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GROUNDWATER SAMPLING REPORT for Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands Harris County, Texas Job No. 17/0066 Prepared For: Harris County Pollution Control Services 101 S. Richey, Suite H Pasadena, Texas 77506 Prepared By: Langan Engineering and Environmental Services, Inc. 17220 Katy Freeway, Suite 125 Houston, TX 77094 Robert S. (Rory) Johnston, PE, BCEE Principal/Vice President September 15, 2017 Langan Project No. 510026201

GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

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Page 1: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

GROUNDWATER SAMPLING REPORT

for

Residential Drinking Water Well

Sampling (Phase II)

Channelview and Highlands

Harris County, Texas

Job No. 17/0066

Prepared For:

Harris County Pollution Control Services

101 S. Richey, Suite H

Pasadena, Texas 77506

Prepared By:

Langan Engineering and Environmental Services, Inc. 17220 Katy Freeway, Suite 125

Houston, TX 77094

Robert S. (Rory) Johnston, PE, BCEE

Principal/Vice President

September 15, 2017

Langan Project No. 510026201

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Groundwater Sampling Report

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Texas

Langan Project No. 510026201

September 15, 2017

Page i of i

TABLE OF CONTENTS

1.0 INTRODUCTION ....................................................................................................... 1 1.1 Site Background and Project Area .......................................................................... 1

2.0 PHYSICAL SETTING ................................................................................................. 2 2.1 Geology .................................................................................................................... 2

2.2 Hydrogeology ........................................................................................................... 2

3.0 SAMPLING AND ANALYSIS .................................................................................... 2 4.0 LABORATORY ANALYTICAL RESULTS .................................................................. 5

4.1 Sampling Results ..................................................................................................... 5

4.2 Data Verification and Usability ............................................................................... 5

5.0 CONCLUSIONS ........................................................................................................ 6

TABLES

Table 1 Summary of Drinking Water Analytical Results

FIGURES

Figure 1 Overall Area Location Map

Figure 2 Project Area 1 Location Map

Figure 3 Project Area 2 Location Map

APPENDICES

Appendix A Field Data Sheets and Well Photograph Logs

Appendix B Laboratory Analytical Reports

Appendix C EPA Level 4 Data Validation Report

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Groundwater Sampling Report

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Texas

Langan Project No. 510026201

September 15, 2017

Page 1 of 6

1.0 INTRODUCTION

Langan Engineering and Environmental Services, Inc. (Langan) has prepared this Groundwater

Sampling Report on behalf of the Harris County Pollution Control Services (HCPCS) for the

Phase II Residential Drinking Water Well Sampling at residences located in Highlands and

Channelview, Texas (the “sites”). An Overall Area Location Map is provided as Figure 1.

This report documents well sampling activities at 45 residential drinking water wells and one

background well to sample for the potential presence of dioxins and furans.

1.1 Site Background and Project Area

Area residents living in close proximity to the San Jacinto River have expressed concerns that

their residential drinking water wells may have been impacted by dioxins from the San Jacinto

River Pits Superfund Site. Previous investigations completed by others included the sampling of

101 residential drinking water wells in Highlands and Baytown. Water samples were analyzed

for volatile organic compounds; synthetic organic compounds including PCBs, pesticides, and

semi-volatile organic compounds; metals; coliforms; and dioxins and furans.

In general, chemicals of concern (COCs) were detected at concentrations below their

respective United States Environmental Protection Agency (USEPA) Maximum Contaminant

Levels (MCLs). For the dioxins and furans, a 2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD)

Toxicity Equivalent (TEQ) for was calculated for the above 101 water samples. The TEQ ranged

from 0.56 pg/L to 29.77 pg/L, which is below the MCL of 30 pg/L used for 2,3,7,8-TCDD.

This current project consisted of the sampling of 46 domestic water wells situated in

Channelview and Highlands, Texas, located along the east and west banks of the San Jacinto

River. Water wells were proposed for sampling in the two project areas, referred to as Project

Area No. 1 and Project Area No. 2, and are described below (Figure 1):

Project Area No. 1 is located along the west bank of the San Jacinto River in

Channelview, Texas. This area includes residential parcels beginning at the river bank

and extends west to approximately Bear Bayou. Figure 2 shows Project Area 1 in detail.

Project Area No. 2 is located in Highlands, Texas. This area is generally located west of

the Harris County WCID#1 District border in the vicinity of Clear Lake Drive and extends

west to the San Jacinto River. Also included in this project area were 12 individual

residences scattered north of the district within a five mile radius of the river. Figure 3

shows Project Area 2 and the surrounding area in detail.

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Groundwater Sampling Report

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Texas

Langan Project No. 510026201

September 15, 2017

Page 2 of 6

To assess background groundwater conditions, HCPCS selected a groundwater well at the

Sheldon Sports Complex for sampling. The Sheldon Sports Complex is located upstream of the

areas indicated for this project.

2.0 PHYSICAL SETTING

2.1 Geology

According to the Geology of Texas Map (Bureau of Economic Geology, The University of Texas

at Austin, 1992), soils underlying the sites are mapped as part of the Beaumont Formation.

These soils are characterized as mostly clay, silt and sands; includes mostly stream channel,

point bar, natural levee, back swamps, and to a lesser extent coastal marsh and mud-flat

deposits.

The formation is part of a fluvial and marine coastal complex that is the result of multiple glacial

cycles dating back to Pleistocene/Holocene periods. The clays of the Beaumont formation are

generally over consolidated due to the desiccation from the changing sea/water table during the

above periods. The clays typically possess fissures and slickensides from the above wetting

and drying periods, and are highly plastic with a high volume change potential.

2.2 Hydrogeology

According to the Texas Water Development Board (TWDB), the sites are situated within the

Chicot Aquifer, and are generally located in the Buffalo Bayou-San Jacinto River Watershed

within the greater San Jacinto River Basin. Groundwater flow direction in the shallow aquifer is

presumed to follow topography and flow west (from Highlands) or east (from Channelview)

towards the San Jacinto River. Based on information available from well completion reports

maintained by both the TWDB and the Texas Commission on Environmental Quality (TCEQ),

drinking water wells on the sites are generally installed to depths ranging 200- to 300-feet

below grade, with water in the shallowest well being identified at approximately 150-feet below

grade.

3.0 SAMPLING AND ANALYSIS

Langan conducted groundwater sampling of 46 drinking water wells throughout the project

areas between June 12 and June 16, 2017. Prior to mobilizing to the sites, Langan pre-arranged

scheduled sampling times with each resident via telephone and confirmed whether someone

would be available to provide access to the well. In select cases, the residents informed

Langan that they would not be available during the scheduled time, but provided verbal

authorization to access the property. The following sampling and analysis procedures were

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Groundwater Sampling Report

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Texas

Langan Project No. 510026201

September 15, 2017

Page 3 of 6

conducted at each residence in accordance with Langan’s HCPCS approved June 2, 2017

Quality Assurance Project Plan (QAPP).

Upon arrival at each residence, Langan personnel introduced themselves and provided

Harris County identification. Additional Langan identification was provided upon request.

Langan personnel spoke to each homeowner regarding the location of the well, nearest

sampling tap, and any treatment systems in place between the well and the sampling

tap. Langan personnel also asked each resident if they were aware of the completion

depth of the well. This information was noted on the field data sheet, if provided.

Prior to sampling, a field data sheet was completed at each location. Langan personnel

noted the GPS coordinates of the well and sampling tap (if they were in different

locations), well casing condition (if visible), and weather conditions. Information provided

by the residents was incorporated into each field data sheet. Langan personnel included

a sketch of the property noting the location of the well and sampling tap on each field

data sheet, and took photos of each location. Copies of the field data sheets and

photograph logs are presented in Appendix A.

In general, a majority of the residents had taps available at either the well head or the

holding tanks located adjacent to the wells. In the absence of a sampling tap at either

the well head or holding tank, an exterior faucet that was located before any water

treatment was selected for sampling. The following exceptions were noted:

o Well-22: The exterior faucet available for Langan to sample at was located after a

water softener.

Each water sample was purged through a dedicated ¾-inch plastic barbed fitting and ½-

inch silicone tubing that was connected to a Horiba U-52 flow-through cell. In

accordance with Langan’s QAPP, the plastic fittings were pre-cleaned with Alcanox and

then rinsed twice with distilled water before being allowed to air dry. Water quality

parameters including pH, conductivity, temperature, turbidity, oxygen reduction

potential (ORP), dissolved oxygen (DO), and flow rate were noted on the field data

sheets at 3 minute intervals.

The flow-through cells were received pre-calibrated from Pine Environmental, Inc. Each

morning following the first day of use, the flow-through cell was calibrated in

accordance with the Horiba U-50 series calibration standard. An equipment calibration

log is presented in Appendix A.

A minimum of three water quality readings were taken at each sampling location. After

parameters stabilized or after 15 minutes of purging, the Horiba was disconnected. In

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Groundwater Sampling Report

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Texas

Langan Project No. 510026201

September 15, 2017

Page 4 of 6

general, samples were collected directly from the sampling tap. However, in some

instances, based on the tap location, it was necessary to collect the sample through the

dedicated barbed fitting and tubing. Langan then filled two 1-Liter amber glass bottles

for each sample. Locations where matrix spike/matrix spike duplicates (MS/MSDs) were

collected required filing six 1-L amber glass bottles. Each bottle was pre-cleaned and

provided directly from the laboratory. Bottles were filled to the top of the rim and

checked for air bubbles to confirm that a full liter of water was provided in each one.

Each sample collected was assigned a unique identification number (Well-#), where the

well identification number correlated to the list provided by HCPCS. Each sample

container had a sample label affixed to the outside with the project name, date, and

time of sample collection.

During sampling activities, in accordance with Langan’s QAPP and HCPCS guidance,

five blind duplicates and five MS/MSDs were collected. The blind duplicates were given

sample identifications of DUP-1 through DUP-5. In order to keep the duplicate sample

separate from the parent sample, no collection times were listed on either the sample

label or the COC. The blind duplicate and parent samples are listed below:

o DUP-1 : Well-39

o DUP-2 : Well-12

o DUP-3 : Well-33

o DUP-4 : Well-27

o DUP-5 : Well-38

Five MS/MSD samples were collected by sampling a specified location in triplicate, and

labeling for all bottleware for that well with the same well identification. As all sampling

was conducted through pre-cleaned, disposable fittings, no equipment blanks were

required during this sampling event.

As requested by HCPCS, a background sample was collected from the drinking water

well at the Sheldon Sports Complex in northeast Houston. Well sampling procedures at

this location were similar to those conducted at the residential properties listed above.

Immediately after collection, the samples were labeled and placed on ice in laboratory

provided insulated coolers to chill the samples. At the end of every day, the coolers

were secured and shipped overnight via Fed-Ex under laboratory provided chain-of-

custody (COC) forms to Eurofins Lancaster Laboratories Environmental, LLC, a state of

Texas certified laboratory, located at 2425 New Holland Pike in Lancaster, Pennsylvania.

Langan included a completed COC in each cooler that was shipped to the laboratory.

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Groundwater Sampling Report

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Texas

Langan Project No. 510026201

September 15, 2017

Page 5 of 6

In general, samples were received intact and within the appropriate temperature range.

One of the two coolers shipped on June 12 arrived at the lab on June 13, 2017 at an

elevated temperature of 6.1°F and contained samples from Well-45, Well-40, and Well-

24. Additionally, one of the bottles from sample Well-45 arrived broken. However, as

there was still one remaining sample bottle from this well, the sample was considered

acceptable for analysis.

4.0 LABORATORY ANALYTICAL RESULTS

Drinking water sampling results are summarized on Table 1. All laboratory analytical reports

were prepared by Eurofins and included a signed statement certifying that the laboratory was

NELAP (National Environmental Laboratory Accreditation Program) accredited under the Texas

Laboratory Accreditation Program for all methods, analytes, and matrices reported in the data

package. Data packages met the criteria for USEPA Level 4 Reporting. A copy of the analytical

reports and chain-of-custody forms are provided in Appendix B.

4.1 Sampling Results

The water samples were analyzed for the 17 congeners of dioxins and furans identified by

HCPCS. To determine toxic equivalencies (TEQs) of the well water samples, a toxic equivalency

factor (TEF) was applied to each congener. TEFs were applied as outlined in the December

2010 USEPA Guidance Document “Recommended Toxicity Equivalence Factors (TEFs) for

Human Health Rick Assessments of 2,3,7,8-Tetrachlorodibenzo-p-dioxin and Dioxin-like

Compounds”. TEFs listed in this document ranged from 0.0003 to 1, with most of the

equivalency factors being less than one. The TEFs were multiplied by the detected

concentration of the congener within each sample. In the case where a congener was not

detected above the laboratory detection limit (DL), the DL was used in calculating the TEQ.

The TEQs for the samples ranged from 0.280 pg/L to 1.951 pg/L, which is below the standard

MCL of 30 pg/L used for 2,3,7,8-TCDD.

Additionally, a background sample was collected at the Sheldon Sports Complex in northeast

Houston, to compare results of drinking water samples in the project areas to background

concentrations of dioxins and furans in well water outside the project area. The TEQ of the

background sample was 0.285 pg/L. which averaged slightly lower than most samples and

slightly higher than others.

4.2 Data Verification and Usability

A Level 4 Data Validation Report was completed for the water samples collected during the

project. The results of the report indicate that the data are considered valid and usable, as

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Groundwater Sampling Report

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Texas

Langan Project No. 510026201

September 15, 2017

Page 6 of 6

qualified. No major deficiencies were identified. The results of the data validation are

summarized in the memorandum provided in Appendix C.

5.0 CONCLUSIONS

The following is a summary of the major findings of this investigation:

Upon application of the TEFs, the TEQs ranged from 0.280 pg/L to 1.951 pg/L, which is

below the MCL of 30 pg/L used for 2,3,7,8-TCDD.

The TEQ for the background sample collected at the Sheldon Sports Complex was

0.285 pg/L.

A Level 4 Data Validation Report was completed to determine the validity and usability

of the data collected during this sampling event. It was determined that all data are valid

and useable, as qualified.

\\langan.com\data\HOU\data2\510026201\Office Data\Reports\Environmental\Water Well Sampling Report\FINAL Residential Drinking Water Well Sampling (Phase II)

Report_2017-09-15.docx

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TABLES

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Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units Result Q Result Q Result Q Result Q Result Q Result Q Result Q

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L 0.0965 U 0.445 U 0.202 U 0.245 U 0.0809 U 0.0877 U 0.13 U

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L 0.186 U 0.273 U 0.14 U 0.169 U 0.137 U 0.195 U 0.185 U

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L 0.108 U 0.181 U 0.0996 U 0.12 U 0.0773 U 0.116 U 0.135 U

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L 0.111 U 0.188 U 0.102 U 0.117 U 0.078 U 0.118 U 0.128 U

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L 0.117 U 0.2 U 0.104 U 0.13 U 0.0803 U 0.117 U 0.126 U

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L 0.103 U 0.222 U 0.0965 U 0.13 U 0.0854 U 0.136 U 0.0939 U

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L 0.298 U 1.58 J 1.23 J 1.2 J 0.23 U 0.328 U 0.253 U

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L 0.0612 U 0.304 U 0.105 U 0.143 U 0.0369 U 0.0667 U 0.0661 U

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L 0.0689 U 0.308 J 0.077 U 0.106 U 0.302 J 0.0725 U 0.0896 U

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L 0.0586 U 0.186 U 0.0663 U 0.105 U 0.0423 U 0.0596 U 0.0827 U

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L 0.0489 U 0.133 U 0.0571 U 0.0773 U 0.0367 U 0.0439 U 0.044 U

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L 0.0499 U 0.128 U 0.0526 U 0.0727 U 0.0376 U 0.0437 U 0.0431 U

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L 0.0549 U 0.188 U 0.0757 U 0.0948 U 0.0373 U 0.0458 U 0.0392 U

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L 0.0487 U 0.229 J 0.0569 U 0.0847 U 0.0364 U 0.0431 U 0.0427 U

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L 0.0465 U 0.17 U 0.0445 U 0.062 U 0.0454 U 0.0549 U 0.0518 U

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L 0.0557 U 0.216 U 0.0581 U 0.0815 U 0.0558 U 0.068 U 0.0592 U

OCTACHLORODIBENZOFURAN 0.0003 PG/L 0.183 U 0.33 U 0.15 U 0.193 U 0.107 U 0.211 U 0.128 U

TEQ_DIOXINS-EPA 0.364 0.945 0.432 0.536 0.284 0.365 0.407

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

WELL-6_06142017

06/14/2017

WELL-1_06142017

06/14/2017

WELL-5_06142017

06/14/2017

WELL-3_06152017

06/15/2017

WELL-2_06152017

06/15/2017

WELL-4_06132017

06/13/2017

WELL-7_06142017

06/14/2017

Page 1 of 8

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Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L

OCTACHLORODIBENZOFURAN 0.0003 PG/L

TEQ_DIOXINS-EPA

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

Result Q Result Q Result Q Result Q Result Q Result Q Result Q

0.147 U 0.0513 U 0.32 U 0.495 U 0.267 U 0.452 U 0.103 U

0.241 U 0.178 U 0.181 U 0.307 U 0.142 U 0.252 U 0.136 U

0.119 U 0.0827 U 0.156 U 0.207 U 0.118 J 0.23 J 0.0829 U

0.13 U 0.0824 U 0.152 U 0.217 U 0.117 U 0.152 U 0.0841 U

0.126 U 0.0792 U 0.157 U 0.222 U 0.121 U 0.179 U 0.0835 U

0.172 U 0.0641 U 0.158 U 0.227 U 0.0982 U 0.167 U 0.081 U

0.444 U 0.147 U 0.25 U 0.307 U 0.194 U 0.286 U 0.303 U

0.0859 U 0.0645 U 0.197 U 0.267 U 0.145 U 0.272 U 0.0406 U

0.122 U 0.0823 U 0.133 U 0.208 U 0.0933 U 0.157 U 0.063 U

0.099 U 0.0669 U 0.113 U 0.181 U 0.0974 J 0.154 U 0.0509 U

0.0639 U 0.0284 U 0.118 J 0.113 U 0.0654 U 0.0871 U 0.0315 U

0.0628 U 0.0295 U 0.0996 U 0.114 U 0.0622 U 0.0867 U 0.0313 U

0.0671 U 0.0375 U 0.142 U 0.171 U 0.0823 U 0.786 J 0.0333 U

0.0639 U 0.0352 U 0.113 U 0.121 U 0.0718 U 0.11 U 0.0321 U

0.0813 U 0.033 U 0.0862 U 0.132 U 0.0547 U 0.0692 U 0.0485 U

0.0933 U 0.0378 U 0.115 U 0.161 U 0.0696 U 0.0897 U 0.058 U

0.204 U 0.0895 U 0.198 U 0.323 U 0.176 U 0.263 U 0.12 U

0.497 0.297 0.656 1.011 0.522 0.949 0.300

WELL-9_06162017

06/16/2017

WELL-11_06152017

06/15/2017

DUP-2_06132017

06/13/2017

WELL-12_06132017

06/13/2017

WELL-10_06152017

06/15/2017

WELL-13_06142017

06/14/2017

WELL-8_06142017

06/14/2017

Page 2 of 8

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Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L

OCTACHLORODIBENZOFURAN 0.0003 PG/L

TEQ_DIOXINS-EPA

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

Result Q Result Q Result Q Result Q Result Q Result Q Result Q

0.319 U 0.322 U 0.374 U 0.0767 U 0.225 U 0.283 U 0.392 U

0.255 U 0.226 U 0.232 U 0.143 U 0.159 U 0.174 U 0.227 U

0.197 U 0.185 U 0.461 J 0.113 U 0.107 U 0.116 U 0.168 U

0.198 U 0.19 U 0.652 J 0.108 U 0.107 U 0.121 U 0.17 U

0.208 U 0.21 U 0.615 J 0.114 U 0.111 U 0.128 U 0.194 U

0.24 U 1.12 J 0.966 J 0.1 U 0.117 U 0.131 U 0.361 J

0.262 U 12.9 J 1.38 J 0.286 U 0.215 U 0.224 U 0.283 U

0.208 U 0.197 U 0.234 U 0.0512 U 0.209 J 0.158 U 0.274 U

0.355 J 0.169 U 0.149 U 0.0769 U 0.0954 U 0.116 U 0.173 U

0.129 U 0.149 U 0.797 J 0.0671 U 0.0808 U 0.107 U 0.187 U

0.143 U 0.114 U 0.627 J 0.0574 U 0.0693 U 0.0731 U 0.106 U

0.137 U 0.106 U 0.743 J 0.059 U 0.068 U 0.0697 U 0.102 U

0.197 U 0.161 U 1.71 J 0.0631 U 0.0784 U 0.0885 U 0.155 U

0.158 U 0.122 U 0.753 J 0.0557 U 0.0706 U 0.0877 U 0.137 U

0.206 U 0.104 U 0.501 J 0.0496 U 0.0504 U 0.0722 U 0.106 U

0.291 U 0.144 U 0.708 J 0.0561 U 0.0676 U 0.0968 U 0.131 U

0.343 U 0.367 U 1.33 J 0.129 U 0.16 U 0.195 U 0.289 U

0.776 0.744 1.452 0.306 0.496 0.580 0.817

WELL-20_06152017

06/15/2017

WELL-19_06132017

06/13/2017

WELL-17_06142017

06/14/2017

WELL-15_06152017

06/15/2017

WELL-14_06152017

06/15/2017

WELL-16_06152017

06/15/2017

WELL-18_06132017

06/13/2017

Page 3 of 8

Page 13: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L

OCTACHLORODIBENZOFURAN 0.0003 PG/L

TEQ_DIOXINS-EPA

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

Result Q Result Q Result Q Result Q Result Q

0.293 U 0.273 U 0.194 U 0.114 UJ 0.234 U

0.146 U 0.239 U 0.141 U 0.206 UJ 0.155 U

0.121 U 0.176 U 0.151 U 0.0913 U 0.124 U

0.123 U 0.182 U 0.147 U 0.0942 UJ 0.127 U

0.129 U 0.206 U 0.518 J 0.0936 U 0.132 U

0.158 U 0.772 J 0.123 U 0.0814 U 0.122 U

0.251 U 13.1 J 2.17 J 3.04 J 0.193 U

0.136 U 0.209 U 0.12 U 0.0859 UJ 0.13 U

0.11 U 0.141 U 0.0839 U 0.0878 U 0.433 J

0.0994 U 0.142 U 0.395 J 0.0747 U 0.0822 U

0.0629 U 0.183 U 0.0896 U 0.0367 U 0.0724 U

0.0596 U 0.179 U 0.45 J 0.0378 U 0.0688 U

0.0748 U 1.38 J 1.26 J 0.0478 U 0.0836 U

0.0738 U 0.23 U 0.0931 U 0.0358 U 0.0728 U

0.0527 U 0.187 U 0.0703 U 0.022 U 0.0479 U

0.0713 U 0.241 U 0.518 J 0.0274 UJ 0.0652 U

0.178 U 0.248 U 0.185 U 0.0755 U 0.196 U

0.553 0.849 0.747 0.400 0.510

WELL-21_06132017

06/13/2017

WELL-23_06132017

06/13/2017

WELL-25_06132017

06/13/2017

WELL-22_06152017

06/15/2017

WELL-24_06122017

06/12/2017

Page 4 of 8

Page 14: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L

OCTACHLORODIBENZOFURAN 0.0003 PG/L

TEQ_DIOXINS-EPA

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

Result Q Result Q Result Q Result Q Result Q Result Q Result Q

0.0679 U 0.941 U 0.292 U 0.265 U 0.196 U 0.0869 U 0.222 U

0.153 U 0.591 U 0.227 U 0.172 U 0.136 U 0.169 U 0.387 J

0.0943 U 0.568 J 0.141 U 0.138 U 0.107 U 0.0998 U 0.286 J

0.096 U 0.316 J 0.143 U 0.132 U 0.108 U 0.335 J 0.35 J

0.101 U 0.352 U 0.154 U 0.146 U 0.114 U 0.101 U 0.149 U

0.0921 U 0.994 J 0.142 U 0.123 U 0.116 U 0.0813 U 0.152 U

0.246 U 4.93 J 9.86 J 0.212 U 0.199 U 0.196 U 9.1 J

0.0462 U 0.581 U 0.174 U 0.152 U 0.128 U 0.0538 U 0.155 U

0.0527 U 0.342 U 0.125 U 0.105 U 0.128 J 0.0573 U 0.0906 U

0.0439 U 0.324 U 0.115 U 0.094 U 0.0763 U 0.0492 U 0.512 J

0.0433 U 0.198 U 0.0846 U 0.0662 U 0.067 U 0.0406 U 0.079 U

0.0434 U 0.184 U 0.0791 U 0.0638 U 0.0629 U 0.0416 U 0.0755 U

0.0473 U 0.32 U 0.106 U 0.096 U 0.094 U 0.0449 U 1.11 J

0.0435 U 0.444 J 0.0878 U 0.0744 U 0.073 U 0.0413 U 0.11 U

0.0455 U 0.142 U 0.0641 U 0.0687 U 0.0464 U 0.0408 U 0.0682 U

0.181 J 0.202 U 0.0849 U 0.0945 U 0.0624 U 0.0463 U 0.0967 U

0.0911 U 1.49 J 0.196 U 0.185 U 0.128 U 0.099 U 2.1 J

0.290 1.951 0.660 0.558 0.436 0.350 1.003

WELL-31_06152017

06/15/2017

WELL-26_06142017

06/14/2017

WELL-28_06152017

06/15/2017

WELL-29_06152017

06/15/2017

WELL-27_06152017

06/15/2017

DUP-4_06152017

06/15/2017

WELL-30_06142017

06/14/2017

Page 5 of 8

Page 15: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L

OCTACHLORODIBENZOFURAN 0.0003 PG/L

TEQ_DIOXINS-EPA

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

Result Q Result Q Result Q Result Q Result Q Result Q

0.319 U 0.073 U 0.0727 U 0.0699 U 0.329 U 0.236 U

0.188 U 0.166 U 0.15 U 0.138 U 0.454 U 0.185 U

0.16 U 0.102 U 0.0894 U 0.122 U 0.644 J 0.142 U

0.161 U 0.103 U 0.091 U 0.121 U 0.296 U 0.139 U

0.173 U 0.103 U 0.0905 U 0.119 U 0.299 U 0.154 U

0.148 U 0.0833 U 0.091 U 0.106 U 0.265 U 0.135 U

0.298 U 0.291 U 0.309 U 12.5 J 0.37 U 0.248 U

0.19 U 0.049 U 0.0435 U 0.056 U 0.247 U 0.147 U

0.131 U 0.0664 U 0.0594 U 0.0624 U 0.224 U 0.192 J

0.125 U 0.053 U 0.0518 U 0.0515 U 0.189 U 0.0966 U

0.107 U 0.0418 U 0.0407 U 0.0234 U 0.629 J 0.0723 U

0.0977 U 0.0417 U 0.0404 U 0.0245 U 0.204 U 0.0693 U

0.146 U 0.0437 U 0.0421 U 0.0245 U 0.202 U 0.096 U

0.118 U 0.0379 U 0.0412 U 0.029 U 0.208 U 0.0783 U

0.0929 U 0.0427 U 0.0665 U 0.0215 U 0.188 U 0.0587 U

0.122 U 0.053 U 0.0815 U 0.0322 U 0.232 U 0.0826 U

0.281 U 0.123 U 0.121 U 1.32 J 0.249 U 0.202 U

0.668 0.311 0.290 0.283 1.126 0.548

WELL-32_06152017

06/15/2017

WELL-34_06162017

06/16/2017

WELL-33_06142017

06/14/2017

DUP-3_06142017

06/14/2017

WELL-36_06132017

06/13/2017

WELL-35_06122017

06/12/2017

Page 6 of 8

Page 16: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L

OCTACHLORODIBENZOFURAN 0.0003 PG/L

TEQ_DIOXINS-EPA

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

Result Q Result Q Result Q Result Q Result Q

0.182 U 0.0991 U 0.0652 U 0.328 U 0.381 U

0.139 U 0.238 J 0.137 U 0.383 U 0.561 U

0.131 U 0.128 U 0.0827 U 0.321 U 0.366 U

0.126 U 0.129 U 0.0888 U 0.32 U 0.356 U

0.127 U 0.127 U 0.0844 U 0.329 U 0.388 U

0.129 U 0.0724 U 0.729 J 0.243 U 0.398 U

0.203 U 2.95 J 4.3 J 0.357 U 0.518 U

0.113 U 0.0925 U 0.0873 U 0.319 U 0.3 U

0.457 J 0.103 U 0.0655 U 0.262 U 0.297 U

0.0811 U 0.0804 U 0.0545 U 0.222 U 0.267 U

0.0707 U 0.05 U 0.04 U 0.246 U 0.299 U

0.069 U 0.0536 U 0.043 U 0.234 U 0.285 U

0.0738 U 1.12 J 0.0399 U 0.209 U 0.286 U

0.0716 U 0.0473 U 0.0387 U 0.239 U 0.281 U

0.0546 U 0.0338 U 0.0148 U 0.251 U 0.311 U

0.0715 U 0.0513 U 0.018 U 0.311 U 0.376 U

0.166 U 0.117 U 0.0847 U 3.17 J 4.73 J

0.440 0.542 0.280 1.016 1.300

WELL-39_06122017

06/12/2017

DUP-1_06122017

06/12/2017

WELL-37_06132017

06/13/2017

WELL-38_06162017

06/16/2017

DUP-5_06162017

06/16/2017

Page 7 of 8

Page 17: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Table 1

Summary of Drinking Water Analytical Results

Residential Drinking Water Well Sampling (Phase II)

Channelview and Highlands, Harris County, Texas

Langan Project No. 510026201

Chemical Name TEF MCL Units

2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 1 30 PG/L

1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 0.01 PG/L

OCTACHLORODIBENZO-P-DIOXIN 0.0003 PG/L

2,3,7,8-TETRACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8-PENTACHLORODIBENZOFURAN 0.03 PG/L

2,3,4,7,8-PENTACHLORODIBENZOFURAN 0.3 PG/L

1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 0.1 PG/L

2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 0.1 PG/L

1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 0.01 PG/L

1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 0.01 PG/L

OCTACHLORODIBENZOFURAN 0.0003 PG/L

TEQ_DIOXINS-EPA

Notes:

U - analyte not detected above the referenced reporting limit

J - estimated concentration

UJ - analyte not detected above the referenced reporting limit; the

reporting limit may be inaccurate or imprecise

Toxic Equivaliency Factors (TEFs) and Total Equivaliencies (TEQs)

calculated in accordance with the December 2010 USEPA guidance.

Sample ID

Sample Date

Result Q Result Q Result Q Result Q Result Q Result Q Result Q

0.0767 UJ 0.145 U 0.207 U 0.322 U 0.22 U 0.272 U 0.073 U

0.21 U 0.125 U 0.48 J 0.527 U 0.284 U 0.475 J 0.14 U

0.112 U 0.103 U 0.621 J 0.351 U 0.212 U 0.209 U 0.0905 U

0.115 UJ 0.105 U 0.606 J 0.369 U 0.217 U 0.234 U 0.0904 U

0.109 U 0.106 U 0.148 U 0.36 U 0.211 U 0.224 U 0.104 U

0.0915 U 0.103 U 1 J 0.39 U 0.184 U 0.26 U 0.0746 U

0.139 U 1.38 J 1.92 J 0.505 U 0.245 U 0.338 U 0.143 U

0.116 UJ 0.0851 U 0.156 J 0.318 U 0.204 U 0.3 U 0.0549 U

0.1 U 0.411 J 0.115 U 0.268 U 0.148 U 0.246 U 0.0686 U

0.0791 UJ 0.061 U 0.76 J 0.241 U 0.128 U 0.204 U 0.055 U

0.0447 U 0.0656 U 0.0996 U 0.27 U 0.12 U 0.22 U 0.0451 U

0.0575 U 0.228 J 0.649 J 0.501 J 0.105 U 0.208 U 0.0565 U

0.0552 U 0.0837 U 1.39 J 0.337 U 0.142 U 0.249 U 0.0428 U

0.0538 UJ 0.287 J 0.83 J 0.284 U 0.121 U 0.227 U 0.0368 U

0.0186 UJ 0.0482 U 0.714 J 0.323 U 0.141 U 0.215 U 0.0364 U

0.0202 U 0.307 J 0.861 J 0.365 U 0.178 U 0.25 U 0.0399 U

0.0915 U 0.131 U 0.191 U 0.411 U 1.87 J 1.84 J 0.0929 U

0.381 0.412 1.395 1.219 0.686 1.011 0.285

WELL-45_06122017

06/12/2017

WELL-47_06162017

06/16/2017

WELL-41_06152017

06/15/2017

WELL-44_06122017

06/12/2017

WELL-46_06122017

06/12/2017

WELL-40_06122017

06/12/2017

WELL-43_06152017

06/15/2017

Page 8 of 8

Page 18: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

FIGURES

Page 19: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

A

B

C

D

321 4

Project Drawing Title

HARRIS COUNTY TEXAS

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Project No.

Date

Scale

Drawn By

Submission Date

Sheet 1 of 3

Figure

510026201

08/11/2017

ALS

08/11/2017

.

Notes:Aerial basemap is provided through Langan’s Esri ArcGIS software licensing and ArcGIS online © 2011National Geographic Society, i-cubed.

1"=8,000'

FIGURE 1

8,000 0 8,0004,000

Feet

17220 Katy Freeway Suite 125

Houston, TX 77094

www.langan.com

Langan Engineering & Environmental Services, Inc.

Langan Engineering, Environmental, Surveying andLandscape Architecture, D.P.C.

Langan International LLC

Collectively known as Langan

BACKGROUND WELL LOCATION

PROJECT AREA #2

PROJECT AREA #1

GREATER PROJECT AREA #2

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A

B

C

D

321 4

Project Drawing Title

HARRIS COUNTY TEXAS

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© 2

01

3 L

an

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n

Project No.

Date

Scale

Drawn By

Submission Date

Sheet 2 of 3

Figure

510026201

08/11/2017

ALS

08/11/2017

.

Notes:Basemap is provided through Langan’s Esri ArcGIS software licensing and ArcGIS online © 2011National Geographic Society, i-cubed.

1"=2,500'

FIGURE 2

2,500 0 2,5001,250

Feet

17220 Katy Freeway Suite 125

Houston, TX 77094

www.langan.com

Langan Engineering & Environmental Services, Inc.

Langan Engineering, Environmental, Surveying andLandscape Architecture, D.P.C.

Langan International LLC

Collectively known as Langan

PROJECT AREA #1

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A

B

C

D

321 4

Project Drawing Title

HARRIS COUNTY TEXAS

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© 2

01

3 L

an

ga

n

Project No.

Date

Scale

Drawn By

Submission Date

Sheet 3 of 3

Figure

510026201

08/11/2017

ALS

08/11/2017

.

Notes:Basemap is provided through Langan’s Esri ArcGIS software licensing and ArcGIS online © 2011National Geographic Society, i-cubed.

1"=4,000'

FIGURE 3

4,000 0 4,0002,000

Feet

17220 Katy Freeway Suite 125

Houston, TX 77094

www.langan.com

Langan Engineering & Environmental Services, Inc.

Langan Engineering, Environmental, Surveying andLandscape Architecture, D.P.C.

Langan International LLC

Collectively known as Langan

PROJECT AREA #2

GREATER PROJECT AREA #2

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APPENDIX C

EPA Level 4 Data Validation Report

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Technical Memorandum

2700 Kelly Road, Suite 200 Warrington, PA 18976 T: 215.491.6500 F: 215.491.6501

Mailing Address: P.O. Box 1569 Doylestown, PA 18901

To: Alison Suarato, Langan Senior Staff Engineer

From: Emily Strake, Langan Senior Project Chemist/Risk Assessor

Date: July 17, 2017

Re: Level IV Data Validation Report

HCPCS Residential Drinking Water Well Sampling (Phase II)

Potable Water Samples Collected June 2017

Langan Project No.: 510026201

This memorandum presents the findings of an analytical data validation of the data generated

from the analysis of potable water samples collected June 2017 by Langan Engineering and

Environmental Services (“Langan”) for Harris County Pollution Control Services (HCPCS). The

samples were analyzed by Eurofins Lancaster Laboratories, Inc. of Lancaster, Pennsylvania

(Texas NELAP certification #T104704194-16-22) for dioxins/furans by the method specified

below.

Dioxins/furans by EPA Method 1613B

Table 1, below, summarizes the laboratory and client sample identification numbers, sample

collection dates, and analytical parameters subject to review.

TABLE 1: SAMPLE SUMMARY

SDG Lab

Sample ID

Client

Sample ID

Sample

Date Analytical Parameters

LEG01 9046924 DUP-1 6/12/17 Dioxins/Furans

LEG01 9046925 Well-44 6/12/17 Dioxins/Furans

LEG01 9046926 Well-46 6/12/17 Dioxins/Furans

LEG01 9046927 Well-39 6/12/17 Dioxins/Furans

LEG01 9046928 Well-35 6/12/17 Dioxins/Furans

LEG01 9046929 Well-45 6/12/17 Dioxins/Furans

LEG01 9046930 Well-45 MS 6/12/17 Dioxins/Furans

LEG01 9046931 Well-45 MSD 6/12/17 Dioxins/Furans

LEG01 9046932 Well-40 6/12/17 Dioxins/Furans

LEG01 9046933 Well-24 6/12/17 Dioxins/Furans

LEG02 9047719 DUP-2 6/13/17 Dioxins/Furans

LEG02 9047720 WELL-21 6/13/17 Dioxins/Furans

LEG02 9047721 WELL-12 6/13/17 Dioxins/Furans

LEG02 9047722 WELL-19 6/13/17 Dioxins/Furans

LEG02 9047723 WELL-4 6/13/17 Dioxins/Furans

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 2 of 42

SDG Lab

Sample ID

Client

Sample ID

Sample

Date Analytical Parameters

LEG02 9047724 WELL-23 6/13/17 Dioxins/Furans

LEG02 9047725 WELL-37 6/13/17 Dioxins/Furans

LEG02 9047726 WELL-18 6/13/17 Dioxins/Furans

LEG02 9047727 WELL-25 6/13/17 Dioxins/Furans

LEG02 9047728 WELL-36 6/13/17 Dioxins/Furans

LEG03 9050598 WELL-1 6/14/17 Dioxins/Furans

LEG03 9050599 WELL-1 MS 6/14/17 Dioxins/Furans

LEG03 9050600 WELL-1 MSD 6/14/17 Dioxins/Furans

LEG03 9050601 WELL-5 6/14/17 Dioxins/Furans

LEG03 9050602 WELL-33 6/14/17 Dioxins/Furans

LEG03 9050603 WELL-26 6/14/17 Dioxins/Furans

LEG03 9050604 WELL-6 6/14/17 Dioxins/Furans

LEG03 9050605 DUP-3 6/14/17 Dioxins/Furans

LEG03 9050606 WELL-13 6/14/17 Dioxins/Furans

LEG03 9050607 WELL-30 6/14/17 Dioxins/Furans

LEG03 9050608 WELL-17 6/14/17 Dioxins/Furans

LEG03 9050609 WELL-7 6/14/17 Dioxins/Furans

LEG03 9050610 WELL-8 6/14/17 Dioxins/Furans

LEG04 9052992 WELL-31 6/15/17 Dioxins/Furans

LEG04 9052993 WELL-22 6/15/17 Dioxins/Furans

LEG04 9052994 WELL-14 6/15/17 Dioxins/Furans

LEG04 9052995 WELL-32 6/15/17 Dioxins/Furans

LEG04 9052996 WELL-2 6/15/17 Dioxins/Furans

LEG04 9052997 WELL-20 6/15/17 Dioxins/Furans

LEG04 9052998 WELL-15 6/15/17 Dioxins/Furans

LEG04 9052999 WELL-10 6/15/17 Dioxins/Furans

LEG04 9053000 WELL-10 MS 6/15/17 Dioxins/Furans

LEG04 9053001 WELL-10 MSD 6/15/17 Dioxins/Furans

LEG05 9053005 WELL-28 6/15/17 Dioxins/Furans

LEG05 9053006 WELL-29 6/15/17 Dioxins/Furans

LEG05 9053007 WELL-3 6/15/17 Dioxins/Furans

LEG05 9053008 DUP-4 6/15/17 Dioxins/Furans

LEG05 9053009 WELL-27 6/15/17 Dioxins/Furans

LEG05 9053010 WELL-11 6/15/17 Dioxins/Furans

LEG05 9053011 WELL-11 MS 6/15/17 Dioxins/Furans

LEG05 9053012 WELL-11 MSD 6/15/17 Dioxins/Furans

LEG05 9053013 WELL-43 6/15/17 Dioxins/Furans

LEG05 9053014 WELL-41 6/15/17 Dioxins/Furans

LEG05 9053015 WELL-16 6/15/17 Dioxins/Furans

LEG06 9055450 WELL-34 6/16/17 Dioxins/Furans

LEG06 9055451 WELL-34 MS 6/16/17 Dioxins/Furans

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 3 of 42

SDG Lab

Sample ID

Client

Sample ID

Sample

Date Analytical Parameters

LEG06 9055452 WELL-34 MSD 6/16/17 Dioxins/Furans

LEG06 9055453 DUP-5 6/16/17 Dioxins/Furans

LEG06 9055454 WELL-38 6/16/17 Dioxins/Furans

LEG06 9055455 WELL-47 6/16/17 Dioxins/Furans

LEG06 9055456 WELL-9 6/16/17 Dioxins/Furans

PROJECT OBJECTIVES

The intended use of residential potable water data is to support evaluation of human health

risks to residents and to demonstrate attainment of risk-based screening levels.

VALIDATION OVERVIEW

This data validation was performed in accordance with TCEQ Regulatory Guidance Review and

Reporting of COC Concentration Data under TRPP (RG-366/TRPP-13), the EPA’s National

Functional Guidelines for Chlorinated CDDs and Chlorinated CDFs Data Review (EPA-540-R-11-

016, September, 2011) and the specifics of the method employed. Validation includes review of

the analytical data to verify that data are easily traceable and sufficiently complete to permit

logical reconstruction by a qualified individual other than the originator. Items subject to review

in this memorandum include holding times, sample preservation, sample containers,

HRGC/HRMS performance check, initial and continuing calibration, method blanks, labelled

compound recovery, matrix spike/spike duplicate results, OPR sample results, internal

standards, field duplicate results and compound quantitation.

As a result of the review process, the following qualifiers may be assigned to the data in

accordance with the USEPA’s guidelines and best professional judgment:

R – The sample results are unusable due to the quality of the data generated because

certain criteria were not met. The analyte may or may not be present in the sample.

J – The analyte was positively identified and the associated numerical value is the

approximate concentration of the analyte in the sample.

UJ – The analyte was not detected at a level greater than or equal to the reporting limit

(RL); however, the reported RL is approximate and may be inaccurate or imprecise.

U – The analyte was analyzed for, but was not detected at a level greater than or equal to

the level of the RL or the sample concentration for results impacted by blank

contamination.

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 4 of 42

NJ – The analysis indicates the presence of an analyte that has been "tentatively identified"

and the associated numerical value represents its approximate concentration.

X1 – The laboratory is not NELAC accredited under the Texas Laboratory Accreditation

Program for this analytes in this matrix analyzed by this method.

If any validation qualifiers are assigned these qualifiers should supersede any laboratory-applied

qualifiers. Data that is not qualified as a result of this data validation is considered acceptable

on the basis of the items specified for review. Data that is qualified as “R” are not sufficiently

valid and technically supportable to be used for data interpretation. Data that is otherwise

qualified due to minor data quality anomalies are usable, as qualified.

TABLE 2: VALIDATOR-APPLIED QUALIFICATION

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

DUP-1 1613B Total TCDD 41903-57-5 U

DUP-1 1613B Total TCDF 55722-27-5 U

DUP-1 1613B Total PeCDD 36088-22-9 U

DUP-1 1613B 12378-PeCDF 57117-41-6 U

DUP-1 1613B 23478-PeCDF 57117-31-4 U

DUP-1 1613B Total PeCDF 30402-15-4 U

DUP-1 1613B 123478-HxCDD 39227-28-6 U

DUP-1 1613B Total HxCDD 34465-46-8 U

DUP-1 1613B 123478-HxCDF 70648-26-9 U

DUP-1 1613B 123678-HxCDF 57117-44-9 U

DUP-1 1613B 123789-HxCDF 72918-21-9 U

DUP-1 1613B Total HxCDF 55684-94-1 U

DUP-1 1613B Total HpCDD 37871-00-4 U

DUP-1 1613B 1234678-HpCDF 67562-39-4 U

DUP-1 1613B 1234789-HpCDF 55673-89-7 U

DUP-1 1613B Total HpCDF 38998-75-3 U

DUP-1 1613B OCDD 3268-87-9 U

DUP-1 1613B OCDF 39001-02-0 J

DUP-1 1613B Total PCDD TOTPCDD U

DUP-1 1613B Total PCDF TOTPCDF U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 5 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

DUP-1 1613B Total PCDD/PCDF TOTPCDDDF U

Well-44 1613B 2378-TCDD 1746-01-6 U

Well-44 1613B Total TCDD 41903-57-5 U

Well-44 1613B Total TCDF 55722-27-5 U

Well-44 1613B 12378-PeCDD 40321-76-4 U

Well-44 1613B Total PeCDD 36088-22-9 U

Well-44 1613B 12378-PeCDF 57117-41-6 U

Well-44 1613B Total PeCDF 30402-15-4 U

Well-44 1613B Total HxCDD 34465-46-8 U

Well-44 1613B 123678-HxCDF 57117-44-9 J

Well-44 1613B 123789-HxCDF 72918-21-9 U

Well-44 1613B 234678-HxCDF 60851-34-5 U

Well-44 1613B Total HxCDF 55684-94-1 U

Well-44 1613B 1234678-HpCDD 35822-46-9 U

Well-44 1613B Total HpCDD 37871-00-4 U

Well-44 1613B 1234678-HpCDF 67562-39-4 U

Well-44 1613B 1234789-HpCDF 55673-89-7 U

Well-44 1613B Total HpCDF 38998-75-3 U

Well-44 1613B OCDD 3268-87-9 U

Well-44 1613B OCDF 39001-02-0 U

Well-44 1613B Total PCDD TOTPCDD U

Well-44 1613B Total PCDF TOTPCDF U

Well-44 1613B Total PCDD/PCDF TOTPCDDDF U

Well-46 1613B Total TCDD 41903-57-5 U

Well-46 1613B Total TCDF 55722-27-5 U

Well-46 1613B 12378-PeCDD 40321-76-4 J

Well-46 1613B Total PeCDD 36088-22-9 U

Well-46 1613B 12378-PeCDF 57117-41-6 U

Well-46 1613B 23478-PeCDF 57117-31-4 U

Well-46 1613B Total PeCDF 30402-15-4 U

Well-46 1613B Total HxCDD 34465-46-8 U

Well-46 1613B 123478-HxCDF 70648-26-9 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 6 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-46 1613B 123678-HxCDF 57117-44-9 U

Well-46 1613B 123789-HxCDF 72918-21-9 U

Well-46 1613B 234678-HxCDF 60851-34-5 U

Well-46 1613B Total HxCDF 55684-94-1 U

Well-46 1613B 1234678-HpCDD 35822-46-9 U

Well-46 1613B Total HpCDD 37871-00-4 U

Well-46 1613B 1234678-HpCDF 67562-39-4 U

Well-46 1613B Total HpCDF 38998-75-3 U

Well-46 1613B OCDD 3268-87-9 U

Well-46 1613B OCDF 39001-02-0 J

Well-46 1613B Total PCDD TOTPCDD U

Well-46 1613B Total PCDF TOTPCDF U

Well-46 1613B Total PCDD/PCDF TOTPCDDDF U

Well-39 1613B Total TCDD 41903-57-5 U

Well-39 1613B Total TCDF 55722-27-5 U

Well-39 1613B Total PeCDD 36088-22-9 U

Well-39 1613B 12378-PeCDF 57117-41-6 U

Well-39 1613B 23478-PeCDF 57117-31-4 U

Well-39 1613B Total PeCDF 30402-15-4 U

Well-39 1613B Total HxCDD 34465-46-8 U

Well-39 1613B 123478-HxCDF 70648-26-9 U

Well-39 1613B 123678-HxCDF 57117-44-9 U

Well-39 1613B 123789-HxCDF 72918-21-9 U

Well-39 1613B Total HxCDF 55684-94-1 U

Well-39 1613B Total HpCDD 37871-00-4 U

Well-39 1613B 1234678-HpCDF 67562-39-4 U

Well-39 1613B Total HpCDF 38998-75-3 U

Well-39 1613B OCDF 39001-02-0 J

Well-39 1613B Total PCDD TOTPCDD U

Well-39 1613B Total PCDF TOTPCDF U

Well-39 1613B Total PCDD/PCDF TOTPCDDDF U

Well-35 1613B Total TCDD 41903-57-5 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 7 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-35 1613B Total TCDF 55722-27-5 U

Well-35 1613B Total PeCDD 36088-22-9 U

Well-35 1613B 23478-PeCDF 57117-31-4 U

Well-35 1613B Total PeCDF 30402-15-4 U

Well-35 1613B 123478-HxCDD 39227-28-6 J

Well-35 1613B Total HxCDD 34465-46-8 U

Well-35 1613B 123478-HxCDF 70648-26-9 J

Well-35 1613B 123789-HxCDF 72918-21-9 U

Well-35 1613B Total HxCDF 55684-94-1 U

Well-35 1613B 1234678-HpCDD 35822-46-9 U

Well-35 1613B Total HpCDD 37871-00-4 U

Well-35 1613B 1234678-HpCDF 67562-39-4 U

Well-35 1613B 1234789-HpCDF 55673-89-7 U

Well-35 1613B Total HpCDF 38998-75-3 U

Well-35 1613B OCDD 3268-87-9 U

Well-35 1613B OCDF 39001-02-0 U

Well-35 1613B Total PCDD TOTPCDD U

Well-35 1613B Total PCDF TOTPCDF U

Well-35 1613B Total PCDD/PCDF TOTPCDDDF U

Well-45 1613B 2378-TCDD 1746-01-6 U

Well-45 1613B Total TCDD 41903-57-5 U

Well-45 1613B Total TCDF 55722-27-5 U

Well-45 1613B Total PeCDD 36088-22-9 U

Well-45 1613B 12378-PeCDF 57117-41-6 U

Well-45 1613B 23478-PeCDF 57117-31-4 U

Well-45 1613B Total PeCDF 30402-15-4 U

Well-45 1613B 123478-HxCDD 39227-28-6 U

Well-45 1613B Total HxCDD 34465-46-8 U

Well-45 1613B 123789-HxCDF 72918-21-9 U

Well-45 1613B Total HxCDF 55684-94-1 U

Well-45 1613B 1234678-HpCDD 35822-46-9 U

Well-45 1613B Total HpCDD 37871-00-4 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 8 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-45 1613B 1234678-HpCDF 67562-39-4 U

Well-45 1613B 1234789-HpCDF 55673-89-7 U

Well-45 1613B Total HpCDF 38998-75-3 U

Well-45 1613B OCDD 3268-87-9 U

Well-45 1613B OCDF 39001-02-0 J

Well-45 1613B Total PCDD TOTPCDD U

Well-45 1613B Total PCDF TOTPCDF U

Well-45 1613B Total PCDD/PCDF TOTPCDDDF U

Well-40 1613B 2378-TCDD 1746-01-6 UJ

Well-40 1613B Total TCDD 41903-57-5 U

Well-40 1613B 2378-TCDF 51207-31-9 UJ

Well-40 1613B Total TCDF 55722-27-5 U

Well-40 1613B 12378-PeCDD 40321-76-4 U

Well-40 1613B Total PeCDD 36088-22-9 U

Well-40 1613B 12378-PeCDF 57117-41-6 U

Well-40 1613B 23478-PeCDF 57117-31-4 UJ

Well-40 1613B Total PeCDF 30402-15-4 U

Well-40 1613B 123478-HxCDD 39227-28-6 U

Well-40 1613B 123678-HxCDD 57653-85-7 UJ

Well-40 1613B 123789-HxCDD 19408-74-3 U

Well-40 1613B Total HxCDD 34465-46-8 U

Well-40 1613B 123478-HxCDF 70648-26-9 U

Well-40 1613B 123678-HxCDF 57117-44-9 U

Well-40 1613B 123789-HxCDF 72918-21-9 U

Well-40 1613B 234678-HxCDF 60851-34-5 UJ

Well-40 1613B Total HxCDF 55684-94-1 U

Well-40 1613B 1234678-HpCDD 35822-46-9 U

Well-40 1613B Total HpCDD 37871-00-4 U

Well-40 1613B 1234678-HpCDF 67562-39-4 UJ

Well-40 1613B 1234789-HpCDF 55673-89-7 U

Well-40 1613B Total HpCDF 38998-75-3 U

Well-40 1613B OCDD 3268-87-9 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 9 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-40 1613B OCDF 39001-02-0 U

Well-40 1613B Total PCDD TOTPCDD U

Well-40 1613B Total PCDF TOTPCDF U

Well-40 1613B Total PCDD/PCDF TOTPCDDDF U

Well-24 1613B 2378-TCDD 1746-01-6 UJ

Well-24 1613B Total TCDD 41903-57-5 U

Well-24 1613B 2378-TCDF 51207-31-9 UJ

Well-24 1613B Total TCDF 55722-27-5 U

Well-24 1613B 12378-PeCDD 40321-76-4 UJ

Well-24 1613B Total PeCDD 36088-22-9 U

Well-24 1613B 12378-PeCDF 57117-41-6 U

Well-24 1613B 23478-PeCDF 57117-31-4 U

Well-24 1613B Total PeCDF 30402-15-4 U

Well-24 1613B 123478-HxCDD 39227-28-6 U

Well-24 1613B 123678-HxCDD 57653-85-7 UJ

Well-24 1613B 123789-HxCDD 19408-74-3 U

Well-24 1613B Total HxCDD 34465-46-8 U

Well-24 1613B 123478-HxCDF 70648-26-9 U

Well-24 1613B 123678-HxCDF 57117-44-9 U

Well-24 1613B 123789-HxCDF 72918-21-9 U

Well-24 1613B 234678-HxCDF 60851-34-5 U

Well-24 1613B Total HxCDF 55684-94-1 U

Well-24 1613B 1234678-HpCDD 35822-46-9 U

Well-24 1613B Total HpCDD 37871-00-4 U

Well-24 1613B 1234678-HpCDF 67562-39-4 U

Well-24 1613B 1234789-HpCDF 55673-89-7 UJ

Well-24 1613B Total HpCDF 38998-75-3 U

Well-24 1613B OCDD 3268-87-9 J

Well-24 1613B OCDF 39001-02-0 U

Well-24 1613B Total PCDD TOTPCDD U

Well-24 1613B Total PCDF TOTPCDF U

Well-24 1613B Total PCDD/PCDF TOTPCDDDF U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 10 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

DUP-2 1613B Total TCDD 41903-57-5 U

DUP-2 1613B Total PeCDD 36088-22-9 U

DUP-2 1613B 12378-PeCDF 57117-41-6 U

DUP-2 1613B Total PeCDF 30402-15-4 U

DUP-2 1613B Total HxCDD 34465-46-8 U

DUP-2 1613B 123478-HxCDF 70648-26-9 U

DUP-2 1613B 123789-HxCDF 72918-21-9 J

DUP-2 1613B Total HxCDF 55684-94-1 U

DUP-2 1613B 1234678-HpCDD 35822-46-9 U

DUP-2 1613B Total HpCDD 37871-00-4 U

DUP-2 1613B 1234678-HpCDF 67562-39-4 U

DUP-2 1613B 1234789-HpCDF 55673-89-7 U

DUP-2 1613B Total HpCDF 38998-75-3 U

DUP-2 1613B OCDD 3268-87-9 U

DUP-2 1613B OCDF 39001-02-0 U

DUP-2 1613B Total PCDD TOTPCDD U

DUP-2 1613B Total PCDF TOTPCDF U

DUP-2 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-21 1613B Total TCDF 55722-27-5 U

WELL-21 1613B Total PeCDD 36088-22-9 U

WELL-21 1613B 12378-PeCDF 57117-41-6 U

WELL-21 1613B 23478-PeCDF 57117-31-4 U

WELL-21 1613B Total PeCDF 30402-15-4 U

WELL-21 1613B Total HxCDD 34465-46-8 U

WELL-21 1613B 123678-HxCDF 57117-44-9 U

WELL-21 1613B 123789-HxCDF 72918-21-9 U

WELL-21 1613B 234678-HxCDF 60851-34-5 U

WELL-21 1613B Total HxCDF 55684-94-1 U

WELL-21 1613B 1234678-HpCDD 35822-46-9 U

WELL-21 1613B Total HpCDD 37871-00-4 U

WELL-21 1613B 1234678-HpCDF 67562-39-4 U

WELL-21 1613B 1234789-HpCDF 55673-89-7 U

Page 33: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 11 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-21 1613B Total HpCDF 38998-75-3 U

WELL-21 1613B OCDD 3268-87-9 U

WELL-21 1613B OCDF 39001-02-0 U

WELL-21 1613B Total PCDD TOTPCDD U

WELL-21 1613B Total PCDF TOTPCDF U

WELL-21 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-12 1613B Total TCDD 41903-57-5 U

WELL-12 1613B 12378-PeCDD 40321-76-4 U

WELL-12 1613B Total PeCDD 36088-22-9 U

WELL-12 1613B 12378-PeCDF 57117-41-6 U

WELL-12 1613B Total PeCDF 30402-15-4 U

WELL-12 1613B Total HxCDD 34465-46-8 U

WELL-12 1613B 123789-HxCDF 72918-21-9 U

WELL-12 1613B Total HxCDF 55684-94-1 U

WELL-12 1613B 1234678-HpCDD 35822-46-9 U

WELL-12 1613B Total HpCDD 37871-00-4 U

WELL-12 1613B 1234678-HpCDF 67562-39-4 U

WELL-12 1613B 1234789-HpCDF 55673-89-7 U

WELL-12 1613B Total HpCDF 38998-75-3 U

WELL-12 1613B OCDD 3268-87-9 U

WELL-12 1613B OCDF 39001-02-0 U

WELL-12 1613B Total PCDD TOTPCDD U

WELL-12 1613B Total PCDF TOTPCDF U

WELL-12 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-19 1613B Total TCDD 41903-57-5 U

WELL-19 1613B Total PeCDD 36088-22-9 U

WELL-19 1613B 12378-PeCDF 57117-41-6 U

WELL-19 1613B Total PeCDF 30402-15-4 U

WELL-19 1613B Total HxCDD 34465-46-8 U

WELL-19 1613B 123478-HxCDF 70648-26-9 U

WELL-19 1613B 123678-HxCDF 57117-44-9 U

WELL-19 1613B 123789-HxCDF 72918-21-9 U

Page 34: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 12 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-19 1613B 234678-HxCDF 60851-34-5 U

WELL-19 1613B Total HxCDF 55684-94-1 U

WELL-19 1613B 1234678-HpCDD 35822-46-9 U

WELL-19 1613B Total HpCDD 37871-00-4 U

WELL-19 1613B 1234678-HpCDF 67562-39-4 U

WELL-19 1613B 1234789-HpCDF 55673-89-7 U

WELL-19 1613B Total HpCDF 38998-75-3 U

WELL-19 1613B OCDD 3268-87-9 U

WELL-19 1613B OCDF 39001-02-0 U

WELL-19 1613B Total PCDD TOTPCDD U

WELL-19 1613B Total PCDF TOTPCDF U

WELL-19 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-4 1613B 2378-TCDD 1746-01-6 U

WELL-4 1613B Total TCDD 41903-57-5 U

WELL-4 1613B Total TCDF 55722-27-5 U

WELL-4 1613B Total PeCDD 36088-22-9 U

WELL-4 1613B 12378-PeCDF 57117-41-6 U

WELL-4 1613B Total PeCDF 30402-15-4 U

WELL-4 1613B Total HxCDD 34465-46-8 U

WELL-4 1613B 123789-HxCDF 72918-21-9 U

WELL-4 1613B 234678-HxCDF 60851-34-5 U

WELL-4 1613B Total HxCDF 55684-94-1 U

WELL-4 1613B 1234678-HpCDD 35822-46-9 U

WELL-4 1613B Total HpCDD 37871-00-4 U

WELL-4 1613B 1234678-HpCDF 67562-39-4 U

WELL-4 1613B Total HpCDF 38998-75-3 U

WELL-4 1613B OCDD 3268-87-9 J

WELL-4 1613B OCDF 39001-02-0 U

WELL-4 1613B Total PCDD TOTPCDD U

WELL-4 1613B Total PCDF TOTPCDF U

WELL-4 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-23 1613B 2378-TCDD 1746-01-6 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 13 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-23 1613B Total TCDD 41903-57-5 U

WELL-23 1613B Total TCDF 55722-27-5 U

WELL-23 1613B 12378-PeCDD 40321-76-4 U

WELL-23 1613B Total PeCDD 36088-22-9 U

WELL-23 1613B Total PeCDF 30402-15-4 U

WELL-23 1613B 123478-HxCDD 39227-28-6 U

WELL-23 1613B 123678-HxCDD 57653-85-7 U

WELL-23 1613B 123789-HxCDD 19408-74-3 J

WELL-23 1613B Total HxCDD 34465-46-8 U

WELL-23 1613B 123478-HxCDF 70648-26-9 U

WELL-23 1613B 123678-HxCDF 57117-44-9 J

WELL-23 1613B 123789-HxCDF 72918-21-9 J

WELL-23 1613B 234678-HxCDF 60851-34-5 U

WELL-23 1613B Total HxCDF 55684-94-1 U

WELL-23 1613B 1234678-HpCDD 35822-46-9 U

WELL-23 1613B Total HpCDD 37871-00-4 U

WELL-23 1613B 1234678-HpCDF 67562-39-4 U

WELL-23 1613B 1234789-HpCDF 55673-89-7 J

WELL-23 1613B Total HpCDF 38998-75-3 U

WELL-23 1613B OCDD 3268-87-9 J

WELL-23 1613B OCDF 39001-02-0 U

WELL-23 1613B Total PCDD TOTPCDD U

WELL-23 1613B Total PCDF TOTPCDF U

WELL-23 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-37 1613B Total TCDD 41903-57-5 U

WELL-37 1613B 2378-TCDF 51207-31-9 U

WELL-37 1613B Total TCDF 55722-27-5 U

WELL-37 1613B Total PeCDD 36088-22-9 U

WELL-37 1613B 12378-PeCDF 57117-41-6 J

WELL-37 1613B 23478-PeCDF 57117-31-4 U

WELL-37 1613B Total PeCDF 30402-15-4 U

WELL-37 1613B 123678-HxCDD 57653-85-7 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 14 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-37 1613B Total HxCDD 34465-46-8 U

WELL-37 1613B 123478-HxCDF 70648-26-9 U

WELL-37 1613B 123678-HxCDF 57117-44-9 U

WELL-37 1613B 123789-HxCDF 72918-21-9 U

WELL-37 1613B 234678-HxCDF 60851-34-5 U

WELL-37 1613B Total HxCDF 55684-94-1 U

WELL-37 1613B 1234678-HpCDD 35822-46-9 U

WELL-37 1613B Total HpCDD 37871-00-4 U

WELL-37 1613B 1234678-HpCDF 67562-39-4 U

WELL-37 1613B 1234789-HpCDF 55673-89-7 U

WELL-37 1613B Total HpCDF 38998-75-3 U

WELL-37 1613B OCDD 3268-87-9 U

WELL-37 1613B OCDF 39001-02-0 U

WELL-37 1613B Total PCDD TOTPCDD U

WELL-37 1613B Total PCDF TOTPCDF U

WELL-37 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-18 1613B Total TCDD 41903-57-5 U

WELL-18 1613B Total TCDF 55722-27-5 U

WELL-18 1613B 12378-PeCDD 40321-76-4 U

WELL-18 1613B Total PeCDD 36088-22-9 U

WELL-18 1613B 12378-PeCDF 57117-41-6 U

WELL-18 1613B 23478-PeCDF 57117-31-4 U

WELL-18 1613B Total PeCDF 30402-15-4 U

WELL-18 1613B 123478-HxCDD 39227-28-6 U

WELL-18 1613B 123678-HxCDD 57653-85-7 U

WELL-18 1613B 123789-HxCDD 19408-74-3 U

WELL-18 1613B Total HxCDD 34465-46-8 U

WELL-18 1613B 123478-HxCDF 70648-26-9 U

WELL-18 1613B 123678-HxCDF 57117-44-9 U

WELL-18 1613B 123789-HxCDF 72918-21-9 U

WELL-18 1613B 234678-HxCDF 60851-34-5 U

WELL-18 1613B Total HxCDF 55684-94-1 U

Page 37: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 15 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-18 1613B 1234678-HpCDD 35822-46-9 U

WELL-18 1613B Total HpCDD 37871-00-4 U

WELL-18 1613B 1234678-HpCDF 67562-39-4 U

WELL-18 1613B 1234789-HpCDF 55673-89-7 U

WELL-18 1613B Total HpCDF 38998-75-3 U

WELL-18 1613B OCDD 3268-87-9 U

WELL-18 1613B OCDF 39001-02-0 U

WELL-18 1613B Total PCDD TOTPCDD U

WELL-18 1613B Total PCDF TOTPCDF U

WELL-18 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-25 1613B Total TCDD 41903-57-5 U

WELL-25 1613B 2378-TCDF 51207-31-9 U

WELL-25 1613B Total TCDF 55722-27-5 U

WELL-25 1613B 12378-PeCDD 40321-76-4 U

WELL-25 1613B Total PeCDD 36088-22-9 U

WELL-25 1613B 12378-PeCDF 57117-41-6 J

WELL-25 1613B 23478-PeCDF 57117-31-4 U

WELL-25 1613B Total PeCDF 30402-15-4 U

WELL-25 1613B 123478-HxCDD 39227-28-6 U

WELL-25 1613B 123789-HxCDD 19408-74-3 U

WELL-25 1613B Total HxCDD 34465-46-8 U

WELL-25 1613B 123478-HxCDF 70648-26-9 U

WELL-25 1613B 123678-HxCDF 57117-44-9 U

WELL-25 1613B 123789-HxCDF 72918-21-9 U

WELL-25 1613B 234678-HxCDF 60851-34-5 U

WELL-25 1613B Total HxCDF 55684-94-1 U

WELL-25 1613B 1234678-HpCDD 35822-46-9 U

WELL-25 1613B Total HpCDD 37871-00-4 U

WELL-25 1613B 1234678-HpCDF 67562-39-4 U

WELL-25 1613B 1234789-HpCDF 55673-89-7 U

WELL-25 1613B Total HpCDF 38998-75-3 U

WELL-25 1613B OCDD 3268-87-9 U

Page 38: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 16 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-25 1613B OCDF 39001-02-0 U

WELL-25 1613B Total PCDD TOTPCDD U

WELL-25 1613B Total PCDF TOTPCDF U

WELL-25 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-36 1613B Total TCDF 55722-27-5 U

WELL-36 1613B 12378-PeCDD 40321-76-4 U

WELL-36 1613B Total PeCDD 36088-22-9 U

WELL-36 1613B 23478-PeCDF 57117-31-4 U

WELL-36 1613B Total PeCDF 30402-15-4 U

WELL-36 1613B 123478-HxCDD 39227-28-6 U

WELL-36 1613B 123678-HxCDD 57653-85-7 U

WELL-36 1613B 123789-HxCDD 19408-74-3 U

WELL-36 1613B Total HxCDD 34465-46-8 U

WELL-36 1613B 123478-HxCDF 70648-26-9 U

WELL-36 1613B 123678-HxCDF 57117-44-9 U

WELL-36 1613B 123789-HxCDF 72918-21-9 U

WELL-36 1613B Total HxCDF 55684-94-1 U

WELL-36 1613B 1234678-HpCDD 35822-46-9 U

WELL-36 1613B Total HpCDD 37871-00-4 U

WELL-36 1613B 1234678-HpCDF 67562-39-4 U

WELL-36 1613B Total HpCDF 38998-75-3 U

WELL-36 1613B OCDD 3268-87-9 U

WELL-36 1613B OCDF 39001-02-0 U

WELL-36 1613B Total PCDD TOTPCDD U

WELL-36 1613B Total PCDF TOTPCDF U

WELL-36 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-1 1613B 2378-TCDD 1746-01-6 U

WELL-1 1613B Total TCDD 41903-57-5 U

WELL-1 1613B 2378-TCDF 51207-31-9 U

WELL-1 1613B Total TCDF 55722-27-5 U

WELL-1 1613B Total PeCDD 36088-22-9 U

WELL-1 1613B 12378-PeCDF 57117-41-6 U

Page 39: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 17 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-1 1613B 23478-PeCDF 57117-31-4 U

WELL-1 1613B Total PeCDF 30402-15-4 U

WELL-1 1613B 123678-HxCDD 57653-85-7 U

WELL-1 1613B 123789-HxCDD 19408-74-3 U

WELL-1 1613B Total HxCDD 34465-46-8 U

WELL-1 1613B 123478-HxCDF 70648-26-9 U

WELL-1 1613B 123678-HxCDF 57117-44-9 U

WELL-1 1613B 123789-HxCDF 72918-21-9 U

WELL-1 1613B 234678-HxCDF 60851-34-5 U

WELL-1 1613B Total HxCDF 55684-94-1 U

WELL-1 1613B 1234678-HpCDD 35822-46-9 U

WELL-1 1613B Total HpCDD 37871-00-4 U

WELL-1 1613B 1234678-HpCDF 67562-39-4 U

WELL-1 1613B 1234789-HpCDF 55673-89-7 U

WELL-1 1613B Total HpCDF 38998-75-3 U

WELL-1 1613B OCDF 39001-02-0 U

WELL-1 1613B Total PCDD TOTPCDD U

WELL-1 1613B Total PCDF TOTPCDF U

WELL-1 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-5 1613B Total TCDD 41903-57-5 U

WELL-5 1613B Total TCDF 55722-27-5 U

WELL-5 1613B Total PeCDD 36088-22-9 U

WELL-5 1613B 12378-PeCDF 57117-41-6 J

WELL-5 1613B 23478-PeCDF 57117-31-4 U

WELL-5 1613B Total PeCDF 30402-15-4 U

WELL-5 1613B 123789-HxCDD 19408-74-3 U

WELL-5 1613B Total HxCDD 34465-46-8 U

WELL-5 1613B 123478-HxCDF 70648-26-9 U

WELL-5 1613B 123678-HxCDF 57117-44-9 U

WELL-5 1613B 123789-HxCDF 72918-21-9 U

WELL-5 1613B 234678-HxCDF 60851-34-5 U

WELL-5 1613B Total HxCDF 55684-94-1 U

Page 40: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 18 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-5 1613B 1234678-HpCDD 35822-46-9 U

WELL-5 1613B Total HpCDD 37871-00-4 U

WELL-5 1613B 1234678-HpCDF 67562-39-4 U

WELL-5 1613B Total HpCDF 38998-75-3 U

WELL-5 1613B OCDD 3268-87-9 U

WELL-5 1613B OCDF 39001-02-0 U

WELL-5 1613B Total PCDD TOTPCDD U

WELL-5 1613B Total PCDF TOTPCDF U

WELL-5 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-33 1613B Total TCDD 41903-57-5 U

WELL-33 1613B 2378-TCDF 51207-31-9 U

WELL-33 1613B Total TCDF 55722-27-5 U

WELL-33 1613B 12378-PeCDD 40321-76-4 U

WELL-33 1613B Total PeCDD 36088-22-9 U

WELL-33 1613B 12378-PeCDF 57117-41-6 U

WELL-33 1613B 23478-PeCDF 57117-31-4 U

WELL-33 1613B Total PeCDF 30402-15-4 U

WELL-33 1613B 123478-HxCDD 39227-28-6 U

WELL-33 1613B 123678-HxCDD 57653-85-7 U

WELL-33 1613B 123789-HxCDD 19408-74-3 U

WELL-33 1613B Total HxCDD 34465-46-8 U

WELL-33 1613B 123678-HxCDF 57117-44-9 U

WELL-33 1613B 123789-HxCDF 72918-21-9 U

WELL-33 1613B 234678-HxCDF 60851-34-5 U

WELL-33 1613B Total HxCDF 55684-94-1 U

WELL-33 1613B 1234678-HpCDD 35822-46-9 U

WELL-33 1613B Total HpCDD 37871-00-4 U

WELL-33 1613B 1234678-HpCDF 67562-39-4 U

WELL-33 1613B 1234789-HpCDF 55673-89-7 U

WELL-33 1613B Total HpCDF 38998-75-3 U

WELL-33 1613B OCDD 3268-87-9 U

WELL-33 1613B OCDF 39001-02-0 U

Page 41: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 19 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-33 1613B Total PCDD TOTPCDD U

WELL-33 1613B Total PCDF TOTPCDF U

WELL-33 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-26 1613B Total TCDD 41903-57-5 U

WELL-26 1613B 2378-TCDF 51207-31-9 U

WELL-26 1613B Total TCDF 55722-27-5 U

WELL-26 1613B Total PeCDD 36088-22-9 U

WELL-26 1613B 12378-PeCDF 57117-41-6 U

WELL-26 1613B 23478-PeCDF 57117-31-4 U

WELL-26 1613B Total PeCDF 30402-15-4 U

WELL-26 1613B 123789-HxCDD 19408-74-3 U

WELL-26 1613B Total HxCDD 34465-46-8 U

WELL-26 1613B 123478-HxCDF 70648-26-9 U

WELL-26 1613B 123678-HxCDF 57117-44-9 U

WELL-26 1613B 123789-HxCDF 72918-21-9 U

WELL-26 1613B 234678-HxCDF 60851-34-5 U

WELL-26 1613B Total HxCDF 55684-94-1 U

WELL-26 1613B 1234678-HpCDD 35822-46-9 U

WELL-26 1613B Total HpCDD 37871-00-4 U

WELL-26 1613B 1234678-HpCDF 67562-39-4 U

WELL-26 1613B 1234789-HpCDF 55673-89-7 J

WELL-26 1613B Total HpCDF 38998-75-3 U

WELL-26 1613B OCDD 3268-87-9 U

WELL-26 1613B OCDF 39001-02-0 U

WELL-26 1613B Total PCDD TOTPCDD U

WELL-26 1613B Total PCDF TOTPCDF U

WELL-26 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-6 1613B Total TCDD 41903-57-5 U

WELL-6 1613B 2378-TCDF 51207-31-9 U

WELL-6 1613B Total TCDF 55722-27-5 U

WELL-6 1613B 12378-PeCDD 40321-76-4 U

WELL-6 1613B Total PeCDD 36088-22-9 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 20 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-6 1613B 12378-PeCDF 57117-41-6 U

WELL-6 1613B 23478-PeCDF 57117-31-4 U

WELL-6 1613B Total PeCDF 30402-15-4 U

WELL-6 1613B 123789-HxCDD 19408-74-3 U

WELL-6 1613B Total HxCDD 34465-46-8 U

WELL-6 1613B 123478-HxCDF 70648-26-9 U

WELL-6 1613B 123678-HxCDF 57117-44-9 U

WELL-6 1613B 123789-HxCDF 72918-21-9 U

WELL-6 1613B 234678-HxCDF 60851-34-5 U

WELL-6 1613B Total HxCDF 55684-94-1 U

WELL-6 1613B 1234678-HpCDD 35822-46-9 U

WELL-6 1613B Total HpCDD 37871-00-4 U

WELL-6 1613B 1234789-HpCDF 55673-89-7 U

WELL-6 1613B Total HpCDF 38998-75-3 U

WELL-6 1613B OCDD 3268-87-9 U

WELL-6 1613B OCDF 39001-02-0 U

WELL-6 1613B Total PCDD TOTPCDD U

WELL-6 1613B Total PCDF TOTPCDF U

WELL-6 1613B Total PCDD/PCDF TOTPCDDDF U

DUP-3 1613B 2378-TCDD 1746-01-6 U

DUP-3 1613B Total TCDD 41903-57-5 U

DUP-3 1613B 2378-TCDF 51207-31-9 U

DUP-3 1613B Total TCDF 55722-27-5 U

DUP-3 1613B 12378-PeCDD 40321-76-4 U

DUP-3 1613B Total PeCDD 36088-22-9 U

DUP-3 1613B 12378-PeCDF 57117-41-6 U

DUP-3 1613B Total PeCDF 30402-15-4 U

DUP-3 1613B 123678-HxCDD 57653-85-7 U

DUP-3 1613B Total HxCDD 34465-46-8 U

DUP-3 1613B 123478-HxCDF 70648-26-9 U

DUP-3 1613B 123789-HxCDF 72918-21-9 U

DUP-3 1613B 234678-HxCDF 60851-34-5 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 21 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

DUP-3 1613B Total HxCDF 55684-94-1 U

DUP-3 1613B 1234678-HpCDD 35822-46-9 U

DUP-3 1613B Total HpCDD 37871-00-4 U

DUP-3 1613B 1234678-HpCDF 67562-39-4 U

DUP-3 1613B 1234789-HpCDF 55673-89-7 U

DUP-3 1613B Total HpCDF 38998-75-3 U

DUP-3 1613B OCDD 3268-87-9 U

DUP-3 1613B OCDF 39001-02-0 U

DUP-3 1613B Total PCDD TOTPCDD U

DUP-3 1613B Total PCDF TOTPCDF U

DUP-3 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-13 1613B Total TCDD 41903-57-5 U

WELL-13 1613B 2378-TCDF 51207-31-9 U

WELL-13 1613B Total TCDF 55722-27-5 U

WELL-13 1613B Total PeCDD 36088-22-9 U

WELL-13 1613B 12378-PeCDF 57117-41-6 U

WELL-13 1613B Total PeCDF 30402-15-4 U

WELL-13 1613B 123478-HxCDD 39227-28-6 U

WELL-13 1613B Total HxCDD 34465-46-8 U

WELL-13 1613B 123678-HxCDF 57117-44-9 U

WELL-13 1613B 123789-HxCDF 72918-21-9 U

WELL-13 1613B 234678-HxCDF 60851-34-5 U

WELL-13 1613B Total HxCDF 55684-94-1 U

WELL-13 1613B 1234678-HpCDD 35822-46-9 U

WELL-13 1613B Total HpCDD 37871-00-4 U

WELL-13 1613B 1234789-HpCDF 55673-89-7 U

WELL-13 1613B Total HpCDF 38998-75-3 U

WELL-13 1613B OCDD 3268-87-9 U

WELL-13 1613B OCDF 39001-02-0 U

WELL-13 1613B Total PCDD TOTPCDD U

WELL-13 1613B Total PCDF TOTPCDF U

WELL-13 1613B Total PCDD/PCDF TOTPCDDDF U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 22 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-30 1613B 2378-TCDD 1746-01-6 U

WELL-30 1613B Total TCDD 41903-57-5 U

WELL-30 1613B Total TCDF 55722-27-5 U

WELL-30 1613B 12378-PeCDD 40321-76-4 U

WELL-30 1613B Total PeCDD 36088-22-9 U

WELL-30 1613B 23478-PeCDF 57117-31-4 U

WELL-30 1613B Total PeCDF 30402-15-4 U

WELL-30 1613B 123478-HxCDD 39227-28-6 U

WELL-30 1613B 123678-HxCDD 57653-85-7 J

WELL-30 1613B Total HxCDD 34465-46-8 U

WELL-30 1613B 123478-HxCDF 70648-26-9 U

WELL-30 1613B 123678-HxCDF 57117-44-9 U

WELL-30 1613B 123789-HxCDF 72918-21-9 U

WELL-30 1613B 234678-HxCDF 60851-34-5 U

WELL-30 1613B Total HxCDF 55684-94-1 U

WELL-30 1613B 1234678-HpCDD 35822-46-9 U

WELL-30 1613B Total HpCDD 37871-00-4 U

WELL-30 1613B 1234789-HpCDF 55673-89-7 U

WELL-30 1613B Total HpCDF 38998-75-3 U

WELL-30 1613B OCDD 3268-87-9 U

WELL-30 1613B OCDF 39001-02-0 U

WELL-30 1613B Total PCDD TOTPCDD U

WELL-30 1613B Total PCDF TOTPCDF U

WELL-30 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-17 1613B Total TCDD 41903-57-5 U

WELL-17 1613B 2378-TCDF 51207-31-9 U

WELL-17 1613B Total TCDF 55722-27-5 U

WELL-17 1613B 12378-PeCDD 40321-76-4 U

WELL-17 1613B Total PeCDD 36088-22-9 U

WELL-17 1613B 23478-PeCDF 57117-31-4 U

WELL-17 1613B Total PeCDF 30402-15-4 U

WELL-17 1613B 123478-HxCDD 39227-28-6 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 23 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-17 1613B 123678-HxCDD 57653-85-7 U

WELL-17 1613B 123789-HxCDD 19408-74-3 U

WELL-17 1613B Total HxCDD 34465-46-8 U

WELL-17 1613B 123478-HxCDF 70648-26-9 U

WELL-17 1613B 123678-HxCDF 57117-44-9 U

WELL-17 1613B 123789-HxCDF 72918-21-9 U

WELL-17 1613B 234678-HxCDF 60851-34-5 U

WELL-17 1613B Total HxCDF 55684-94-1 U

WELL-17 1613B 1234678-HpCDD 35822-46-9 U

WELL-17 1613B Total HpCDD 37871-00-4 U

WELL-17 1613B 1234678-HpCDF 67562-39-4 U

WELL-17 1613B 1234789-HpCDF 55673-89-7 U

WELL-17 1613B Total HpCDF 38998-75-3 U

WELL-17 1613B OCDD 3268-87-9 U

WELL-17 1613B OCDF 39001-02-0 U

WELL-17 1613B Total PCDD TOTPCDD U

WELL-17 1613B Total PCDF TOTPCDF U

WELL-17 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-7 1613B Total TCDD 41903-57-5 U

WELL-7 1613B 2378-TCDF 51207-31-9 U

WELL-7 1613B Total TCDF 55722-27-5 U

WELL-7 1613B Total PeCDD 36088-22-9 U

WELL-7 1613B 12378-PeCDF 57117-41-6 U

WELL-7 1613B Total PeCDF 30402-15-4 U

WELL-7 1613B Total HxCDD 34465-46-8 U

WELL-7 1613B 123478-HxCDF 70648-26-9 U

WELL-7 1613B 123789-HxCDF 72918-21-9 U

WELL-7 1613B 234678-HxCDF 60851-34-5 U

WELL-7 1613B Total HxCDF 55684-94-1 U

WELL-7 1613B 1234678-HpCDD 35822-46-9 U

WELL-7 1613B Total HpCDD 37871-00-4 U

WELL-7 1613B OCDD 3268-87-9 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 24 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-7 1613B OCDF 39001-02-0 U

WELL-7 1613B Total PCDD TOTPCDD U

WELL-7 1613B Total PCDF TOTPCDF U

WELL-7 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-8 1613B Total TCDD 41903-57-5 U

WELL-8 1613B 2378-TCDF 51207-31-9 U

WELL-8 1613B Total TCDF 55722-27-5 U

WELL-8 1613B Total PeCDD 36088-22-9 U

WELL-8 1613B 12378-PeCDF 57117-41-6 U

WELL-8 1613B 23478-PeCDF 57117-31-4 U

WELL-8 1613B Total PeCDF 30402-15-4 U

WELL-8 1613B Total HxCDD 34465-46-8 U

WELL-8 1613B 123478-HxCDF 70648-26-9 U

WELL-8 1613B 123678-HxCDF 57117-44-9 U

WELL-8 1613B 123789-HxCDF 72918-21-9 U

WELL-8 1613B 234678-HxCDF 60851-34-5 U

WELL-8 1613B Total HxCDF 55684-94-1 U

WELL-8 1613B 1234678-HpCDD 35822-46-9 U

WELL-8 1613B Total HpCDD 37871-00-4 U

WELL-8 1613B Total HpCDF 38998-75-3 U

WELL-8 1613B OCDD 3268-87-9 U

WELL-8 1613B Total PCDD TOTPCDD U

WELL-8 1613B Total PCDF TOTPCDF U

WELL-8 1613B Total PCDD/PCDF TOTPCDDDF U

Well-31 1613B 2378-TCDD 1746-01-6 U

Well-31 1613B Total TCDD 41903-57-5 U

Well-31 1613B 2378-TCDF 51207-31-9 U

Well-31 1613B Total TCDF 55722-27-5 U

Well-31 1613B 12378-PeCDD 40321-76-4 J

Well-31 1613B Total PeCDD 36088-22-9 U

Well-31 1613B 12378-PeCDF 57117-41-6 U

Well-31 1613B 23478-PeCDF 57117-31-4 J

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 25 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-31 1613B Total PeCDF 30402-15-4 U

Well-31 1613B 123678-HxCDD 57653-85-7 J

Well-31 1613B 123789-HxCDD 19408-74-3 U

Well-31 1613B Total HxCDD 34465-46-8 U

Well-31 1613B 123478-HxCDF 70648-26-9 U

Well-31 1613B 123678-HxCDF 57117-44-9 U

Well-31 1613B 123789-HxCDF 72918-21-9 J

Well-31 1613B 234678-HxCDF 60851-34-5 U

Well-31 1613B Total HxCDF 55684-94-1 U

Well-31 1613B 1234678-HpCDD 35822-46-9 U

Well-31 1613B Total HpCDD 37871-00-4 U

Well-31 1613B 1234678-HpCDF 67562-39-4 U

Well-31 1613B 1234789-HpCDF 55673-89-7 U

Well-31 1613B Total HpCDF 38998-75-3 U

Well-31 1613B OCDD 3268-87-9 J

Well-31 1613B OCDF 39001-02-0 J

Well-31 1613B Total PCDD TOTPCDD U

Well-31 1613B Total PCDF TOTPCDF U

Well-31 1613B Total PCDD/PCDF TOTPCDDDF U

Well-22 1613B Total TCDD 41903-57-5 U

Well-22 1613B Total TCDF 55722-27-5 U

Well-22 1613B Total PeCDD 36088-22-9 U

Well-22 1613B 12378-PeCDF 57117-41-6 U

Well-22 1613B 23478-PeCDF 57117-31-4 U

Well-22 1613B Total PeCDF 30402-15-4 U

Well-22 1613B 123478-HxCDD 39227-28-6 U

Well-22 1613B Total HxCDD 34465-46-8 U

Well-22 1613B 123478-HxCDF 70648-26-9 U

Well-22 1613B 123678-HxCDF 57117-44-9 U

Well-22 1613B 123789-HxCDF 72918-21-9 J

Well-22 1613B Total HxCDF 55684-94-1 U

Well-22 1613B 1234678-HpCDD 35822-46-9 J

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 26 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-22 1613B Total HpCDD 37871-00-4 U

Well-22 1613B 1234678-HpCDF 67562-39-4 U

Well-22 1613B 1234789-HpCDF 55673-89-7 U

Well-22 1613B Total HpCDF 38998-75-3 U

Well-22 1613B OCDD 3268-87-9 J

Well-22 1613B OCDF 39001-02-0 U

Well-22 1613B Total PCDD TOTPCDD U

Well-22 1613B Total PCDF TOTPCDF U

Well-22 1613B Total PCDD/PCDF TOTPCDDDF U

Well-14 1613B Total TCDD 41903-57-5 U

Well-14 1613B Total TCDF 55722-27-5 U

Well-14 1613B Total PeCDD 36088-22-9 U

Well-14 1613B 12378-PeCDF 57117-41-6 J

Well-14 1613B 23478-PeCDF 57117-31-4 U

Well-14 1613B Total PeCDF 30402-15-4 U

Well-14 1613B 123678-HxCDD 57653-85-7 U

Well-14 1613B 123789-HxCDD 19408-74-3 U

Well-14 1613B Total HxCDD 34465-46-8 U

Well-14 1613B 123478-HxCDF 70648-26-9 U

Well-14 1613B 123678-HxCDF 57117-44-9 U

Well-14 1613B 123789-HxCDF 72918-21-9 U

Well-14 1613B 234678-HxCDF 60851-34-5 U

Well-14 1613B Total HxCDF 55684-94-1 U

Well-14 1613B 1234789-HpCDF 55673-89-7 U

Well-14 1613B Total HpCDF 38998-75-3 U

Well-14 1613B OCDD 3268-87-9 U

Well-14 1613B OCDF 39001-02-0 U

Well-14 1613B Total PCDD TOTPCDD U

Well-14 1613B Total PCDF TOTPCDF U

Well-14 1613B Total PCDD/PCDF TOTPCDDDF U

Well-32 1613B Total TCDD 41903-57-5 U

Well-32 1613B Total TCDF 55722-27-5 U

Page 49: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 27 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-32 1613B Total PeCDD 36088-22-9 U

Well-32 1613B 12378-PeCDF 57117-41-6 U

Well-32 1613B 23478-PeCDF 57117-31-4 U

Well-32 1613B Total PeCDF 30402-15-4 U

Well-32 1613B Total HxCDD 34465-46-8 U

Well-32 1613B 123478-HxCDF 70648-26-9 U

Well-32 1613B 123789-HxCDF 72918-21-9 U

Well-32 1613B Total HxCDF 55684-94-1 U

Well-32 1613B 1234678-HpCDD 35822-46-9 U

Well-32 1613B Total HpCDD 37871-00-4 U

Well-32 1613B 1234678-HpCDF 67562-39-4 U

Well-32 1613B 1234789-HpCDF 55673-89-7 U

Well-32 1613B Total HpCDF 38998-75-3 U

Well-32 1613B OCDD 3268-87-9 U

Well-32 1613B OCDF 39001-02-0 U

Well-32 1613B Total PCDD TOTPCDD U

Well-32 1613B Total PCDF TOTPCDF U

Well-32 1613B Total PCDD/PCDF TOTPCDDDF U

Well-2 1613B Total TCDD 41903-57-5 U

Well-2 1613B Total TCDF 55722-27-5 U

Well-2 1613B Total PeCDD 36088-22-9 U

Well-2 1613B 12378-PeCDF 57117-41-6 J

Well-2 1613B Total PeCDF 30402-15-4 U

Well-2 1613B 123478-HxCDD 39227-28-6 U

Well-2 1613B Total HxCDD 34465-46-8 U

Well-2 1613B 123789-HxCDF 72918-21-9 U

Well-2 1613B 234678-HxCDF 60851-34-5 J

Well-2 1613B Total HxCDF 55684-94-1 U

Well-2 1613B 1234678-HpCDF 67562-39-4 U

Well-2 1613B Total HpCDF 38998-75-3 U

Well-2 1613B OCDD 3268-87-9 J

Well-2 1613B OCDF 39001-02-0 U

Page 50: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 28 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-2 1613B Total PCDD TOTPCDD U

Well-2 1613B Total PCDF TOTPCDF U

Well-2 1613B Total PCDD/PCDF TOTPCDDDF U

Well-20 1613B Total PeCDD 36088-22-9 U

Well-20 1613B 12378-PeCDF 57117-41-6 U

Well-20 1613B 23478-PeCDF 57117-31-4 U

Well-20 1613B Total PeCDF 30402-15-4 U

Well-20 1613B 123678-HxCDD 57653-85-7 U

Well-20 1613B 123789-HxCDD 19408-74-3 U

Well-20 1613B Total HxCDD 34465-46-8 U

Well-20 1613B 123478-HxCDF 70648-26-9 U

Well-20 1613B 123678-HxCDF 57117-44-9 U

Well-20 1613B 123789-HxCDF 72918-21-9 U

Well-20 1613B 234678-HxCDF 60851-34-5 U

Well-20 1613B Total HxCDF 55684-94-1 U

Well-20 1613B 1234678-HpCDD 35822-46-9 J

Well-20 1613B Total HpCDD 37871-00-4 U

Well-20 1613B 1234678-HpCDF 67562-39-4 U

Well-20 1613B Total HpCDF 38998-75-3 U

Well-20 1613B OCDD 3268-87-9 U

Well-20 1613B OCDF 39001-02-0 U

Well-20 1613B Total PCDD TOTPCDD U

Well-20 1613B Total PCDF TOTPCDF U

Well-20 1613B Total PCDD/PCDF TOTPCDDDF U

Well-15 1613B Total TCDD 41903-57-5 U

Well-15 1613B Total PeCDD 36088-22-9 U

Well-15 1613B 12378-PeCDF 57117-41-6 U

Well-15 1613B Total PeCDF 30402-15-4 U

Well-15 1613B Total HxCDD 34465-46-8 U

Well-15 1613B 123789-HxCDF 72918-21-9 U

Well-15 1613B 234678-HxCDF 60851-34-5 U

Well-15 1613B Total HxCDF 55684-94-1 U

Page 51: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 29 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-15 1613B 1234678-HpCDD 35822-46-9 J

Well-15 1613B Total HpCDD 37871-00-4 J

Well-15 1613B 1234678-HpCDF 67562-39-4 U

Well-15 1613B Total HpCDF 38998-75-3 U

Well-15 1613B OCDD 3268-87-9 J

Well-15 1613B OCDF 39001-02-0 U

Well-15 1613B Total PCDD TOTPCDD U

Well-15 1613B Total PCDF TOTPCDF U

Well-15 1613B Total PCDD/PCDF TOTPCDDDF U

Well-10 1613B Total TCDD 41903-57-5 U

Well-10 1613B Total TCDF 55722-27-5 U

Well-10 1613B 12378-PeCDD 40321-76-4 U

Well-10 1613B Total PeCDD 36088-22-9 U

Well-10 1613B 12378-PeCDF 57117-41-6 U

Well-10 1613B Total PeCDF 30402-15-4 U

Well-10 1613B Total HxCDD 34465-46-8 U

Well-10 1613B 123478-HxCDF 70648-26-9 J

Well-10 1613B 123789-HxCDF 72918-21-9 U

Well-10 1613B Total HxCDF 55684-94-1 U

Well-10 1613B 1234678-HpCDD 35822-46-9 U

Well-10 1613B Total HpCDD 37871-00-4 U

Well-10 1613B 1234678-HpCDF 67562-39-4 U

Well-10 1613B 1234789-HpCDF 55673-89-7 U

Well-10 1613B Total HpCDF 38998-75-3 U

Well-10 1613B OCDD 3268-87-9 U

Well-10 1613B OCDF 39001-02-0 U

Well-10 1613B Total PCDD TOTPCDD U

Well-10 1613B Total PCDF TOTPCDF U

Well-10 1613B Total PCDD/PCDF TOTPCDDDF U

Well-28 1613B Total TCDD 41903-57-5 U

Well-28 1613B Total TCDF 55722-27-5 U

Well-28 1613B Total PeCDD 36088-22-9 J

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 30 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-28 1613B 12378-PeCDF 57117-41-6 U

Well-28 1613B Total PeCDF 30402-15-4 U

Well-28 1613B Total HxCDD 34465-46-8 J

Well-28 1613B 123678-HxCDF 57117-44-9 U

Well-28 1613B 123789-HxCDF 72918-21-9 U

Well-28 1613B 234678-HxCDF 60851-34-5 U

Well-28 1613B Total HxCDF 55684-94-1 U

Well-28 1613B 1234678-HpCDD 35822-46-9 U

Well-28 1613B Total HpCDD 37871-00-4 U

Well-28 1613B 1234678-HpCDF 67562-39-4 U

Well-28 1613B 1234789-HpCDF 55673-89-7 U

Well-28 1613B Total HpCDF 38998-75-3 U

Well-28 1613B OCDD 3268-87-9 U

Well-28 1613B OCDF 39001-02-0 U

Well-28 1613B Total PCDD TOTPCDD U

Well-28 1613B Total PCDF TOTPCDF U

Well-28 1613B Total PCDD/PCDF TOTPCDDDF U

Well-29 1613B Total TCDD 41903-57-5 U

Well-29 1613B Total PeCDD 36088-22-9 J

Well-29 1613B 23478-PeCDF 57117-31-4 U

Well-29 1613B Total PeCDF 30402-15-4 U

Well-29 1613B Total HxCDD 34465-46-8 J

Well-29 1613B 123478-HxCDF 70648-26-9 U

Well-29 1613B 123789-HxCDF 72918-21-9 U

Well-29 1613B Total HxCDF 55684-94-1 U

Well-29 1613B 1234678-HpCDD 35822-46-9 U

Well-29 1613B Total HpCDD 37871-00-4 U

Well-29 1613B 1234678-HpCDF 67562-39-4 U

Well-29 1613B Total HpCDF 38998-75-3 U

Well-29 1613B OCDD 3268-87-9 U

Well-29 1613B OCDF 39001-02-0 U

Well-29 1613B Total PCDD TOTPCDD U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 31 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-29 1613B Total PCDF TOTPCDF U

Well-29 1613B Total PCDD/PCDF TOTPCDDDF U

Well-3 1613B Total TCDD 41903-57-5 U

Well-3 1613B Total TCDF 55722-27-5 U

Well-3 1613B Total PeCDD 36088-22-9 J

Well-3 1613B 12378-PeCDF 57117-41-6 U

Well-3 1613B Total PeCDF 30402-15-4 U

Well-3 1613B Total HxCDD 34465-46-8 J

Well-3 1613B 123678-HxCDF 57117-44-9 U

Well-3 1613B 123789-HxCDF 72918-21-9 U

Well-3 1613B Total HxCDF 55684-94-1 U

Well-3 1613B 1234678-HpCDD 35822-46-9 U

Well-3 1613B Total HpCDD 37871-00-4 U

Well-3 1613B 1234678-HpCDF 67562-39-4 U

Well-3 1613B 1234789-HpCDF 55673-89-7 U

Well-3 1613B Total HpCDF 38998-75-3 U

Well-3 1613B OCDD 3268-87-9 J

Well-3 1613B OCDF 39001-02-0 U

Well-3 1613B Total PCDD TOTPCDD U

Well-3 1613B Total PCDF TOTPCDF U

Well-3 1613B Total PCDD/PCDF TOTPCDDDF U

DUP-4 1613B Total TCDD 41903-57-5 U

DUP-4 1613B 12378-PeCDD 40321-76-4 U

DUP-4 1613B Total PeCDD 36088-22-9 U

DUP-4 1613B 12378-PeCDF 57117-41-6 U

DUP-4 1613B 23478-PeCDF 57117-31-4 U

DUP-4 1613B Total PeCDF 30402-15-4 U

DUP-4 1613B Total HxCDD 34465-46-8 J

DUP-4 1613B 123478-HxCDF 70648-26-9 U

DUP-4 1613B 123789-HxCDF 72918-21-9 U

DUP-4 1613B 234678-HxCDF 60851-34-5 U

DUP-4 1613B Total HxCDF 55684-94-1 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 32 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

DUP-4 1613B 1234678-HpCDD 35822-46-9 U

DUP-4 1613B Total HpCDD 37871-00-4 J

DUP-4 1613B 1234678-HpCDF 67562-39-4 U

DUP-4 1613B 1234789-HpCDF 55673-89-7 U

DUP-4 1613B Total HpCDF 38998-75-3 U

DUP-4 1613B OCDD 3268-87-9 J

DUP-4 1613B OCDF 39001-02-0 U

DUP-4 1613B Total PCDD TOTPCDD U

DUP-4 1613B Total PCDF TOTPCDF U

DUP-4 1613B Total PCDD/PCDF TOTPCDDDF U

Well-27 1613B 12378-PeCDD 40321-76-4 U

Well-27 1613B Total PeCDD 36088-22-9 U

Well-27 1613B 12378-PeCDF 57117-41-6 U

Well-27 1613B Total PeCDF 30402-15-4 U

Well-27 1613B 123478-HxCDD 39227-28-6 J

Well-27 1613B 123678-HxCDD 57653-85-7 J

Well-27 1613B Total HxCDD 34465-46-8 J

Well-27 1613B 123478-HxCDF 70648-26-9 U

Well-27 1613B 123789-HxCDF 72918-21-9 U

Well-27 1613B 234678-HxCDF 60851-34-5 J

Well-27 1613B Total HxCDF 55684-94-1 U

Well-27 1613B 1234678-HpCDD 35822-46-9 J

Well-27 1613B Total HpCDD 37871-00-4 J

Well-27 1613B OCDD 3268-87-9 J

Well-27 1613B OCDF 39001-02-0 J

Well-27 1613B Total PCDD TOTPCDD U

Well-27 1613B Total PCDF TOTPCDF U

Well-27 1613B Total PCDD/PCDF TOTPCDDDF U

Well-11 1613B Total TCDD 41903-57-5 U

Well-11 1613B Total PeCDD 36088-22-9 J

Well-11 1613B Total PeCDF 30402-15-4 U

Well-11 1613B 123789-HxCDD 19408-74-3 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 33 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-11 1613B Total HxCDD 34465-46-8 U

Well-11 1613B 123478-HxCDF 70648-26-9 U

Well-11 1613B 123789-HxCDF 72918-21-9 U

Well-11 1613B Total HxCDF 55684-94-1 U

Well-11 1613B Total HpCDF 38998-75-3 J

Well-11 1613B OCDD 3268-87-9 U

Well-11 1613B OCDF 39001-02-0 U

Well-11 1613B Total PCDD TOTPCDD U

Well-11 1613B Total PCDF TOTPCDF U

Well-11 1613B Total PCDD/PCDF TOTPCDDDF U

Well-43 1613B Total TCDD 41903-57-5 U

Well-43 1613B Total TCDF 55722-27-5 U

Well-43 1613B Total PeCDD 36088-22-9 J

Well-43 1613B 12378-PeCDF 57117-41-6 U

Well-43 1613B 23478-PeCDF 57117-31-4 J

Well-43 1613B Total PeCDF 30402-15-4 J

Well-43 1613B 123478-HxCDD 39227-28-6 J

Well-43 1613B 123678-HxCDD 57653-85-7 J

Well-43 1613B 123789-HxCDD 19408-74-3 U

Well-43 1613B Total HxCDD 34465-46-8 J

Well-43 1613B 123478-HxCDF 70648-26-9 U

Well-43 1613B 123678-HxCDF 57117-44-9 J

Well-43 1613B 123789-HxCDF 72918-21-9 J

Well-43 1613B 234678-HxCDF 60851-34-5 J

Well-43 1613B Total HxCDF 55684-94-1 J

Well-43 1613B 1234678-HpCDD 35822-46-9 J

Well-43 1613B Total HpCDD 37871-00-4 J

Well-43 1613B 1234678-HpCDF 67562-39-4 J

Well-43 1613B 1234789-HpCDF 55673-89-7 J

Well-43 1613B Total HpCDF 38998-75-3 J

Well-43 1613B OCDD 3268-87-9 J

Well-43 1613B OCDF 39001-02-0 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 34 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-43 1613B Total PCDD TOTPCDD U

Well-43 1613B Total PCDF TOTPCDF U

Well-43 1613B Total PCDD/PCDF TOTPCDDDF U

Well-41 1613B Total TCDD 41903-57-5 U

Well-41 1613B Total TCDF 55722-27-5 U

Well-41 1613B 12378-PeCDD 40321-76-4 U

Well-41 1613B Total PeCDD 36088-22-9 J

Well-41 1613B 23478-PeCDF 57117-31-4 U

Well-41 1613B Total PeCDF 30402-15-4 U

Well-41 1613B 123478-HxCDD 39227-28-6 U

Well-41 1613B 123678-HxCDD 57653-85-7 U

Well-41 1613B 123789-HxCDD 19408-74-3 U

Well-41 1613B Total HxCDD 34465-46-8 J

Well-41 1613B 123478-HxCDF 70648-26-9 U

Well-41 1613B 123678-HxCDF 57117-44-9 J

Well-41 1613B 123789-HxCDF 72918-21-9 U

Well-41 1613B 234678-HxCDF 60851-34-5 J

Well-41 1613B Total HxCDF 55684-94-1 U

Well-41 1613B 1234678-HpCDD 35822-46-9 U

Well-41 1613B Total HpCDD 37871-00-4 U

Well-41 1613B 1234678-HpCDF 67562-39-4 U

Well-41 1613B 1234789-HpCDF 55673-89-7 J

Well-41 1613B Total HpCDF 38998-75-3 U

Well-41 1613B OCDD 3268-87-9 J

Well-41 1613B OCDF 39001-02-0 U

Well-41 1613B Total PCDD TOTPCDD U

Well-41 1613B Total PCDF TOTPCDF U

Well-41 1613B Total PCDD/PCDF TOTPCDDDF U

Well-16 1613B Total TCDD 41903-57-5 J

Well-16 1613B 2378-TCDF 51207-31-9 U

Well-16 1613B Total TCDF 55722-27-5 U

Well-16 1613B 12378-PeCDD 40321-76-4 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 35 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

Well-16 1613B Total PeCDD 36088-22-9 J

Well-16 1613B 12378-PeCDF 57117-41-6 U

Well-16 1613B 23478-PeCDF 57117-31-4 J

Well-16 1613B Total PeCDF 30402-15-4 J

Well-16 1613B 123478-HxCDD 39227-28-6 J

Well-16 1613B 123678-HxCDD 57653-85-7 J

Well-16 1613B Total HxCDD 34465-46-8 J

Well-16 1613B 123678-HxCDF 57117-44-9 J

Well-16 1613B 123789-HxCDF 72918-21-9 J

Well-16 1613B 234678-HxCDF 60851-34-5 J

Well-16 1613B Total HxCDF 55684-94-1 J

Well-16 1613B 1234678-HpCDD 35822-46-9 J

Well-16 1613B Total HpCDD 37871-00-4 J

Well-16 1613B 1234678-HpCDF 67562-39-4 J

Well-16 1613B 1234789-HpCDF 55673-89-7 J

Well-16 1613B Total HpCDF 38998-75-3 J

Well-16 1613B OCDD 3268-87-9 J

Well-16 1613B OCDF 39001-02-0 J

Well-16 1613B Total PCDD TOTPCDD U

Well-16 1613B Total PCDF TOTPCDF U

Well-16 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-34 1613B Total TCDD 41903-57-5 U

WELL-34 1613B 2378-TCDF 51207-31-9 U

WELL-34 1613B Total TCDF 55722-27-5 U

WELL-34 1613B 12378-PeCDD 40321-76-4 U

WELL-34 1613B Total PeCDD 36088-22-9 U

WELL-34 1613B 12378-PeCDF 57117-41-6 U

WELL-34 1613B 23478-PeCDF 57117-31-4 U

WELL-34 1613B Total PeCDF 30402-15-4 U

WELL-34 1613B 123478-HxCDD 39227-28-6 U

WELL-34 1613B 123678-HxCDD 57653-85-7 U

WELL-34 1613B 123789-HxCDD 19408-74-3 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 36 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-34 1613B Total HxCDD 34465-46-8 U

WELL-34 1613B 123478-HxCDF 70648-26-9 U

WELL-34 1613B 123678-HxCDF 57117-44-9 U

WELL-34 1613B 123789-HxCDF 72918-21-9 U

WELL-34 1613B 234678-HxCDF 60851-34-5 U

WELL-34 1613B Total HxCDF 55684-94-1 U

WELL-34 1613B 1234678-HpCDD 35822-46-9 U

WELL-34 1613B Total HpCDD 37871-00-4 U

WELL-34 1613B 1234678-HpCDF 67562-39-4 U

WELL-34 1613B 1234789-HpCDF 55673-89-7 U

WELL-34 1613B Total HpCDF 38998-75-3 U

WELL-34 1613B OCDD 3268-87-9 J

WELL-34 1613B OCDF 39001-02-0 J

WELL-34 1613B Total PCDD TOTPCDD U

WELL-34 1613B Total PCDF TOTPCDF U

WELL-34 1613B Total PCDD/PCDF TOTPCDDDF U

DUP-5 1613B 2378-TCDD 1746-01-6 U

DUP-5 1613B Total TCDD 41903-57-5 U

DUP-5 1613B 2378-TCDF 51207-31-9 U

DUP-5 1613B Total TCDF 55722-27-5 U

DUP-5 1613B 12378-PeCDD 40321-76-4 U

DUP-5 1613B Total PeCDD 36088-22-9 U

DUP-5 1613B 12378-PeCDF 57117-41-6 U

DUP-5 1613B 23478-PeCDF 57117-31-4 U

DUP-5 1613B Total PeCDF 30402-15-4 U

DUP-5 1613B 123478-HxCDD 39227-28-6 U

DUP-5 1613B 123678-HxCDD 57653-85-7 U

DUP-5 1613B 123789-HxCDD 19408-74-3 U

DUP-5 1613B Total HxCDD 34465-46-8 U

DUP-5 1613B 123478-HxCDF 70648-26-9 U

DUP-5 1613B 123678-HxCDF 57117-44-9 U

DUP-5 1613B 123789-HxCDF 72918-21-9 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 37 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

DUP-5 1613B 234678-HxCDF 60851-34-5 U

DUP-5 1613B Total HxCDF 55684-94-1 U

DUP-5 1613B 1234678-HpCDD 35822-46-9 J

DUP-5 1613B Total HpCDD 37871-00-4 U

DUP-5 1613B 1234678-HpCDF 67562-39-4 U

DUP-5 1613B 1234789-HpCDF 55673-89-7 U

DUP-5 1613B Total HpCDF 38998-75-3 U

DUP-5 1613B OCDD 3268-87-9 J

DUP-5 1613B OCDF 39001-02-0 U

DUP-5 1613B Total PCDD TOTPCDD U

DUP-5 1613B Total PCDF TOTPCDF U

DUP-5 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-38 1613B 2378-TCDD 1746-01-6 U

WELL-38 1613B Total TCDD 41903-57-5 U

WELL-38 1613B 2378-TCDF 51207-31-9 U

WELL-38 1613B Total TCDF 55722-27-5 U

WELL-38 1613B 12378-PeCDD 40321-76-4 J

WELL-38 1613B Total PeCDD 36088-22-9 U

WELL-38 1613B 12378-PeCDF 57117-41-6 U

WELL-38 1613B 23478-PeCDF 57117-31-4 U

WELL-38 1613B Total PeCDF 30402-15-4 U

WELL-38 1613B 123478-HxCDD 39227-28-6 U

WELL-38 1613B 123678-HxCDD 57653-85-7 U

WELL-38 1613B 123789-HxCDD 19408-74-3 U

WELL-38 1613B Total HxCDD 34465-46-8 U

WELL-38 1613B 123478-HxCDF 70648-26-9 U

WELL-38 1613B 123678-HxCDF 57117-44-9 U

WELL-38 1613B 123789-HxCDF 72918-21-9 J

WELL-38 1613B 234678-HxCDF 60851-34-5 U

WELL-38 1613B Total HxCDF 55684-94-1 U

WELL-38 1613B 1234678-HpCDD 35822-46-9 U

WELL-38 1613B Total HpCDD 37871-00-4 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 38 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-38 1613B 1234678-HpCDF 67562-39-4 U

WELL-38 1613B 1234789-HpCDF 55673-89-7 U

WELL-38 1613B Total HpCDF 38998-75-3 U

WELL-38 1613B OCDD 3268-87-9 J

WELL-38 1613B OCDF 39001-02-0 U

WELL-38 1613B Total PCDD TOTPCDD U

WELL-38 1613B Total PCDF TOTPCDF U

WELL-38 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-47 1613B 2378-TCDD 1746-01-6 U

WELL-47 1613B Total TCDD 41903-57-5 U

WELL-47 1613B 2378-TCDF 51207-31-9 U

WELL-47 1613B Total TCDF 55722-27-5 U

WELL-47 1613B 12378-PeCDD 40321-76-4 U

WELL-47 1613B Total PeCDD 36088-22-9 U

WELL-47 1613B 12378-PeCDF 57117-41-6 U

WELL-47 1613B 23478-PeCDF 57117-31-4 U

WELL-47 1613B Total PeCDF 30402-15-4 U

WELL-47 1613B 123478-HxCDD 39227-28-6 U

WELL-47 1613B 123678-HxCDD 57653-85-7 U

WELL-47 1613B 123789-HxCDD 19408-74-3 U

WELL-47 1613B Total HxCDD 34465-46-8 U

WELL-47 1613B 123478-HxCDF 70648-26-9 U

WELL-47 1613B 123678-HxCDF 57117-44-9 U

WELL-47 1613B 123789-HxCDF 72918-21-9 U

WELL-47 1613B 234678-HxCDF 60851-34-5 U

WELL-47 1613B Total HxCDF 55684-94-1 U

WELL-47 1613B 1234678-HpCDD 35822-46-9 U

WELL-47 1613B Total HpCDD 37871-00-4 U

WELL-47 1613B 1234678-HpCDF 67562-39-4 U

WELL-47 1613B 1234789-HpCDF 55673-89-7 U

WELL-47 1613B Total HpCDF 38998-75-3 U

WELL-47 1613B OCDD 3268-87-9 U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 39 of 42

Client Sample ID Analysis Analyte CAS # Validator

Qualifier

WELL-47 1613B OCDF 39001-02-0 U

WELL-47 1613B Total PCDD TOTPCDD U

WELL-47 1613B Total PCDF TOTPCDF U

WELL-47 1613B Total PCDD/PCDF TOTPCDDDF U

WELL-9 1613B Total TCDD 41903-57-5 U

WELL-9 1613B 2378-TCDF 51207-31-9 U

WELL-9 1613B Total TCDF 55722-27-5 U

WELL-9 1613B Total PeCDD 36088-22-9 U

WELL-9 1613B 12378-PeCDF 57117-41-6 U

WELL-9 1613B 23478-PeCDF 57117-31-4 U

WELL-9 1613B Total PeCDF 30402-15-4 U

WELL-9 1613B 123478-HxCDD 39227-28-6 U

WELL-9 1613B 123678-HxCDD 57653-85-7 U

WELL-9 1613B 123789-HxCDD 19408-74-3 U

WELL-9 1613B Total HxCDD 34465-46-8 U

WELL-9 1613B 123478-HxCDF 70648-26-9 U

WELL-9 1613B 123678-HxCDF 57117-44-9 U

WELL-9 1613B 123789-HxCDF 72918-21-9 U

WELL-9 1613B 234678-HxCDF 60851-34-5 U

WELL-9 1613B Total HxCDF 55684-94-1 U

WELL-9 1613B 1234678-HpCDD 35822-46-9 U

WELL-9 1613B Total HpCDD 37871-00-4 U

WELL-9 1613B 1234678-HpCDF 67562-39-4 U

WELL-9 1613B 1234789-HpCDF 55673-89-7 U

WELL-9 1613B Total HpCDF 38998-75-3 U

WELL-9 1613B OCDD 3268-87-9 U

WELL-9 1613B OCDF 39001-02-0 U

WELL-9 1613B Total PCDD TOTPCDD U

WELL-9 1613B Total PCDF TOTPCDF U

WELL-9 1613B Total PCDD/PCDF TOTPCDDDF U

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 40 of 42

MAJOR DEFICIENCIES:

Major deficiencies include those that grossly impact data quality and necessitate the rejection

of results. No major deficiencies that were identified.

MINOR DEFICIENCIES:

Minor deficiencies include anomalies that directly impact data quality and necessitate

qualification, but do not result in unusable data. The section below describes the minor

deficiencies that were identified.

Dioxins/Furans by USEPA Method 1613B:

The laboratory assigned “Q” qualifiers to dioxin and furan results when a peak was detected

but did not meet the ion ratio criteria. Given that the ion abundance ratio is the primary

identification criteria for HRMS, these values are not considered positive identifications, but are

“estimated maximum possible concentrations.” All “Q” qualified results were qualified as non-

detect at the reported sample concentration.

For SDG LEG01, one cooler was received at a temperature of 6.1°C, which is greater than the

thermal preservation requirement of 4°C±2°C. The associated investigative sample results for

Well-40 and Well-24 are qualified as estimated.

The method blank associated with batch number 17174011 (LEG01) displayed positive

detections above the EDL but below the MRL for all analytes except Total PCDD, Total PCDF,

and Total PCDD/PCDF. The associated positive samples results are qualified as non-detected at

the sample concentration.

The method blank associated with batch number 17173005 (LEG02 and LEG05) displayed

positive detections above the EDL but below the MRL for all analytes except 1,2,3,7,8-PeCDD,

1,2,37,8,9-HxCDD, 2,3,7,8-TCDF, 1,2,3,7,8-PeCDF and 1,2,3,4,7,8-HxCDF. The associated

positive samples results are qualified as non-detected at the sample concentration.

The method blank associated with batch number 17174005 (LEG02) displayed positive

detections above the EDL but below the MRL for all analytes except 2,3,7,8-TCDD, 1,2,3,4,7,8-

HxCDD, 2,3,7,8-TCDF and 2,3,4,7,8-PeCDF. The associated positive samples results are

qualified as non-detected at the sample concentration.

The method blank associated with batch number 17174005 (LEG03) displayed positive

detections above the EDL but below the MRL for all analytes except Total PCDD, Total PCDF,

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 41 of 42

and Total PCDD/PCDF. The associated positive samples results are qualified as non-detected at

the sample concentration.

The method blank associated with batch number 17173003 (LEG04) displayed positive

detections above the EDL but below the MRL for all analytes except 2,3,7,8-TCDD, 1,2,3,4,7,8-

HxCDD, Total PCDD, Total PCDF, and Total PCDD/PCDF. The associated positive samples

results are qualified as non-detected at the sample concentration.

The method blank associated with batch number 17175001 (LEG06) displayed positive

detections above the EDL but below the MRL for all analytes except Total PCDD, Total PCDF,

and Total PCDD/PCDF. The associated positive samples results are qualified as non-detected at

the sample concentration.

OTHER DEFICIENCIES:

Other deficiencies include anomalies that do not directly impact data quality and do not

necessitate qualification. The section below describes the other deficiencies that were

identified.

Dioxins/Furans by USEPA Method 1613B:

For SDG LEG04 and LEG05, one cooler was received at a temperature of 10.4°C, which is

greater than the thermal preservation requirement of 4°C±2°C. The cooler temperature was

checked in all corners of the cooler and well as the center, and was found to be within

temperature compliance. On the basis of professional judgment, qualification is not necessary.

Isomer specificity cannot be achieved on the DB-5 column for 2,3,7,8-TCDF; the results must

have a confirmatory analysis on a DB-225 or SP-2330 column. No confirmatory analysis was

performed for 2,3,7,8-TCDF results; however, none of the results were reported at or above the

MRL. The data was considered acceptable.

COMMENTS:

Five field duplicate and parent samples were collected during the event. For results less than

5X the MRL, analytes meet the precision criteria if the absolute difference is less than ±1X the

MRL. For results greater than 5X the MRL, analytes meet the precision criteria if the RPD is

less than or equal to 30%. The following analytes did not meet the precision criteria:

DUP-1 and Well-39: (none)

DUP-2 and Well-12: (none)

DUP-3 and Well-33: (none)

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Technical

Memorandum

Data Usability Summary

For HCPCS Residential Well Sampling

June 2017 Sampling Event

Langan Project No.: 510026201

July 17, 2017 Page 42 of 42

DUP-4 and Well-27: (none)

DUP-5 and Well-38: (none)

On the basis of this evaluation, the laboratory appears to have followed the specified analytical

methods with the exception of errors discussed above. If a given fraction is not mentioned

above, that means that all specified criteria were met for that parameter. All of the sample hold

times were met and the data packages met RG-366/TRPP-13 requirements.

All data are considered usable, as qualified. In addition, completeness, defined as the

percentage of analytical results that are judged to be valid, is 100%.

Signed:

Emily Strake, CEP

Senior Project Chemist/Risk Assessor

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Air & EmissionsMatrix:

Method

Analyte

EPA TO-14AAB Analyte ID Method ID

1,1,1-Trichloroethane LA-DEQ 5160 10248609

1,1,2,2-Tetrachloroethane LA-DEQ 5110 10248609

1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113) LA-DEQ 5195 10248609

1,1,2-Trichloroethane LA-DEQ 5165 10248609

1,1-Dichloroethane LA-DEQ 4630 10248609

1,1-Dichloroethylene LA-DEQ 4640 10248609

1,2,4-Trichlorobenzene LA-DEQ 5155 10248609

1,2,4-Trimethylbenzene LA-DEQ 5210 10248609

1,2-Dibromoethane (EDB, Ethylene dibromide) LA-DEQ 4585 10248609

1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) LA-DEQ 4695 10248609

1,2-Dichlorobenzene LA-DEQ 4610 10248609

1,2-Dichloroethane (Ethylene dichloride) LA-DEQ 4635 10248609

1,2-Dichloropropane LA-DEQ 4655 10248609

1,3,5-Trimethylbenzene LA-DEQ 5215 10248609

1,3-Dichlorobenzene LA-DEQ 4615 10248609

1,4-Dichlorobenzene LA-DEQ 4620 10248609

Benzene LA-DEQ 4375 10248609

Carbon tetrachloride LA-DEQ 4455 10248609

Chlorobenzene LA-DEQ 4475 10248609

Chloroethane (Ethyl chloride) LA-DEQ 4485 10248609

Chloroform LA-DEQ 4505 10248609

cis-1,2-Dichloroethylene LA-DEQ 4645 10248609

cis-1,3-Dichloropropene LA-DEQ 4680 10248609

Dichlorodifluoromethane (Freon-12) LA-DEQ 4625 10248609

Ethylbenzene LA-DEQ 4765 10248609

Hexachlorobutadiene LA-DEQ 4835 10248609

Methyl bromide (Bromomethane) LA-DEQ 4950 10248609

Methyl chloride (Chloromethane) LA-DEQ 4960 10248609

Page 1 of 62

Page 66: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Air & EmissionsMatrix:

Methylene chloride (Dichloromethane) LA-DEQ 4975 10248609

Styrene LA-DEQ 5100 10248609

Tetrachloroethylene (Perchloroethylene) LA-DEQ 5115 10248609

Toluene LA-DEQ 5140 10248609

trans-1,2-Dichloroethylene LA-DEQ 4700 10248609

trans-1,3-Dichloropropylene LA-DEQ 4685 10248609

Trichloroethene (Trichloroethylene) LA-DEQ 5170 10248609

Trichlorofluoromethane (Fluorotrichloromethane, Freon 11) LA-DEQ 5175 10248609

Vinyl chloride LA-DEQ 5235 10248609

Xylene (total) LA-DEQ 5260 10248609

Method

Analyte

EPA TO-15AB Analyte ID Method ID

1,1,1-Trichloroethane LA-DEQ 5160 10248803

1,1,2,2-Tetrachloroethane LA-DEQ 5110 10248803

1,1,2-Trichloroethane LA-DEQ 5165 10248803

1,1-Dichloroethane LA-DEQ 4630 10248803

1,1-Dichloroethylene LA-DEQ 4640 10248803

1,2,4-Trichlorobenzene LA-DEQ 5155 10248803

1,2,4-Trimethylbenzene LA-DEQ 5210 10248803

1,2-Dibromoethane (EDB, Ethylene dibromide) LA-DEQ 4585 10248803

1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) LA-DEQ 4695 10248803

1,2-Dichlorobenzene LA-DEQ 4610 10248803

1,2-Dichloroethane (Ethylene dichloride) LA-DEQ 4635 10248803

1,2-Dichloropropane LA-DEQ 4655 10248803

1,3,5-Trimethylbenzene LA-DEQ 5215 10248803

1,3-Butadiene LA-DEQ 9318 10248803

1,3-Dichlorobenzene LA-DEQ 4615 10248803

1,4-Dichlorobenzene LA-DEQ 4620 10248803

1,4-Dioxane (1,4-Diethyleneoxide) LA-DEQ 4735 10248803

1-Propene (Propylene) LA-DEQ 4836 10248803

Page 2 of 62

Page 67: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Air & EmissionsMatrix:

2,2,4-Trimethylpentane (Isooctane) LA-DEQ 5220 10248803

2-Butanone (Methyl ethyl ketone, MEK) LA-DEQ 4410 10248803

Acetonitrile LA-DEQ 4320 10248803

Acrylonitrile LA-DEQ 4340 10248803

Benzene LA-DEQ 4375 10248803

Bromodichloromethane LA-DEQ 4395 10248803

Bromoform LA-DEQ 4400 10248803

Carbon tetrachloride LA-DEQ 4455 10248803

Chlorobenzene LA-DEQ 4475 10248803

Chlorodibromomethane LA-DEQ 4575 10248803

Chloroethane (Ethyl chloride) LA-DEQ 4485 10248803

Chloroform LA-DEQ 4505 10248803

cis-1,2-Dichloroethylene LA-DEQ 4645 10248803

cis-1,3-Dichloropropene LA-DEQ 4680 10248803

Cyclohexane LA-DEQ 4555 10248803

Dichlorodifluoromethane (Freon-12) LA-DEQ 4625 10248803

Ethyl acrylate LA-DEQ 4760 10248803

Ethylbenzene LA-DEQ 4765 10248803

Hexachlorobutadiene LA-DEQ 4835 10248803

Isopropylbenzene (Cumene) LA-DEQ 4900 10248803

m+p-xylene LA-DEQ 5240 10248803

Methyl bromide (Bromomethane) LA-DEQ 4950 10248803

Methyl chloride (Chloromethane) LA-DEQ 4960 10248803

Methyl isobutyl ketone (Hexone) (MIBK) LA-DEQ 4985 10248803

Methyl methacrylate LA-DEQ 4990 10248803

Methyl tert-butyl ether (MTBE) LA-DEQ 5000 10248803

Methylene chloride (Dichloromethane) LA-DEQ 4975 10248803

n-Heptane LA-DEQ 4825 10248803

n-Hexane LA-DEQ 4850 10248803

o-Xylene LA-DEQ 5250 10248803

Page 3 of 62

Page 68: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Air & EmissionsMatrix:

p-Ethyltoluene LA-DEQ 10255 10248803

Styrene LA-DEQ 5100 10248803

Tetrachloroethylene (Perchloroethylene) LA-DEQ 5115 10248803

Toluene LA-DEQ 5140 10248803

trans-1,2-Dichloroethylene LA-DEQ 4700 10248803

trans-1,3-Dichloropropylene LA-DEQ 4685 10248803

Trichloroethene (Trichloroethylene) LA-DEQ 5170 10248803

Trichlorofluoromethane (Fluorotrichloromethane, Freon 11) LA-DEQ 5175 10248803

Vinyl acetate LA-DEQ 5225 10248803

Vinyl chloride LA-DEQ 5235 10248803

Xylene (total) LA-DEQ 5260 10248803

Page 4 of 62

Page 69: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Biological TissuesMatrix:

Method

Analyte

EPA 6010AB Analyte ID Method ID

Aluminum LA-DEQ 1000 10155803

Antimony LA-DEQ 1005 10155803

Arsenic LA-DEQ 1010 10155803

Barium LA-DEQ 1015 10155803

Beryllium LA-DEQ 1020 10155803

Boron LA-DEQ 1025 10155803

Cadmium LA-DEQ 1030 10155803

Calcium LA-DEQ 1035 10155803

Chromium LA-DEQ 1040 10155803

Cobalt LA-DEQ 1050 10155803

Copper LA-DEQ 1055 10155803

Iron LA-DEQ 1070 10155803

Lead LA-DEQ 1075 10155803

Magnesium LA-DEQ 1085 10155803

Manganese LA-DEQ 1090 10155803

Molybdenum LA-DEQ 1100 10155803

Nickel LA-DEQ 1105 10155803

Potassium LA-DEQ 1125 10155803

Selenium LA-DEQ 1140 10155803

Silver LA-DEQ 1150 10155803

Sodium LA-DEQ 1155 10155803

Strontium LA-DEQ 1160 10155803

Thallium LA-DEQ 1165 10155803

Tin LA-DEQ 1175 10155803

Titanium LA-DEQ 1180 10155803

Vanadium LA-DEQ 1185 10155803

Zinc LA-DEQ 1190 10155803

Method

Analyte

EPA 6020AB Analyte ID Method ID

Page 5 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Biological TissuesMatrix:

Antimony LA-DEQ 1005 10156204

Arsenic LA-DEQ 1010 10156204

Beryllium LA-DEQ 1020 10156204

Cadmium LA-DEQ 1030 10156204

Chromium LA-DEQ 1040 10156204

Copper LA-DEQ 1055 10156204

Lead LA-DEQ 1075 10156204

Nickel LA-DEQ 1105 10156204

Selenium LA-DEQ 1140 10156204

Thallium LA-DEQ 1165 10156204

Method

Analyte

EPA 7471AB Analyte ID Method ID

Mercury LA-DEQ 1095 10166208

Method

Analyte

EPA 8081AB Analyte ID Method ID

4,4'-DDD LA-DEQ 7355 10178606

4,4'-DDE LA-DEQ 7360 10178606

4,4'-DDT LA-DEQ 7365 10178606

Aldrin LA-DEQ 7025 10178606

alpha-BHC (alpha-Hexachlorocyclohexane) LA-DEQ 7110 10178606

beta-BHC (beta-Hexachlorocyclohexane) LA-DEQ 7115 10178606

Chlordane (tech.) LA-DEQ 7250 10178606

delta-BHC (delta-Hexachlorocyclohexane) LA-DEQ 7105 10178606

Dieldrin LA-DEQ 7470 10178606

gamma-BHC (Lindane, gamma-Hexachlorocyclohexane) LA-DEQ 7120 10178606

Heptachlor LA-DEQ 7685 10178606

Heptachlor epoxide LA-DEQ 7690 10178606

Mirex LA-DEQ 7870 10178606

Toxaphene (Chlorinated camphene) LA-DEQ 8250 10178606

Method

Analyte

EPA 8082AB Analyte ID Method ID

Page 6 of 62

Page 71: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Biological TissuesMatrix:

Aroclor-1016 (PCB-1016) LA-DEQ 8880 10179007

Aroclor-1221 (PCB-1221) LA-DEQ 8885 10179007

Aroclor-1232 (PCB-1232) LA-DEQ 8890 10179007

Aroclor-1242 (PCB-1242) LA-DEQ 8895 10179007

Aroclor-1248 (PCB-1248) LA-DEQ 8900 10179007

Aroclor-1254 (PCB-1254) LA-DEQ 8905 10179007

Aroclor-1260 (PCB-1260) LA-DEQ 8910 10179007

Method

Analyte

EPA 8270AB Analyte ID Method ID

1,2,4,5-Tetrachlorobenzene LA-DEQ 6715 10186002

2-Methylphenol (o-Cresol) LA-DEQ 6400 10186002

3-Methylphenol (m-Cresol) LA-DEQ 6405 10186002

4-Methylphenol (p-Cresol) LA-DEQ 6410 10186002

Benzidine LA-DEQ 5595 10186002

Benzo(a)anthracene LA-DEQ 5575 10186002

Benzo(a)pyrene LA-DEQ 5580 10186002

Chrysene LA-DEQ 5855 10186002

Hexachlorobenzene LA-DEQ 6275 10186002

Hexachlorobutadiene LA-DEQ 4835 10186002

Hexachlorocyclopentadiene LA-DEQ 6285 10186002

Hexachloroethane LA-DEQ 4840 10186002

Hexachlorophene LA-DEQ 6290 10186002

n-Nitrosodiethylamine LA-DEQ 6525 10186002

n-Nitrosodi-n-butylamine LA-DEQ 5025 10186002

Pentachlorobenzene LA-DEQ 6590 10186002

Pentachlorophenol LA-DEQ 6605 10186002

Pyridine LA-DEQ 5095 10186002

Page 7 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Drinking WaterMatrix:

Method

Analyte

EPA 1613AB Analyte ID Method ID

2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) PA 9618 10120204

Method

Analyte

EPA 200.7AB Analyte ID Method ID

Aluminum PA 1000 10013806

Barium PA 1015 10013806

Beryllium PA 1020 10013806

Cadmium PA 1030 10013806

Chromium PA 1040 10013806

Cobalt PA 1050 10013806

Copper PA 1055 10013806

Iron PA 1070 10013806

Lithium PA 1080 10013806

Magnesium PA 1085 10013806

Manganese PA 1090 10013806

Nickel PA 1105 10013806

Potassium PA 1125 10013806

Silver PA 1150 10013806

Sodium PA 1155 10013806

Strontium PA 1160 10013806

Tin PA 1175 10013806

Vanadium PA 1185 10013806

Zinc PA 1190 10013806

Method

Analyte

EPA 200.8AB Analyte ID Method ID

Antimony PA 1005 10014605

Arsenic PA 1010 10014605

Barium PA 1015 10014605

Beryllium PA 1020 10014605

Cadmium PA 1030 10014605

Page 8 of 62

Page 73: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Drinking WaterMatrix:

Chromium PA 1040 10014605

Copper PA 1055 10014605

Lead PA 1075 10014605

Manganese PA 1090 10014605

Nickel PA 1105 10014605

Selenium PA 1140 10014605

Thallium PA 1165 10014605

Zinc PA 1190 10014605

Method

Analyte

EPA 245.1AB Analyte ID Method ID

Mercury PA 1095 10036609

Method

Analyte

EPA 300.0AB Analyte ID Method ID

Bromide PA 1540 10053006

Chloride PA 1575 10053006

Fluoride PA 1730 10053006

Nitrate as N PA 1810 10053006

Nitrite as N PA 1840 10053006

Sulfate PA 2000 10053006

Method

Analyte

EPA 335.4AB Analyte ID Method ID

Total Cyanide PA 1635 10061402

Method

Analyte

EPA 353.2AB Analyte ID Method ID

Nitrate as N PA 1810 10067604

Nitrite as N PA 1840 10067604

Method

Analyte

EPA 504.1AB Analyte ID Method ID

1,2-Dibromo-3-chloropropane (DBCP) PA 4570 10082801

1,2-Dibromoethane (EDB, Ethylene dibromide) PA 4585 10082801

Page 9 of 62

Page 74: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Drinking WaterMatrix:

Method

Analyte

EPA 524.2AB Analyte ID Method ID

1,1,1-Trichloroethane PA 5160 10089006

1,1,2-Trichloroethane PA 5165 10089006

1,1-Dichloroethylene PA 4640 10089006

1,2,4-Trichlorobenzene PA 5155 10089006

1,2-Dichlorobenzene PA 4610 10089006

1,2-Dichloroethane (Ethylene dichloride) PA 4635 10089006

1,2-Dichloropropane PA 4655 10089006

1,4-Dichlorobenzene PA 4620 10089006

Benzene PA 4375 10089006

Carbon tetrachloride PA 4455 10089006

Chlorobenzene PA 4475 10089006

cis-1,2-Dichloroethylene PA 4645 10089006

Ethylbenzene PA 4765 10089006

Methylene chloride (Dichloromethane) PA 4975 10089006

Styrene PA 5100 10089006

Tetrachloroethylene (Perchloroethylene) PA 5115 10089006

Toluene PA 5140 10089006

Total trihalomethanes PA 5205 10089006

trans-1,2-Dichloroethylene PA 4700 10089006

Trichloroethene (Trichloroethylene) PA 5170 10089006

Vinyl chloride PA 5235 10089006

Xylene (total) PA 5260 10089006

Method

Analyte

EPA 525.2AB Analyte ID Method ID

Alachlor PA 7005 10090003

Atrazine PA 7065 10090003

Benzo(a)pyrene PA 5580 10090003

bis(2-Ethylhexyl) adipate (Di(2-Ethylhexyl) adipate, DEHA) PA 6062 10090003

bis(2-Ethylhexyl) phthalate (Di(2-Ethylhexyl) phthalate, DEHP) PA 6065 10090003Page 10 of 62

Page 75: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Drinking WaterMatrix:

Endrin PA 7540 10090003

gamma-BHC (Lindane, gamma-Hexachlorocyclohexane) PA 7120 10090003

Heptachlor PA 7685 10090003

Heptachlor epoxide PA 7690 10090003

Hexachlorobenzene PA 6275 10090003

Hexachlorocyclopentadiene PA 6285 10090003

Methoxychlor PA 7810 10090003

Simazine PA 8125 10090003

Method

Analyte

EPA 531.1AB Analyte ID Method ID

Aldicarb (Temik) PA 7010 10091006

Aldicarb sulfone PA 7015 10091006

Aldicarb sulfoxide PA 7020 10091006

Carbofuran (Furaden) PA 7205 10091006

Oxamyl (Vydate) PA 7940 10091006

Method

Analyte

SM 2340 CAB Analyte ID Method ID

Total hardness as CaCO3 PA 1755 20047001

Method

Analyte

SM 2510 BAB Analyte ID Method ID

Conductivity PA 1610 20048004

Method

Analyte

SM 2540 CAB Analyte ID Method ID

Residue-filterable (TDS) PA 1955 20049803

Method

Analyte

SM 2540 DAB Analyte ID Method ID

Residue-nonfilterable (TSS) PA 1960 20004802

Method

Analyte

SM 4500-F¯ CAB Analyte ID Method ID

Fluoride PA 1730 20101808

Page 11 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Drinking WaterMatrix:

Method

Analyte

SM 9215 BAB Analyte ID Method ID

Heterotrophic plate count PA 2555 20180001

Method

Analyte

SM 9223-IDEXX Laboratories Colilert® Test

AB Analyte ID Method ID

Total coliforms and E. coli (P/A) PA 2502 20212413

Page 12 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Method

Analyte

EPA 1010AB Analyte ID Method ID

Ignitability PA 1780 10116606

Method

Analyte

EPA 130.2AB Analyte ID Method ID

Total hardness as CaCO3 PA 1755 10007202

Method

Analyte

EPA 1311AB Analyte ID Method ID

TCLP PA 849 10118806

Method

Analyte

EPA 1312AB Analyte ID Method ID

SPLP PA 850 10119003

Method

Analyte

EPA 160.1AB Analyte ID Method ID

Residue-filterable (TDS) PA 1955 10009208

Method

Analyte

EPA 160.4AB Analyte ID Method ID

Residue-volatile PA 1970 10010409

Method

Analyte

EPA 1613AB Analyte ID Method ID

1,2,3,4,6,7,8,9-Octachlorodibenzofuran (OCDF) PA 9516 10120204

1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin (OCDD) PA 9519 10120204

1,2,3,4,6,7,8-Heptachlorodibenzofuran (1,2,3,4,6,7,8-HpCDF) PA 9420 10120204

1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin (1,2,3,4,6,7,8-HpCDD) PA 9426 10120204

1,2,3,4,7,8,9-Heptachlorodibenzofuran (1,2,3,4,7,8,9-HpCDF) PA 9423 10120204

1,2,3,4,7,8-Hexachlorodibenzofuran (1,2,3,4,7,8-HxCDF) PA 9471 10120204

1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin (1,2,3,4,7,8-HxCDD) PA 9453 10120204

1,2,3,6,7,8-Hexachlorodibenzofuran (1,2,3,6,7,8-HxCDF) PA 9474 10120204

1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin(1,2,3,6,7,8-HxCDD) PA 9456 10120204

1,2,3,7,8,9-Hexachlorodibenzofuran (1,2,3,7,8,9-HxCDF) PA 9477 10120204

1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin (1,2,3,7,8,9-HxCDD) PA 9459 10120204

Page 13 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

1,2,3,7,8-Pentachlorodibenzofuran (1,2,3,7,8-PeCDF) PA 9543 10120204

1,2,3,7,8-Pentachlorodibenzo-p-dioxin (1,2,3,7,8-PeCDD) PA 9540 10120204

2,3,4,6,7,8-Hexachlorodibenzofuran (2,3,4,6,7,8-HxCDF) PA 9480 10120204

2,3,4,7,8-Pentachlorodibenzofuran (2,3,4,7,8-PeCDF PA 9549 10120204

2,3,7,8-Tetrachlorodibenzofuran (2,3,7,8-TCDF) PA 9612 10120204

2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) PA 9618 10120204

2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) PA 9618 10120204

Total Heptachlorodibenzofuran (Total HpCDF) PA 9444 10120204

Total Heptachlorodibenzo-p-dioxin (Total HpCDD) PA 9438 10120204

Total Hexachlorodibenzofuran (Total HxCDF) PA 9483 10120204

Total Hexachlorodibenzo-p-dioxin (Total HxCDD) PA 9468 10120204

Total Pentachlorodibenzofuran (Total PeCDF) PA 9552 10120204

Total Pentachlorodibenzo-p-dioxin (Total PeCDD) PA 9555 10120204

Total Tetrachlorodibenzofuran (Total TCDF) PA 9615 10120204

Total Tetrachlorodibenzo-p-dioxin (Total TCDD) PA 9609 10120204

Method

Analyte

EPA 1631EAB Analyte ID Method ID

Mercury PA 1095 10237204

Method

Analyte

EPA 1664AB Analyte ID Method ID

n-Hexane Extractable Material (HEM) (O&G) PA 1803 10127807

Silica Gel Treated n-Hexane Extractable Material (SGT-HEM) PA 10220 10127807

Method

Analyte

EPA 1666AB Analyte ID Method ID

4-Methyl-2-pentanone (MIBK) PA 4995 10128208

Butyl acetate PA 4403 10128208

Di-isopropylether (DIPE) PA 9375 10128208

Ethyl acetate PA 4755 10128208

Isobutyraldehyde PA 4880 10128208

Isopropyl acetate PA 4890 10128208

Isopropyl alcohol (2-Propanol, Isopropanol) PA 4895 10128208

Page 14 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Methyl formate PA 4980 10128208

n-Amyl acetate PA 4360 10128208

n-Amyl alcohol PA 4365 10128208

n-Heptane PA 4825 10128208

n-Hexane PA 4855 10128208

tert-Butyl alcohol PA 4420 10128208

Tetrahydrofuran (THF) PA 5120 10128208

Xylene (total) PA 5260 10128208

Method

Analyte

EPA 1671AB Analyte ID Method ID

Acetonitrile PA 4320 10130208

Diethylamine PA 4715 10130208

Dimethyl sulfoxide PA 4730 10130208

Ethanol PA 4750 10130208

Methanol PA 4930 10130208

Methyl cellosolve PA 4955 10130208

n-Propanol (1-Propanol) PA 5055 10130208

Triethylamine PA 5200 10130208

Method

Analyte

EPA 180.1AB Analyte ID Method ID

Turbidity PA 2055 10011606

Method

Analyte

EPA 200.7AB Analyte ID Method ID

Aluminum PA 1000 10013806

Antimony PA 1005 10013806

Arsenic PA 1010 10013806

Barium PA 1015 10013806

Beryllium PA 1020 10013806

Boron PA 1025 10013806

Cadmium PA 1030 10013806

Calcium PA 1035 10013806

Page 15 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Chromium PA 1040 10013806

Cobalt PA 1050 10013806

Copper PA 1055 10013806

Iron PA 1070 10013806

Lead PA 1075 10013806

Lithium PA 1080 10013806

Magnesium PA 1085 10013806

Manganese PA 1090 10013806

Molybdenum PA 1100 10013806

Nickel PA 1105 10013806

Potassium PA 1125 10013806

Selenium PA 1140 10013806

Silver PA 1150 10013806

Sodium PA 1155 10013806

Strontium PA 1160 10013806

Thallium PA 1165 10013806

Tin PA 1175 10013806

Titanium PA 1180 10013806

Vanadium PA 1185 10013806

Zinc PA 1190 10013806

Method

Analyte

EPA 200.8AB Analyte ID Method ID

Aluminum PA 1000 10014605

Antimony PA 1005 10014605

Arsenic PA 1010 10014605

Barium PA 1015 10014605

Beryllium PA 1020 10014605

Boron PA 1025 10014605

Cadmium PA 1030 10014605

Calcium PA 1035 10014605

Page 16 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Chromium PA 1040 10014605

Cobalt PA 1050 10014605

Copper PA 1055 10014605

Iron PA 1070 10014605

Lead PA 1075 10014605

Magnesium PA 1085 10014605

Manganese PA 1090 10014605

Molybdenum PA 1100 10014605

Nickel PA 1105 10014605

Potassium PA 1125 10014605

Selenium PA 1140 10014605

Silver PA 1150 10014605

Sodium PA 1155 10014605

Strontium PA 1160 10014605

Thallium PA 1165 10014605

Tin PA 1175 10014605

Titanium PA 1180 10014605

Vanadium PA 1185 10014605

Zinc PA 1190 10014605

Method

Analyte

EPA 218.6AB Analyte ID Method ID

Chromium (VI) PA 1045 10028009

Method

Analyte

EPA 245.1AB Analyte ID Method ID

Mercury PA 1095 10036609

Method

Analyte

EPA 300.0AB Analyte ID Method ID

Bromide PA 1540 10053006

Chloride PA 1575 10053006

Fluoride PA 1730 10053006

Nitrate as N PA 1810 10053006

Page 17 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Nitrite as N PA 1840 10053006

Sulfate PA 2000 10053006

Method

Analyte

EPA 305.1AB Analyte ID Method ID

Acidity, as CaCO3 PA 1500 10054203

Method

Analyte

EPA 335.4AB Analyte ID Method ID

Total cyanide PA 1645 10061402

Method

Analyte

EPA 350.1AB Analyte ID Method ID

Ammonia as N PA 1515 10063408

Method

Analyte

EPA 351.2AB Analyte ID Method ID

Kjeldahl Nitrogen (Total Kjeldahl Nitrogen-TKN) PA 1790 10065200

Method

Analyte

EPA 353.2AB Analyte ID Method ID

Nitrate as N PA 1810 10067400

Nitrate-nitrite PA 1820 10067400

Nitrite as N PA 1840 10067400

Method

Analyte

EPA 365.1AB Analyte ID Method ID

Phosphorus PA 1910 10069804

Method

Analyte

EPA 365.3AB Analyte ID Method ID

Orthophosphate as P PA 1870 10070801

Method

Analyte

EPA 375.4AB Analyte ID Method ID

Sulfate PA 2000 10073800

Method

Analyte

EPA 410.4AB Analyte ID Method ID

Chemical oxygen demand (COD) PA 1565 10077200

Page 18 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Method

Analyte

EPA 415.1AB Analyte ID Method ID

Total Organic Carbon (TOC) PA 2040 10078407

Method

Analyte

EPA 420.4AB Analyte ID Method ID

Total phenolics PA 1905 10080203

Method

Analyte

EPA 425.1AB Analyte ID Method ID

Surfactants - MBAS PA 2025 10080601

Method

Analyte

EPA 524.2AB Analyte ID Method ID

1,2-Dichlorobenzene PA 4610 10089006

1,2-Dichloroethane (Ethylene dichloride) PA 4635 10089006

4-Methyl-2-pentanone (MIBK) PA 4995 10089006

Acetone (2-Propanone) PA 4315 10089006

Benzene PA 4375 10089006

Chlorobenzene PA 4475 10089006

Chloroform PA 4505 10089006

Methylene chloride (Dichloromethane) PA 4975 10089006

Tetrahydrofuran (THF) PA 5120 10089006

Toluene PA 5140 10089006

Method

Analyte

EPA 6010AB Analyte ID Method ID

Aluminum PA 1000 10155803

Antimony PA 1005 10155803

Arsenic PA 1010 10155803

Barium PA 1015 10155803

Beryllium PA 1020 10155803

Boron PA 1025 10155803

Cadmium PA 1030 10155803

Calcium PA 1035 10155803

Page 19 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Chromium PA 1040 10155803

Cobalt PA 1050 10155803

Copper PA 1055 10155803

Iron PA 1070 10155803

Lead PA 1075 10155803

Lithium PA 1080 10155803

Magnesium PA 1085 10155803

Manganese PA 1090 10155803

Molybdenum PA 1100 10155803

Nickel PA 1105 10155803

Potassium PA 1125 10155803

Selenium PA 1140 10155803

Silver PA 1150 10155803

Sodium PA 1155 10155803

Strontium PA 1160 10155803

Thallium PA 1165 10155803

Tin PA 1175 10155803

Titanium PA 1180 10155803

Vanadium PA 1185 10155803

Zinc PA 1190 10155803

Method

Analyte

EPA 602AB Analyte ID Method ID

Benzene PA 4375 10102202

Ethylbenzene PA 4765 10102202

m+p-xylene PA 5240 10102202

Methyl tert-butyl ether (MTBE) PA 5000 10102202

o-Xylene PA 5250 10102202

Toluene PA 5140 10102202

Xylene (total) PA 5260 10102202

Method

Analyte

EPA 6020AB Analyte ID Method ID

Page 20 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Aluminum PA 1000 10156204

Antimony PA 1005 10156204

Arsenic PA 1010 10156204

Barium PA 1015 10156204

Beryllium PA 1020 10156204

Boron PA 1025 10156204

Cadmium PA 1030 10156204

Calcium PA 1035 10156204

Chromium PA 1040 10156204

Cobalt PA 1050 10156204

Copper PA 1055 10156204

Iron PA 1070 10156204

Lead PA 1075 10156204

Magnesium PA 1085 10156204

Manganese PA 1090 10156204

Molybdenum PA 1100 10156204

Nickel PA 1105 10156204

Potassium PA 1125 10156204

Selenium PA 1140 10156204

Silver PA 1150 10156204

Sodium PA 1155 10156204

Strontium PA 1160 10156204

Thallium PA 1165 10156204

Tin PA 1175 10156204

Titanium PA 1180 10156204

Vanadium PA 1185 10156204

Zinc PA 1190 10156204

Method

Analyte

EPA 608AB Analyte ID Method ID

4,4'-DDD PA 7355 10103603

Page 21 of 62

Page 86: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

4,4'-DDE PA 7360 10103603

4,4'-DDT PA 7365 10103603

Aldrin PA 7025 10103603

alpha-BHC (alpha-Hexachlorocyclohexane) PA 7110 10103603

Aroclor-1016 (PCB-1016) PA 8880 10103603

Aroclor-1221 (PCB-1221) PA 8885 10103603

Aroclor-1232 (PCB-1232) PA 8890 10103603

Aroclor-1242 (PCB-1242) PA 8895 10103603

Aroclor-1248 (PCB-1248) PA 8900 10103603

Aroclor-1254 (PCB-1254) PA 8905 10103603

Aroclor-1260 (PCB-1260) PA 8910 10103603

beta-BHC (beta-Hexachlorocyclohexane) PA 7115 10103603

Chlordane (tech.) PA 7250 10103603

delta-BHC (delta-Hexachlorocyclohexane) PA 7105 10103603

Dieldrin PA 7470 10103603

Endosulfan I PA 7510 10103603

Endosulfan II PA 7515 10103603

Endosulfan sulfate PA 7520 10103603

Endrin PA 7540 10103603

Endrin aldehyde PA 7530 10103603

gamma-BHC (Lindane, gamma-Hexachlorocyclohexane) PA 7120 10103603

Heptachlor PA 7685 10103603

Heptachlor epoxide PA 7690 10103603

Methoxychlor PA 7810 10103603

Toxaphene (Chlorinated camphene) PA 8250 10103603

Method

Analyte

EPA 624AB Analyte ID Method ID

1,1,1-Trichloroethane PA 5160 10107207

1,1,2,2-Tetrachloroethane PA 5110 10107207

1,1,2-Trichloroethane PA 5165 10107207

Page 22 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

1,1-Dichloroethane PA 4630 10107207

1,1-Dichloroethylene PA 4640 10107207

1,2-Dibromoethane (EDB, Ethylene dibromide) PA 4585 10107207

1,2-Dichlorobenzene PA 4610 10107207

1,2-Dichloroethane (Ethylene dichloride) PA 4635 10107207

1,2-Dichloropropane PA 4655 10107207

1,3-Dichlorobenzene PA 4615 10107207

1,4-Dichlorobenzene PA 4620 10107207

2-Butanone (Methyl ethyl ketone, MEK) PA 4410 10107207

2-Chloroethyl vinyl ether PA 4500 10107207

Acetone (2-Propanone) PA 4315 10107207

Acrolein (Propenal) PA 4325 10107207

Acrylonitrile PA 4340 10107207

Benzene PA 4375 10107207

Bromodichloromethane PA 4395 10107207

Bromoform PA 4400 10107207

Carbon tetrachloride PA 4455 10107207

Chlorobenzene PA 4475 10107207

Chlorodibromomethane PA 4575 10107207

Chloroethane (Ethyl chloride) PA 4485 10107207

Chloroform PA 4505 10107207

cis-1,2-Dichloroethylene PA 4645 10107207

cis-1,3-Dichloropropene PA 4680 10107207

Ethylbenzene PA 4765 10107207

Methyl bromide (Bromomethane) PA 4950 10107207

Methyl chloride (Chloromethane) PA 4960 10107207

Methyl tert-butyl ether (MTBE) PA 5000 10107207

Methylene chloride (Dichloromethane) PA 4975 10107207

Naphthalene PA 5005 10107207

Tetrachloroethylene (Perchloroethylene) PA 5115 10107207

Page 23 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Toluene PA 5140 10107207

Total trihalomethanes PA 5205 10107207

trans-1,2-Dichloroethylene PA 4700 10107207

trans-1,3-Dichloropropylene PA 4685 10107207

Trichloroethene (Trichloroethylene) PA 5170 10107207

Trichlorofluoromethane (Fluorotrichloromethane, Freon 11) PA 5175 10107207

Vinyl chloride PA 5235 10107207

Xylene (total) PA 5260 10107207

Method

Analyte

EPA 625AB Analyte ID Method ID

2,2'-Oxybis(1-chloropropane) (bis(2-Chloro-1-methylethyl)ether) PA 4659 10107401

1,2,4,5-Tetrachlorobenzene PA 6715 10107401

1,2,4-Trichlorobenzene PA 5155 10107401

1,2-Dichlorobenzene PA 4610 10107401

1,2-Diphenylhydrazine PA 6220 10107401

1,3-Dichlorobenzene PA 4615 10107401

1,4-Dichlorobenzene PA 4620 10107401

2,3,4,6-Tetrachlorophenol PA 6735 10107401

2,4,5-Trichlorophenol PA 6835 10107401

2,4,6-Trichlorophenol PA 6840 10107401

2,4-Dichlorophenol PA 6000 10107401

2,4-Dimethylphenol PA 6130 10107401

2,4-Dinitrophenol PA 6175 10107401

2,4-Dinitrotoluene (2,4-DNT) PA 6185 10107401

2,6-Dinitrotoluene (2,6-DNT) PA 6190 10107401

2-Chloronaphthalene PA 5795 10107401

2-Chlorophenol PA 5800 10107401

2-Methyl-4,6-dinitrophenol (4,6-Dinitro-2-methylphenol) PA 6360 10107401

2-Methylphenol (o-Cresol) PA 6400 10107401

2-Nitrophenol PA 6490 10107401

Page 24 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

3,3'-Dichlorobenzidine PA 5945 10107401

4-Bromophenyl phenyl ether (BDE-3) PA 5660 10107401

4-Chloro-3-methylphenol PA 5700 10107401

4-Chlorophenyl phenylether PA 5825 10107401

4-Nitrophenol PA 6500 10107401

Acenaphthene PA 5500 10107401

Acenaphthylene PA 5505 10107401

Anthracene PA 5555 10107401

Benzidine PA 5595 10107401

Benzo(a)anthracene PA 5575 10107401

Benzo(a)pyrene PA 5580 10107401

Benzo(b)fluoranthene PA 5585 10107401

Benzo(g,h,i)perylene PA 5590 10107401

Benzo(k)fluoranthene PA 5600 10107401

bis(2-Chloroethoxy)methane PA 5760 10107401

bis(2-Chloroethyl) ether PA 5765 10107401

bis(2-Ethylhexyl) phthalate (Di(2-Ethylhexyl) phthalate, DEHP) PA 6065 10107401

Butyl benzyl phthalate PA 5670 10107401

Chrysene PA 5855 10107401

Dibenz(a,h) anthracene PA 5895 10107401

Diethyl phthalate PA 6070 10107401

Dimethyl phthalate PA 6135 10107401

Di-n-butyl phthalate PA 5925 10107401

Di-n-octyl phthalate PA 6200 10107401

Fluoranthene PA 6265 10107401

Fluorene PA 6270 10107401

Hexachlorobenzene PA 6275 10107401

Hexachlorobutadiene PA 4835 10107401

Hexachlorocyclopentadiene PA 6285 10107401

Hexachloroethane PA 4840 10107401

Page 25 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Indeno(1,2,3-cd) pyrene PA 6315 10107401

Isophorone PA 6320 10107401

Naphthalene PA 5005 10107401

Nitrobenzene PA 5015 10107401

n-Nitrosodiethylamine PA 6525 10107401

n-Nitrosodimethylamine PA 6530 10107401

n-Nitrosodi-n-butylamine PA 5025 10107401

n-Nitrosodi-n-propylamine PA 6545 10107401

n-Nitrosodiphenylamine PA 6535 10107401

Pentachlorobenzene PA 6590 10107401

Pentachlorophenol PA 6605 10107401

Phenanthrene PA 6615 10107401

Phenol PA 6625 10107401

Pyrene PA 6665 10107401

Pyridine PA 5095 10107401

Method

Analyte

EPA 7196AB Analyte ID Method ID

Chromium (VI) PA 1045 10162400

Method

Analyte

EPA 7199AB Analyte ID Method ID

Chromium (VI) PA 1045 10163005

Method

Analyte

EPA 7470AB Analyte ID Method ID

Mercury PA 1095 10165603

Method

Analyte

EPA 8011AB Analyte ID Method ID

1,2-Dibromo-3-chloropropane (DBCP) PA 4570 10173009

1,2-Dibromoethane (EDB, Ethylene dibromide) PA 4585 10173009

Method

Analyte

EPA 8015AB Analyte ID Method ID

Diesel range organics (DRO) PA 9369 10173203

Page 26 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Ethanol PA 4750 10173203

Ethylene glycol PA 4785 10173203

Gasoline range organics (GRO) PA 9408 10173203

Isobutyl alcohol (2-Methyl-1-propanol) PA 4875 10173203

Isopropyl alcohol (2-Propanol, Isopropanol) PA 4895 10173203

Methanol PA 4930 10173203

n-Butyl alcohol (1-Butanol, n-Butanol) PA 4425 10173203

n-Propanol (1-Propanol) PA 5055 10173203

Propylene Glycol PA 6657 10173203

Method

Analyte

EPA 8021AB Analyte ID Method ID

Benzene PA 4375 10174400

Ethylbenzene PA 4765 10174400

Isopropylbenzene (Cumene) PA 4900 10174400

m+p-xylene PA 5240 10174400

Methyl tert-butyl ether (MTBE) PA 5000 10174400

Naphthalene PA 5005 10174400

o-Xylene PA 5250 10174400

Toluene PA 5140 10174400

Xylene (total) PA 5260 10174400

Method

Analyte

EPA 8081AB Analyte ID Method ID

4,4'-DDD PA 7355 10178402

4,4'-DDE PA 7360 10178402

4,4'-DDT PA 7365 10178402

Aldrin PA 7025 10178402

alpha-BHC (alpha-Hexachlorocyclohexane) PA 7110 10178402

alpha-Chlordane PA 7240 10178402

beta-BHC (beta-Hexachlorocyclohexane) PA 7115 10178402

Chlordane (tech.) PA 7250 10178402

delta-BHC (delta-Hexachlorocyclohexane) PA 7105 10178402Page 27 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Dieldrin PA 7470 10178402

Endosulfan I PA 7510 10178402

Endosulfan II PA 7515 10178402

Endosulfan sulfate PA 7520 10178402

Endrin PA 7540 10178402

Endrin aldehyde PA 7530 10178402

Endrin ketone PA 7535 10178402

gamma-BHC (Lindane, gamma-Hexachlorocyclohexane) PA 7120 10178402

gamma-Chlordane PA 7245 10178402

Heptachlor PA 7685 10178402

Heptachlor epoxide PA 7690 10178402

Methoxychlor PA 7810 10178402

Mirex PA 7870 10178402

Toxaphene (Chlorinated camphene) PA 8250 10178402

Method

Analyte

EPA 8082AB Analyte ID Method ID

Aroclor-1016 (PCB-1016) PA 8880 10179007

Aroclor-1221 (PCB-1221) PA 8885 10179007

Aroclor-1232 (PCB-1232) PA 8890 10179007

Aroclor-1242 (PCB-1242) PA 8895 10179007

Aroclor-1248 (PCB-1248) PA 8900 10179007

Aroclor-1254 (PCB-1254) PA 8905 10179007

Aroclor-1260 (PCB-1260) PA 8910 10179007

Decachlorobiphenyl (BZ-209) PA 9105 10179007

PCBs (total) PA 8870 10179007

Method

Analyte

EPA 8141AB Analyte ID Method ID

Atrazine PA 7065 10182000

Azinphos-methyl (Guthion) PA 7075 10182000

Bolstar (Sulprofos) PA 7125 10182000

Carbophenothion PA 7220 10182000Page 28 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Chlorpyrifos (Dursban) PA 7300 10182000

Coumaphos PA 7315 10182000

Demeton-o PA 7395 10182000

Demeton-s PA 7385 10182000

Diazinon PA 7410 10182000

Dichlorovos (DDVP, Dichlorvos) PA 8610 10182000

Disulfoton PA 8625 10182000

EPN (Phosphonothioic acid, phenyl-, O-ethyl O-(p-nitrophenyl) ester) PA 7550 10182000

Ethion PA 7565 10182000

Ethoprop PA 7570 10182000

Famphur PA 7580 10182000

Fensulfothion PA 7600 10182000

Fenthion PA 7605 10182000

Malathion PA 7770 10182000

Merphos PA 7785 10182000

Methyl parathion (Parathion, methyl) PA 7825 10182000

Mevinphos PA 7850 10182000

Naled PA 7905 10182000

Parathion, ethyl PA 7955 10182000

Phorate PA 7985 10182000

Ronnel PA 8110 10182000

Simazine PA 8125 10182000

Tetrachlorvinphos (Stirophos, Gardona) PA 8197 10182000

Tokuthion (Prothiophos) PA 8245 10182000

Trichloronate PA 8275 10182000

Method

Analyte

EPA 8151AB Analyte ID Method ID

2,4,5-T PA 8655 10183003

2,4-D PA 8545 10183003

2,4-DB PA 8560 10183003

Page 29 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Dalapon PA 8555 10183003

Dicamba PA 8595 10183003

Dichloroprop (Dichlorprop, Weedone) PA 8605 10183003

Dinoseb (2-sec-butyl-4,6-dinitrophenol, DNBP) PA 8620 10183003

MCPA PA 7775 10183003

MCPP PA 7780 10183003

Pentachlorophenol PA 6605 10183003

Picloram PA 8645 10183003

Silvex (2,4,5-TP) PA 8650 10183003

Method

Analyte

EPA 8260AB Analyte ID Method ID

1,1,1,2-Tetrachloroethane PA 5105 10184802

1,1,1-Trichloroethane PA 5160 10184802

1,1,2,2-Tetrachloroethane PA 5110 10184802

1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113) PA 5195 10184802

1,1,2-Trichloroethane PA 5165 10184802

1,1-Dichloroethane PA 4630 10184802

1,1-Dichloroethylene PA 4640 10184802

1,1-Dichloropropene PA 4670 10184802

1,2,3-Trichlorobenzene PA 5150 10184802

1,2,3-Trichloropropane PA 5180 10184802

1,2,4-Trichlorobenzene PA 5155 10184802

1,2,4-Trimethylbenzene PA 5210 10184802

1,2-Dibromo-3-chloropropane (DBCP) PA 4570 10184802

1,2-Dibromoethane (EDB, Ethylene dibromide) PA 4585 10184802

1,2-Dichlorobenzene PA 4610 10184802

1,2-Dichloroethane (Ethylene dichloride) PA 4635 10184802

1,2-Dichloropropane PA 4655 10184802

1,3,5-Trimethylbenzene PA 5215 10184802

1,3-Dichlorobenzene PA 4615 10184802

Page 30 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

1,3-Dichloropropane PA 4660 10184802

1,4-Dichlorobenzene PA 4620 10184802

1,4-Dioxane (1,4-Diethyleneoxide) PA 4735 10184802

2,2-Dichloropropane PA 4665 10184802

2-Butanone (Methyl ethyl ketone, MEK) PA 4410 10184802

2-Chloroethyl vinyl ether PA 4500 10184802

2-Chlorotoluene PA 4535 10184802

2-Hexanone (MBK) PA 4860 10184802

2-Nitropropane PA 5020 10184802

4-Chlorotoluene PA 4540 10184802

4-Isopropyltoluene (p-Cymene) PA 4915 10184802

4-Methyl-2-pentanone (MIBK) PA 4995 10184802

Acetone (2-Propanone) PA 4315 10184802

Acetonitrile PA 4320 10184802

Acrolein (Propenal) PA 4325 10184802

Acrylonitrile PA 4340 10184802

Allyl chloride (3-Chloropropene) PA 4355 10184802

Benzene PA 4375 10184802

Benzyl chloride PA 5635 10184802

Bromobenzene PA 4385 10184802

Bromochloromethane PA 4390 10184802

Bromodichloromethane PA 4395 10184802

Bromoform PA 4400 10184802

Carbon disulfide PA 4450 10184802

Carbon tetrachloride PA 4455 10184802

Chlorobenzene PA 4475 10184802

Chlorodibromomethane PA 4575 10184802

Chloroethane (Ethyl chloride) PA 4485 10184802

Chloroform PA 4505 10184802

Chloroprene (2-Chloro-1,3-butadiene) PA 4525 10184802

Page 31 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

cis-1,2-Dichloroethylene PA 4645 10184802

cis-1,3-Dichloropropene PA 4680 10184802

Crotonaldehyde PA 4545 10184802

Dibromomethane (Methylene bromide) PA 4595 10184802

Dichlorodifluoromethane (Freon-12) PA 4625 10184802

Diethyl ether PA 4725 10184802

Di-isopropylether (DIPE) PA 9375 10184802

Ethanol PA 4750 10184802

Ethyl acetate PA 4755 10184802

Ethyl methacrylate PA 4810 10184802

Ethylbenzene PA 4765 10184802

Ethylene oxide PA 4795 10184802

Ethyl-t-butylether (ETBE) (2-Ethoxy-2-methylpropane) PA 4770 10184802

Hexachlorobutadiene PA 4835 10184802

Hexachloroethane PA 4840 10184802

Iodomethane (Methyl iodide) PA 4870 10184802

Isobutyl alcohol (2-Methyl-1-propanol) PA 4875 10184802

Isopropyl alcohol (2-Propanol, Isopropanol) PA 4895 10184802

Isopropylbenzene (Cumene) PA 4900 10184802

m+p-xylene PA 5240 10184802

Methacrylonitrile PA 4925 10184802

Methyl acetate PA 4940 10184802

Methyl bromide (Bromomethane) PA 4950 10184802

Methyl chloride (Chloromethane) PA 4960 10184802

Methyl methacrylate PA 4990 10184802

Methyl tert-butyl ether (MTBE) PA 5000 10184802

Methylcyclohexane PA 4965 10184802

Methylene chloride (Dichloromethane) PA 4975 10184802

Naphthalene PA 5005 10184802

n-Butyl alcohol (1-Butanol, n-Butanol) PA 4425 10184802

Page 32 of 62

Page 97: GROUNDWATER SAMPLING REPORT for Residential ......Groundwater Sampling Report Residential Drinking Water Well Sampling (Phase II) Channelview and Highlands, Texas Langan Project No

Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

n-Butylbenzene PA 4435 10184802

n-Propylamine PA 5085 10184802

n-Propylbenzene PA 5090 10184802

o-Xylene PA 5250 10184802

Pentachloroethane PA 5035 10184802

Propionitrile (Ethyl cyanide) PA 5080 10184802

sec-Butylbenzene PA 4440 10184802

Styrene PA 5100 10184802

T-amylmethylether (TAME) PA 4370 10184802

tert-Butyl alcohol PA 4420 10184802

tert-Butylbenzene PA 4445 10184802

Tetrachloroethylene (Perchloroethylene) PA 5115 10184802

Toluene PA 5140 10184802

trans-1,2-Dichloroethylene PA 4700 10184802

trans-1,3-Dichloropropylene PA 4685 10184802

trans-1,4-Dichloro-2-butene PA 4605 10184802

Trichloroethene (Trichloroethylene) PA 5170 10184802

Trichlorofluoromethane (Fluorotrichloromethane, Freon 11) PA 5175 10184802

Vinyl acetate PA 5225 10184802

Vinyl chloride PA 5235 10184802

Xylene (total) PA 5260 10184802

Method

Analyte

EPA 8270AB Analyte ID Method ID

2,2'-Oxybis(1-chloropropane) (bis(2-Chloro-1-methylethyl)ether) PA 4659 10186002

1,2,4,5-Tetrachlorobenzene PA 6715 10186002

1,2,4-Trichlorobenzene PA 5155 10186002

1,2-Dichlorobenzene PA 4610 10186002

1,2-Diphenylhydrazine PA 6220 10186002

1,3,5-Trinitrobenzene (1,3,5-TNB) PA 6885 10186002

1,3-Dichlorobenzene PA 4615 10186002

Page 33 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

1,3-Dinitrobenzene (1,3-DNB) PA 6160 10186002

1,4-Dichlorobenzene PA 4620 10186002

1,4-Dinitrobenzene PA 6165 10186002

1,4-Naphthoquinone PA 6420 10186002

1,4-Phenylenediamine PA 6630 10186002

1-Chloronaphthalene PA 5790 10186002

1-Naphthylamine PA 6425 10186002

2,3,4,6-Tetrachlorophenol PA 6735 10186002

2,4,5-Trichlorophenol PA 6835 10186002

2,4,6-Trichlorophenol PA 6840 10186002

2,4-Dichlorophenol PA 6000 10186002

2,4-Dimethylphenol PA 6130 10186002

2,4-Dinitrophenol PA 6175 10186002

2,4-Dinitrotoluene (2,4-DNT) PA 6185 10186002

2,6-Dichlorophenol PA 6005 10186002

2,6-Dinitrotoluene (2,6-DNT) PA 6190 10186002

2-Acetylaminofluorene PA 5515 10186002

2-Chloronaphthalene PA 5795 10186002

2-Chlorophenol PA 5800 10186002

2-Methyl-4,6-dinitrophenol (4,6-Dinitro-2-methylphenol) PA 6360 10186002

2-Methylaniline (o-Toluidine) PA 5145 10186002

2-Methylnaphthalene PA 6385 10186002

2-Methylphenol (o-Cresol) PA 6400 10186002

2-Naphthylamine PA 6430 10186002

2-Nitroaniline PA 6460 10186002

2-Nitrophenol PA 6490 10186002

2-Picoline (2-Methylpyridine) PA 5050 10186002

3,3'-Dichlorobenzidine PA 5945 10186002

3,3'-Dimethylbenzidine PA 6120 10186002

3-Methylcholanthrene PA 6355 10186002

Page 34 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

3-Methylphenol (m-Cresol) PA 6405 10186002

3-Nitroaniline PA 6465 10186002

4,4'-Methylenebis(2-chloroaniline) PA 6365 10186002

4-Aminobiphenyl PA 5540 10186002

4-Bromophenyl phenyl ether (BDE-3) PA 5660 10186002

4-Chloro-3-methylphenol PA 5700 10186002

4-Chloroaniline PA 5745 10186002

4-Chlorophenyl phenylether PA 5825 10186002

4-Dimethyl aminoazobenzene PA 6105 10186002

4-Methylphenol (p-Cresol) PA 6410 10186002

4-Nitroaniline PA 6470 10186002

4-Nitrophenol PA 6500 10186002

4-Nitroquinoline-1-oxide PA 6510 10186002

5-Nitro-o-toluidine PA 6570 10186002

7,12-Dimethylbenz(a) anthracene PA 6115 10186002

a-a-Dimethylphenethylamine PA 6125 10186002

Acenaphthene PA 5500 10186002

Acenaphthylene PA 5505 10186002

Acetophenone PA 5510 10186002

Aniline PA 5545 10186002

Anthracene PA 5555 10186002

Aramite PA 5560 10186002

Atrazine PA 7065 10186002

Benzenethiol (Thiophenol) PA 6750 10186002

Benzidine PA 5595 10186002

Benzo(a)anthracene PA 5575 10186002

Benzo(a)pyrene PA 5580 10186002

Benzo(b)fluoranthene PA 5585 10186002

Benzo(g,h,i)perylene PA 5590 10186002

Benzo(k)fluoranthene PA 5600 10186002

Page 35 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Benzoic acid PA 5610 10186002

Benzyl alcohol PA 5630 10186002

Biphenyl PA 5640 10186002

bis(2-Chloroethoxy)methane PA 5760 10186002

bis(2-Chloroethyl) ether PA 5765 10186002

bis(2-Ethylhexyl) phthalate (Di(2-Ethylhexyl) phthalate, DEHP) PA 6065 10186002

Butyl benzyl phthalate PA 5670 10186002

Caprolactam PA 7180 10186002

Carbazole PA 5680 10186002

Chlorobenzilate PA 7260 10186002

Chrysene PA 5855 10186002

Diallate PA 7405 10186002

Dibenz(a,h) anthracene PA 5895 10186002

Dibenz(a,j) acridine PA 5900 10186002

Dibenzofuran PA 5905 10186002

Diethyl phthalate PA 6070 10186002

Dimethoate PA 7475 10186002

Dimethyl phthalate PA 6135 10186002

Di-n-butyl phthalate PA 5925 10186002

Di-n-octyl phthalate PA 6200 10186002

Dinoseb (2-sec-butyl-4,6-dinitrophenol, DNBP) PA 8620 10186002

Diphenylamine PA 6205 10186002

Disulfoton PA 8625 10186002

Ethyl methanesulfonate PA 6260 10186002

Famphur PA 7580 10186002

Fluoranthene PA 6265 10186002

Fluorene PA 6270 10186002

Hexachlorobenzene PA 6275 10186002

Hexachlorobutadiene PA 4835 10186002

Hexachlorocyclopentadiene PA 6285 10186002

Page 36 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Hexachloroethane PA 4840 10186002

Hexachloropropene PA 6295 10186002

Indeno(1,2,3-cd) pyrene PA 6315 10186002

Isodrin PA 7725 10186002

Isophorone PA 6320 10186002

Isosafrole PA 6325 10186002

Kepone PA 7740 10186002

Methapyrilene PA 6345 10186002

Methyl methanesulfonate PA 6375 10186002

Methyl parathion (Parathion, methyl) PA 7825 10186002

Naphthalene PA 5005 10186002

Nitrobenzene PA 5015 10186002

n-Nitrosodiethylamine PA 6525 10186002

n-Nitrosodimethylamine PA 6530 10186002

n-Nitrosodi-n-butylamine PA 5025 10186002

n-Nitrosodi-n-propylamine PA 6545 10186002

n-Nitrosodiphenylamine PA 6535 10186002

n-Nitrosomethylethylamine PA 6550 10186002

n-Nitrosomorpholine PA 6555 10186002

n-Nitrosopiperidine PA 6560 10186002

n-Nitrosopyrrolidine PA 6565 10186002

o,o,o-Triethyl phosphorothioate PA 8290 10186002

Parathion, ethyl PA 7955 10186002

Pentachlorobenzene PA 6590 10186002

Pentachloronitrobenzene (PCNB) PA 6600 10186002

Pentachlorophenol PA 6605 10186002

Phenacetin PA 6610 10186002

Phenanthrene PA 6615 10186002

Phenol PA 6625 10186002

Phorate PA 7985 10186002

Page 37 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Phthalic anhydride PA 6640 10186002

Pronamide (Kerb) PA 6650 10186002

Pyrene PA 6665 10186002

Pyridine PA 5095 10186002

Safrole PA 6685 10186002

Sulfotepp PA 8155 10186002

Thionazin (Zinophos) PA 8235 10186002

tris-(2,3-Dibromopropyl) phosphate (tris-BP) PA 8310 10186002

Method

Analyte

EPA 8290AB Analyte ID Method ID

1,2,3,4,6,7,8,9-Octachlorodibenzofuran (OCDF) PA 9516 10187403

1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin (OCDD) PA 9519 10187403

1,2,3,4,6,7,8-Heptachlorodibenzofuran (1,2,3,4,6,7,8-HpCDF) PA 9420 10187403

1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin (1,2,3,4,6,7,8-HpCDD) PA 9426 10187403

1,2,3,4,7,8,9-Heptachlorodibenzofuran (1,2,3,4,7,8,9-HpCDF) PA 9423 10187403

1,2,3,4,7,8-Hexachlorodibenzofuran (1,2,3,4,7,8-HxCDF) PA 9471 10187403

1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin (1,2,3,4,7,8-HxCDD) PA 9453 10187403

1,2,3,6,7,8-Hexachlorodibenzofuran (1,2,3,6,7,8-HxCDF) PA 9474 10187403

1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin(1,2,3,6,7,8-HxCDD) PA 9456 10187403

1,2,3,7,8,9-Hexachlorodibenzofuran (1,2,3,7,8,9-HxCDF) PA 9477 10187403

1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin (1,2,3,7,8,9-HxCDD) PA 9459 10187403

1,2,3,7,8-Pentachlorodibenzofuran (1,2,3,7,8-PeCDF) PA 9543 10187403

1,2,3,7,8-Pentachlorodibenzo-p-dioxin (1,2,3,7,8-PeCDD) PA 9540 10187403

2,3,4,6,7,8-Hexachlorodibenzofuran (2,3,4,6,7,8-HxCDF) PA 9480 10187403

2,3,4,7,8-Pentachlorodibenzofuran (2,3,4,7,8-PeCDF PA 9549 10187403

2,3,7,8-Tetrachlorodibenzofuran (2,3,7,8-TCDF) PA 9612 10187403

2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) PA 9618 10187403

Total Heptachlorodibenzofuran (Total HpCDF) PA 9444 10187403

Total Heptachlorodibenzo-p-dioxin (Total HpCDD) PA 9438 10187403

Total Hexachlorodibenzofuran (Total HxCDF) PA 9483 10187403

Page 38 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Total Hexachlorodibenzo-p-dioxin (Total HxCDD) PA 9468 10187403

Total Pentachlorodibenzofuran (Total PeCDF) PA 9552 10187403

Total Pentachlorodibenzo-p-dioxin (Total PeCDD) PA 9555 10187403

Total Tetrachlorodibenzofuran (Total TCDF) PA 9615 10187403

Total Tetrachlorodibenzo-p-dioxin (Total TCDD) PA 9609 10187403

Method

Analyte

EPA 8315AB Analyte ID Method ID

2,5-Dimethylbenzaldehyde PA 6110 10187801

Acetaldehyde PA 4300 10187801

Benzaldehyde PA 5570 10187801

Butylaldehyde (Butanal) PA 4430 10187801

Crotonaldehyde PA 4545 10187801

Formaldehyde PA 4815 10187801

Hexanaldehyde (Hexanal) PA 3825 10187801

Isovaleraldehyde PA 6330 10187801

m-Tolualdehyde (1,3-Tolualdehyde) PA 5125 10187801

o-Tolualdehyde (1,2-Tolualdehyde) PA 6755 10187801

Propionaldehyde (Propanal) PA 3965 10187801

p-Tolualdehyde (1,4-Tolualdehyde) PA 6760 10187801

Valeraldehyde (Pentanal, Pentanaldehyde) PA 4040 10187801

Method

Analyte

EPA 8330AB Analyte ID Method ID

1,3,5-Trinitrobenzene (1,3,5-TNB) PA 6885 10189807

1,3-Dinitrobenzene (1,3-DNB) PA 6160 10189807

2,4,6-Trinitrotoluene (2,4,6-TNT) PA 9651 10189807

2,4-Dinitrotoluene (2,4-DNT) PA 6185 10189807

2,6-Dinitrotoluene (2,6-DNT) PA 6190 10189807

2-Amino-4,6-dinitrotoluene (2-am-dnt) PA 9303 10189807

2-Nitrotoluene PA 9507 10189807

3-Nitrotoluene PA 9510 10189807

4-Amino-2,6-dinitrotoluene (4-am-dnt) PA 9306 10189807Page 39 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

4-Nitrotoluene PA 9513 10189807

Methyl-2,4,6-trinitrophenylnitramine (tetryl) PA 6415 10189807

Nitrobenzene PA 5015 10189807

Nitroglycerin PA 6485 10189807

Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) PA 9522 10189807

Pentaerythritoltetranitrate (PETN) PA 9558 10189807

RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) PA 9432 10189807

Method

Analyte

EPA 9012AB Analyte ID Method ID

Total cyanide PA 1645 10193201

Method

Analyte

EPA 9040AB Analyte ID Method ID

pH PA 1900 10196802

Method

Analyte

EPA 9050AB Analyte ID Method ID

Conductivity PA 1610 10198604

Method

Analyte

EPA 9056AB Analyte ID Method ID

Bromide PA 1540 10199209

Chloride PA 1575 10199209

Fluoride PA 1730 10199209

Nitrate as N PA 1810 10199209

Nitrite as N PA 1840 10199209

Sulfate PA 2000 10199209

Method

Analyte

EPA 9060AB Analyte ID Method ID

Total Organic Carbon (TOC) PA 2040 10200201

Method

Analyte

EPA 9066AB Analyte ID Method ID

Total phenolics PA 1905 10200609

Page 40 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Method

Analyte

EPA RSK 175AB Analyte ID Method ID

Ethane PA 4747 10212905

Ethene PA 4752 10212905

Methane PA 4926 10212905

n-Butane PA 5007 10212905

n-Propane PA 5029 10212905

Method

Analyte

OIA-1677AB Analyte ID Method ID

Amenable cyanide PA 1510 60031405

Method

Analyte

SM 2120 BAB Analyte ID Method ID

Color PA 1605 20223807

Method

Analyte

SM 2310 B (4a)AB Analyte ID Method ID

Acidity, as CaCO3 PA 1500 20002806

Method

Analyte

SM 2320 BAB Analyte ID Method ID

Alkalinity as CaCO3 PA 1505 20045005

Method

Analyte

SM 2340 CAB Analyte ID Method ID

Total hardness as CaCO3 PA 1755 20047001

Method

Analyte

SM 2510 BAB Analyte ID Method ID

Conductivity PA 1610 20048004

Method

Analyte

SM 2540 BAB Analyte ID Method ID

Residue-total (total solids) PA 1950 20004608

Method

Analyte

SM 2540 CAB Analyte ID Method ID

Residue-filterable (TDS) PA 1955 20049803

Page 41 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Method

Analyte

SM 2540 DAB Analyte ID Method ID

Residue-nonfilterable (TSS) PA 1960 20004802

Method

Analyte

SM 2540 FAB Analyte ID Method ID

Residue-settleable PA 1965 20005009

Method

Analyte

SM 3500-Cr BAB Analyte ID Method ID

Chromium (VI) PA 1045 20065809

Method

Analyte

SM 3500-Fe BAB Analyte ID Method ID

Iron PA 1070 20068604

Method

Analyte

SM 4500-Cl FAB Analyte ID Method ID

Total residual chlorine PA 1940 20080482

Method

Analyte

SM 4500-Cl¯ CAB Analyte ID Method ID

Chloride PA 1575 20084804

Method

Analyte

SM 4500-CN¯ GAB Analyte ID Method ID

Amenable cyanide PA 1510 20021607

Method

Analyte

SM 4500-F¯ CAB Analyte ID Method ID

Fluoride PA 1730 20101808

Method

Analyte

SM 4500-H+ BAB Analyte ID Method ID

pH PA 1900 20104603

Method

Analyte

SM 4500-NH3 BAB Analyte ID Method ID

Ammonia as N PA 1515 20022804

Method

Analyte

SM 4500-NH3 CAB Analyte ID Method ID

Page 42 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Ammonia as N PA 1515 20023603

Method

Analyte

SM 4500-NH3 DAB Analyte ID Method ID

Ammonia as N PA 1515 20108809

Method

Analyte

SM 4500-O GAB Analyte ID Method ID

Oxygen, dissolved PA 1880 20025405

Method

Analyte

SM 4500-P EAB Analyte ID Method ID

Orthophosphate as P PA 1870 20025803

Method

Analyte

SM 4500-P FAB Analyte ID Method ID

Phosphorus PA 1910 20026000

Method

Analyte

SM 4500-S2¯ DAB Analyte ID Method ID

Sulfide PA 2005 20125400

Method

Analyte

SM 4500-S2¯ FAB Analyte ID Method ID

Sulfide PA 2005 20126209

Method

Analyte

SM 4500-SiO2 CAB Analyte ID Method ID

Silica as SiO2 PA 1990 20128205

Method

Analyte

SM 4500-SO3¯ BAB Analyte ID Method ID

Sulfite PA 2015 20026806

Method

Analyte

SM 5210 BAB Analyte ID Method ID

Biochemical oxygen demand (BOD) PA 1530 20027401

Carbonaceous BOD, CBOD PA 1555 20027401

Method

Analyte

SM 5310 CAB Analyte ID Method ID

Total Organic Carbon (TOC) PA 2040 20138209

Page 43 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Non-Potable WaterMatrix:

Method

Analyte

SM 5540 CAB Analyte ID Method ID

Surfactants - MBAS PA 2025 20144405

Method

Analyte

SM 9222 DAB Analyte ID Method ID

Fecal coliforms (enumeration) PA 2530 20037405

Method

Analyte

TCEQ 1005AB Analyte ID Method ID

Total Petroleum Hydrocarbons (TPH) PA 2050 90019208

Page 44 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Method

Analyte

EPA 1010AB Analyte ID Method ID

Ignitability PA 1780 10116606

Method

Analyte

EPA 1311AB Analyte ID Method ID

TCLP PA 849 10118806

Method

Analyte

EPA 1312AB Analyte ID Method ID

SPLP PA 850 10119003

Method

Analyte

EPA 1668AB Analyte ID Method ID

Decachlorobiphenyls PA 10332 10129609

Dichlorobiphenyls PA 464 10129609

Heptachlorobiphenyls PA 486 10129609

Hexachlorobiphenyls PA 487 10129609

Monochlorobiphenyls PA 501 10129609

Nonachlorobiphenyls PA 507 10129609

Octachlorobiphenyls PA 508 10129609

Pentachlorobiphenyls PA 515 10129609

Tetrachlorobiphenyls PA 528 10129609

Trichlorobiphenyls PA 541 10129609

Method

Analyte

EPA 300.0AB Analyte ID Method ID

Bromide PA 1540 10053006

Chloride PA 1575 10053006

Fluoride PA 1730 10053006

Nitrate as N PA 1810 10053006

Nitrite as N PA 1840 10053006

Sulfate PA 2000 10053006

Method

Analyte

EPA 350.3AB Analyte ID Method ID

Page 45 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Ammonia as N PA 1515 10064401

Method

Analyte

EPA 6010AB Analyte ID Method ID

Aluminum PA 1000 10155803

Antimony PA 1005 10155803

Arsenic PA 1010 10155803

Barium PA 1015 10155803

Beryllium PA 1020 10155803

Boron PA 1025 10155803

Cadmium PA 1030 10155803

Calcium PA 1035 10155803

Chromium PA 1040 10155803

Cobalt PA 1050 10155803

Copper PA 1055 10155803

Iron PA 1070 10155803

Lead PA 1075 10155803

Lithium PA 1080 10155803

Magnesium PA 1085 10155803

Manganese PA 1090 10155803

Molybdenum PA 1100 10155803

Nickel PA 1105 10155803

Potassium PA 1125 10155803

Selenium PA 1140 10155803

Silica as SiO2 PA 1990 10155803

Silver PA 1150 10155803

Sodium PA 1155 10155803

Strontium PA 1160 10155803

Thallium PA 1165 10155803

Tin PA 1175 10155803

Titanium PA 1180 10155803

Page 46 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Vanadium PA 1185 10155803

Zinc PA 1190 10155803

Method

Analyte

EPA 6020AB Analyte ID Method ID

Aluminum PA 1000 10156204

Antimony PA 1005 10156204

Arsenic PA 1010 10156204

Barium PA 1015 10156204

Beryllium PA 1020 10156204

Boron PA 1025 10156204

Cadmium PA 1030 10156204

Calcium PA 1035 10156204

Chromium PA 1040 10156204

Cobalt PA 1050 10156204

Copper PA 1055 10156204

Iron PA 1070 10156204

Lead PA 1075 10156204

Magnesium PA 1085 10156204

Manganese PA 1090 10156204

Molybdenum PA 1100 10156204

Nickel PA 1105 10156204

Potassium PA 1125 10156204

Selenium PA 1140 10156204

Silver PA 1150 10156204

Sodium PA 1155 10156204

Strontium PA 1160 10156204

Thallium PA 1165 10156204

Tin PA 1175 10156204

Titanium PA 1180 10156204

Vanadium PA 1185 10156204

Page 47 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Zinc PA 1190 10156204

Method

Analyte

EPA 7196AB Analyte ID Method ID

Chromium (VI) PA 1045 10162206

Method

Analyte

EPA 7199AB Analyte ID Method ID

Chromium (VI) PA 1045 10163005

Method

Analyte

EPA 7471AB Analyte ID Method ID

Mercury PA 1095 10166004

Method

Analyte

EPA 8015AB Analyte ID Method ID

Diesel range organics (DRO) PA 9369 10173203

Ethanol PA 4750 10173203

Ethylene glycol PA 4785 10173203

Gasoline range organics (GRO) PA 9408 10173203

Isopropyl alcohol (2-Propanol, Isopropanol) PA 4895 10173203

Methanol PA 4930 10173203

Method

Analyte

EPA 8021AB Analyte ID Method ID

Benzene PA 4375 10174400

Ethylbenzene PA 4765 10174400

Isopropylbenzene (Cumene) PA 4900 10174400

m+p-xylene PA 5240 10174400

Methyl tert-butyl ether (MTBE) PA 5000 10174400

Naphthalene PA 5005 10174400

o-Xylene PA 5250 10174400

Toluene PA 5140 10174400

Xylene (total) PA 5260 10174400

Method

Analyte

EPA 8081AB Analyte ID Method ID

Page 48 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

4,4'-DDD PA 7355 10178402

4,4'-DDE PA 7360 10178402

4,4'-DDT PA 7365 10178402

Aldrin PA 7025 10178402

alpha-BHC (alpha-Hexachlorocyclohexane) PA 7110 10178402

alpha-Chlordane PA 7240 10178402

beta-BHC (beta-Hexachlorocyclohexane) PA 7115 10178402

Chlordane (tech.) PA 7250 10178402

delta-BHC (delta-Hexachlorocyclohexane) PA 7105 10178402

Dieldrin PA 7470 10178402

Endosulfan I PA 7510 10178402

Endosulfan II PA 7515 10178402

Endosulfan sulfate PA 7520 10178402

Endrin PA 7540 10178402

Endrin aldehyde PA 7530 10178402

Endrin ketone PA 7535 10178402

gamma-BHC (Lindane, gamma-Hexachlorocyclohexane) PA 7120 10178402

gamma-Chlordane PA 7245 10178402

Heptachlor PA 7685 10178402

Heptachlor epoxide PA 7690 10178402

Methoxychlor PA 7810 10178402

Mirex PA 7870 10178402

Toxaphene (Chlorinated camphene) PA 8250 10178402

Method

Analyte

EPA 8082AB Analyte ID Method ID

Aroclor-1016 (PCB-1016) PA 8880 10179007

Aroclor-1221 (PCB-1221) PA 8885 10179007

Aroclor-1232 (PCB-1232) PA 8890 10179007

Aroclor-1242 (PCB-1242) PA 8895 10179007

Aroclor-1248 (PCB-1248) PA 8900 10179007

Page 49 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Aroclor-1254 (PCB-1254) PA 8905 10179007

Aroclor-1260 (PCB-1260) PA 8910 10179007

Decachlorobiphenyl (BZ-209) PA 9105 10179007

PCBs (total) PA 8870 10179007

Method

Analyte

EPA 8141AB Analyte ID Method ID

Atrazine PA 7065 10182000

Azinphos-methyl (Guthion) PA 7075 10182000

Bolstar (Sulprofos) PA 7125 10182000

Carbophenothion PA 7220 10182000

Chlorpyrifos (Dursban) PA 7300 10182000

Coumaphos PA 7315 10182000

Demeton-o PA 7395 10182000

Demeton-s PA 7385 10182000

Diazinon PA 7410 10182000

Dichlorovos (DDVP, Dichlorvos) PA 8610 10182000

Disulfoton PA 8625 10182000

EPN (Phosphonothioic acid, phenyl-, O-ethyl O-(p-nitrophenyl) ester) PA 7550 10182000

Ethion PA 7565 10182000

Ethoprop PA 7570 10182000

Famphur PA 7580 10182000

Fensulfothion PA 7600 10182000

Fenthion PA 7605 10182000

Malathion PA 7770 10182000

Merphos PA 7785 10182000

Methyl parathion (Parathion, methyl) PA 7825 10182000

Mevinphos PA 7850 10182000

Naled PA 7905 10182000

Parathion, ethyl PA 7955 10182000

Phorate PA 7985 10182000

Page 50 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Ronnel PA 8110 10182000

Simazine PA 8125 10182000

Tetrachlorvinphos (Stirophos, Gardona) PA 8197 10182000

Tokuthion (Prothiophos) PA 8245 10182000

Trichloronate PA 8275 10182000

Method

Analyte

EPA 8151AB Analyte ID Method ID

2,4,5-T PA 8655 10183003

2,4-D PA 8545 10183003

2,4-DB PA 8560 10183003

Dalapon PA 8555 10183003

Dicamba PA 8595 10183003

Dichloroprop (Dichlorprop, Weedone) PA 8605 10183003

Dinoseb (2-sec-butyl-4,6-dinitrophenol, DNBP) PA 8620 10183003

MCPA PA 7775 10183003

MCPP PA 7780 10183003

Pentachlorophenol PA 6605 10183003

Picloram PA 8645 10183003

Silvex (2,4,5-TP) PA 8650 10183003

Method

Analyte

EPA 8260AB Analyte ID Method ID

1,1,1,2-Tetrachloroethane PA 5105 10184802

1,1,1-Trichloroethane PA 5160 10184802

1,1,2,2-Tetrachloroethane PA 5110 10184802

1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113) PA 5195 10184802

1,1,2-Trichloroethane PA 5165 10184802

1,1-Dichloroethane PA 4630 10184802

1,1-Dichloroethylene PA 4640 10184802

1,1-Dichloropropene PA 4670 10184802

1,2,3-Trichlorobenzene PA 5150 10184802

1,2,3-Trichloropropane PA 5180 10184802Page 51 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

1,2,4-Trichlorobenzene PA 5155 10184802

1,2,4-Trimethylbenzene PA 5210 10184802

1,2-Dibromo-3-chloropropane (DBCP) PA 4570 10184802

1,2-Dibromoethane (EDB, Ethylene dibromide) PA 4585 10184802

1,2-Dichlorobenzene PA 4610 10184802

1,2-Dichloroethane (Ethylene dichloride) PA 4635 10184802

1,2-Dichloropropane PA 4655 10184802

1,3,5-Trimethylbenzene PA 5215 10184802

1,3-Dichlorobenzene PA 4615 10184802

1,3-Dichloropropane PA 4660 10184802

1,4-Dichlorobenzene PA 4620 10184802

1,4-Dioxane (1,4-Diethyleneoxide) PA 4735 10184802

2,2-Dichloropropane PA 4665 10184802

2-Butanone (Methyl ethyl ketone, MEK) PA 4410 10184802

2-Chloroethyl vinyl ether PA 4500 10184802

2-Chlorotoluene PA 4535 10184802

2-Hexanone (MBK) PA 4860 10184802

2-Nitropropane PA 5020 10184802

4-Chlorotoluene PA 4540 10184802

4-Isopropyltoluene (p-Cymene) PA 4915 10184802

4-Methyl-2-pentanone (MIBK) PA 4995 10184802

Acetone (2-Propanone) PA 4315 10184802

Acetonitrile PA 4320 10184802

Acrolein (Propenal) PA 4325 10184802

Acrylonitrile PA 4340 10184802

Allyl chloride (3-Chloropropene) PA 4355 10184802

Benzene PA 4375 10184802

Benzyl chloride PA 5635 10184802

Bromobenzene PA 4385 10184802

Bromochloromethane PA 4390 10184802

Page 52 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Bromodichloromethane PA 4395 10184802

Bromoform PA 4400 10184802

Carbon disulfide PA 4450 10184802

Carbon tetrachloride PA 4455 10184802

Chlorobenzene PA 4475 10184802

Chlorodibromomethane PA 4575 10184802

Chloroethane (Ethyl chloride) PA 4485 10184802

Chloroform PA 4505 10184802

Chloroprene (2-Chloro-1,3-butadiene) PA 4525 10184802

cis-1,2-Dichloroethylene PA 4645 10184802

cis-1,3-Dichloropropene PA 4680 10184802

Crotonaldehyde PA 4545 10184802

Dibromomethane (Methylene bromide) PA 4595 10184802

Dichlorodifluoromethane (Freon-12) PA 4625 10184802

Epichlorohydrin (1-Chloro-2,3-epoxypropane) PA 4745 10184802

Ethanol PA 4750 10184802

Ethyl acetate PA 4755 10184802

Ethyl methacrylate PA 4810 10184802

Ethylbenzene PA 4765 10184802

Ethylene oxide PA 4795 10184802

Hexachlorobutadiene PA 4835 10184802

Iodomethane (Methyl iodide) PA 4870 10184802

Isobutyl alcohol (2-Methyl-1-propanol) PA 4875 10184802

Isopropyl alcohol (2-Propanol, Isopropanol) PA 4895 10184802

Isopropylbenzene (Cumene) PA 4900 10184802

m+p-xylene PA 5240 10184802

Methacrylonitrile PA 4925 10184802

Methyl acetate PA 4940 10184802

Methyl bromide (Bromomethane) PA 4950 10184802

Methyl chloride (Chloromethane) PA 4960 10184802

Page 53 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Methyl methacrylate PA 4990 10184802

Methyl tert-butyl ether (MTBE) PA 5000 10184802

Methylcyclohexane PA 4965 10184802

Methylene chloride (Dichloromethane) PA 4975 10184802

Naphthalene PA 5005 10184802

n-Butyl alcohol (1-Butanol, n-Butanol) PA 4425 10184802

n-Butylbenzene PA 4435 10184802

n-Propylbenzene PA 5090 10184802

o-Xylene PA 5250 10184802

Pentachloroethane PA 5035 10184802

Propionitrile (Ethyl cyanide) PA 5080 10184802

sec-Butylbenzene PA 4440 10184802

Styrene PA 5100 10184802

tert-Butyl alcohol PA 4420 10184802

tert-Butylbenzene PA 4445 10184802

Tetrachloroethylene (Perchloroethylene) PA 5115 10184802

Toluene PA 5140 10184802

trans-1,2-Dichloroethylene PA 4700 10184802

trans-1,3-Dichloropropylene PA 4685 10184802

trans-1,4-Dichloro-2-butene PA 4605 10184802

Trichloroethene (Trichloroethylene) PA 5170 10184802

Trichlorofluoromethane (Fluorotrichloromethane, Freon 11) PA 5175 10184802

Vinyl acetate PA 5225 10184802

Vinyl chloride PA 5235 10184802

Xylene (total) PA 5260 10184802

Method

Analyte

EPA 8270AB Analyte ID Method ID

2,2'-Oxybis(1-chloropropane) (bis(2-Chloro-1-methylethyl)ether) PA 4659 10186002

1,2,4,5-Tetrachlorobenzene PA 6715 10186002

1,2,4-Trichlorobenzene PA 5155 10186002

Page 54 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

1,2-Dichlorobenzene PA 4610 10186002

1,2-Dinitrobenzene PA 6155 10186002

1,2-Diphenylhydrazine PA 6220 10186002

1,3,5-Trinitrobenzene (1,3,5-TNB) PA 6885 10186002

1,3-Dichlorobenzene PA 4615 10186002

1,3-Dinitrobenzene (1,3-DNB) PA 6160 10186002

1,4-Dichlorobenzene PA 4620 10186002

1,4-Dinitrobenzene PA 6165 10186002

1,4-Naphthoquinone PA 6420 10186002

1,4-Phenylenediamine PA 6630 10186002

1-Chloronaphthalene PA 5790 10186002

1-Naphthylamine PA 6425 10186002

2,3,4,6-Tetrachlorophenol PA 6735 10186002

2,4,5-Trichlorophenol PA 6835 10186002

2,4,6-Trichlorophenol PA 6840 10186002

2,4-Dichlorophenol PA 6000 10186002

2,4-Dimethylphenol PA 6130 10186002

2,4-Dinitrophenol PA 6175 10186002

2,4-Dinitrotoluene (2,4-DNT) PA 6185 10186002

2,6-Dichlorophenol PA 6005 10186002

2,6-Dinitrotoluene (2,6-DNT) PA 6190 10186002

2-Acetylaminofluorene PA 5515 10186002

2-Chloronaphthalene PA 5795 10186002

2-Chlorophenol PA 5800 10186002

2-Methyl-4,6-dinitrophenol (4,6-Dinitro-2-methylphenol) PA 6360 10186002

2-Methylaniline (o-Toluidine) PA 5145 10186002

2-Methylnaphthalene PA 6385 10186002

2-Methylphenol (o-Cresol) PA 6400 10186002

2-Naphthylamine PA 6430 10186002

2-Nitroaniline PA 6460 10186002

Page 55 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

2-Nitrophenol PA 6490 10186002

2-Picoline (2-Methylpyridine) PA 5050 10186002

3,3'-Dichlorobenzidine PA 5945 10186002

3,3'-Dimethoxybenzidine PA 6100 10186002

3,3'-Dimethylbenzidine PA 6120 10186002

3-Methylcholanthrene PA 6355 10186002

3-Methylphenol (m-Cresol) PA 6405 10186002

3-Nitroaniline PA 6465 10186002

4,4'-Methylenebis(2-chloroaniline) PA 6365 10186002

4-Aminobiphenyl PA 5540 10186002

4-Bromophenyl phenyl ether (BDE-3) PA 5660 10186002

4-Chloro-3-methylphenol PA 5700 10186002

4-Chloroaniline PA 5745 10186002

4-Chlorophenyl phenylether PA 5825 10186002

4-Dimethyl aminoazobenzene PA 6105 10186002

4-Methylphenol (p-Cresol) PA 6410 10186002

4-Nitroaniline PA 6470 10186002

4-Nitrophenol PA 6500 10186002

4-Nitroquinoline-1-oxide PA 6510 10186002

5-Nitro-o-toluidine PA 6570 10186002

7,12-Dimethylbenz(a) anthracene PA 6115 10186002

a-a-Dimethylphenethylamine PA 6125 10186002

Acenaphthene PA 5500 10186002

Acenaphthylene PA 5505 10186002

Acetophenone PA 5510 10186002

Aniline PA 5545 10186002

Anthracene PA 5555 10186002

Aramite PA 5560 10186002

Atrazine PA 7065 10186002

Benzenethiol (Thiophenol) PA 6750 10186002

Page 56 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Benzidine PA 5595 10186002

Benzo(a)anthracene PA 5575 10186002

Benzo(a)pyrene PA 5580 10186002

Benzo(b)fluoranthene PA 5585 10186002

Benzo(g,h,i)perylene PA 5590 10186002

Benzo(k)fluoranthene PA 5600 10186002

Benzoic acid PA 5610 10186002

Benzyl alcohol PA 5630 10186002

Biphenyl PA 5640 10186002

bis(2-Chloroethoxy)methane PA 5760 10186002

bis(2-Chloroethyl) ether PA 5765 10186002

bis(2-Ethylhexyl) phthalate (Di(2-Ethylhexyl) phthalate, DEHP) PA 6065 10186002

Butyl benzyl phthalate PA 5670 10186002

Caprolactam PA 7180 10186002

Carbazole PA 5680 10186002

Chlorobenzilate PA 7260 10186002

Chrysene PA 5855 10186002

Diallate PA 7405 10186002

Dibenz(a,h) anthracene PA 5895 10186002

Dibenz(a,j) acridine PA 5900 10186002

Dibenzofuran PA 5905 10186002

Diethyl phthalate PA 6070 10186002

Dimethoate PA 7475 10186002

Dimethyl phthalate PA 6135 10186002

Di-n-butyl phthalate PA 5925 10186002

Di-n-octyl phthalate PA 6200 10186002

Diphenylamine PA 6205 10186002

Disulfoton PA 8625 10186002

Ethyl methanesulfonate PA 6260 10186002

Famphur PA 7580 10186002

Page 57 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Fluoranthene PA 6265 10186002

Fluorene PA 6270 10186002

Hexachlorobenzene PA 6275 10186002

Hexachlorobutadiene PA 4835 10186002

Hexachlorocyclopentadiene PA 6285 10186002

Hexachloroethane PA 4840 10186002

Hexachloropropene PA 6295 10186002

Indeno(1,2,3-cd) pyrene PA 6315 10186002

Isodrin PA 7725 10186002

Isophorone PA 6320 10186002

Isosafrole PA 6325 10186002

Kepone PA 7740 10186002

Methapyrilene PA 6345 10186002

Methyl methanesulfonate PA 6375 10186002

Methyl parathion (Parathion, methyl) PA 7825 10186002

Naphthalene PA 5005 10186002

Nitrobenzene PA 5015 10186002

n-Nitrosodiethylamine PA 6525 10186002

n-Nitrosodimethylamine PA 6530 10186002

n-Nitrosodi-n-butylamine PA 5025 10186002

n-Nitrosodi-n-propylamine PA 6545 10186002

n-Nitrosodiphenylamine PA 6535 10186002

n-Nitrosomethylethylamine PA 6550 10186002

n-Nitrosomorpholine PA 6555 10186002

n-Nitrosopiperidine PA 6560 10186002

n-Nitrosopyrrolidine PA 6565 10186002

o,o,o-Triethyl phosphorothioate PA 8290 10186002

Parathion, ethyl PA 7955 10186002

Pentachlorobenzene PA 6590 10186002

Pentachloronitrobenzene (PCNB) PA 6600 10186002

Page 58 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Pentachlorophenol PA 6605 10186002

Phenacetin PA 6610 10186002

Phenanthrene PA 6615 10186002

Phenol PA 6625 10186002

Phorate PA 7985 10186002

Phthalic anhydride PA 6640 10186002

Pronamide (Kerb) PA 6650 10186002

Pyrene PA 6665 10186002

Pyridine PA 5095 10186002

Quinoline PA 6670 10186002

Safrole PA 6685 10186002

Sulfotepp PA 8155 10186002

Thionazin (Zinophos) PA 8235 10186002

tris-(2,3-Dibromopropyl) phosphate (tris-BP) PA 8310 10186002

Method

Analyte

EPA 8290AB Analyte ID Method ID

1,2,3,4,6,7,8,9-Octachlorodibenzofuran (OCDF) PA 9516 10187403

1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin (OCDD) PA 9519 10187403

1,2,3,4,6,7,8-Heptachlorodibenzofuran (1,2,3,4,6,7,8-HpCDF) PA 9420 10187403

1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin (1,2,3,4,6,7,8-HpCDD) PA 9426 10187403

1,2,3,4,7,8,9-Heptachlorodibenzofuran (1,2,3,4,7,8,9-HpCDF) PA 9423 10187403

1,2,3,4,7,8-Hexachlorodibenzofuran (1,2,3,4,7,8-HxCDF) PA 9471 10187403

1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin (1,2,3,4,7,8-HxCDD) PA 9453 10187403

1,2,3,6,7,8-Hexachlorodibenzofuran (1,2,3,6,7,8-HxCDF) PA 9474 10187403

1,2,3,6,7,8-Hexachlorodibenzo-p-dioxin(1,2,3,6,7,8-HxCDD) PA 9456 10187403

1,2,3,7,8,9-Hexachlorodibenzofuran (1,2,3,7,8,9-HxCDF) PA 9477 10187403

1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin (1,2,3,7,8,9-HxCDD) PA 9459 10187403

1,2,3,7,8-Pentachlorodibenzofuran (1,2,3,7,8-PeCDF) PA 9543 10187403

1,2,3,7,8-Pentachlorodibenzo-p-dioxin (1,2,3,7,8-PeCDD) PA 9540 10187403

2,3,4,6,7,8-Hexachlorodibenzofuran (2,3,4,6,7,8-HxCDF) PA 9480 10187403

Page 59 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

2,3,4,7,8-Pentachlorodibenzofuran (2,3,4,7,8-PeCDF PA 9549 10187403

2,3,7,8-Tetrachlorodibenzofuran (2,3,7,8-TCDF) PA 9612 10187403

2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) PA 9618 10187403

Total Heptachlorodibenzofuran (Total HpCDF) PA 9444 10187403

Total Heptachlorodibenzo-p-dioxin (Total HpCDD) PA 9438 10187403

Total Hexachlorodibenzofuran (Total HxCDF) PA 9483 10187403

Total Hexachlorodibenzo-p-dioxin (Total HxCDD) PA 9468 10187403

Total Pentachlorodibenzofuran (Total PeCDF) PA 9552 10187403

Total Pentachlorodibenzo-p-dioxin (Total PeCDD) PA 9555 10187403

Total Tetrachlorodibenzofuran (Total TCDF) PA 9615 10187403

Total Tetrachlorodibenzo-p-dioxin (Total TCDD) PA 9609 10187403

Method

Analyte

EPA 8315AB Analyte ID Method ID

2,5-Dimethylbenzaldehyde PA 6110 10187801

Acetaldehyde PA 4300 10187801

Benzaldehyde PA 5570 10187801

Butylaldehyde (Butanal) PA 4430 10187801

Crotonaldehyde PA 4545 10187801

Formaldehyde PA 4815 10187801

Hexanaldehyde (Hexanal) PA 3825 10187801

Isovaleraldehyde PA 6330 10187801

m-Tolualdehyde (1,3-Tolualdehyde) PA 5125 10187801

o-Tolualdehyde (1,2-Tolualdehyde) PA 6755 10187801

Propionaldehyde (Propanal) PA 3965 10187801

p-Tolualdehyde (1,4-Tolualdehyde) PA 6760 10187801

Valeraldehyde (Pentanal, Pentanaldehyde) PA 4040 10187801

Method

Analyte

EPA 8318AB Analyte ID Method ID

3-Hydroxycarbofuran PA 7710 10188406

Aldicarb (Temik) PA 7010 10188406

Aldicarb sulfone PA 7015 10188406Page 60 of 62

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Aldicarb sulfoxide PA 7020 10188406

Carbaryl (Sevin) PA 7195 10188406

Carbofuran (Furaden) PA 7205 10188406

Methiocarb (Mesurol) PA 7800 10188406

Methomyl (Lannate) PA 7805 10188406

Propoxur (Baygon) PA 8080 10188406

Method

Analyte

EPA 8330AB Analyte ID Method ID

1,3,5-Trinitrobenzene (1,3,5-TNB) PA 6885 10189807

1,3-Dinitrobenzene (1,3-DNB) PA 6160 10189807

2,4,6-Trinitrotoluene (2,4,6-TNT) PA 9651 10189807

2,4-Dinitrotoluene (2,4-DNT) PA 6185 10189807

2,6-Dinitrotoluene (2,6-DNT) PA 6190 10189807

2-Amino-4,6-dinitrotoluene (2-am-dnt) PA 9303 10189807

2-Nitrotoluene PA 9507 10189807

3-Nitrotoluene PA 9510 10189807

4-Amino-2,6-dinitrotoluene (4-am-dnt) PA 9306 10189807

4-Nitrotoluene PA 9513 10189807

Methyl-2,4,6-trinitrophenylnitramine (tetryl) PA 6415 10189807

Nitrobenzene PA 5015 10189807

Nitroglycerin PA 6485 10189807

Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) PA 9522 10189807

Pentaerythritoltetranitrate (PETN) PA 9558 10189807

RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) PA 9432 10189807

Method

Analyte

EPA 9012AB Analyte ID Method ID

Total cyanide PA 1645 10193405

Method

Analyte

EPA 9045AB Analyte ID Method ID

pH PA 1900 10197805

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Texas Commission on Environmental Quality

Eurofins Lancaster Laboratories Environmental, LLC

2425 New Holland Pike Lancaster, PA 17601-5994

8/31/2017Expiration Date:

Certificate: T104704194-16-22

10/15/2016Issue Date:

NELAP - Recognized Laboratory Fields of Accreditation

These fields of accreditation supercede all previous fields. The Texas Commission on Environmental Quality urges customers to verify the laboratory's current accreditation status for particular methods and analyses.

Solid & Chemical MaterialsMatrix:

Method

Analyte

EPA 9050AB Analyte ID Method ID

Conductivity PA 1610 10198604

Method

Analyte

EPA 9060AB Analyte ID Method ID

Total Organic Carbon (TOC) PA 2040 10200201

Method

Analyte

EPA 9066AB Analyte ID Method ID

Total phenolics PA 1905 10200609

Method

Analyte

EPA 9071AB Analyte ID Method ID

n-Hexane Extractable Material (HEM) (O&G) PA 1803 10201204

Silica Gel Treated n-Hexane Extractable Material (SGT-HEM) PA 10220 10201204

Method

Analyte

EPA 9081AB Analyte ID Method ID

Cation exchange capacity PA 1560 10203404

Method

Analyte

EPA 9095AB Analyte ID Method ID

Paint Filter Liquids Test PA 10312 10204203

Method

Analyte

SM 2540 GAB Analyte ID Method ID

Residue-total (total solids) PA 1950 20005203

Method

Analyte

TCEQ 1005AB Analyte ID Method ID

Total Petroleum Hydrocarbons (TPH) PA 2050 90019208

Page 62 of 62