DuPont Corporate Remediation Group 

Chestnut Run Plaza 715-240 

974 Centre Road 

P.O. Box 2915 

Wilmington, DE 19805 

E.I. du Pont de Nemours and Company

April 22, 2015

Linda Range 

NJ Department of Environmental Protection 

CHMM, Site Manager 

Bureau of Case Management 

401 East State Street 

Mail Code 401-05F 

Trenton, NJ 08625-0028 

DuPont Chambers Works Complex 

NJPDES-DGW Permit No. NJ0083429 

PFOA Monitoring Program Groundwater Results 

Dear Ms. Range: 

As required by the NJPDES-DGW Permit No. NJ0083429, DuPont samples groundwater semiannually from 36 wells across the site for analysis of Perfluorooctanoic Acid (PFOA) and other 

perfluorinated compounds. DuPont sampled the wells in January 2015 in accordance with the 

sampling and analysis plan (SAP). The well locations are shown with results in Figure 1. 

PFOA was detected at varying concentrations ranging from not detected [ND (0.00099)] at well 

C11-M01E to 600 μg/L at well G09-M01A (see Table 1). The highest concentrations are located 

in the interior of the site where groundwater is contained by the Interceptor Well System. Table 2 

lists the other perfluorinated compounds. 

PFOA was detected at concentrations ranging from 0.24 to 50 μg/L in the B (shallow) aquifer 

along the western portion of the site where a component of groundwater flow is towards the 

Delaware River (see Figure 1). This occurrence is not expected to adversely affect the river 

based on previous studies of other compounds detected in groundwater in the area. 

If you have any questions, please contact me at 302-999-6197. 

Very truly yours, 

Andrew S. Hartten 

Project Director 

Corporate Remediation – NJ 

cc: Edward Lutz, DuPont 

Sin-Kie Tjho, EPA Region 2 

File: 507141 
Table 1

Summary of Analytical Results

PFOA Monitoring Program

Perfluorooctanic Acid (PFOA)

First Semester 2015

Chambers Works

Deepwater, New Jersey

Location F08-M01A G09-M01A K12-M01A C08-M01B C11-M03B D06-M01B D15-M01B F0

Sample Date 01/19/2015 01/19/2015 01/19/2015 01/28/2015 01/28/2015 01/26/2015 01/28/2015 01/

Aquifer A AA B B B B 

Analyte Units Sample Type 1 11 1 1 1 1 

PFOA UG/L 47 600 11 50 0.24 0.87 1 

Location J10-M02B K13-M02B K13-M02B L09-M01B N08-M01B P06-M01B P21-M01B R0

Sample Date 01/19/2015 01/12/2015 01/12/2015 01/29/2015 01/22/2015 01/21/2015 01/14/2015 01/

Aquifer B BB B B B B 

Analyte Units Sample Type 1 12 1 1 1 1 

PFOA UG/L 5.6 17 18 1.4 1.2 1.6 120 

Location G04-M01B L09-M01C N08-M01C P06-M02C P06-M02C R10-M01C Z28-M01B Z2

Sample Date 01/16/2015 01/29/2015 01/22/2015 01/21/2015 01/21/2015 01/20/2015 01/20/2015 01/

Aquifer C CC C C C C 

Analyte Units Sample Type 1 11 1 2 1 1 

PFOA UG/L 0.96 2 3.4 0.49 0.48 0.27 0.2 

Location J05-M01C L09-M01D N08-M01D P06-M01D AA22-M01B AA25-M01C C11-M01E G0

Sample Date 01/26/2015 01/29/2015 01/22/2015 01/21/2015 01/23/2015 01/20/2015 01/28/2015 01/

Aquifer D DD D D D E 

Analyte Units Sample Type 1 11 1 1 1 1 

PFOA UG/L 0.042 2.8 1.6 0.004 0.85 <0.0012 <0.00099 0

Notes:ND = Non detect at stated reporting limitPFOA = Perfluorooctanoic AcidSample Type 1 = Regular SampleSample Type 2 = Duplicate Sample

Page 1 of 1 1H
Table 2

Summary of Analytical Results

PFOA Monitoring Program

Perfluorooctanic Compounds

First Semester 2015

Chambers Works

Deepwater, New Jersey

Location F08-M01A G09-M01A K12-M01A C08-M01B C11-M03B D06-M01B D15-M01B F0

Sample Date 01/19/2015 01/19/2015 01/19/2015 01/28/2015 01/28/2015 01/26/2015 01/28/2015 01

Aquifer A AABBBB

Analyte Units Sample Type 1 111111

PFBA UG/L 71 92 0.1 16 0.095 0.27 0.21 PFBS UG/L <0.14 <0.98 <0.014 0.98 <0.0040 0.028 0.015 PFDA UG/L 9.2 43 0.7 2.3 0.16 0.32 0.22 PFDOA UG/L 0.08 <0.49 0.03 <0.031 0.02 0.02 0.0082 <PFHPA UG/L 7.2 150 0.48 4.1 0.16 0.53 0.4 PFHXA UG/L 70 690 0.37 61 0.31 1.2 0.92 PFHXS UG/L <0.14 <0.98 <0.014 <0.062 <0.0040 <0.0030 <0.0083 <PFNA UG/L 2.9 84 0.12 1.4 0.077 0.14 0.17 PFOS UG/L <0.14 <0.98 <0.014 0.066 0.01 0.013 0.027 <PFOSA UG/L <0.071 <0.49 <0.0071 <0.031 <0.0020 0.0017 0.0057 <PFPEA UG/L 9.6 100 0.28 3.7 0.18 0.49 0.34 PFUNA UG/L 0.33 <0.49 0.19 0.091 0.023 0.084 0.035 

Location K13-M02B L09-M01B N08-M01B P06-M01B P21-M01B R09-M02B R09-M02B C1

Sample Date 01/12/2015 01/29/2015 01/22/2015 01/21/2015 01/14/2015 01/19/2015 01/19/2015 01

Aquifer B BBBBBB 

Analyte Units Sample Type 2 111112

PFBA UG/L 5.8 0.18 0.38 0.38 64 0.59 0.57 PFBS UG/L 0.21 0.47 0.0096 0.0086 <0.97 <0.0099 <0.0099 0PFDA UG/L 0.36 0.26 0.073 0.045 0.97 0.27 0.24 PFDOA UG/L <0.10 <0.010 <0.0025 <0.0017 <0.49 <0.0050 <0.0049 PFHPA UG/L 5.1 0.65 0.52 0.65 58 0.8 0.8 PFHXA UG/L 29 1.2 1.2 1.2 300 1.7 1.6 PFHXS UG/L <0.20 <0.020 0.0058 <0.0033 <0.97 <0.0099 <0.0099 <PFNA UG/L 1.8 0.32 0.12 0.18 5.1 0.67 0.67 PFOS UG/L <0.20 <0.020 <0.0049 0.0066 <0.97 0.015 J 0.012 0PFOSA UG/L <0.10 <0.010 <0.0025 <0.0017 <0.49 <0.0050 <0.0049 <PFPEA UG/L 6.9 0.43 0.58 0.65 60 0.97 0.83 PFUNA UG/L <0.10 0.018 0.0048 <0.0017 <0.49 <0.0050 <0.0049 Notes: = Not detected at stated reporting limit PFBA = Perfluorobutanoic Acid PFHPA = Perfluoroheptanoic Acid Sample Type 1 = Regular Sample PFBS = Perfluorobutane Sulfonic Acid PFHXA = Perfluorohexanoic Acid Sample Type 2 = Duplicate Sample PFDA = Perfluorodecanoic Acid PFHXS = Perfluorohexane Sulfonic Acid J = Reported value may not be accurate or precise. PFDOA = Perfluorododecanoic Acid PFNA = Perfluorononanoic Acid UJ = Not detected. Reporting limit may not be accurate or precise.

Page 1 of 2 
Table 2

Summary of Analytical Results

PFOA Monitoring Program

Perfluorooctanic Compounds

First Semester 2015

Chambers Works

Deepwater, New Jersey

Location P06-M02C R10-M01C Z28-M01B Z28-M01B AA25-M01B C11-M02D J05-M01C L0

Sample Date 01/21/2015 01/20/2015 01/20/2015 01/20/2015 01/23/2015 01/28/2015 01/26/2015 01

Aquifer C CCCCDD

Analyte Units Sample Type 2 112111

PFBA UG/L 0.19 0.088 0.051 0.056 0.082 0.14 0.03 PFBS UG/L <0.0020 <0.0038 0.0028 <0.0025 <0.0019 0.017 <0.0019 PFDA UG/L 0.0097 0.0065 0.0018 0.0017 0.0036 0.087 0.006 PFDOA UG/L <0.00099 <0.0010 <0.0013 <0.0012 <0.00097 <0.0039 0.0021 <PFHPA UG/L 0.31 0.13 0.087 0.097 0.13 0.14 0.021 PFHXA UG/L 0.42 0.26 0.19 0.18 0.27 0.47 0.07 PFHXS UG/L 0.0033 <0.0020 0.0071 0.0073 0.0051 <0.011 <0.0019 <PFNA UG/L 0.049 0.021 0.021 0.019 0.023 0.98 0.002 PFOS UG/L 0.0084 0.0029 0.01 0.0086 0.0069 0.035 <0.0019 <PFOSA UG/L <0.00099 <0.0010 <0.0013 <0.0012 <0.00097 <0.0039 <0.00096 <PFPEA UG/L 0.26 0.13 0.075 0.09 0.14 0.13 0.047 PFUNA UG/L <0.00099 <0.0010 <0.0013 <0.0012 <0.00097 0.019 <0.00096 <

Location N08-M01D P06-M01D AA22-M01B AA25-M01C C11-M01E G04-M01E P06-M01E R1

Sample Date 01/22/2015 01/21/2015 01/23/2015 01/20/2015 01/28/2015 01/16/2015 01/16/2015 01

Aquifer D DDDEEE

Analyte Units Sample Type 1 111111

PFBA UG/L 0.68 0.0096 0.22 <0.0010 <0.00099 <0.0027 0.077 PFBS UG/L 0.047 <0.0020 0.0032 <0.0020 <0.0020 <0.0020 0.0079 <PFDA UG/L 0.071 <0.0010 0.019 <0.0010 <0.00099 <0.00098 <0.0010 <0PFDOA UG/L <0.0025 <0.0010 <0.0011 <0.0010 <0.00099 <0.00098 <0.0010 <0PFHPA UG/L 1.6 0.0052 0.48 <0.0010 <0.00099 0.001 0.057 PFHXA UG/L 1.6 0.011 0.68 <0.0010 <0.00099 0.0064 0.15 PFHXS UG/L 0.0069 <0.0020 0.0021 <0.0020 <0.0020 <0.0020 <0.0025 <PFNA UG/L 0.27 <0.0010 0.064 <0.0010 <0.00099 <0.00098 0.0022 <0PFOS UG/L 0.0075 J <0.0020 0.0061 <0.0020 <0.0020 <0.0020 <0.0020 <PFOSA UG/L <0.0025 <0.0010 <0.0011 <0.0010 <0.00099 <0.00098 <0.0010 <0PFPEA UG/L 1.2 0.0053 0.43 <0.0010 <0.00099 <0.0010 0.05 PFUNA UG/L 0.016 <0.0010 <0.0011 <0.0010 <0.00099 <0.00098 <0.0010 <0Notes: = Not detected at stated reporting limit PFBA = Perfluorobutanoic Acid PFHPA = Perfluoroheptanoic Acid Sample Type 1 = Regular Sample PFBS = Perfluorobutane Sulfonic Acid PFHXA = Perfluorohexanoic Acid Sample Type 2 = Duplicate Sample PFDA = Perfluorodecanoic Acid PFHXS = Perfluorohexane Sulfonic Acid J = Reported value may not be accurate or precise. PFDOA = Perfluorododecanoic Acid PFNA = Perfluorononanoic Acid UJ = Not detected. Reporting limit may not be accurate or precise.

Page 2 of 2 
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