DEPARTMENT OF THE ARMY INSTALLATION MANAGEMENT COMMAND HEADQUARTERS, UNITED STATES ARMY GARRISON, PICATINNY PICATINNY ARSENAL, NEW JERSEY

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1 DEPARTMENT OF THE ARMY INSTALLATION MANAGEMENT COMMAND HEADQUARTERS, UNITED STATES ARMY GARRISON, PICATINNY PICATINNY ARSENAL, NEW JERSEY March 9, 017 SUBJECT: Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)/Interagency Agreement Administrative Docket No. II-CERCLA-FFA : Final PICA-07(Site 173) Soil Sampling Work Plan Addendum: Review is ER,A-eligible Ms. Sharon Hartzell U.S. Environmental Protection Agency 90 Broadway, 18th Floor New York, NY Ms. Anne Pavelka, Case Manager New Jersey Department of Environmental Protection Division of Responsible Party Site Remediation 401 East State Street, Floor 5 Trenton, New Jersey Ms. Hartzell and Ms. Pavelka: Enclosed for your records are copies of the PICA-07 (Site 173) Soil Sampling Work Plan Addendum (the WP). The NJDEP provided concurrence of the responses to the NJDEP comments to draft WP in an dated March 1 st : EPA provided approval of the WP with a March 4 th . The sampling is scheduled for the middle of next week after the sampling of the Off-Range Sites. Sincerely, Enclosure Ted Gabel, Project Manager for Environmental Restoration 1

2 FINAL PICA-07 (Site 173) SOIL SAMPLING WORK PLAN ADDENDUM PICATINNY ARSENAL CLEANUP CONTRACT PICATINNY ARSENAL, NEW JERSEY March 017 Prepared for: Contract No.: W91ZLK-13-D-0014, Delivery Order 0007

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4 FINAL PICA-07 (Site 173) SOIL SAMPLING WORK PLAN ADDENDUM PICATINNY ARSENAL CLEANUP CONTRACT PICATINNY ARSENAL, NEW JERSEY March 017 Prepared for: Prepared by: ECC 43 Broad St, Suite A301 Hudson, MA Contract No.: W91ZLK-13-D-0014, Delivery Order 0007

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6 PICA-07(Site 173) Soil Sampling Work Plan Addendum Version: Final Picatinny Arsenal Cleanup Contract, Picatinny Arsenal, New Jersey March 017 CONTRACT NO. W91ZLK-13-D-0014 Page 1 This Work Plan Addendum (Addendum) will be used in conjunction with the Final PICA-07 (PICA-07 and Site 173) Soil Sampling Work Plan (Work Plan [ECC, May 016]), and all applicable references contained therein. This Addendum was prepared to further define the horizontal and vertical extent of contaminants of concern (COCs) in subsurface soil at PICA-07 Site 173. The rationale for the additional soil sampling and proposed locations are described below. QAPP Worksheet #17 Addendum Sampling Design and Rationale On 31 March 016, ECC field personnel mobilized to Site 173 to conduct surface and subsurface soil sampling. A total of four surface and nine subsurface soil samples were collected from six locations (173-SS-04, -05, -06, -07, -09, and -10 [Figure 10-7]) and submitted to an off-site laboratory for analysis for polycyclic aromatic hydrocarbons (PAHs). Samples were collected using Direct Push Technology (DPT) drilling methods with Unexploded Ordnance (UXO) avoidance support. Per the Final Work Plan, samples were planned to be collected from 0 to 10 ft below ground surface (bgs). Due to UXO anomaly avoidance or drilling refusal, samples could only be collected to a depth of ft bgs at locations 173-SS-04, -06, -and -09, and to 4 ft bgs at locations 173-SS-05, -07, and -10. Analytical results from these samples reported PAHs in exceedance of Project Action Limits (PALs [Figure 10-7]). In addition, a layer of black paper/cardboard-like material was observed from 1 to ft bgs at all locations with the exception of 173-SS-06 and -07. This material was reported to have a naphthalene-like odor. Photoionization detector (PID) field screening results were within the 0 to 55 parts per million (ppm) range where this material was observed. Based on the results of these samples, the horizontal and vertical extent of PAH contamination at Site 173 has not been fully defined. To address these data gaps, ECC will mobilize to Site 173 and collect additional surface and subsurface soil samples. Six initial locations (173-SS-11, -1, -13, -14, -15, and -16) are shown on Figure These proposed locations are approximately 30 ft away from the 31 March sample locations. Soil borings will be advanced using DPT drilling methods with UXO avoidance support. The borings will be advanced to final depth if no refusal or anomalies are encountered. If refusal or anomalies are encountered, the boring will be abandoned, the drill rig moved approximately 5 ft outward, and another boring will be attempted. Surface soil samples will be collected from the 0-1 ft depth interval from the DPT core at each sample location. For subsurface samples, each DPT soil core will be visually inspected for signs of any potential impact (e.g., soil staining). If signs of impact are observed (visual/olfactory), a subsurface soil sample will be collected from that portion of the core. If no sign of impact is observed, then subsurface soil samples will be obtained from the following depth intervals: 1- ft bgs, -4 ft bgs (depth at which most elevated detections of PAHs were observed during previous investigations), and 9-10 ft bgs (or from just above the water table if encountered before the 9-10 ft interval). If signs of impact are observed, ECC will then attempt to advance a another boring approximately 15 feet further out from the first location. This method will be repeated until there is no observable evidence of contamination.

7 PICA-07(Site 173) Soil Sampling Work Plan Addendum Version: Final Picatinny Arsenal Cleanup Contract, Picatinny Arsenal, New Jersey March 017 CONTRACT NO. W91ZLK-13-D-0014 Page If no physical evidence of contamination is observed at the initial sample location, the drill rig will be moved approximately 15 ft closer (inward) toward the 31 March sample locations and another boring will be advanced and sampling will be conducted as described above. This method will be repeated until contamination is encountered and a sample from the impacted interval will be collected for PAH analysis. In addition, one boring (173-SS-15) will be advanced in the approximate center of the area of contamination. This boring will be advanced to 10 ft bgs or top of groundwater. Samples will be collected from 0-1 ft bgs (surface soil), 1- ft bgs, -4 ft bgs, and 9-10 ft bgs (or top of groundwater), as well as any interval that appears to have been impacted based on visual/olfactory observations. A summary of the proposed sample identifications, locations, and associated coordinates are listed in Table 17-. Table 17- Proposed Soil Samples and Associated Coordinates PICA-07(Site 173) Soil Sampling Work Plan Addendum, PICA New Jersey Proposed Sampling Location Site ID Identification Number 1 X-Coordinate Y-Coordinate Site SS Site SS Site SS Site SS Site SS Site SS NOTES: 1 A unique sampling location identification number is designated for each sampled location (i.e., set of coordinates) that consists of Site Number, media, and location number. The sample collection depth and date will be appended to the sampling location identification number. Coordinate System: NAD83 New Jersey State Plane U.S.-Foot

8 PICA-07(Site 173) Soil Sampling Work Plan Addendum Version: Final Picatinny Arsenal Cleanup Contract, Picatinny Arsenal, New Jersey March 017 CONTRACT NO. W91ZLK-13-D-0014 Page 3 1 QAPP Worksheet #0 Addendum Field QC Summary The anticipated number of QC samples is determined based on the number of samples collected and analyzed. In accordance with Worksheet 0 of the Site-Wide UFP-QAPP, one field duplicate will be collected for every 0 normal samples and one equipment blank will be collected at a minimum of one per sampling mobilization for non-dedicated equipment (only one mobilization expected for this sampling event). Site specific matrix spike and matrix spike duplicates (MS/MSDs) will be collected at a frequency of one per 0 samples and will be run/reported with laboratory batch samples. Table 0- Field QC Summary PICA-07 (Site 173) Soil Sampling Work Plan Addendum, PICA New Jersey Matrix Analyte Method Number of Samples 1 Field Duplicates Equip. Blanks Total General Samples PAHs and Aqueous 870D LL-P Carbazole Site Locations PAHs and Soil 870D LL-P Carbazole 1 This is the planned number of samples to be collected. Additional samples may be collected if evidence of contamination is observed as discussed in Worksheet 17 Addendum. Equipment blanks will be collected at a minimum of one per sampling mobilization for non-dedicated equipment; only one mobilization is anticipated for completion of this sampling event. LL-P = Low level PAH

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10 Figures

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12 173-SS-07 PAL PAL NJDEP Analyte (0- ft) (-4 ft) NRSRS Benzo(a)anthracene.9 Benzo(a)pyrene Benzo(b)fluoranthene.9 Benzo(k)fluoranthene 9 3 Chrysene Dibenz(a,h)anthracene Indeno(1,,3-c,d)pyrene.9 Naphthalene SS-10 PAL NJDEP Depth (ft) Analyte (mg/kg) (-4 ft) NRSRS -4 Benzo(a)anthracene J Benzo(a)pyrene J Benzo(b)fluoranthene J Benzo(k)fluoranthene J Dibenz(a,h)anthracene J Indeno(1,,3-c,d)pyrene J Depth (ft) J Legend Proposed Additional Soil Sample No Sample Collected Due to Refusal Soil Sample with PAL Exceedance Culvert Sewer Sanitary Line Steam Distribution Line Water Distribution Line 173-SS-09 PAL NJDEP Depth (ft) Analyte (mg/kg) (0- ft) NRSRS 1- Benzo(a)anthracene SS-11 Benzo(a)pyrene Benzo(b)fluoranthene 0.57 Benzo(k)fluoranthene 3 59 Chrysene Indeno(1,,3-c,d)pyrene Naphthalene SS SS SS MW- 173-SS SS SS-3A/B ECC GIS Server F:\Projects\Picatinny\MapDocuments\WP\PICA-07\07_SupWP_Fig10-7_Site173_AddPropLocs.mxd Depth (ft) SS SS SS-3C 173-SS SS SS SS-06 PAL NJDEP Analyte (mg/kg) (0- ft) NRSRS Benzo(a)anthracene Benzo(a)pyrene 0. Benzo(b)fluoranthene Benzo(k)fluoranthene 3 Chrysene 30 Dibenz(a,h)anthracene 0. Indeno(1,,3-c,d)pyrene Naphthalene SS SS-04 PAL NJDEP Depth (ft) Analyte (mg/kg) (0- ft) NRSRS Benzo(a)anthracene ,350 Benzo(a)pyrene ,500 Benzo(b)fluoranthene.17 5,970 Benzo(k)fluoranthene ,070 Carbazole ,090 Chrysene ,080 Dibenz(a,h)anthracene Indeno(1,,3-c,d)pyrene 1.1 3,440 Naphthalene , SS SS-05 PAL PAL NJDEP Analyte (mg/kg) (0- ft) (-4 ft) NRSRS Benzo(a)anthracene.9 Benzo(a)pyrene Benzo(b)fluoranthene.9 Benzo(k)fluoranthene 9 3 Carbazole Chrysene Dibenz(a,h)anthracene Indeno(1,,3-c,d)pyrene.9 Naphthalene Depth (ft) 1-1-(DUP) 13. J J J J.71 J 1.31 J J 11.8 J 7.79 J 1.84 J J J 0.39 J -4,610,310 3, ,140, ,730,160 Approximate Location of Historical Railroad Tracks Historical Subsurface Soil Sample Location Historical Surface Soil Sample Location Site 173 Site Boundary NOTES & SOURCES: 1. Map Coordinates: NAD83 State Plane New Jersey, US feet. Exceedances of surface soil (0- ft) Project Action Limits (PAL) (United States Ecological Soil Screening Level, November 010), as per Table 15-1 of the Final PICA 07 (PICA-07 and Site 173) Soil Sampling Work Plan (May 016), are highlighted in blue/gray. 3. Exceedances of subsurface soil (> ft) PALs (United States Environmental Protection Agency Industrial Regional Screening Level for Soil, November 015), as per Table 15-1 of the Final PICA 07 (PICA-07 and Site 173) Soil Sampling Work Plan (May 016), are highlighted in gray. 4. Exceedances of New Jersey Department of Environmental Protection Non-Residential Direct Contact Soil Remediation Standards (NJDEP NRSRS) (May 01) are in red text. 5. Since there are no USEPA values available for carbazole, for this one compound, the New Jersey Department of Environmental Protection Residential Direct Contact Soil Cleanup Criteria (May 01) will be used as the PAL. 6. A sample was collected at location 173-SS-10 due to refusal, and no sample collection, at location 173-SS All samples were collected on 31 March All criteria and sample results are in milligram per kilogram (mg/kg). 9. DUP = duplicate 10. ft = feet 11. J = estimated 1. PICA = Picatinny Arsenal Feet Figure 10-7 Site 173 Polycyclic Aromatic Hydrocarbon Exceedances and Proposed Additional Sampling Locations Picatinny Arsenal Morris County, New Jersey

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