2017 Annual Monitoring Report Area E (PICA-077) Groundwater and Surface Water

Transcription

1 , New Jersey Prepared for Prepared by EA Engineering, Science, and Technology, Inc., PBC. Contract No. W91ZLK-13-D December 2017

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3 Area E (PICA-077) Groundwater and Surface Water, New Jersey Prepared for U.S. Army Prepared by EA Engineering, Science, and Technology, Inc., PBC 225 Schilling Circle, Suite 400 Hunt Valley, Maryland (410) Frank DeSantis Jr. Project Manager 21 December 2017 Date James Costello Deputy Program Manager 21 December 2017 Date December 2017 EA Project No

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5 EA Project No Page i EA Engineering, Science, and Technology, Inc., PBC December 2017 TABLE OF CONTENTS Page LIST OF FIGURES... ii LIST OF TABLES... ii LIST OF ACRONYMS AND ABBREVIATIONS... iii INTRODUCTION... 1 SAMPLING ACTIVITIES GROUNDWATER ELEVATION MEASUREMENTS COMPLIANCE MONITORING DATA VALIDATION AND USABILITY... 5 RESULTS GROUNDWATER ELEVATIONS ANALYTICAL RESULTS EVALUATION OF DATA TRENDS Upgradient Site Boundary Plume Center/Fringe Monitoring Wells Downgradient Site Boundary and Adjacent to Green Pond Brook Green Pond Brook...36 REMEDY PERFORMANCE AND FUTURE ACTIONS REFERENCES APPENDIX A: FIELD FORMS (PROVIDED ON CD) APPENDIX B: ANALYTICAL DATA REPORTS (PROVIDED ON CD) APPENDIX C: TREND PLOTS

6 EA Project No Page ii EA Engineering, Science, and Technology, Inc., PBC December 2017 LIST OF FIGURES Number Title 1 Area E (PICA-077) Site Location 2 Area E (PICA-077) Monitoring Well Network, and Surface Water Sample Locations Groundwater Elevation Contour Map 4 PCE Groundwater and Surface Water Concentrations Map 5 TCE Groundwater and Surface Water Concentrations Map 6 1,1-DCE Groundwater and Surface Water Concentrations Map 7 VC Groundwater and Surface Water Concentrations Map LIST OF TABLES Number Title 1 Monitoring Program Schedule (through 2020) 2 Well Specification and Groundwater Elevation Summary 3 Historical Groundwater Sampling Results 4 Groundwater and Surface Water Field Parameters 5 Historical Surface Water Sampling Results 6 Surface Water Discharge Data Summary for Green Pond Brook

7 EA Project No Page iii EA Engineering, Science, and Technology, Inc., PBC December 2017 LIST OF ACRONYMS AND ABBREVIATIONS μg/l ARCADIS COC DCE DO EA ft LUC MNA NJDEP NJGWQS ORP PCE PDB PICA SWQC TCE USACE USAEC USEPA VC VOC Microgram(s) per liter ARCADIS U.S., Inc. Contaminant of concern Dichloroethene Dissolved oxygen EA Engineering, Science, and Technology, Inc., PBC Foot (feet) Land use control Monitored natural attenuation New Jersey Department of Environmental Protection New Jersey Groundwater Quality Standards Oxidation reduction potential Tetrachloroethene Passive diffusion bag Surface Water Quality Criteria Trichloroethene United States Army Corps of Engineers United States Army Environmental Command United States Environmental Protection Agency Vinyl chloride Volatile organic compound

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9 EA Project No Page 1 EA Engineering, Science, and Technology, Inc., PBC December 2017 INTRODUCTION EA Engineering, Science, and Technology, Inc., PBC (EA) has been retained by the United States Army Environmental Command (USAEC) to perform Installation Restoration Program activities at (PICA), located in. This work is being performed under the Environmental Remediation Multiple Award Indefinite Delivery/Indefinite Quantity Contract W91ZLK-13-D-0004 Delivery Order 0009, and will be overseen by the USAEC and the United States Army Corps of Engineers (USACE) for PICA, under approval by the New Jersey Department of Environmental Protection (NJDEP), and United States Environmental Protection Agency (USEPA) Region 2. Field activities are being conducted by EA s subcontractor Sovereign Consulting, Inc. (Sovereign). Area E (PICA-077) is approximately 38 acres in size and is located in the south-central portion of PICA (Figure 1). Area E groundwater is predominantly impacted by waste disposal practices associated with metal plating operations involving the use of degreasing and cleaning with chlorinated solvents at Sites 22, the former surface impoundment unit and Site 38, Building 95 (Figure 2) from the 1960s through the mid-1970s. Contaminants of concern (COCs) identified at the site include the following: tetrachloroethene (PCE), trichloroethene (TCE), cis-1,2- dichloroethene (DCE), 1,1-DCE, and vinyl chloride (VC). As stated within the Record of Decision (U.S. Army 2007) the primary response actions for Area E include the following: Demonstration of monitored natural attenuation (MNA) through the implementation of long-term groundwater and surface water monitoring, primarily for natural attenuation parameters, to verify the progress of natural attenuation. Implementation of land use controls (LUCs) to ensure protectiveness. The LUCs include land use and access restrictions, public education, and emergency provisions throughout the entire duration of MNA. The LUCs and annual evaluations will be documented in the 2017 Annual Land Use Certification and No Further Action Site Monitoring Report, submitted under separate cover. The MNA program has been designed to evaluate long-term behavior of the plume, verify that exposure to contaminants and their breakdown products does not pose additional risks, and assess whether it is necessary to implement any contingency actions. This Annual Monitoring Report discusses the actions taken in implementation of the MNA groundwater remedy at Area E. The following activities are addressed in this report: Annual groundwater and surface water sampling Collection of additional groundwater samples as per the planned biennial groundwater sampling. The monitoring schedule for Area E is shown in Table 1.

10 ³ Morris County Sussex County ^_ NJ Area E Boundary County Boundary 0 2 Miles Service Layer Credits: Sources: Esri, HERE, DeLorme, USGS, Intermap, increment P Corp., NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), MapmyIndia, 2017 ANNUAL REPORT AREA E (PICA-077) PICATINNY ARSENAL Figure 1 Area E (PICA-077) Site Location

11 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 3 October 2017 Calendar Year Operation Year Table 1 Monitoring Program Schedule (Through 2020) Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Site Name Category Media Purpose Schedule Sample Locations Sampling Method 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th E-80-3, E-82-1 MNA VOC Groundwater Sampling Groundwater Evaluate MNA for groundwater remedy across Area E Yr: 1-2 quarterly Yr 3-5: semi-annually Yr 6-duration annually E E E-12-H, E-12-L E-70-4, E-3WG-2 E-11WG-1, E-1 2 E-2, E-12A 1 Passive Diffusion Bag 2007 First Year of Operation Second Year of Operation Third Year of Operation Fourth Year of Operation Fourth Continued Completed Completed Completed Complete Complete Complete Complete Complete Complete Completed Completed Completed Completed Completed Completed 2011 Fifth Year of Operation 2012 Sixth Year of Operation 77 Area E Biennial Groundwater Comprehensive, include these locations with MNA VOC Biennial E-18-1, E-80-1, E-80-2 E-80-3, E-82-1, E-82-2 E-82-3, E-95-3, E-MW-11 E-12-D, E-12-H, E-12-K E-12-L, E-70-2, E-70-3 E-70-4, E-3WG-1, E-3WG-2 E-3WG-3, E-11WG-1, E-11WG-1 E-11WG-2, E-11WG-3 Passive Diffusion Bag Completed Complete Completed Surface Water Sampling Surface Water SW sampling as Yr: 1-2 quarterly part of the Yr 3-5: semi-annually groundwater MNA Yr 6-duration annually remedy D-SW-5 E-38SW-1 E-38SW-4 Grab Sample Completed Completed Completed Complete Complete Complete Complete Complete Complete Completed Completed Completed Completed. Completed Completed Calendar Year Operation Year Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Site Name Category Media Purpose Schedule Sample Locations Sampling Method 1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd E-80-3, E-82-1 MNA VOC Groundwater Sampling Groundwater Evaluate MNA for groundwater remedy across Area E Yr: 1-2 quarterly Yr 3-5: semi-annually Yr 6-duration annually E E E-12-H, E-12-L E-70-4, E-3WG-2 E-11WG-1, E-1 2 E-2, E-12-A 1 Passive Diffusion Bag 2013 Sixth Year of Operation Continued Seventh Year of Operation Eighth Year of Operation Ninth Year of Operation Tenth Year of Operation Completed Completed Completed Completed Completed Eleventh Year of Operation 77 Area E Biennial Groundwater Comprehensive, include these locations with MNA VOC Biennial E , E , E E-80-3, E-82-1, E-82-2 E , E-95-3, E-MW-11 E-12-D, E-12-H, E-MW-12K 3 E-12-L, E-70-2, E-70-3 E-70-4, E-3WG-1, E-3WG-2 E-3WG-3, E-11WG-1, E-11WG-1 E-11WG-2, E-11WG-3 3 Passive Diffusion Bag Completed Completed Completed Surface Water Sampling Surface Water SW sampling as Yr: 1-2 quarterly part of the Yr 3-5: semi-annually groundwater MNA Yr 6-duration annually remedy D-SW-5 E-38SW-1 E-38SW-4 Grab Sample Completed Completed Completed Completed Completed Calendar Year Operation Year Fourteenth Year of Twelfth Year of Operation Thirteenth Year of Operation Operation Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Site Name Category Media Purpose Schedule Sample Locations Sampling Method 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th E-80-3, E-82-1 MNA VOC Groundwater Sampling Groundwater Evaluate MNA for groundwater remedy across Area E Yr: 1-2 quarterly Yr 3-5: semi-annually Yr 6-duration annually E E E-12-H, E-12-L E-70-4, E-3WG-2 E-11WG-1, E-1 2 E-2, E-12-A 1 Passive Diffusion Bag Planned Planned Planned 77 Area E Biennial Groundwater Comprehensive, include these locations with MNA VOC Biennial E , E , E E-80-3, E-82-1, E-82-2 E , E-95-3, E-MW-11 E-12-D, E-12-H, E-MW-12K 3 E-12-L, E-70-2, E-70-3 E-70-4, E-3WG-1, E-3WG-2 E-3WG-3, E-11WG-1, E-11WG-1 E-11WG-2, E-11WG-3 3 Passive Diffusion Bag Planned Surface Water Sampling Surface Water SW sampling as Yr: 1-2 quarterly part of the Yr 3-5: semi-annually groundwater MNA Yr 6-duration annually remedy D-SW-5 E-38SW-1 E-38SW-4 Grab Sample Planned Planned Planned Notes: 1 Temporarily added to the long-term monitoring program; these samples will not be collected after the third quarter 2012 sampling event. 2 Monitoring well E-1 was not sampled during 2012 due to inaccessibility. 3 Cessation of sampling approved for the biennial wells in blue text prior to the September 2013 biennial sampling event. The Biennial comprehensive groundwater sampling includes sampling 24 wells (6 proposed for cessation of sampling) identified in the Record of Decision for VOCs via passive diffusion bags. GW = Groundwater MNA = Monitored Natural Attenuation SW = Surface Water VOC = Volatile Organic Compound

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13 EA Project No Page 5 EA Engineering, Science, and Technology, Inc., PBC December 2017 SAMPLING ACTIVITIES This section discusses the site activities conducted during the 2017 calendar year. 2.1 GROUNDWATER ELEVATION MEASUREMENTS Prior to groundwater sampling activities, water levels and well depths in the MNA network (18 wells) were gauged. The MNA network is depicted in Figure 2. In addition, monitoring wells were inspected to ensure continued performance. Appendix A includes all field forms for Well construction specifications and historical water level data for the approved monitoring well network are provided in Table COMPLIANCE MONITORING Groundwater and surface water monitoring activities were conducted in accordance with the Final Remedial Design for Area E and Site 22 (ARCADIS U.S., Inc. [ARCADIS] 2008), PICA Facility-Wide Health and Safety Plan (ARCADIS 2006a), PICA Facility-Wide Field Quality Assurance Project Plan (ARCADIS 2006b), and the PICA Facility-Wide Field Sampling Plan (ARCADIS 2007a). In addition to the documents listed above, groundwater and surface water monitoring was conducted and data were evaluated in accordance with the following NJDEP and USEPA guidance documents: Field Sampling Procedures Manual (NJDEP 2005), Guidance for Data Quality Assessment Practical Methods for Data Analysis (USEPA 2000), and Data Quality Assessment: Statistical Methods for Practitioners (USEPA 2006). An annual groundwater sampling event was completed in July 2017 in accordance with the Area E Final Remedial Design (ARCADIS 2008) and as amended by the Final 2012 Annual Monitoring Report (ARCADIS 2013). The annual event included sampling 18 groundwater monitoring wells and 3 surface water monitoring points. Groundwater samples were collected using passive diffusion bags (PDBs) and were analyzed for volatile organic compounds (VOCs) via USEPA Method 8260C. Field parameters, including ph, conductivity, temperature, dissolved oxygen (DO), turbidity, and oxidation-reduction potential (ORP), were collected via a down-well probe following retrieval of each PDB. Three surface water grab samples were collected, and field parameters were recorded. In addition to the sampling event a well assessment was completed and can be viewed in Appendix A. Monitoring well E-38MW-1 was unable to be located due to heavy brush. No field sampling audit was performed during the 2017 sampling event. 2.3 DATA VALIDATION AND USABILITY All data collected were third party validated in accordance with the USEPA National Functional Guidelines for Organic Data Review, dated August The validation criteria for long-term monitoring data include a review of the laboratory report narrative for noted deficiencies and the potential impact to data usability. Therefore, a review of chain-of-custodies, sample preservation, sample receipt logs, and a review of quality control parameters were performed for

14 EA Project No Page 6 EA Engineering, Science, and Technology, Inc., PBC December 2017 all data packages. No major deficiencies were identified during the data validation; therefore, no additional review was performed. A copy of the Data Validation Report is included with Appendix B.

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17 EA Engineering, Science, and Technology, Inc., PBC Table 2 Well Specification and Groundwater Elevation Summary Well Measuring Point Total Screen 7/31/2017 Well Diameter Elevation (msl) Depth Interval DTW WE Location Material (inches) (TOC) (ft bmp) (msl) (ft bmp) (msl) E-80-3 PVC E-82-1 PVC E-82-2 PVC E-95-3 PVC E-MW-11 PVC E-12-D PVC E-12-H PVC E-12-L PVC E-70-2 PVC 2 NA NA E-70-3 PVC E-70-4 PVC E-3WG-1 PVC E-3WG-2 PVC E-3WG-3 PVC E-11WG-1 PVC E-11WG-2 PVC E-1 PVC E-2 PVC EA Project No Page 9 December Monitoring Wells 95-5 and MW-12A were removed from the long-term monitoring regime in accordance with the approved 2012 Annual Monitoring Report. 2 Screen interval feet below top of casing. -- = Sample not collected msl = Mean sea level ft bmp = Feet below measuring point TOC = Top of casing DTW = Depth to water WE = Water elevation NA = Data not available

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19 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 11 December 2017 RESULTS This section presents the results of the sampling activities and evaluates the remedy performance. 3.1 GROUNDWATER ELEVATIONS Groundwater elevations ranged from a maximum of feet (ft) above mean sea level at E-95-3 to a minimum elevation ft above mean sea level at E-2 in July Historical groundwater elevation data indicate that groundwater flows generally toward the southeast under a horizontal hydraulic gradient of less than 0.01 feet per foot. A groundwater elevation contour map, based on the July 2017 gauging event, is presented in Figure 3. The flow direction indicated in the 2017 data is consistent with that previously observed at the Site. 3.2 ANALYTICAL RESULTS Groundwater samples were analyzed for VOCs. The five COCs for this Site are: PCE, TCE, cis- 1,2-DCE, 1,1-DCE, and VC. Table 3 presents the summary of all analyzed VOCs from the first quarter 2007 through the third quarter 2017 sampling events. Complete laboratory reports for the July 2017 groundwater sampling event is included in Appendix B. Field parameters for groundwater and surface water samples are available in Table 4. Based on a review of analytical data for groundwater samples collected during 2017, the following is a summary of the results for the COCs: Five wells (E-95-3, E-12-L, E-11WG-1, E-11WG-2, and E-3WG-2) had concentrations of PCE that exceeded the New Jersey Ground Water Quality Standard (NJGWQS) of 1 microgram per liter (μg/l) during the 2017 reporting period. Exceedances ranged from 2.7 μg/l at E-12-L to 15.2 μg/l at E-11WG-2. The concentration of PCE at E-95-3 saw a reduction to 10.2 μg/l from a concentration of 20.5 μg/l seen in Well E-95-3 typically has the highest concentrations of PCE; however, the highest concentration detected in July 2017 was at E-WG11-2 (15.2 μg/l). PCE was not detected in downgradient monitoring wells E-2 or E A PCE groundwater concentration map based on the 2017 groundwater sampling event is presented as Figure 4. Ten wells (E-82-1, E-1, E-MW-11, E-12-D, E-12-H, E-12-L, E-11WG-1, E-11WG-2, E-3WG-2, and E-3WG-3) had concentrations of TCE that exceeded the NJGWQS of 1 μg/l (detection limit of 0.35 μg/l) during the 2017 reporting period. The maximum reported concentration was 21.5 μg/l in monitoring well E-12-H. Monitoring wells downgradient of E-82-1 did not report results above the sample detection limit for TCE. A TCE groundwater concentration map based on the 2017 groundwater sampling event is presented as Figure 5. No wells had concentrations of cis-1,2-dce that exceeded the NJGWQS of 70 µg/l during 2017.

20 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 12 December 2017 Seven wells (E-70-4, E-82-1, E-82-2, E-80-3, E-11WG-1, E-3WG-2, and E-3WG-3) had concentrations of 1,1-DCE that exceeded the NJGWQS of 2 µg/l during the 2017 reporting period. The maximum concentration reported from wells within the plume center was 11.4 µg/l from E A 1,1-DCE groundwater concentration map based on the 2017 groundwater sampling event is presented as Figure 6. Three wells (E-70-3, E-70-4, and E-3WG-2) had concentrations of VC that exceeded the NJGWQS of 1 µg/l during the 2017 reporting period. The maximum concentration reported was 4.6 µg/l from E-3WG-2. A VC groundwater concentration map based on the 2017 groundwater sampling event is presented as Figure 7. Table 5 summarizes the 2017 surface water sampling results. As indicated in the table and included on Figures 4 and 5, concentrations of PCE and TCE were not detected at the three sampled locations (E-38SW-1, E-38SW-4, and D-SW-5) in July Additionally, there were no detections of cis-1,2-dce and 1,1-DCE. VC was detected above the surface water quality criteria (SWQC) of μg/l at all three surface water locations. Concentrations of VC ranged from 0.31 to 0.37 μg/l. Table 6 presents the surface water discharge data summary for Green Pond Brook in July 2017.

21 ³ *E < *E-MW *E < 690 ft AMSL E-3WG ft AMSL ro d n e re *E-3WG ft AMSL *E-11WG E-11WG n E-3WG < o < < P *E-12-L B E-12-D < G *E-12-H o k < < < *E E-70-2 NA < < E *E E < 688 ft AMSL < < 687 ft AMSL *E E ft AMSL 685 ft AMSL Area E < Groundwater Monitoring Well Interpolated Groundwater Elevation Contour NOTES: Inferred Groundwater Elevation Contour Approximate Groundwater Flow Direction 0 All elevations measured in feet above mean sea level *Indicates shallow well used as part of groundwater contouring NA = Elevation not available due to no surveyed elevation 2017 ANNUAL REPORT AREA E (PICA-077) PICATINNY ARSENAL 500 Feet Figure Groundwater Elevation Contour Map

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27 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 19 December 2017 Table 3 Historical Groundwater Sampling Results Location ID: Depth Interval: Sample Date: E-12-A E-12-A E-12-A E-12-D E-12-D E-12-D E-12-D E-12-D E-12-D E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H E-12-H /21/2011 3/20/2012 9/18/2012 9/13/2007 8/31/2009 8/26/2011 8/14/2013 9/8/2015 7/31/2017 9/12/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/24/2009 6/18/2009 8/31/2009 3/29/2010 9/8/2010 3/21/2011 8/26/2011 3/20/2012 9/18/2012 8/14/2013 CAS No Chemical Name Units NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l 1 < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 0.5 U cis-1,2-dichloroethene ug/l 70 < 1 U < 0.25 U < 0.25 U J J 0.69 J J < 0.5 U < 0.5 U J < 1 U < 1 U < 1 U < 1 U < 1 U 2.3 < 0.25 U < 0.25 U Tetrachloroethene ug/l J J J < 1 U < 0.5 U 0.29 J J J < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U Trichloroethene ug/l < 1 U 2.29 < 1 U 1.73 < 1 U J J Vinyl chloride ug/l 1 < 1 U < 0.25 U < 0.25 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U 0.31 J < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U J < 0.25 U < 0.25 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

28 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 20 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-MW-12H E-12-H E-MW-12H E-MW-12H E-12-K E-12-K E-12-K E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-12-L E-MW-12L E-12-L /9/2014 9/8/2015 7/11/2016 7/31/2017 9/13/2007 8/31/2009 8/26/2011 9/13/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/24/2009 6/18/2009 8/31/2009 3/29/2010 9/8/2010 8/26/2011 3/21/2011 3/20/2012 9/18/2012 8/14/2013 7/9/2014 9/8/2015 < 0.5 U < 0.5 U < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U J < 1 U < 1 U < 1 U J 0.82 J J J J J J J J J J J J 0.5 J 0.29 J J J < 0.5 U < 0.25 U < 0.5 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U J < 0.25 U J < 1 U < 1 U < 1 U < 0.25 U < 0.5 U < 1 UJ < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.25 U < 0.5 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

29 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 21 December 2017 Table 3 Historical Groundwater Sampling Results Location ID: Depth Interval: Sample Date: E-MW-12L E-MW-12L E-18-1 E-18-1 E-18-1 E-70-2 E-70-2 E-70-2 E-70-2 E-70-2 E-70-2 E-70-3 E-70-3 E-70-3 E-70-3 E-70-3 E-70-3 E-70-3 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E /11/2016 7/31/2017 9/11/2007 8/31/2009 8/26/2011 9/11/2007 8/31/2009 8/26/2011 8/14/2013 9/8/2015 7/31/2017 9/11/2007 8/31/2009 8/26/2011 9/18/2012 8/14/2013 9/8/2015 7/31/2017 9/11/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/24/2009 CAS No Chemical Name Units NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U 4.76 < 1 U < 0.5 U 0.39 J < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U J < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 UJ < 0.5 U < 1 U < 1 U < 1 U < 1 U 2.26 < 1 U < 1U < 0.5 U < 0.5 U J 2.91 < 0.25 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

30 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 22 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-70-4 E-80-1 E-80-1 E-80-1 E-80-2 E-80-2 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E /18/2009 8/31/2009 3/29/2010 9/8/2010 3/21/2011 8/26/2011 3/20/2012 9/18/2012 8/14/2013 7/9/2014 9/8/2015 7/11/2016 7/31/2017 9/12/2007 8/31/2009 8/26/2011 9/12/2007 8/31/2009 9/12/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/30/2009 < 1 U < 1 U 0.69 J < 1 U J < 1 U J 0.77 J J J < 1 U J < 1 U < 1 U < 1 U 0.29 J < 1 U 0.47 J J J J J J < 1 U J < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.25 U < 2.5 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.25 U < 2.5 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U J J J 2.7 J 2.2 < 1 U < 1 U J J < 1 U J < 1 U < 1 U J J J J Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

31 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 23 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-80-3 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E /18/2009 8/31/2009 3/30/2010 9/10/2010 3/21/2011 8/26/2011 3/20/2012 8/14/2013 7/9/2014 9/8/2015 7/11/2016 9/12/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/30/2009 6/18/2009 8/31/2009 3/30/2010 9/10/2010 3/21/2011 8/26/2011 3/20/ < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.5 U < 0.5 U J < 1 U J J J < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.5 U < 0.5 U J J J J J J 0.28 J < 1 U J J J < 0.5 U < 1 UJ < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

32 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 24 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-1 E-82-2 E-82-2 E-82-2 E-82-2 E-82-2 E-82-2 E-82-2 E-82-3 E-82-3 E-82-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E /18/2012 9/18/2012 8/14/2013 7/10/2014 9/8/2015 7/31/2017 9/12/2007 8/31/2009 8/26/2011 8/14/2013 9/8/2015 7/11/2016 7/31/2017 9/12/2007 8/31/2009 8/26/2011 9/12/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/24/2009 6/18/2009 8/31/2009 (2) < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U J < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U 7.13 < 0.5 U 27.3 < 0.5 U < 1 U < 1 U < 1 U J J J < 1 U J < 0.25 U < 0.25 U 1.79 < 0.5 U 0.61 J < 1 U < 1 U < 1 U < 1 U < 0.5 U 0.93 J < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U 1.1 < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.25 U < 0.5 U < 0.5 U J < 1 U < 1 U < 1 U < 0.5 U < 1 UJ < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

33 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 25 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 E-95-3 (FD) E-95-3 E-95-5 E-95-5 E-95-5 E-1 E-1 E-1 E-1 E-1 E-1 E-1 E-1 E-1 E /30/2010 9/8/2010 3/21/2011 8/26/2011 3/20/2012 9/18/2012 9/10/2013 7/9/2014 9/8/2015 7/11/2016 7/31/2017 7/31/2017 3/21/2011 3/20/2012 9/18/2012 9/20/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/24/2009 6/18/2009 8/31/2009 3/30/ J J J J < 0.5 U < 0.5 U < 0.5 U J < 0.5 U < 1 U < 0.5 U < 0.5 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 1 U < 0.25 U < 0.25 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U J 0.77 J J J < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 0.25 U < 0.25 U < 0.5 U < 1 UJ < 0.5 U < 0.5 U < 1 U < 0.25 U < 0.25 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

34 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 26 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-1 E-1 E-1 E-1 E-1 E-1 E-1 E-1 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E-2 E /8/2010 3/30/2011 8/26/2011 9/10/2013 7/9/2014 9/8/2015 7/11/2016 7/31/2017 9/20/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/30/2009 6/18/2009 8/31/2009 (2) 3/30/2010 9/10/2010 3/21/2011 8/26/2011 3/20/2012 9/18/2012 8/14/2013 7/9/2014 < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U 1.06 < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.5 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U 4.51 < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 1 U < 0.25 U < 1 U < 1 U < 1 U < 1 U J < 0.5 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U 57.1 < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 1 U < 0.25 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 UJ 3.61 < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.25 U < 1 U < 0.25 U < 1 U < 1 U < 1 U < 1 U < 0.25 U < 0.5 U < 1 UJ < 0.5 U J J J J J J J < 1 U < 1 U J < 1 U J J J < 1 U J Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

35 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 27 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-2 E-2 E-2 E-MW-11 E-MW-11 E-MW-11 E-MW-11 E-MW-11 E-MW-11 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG /8/2015 7/11/2016 7/31/2017 9/11/2007 8/31/2009 8/26/2011 8/14/2013 9/8/2015 7/31/2017 9/13/2007 9/13/ /27/2007 2/5/2008 5/20/2008 8/26/ /19/2008 3/30/2009 6/18/2009 8/31/2009 8/31/2009 3/30/2010 9/8/2010 3/21/2011 8/26/2011 3/20/2012 < 0.5 U < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U < 0.5 U < 1 UJ < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 1 U < 0.25 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

36 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 28 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-1 E-11WG-2 E-11WG-2 E-11WG-2 E-11WG-2 E-11WG-2 E-11WG-2 E-11WG-2 E-11WG-3 E-11WG-3 E-11WG-3 E-3WG-1 E-3WG-1 E-3WG-1 E-3WG-1 E-3WG-1 E-3WG-1 E-3WG-2 E-3WG-2 E-3WG /18/2012 8/14/2013 7/9/2014 9/8/2015 7/11/2016 7/31/2017 9/13/2007 8/31/2009 8/26/2011 8/14/2013 9/8/2015 9/13/2007 7/31/2017 8/31/2009 8/26/2011 9/8/2015 9/11/2007 8/31/2009 8/26/2011 9/10/2013 9/8/2015 7/31/2017 9/11/ /27/2007 2/5/ < 0.5 U < 1 U J < 1 U < 1 U < 1 U < 0.5 U 1.9 < 0.5 U < 1 U < 1 U 2.8 < 1 U 4.52 < 1 U 1.48 < 0.5 U < 0.5 U J J 2.4 < 1 U 1.6 < 1 U < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U J < 1 U < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U J 4.8 < 1 U < 1 U < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 0.25 U < 0.25 U J < 0.5 U < 1 UJ < 0.5 U < 1 U < 1 U < 1 U < 1 U < 0.5 U < 1 U < 0.5 U < 1 U < 1 U < 0.5 U J J < 1 U J < 0.5 U 0.92 J J J < 1 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

37 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 29 December 2017 Table 3 Historical Groundwater Sampling Results CAS No Chemical Name Units Location ID: Depth Interval: Sample Date: NJGWQS Comparison Criteria (1) ,1-Dichloroethene ug/l cis-1,2-dichloroethene ug/l Tetrachloroethene ug/l Trichloroethene ug/l Vinyl chloride ug/l 1 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-2 E-3WG-3 E-3WG-3 E-3WG-3 E-W63-3 E-W /20/2008 8/26/ /19/2008 3/24/2009 6/18/2009 8/31/2009 3/29/2010 9/8/2010 3/21/2011 8/26/2011 3/20/2012 9/18/2012 9/10/2013 7/9/2014 9/8/2015 7/11/2016 7/31/2017 8/31/2009 8/26/2011 9/10/2013 9/8/2015 7/31/ < 1 U 2.9 < 1 U < 1 U < 1 U < 0.5 U < 1 U < 1 U < 1 U 8.68 < 1 U J 5.49 < 0.25 U < 1 U < 1 U < 1 U < 0.5 U < 0.5 U < 1 U < 1 U < 1 U J < 0.5 U J J < 1 U J J < 1 U J J J J 4.6 < 1 U J < 1 U < 0.5 U < 0.5 U Notes: All detections are boldfaced Values exceeding the chemical-specific criteria are shaded gray. ug/l = micrograms per liter B = Analyte found in associated blank D = Compounds reported at a secondary dilution factor FD = Field duplicate J = Estimated concentration UJ = Estimated reporting limit R = Rejected < 1 U = Non-detect at the specified reporting limit (1) NJGWQS Comparison Criteria established as remedial goals for Area E in the Record of Decision (2008). (2) Based on sample times and results for samples E-MW-02 and E-95-3 collected on 8/31/2009, it is likely these were mislabeled, and results should be swapped.

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39 EA Engineering, Science, and Technology, Inc., PBC EA Project No Page 31 December 2017 Table 4 Groundwater and Surface Water Field Parameters Temperature Location Date ( C) ph (SU) ORP (mv) DO (mg/l) E /31/ E /31/ E /31/ E /31/ E-MW-11 7/31/ E-12-D 7/31/ E MW-12A E-12-H 7/31/ E-12-L 7/31/ E /31/ E /31/ E /31/ E-WG3-1 7/31/ E-3WG-2 7/31/ E-3WG-3 7/31/ E-11WG-1 7/31/ E-11WG-2 7/31/ E-1 7/31/ E-2 7/31/ E-38SW-1 7/31/ E-38SW-4 7/31/ D-SW-5 7/31/ Monitoring Wells 95-5 and MW-12A were removed from the long-term monitoring regime in accordance with the approved 2012 Annual Monitoring Report. -- = sample not collected C = degrees celsius ph (SU) = potential of hydrogen (standard units) ORP (mv) = oxidation reduction potential (millivolts) DO (mg/l) = dissolved oxygen (milligrams/liter) ms/cm = micro-siemens/centimeter NTU = nephelometric turbidity unit Conductivity (ms/cm) Turbidity (NTU)