# Status Report on PFOA Emissions Reductions and D ata Summary for 20 1 1 DuPont Chambers Works Deepwater, New Jersey

Date: September 201 2 Project No.: 1898 6208 .1 2 001

URS Corporation

DuPont Chambers Wo rks Route 130 and Canal Road Deepwater, New Jersey 080236BStatus Report on PFOA Emissions Reductions and Data Summary for 2011 

### Table of Contents

StatusReportonPFOA2011

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# Table of Contents

1.0 Introduction

................................ ................................ ................................ ................. 1

2.0 Site Setting at Chambers Works

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

3.0 Data Analysis

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

4.0 Site Wastewater Treatment System Sampling and Results

................................ ........ 5 4.1 Sample Collection

................................ ................................ .............................. 5 4.2 Data Quality

................................ ................................ ................................ ....... 5 4.3 Chambers Works Wastewater Sampling Results

................................ ............... 5

5.0 Salem Canal Surface Water Sampling

................................ ................................ ........ 7 5.1.1 Sample Collection

................................ ................................ ................ 7 5.1.2 Data Quality

................................ ................................ ......................... 7 5.1.3 Salem Canal Results

................................ ................................ ............. 7

6 .0 Sanitary Water

................................ ................................ ................................ ............ 8 6.1.1 Sample Collection

................................ ................................ ................ 8 6.1.2 Data Quality

................................ ................................ ......................... 8 6.1.3 Results

................................ ................................ ................................ .. 8

7.0 References

................................ ................................ ................................ ................... 9
Figur es Figure 1 Site Location Map
Figure 2 662 Sample L ocation
Figure 3 662 Monthly Average for 2005 thru 201 1 ( lbs./ day)
Figure 4 662 Monthly Average for 20 1 1 ( lbs. /day)
Figure 5 Salem Canal Surface Water Sample Locations
Figure 6 Sanitary Water Sample Locati on

Tables

Table 1 Average Monthly PFOA Concentrations and Mass Loadings

Table 2 Surface Water Sampling Results

Table 3 Sanitary Water Sampling Results

Appendices Appendix A Summary of PFOA Results at 662 January

– December 20 1 16BStatus Report on PFOA Emissions Reductions and Data S ummary for 2011 Introduction

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# 1.0 Introduction

The DuPont Chambers Works manufacturing complex (site) in Salem County, New Jersey has been reducing emissions of perfluorooctanoic acid (PFOA) t o the environment through process improvements and source elimination. In 2003 , a comprehensive study on the environmental emissions from Chambers Works was conducted as part of a voluntary Letter of Intent (LOI) submitted by the Telomer Research Program to the United States Environmental Protection Agency (USEPA). The results of this study were reported to NJDEP and USEPA in the DuPont Telomer Manufacturing Sites: Environmental Assessment of PFOA Levels in Air and Water, September 2003 (DuPont, 2003). The study assessed surface

- water emissions to the Delaware River, conducted air dispersion modeling of potential sources, and assessed levels in groundwater and surface waters adjacent to the site. The 2003 report evaluated the results of the study using the West Virginia Screening Levels as established by the C8 Assessment of Toxicity Team (CATT) (West Virginia Department of Env ironmental Protection )

. The report showed that surface water and calculated fenceline air concentrations were well below the CATT established screening levels. In January 2005, Chambers Works implemented a sampling program to measure the effectiveness of the reduction efforts and to identify program areas that need additional focus. The focus of the sampling program was on wastewater emissions. In January 2006, DuPont committed to participate in the EPA 2010/15 PFOA Stewardship Program. Chambers Works is an important part of the DuPont commitment to reduce emissions of PFOA globally.

In 2007

, Chambers Works continued their emission reduction program resulting in a 9 5 % reduction in PFOA emissions from the site since 2000.

In 2008, Chambers Works continued to reduce emissions by implementing multiple reduction program s resulting in a >97% reduction since 2000

. Continuing through 201 1

, DuPont has maintained their commitment to reduce emissions. The sampling program has identified emissions at the process le vel . After investigating these sources, DuPont was able to l imit or further reduce sources that enter the
wastewater stream by implementing process modifications and updating operating procedures , resulting in a 99% reduction since 2000

. This data report compiles the data collected and summarizes data trends at the primary NJPDES permitted outfall DSN662. Ongoing investigations were conducted on the Salem Canal and p lant s anitary w ater

. D ata for these investigations are also reported here. This data report includes the following sections:

 Section 2.0 presents the site setting at Chambers Works

.

 Section 3.0 presents the data analysis

.6BStatus Report on PFOA Emissions Reductions and Data Summary for 2011 Introduction

StatusReportonPFOA2011

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###  Section 4.0 presents the wastewater treatment system sampling and results

.

 Section 5 .0 presents the Salem Canal sampling and results

.

 Section 6 .0 presents the sanitary water sampling and results

.6BStatus Report on PFOA Emissions Reductions and Data Summary for 2011 Site Setting at Chambers Works

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# 2.0 Site Setting at Chambers Works

DuPont Chambers Works, located in Deepwater, New Jersey near the Delaware Memorial Bridge, has manufactured a variety of industrial compounds over the pa st 95 years (see Figure 1). Today the site produces approximately 400 different products. The manufacturing site is approximately 600 acres, boun ded by a non

- manufacturing area which includes a DuPont owned and maintained wildlife habitat to the north, the Delaware River to the west, the Salem C anal to the south, and the Deepwater community to the east. Since the 1970s the site has operated a groundwater containment system. The most significant portion of the groundwater containment system is the Intercepto r Well System (IWS) that withdraws a monthly daily average of at least 1. 0 million gallons of groundwater from the underlying aquifers and pumps the water to the site wastewater treatment plant (WWTP) for treatment. The interceptor well system maintains an inward hydraulic gradient over most of the site to prevent off

- site migration of groundwater. As demonstrated by over twenty years of compliance monitoring under a NJPDES Discharge to Ground Water permit, operation of the interceptor well system ensures t hat groundwater on the site does not flow toward public

- water supply wells in the region. PFOA is associated with the following process areas at the site :

 Fluoroelastomers (DP P ) : PFOA is used as a polymerization aid in the manufacture of perfluoroelastomer s. In 2001, the use of PFOA in the standard fluoroelastomers was discontinued, and in 2004

, a carbon treatment system was installed to treat washwaters and process cleanouts for the specialty fluoroelastomer and perfluoroelastomer manufacturing process.

 Fl uorotelomers: PFOA is present in trace quantities as an unintended by

- product in portions of the fluorotelomer manufacturing process. Fluorot elomer chemistry is not made with PFOA, nor is PFOA added during fluoro telomer manufacture. The presence of PFOA in fluorotelomer intermediates

, while low

, is highly variable from not

- quantifiable to parts per million.

 Chambers Works WWTP: PFOA is present in trace quantities in some commercial wastewater streams. PFOA continues to be used as a processing aid by industr y and can also be present as an unintended by

- product in other waste
streams. PFOA was widely used in commercial products by some companies. A summary of the different sources and uses of PFOA can be found in Prevedouros, et al. (2006). In addition

, PFOA i s present in wastewaters from the Chambers Works on

- site landfill leachate and groundwater treatment system.

Since 2003

, many PFOA containing wastewater streams to the WWTP have been eliminated through treatment at the generation site or by finding an alt ernative
treatment.

 The on

- site Leveraged Analytical Services ( LAS ) processes some samples containing PFOA for analytical purposes.6BStatus Report on PFOA Emissions Reducti ons and Data Summary for 2011 Data Analysis

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# 3.0 Data Analysis

Analysis of PFOA in waste water was performed by the on

- site DuPont Leveraged Analytical Services ( formerly RA S) , Test America

– Denver (TA

- Denver), formerly STL

- Denver ; Axys Analytical, Critical Path Services (CP) ; and MPI Research Inc. (formerly Exygen Research, Inc. ) according to a laboratory Standard Operating Procedure (SOP). The analytical method utilizes a Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS). The analytical methodology for Chambers Works wastewater was updated in March 2006 (due to differences between MPI Research Inc. and DuPont LAS ) and June 2007 (to decrease sample run time by taki ng advantage of new “rapid resolution” columns from Agilent Technologies). Data collected prior to March 2006 employed a methodology typically used for the analysis of PFOA in drinking water. However, due to the complex matrix of the various Chambers Works wastewater streams, a more robust method was developed. Upgrades in March 2006 include a longer gradient to allow for better separation

, use of an internal standard (dual

- labeled 13C PFOA, M+2) to compensate for matrix effects

, and a higher column tempera ture to increase peak resolution. Upgrades made in June 2007 include the use of a shorter method and a rapid resolution column. This method has the same resolution as the old method and is cross validated by using a 3 x 3 x 3 matrix.

Th is method has been v alidated for the Chambers Works wastewater samples. The validation of the PFOA data is performed by a group of chemists who verify that hold times, matrix spikes, and all lab quality controls are followed. T he data is then certified and entered into an ele ctronic database

. The PFOA results in wastewater are presented in this report for comparison purposes and are believed to be adequate for showing overall PFOA emission reductions. T he LAS data has been used for all 2011 wastewater calculations of sample S p ot 662 in this report

. Samples from the s anitary water w ere analyzed by MPI Research Inc. T he Canal Intak e sample s w ere analyzed by TA

- Denver

. The weekly 662

- GRAB sample was analyzed by CP. All samples were collected and analyzed according to the DuPont Q uality Assurance Project Plan (QAPP) with Sampling and Analysis Plan (S AP) submitted in Appendix A of the Status Report on PFOA Emissions Reductions and Data Summary for 2007

, (DuPont, 2008 )

.6BStatus Report on PFOA Emissions Reductions and Data Summary for 2011 Site Wastewater Treatment System Sampling and Results

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# 4.0 Site Wastewater Treatment System Sampling and Results

4.1 Sample Co llection

The focus of th is sampling program is to measure wastewater emissions from the site

. The Chambers Works primary outfall consists of two NJPDES monitored discharge locations (Permit No. NJ0005100) . DSN001 measures the combination of the effluent fr om the WWTP (DSN662), non

- process area site stormwater, and non

- contact cooling
water. In September 2011, a new outfall location, DSN002, was put into service, replacing DSN001. D SN001 is now used only for stormwater per the recently renewed NJPDES permit. DSN662 (662) measures only treated effluent from the WWTP (see Figure 2).

DSN662 has been previously shown to be sta tistically equivalent to D SN001 ( DuPont
, 2006 ). A second check was conducted in May 2007 to confirm that the two outfalls were statistical ly equivalent. R esults from 662 are currently used to represent Chambers Works total wastewater emissions.

In 20 1 1

, the sampling program for PFOA at the site was to collect three samples a week; two 48 hour composite samples and a 72 hour composite sample while still collecting one grab sample every Monday. This 48, 48, 72 hour schedule enabled DuPont to pinpoint and understand process related spikes to identify the low

- level sources of PFOA to
wastewater a t the process level, which helped in reduction effo rts.


## 4.2 Data Quality
Sample location 662 is a NJPDES permitted monitoring location. Sample collection was straightforward and consistently achieved. Furthermore, accurate flow measurements can be recorded and are used to calculate lbs/day discharge rates.

All samples were collected, analyzed , and validated according to the QAPP/ SAP. At sample locations upstream of 662, particularly those associated with regional tanks, it

was , at times, more difficult to obtain a representative sample. The data from these in ternal locations were used for qualitative comparisons on relative contributions from the area. The data from the internal locations w as not accurate enough for quantitative
assessments. This upstream data is used strictly for internal evaluation and revie w and therefore not included in this report, but will be available upon request.


## 4.3 Chambers Works Wastewater Sampling Results
Table 1 shows the average monthly PFOA concentrations at 662 for the study period. The data presented from January 200 6 to December 20 1 1 is the calculated average monthly value based on 662 concentration measurements. The estimated mass loading s are based on the 662 flow measurements.6BStatus Report on PFOA Emissions Reductions and Data Summary for 2011 Site Wastewater T reatment System Sampling and Results

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### As shown in Table 1, average daily discharge of PFOA from Chambers Works wastewater treatment plant d ecreased significantly from 200 6 to 201 1

. The actual a verage daily discharge in 20 1 1 was 0. 6 8 lbs. /day

. Figure 3 shows the reduction in lbs

. /day from 2006 thru 20 1 1

. This figure shows the lbs/day discharge rates of 0. 6 8 lbs. /day

. Figure 4 plots the month ly average PFOA concentrations at 662 for 20 1 1

. The actual 20 1 1 discharge is 24 5 .7 lbs ./ year

. The 662 data t ables are located in Appendix A

.6BStatus Report on PFOA Emissions Reductions and Data Summary for 2011 Salem Canal Surface Water Sampling

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# 5.0 Salem Canal Surface Water Sampling

5.1.1 Sample Collection
Quarterly samples were collected to track PFOA in the plant intake. Samples were collected from the plant intake (Canal Intake) a s shown on F igure 5

. Samples were collected from Canal Intake location by using a programmable sampler (ISCO). The sampler is programmed to collect a sample every hour for a 24

- hour perio d on the last Friday of the quarter

. Four samples were collected and submitted to TA

- Denver for analysis.

5.1.2 Data Quality
Sample collection was straightforward and consistently achieved. All samples were collected, analyzed, and validated according to the QA PP/ SAP

. Samples from the Canal Intake location were analyzed for PFOA by T A

- Denver.

5.1.3 Salem Canal Results

Surface Water Results
Results from th e surface water sampling appear in Table 2 , and show that during this monitoring period, the surface water concen trations of PFOA in the Salem Canal ranged from 0. 04 52 ug/L to 0.0 822 ug/L.6BStatus Report on PFOA Emissions Reductions and Data Summary for 2011 Sanitary Water

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# 6.0 Sanitary Water

The plant sanitary water supply is pulled from the Salem Canal and treated at the on

- site water treatment plant ( PWS ID # NJ1708300 ). Water from Salem Canal is trea ted for solids, iron

, and bacteria , followed by two bed s of granular activated carbon (GAC) in series for Trihalomethanes (THM’s) removal prior to distribution to the plant.

6.1.1 Sample Collection
Samples were collected from the a fter c arbon location by using a programmable sampler ( see Figure 6 ). The sampler is programmed to collect a sample every hour for a 24

- hour period

. Forty

- nine s amples were collected and submitted to MPI Research Inc. for analysis. Three sample s w ere not collected during the year due to sampler malfunctions

, and frozen sample ports

.

6.1.2 Data Quality
Samples from the a fter c arbon location were analyzed for PFOA by MPI Research Inc

. . Sample collection was straightforward and consistently achieved. All samples were collected, analyzed, and val idated according to the QAPP/ SAP.

6.1.3 Results
Results from sanitary sampling are presented in Table 4

. During the 20 1 1 sampling, PFOA concentrations in the treated After Carbon samples ranged from N D ( 0.00 1 8 ug/L )
to 0. 074 ug/L. The 20 1 1 average was 0.0 1 5 ug / L.6BStatus Report on PFOA Em issions Reductions and Data Summary for 2011 References

StatusReportonPFOA2011

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# 7.0 References

DuPont. 2008. PFOA Surface Water Emissions Reductions Status Report and Data Summary. May 2007, DuPont CRG Project No. 508501/ 509171

- 18983843/ 18985386. June 2008

DuPont. 200 7

. PFOA Surface Water Emissions Reductions Status Report and Data Summary. May 2006, DuPont CRG Project No. 508501

- 18983843. June 200 7

DuPont. 2003. DuPont Telomer Manufacturing Sites: Environmental Assessment of PFOA Levels in Air and Water, September 2003, DuPont CRG Project No. 508501

- 18983843. 2003.

Prevedouros, Kon stantinos, Ian T. Cousins, Robert C. Buck, and Stephen Korzeniowski. 2006. Sources, Fate and Transport of Perfluorocarboxylates, Environmental Science and Technology, Vol. 40, No. 1., 2006.

West Virginia Department of Environmental Protection. 2002a. C8 As sessment of Toxicity Team (CATT) Aquatic Life Advisory concentration for C8, October 2002.

______. 2002b. Final Ammonium Perfluoroctanoate (C8) Assessment of Toxicity (CATT) Report, August 2002.

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2U:\Chambers_Works\CAD\Project\18986014 - PFOA Report-2010 (McGee)\Drawings\FIG. 2.dwg, 5/9/2011 9:25:33 AM, DWG To PDF.pc3Figure 3662 Averages by Month (Jan 2006 - Dec 2011)Status Report on PFOA Emissions Reductions and DataSummary for 2011DuPont Chambers WorksDeepwater, New Jersey012345678J...F...M...A...M...J...J...A...S...O...N...D...Yearlbs/dayMonth662 Monthly Average lbs/Day (2006-2011)2011 = 0.68 lbs/ day2010 = 1.18 lbs/day2009 = 0.92 lbs/day2008 = 2.21 lbs/day2007 = 3.90 lbs/day2006 = 4.87 lbs/dayFigure 4 – 662 Monthly Average for 2011 (lbs/day)2011Actual0.68 lbs/day245.7 lbs/yearand Data Summary-201 1

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# TABLESTable 1 Average Monthly PFOA Concentrations and Mass Loadings Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey

DSN662 Conc. Estimated

Mass DSN662 Conc. Estimated

Mass ug/L lbs/day ug/L lbs/day 2006 6-Jan 26 3.74 2009 9-Jan 3.5 0.3

6-Feb 27.7 3.15 9-Feb 4.1 0.36 6-Mar 36.2 3.54 9-Mar 4.4 0.36 6-Apr 51 5.51 9-Apr 5.7 0.45 6-May 39 3.29 9-May 8.2 0.69 6-Jun 55.8 4.17 9-Jun 13.4 1.1 6-Jul 40 4.43 9-Jul 10.8 0.8 6-Aug 70 5.62 9-Aug 10.7 0.89 6-Sep 66 7.57 9-Sep 12.5 0.97 6-Oct 58 5.28 9-Oct 14.4 1.25 6-Nov 98 6.76 9-Nov 21.2 1.69* 6-Dec 39 4.1 9-Dec 28.4 2.39* 2007 7-Jan 66.3 6.48 2010 10-Jan 18.08 1.82

7-Feb 56.8 5.39 10-Feb 9.53 0.91 7-Mar 65.3 6.26 10-Mar 14.42 1.33 7-Apr 44.6 4.47 10-Apr 9.59 0.85 7-May 30.9 2.74 10-May 8.75 0.75 7-Jun 41.2 3.59 10-Jun 15 1.17 7-Jul 24.3 2.35 10-Jul 25.35 2.12 7-Aug 31.1 3.01 10-Aug 12.3 0.98 7-Sep 58.1 4.48 10-Sep 10.53 0.87 7-Oct 40.6 3.71 10-Oct 16.94 1.1 7-Nov 20.3 1.9 10-Nov 7.35 0.55 7-Dec 23.5 2.33 10-Dec 18.56 1.47 2008 8-Jan 30.3 3.01 2011 11-Jan 25.29 2.11

8-Feb 41.8 4.2 10-Feb 10.5 0.86 8-Mar 43.1 4.12 10-Mar 10.29 0.84 8-Apr 18.6 1.72 10-Apr 8.41 0.68 8-May 18.1 1.7 10-May 5.72 0.45 8-Jun 30.4 2.87 10-Jun 6.35 0.48 8-Jul 25.1 2.49 10-Jul 4.35 0.35 8-Aug 21.1 1.99 10-Aug 5.05 0.43 8-Sep 19.2 1.7 10-Sep 7.02 0.51 8-Oct 13.1 1.19* 10-Oct 4.38 0.34 8-Nov 10.2 0.86* 10-Nov 4.63 0.37 8-Dec 7.6 0.69* 10-Dec 4.19 0.33 * Limited production. Year Month Year Month

Page 1 of 1 Table 1_Avg Mthly Concent & Mass Loadings.xlsx 6/26/2012Table 2 Surface Water Sampling Results for 2011 Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey

Location CANAL INTAKE CANAL INTAKE CANAL INTAKE CANAL-INTAKE Total (T)/ Date 3/25/11 6/24/11 12/28/11 9/30/11 Lab Name Analyte Units Diss. (D) Duplicate FS FS FS FS TAL-QES-DEN PFOA UG/L T 0.0806 J 0.0452 0.0822 0.058

J = Estimated Value Page 1 of 1 Table 2-3_PFOA Tables_2011 (Envistadata).xls:Table 2-SW-Canal 6/26/2012: 3:01 PMTable 3 Sanitary Water Sampling Results for 2011 Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey
Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 1/5/11 1/5/11 1/19/11 1/19/11 1/26/11 1/26/11 2/2/11 2/2/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T 0.018 0.018 0.026 0.024 NQ (<0.014) NQ (<0.014) 0.022 0.025

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 2/9/11 2/9/11 2/16/11 2/16/11 2/23/11 2/23/11 3/2/11 3/2/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T 0.023 0.024 0.028 0.026 0.015 0.016 0.018 0.016

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 3/9/11 3/9/11 3/16/11 3/16/11 3/23/11 3/23/11 3/30/11 3/30/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T NQ (<0.015) NQ (<0.015) 0.019 0.02 0.021 0.019 NQ (<0.015) NQ (<0.015)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 4/6/11 4/6/11 4/13/11 4/13/11 4/20/11 4/20/11 4/27/11 4/27/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T NQ (<0.015) NQ (<0.015) NQ (<0.015) NQ (<0.015) 0.016 0.016 ND (0.0029) ND (0.0029)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 5/4/11 5/4/11 5/11/11 5/11/11 5/18/11 5/18/11 5/25/11 5/25/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T NQ (<0.017) NQ (<0.017) NQ (<0.017) NQ (<0.017) 0.021 0.023 NQ (<0.017) NQ (<0.017)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 6/1/11 6/1/11 6/8/11 6/8/11 6/15/11 6/15/11 6/22/11 6/22/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T NQ (<0.017) NQ (<0.017) 0.031 0.03 0.072 0.074 ND (0.0034) ND (0.0034)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 6/29/11 6/29/11 7/6/11 7/6/11 7/13/11 7/13/11 7/20/11 7/20/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T ND (0.0034) ND (0.0034) 0.033 0.032 ND (0.0034) ND (0.0034) NQ (<0.017) NQ (<0.017)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 7/27/11 7/27/11 8/3/11 8/3/11 8/10/11 8/10/11 8/17/11 8/17/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T ND (0.0034) ND (0.0034) ND (0.0018) ND (0.0018) NQ (<0.0092) NQ (<0.0092) NQ (<0.0092) NQ (<0.0092)

< and ND = Non detect at stated reporting limit NQ = Not Quatified at the stated reporting limit Page 1 of 2 Table 2-3_PFOA Tables_2011 (Envistadata).xls:Table 3_Aftercarbon 6/26/2012: 3:01 PMTable 3 Sanitary Water Sampling Results for 2011 Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey
Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 8/24/11 8/24/11 8/31/11 8/31/11 9/7/11 9/7/11 9/14/11 9/14/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T ND (0.0018) ND (0.0018) ND (0.0018) ND (0.0018) NQ (<0.0092) NQ (<0.0092) NQ (<0.0092) NQ (<0.0092)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 9/21/11 9/21/11 9/28/11 9/28/11 10/5/11 10/5/11 10/12/11 10/12/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T 0.016 0.017 ND (0.0018) ND (0.0018) ND (0.0022) ND (0.0022) NQ (<0.011) NQ (<0.011)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 10/19/11 10/19/11 10/26/11 10/26/11 11/2/11 11/2/11 11/16/11 11/16/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T 0.011 0.011 NQ (<0.011) NQ (<0.011) NQ (<0.0092) ND (0.0018) 0.018 0.021

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 11/23/11 11/23/11 11/30/11 11/30/11 12/7/11 12/7/11 12/14/11 12/14/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T 0.014 0.014 NQ (<0.0092) NQ (<0.0092) NQ (<0.015) NQ (<0.015) NQ (<0.015) NQ (<0.015)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Total (T)/ Date 12/21/11 12/21/11 12/28/11 12/28/11 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS MPI PFOA UG/L T NQ (<0.015) NQ (<0.015) NQ (<0.015) NQ (<0.015)

< and ND = Non detect at stated reporting limit NQ = Not Quatified at the stated reporting limit Page 2 of 2 Table 2-3_PFOA Tables_2011 (Envistadata).xls:Table 3_Aftercarbon 6/26/2012: 3:01 PM

# APPENDIX A DATA TABLESAppendix A Summary of PFOA Results at 662 January - December 2011 Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 1/3/2011 1/5/2011 1/7/2011 1/10/2011 1/12/2011 1/14/2011 1/17/2011 1/19/2011 1/21/2011 1/24/2011 1/26/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 36 19 20 27 25 56 29 15 30 38 22

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 1/28/2011 1/31/2011 2/2/2011 2/4/2011 2/7/2011 2/9/2011 2/11/2011 2/14/2011 2/16/2011 2/18/2011 2/21/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 18 12 12 10 10 14 16 14 15 15 9

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 2/23/2011 2/25/2011 2/28/2011 3/2/2011 3/4/2011 3/7/2011 3/9/2011 3/11/2011 3/14/2011 3/16/2011 3/18/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 7 6 6 5 7 5 5 5 7 8 10

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 3/21/2011 3/23/2011 3/25/2011 3/28/2011 3/30/2011 4/1/2011 4/4/2011 4/6/2011 4/8/2011 4/11/2011 4/13/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 15 26 15 10 10 10 9 10 10 9 8

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 4/15/2011 4/18/2011 4/20/2011 4/22/2011 4/25/2011 4/27/2011 4/27/2011 5/2/2011 5/4/2011 5/6/2011 5/9/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 8 7 7 9 9 7 5 6 5 7 5

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 5/11/2011 5/13/2011 5/16/2011 5/18/2011 5/20/2011 5/23/2011 5/25/2011 5/27/2011 5/30/2011 6/1/2011 6/3/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 5 8 7 7 7 6 4 4 6 5 8

Data is generated from DuPont RAS Page 1 of 4 App_A_2011_LAS 662 data.xlsx 6/26/2012Appendix A Summary of PFOA Results at 662 January - December 2011 Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 6/6/2011 6/8/2011 6/10/2011 6/13/2011 6/15/2011 6/17/2011 6/20/2011 6/22/2011 6/24/2011 6/27/2011 6/29/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 8 7 7 8 8 6 6 5 5 5 6

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 7/1/2011 7/4/2011 7/6/2011 7/8/2011 7/11/2011 7/13/2011 7/15/2011 7/18/2011 7/20/2011 7/22/2011 7/25/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 5 6 4 4 4 5 5 5 5 3 4

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 7/27/2011 7/29/2011 8/1/2011 8/3/2011 8/5/2011 8/8/2011 8/10/2011 8/12/2011 8/15/2011 8/17/2011 8/19/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 4 3 4 4 4 4 4 6 8 5 7

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 8/22/2011 8/24/2011 8/26/2011 8/29/2011 8/31/2011 9/2/2011 9/5/2011 9/7/2011 9/9/2011 9/12/2011 9/14/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 5 4 4 5 7 8.8 8 5 6 7 7

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 9/16/2011 9/19/2011 9/21/2011 9/23/2011 9/26/2011 9/28/2011 9/30/2011 10/3/2011 10/5/2011 10/7/2011 10/10/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 8 10 9 8 6 6 4 4 4 4 4

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 10/12/2011 10/14/2011 10/17/2011 10/19/2011 10/21/2011 10/24/2011 10/26/2011 10/28/2011 10/31/2011 11/2/2011 11/4/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 4 4 4 4 5 6 5 6 5 6 7

Data is generated from DuPont RAS Page 2 of 4 App_A_2011_LAS 662 data.xlsx 6/26/2012Appendix A Summary of PFOA Results at 662 January - December 2011 Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 11/7/2011 11/9/2011 11/11/2011 11/14/2011 11/16/2011 11/18/2011 11/21/2011 11/23/2011 11/25/2011 11/28/2011 11/30/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 5 5 5 5 4 4 3 4 5 5 4

Sample CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 CWK-662 Total (T)/ Date 12/2/2011 12/5/2011 12/7/2011 12/9/2011 12/12/2011 12/14/2011 12/16/2011 12/19/2011 12/21/2011 12/23/2011 12/26/2011 Analyte Units Diss (D) Duplicate 1 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 4 5 4 4 6 5 5 4 2 4 5

Sample CWK-662 CWK-662 Total (T)/ Date 12/28/2011 12/30/2011 Analyte Units Diss (D) Duplicate 1 1 PFOA ug/L T 4 5

Sample 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Total (T)/ Date 1/3/2011 1/10/2011 1/17/2011 1/24/2011 1/31/2011 2/7/2011 2/14/2011 2/21/2011 2/28/2011 3/7/2011 3/14/2011 Analyte Units Diss (D) Duplicate FS FS FS FS FS FS FS FS FS FS FS PFOA ug/L T 26.6 J 21.4 J 21.7 J 24.8 J 10 8 10 7 5 5 7

Sample 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Total (T)/ Date 3/21/2011 3/28/2011 4/4/2011 4/11/2011 4/18/2011 4/25/2011 5/5/2011 5/9/2011 5/16/2011 5/23/2011 5/23/2011 Analyte Units Diss (D) Duplicate FS FS FS FS FS FS FS FS FS DUP FS PFOA ug/L T 18 8 7 7 6 7 4 5.89 J 4.99 J 3.97 J 5.19 J

Sample 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Total (T)/ Date 5/30/2011 6/6/2011 6/13/2011 6/20/2011 6/27/2011 7/4/2011 7/11/2011 7/18/2011 7/25/2011 8/1/2011 8/8/2011 Analyte Units Diss (D) Duplicate FS FS FS FS FS FS FS FS FS FS FS PFOA ug/L T 11 7.11 J 7 5 4 7 4 4 3 4 3

Data is generated from DuPont RAS Page 3 of 4 App_A_2011_LAS 662 data.xlsx 6/26/2012Appendix A Summary of PFOA Results at 662 January - December 2011 Status Report on PFOA Emissions Reductions and Data Summary for 2011 DuPont Chambers Works Deepwater, New Jersey

Sample 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Total (T)/ Date 8/15/2011 8/22/2011 8/29/2011 9/5/2011 9/12/2011 9/19/2011 9/26/2011 10/3/2011 10/10/2011 10/17/2011 10/24/2011 Analyte Units Diss (D) Duplicate FS FS FS FS FS FS FS FS FS FS FS PFOA ug/L T 7 4 6 11 7 9 6 6 4 3 9

Sample 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Total (T)/ Date 10/31/2011 11/7/2011 11/14/2011 11/21/2011 11/28/2011 12/5/2011 12/12/2011 12/19/2011 12/26/2011 Analyte Units Diss (D) Duplicate FS FS FS FS FS FS FS FS FS PFOA ug/L T 4 5 7 4 13 3 5 2 4

Data is generated from DuPont RAS Page 4 of 4 App_A_2011_LAS 662 data.xlsx 6/26/2012