# Status Report on PFOA Emissions Reductions And Data Summary for 2010 DuPont Chambers Works Deepwater, New Jersey

Date: September 2011 Project No.: 18986014.11001

URS Corporation

DuPont Chambers Works Route 130 and Canal Road Deepwater, New Jersey 08023Status Report on PFOA

Emissions Reductions And Data Summary for 2010 Table of Contents

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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 Trea tment 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 Sale m Canal Surface Water Sampling

................................ ................................ ........ 6

5.1.1 Sample Collection

................................ ................................ ................ 6 5.1.2 Data Quality

................................ ................................ ......................... 6 5.1.3 Salem Canal Results

................................ ................................ ............. 6

6.0 Sanitary Water

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

6.1.1 Sample Collection

................................ ................................ ................ 7 6.1.2 Data Quality

................................ ................................ ......................... 7 6.1.3 Results

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

7.0 References

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

Figures Figure 1 Site Location M ap Figure 2 662 Sample Location Figure 3 662 Monthly Average for 2005 thru 2010 ( lbs. /day) Figure 4 662 Monthly Average for 20 10 (lbs

. /day) Figure 5 Salem Canal Surface Water Sample Locations Figure 6 Sanitary Water Sample Location

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 10Status Report on PFOA

Emissions R eductions And Data Summary for 2010 Introduction

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## 1.0 Introduction

The DuPont Chambers Works manufacturin g complex (site) in Salem County, New Jersey has been working towards 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 le vels 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 Environmental 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 reducti on 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 importan t 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 2010
, DuPont has maintained their commitment to reduce emissions. The sampling program has identified emissions at the process level . 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

. This data report compiles the data collected and summarizes data tren ds 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 presen ts the site setting at Chambers Works

. Section 3.0 presents the data analysis

.Status Report on PFOA

Emissions Reductions And Data Summary for 2010 Introduction

FINAL_StatusReportonPFOA2010

- 081211.doc 2 Deepwater, NJ 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 sa mpling and results

.Status Report on PFOA

Emissions Reductions And Data Summary for 2010 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 past 90 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 Interceptor Well System (IWS) that withdraws a monthly daily a verage 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 that groundwater on the site does not flow toward pub lic

- 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 specialty fluoroelastomers and perfluoroelastomers. In 2001, the use o f 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.

Fluorotelomers: PFOA is present in trace quantities as an unintended by

- product in portions of the fluorotelomer manufacturing process. Telomer chemistry is not made with PFOA, nor is PFOA added during telomer manufacture. The presence of PFOA in fluorotelomer intermediates
, whil e low
, is highly variable with concentrations ranging from not

- quantifiable to parts per million. Chambers Works Wastewater Treatment Plant (WWTP): PFOA is present in trace quantities in some commercial wastewater streams. PFOA continues to be used as
a pr ocessing aid by industry 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. (200 6). In addition
, PFOA is 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 si te or finding an alternative
treatment.

The on

- site Leveraged Analytical Services ( LAS ) processes some samples containing PFOA for analytical purposes.Status Report on PFOA

Emi ssions Reductions And Data Summary for 2010 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 S ervices ( formerly RAS) , Test America

– 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 ut ilizes 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 taking 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 Chambe rs 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 temperature 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 3x3x3 matrix.

Th is method has be en validated 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 electronic 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 20 10 wastewater calculations of sampl e spot 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 Test America

- Denver ( TA

- Denver ). The weekly 662

- GRAB sample was analyzed by Critical Path Services (CP). All samples we re collected and analyzed according to the DuPont Quality 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 )

.Status Report on PFOA

Emissions Reductions And Data Summary for 2010 Site Wastewater Treatment System Sampling and Results

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## 4.0 Site Wastewat er Treatment System Sampling and Results

4.1 Sample Collection

The focus of th is sampling program is to measure wastewater emissions from the Chambers Works Complex. The Chambers Works primary outfall consists of two NJPDES (Permit No. NJ0005100) monitored dis charge locations. DSN001 measures the combination of the effluent from the WWTP (DSN662), non

- process area site stormwater, and non

- contact cooling water. 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 statistically equivalent. R esults from 662 are currently used to represent Chambers Works total wastewater emissi ons.
In 20 10
, 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 pin point and understand process related spikes to identify the low

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



### 4.2 Data Quality

Sample location 662 is a NJPDES permitted monitoring location. Sample collection was

s traightforward 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 upstre am of 662, it was significantly more difficult to obtain a representative sample. This upstream data is available upon request.



### 4.3 Chambers Works Wastewater Sampling Results

Table 1 shows the average monthly PFOA concentrations at 662 for the study period. Th e data presented from January 200 6 to December 20 10 is the calculated average monthly value based on 662 concentration measurements. The estimated mass loading s are based on the 662 flow measurements.
As shown in Table 1, average daily discharge of PFOA f rom Chambers Works wastewater treatment plant decreased significantly from 200 6 to 2010

. The actual a verage daily discharge in 20 10 was 1

. 18 lbs. /day

. Figure 3 shows the reduction in lbs/day from 2006 thru 20 10

. This figure shows the lbs/day discharge rat es of 1. 18 lbs. /day

. Figure 4 plots the monthly average PFOA concentrations at 662 for 20 10

. The actual 20 10 discharge is 431 lbs. / year

. The 662 data t ables are located in Appendix A

.Status Report on PFOA

Emissions Reductions And Data Summary for 2010 Salem C anal Surface Water Sampling

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## 5.0 Salem Canal Surface Water Sampling

5.1.1 Sample Collection
Quarterly sampl es 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 co llect a sample every hour for a twenty four hour period on the last Friday of the quarter

. Four samples were collected and submitted to Test America (TA

- Denver) for analysis.

5.1.2 Data Quality
Sample collection was straightforward and consistently achieved. Al l samples were collected, analyzed, and validated according to the QAPP/ SAP

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

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 concentrations of PFOA in the Salem Canal ranged from 0. 041 J μ g/L to 0.0 48 μg/L

.Status Report on PFOA

Emissions Reductions And Data Summary for 2010 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 treated 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 Sam ple 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 twenty four 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 validated according to the QAPP/ SAP.

6.1.3 Results
Results from sanitary sampling are presented in Table 4

. During the 20 10 sampling, PFOA concentrations in the treated After Carbon samples ranged from N D ( 0.00 38 μg/L )
to 0.1 μg/L

. The 20 10 average was 0.0 1 6 μg/L

.Status Report on PFOA

Emissions Reductions And Data Summary for 2010 References

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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, Konstantinos, 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 Assessment of Toxicity Team (CATT) Aquatic Life Advisory concentration for C8, October 2002.

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

## FiguresReductions, and Data Summary-2010

Surface Water Emissions Status Report on PFOA

2U:\Chambers_Works\CAD\Project\18986014 - PFOA Report-2010 (McGee)\Drawings\FIG. 2.dwg, 5/9/2011 9:25:33 AM, DWG To PDF.pc3

# 2006 2007 2008

2008 Ac tual 2.21 lbs /day 2007 Ac tual 3.90 lbs /day 2006 Ac tual 4.87 lbs /day 

# 2009*

2009 Ac tual 0.92 lbs/da y 

# Figur e 3

– 66 2 A

vera ges by Mo nt h (J an 20 06

– Dec 20 10 )

2010

2010 Ac tual 1.18 lbs/da y

*No t e: Th e i ncrease i n di scharges i n 2010 f r om 2009 l ev el s i s l argel y due t o t he r et urn of t he product i on uni t s t o f ul l opera t i o n. I n 2009

, product i on w as r educe d i n r espon se t o t he econo m i c r ecessi on. 2010 product i on l ev el s w ere si m i l ar t o 2008 l ev el s.Figure 4 – 662 Monthly Average for 2010 (lbs/day)2010 Actual1.18 lbs/day431 lbs/yearand Data Summary-2010

PFOA Emissions, Reductions, Status Report on

6U:\Chambers_Works\CAD\Project\18986014 - PFOA Report-2010 (McGee)\Drawings\FIG. 6.dwg, 5/9/2011 9:26:38 AM, DWG To PDF.pc3and Data Summary-2010

PFOA Emissions, Reductions, Status Report on

7U:\Chambers_Works\CAD\Project\18986014 - PFOA Report-2010 (McGee)\Drawings\FIG. 7.dwg, 5/9/2011 9:27:08 AM, DWG To PDF.pc3

## TablesTable 1 Concentrations and Mass Loadings Status Report on PFOA Emissions Reductions and Data Summary for 2010 DuPont Chambers Works Deepwater, New Jersey

DSN662 Conc. Estimated

Mass μg/L lbs/day 2006 6-Jan 26 3.74

6-Feb 27.7 3.15 6-Mar 36.2 3.54 6-Apr 51 5.51 6-May 39 3.29 6-Jun 55.8 4.17 6-Jul 40 4.43 6-Aug 70 5.62 6-Sep 66 7.57 6-Oct 58 5.28 6-Nov 98 6.76 6-Dec 39 4.1 2007 7-Jan 66.3 6.48

7-Feb 56.8 5.39 7-Mar 65.3 6.26 7-Apr 44.6 4.47 7-May 30.9 2.74 7-Jun 41.2 3.59 7-Jul 24.3 2.35 7-Aug 31.1 3.01 7-Sep 58.1 4.48 7-Oct 40.6 3.71 7-Nov 20.3 1.9 7-Dec 23.5 2.33 2008 8-Jan 30.3 3.01

8-Feb 41.8 4.2 8-Mar 43.1 4.12 8-Apr 18.6 1.72 8-May 18.1 1.7 8-Jun 30.4 2.87 8-Jul 25.1 2.49 8-Aug 21.1 1.99 8-Sep 19.2 1.7 8-Oct 13.1 1.19* 8-Nov 10.2 0.86* 8-Dec 7.6 0.69* 2009 9-Jan 3.5 0.3

9-Feb 4.1 0.36 9-Mar 4.4 0.36 9-Apr 5.7 0.45 9-May 8.2 0.69 9-Jun 13.4 1.1 9-Jul 10.8 0.8 9-Aug 10.7 0.89 9-Sep 12.5 0.97 9-Oct 14.4 1.25 9-Nov 21.2 1.69* 9-Dec 28.4 2.39* 2010 10-Jan 18.08 1.82

10-Feb 9.53 0.91 10-Mar 14.42 1.33 10-Apr 9.59 0.85 10-May 8.75 0.75 10-Jun 15 1.17 10-Jul 25.35 2.12 10-Aug 12.3 0.98 10-Sep 10.53 0.87 10-Oct 16.94 1.1 10-Nov 7.35 0.55 10-Dec 18.56 1.47 Year Month

* Limited Production Table 1_Conc_Mass LoadingsTable 2 Surface Water Sampling Results for 2010 Status Report on PFOA Emissions Reductions and Data Summary for 2010 DuPont Chambers Works Deepwater, New Jersey

Location CANAL INTAKE CANAL INTAKE CANAL INTAKE CANAL INTAKE
Lab Lab Total (T)/ Date 3/26/10 6/25/10 9/24/10 12/22/10
Name Analyte Units Diss. (D) Duplicate FS FS FS FS TAL-QES-DEN PFOA UG/L T 0.041 J 0.048 0.045 0.047

J = Estimated Value Page 1 of 1 PFOA Tables_2010 (Envistadata).xls:Table 2(Canal) 7/20/2011 2:52 PMTable 3 Sanitary Water Sampling Results for 2010 Status Report on PFOA Emissions Reductions and Data Summary for 2010 DuPont Chambers Works Deepwater, New Jersey

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 1/13/10 1/20/10 1/20/10 1/27/10 1/27/10 2/3/10 2/3/10 2/11/10 2/11/10 Name Analyte Units Diss. (D) Duplicate FS DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T 0.1 0.029 0.028 NQ (<0.018) NQ (<0.018) 0.02 0.021 0.023 0.024

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 2/17/10 2/17/10 2/24/10 2/24/10 3/3/10 3/3/10 3/10/10 3/10/10 3/17/10 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS DUP MPI PFOA UG/L T 0.024 0.025 NQ (<0.018) NQ (<0.018) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019) 0.02

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 3/17/10 3/24/10 3/24/10 3/31/10 3/31/10 4/7/10 4/7/10 4/14/10 4/14/10 Name Analyte Units Diss. (D) Duplicate FS DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T 0.019 ND (0.0038) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 4/21/10 4/21/10 4/28/10 4/28/10 5/5/10 5/5/10 5/12/10 5/12/10 5/19/10 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS DUP MPI PFOA UG/L T ND (0.0038) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019) 0.019 NQ (<0.019) NQ (<0.019)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 5/19/10 5/26/10 5/26/10 6/2/10 6/2/10 6/9/10 6/9/10 6/16/10 6/16/10 Name Analyte Units Diss. (D) Duplicate FS DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T NQ (<0.019) ND (0.0038) ND (0.0038) ND (0.0038) ND (0.0038) NQ (<0.019) NQ (<0.019) NQ (<0.019) NQ (<0.019)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 6/30/10 6/30/10 7/7/10 7/7/10 7/14/10 7/14/10 7/21/10 7/21/10 7/28/10 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS DUP MPI PFOA UG/L T 0.013 0.014 0.024 0.024 NQ (<0.012) NQ (<0.012) ND (0.0025) ND (0.0025) ND (0.0025)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 7/28/10 8/4/10 8/4/10 8/11/10 8/11/10 8/18/10 8/18/10 8/25/10 8/25/10 Name Analyte Units Diss. (D) Duplicate FS DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T ND (0.0025) ND (0.0025) ND (0.0025) NQ (<0.012) NQ (<0.012) NQ (<0.012) NQ (<0.012) ND (0.0025) ND (0.0025)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 9/1/10 9/1/10 9/8/10 9/8/10 9/15/10 9/15/10 9/22/10 9/22/10 9/29/10 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS DUP MPI PFOA UG/L T NQ (<0.018) NQ (<0.018) 0.02 0.019 NQ (<0.018) NQ (<0.018) ND (0.0036) ND (0.0036) NQ (<0.018)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 9/29/10 10/6/10 10/6/10 10/13/10 10/13/10 10/20/10 10/20/10 10/27/10 10/27/10 Name Analyte Units Diss. (D) Duplicate FS DUP FS DUP FS DUP FS DUP FS MPI PFOA UG/L T NQ (<0.018) NQ (<0.018) NQ (<0.018) 0.025 0.028 0.019 0.019 NQ (<0.018) NQ (<0.018)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 11/3/10 11/3/10 11/10/10 11/10/10 11/17/10 11/17/10 11/24/10 11/24/10 12/1/10 Name Analyte Units Diss. (D) Duplicate DUP FS DUP FS DUP FS DUP FS DUP MPI PFOA UG/L T NQ (<0.018) NQ (<0.018) NQ (<0.018) NQ (<0.018) NQ (<0.018) NQ (<0.018) ND (0.0036) ND (0.0036) NQ (<0.014)

Location AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON AFTERCARBON Lab Lab Total (T)/ Date 12/1/10 12/8/10 12/8/10 12/22/10 12/22/10 12/29/10 12/29/10 Name Analyte Units Diss. (D) Duplicate FS DUP FS DUP FS DUP FS MPI PFOA UG/L T NQ (<0.014) 0.016 0.015 0.014 0.014 NQ (<0.014) NQ (<0.014)

< and ND = Non Detect at stated reporting limit NQ = Not Quantified at the stated reporting limit Page 1 of 1 PFOA Tables_2010 (Envistadata).xls:Table 3(Sanitary) 7/20/2011: 2:52 PM

## Appendix A

Summary of PFOA Results at 662 January - December 2010Appendix A Summary of PFOA Results at 662 January – December 2010

Status Report on PFOA Emissions Reductions and Data Summary for 2010

DuPont Chambers Works Deepwater, New Jersey

Sample ID 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Date 1/11/10 1/18/10 1/25/10 2/1/10 2/8/10 2/15/10 2/22/10 3/1/10 3/8/10 3/15/10 Duplicate # 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 14.6 9.87 8.70 7.83 7.67 10.6 19.7 12.0 11.4 12.4

Sample ID 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Date 3/22/10 3/29/10 4/5/10 4/12/10 4/19/10 4/26/10 5/3/10 5/10/10 5/17/10 5/24/10 Duplicate # 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 19.6 8.52 10.3 11.2 10.5 7.70 6.43 11.8 9.30 6.54

Sample ID 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Date 6/1/10 6/7/10 6/14/10 6/21/10 6/28/10 7/6/10 7/12/10 7/19/10 7/26/10 8/2/10 Duplicate # 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 10.0 21.7 20.4 9.85 14.0 13.8 10.7 41.5 24.4 17.4

Sample ID 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Date 8/9/10 8/16/10 8/23/10 8/30/10 9/7/10 9/13/10 9/20/10 9/27/10 10/4/10 10/11/10 Duplicate # 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 14.8 14.2 10.0 14.8 13.0 12.9 8.28 12.4 15.6 35.4

Sample ID 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB 662-GRAB Date 10/18/10 10/25/10 11/1/10 11/8/10 11/15/10 11/22/10 11/29/10 12/6/10 12/13/10 12/20/10 Duplicate # 1 1 1 1 1 1 1 1 1 1 PFOA ug/L T 16.4 8.46 9.63 4.57 3.16 7.28 17.6 5.32 5.19 19.5

Sample ID 662-GRAB Date 12/27/10 Duplicate # 1 PFOA ug/L T 42.4

PFOA = Perfluorooctanoic Acid Samples were analyzed by Critical Path Services. Analyte Units Total (T)/

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