500 <50 <50 <50

Spike, in percent recovered nr - - 1 90 85 62 100 120 95Blank Sediment - - 2 <50 <50 <500 <50 <50 <50

Spike, in percent recovered Sediment - - 2 55 75 E61 95 95 95Blank Water - - 2 <50 <50 <500 <50 <50 <50

Spike, in percent recovered Water - - 2 40 65 E58 75 65 75Blank Water - - 3 <50 <50 <500 <50 <50 <50

Spike, in percent recovered Water - - 3 44 90 67 95 70 95Blank Sediment - - 5 <50 <50 <500 2.4 <50 2.3Spike, in percent recovered Sediment - - 5 44 80 E54 90 90 90Blank Water - - 5 <50 <50 <500 <50 <50 <50

Spike, in percent recovered Water - - 5 50 80 E54 85 90 85Blank Sediment - - 6 <50 <50 <500 <50 <50 <50

Spike, in percent recovered Sediment - - 6 64 99 94 104 103 104Blank Water - - 6 <50 <50 <500 <50 <50 <50

Spike, in percent recovered Water - - 6 70 67 100 100 99 97

122 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Octylphenol, diethoxy (OPEO2) Bisphenol A Nonylphenol, diethoxy (total, NPEO2) Tris(dichloro- isopropyl) phosphate Tris- (2-butoxyethyl) phosphate

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 E150 E140 <1,000 <100 <100

300056090070301 FDL Street mud 10/03/2005 2 <50 <50 <1,000 <100 <100

300125090071701 E1 Suspended sediment 10/03/2005 2 <50 E660 <1,000 <100 <100

300125090074400 MET Bed sediment (dredge) 9/29/2005 6 <50 <50 <1,000 <100 <100

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 <50 E150 E550 24 170300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <50 E110 <1,000 <100 <100

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 E130 <50 <1,000 <100 <100

300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 <50 E22 <1,000 <100 <100

300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <1,000 <100 <100

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <1,000 <100 <100

301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <50 <50 <1,000 <100 <100

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <50 <50 <1,000 <100 <100

300152090042701 G1 Suspended sediment 10/03/2005 2 <50 <50 <1,000 <100 <100

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <50 E150 <1,000 <100 <100

300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <50 <50 <1,000 <100 <100

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <50 <50 <1,000 E39 <100

300355089571801 ONE dup. Street mud 10/04/2005 2 <50 <50 <1,000 <100 <100

300330089575801 JNK Suspended sediment 10/04/2005 2 <50 E2,500 <1,000 <100 <100

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <50 <50 <1,000 <100 <100

300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <50 E110 <1,000 <100 <100

300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

Table 6  123
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Octylphenol, diethoxy (OPEO2) Bisphenol

A

Nonylphenol, 

diethoxy

(total, NPEO2)

Tris(dichloroisopropyl) 

phosphate

Tris-

(2-butoxyethyl) 

phosphate

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <50 E7,000 <1,000 <100 <100

300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <50 <50 <1,000 <100 <100

300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <50 E35 <1,000 <100 <100

300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <50 <50 <1,000 <100 <100

300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <50 <50 <1,000 <100 <100

300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <50 <50 <1,000 <100 <100

300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <50 E180 <1,000 <100 <100

300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <50 <50 <1,000 <100 <100

300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <50 E51 <1,000 <100 <100

300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <50 E28 <1,000 <100 <100

300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <50 <50 <1,000 <100 <100

300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <50 <50 <1,000 <100 <100

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <50 <50 <1,000 <100 <100

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <50 <50 <1,000 <100 <100

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <1,000 <100 <100

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <1,000 <100 <100

300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <50 E51 <1,000 <100 <100

300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <50 <50 <1,000 <100 <100

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <50 <50 <1,000 <100 <100

300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <50 <1,000 <100 <100

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <50 <50 <1,000 <100 <100

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <50 <50 <1,000 <100 <100

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <50 <50 <1,000 <100 <100

301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <50 <50 <1,000 <100 <100

301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <50 <50 <1,000 <100 <100

124  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Octylphenol, diethoxy (OPEO2) Bisphenol A Nonylphenol, diethoxy (total, NPEO2) Tris(dichloro- isopropyl) phosphate Tris- (2-butoxyethyl) phosphate

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <50 <1,000 <100 <100

301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <50 <1,000 <100 <100

300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <50 E4.1 <1,000 <100 <100

300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <50 <50 <1,000 <100 <100

Quality-assurance samples

Blank nr - - 1 <50 <50 <1,000 <100 <100

Spike, in percent recovered nr - - 1 78 85 70 60 135

Blank Sediment - - 2 <50 <50 <1,000 <100 <100

Spike, in percent recovered Sediment - - 2 E85 30 E77 32 80Blank Water - - 2 <50 <50 <1,000 <100 <100

Spike, in percent recovered Water - - 2 E60 30 E69 38 51

Blank Water - - 3 <50 <50 <1,000 <100 <100Spike, in percent recovered Water - - 3 90 55 48 28 75Blank Sediment - - 5 <50 <50 <1,000 <100 <100Spike, in percent recovered Sediment - - 5 E65 37 E93 31 75

Blank Water - - 5 <50 <50 <1,000 <100 <100Spike, in percent recovered Water - - 5 E60 34 E86 31 80

Blank Sediment - - 6 <50 <50 <1,000 <100 <100

Spike, in percent recovered Sediment - - 6 103 13 100 34 84

Blank Water - - 6 <50 <50 <1,000 <100 <100

Spike, in percent recovered Water - - 6 109 20 107 41 104

Table 6  125
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Triphenyl phosphate Diethyl- hexyl phthalate Tetrabromo- diphenyl ether Benzo[a]- pyrene

3-betaCoprostanol Choles- terol

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 <50 650 <50 530 630 1,800300056090070301 FDL Street mud 10/03/2005 2 <50 830 <50 3,900 540 E2,300300125090071701 E1 Suspended sediment 10/03/2005 2 <50 nr <50 940 8,800 E74,000300125090074400 MET Bed sediment (dredge) 9/29/2005 6 <50 3,500 <50 8,600 <500 700300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 E10 3,400 <50 2,000 2,600 4,000300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 <50 870 <50 1,000 1,600 E4,800300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 <50 17,000 <50 740 750 4,000300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 <50 860 <50 610 2,000 E7,300300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 <50 <250 <50 240 <500 E3,900

300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 <50 <250 <50 <50 <500 E10,000

301414090083900 BON Bed sediment (dredge) 9/29/2005 6 <50 E230 <50 810 <500 790

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 <50 5,000 <50 1,500 3,200 E7,900

300152090042701 G1 Suspended sediment 10/03/2005 2 <50 nr <50 580 13,000 E150,000300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 73 E110 E850

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 230 620 E5,600300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 110 <500 E4,200

300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 <50 440 <50 640 <500 1,600

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 <50 400 <50 200 <500 E2,200

300355089571801 ONE dup. Street mud 10/04/2005 2 <50 390 <50 160 <500 E3,400

300330089575801 JNK Suspended sediment 10/04/2005 2 E200 nr <50 <50 <500 E26,000

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 E5.9 <500 <250

300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 <50 1,900 <50 100 <500 970

300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 <50 390 <50 280 <500 2,100300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 94 530 E6,600

300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 78 <500 E5,800

126  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Triphenyl phosphate Diethyl- hexyl phthalate Tetrabromo- diphenyl ether Benzo[a]- pyrene 3-beta- Copro- stanol Choles- terol

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 75 <500 E5,300

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 E24 <500 E2,100

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 <50 nr <50 <50 <500 E320,000

300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 <50 <250 <50 84 <500 1,400300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 <50 <250 <50 1,000 <500 800300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 <50 <250 <50 120 <500 1,200300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 <50 <250 <50 130 <500 710300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 <50 <250 <50 180 <500 710300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 <50 14,000 <50 690 <500 3,300300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 <50 E180 <50 140 E380 E4,800300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 <50 E140 <50 150 720 E5,000300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 <50 E110 <50 130 560 E4,900300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 <50 E140 <50 160 <500 E3,100

300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 <50 E195 <50 160 <500 3,100

300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 <50 <250 <50 E26 <500 E490

300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 <50 <250 <50 E35 <500 750300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 <50 <250 <50 E33 <500 E1,400

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <250 <50 130 <500 E2,000

300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 <50 420 <50 420 <500 530

300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 <50 800 <50 110 <500 1,000300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 <50 <250 <50 57 <500 960300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 <50 <250 <50 110 <500 E2,300300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 <50 <250 <50 E49 E120 E1,000

300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 <50 <250 <50 120 <500 E5,300

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 <50 3300 <50 51 610 2,700301151090075700 MID Bed sediment (dredge) 10/04/2005 6 <50 <250 <50 60 870 3,000301151090075700 MID Bed sediment (dredge) 10/20/2005 6 <50 <250 <50 62 810 3,500

Table 6  127
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Triphenyl phosphate Diethyl- hexyl phthalate Tetrabromo- diphenyl ether Benzo[a]- pyrene

3-betaCoprostanol Choles- terol

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <50 <250 <50 <50 <500 <250

301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <50 <250 <50 <50 <500 <250

300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 <50 <250 <50 E3.4 <500 E140

300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <50 <250 <50 <50 <500 <250

Quality-assurance samples

Blank nr - - 1 <50 430 <50 <50 <500 <250

Spike, in percent recovered nr - - 1 55 130 120 105 138 138Blank Sediment - - 2 <50 38 <50 <50 <500 <250

Spike, in percent recovered Sediment - - 2 54 130 90 90 65 E59Blank Water - - 2 <50 37 <50 <50 <500 <250

Spike, in percent recovered Water - - 2 42 80 70 70 90 E128Blank Water - - 3 <50 <250 <50 <50 <500 <250

Spike, in percent recovered Water - - 3 34 135 85 100 105 79Blank Sediment - - 5 <50 63 <50 <50 <500 <250

Spike, in percent recovered Sediment - - 5 27 95 85 90 61 E85Blank Water - - 5 <50 74 <50 <50 <500 <250

Spike, in percent recovered Water - - 5 34 135 80 80 63 E81Blank Sediment - - 6 <50 <250 <50 <50 <500 <250

Spike, in percent recovered Sediment - - 6 46 102 119 103 127 93Blank Water - - 6 <50 91 <50 <50 <500 <250

Spike, in percent recovered Water - - 6 54 122 115 99 141 95

128  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number beta- Sitos- terol beta- Stig- masta- nol 3,4- Dichloro- phenyl isocyanate Surrogates (percent recovery) Decafluoro- biphenyl Fluoran- thene-d10 Bisphenol A-d3

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 1 2,900 1,700 na 26.8 60.8 54.6300056090070301 FDL Street mud 10/03/2005 2 E8,100 E3,500 na 38.0 94.4 74.8300125090071701 E1 Suspended sediment 10/03/2005 2 E40,000 <500 na 41.5 82.8 63.0300125090074400 MET Bed sediment (dredge) 9/29/2005 6 2,700 940 <100 37.6 100 125300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 1 5,500 1,700 na 26.3 42.1 43.5300136090072001 E2 0–1 Bed sediment (box core) 10/09/2005 5 E5,900 E2,400 na 30.9 89.6 50.8300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 1 4,200 2,100 na 19.0 64.1 61.5300144090072001 E3 0–2 Bed sediment (box core) 10/09/2005 5 E6700 E3,100 na 18.8 84.0 45.6300202090071401 E4 0–2 Bed sediment (box core) 10/09/2005 5 E6,000 E3,300 na 22.7 77.5 38.4300143090081401 E5 0–2 Bed sediment (box core) 10/09/2005 5 E5,700 E5,100 na 25.9 80.7 44.8301414090083900 BON Bed sediment (dredge) 9/29/2005 6 670 <500 <100 59.3 114 11.4

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 2 E9,900 E4,400 na 39.7 88.7 73.2300152090042701 G1 Suspended sediment 10/03/2005 2 E38,000 <500 na 35.6 93.9 59.8300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 5 E1,000 E420 na 15.8 63.2 19.7300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 5 E5,300 E2,900 na 27.6 80.4 29.2300243090043501 G4 0–2 Bed sediment (box core) 10/10/2005 5 E3,600 E2,200 na 26.7 82.0 33.2300142090045800 STJ Bed sediment (dredge) 9/26/2005 6 4,000 <500 <100 61.9 107 13.5

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 2 E4,600 E1,300 na 29.1 92.8 42.4300355089571801 ONE dup. Street mud 10/04/2005 2 E6,800 E1,700 na 47.1 82.7 67.7300330089575801 JNK Suspended sediment 10/04/2005 2 E29,000 <500 na 39.4 86.0 46.7300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 5 <500 <500 na 15.9 78.8 10.6300344089581000 JNK Bed sediment (dredge) 9/27/2005 6 1,400 <500 <100 46.6 115 18.8300344089581000 JNK Bed sediment (dredge) 10/01/2005 6 2,000 860 <100 56.3 70.8 24.1300344089581701 J3 0–1 Bed sediment (box core) 10/10/2005 5 E5,600 E2,700 na 16.1 77.5 31.0300342089584101 J7 0–1 Bed sediment (box core) 10/10/2005 5 E4,400 E2,600 na 23.0 80.6 33.9

Table 6  129
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number beta- Sitos- terol beta- Stig- masta- nol

3,4-

Dichlorophenyl 

isocyanate

Surrogates

(percent recovery)

Decafluorobiphenyl Fluoran- thene-d10 Bisphenol A-d3

Zone J—Jahncke Canal—Continued

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 5 E4,000 E2,400 na 26.1 88.1 20.9300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 5 E1,400 E830 na 22.3 77.8 6.4

Other suspended and bed sediment samples

295808090001601 CHL Suspended sediment 10/04/2005 2 E260,000 <500 na 43.9 93.3 30.2

300018089562300 ITC Bed sediment (dredge) 9/29/2005 6 2,400 1,500 <100 52.7 117 13.4300018089562300 ITC Bed sediment (dredge) 10/05/2005 6 880 <500 <100 52.2 128 46.2300018089562300 ITC Bed sediment (dredge) 10/20/2005 6 3,600 2,600 <100 12.2 101 23.7300054090014600 NAV Bed sediment (dredge) 10/05/2005 6 1,600 960 <100 54.9 108 21.7300054090014600 NAV dup. Bed sediment (dredge) 10/05/2005 6 1,800 1,000 <100 52.1 109 23.6300224090021901 H2 1–2 Bed sediment (box core) 9/21/2005 1 3,600 <500 na 31.2 62.4 50.6300224090021901 H2 0–1 Bed sediment (box core) 10/03/2005 2 E3,500 E2,800 na 36.3 86.2 31.4300224090021901 H2 1–2 Bed sediment (box core) 10/03/2005 2 E3,900 E2,400 na 52.4 76.7 39.5300224090021901 H2 2–3 Bed sediment (box core) 10/03/2005 2 E3,600 E2,600 na 36.2 89.4 40.0300224090021901 H2 7–9 Bed sediment (box core) 10/03/2005 2 E3,200 E2,500 na 41.1 81.4 73.0300224090021901 H2 7–9 dup. Bed sediment (box core) 10/03/2005 3 3,000 2,000 na 38.4 68.3 29.9300123090104301 D1 0–0.5 Bed sediment (box core) 10/09/2005 5 E1,000 E780 na 22.3 74.4 12.2300123090104301 D1 0–0.5 dup. Bed sediment (box core) 10/09/2005 3 750 600 na 32.9 57.0 20.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 5 E1,400 <500 na 20.7 71.3 26.1300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 5 E3,800 E2,300 na 32.9 68.5 30.3300214090130300 ELM Bed sediment (dredge) 9/26/2005 6 1,400 <500 <100 49.1 115 33.2300214090130300 ELM Bed sediment (dredge) 9/30/2005 6 1,300 <500 <100 44.9 116 24.9300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 6 700 <500 <100 87.9 117 18.0300236090144101 B1 0–2 Bed sediment (box core) 10/09/2005 5 E4,800 E3,400 na 26.2 85.0 42.4300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 5 E1,400 E1,100 na 18.0 70.7 24.4300445089565501 K1 0–1 Bed sediment (box core) 10/10/2005 5 E4,700 E2,600 na 25.6 84.8 13.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 6 1,900 1,200 <100 45.3 122 21.6301151090075700 MID Bed sediment (dredge) 10/04/2005 6 2,100 1,400 <100 62.0 119 30.1301151090075700 MID Bed sediment (dredge) 10/20/2005 6 2,900 2,500 <100 65.9 121 27.1

130 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 6. Urban waste indicator compound concentrations in sediment samples from Lake Pontchartrain and New Orleans, Louisiana, following Hurricanes Katrina and Rita, 

2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number beta- Sitos- terol beta- Stig- masta- nol 3,4- Dichloro- phenyl isocyanate Surrogates (percent recovery) Decafluoro- biphenyl Fluoran- thene-d10 Bisphenol A-d3

Mid-lake reference site samples—Continued

301001089442600 RGO Bed sediment (dredge) 9/28/2005 6 <500 <500 <100 11.1 121 14.4301001089442600 RGO Bed sediment (dredge) 10/21/2005 6 <500 <500 <100 23.4 126 15.1300403089481300 MNT Bed sediment (dredge) 9/28/2005 6 E80 <500 <100 35.6 126 13.4300403089481300 MNT Bed sediment (dredge) 10/21/2005 6 <500 <500 <100 17.0 118 16.2Quality-assurance samples

Blank nr - - 1 <500 <500 na 29.3 62.4 36.9Spike, in percent recovered nr - - 1 125 125 na 45.5 61.8 55.2Blank Sediment - - 2 <500 <500 na 42.4 77.9 30.2Spike, in percent recovered Sediment - - 2 E53 E41 na 32.6 75.8 18.0Blank Water - - 2 <500 <500 na 32.9 84.2 18.0Spike, in percent recovered Water - - 2 E101 E95 na 46.0 61.1 67.2Blank Water - - 3 <500 <500 na 44.9 73.8 21.3Spike, in percent recovered Water - - 3 53 47 na 42.2 77.9 24.3Blank Sediment - - 5 <500 <500 na 34.9 80.1 20.0Spike, in percent recovered Sediment - - 5 E63 E80 na 32.5 75.1 21.4Blank Water - - 5 <500 <500 na 31.8 70.1 19.2Spike, in percent recovered Water - - 5 E77 E78 na 39.2 75.7 19.6Blank Sediment - - 6 <500 <500 <100 64.1 134 18.9Spike, in percent recovered Sediment - - 6 127 128 12 66.1 127 13.4Blank Water - - 6 <500 <500 <100 22.9 80.7 16.0Spike, in percent recovered Water - - 6 125 132 54 102 116 13.2

Table 6  131
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number 1-Naphthol 2,6-Diethyl- aniline 2-Chloro- 2,6-diethyl- acetanilide 2-Ethyl-6- methyl- aniline

3,4-Dichloroaniline

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 E2.9 <30 <1.0 <30 <75300056090070301 FDL Street mud 10/03/2005 200529105 <10 <30 <17 <30 <75300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <10 <30 <49.3 <30 E41300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 E10 <30 <1.0 <30 <75300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 E11 <30 <1.0 <30 <75300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <10 <30 <1.0 <30 <75301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <10 <30 <1.0 <30 <75

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <10 <30 <8.1 <30 <75300110090040401 CD dup. Street mud 10/03/2005 200529105 <10 <30 <22 <30 <75300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <30 <1.0 <30 E.93300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <10 <30 <1.0 <30 <75300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <10 <30 <1.0 <30 <75

Zone J— Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <10 <30 <1.0 <30 <75300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <30 <1.0 <30 <75300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <10 <30 <1.0 <30 <75300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <10 <30 <1.0 <30 <75300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <10 <30 <1.0 <30 <75300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <10 <30 <1.0 <30 <75300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <30 <1.0 <30 <75

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <10 <30 <1.0 <30 <75300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <10 <30 <1.0 <30 <75300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <10 <30 <1.0 <30 <75300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <10 <30 <1.0 <30 <75300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <10 <30 <1.0 <30 <75300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <10 <30 <1.9 <30 E2.8

Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005. [All concentrations in micrograms per kilogram except where indicated. ID, identifier; cm, centimeters; E, estimated value; <, nondetection at indicated value; dup., duplicate; - -, not applicable]

Table 7

132 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number 1-Naphthol 2,6-Diethyl- aniline 2-Chloro- 2,6-diethyl- acetanilide 2-Ethyl-6- methyl- aniline 3,4-Di- chloro- aniline

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <10 <30 <1.0 <30 <75300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <10 <30 <1.8 <30 E6.3300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <10 <30 <1.0 <30 E1.3300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <10 <30 <1.4 <30 E8.2

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <10 <30 <1.0 <30 <75301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <10 <30 <1.0 <30 <75301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <10 <30 <1.0 <30 <75301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <10 <30 <1.0 <30 <75301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <10 <30 <1.0 <30 <75300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <10 <30 <1.1 <30 <75300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <10 <30 <1.0 <30 <75Quality-assurance samples

Blank - - 200527104 & 

200527115

<10 <30 <1.0 <30 <75

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E18.6 (0–150) E49.3 (0–150) 82.8 (60–140) E52.8 (0–150) E47.4 (0–150)

Blank - - 200529105 <10 <30 <1.0 <30 <75Spike, in percent recovered (acceptable range) - - 200529105 15.8 (0–150) 43.8 (0–150) 88.1 (60–140) 50.4 (0–150) 46.7 (0–150)Blank - - 200529804 <10 <30 <1.0 <30 <75Spike, in percent recovered (acceptable range) - - 200529804 12.4 (0–150) 39.8 (0–150) 80.3 (60–140) 45.4 (0–150) 37.9 (0–150)Blank - - 200531803 <10 <30 <1.0 <30 E.13Spike, in percent recovered (acceptable range) - - 200531803 13.5 (0–150) 60.0 (0–150) 91.8 (60–140) 58.8 (0–150) 50.8 (0–150)Blank - - 200533304 <10 <30 <1.0 <30 E.11Spike, in percent recovered (acceptable range) - - 200533304 10.7 (0–150) 42.0 (0–150) 83.4 (60–140) 40.1 (0–150) 24.0 (0–150)

Table 7  133
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number

4-Chloro2-methylphenol Acetochlor Alachlor Atrazine Azinphos- methyl

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <10 <1.0 <1.0 <1.0 <5.0300056090070301 FDL Street mud 10/03/2005 200529105 <10 <1.0 <1.0 <1.0 <5.0300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <10 <1.0 <1.0 <1.0 <5.0300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <10 <1.0 <22 <1.0 <5.0300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <10 <1.0 <23 <1.0 <5.0300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <10 <1.0 <1.0 <1.0 <5.0301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <10 <1.0 <1.0 <1.0 <5.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <10 <9.2 <1.0 <8.7 <5.0300110090040401 CD dup. Street mud 10/03/2005 200529105 <10 <9.0 <1.0 <8.9 <5.0300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <1.0 <1.0 <1.0 <5.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <10 <1.0 <1.0 <3.5 <5.0300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <10 <1.0 <1.0 <1.0 <5.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <10 <1.0 <1.0 <1.0 <5.0300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <1.0 <1.0 <1.0 <5.0300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <10 <1.0 <2.6 2.6 <5.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <1.0 <1.0 <1.0 <5.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <10 <1.0 <1.4 1.3 <5.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <10 <1.0 <1.0 <1.4 <5.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <10 <1.0 <1.0 <1.0 <5.0

134  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number 4-Chloro- 2-methyl- phenol Acetochlor Alachlor Atrazine Azinphos- methyl

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <10 <1.0 <1.0 E.24 <5.0300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <10 <1.0 <1.0 <1.0 <5.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <10 <1.0 <1.0 <1.0 <5.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <10 <1.0 <1.0 <1.0 <5.0301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <10 <1.0 <1.4 1.6 <5.0301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <10 <1.0 <1.0 <1.0 <5.0300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <10 <1.0 <1.0 <1.0 <5.0Quality-assurance samples

Blank - - 200527104 & 

200527115

<10 <1.0 <1.0 <1.0 <5.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E61.9 (0–150) 80.0 (50–140) 76.3 (50–140) 76.8 (55–140) E72.0 (0–250)

Blank - - 200529105 <10 <1.0 <1.0 <1.0 <5.0Spike, in percent recovered (acceptable range) - - 200529105 38.1 (0–150) 87.3 (50–140) 84.3 (50–140) 84.2 (55–140) 83.9 (0–250)Blank - - 200529804 <10 <1.0 <1.0 <1.0 <5.0Spike, in percent recovered (acceptable range) - - 200529804 28.0 (0–150) 80.6 (50–140) 77.8 (50–140) 81.0 (55–140) 67.5 (0–250)Blank - - 200531803 <10 <1.0 <1.0 <1.0 <5.0Spike, in percent recovered (acceptable range) - - 200531803 53.3 (0–150) 90.8 (50–140) 85.1 (50–140) 87.2 (55–140) 80.4 (0–250)Blank - - 200533304 <10 <1.0 <1.0 <1.0 <5.0Spike, in percent recovered (acceptable range) - - 200533304 52.2 (0–150) 81.0 (50–140) 77.1 (50–140) 78.8 (55–140) 95.8 (0–250)

Table 7  135
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Azinphos- methyloxon Benfluralin Carbaryl Chlorpyrifos Chlorpyrifos oxygen analog

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <30 <1.0 E2.8 6.0 <30300056090070301 FDL Street mud 10/03/2005 200529105 <30 <1.0 <2.0 4.9 <30300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <30 <1.0 <2.0 <1.0 <30

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <30 <1.0 <2.0 31 <30300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <30 <1.0 <2.0 32 <30300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <30 <1.0 <2.0 5.6 <30301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <30 <1.0 <2.0 E.56 <30

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <30 <1.0 <2.0 35 <30300110090040401 CD dup. Street mud 10/03/2005 200529105 <30 <1.0 <2.0 41 <30300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <30 <1.0 <2.0 E.81 <30

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <30 <1.0 <2.0 2.8 <30300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <30 <1.0 <2.0 E.35 <30

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <30 <1.0 <2.0 2.9 <30300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <30 <1.0 <2.0 <1.0 <30

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <30 <1.0 <2.0 E.41 <30

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <30 <1.0 E.97 <1.0 <30

300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <30 <1.0 <2.0 <1.0 <30

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <30 <1.0 <2.0 <1.0 <30

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <30 <1.0 <2.0 1.4 <30

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <30 <1.0 <2.0 <1.0 <30

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <30 <1.0 <2.0 <1.0 <30

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <30 <1.0 <2.0 <1.0 <30

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <30 <1.0 <2.0 <1.0 <30

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <30 <1.0 <2.0 <1.0 <30

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <30 <1.0 <2.0 2.2 <30

136  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table . atrina and Rita, 2005—Continued. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes K

Sample ID and Azinphos- Chlorpyrifos Sample USGS station ID interval (cm), Sample type Set number methyl- Benfluralin Carbaryl Chlorpyrifos oxygen date where shown oxon analog

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <30 <1.0 <2.0 E.18 <30300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <30 <1.0 <2.0 E.50 <30300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <30 <1.0 <2.0 <1.0 <30300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <30 <1.0 <2.0 <1.0 <30

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <30 <1.0 <2.0 <1.0 <30301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <30 <1.0 <2.0 <1.0 <30301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <30 <1.0 <2.0 <1.0 <30301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <30 <1.0 <2.0 <1.0 <30301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <30 <1.0 <2.0 <1.0 <30300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <30 <1.0 <2.0 E.82 <30300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <30 <1.0 <2.0 <1.0 <30Quality-assurance samples

Blank - - 200527104 & <30 <1.0 <2.0 <1.0 <30

200527115

Spik ered (acceptable range) e, in percent recov - - 200527104 & E110.0 (0–150) 52.4 (15–150) E55.9 (0–350) 72.1 (50–140) E77.8 (0–150)

200527115

Blank - - 200529105 <30 <1.0 <2.0 <1.0 <30Spik ered (acceptable range) e, in percent recov - - 200529105 101.7 (0–150) 73.8 (15–150) 69.6 (0–350) 81.4 (50–140) 89.8 (0–150)Blank - - 200529804 <30 <1.0 <2.0 <1.0 <30Spik ered (acceptable range) e, in percent recov - - 200529804 85.0 (0–150) 75.7 (15–150) 60.0 (0–350) 74.9 (50–140) 75.3 (0–150)Blank - - 200531803 <30 <1.0 <2.0 <1.0 <30Spik ered (acceptable range) e, in percent recov - - 200531803 121.9 (0–150) 80.4 (15–150) 85.4 (0–350) 91.0 (50–140) 97.3 (0–150)Blank - - 200533304 <30 <1.0 <2.0 <1.0 <30

e, in percent recovered (acceptable range) Spik - - 200533304 92.0 (0–150) 59.5 (15–150) 58.9 (0–350) 63.1 (50–140) 72.2 (0–150)

Table 7  137
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Cyfluthrin Cypermethrin Dacthal

2-Chloro-4-isopropylamino-6-amino-striazine (CIAT)

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <20 <20 <1.0 <3.7300056090070301 FDL Street mud 10/03/2005 200529105 <20 <20 <1.0 <2.0

300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <20 <20 <1.0 <2.0

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <20 <20 <1.0 <13

300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <20 <20 <1.0 <14

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <20 <20 <1.0 <7.1

301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <20 <20 <1.0 <2.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <20 <20 <1.0 <3.8

300110090040401 CD dup. Street mud 10/03/2005 200529105 <20 <20 <1.0 <4.2

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <20 <20 <1.0 <2.0

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <20 <20 <1.0 <3.1

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <20 <20 <1.0 <2.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <20 <20 <1.0 <2.0

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <20 <20 <1.0 <2.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <20 <20 <1.0 <2.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <20 <20 <1.0 <2.0

300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <20 <20 <1.0 <2.0

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <20 <20 <1.0 <2.0

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <20 <20 <1.0 <2.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <20 <20 <1.0 <2.0

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <20 <20 <1.0 <2.0

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <20 <20 <1.0 <2.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <20 <20 <1.0 <2.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <20 <20 <1.0 <2.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <20 <20 <1.0 <3.7

138  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Cyfluthrin Cypermethrin Dacthal

2-Chloro-4-isopropylamino-6-amino-striazine (CIAT)

Other bed sediment samples­—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <20 <20 E.07 <2.0300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <20 <20 <1.0 <2.0

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <20 <20 <1.0 <2.0

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <20 <20 <1.0 <2.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <20 <20 <1.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <20 <20 <1.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <20 <20 <1.0 <2.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <20 <20 <1.0 <2.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <20 <20 <1.0 <2.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <20 <20 <1.0 <2.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <20 <20 <1.0 <2.0

Quality-assurance samples

Blank - - 200527104 & 

200527115

<20 <20 <1.0 <2.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E78.7 (15–160) E93.6 (15–160) 73.7 (50–140) E99.3 (50–160)

Blank - - 200529105 <20 <20 <1.0 <2.0

Spike, in percent recovered (acceptable range) - - 200529105 79.5 (15–160) 89.6 (15–160) 84.3 (50–140) 91.5 (50–160)Blank - - 200529804 <20 <20 <1.0 <2.0

Spike, in percent recovered (acceptable range) - - 200529804 71.2 (15–160) 81.5 (15–160) 79.2 (50–140) 75.6 (50–160)Blank - - 200531803 <20 <20 <1.0 <2.0

Spike, in percent recovered (acceptable range) - - 200531803 74.3 (15–160) 89.6 (15–160) 93.4 (50–140) 93.1 (50–160)Blank - - 200533304 <20 <20 <1.0 <2.0

Spike, in percent recovered (acceptable range) - - 200533304 59.2 (15–160) 74.2 (15–160) 78.9 (50–140) 80.7 (50–160)

Table 7  139
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Diazinon Diazoxon Dichlorvos Dicrotophos Dieldrin

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <1.0 <5.0 <30 <3.0 8.7

300056090070301 FDL Street mud 10/03/2005 200529105 <1.0 <5.0 <30 <3.0 54

300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <1.0 <5.0 <30 <3.0 <2.0

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <2.1 <5.0 <30 <3.0 <41

300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <2.0 <5.0 <30 <3.0 <24

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <5.3 <5.0 <30 <3.0 <5.7

301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <1.0 <5.0 <30 <3.0 E1.6

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <2.0 <5.0 <30 <3.0 41

300110090040401 CD dup. Street mud 10/03/2005 200529105 <2.0 <5.0 <30 <3.0 45

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 <5.0 <30 <3.0 <2.0

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <1.0 <5.0 <30 <3.0 <2.0

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <1.0 <5.0 <30 <3.0 <2.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <2.2 <5.0 <30 <3.0 <2.0

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 <5.0 <30 <3.0 <2.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <1.0 <5.0 <30 <3.0 <2.0

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 <5.0 <30 <3.0 <2.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <1.0 <5.0 <30 <3.0 <2.0

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <1.0 <5.0 <30 <3.0 <2.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <1.0 <5.0 <30 <3.0 3.5

140 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Diazinon Diazoxon Dichlorvos Dicrotophos Dieldrin

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <1.0 <5.0 <30 <3.0 <2.0

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <1.0 <5.0 <30 <3.0 <2.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <1.0 <5.0 <30 <3.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <1.0 <5.0 <30 <3.0 2.6

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <1.0 <5.0 <30 <3.0 <2.0

Quality-assurance samples

Blank - - 200527104 & 

200527115

<1.0 <5.0 <30 <3.0 <2.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

67.4 (40–140) E85.1 (0–150) E68.4 (0–150) E106.5 (0–150) E84.2 (40–165)

Blank - - 200529105 <1.0 <5.0 <30 <3.0 <2.0

Spike, in percent recovered (acceptable range) - - 200529105 82.9 (40–140) 84.8 (0–150) 63.1 (0–150) 100.8 (0–150) 105.7 (40–165)Blank - - 200529804 <1.0 <5.0 <30 <3.0 <2.0

Spike, in percent recovered (acceptable range) - - 200529804 74.4 (40–140) 74.4 (0–150) 50.0 (0–150) 81.9 (0–150) 73.2 (40–165)Blank - - 200531803 <1.0 <5.0 <30 <3.0 <2.0

Spike, in percent recovered (acceptable range) - - 200531803 87.7 (40–140) 94.7 (0–150) 62.0 (0–150) 93.2 (0–150) 78.3 (40–165)Blank - - 200533304 <1.0 <5.0 <30 <3.0 <2.0

Spike, in percent recovered (acceptable range) - - 200533304 79.4 (40–140) 83.1 (0–150) 42.7 (0–150) 87.2 (0–150) 78.9 (40–165)

Table 7  141
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Dimethoate Ethion Ethion monoxon Fenamiphos Fenamiphos sulfone

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <2.0 <2.0 <2.0 <30 <10

300056090070301 FDL Street mud 10/03/2005 200529105 <2.0 <53 <2.0 <30 <10300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <2.0 <2.0 <2.0 <30 <10300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <2.0 <2.0 <2.0 <30 <10300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <2.0 <2.0 <2.0 <30 <10300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <2.0 <27 <2.0 <30 <10301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <2.0 <2.0 <2.0 <30 <10

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <2.0 <2.0 <2.0 <30 <10300110090040401 CD dup. Street mud 10/03/2005 200529105 <2.0 <2.0 <2.0 <30 <10300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <2.0 <2.0 <30 <10300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <2.0 <5.6 <2.0 <30 <10300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <2.0 <2.0 <2.0 <30 <10

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <2.0 <17 <2.0 <30 <10300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <2.0 <2.0 <30 <10300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <2.0 <2.0 <2.0 <30 <10300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <2.0 <2.0 <2.0 <30 <10300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <2.0 <2.0 <2.0 <30 <10300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <2.0 <2.3 <2.0 <30 <10

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <2.0 <2.0 <30 <10

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <2.0 <2.0 <2.0 <30 <10

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <2.0 <2.0 <2.0 <30 <10

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <2.0 <2.0 <2.0 <30 <10

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <2.0 <2.0 <2.0 <30 <10

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <2.0 <2.0 <30 <10

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <2.0 <2.0 <30 <10

142 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID Sample ID and interval (cm), where shown Sample type Sample date Set number Dimethoate Ethion Ethion monoxon Fenamiphos Fenamiphos sulfone

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <2.0 <2.0 <2.0 <30 <10

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <2.0 <2.0 <2.0 <30 <10300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <2.0 <2.0 <2.0 <30 <10300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <2.0 <2.9 <2.0 <30 <10

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <2.0 <2.0 <2.0 <30 <10301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <2.0 <2.0 <2.0 <30 <10301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <2.0 <2.0 <2.0 <30 <10301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <2.0 <2.0 <2.0 <30 <10301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <2.0 <2.0 <2.0 <30 <10300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <2.0 <2.0 <2.0 <30 <10300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <2.0 <2.0 <2.0 <30 <10

Quality-assurance samples

Blank - - 200527104 & 

200527115

<2.0 <2.0 <2.0 <30 <10

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E88.3 (50–150) E88.4 (40–150) E95.1 (35–180) 0.0 (0–300) E103.3 (35–215)

Blank - - 200529105 <2.0 <2.0 <2.0 <30 <10

Spike, in percent recovered (acceptable range) - - 200529105 85.9 (50–150) 99.0 (40–150) 107.6 (35–180) 8.6 (0–300) 108.5 (35–215)

Blank - - 200529804 <2.0 <2.0 <2.0 <30 <10

Spike, in percent recovered (acceptable range) - - 200529804 81.3 (50–150) 76.8 (40–150) 80.3 (35–180) 16.6 (0–300) 89.0 (35–215)

Blank - - 200531803 <2.0 <2.0 <2.0 <30 <10

Spike, in percent recovered (acceptable range) - - 200531803 89.0 (50–150) 82.6 (40–150) 87.2 (35–180) 71.4 (0–300) 102.5 (35–215)

Blank - - 200533304 <2.0 <2.0 <2.0 <30 <10

Spike, in percent recovered (acceptable range) - - 200533304 83.5 (50–150) 78.0 (40–150) 88.2 (35–180) 74.0 (0–300) 72.8 (35–215)

Table 7  143
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Fenamiphos sulfoxide

Fenamiphos 

+fenamiphos 

sulfoxide 

+fenamiphos 

sulfone

Fipronil Fipronil sulfide

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <10 <50 E7.2 8.1300056090070301 FDL Street mud 10/03/2005 200529105 <10 <50 E9.1 11300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <10 <50 <1.0 <1.0

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <10 <50 E7.5 19

300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <10 <50 E7.9 20300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <10 <50 E4.0 5.2301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <10 <50 <1.0 E.55

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <10 <50 E11 17

300110090040401 CD dup. Street mud 10/03/2005 200529105 <10 <50 E10 18300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <50 <1.0 E.36

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <10 <50 <1.0 E.60300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <10 <50 <1.0 E.18

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <10 <50 E1.8 2.3

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <50 <1.0 <1.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <10 <50 <1.0 E.10300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <10 <50 <1.0 E.07300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <10 <50 <1.0 E.09300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <10 <50 E1.8 1.5

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <50 <1.0 <1.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <10 <50 <1.0 <1.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <10 <50 <1.0 E.06300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <10 <50 <1.0 <1.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <10 <50 <1.0 <1.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <10 <50 <1.0 <1.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <10 <50 <1.0 1.4

144  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Fenamiphos sulfoxide

Fenamiphos 

+fenamiphos 

sulfoxide 

+fenamiphos 

sulfone

Fipronil Fipronil sulfide

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <10 <50 <1.0 E.10

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <10 <50 <1.0 E.08300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <10 <50 <1.0 E0.06300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <10 <50 <1.0 <1.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <10 <50 <1.0 E.05301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <10 <50 <1.0 <1.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <10 <50 <1.0 <1.0301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <10 <50 <1.0 <1.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <10 <50 <1.0 <1.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <10 <50 E.09 E.82300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <10 <50 <1.0 <1.0

Quality-assurance samples

Blank - - 200527104 & 

200527115

<10 <50 <1.0 <1.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E270.8 (45–350) 374.1 (80–865) E87.2 (40–200) 154.6 (50–150)

Blank - - 200529105 <10 <50 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200529105 226.5 (45–350) 343.5 (80–865) 90.4 (40–200) 106.1 (50–150)Blank - - 200529804 <10 <50 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200529804 216.5 (45–350) 322.1 (80–865) 86.6 (40–200) 92.1 (50–150)Blank - - 200531803 <10 <50 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200531803 108.1 (45–350) 282.0 (80–865) 101.5 (40–200) 106.2 (50–150)Blank - - 200533304 <10 <50 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200533304 103.6 (45–350) 250.4 (80–865) 86.8 (40–200) 88.2 (50–150)

Table 7  145
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Fipronil sulfone Desulfinyl- fipronil Desulfinyl- fipronil amide Fonofos Hexazinone

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 4.6 2.1 <1.0 <1.0 <1.0300056090070301 FDL Street mud 10/03/2005 200529105 8.3 1.3 <1.0 <1.0 <1.0300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 E1.5 E.41 <1.0 <1.0 <1.0300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 20 4.5 <1.0 <1.0 <1.0300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 22 4.7 E3.1 <1.0 <1.0300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 15 3.2 <1.0 <1.0 <1.0301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 1.0 E.29 <1.0 <1.0 <1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 7.3 2.4 <1.0 <35 <1.0300110090040401 CD dup. Street mud 10/03/2005 200529105 7.3 2.5 <1.0 <32 <1.0300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 <1.0 <1.0 <1.0 <1.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 8.2 2.8 <1.0 <1.0 <1.0300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 E.84 E.29 <1.0 <1.0 <1.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 5.1 2.6 <1.0 <1.0 <1.0300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 <1.0 <1.0 <1.0 <1.0300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 E.67 E.21 <1.0 <1.0 <1.0300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <1.0 E.28 <1.0 <1.0 <1.0300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <1.0 E.26 <1.0 <1.0 <1.0300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 3.7 1.7 <1.0 <1.0 <1.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 <1.0 <1.0 <1.0 <1.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <1.0 E.69 <1.0 <1.0 <1.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <1.0 E.20 <1.0 <1.0 <1.0300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <1.0 <1.0 <1.0 <1.0 <1.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <1.0 <1.0 <1.0 <1.0 <1.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <1.0 <1.0 <1.0 <1.0 <1.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <1.0 2.2 <1.0 <1.0 <1.0

146  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Fipronil sulfone Desulfinyl- fipronil Desulfinyl- fipronil amide Fonofos Hexazinone

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 E.50 E.18 <1.0 <1.0 <1.0300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <1.0 E.29 <1.0 <1.0 <1.0300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 E0.71 E0.25 <1.0 <1.0 <1.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <1.0 <1.0 <1.0 <1.0 <1.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <1.0 <1.0 <1.0 <1.0 <1.0301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <1.0 <1.0 <1.0 <1.0 <1.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <1.0 <1.0 <1.0 <1.0 <1.0301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <1.0 <1.0 <1.0 <1.0 <1.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <1.0 <1.0 <1.0 <1.0 <1.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 1.4 E.43 <1.0 <1.0 <1.0300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <1.0 <1.0 <1.0 <1.0 <1.0Quality-assurance samples

Blank - - 200527104 & 

200527115

<1.0 <1.0 <1.0 <1.0 <1.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

148.3 (45–160) 133.4 (50–155) E190.0 (55–250) 56.1 (25–140) 85.9 (45–145)

Blank - - 200529105 <1.0 <1.0 <1.0 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200529105 102.5 (45–160) 82.0 (50–155) 108.3 (55–250) 63.2 (25–140) 98.7 (45–145)Blank - - 200529804 <1.0 <1.0 <1.0 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200529804 88.3 (45–160) 81.5 (50–155) 77.9 (55–250) 63.9 (25–140) 80.2 (45–145)Blank - - 200531803 <1.0 <1.0 <1.0 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200531803 86.7 (45–160) 87.5 (50–155) 79.5 (55–250) 83.6 (25–140) 95.6 (45–145)Blank - - 200533304 <1.0 <1.0 <1.0 <1.0 <1.0Spike, in percent recovered (acceptable range) - - 200533304 82.4 (45–160) 78.6 (50–155) 86.0 (55–250) 72.4 (25–140) 100.6 (45–145)

Table 7  147
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Iprodione Isofenphos Malaoxon Malathion Metalaxyl

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <10 <2.0 <5.0 <2.0 <1.0300056090070301 FDL Street mud 10/03/2005 200529105 <10 <2.0 <5.0 <2.0 <1.0300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <10 <2.0 <5.0 <2.0 <1.0300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <10 <2.0 <5.0 <34 <1.0300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <21 <2.0 <5.0 <2.0 <1.0301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <10 <25 <5.0 <13 <1.0300110090040401 CD dup. Street mud 10/03/2005 200529105 <10 <23 <5.0 <20 <1.0300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <2.0 <5.0 <2.0 <1.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <10 <2.0 <5.0 <2.0 <1.0300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <2.0 <5.0 <2.0 <1.0300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <10 <2.0 <5.0 <2.0 <1.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <10 <2.0 <5.0 <2.0 <1.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <10 <2.0 <5.0 <2.0 <1.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <13 <2.0 <5.0 <2.0 <1.0

148  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Iprodione Isofenphos Malaoxon Malathion Metalaxyl

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <11 <2.0 <5.0 <2.0 <1.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <10 <2.0 <5.0 <2.0 <1.0300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <10 <2.0 <5.0 <2.0 <1.0Quality-assurance samples

Blank - - 200527104 & 

200527115

<10 <2.0 <5.0 <2.0 <1.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E14.9 (0–275) E77.9 (35–140) E53.0 (0–150) E62.4 (30–150) 81.1 (40–150)

Blank - - 200529105 <10 <2.0 <5.0 <2.0 <1.0Spike, in percent recovered (acceptable range) - - 200529105 25.4 (0–275) 78.9 (35–140) 69.2 (0–150) 75.8 (30–150) 88.6 (40–150)Blank - - 200529804 <10 <2.0 <5.0 <2.0 <1.0Spike, in percent recovered (acceptable range) - - 200529804 37.1 (0–275) 80.9 (35–140) 54.4 (0–150) 71.1 (30–150) 90.8 (40–150)Blank - - 200531803 <10 <2.0 <5.0 <2.0 <1.0Spike, in percent recovered (acceptable range) - - 200531803 15.0 (0–275) 98.4 (35–140) 72.0 (0–150) 81.9 (30–150) 93.3 (40–150)Blank - - 200533304 <10 <2.0 <5.0 <2.0 <1.0Spike, in percent recovered (acceptable range) - - 200533304 9.2 (0–275) 88.1 (35–140) 55.4 (0–150) 71.0 (30–150) 80.5 (40–150)

Table 7  149
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Methidathion Metolachlor Metribuzin Myclobutanil Paraoxon- methyl

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <2.0 <2.6 <4.0 <1.0 <5.0

300056090070301 FDL Street mud 10/03/2005 200529105 <2.0 <1.0 <4.0 <1.0 <5.0

300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <2.0 <1.0 <4.0 <1.0 <5.0

300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <2.0 <12 <4.0 <1.0 <5.0

300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <2.0 <1.0 <4.0 <1.0 <5.0

301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <2.0 <5.0 <4.0 <1.0 <5.0

300110090040401 CD dup. Street mud 10/03/2005 200529105 <32 <5.0 <4.0 <1.0 <5.0

300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <1.0 <4.0 <1.0 <5.0

300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <2.0 <1.0 <4.0 <1.0 <5.0

300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <1.0 <4.0 <1.0 <5.0

300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <2.0 <2.0 <4.0 <1.0 <5.0

300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <1.0 <4.0 <1.0 <5.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <1.0 <4.0 <1.0 <5.0

300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <4.1 <4.0 <1.0 <5.0

150 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Methidathion Metolachlor Metribuzin Myclobutanil Paraoxon- methyl

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <2.0 <1.8 <4.0 <1.0 <5.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

Quality-assurance samples

Blank - - 200527104 & 

200527115

<2.0 <1.0 <4.0 <1.0 <5.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E90.5 (40–175) 84.4 (60–140) E76.3 (5–145) E97.0 (50–225) E80.8 (0–250)

Blank - - 200529105 <2.0 <1.0 <4.0 <1.0 <5.0

Spike, in percent recovered (acceptable range) - - 200529105 102.4 (40–175) 89.9 (60–140) 81.0 (5–145) 102.0 (50–225) 78.3 (0–250)Blank - - 200529804 <2.0 <1.0 <4.0 <1.0 <5.0

Spike, in percent recovered (acceptable range) - - 200529804 81.5 (40–175) 87.0 (60–140) 74.3 (5–145) 83.7 (50–225) 68.8 (0–250)Blank - - 200531803 <2.0 <1.0 <4.0 <1.0 <5.0

Spike, in percent recovered (acceptable range) - - 200531803 81.9 (40–175) 97.5 (60–140) 87.0 (5–145) 82.3 (50–225) 98.5 (0–250)Blank - - 200533304 <2.0 <1.0 <4.0 <1.0 <5.0

Spike, in percent recovered (acceptable range) - - 200533304 78.4 (40–175) 86.9 (60–140) 71.0 (5–145) 86.6 (50–225) 69.3 (0–250)

Table 7  151
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Parathion- methyl Pendi- methalin Phorate Phorate oxon Prometon

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <2.0 <1.0 <5.0 <7.0 <2.0300056090070301 FDL Street mud 10/03/2005 200529105 <2.0 <1.0 <5.0 <7.0 <2.0300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <2.0 <67 <5.0 <7.0 <2.0300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <2.0 <63 <5.0 <7.0 <2.0300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <2.0 <7.1 <5.0 <7.0 <2.0301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <2.0 <25 <5.0 <7.0 <2.0300110090040401 CD dup. Street mud 10/03/2005 200529105 <2.0 <28 <5.0 <7.0 <2.0300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <1.0 <5.0 <7.0 <2.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <2.0 <11 <5.0 <7.0 <2.0300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <1.0 <5.0 <7.0 <2.0300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <2.0 <1.0 <5.0 <7.0 <2.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <1.0 <5.0 <7.0 <2.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <1.0 <5.0 <7.0 <2.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <1.0 <5.0 <7.0 <2.0

152 Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Parathion- methyl Pendi- methalin Phorate Phorate oxon Prometon

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <2.0 <1.0 <5.0 <7.0 <2.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <2.0 <1.0 <5.0 <7.0 <2.0300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <2.0 <1.0 <5.0 <7.0 <2.0Quality-assurance samples

Blank - - 200527104 & 

200527115

<2.0 <1.0 <5.0 <7.0 <2.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E73.1 (40–200) 65.8 (30–160) E17.9 (0–150) .0 (0–175) E74.9 (15–200)

Blank - - 200529105 <2.0 <1.0 <5.0 <7.0 <2.0Spike, in percent recovered (acceptable range) - - 200529105 85.2 (40–200) 88.4 (30–160) .0 (0–150) .0 (0–175) 71.5 (15–200)Blank - - 200529804 <2.0 <1.0 <5.0 <7.0 <2.0Spike, in percent recovered (acceptable range) - - 200529804 74.8 (40–200) 82.4 (30–160) .0 (0–150) .0 (0–175) 68.1 (15–200)Blank - - 200531803 <2.0 <1.0 <5.0 <7.0 <2.0Spike, in percent recovered (acceptable range) - - 200531803 88.5 (40–200) 98.9 (30–160) 73.9 (0–150) 78.3 (0–175) 75.4 (15–200)Blank - - 200533304 <2.0 <1.0 <5.0 <7.0 <2.0Spike, in percent recovered (acceptable range) - - 200533304 66.7 (40–200) 63.3 (30–160) 56.6 (0–150) 69.7 (0–175) 70.4 (15–200)

Table 7  153
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Prometryn cis- Permethrin trans- Permethrin Propyzamide Simazine

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <2.0 <5.0 <5.0 <2.0 <3.0

300056090070301 FDL Street mud 10/03/2005 200529105 <2.0 <22 <34 <2.0 <4.3300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <2.0 <5.0 <5.0 <2.0 <2.0300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <2.0 <59 <78 <2.0 <14300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <2.0 <67 <83 <2.0 <17300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <2.0 <21 <25 <2.0 <5.5301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <2.0 <5.0 <5.0 <2.0 <2.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <13 <47 <120 <2.0 <20300110090040401 CD dup. Street mud 10/03/2005 200529105 <18 <48 <113 <2.0 <18300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <5.0 <5.0 <2.0 <2.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <2.0 <5.0 <5.0 <2.0 <3.1300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <2.0 <5.0 <5.0 <2.0 <2.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <2.0 <5.0 <5.0 <2.0 <2.0300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <5.0 <5.0 <2.0 <2.0300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <2.0 <5.0 <5.0 <2.0 <2.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <2.0 <5.0 <5.0 <2.0 <2.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <2.0 <5.0 <5.0 <2.0 <2.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <5.0 <5.0 <2.0 <2.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <2.0 <5.0 <5.0 <2.0 <2.0

154  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued.

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Prometryn cis- Permethrin trans- Permethrin Propyzamide Simazine

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <2.0 <5.0 <5.0 <2.0 <3.0300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <2.0 <5.0 <5.0 <2.0 <2.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <2.0 <5.0 <5.0 <2.0 <2.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <2.0 <5.0 <5.0 <2.0 <2.0301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <2.0 <5.0 <7.9 <2.0 <2.0300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <2.0 <5.0 <5.0 <2.0 <2.0

Quality-assurance samples

Blank - - 200527104 & 

200527115

<2.0 <5.0 <5.0 <2.0 <2.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E73.8 (30–140) E105.3 (40–160) E80.9 (40–160) E69.0 (40–150) E85.9 (40–160)

Blank - - 200529105 <2.0 <5.0 <5.0 <2.0 <2.0

Spike, in percent recovered (acceptable range) - - 200529105 73.3 (30–140) 98.5 (40–160) 90.1 (40–160) 82.7 (40–150) 90.3 (40–160)

Blank - - 200529804 <2.0 <5.0 <5.0 <2.0 <2.0

Spike, in percent recovered (acceptable range) - - 200529804 71.9 (30–140) 87.3 (40–160) 84.9 (40–160) 80.3 (40–150) 87.4 (40–160)

Blank - - 200531803 <2.0 <5.0 <5.0 <2.0 <2.0

Spike, in percent recovered (acceptable range) - - 200531803 85.1 (30–140) 89.9 (40–160) 90.4 (40–160) 94.1 (40–150) 95.9 (40–160)

Blank - - 200533304 <2.0 <5.0 <5.0 <2.0 <2.0

Spike, in percent recovered (acceptable range) - - 200533304 78.6 (30–140) 88.4 (40–160) 78.2 (40–160) 73.0 (40–150) 82.5 (40–160)

Table 7  155
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Tebuthiuron Terbufos Terbufos-O- analogue sulfone Terbuthyl- azine

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <3.0 <3.0 <5.0 <1.0

300056090070301 FDL Street mud 10/03/2005 200529105 <3.0 <3.0 <5.0 <1.0300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <3.0 <3.0 <5.0 <1.0300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 <3.0 <3.0 <5.0 <1.0300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 <3.0 <3.0 <5.0 <1.0300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <3.0 <3.0 <5.0 <1.0301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <3.0 <3.0 <5.0 <1.0

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <3.0 <3.0 <5.0 <17300110090040401 CD dup. Street mud 10/03/2005 200529105 <3.0 <3.0 <5.0 <17300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <3.0 <3.0 <5.0 <1.0300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <3.0 <3.0 <5.0 <1.0300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <3.0 <3.0 <5.0 <1.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <3.0 <3.0 <31 <1.0300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <3.0 <3.0 <5.0 <1.0300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <3.0 <3.0 <5.0 <1.0300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <3.0 <3.0 <5.0 <1.0300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <3.0 <3.0 <5.0 <1.0300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <3.0 <3.0 <5.0 <1.0300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <3.0 <3.0 <5.0 <1.0

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <3.0 <3.0 <5.0 <1.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <3.0 <3.0 <5.0 <1.0300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <3.0 <3.0 <5.0 <1.0300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <3.0 <3.0 <5.0 <1.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <3.0 <3.0 <5.0 <1.0300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <3.0 <3.0 <5.0 <1.0

156  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Tebuthiuron Terbufos Terbufos-O- analogue sulfone Terbuthyl- azine

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 <3.0 <3.0 <5.0 <1.0

300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <3.0 <3.0 <5.0 <1.0300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <3.0 <3.0 <5.0 <1.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <3.0 <3.0 <5.0 <1.0

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <3.0 <3.0 <5.0 <2.0301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <3.0 <3.0 <5.0 <1.0301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <3.0 <3.0 <5.0 <1.2301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <3.0 <3.0 <5.0 <1.0301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <3.0 <3.0 <5.0 <1.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <3.0 <3.0 <5.0 <1.0300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <3.0 <3.0 <5.0 <1.0

Quality-assurance samples

Blank - - 200527104 & 

200527115

<3.0 <3.0 <5.0 <1.0

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E78.1 (30–260) .0 (0–150) E94.3 (0–150) 76.5 (55–145)

Blank - - 200529105 <3.0 <3.0 <5.0 <1.0Spike, in percent recovered (acceptable range) - - 200529105 87.8 (30–260) .0 (0–150) 89.6 (0–150) 82.6 (55–145)Blank - - 200529804 <3.0 <3.0 <5.0 <1.0Spike, in percent recovered (acceptable range) - - 200529804 33.2 (30–260) .0 (0–150) 70.4 (0–150) 80.8 (55–145)Blank - - 200531803 <3.0 <3.0 <5.0 E.244Spike, in percent recovered (acceptable range) - - 200531803 86.8 (30–260) 73.9 (0–150) 118.8 (0–150) 102.0 (55–145)Blank - - 200533304 <3.0 <3.0 <5.0 E.192Spike, in percent recovered (acceptable range) - - 200533304 36.1 (30–260) 65.2 (0–150) 80.8 (0–150) 84.8 (55–145)

Table 7  157
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Trifluralin Sample mass (grams) Surrogates, percent recovery (acceptable range) alpha-HCH-d6 (28-121) Diazinon-d10 (37-142)

Zone E—17th Street Canal

300113090064901 NO1 Street mud 9/21/2005 200527104 <1.0 13.1 92.5 128300056090070301 FDL Street mud 10/03/2005 200529105 <1.0 21.9 95.8 161300125090074400 MET Bed sediment (dredge) 9/29/2005 200531803 <1.0 53.2 118 163300136090072001 E2 0–2 Bed sediment (box core) 9/21/2005 200527115 6.3 13.4 102 154300136090072001 E2 0–2 dup. Bed sediment (box core) 9/21/2005 200527115 5.8 12.6 108 166300144090072001 E3 0–2 Bed sediment (box core) 9/21/2005 200527104 <1.0 8.2 98.0 149301414090083900 BON Bed sediment (dredge) 9/29/2005 200531803 <1.0 57.6 95.5 126

Zone G—London Avenue Canal

300110090040401 CD Street mud 10/03/2005 200529105 <1.0 13.6 148 166300110090040401 CD dup. Street mud 10/03/2005 200529105 <1.0 13.2 132 163300159090043001 G2 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 31.9 104 143300205090043401 G3 0–1 Bed sediment (box core) 10/10/2005 200531803 <1.0 5.8 103 136300142090045800 STJ Bed sediment (dredge) 9/26/2005 200531803 <1.0 63.2 78.9 68.0

Zone J—Jahncke Canal

300355089571801 ONE Street mud 10/04/2005 200529105 <1.0 13.2 103 161300337089580701 J2 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 27.0 91.4 123300344089581000 JNK Bed sediment (dredge) 9/27/2005 200533304 <1.0 62.3 87.7 105300344089581000 JNK Bed sediment (dredge) 10/01/2005 200533304 <1.0 55.6 78.0 88.8300344089581000 JNK dup. Bed sediment (dredge) 10/01/2005 200533304 <1.0 51.3 66.1 73.4300418089583801 J4 0–1 Bed sediment (box core) 10/10/2005 200529804 <1.0 10.6 76.4 90.9300313089591401 J5 0–1 Bed sediment (box core) 10/10/2005 200529105 <1.0 17.6 90.9 133

Other bed sediment samples

300018089562300 ITC Bed sediment (dredge) 9/29/2005 200531803 <1.0 22.9 74.5 76.0300018089562300 ITC Bed sediment (dredge) 10/05/2005 200533304 <1.0 67.1 81.2 122300018089562300 ITC Bed sediment (dredge) 10/20/2005 200533304 <1.0 22.8 59.8 43.8300054090014600 NAV Bed sediment (dredge) 10/05/2005 200533304 <1.0 79.0 34.1 36.0300125090130801 C2 0–2 Bed sediment (box core) 10/09/2005 200529105 <1.0 19.8 43.8 44.8300202090125901 C1 0–2 Bed sediment (box core) 10/09/2005 200529105 <1.0 11.2 100 146

158  Chemical Constituents, Lake Pontchartrain, New Orleans, Louisiana, Following Hurricanes Katrina and Rita, 2005
Table 7. Current-use pesticide concentrations in sediment samples from Lake Pontchartrain and New Orleans following Hurricanes Katrina and Rita, 2005—Continued. 

USGS station ID

Sample ID and 

interval (cm), 

where shown

Sample type Sample date Set number Trifluralin Sample mass (grams) Surrogates, percent recovery (acceptable range) alpha-HCH-d6 (28-121) Diazinon-d10 (37-142)

Other bed sediment samples—Continued

300214090130300 ELM dup. Bed sediment (dredge) 9/30/2005 200533304 E.02 89.2 92.2 110300214090130300 ELM Bed sediment (dredge) 9/26/2005 200533304 <1.0 44.6 97.9 116300214090130300 ELM Bed sediment (dredge) 9/30/2005 200531803 <1.0 67.2 67.8 46.0300303090152601 A1 0–1 Bed sediment (box core) 10/09/2005 200529105 <1.0 17.5 100 150

Mid-lake reference site samples

301151090075700 MID Bed sediment (dredge) 9/28/2005 200531803 <1.0 21.2 59.5 33.7301151090075700 MID Bed sediment (dredge) 10/04/2005 200533304 <1.0 30.3 63.2 52.5301151090075700 MID Bed sediment (dredge) 10/20/2005 200533304 <1.0 13.3 85.3 84.9301001089442600 RGO Bed sediment (dredge) 9/28/2005 200533304 <1.0 72.2 79.0 91.9301001089442600 RGO Bed sediment (dredge) 10/21/2005 200533304 <1.0 63.4 78.4 99.0300403089481300 MNT Bed sediment (dredge) 9/28/2005 200531803 <1.0 48.8 122 165300403089481300 MNT Bed sediment (dredge) 10/21/2005 200533304 <1.0 59.1 75.1 87.2Quality-assurance samples

Blank - - 200527104 & 

200527115

<1.0 - - 71.9 74.1

Spike, in percent recovered (acceptable range) - - 200527104 & 

200527115

E42.8 (15–150) - - 66.8 71.1

Blank - - 200529105 <1.0 - - 76.6 83.7Spike, in percent recovered (acceptable range) - - 200529105 77.5 (15–150) - - 54.3 81.5Blank - - 200529804 <1.0 - - 62.6 72.9Spike, in percent recovered (acceptable range) - - 200529804 51.5 (15–150) - - 69.2 74.2Blank - - 200531803 <1.0 - - 73.5 84.1Spike, in percent recovered (acceptable range) - - 200531803 70.5 (15–150) - - 80.2 92.9Blank - - 200533304 <1.0 - - 70.3 87.4Spike, in percent recovered (acceptable range) - - 200533304 50.2 (15–150) - - 68.4 80.0

Table 7  159
Information regarding water resources in Texas is available at 

http: //tx.usgs.gov/