Prepared for: Jersey City Redevelopment Agency 30 Montgomery Street Jersey City, NJ Prepared by:

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1 REMEDIAL INVESTIGATION REPORT/REMEDIAL ACTION WORKPLAN AMENDMENT BLOCK 60, LOTS 19R AND 19H, JERSEY CITY, HUDSON COUNTY, NEW JERSEY SRP PI# G and EPA ID#: SUB Prepared for: Jersey City Redevelopment Agency 30 Montgomery Street Jersey City, NJ Prepared by: 371 Warren Street, 3 rd Floor PO Box 38 Jersey City, New Jersey (201) November 2008

2 REMEDIAL INVESTIGATION REPORT/REMEDIAL ACTION WORKPLAN AMENDMENT BLOCK 60, LOTS 19R AND 19H, JERSEY CITY, HUDSON COUNTY, NEW JERSEY PROJECT NO. B TABLE OF CONTENTS SECTION PAGE NO. CERTIFICATION 1.0 INTRODUCTION USEPA 30-DAY NOTICE VAPOR INTRUSION PAH HOT SPOT PCB SOIL DELINEATION ADDITIONAL REMEDIAL INVESTIGATIONS Dioxin Sampling Results QUALITY ASSURANCE/QUALITY CONTROL (QA/QC) - DIOXIN Duplicate Samples Sampling Methods Sample Storage, Handling and Preservation Decontamination Procedures Sample Containers and Chain-of-Custody Procedures Laboratory Data Deliverable Format REMEDIAL ACTION WORKPLAN AMENDMENT Description of Additional Proposed Remedial Actions Re-evaluation of Vapor Intrusion Excavation and Offsite disposal of PAH hot spot Delineation of PCB Contamination to the NJDEP RDCSC Excavation and Offsite Disposal of Dioxin Impacted Soil Engineered Cap Deed Notice Statement of Completion of Remedial Action Requirements Required Permits Dust Control and Monitoring Health and Safety Plan Site Restoration Plan Remedial Action Cost Estimate Schedule... 9

3 REMEDIAL INVESTIGATION REPORT/REMEDIAL ACTION WORKPLAN AMENDMENT BLOCK 60, LOTS 19R AND 19H, JERSEY CITY, HUDSON COUNTY, NEW JERSEY PROJECT NO. B LIST OF TABLES TABLE OF CONTENTS (cont d) 1 Vapor Intrusion Screening Levels Comparison 2 Dioxin Soil Sample Summary 3 Dioxin Soil Sample Analytical Results LIST OF FIGURES 1 Proposed areas of onsite/offsite PCB delineation 2 Dioxin Sample Locations 3 Dioxin Sample Results 4 Proposed Dioxin Sample Locations 14A PAH hot spot in relation to the limits of the PCB soil excavation 18 Monitoring Well locations and Results LIST OF APPENDICES A B C Dresdner Robin November 11, 2008 Response Letter to USEPA Laboratory Data Packages (CD) Electronic Data Deliverables (EDD s)

4 1.0 INTRODUCTION On behalf of the Jersey City Redevelopment Agency (JCRA), Dresdner Robin has prepared this Remedial Investigation Report (RIR)/Remedial Action Workplan (RAW) Amendment for the property designated by the City of Jersey City Tax Assessor as Block 60, Lots 19R and 19H (portion), Jersey City, Hudson County, New Jersey (herein referred to as the Site ). The Site is currently subject to New Jersey Department of Environmental Protection (NJDEP) oversight pursuant to a Memorandum of Agreement (SRP PI# G and EPA ID#: SUB070001). The NJDEP Case Manager is Mr. Steve Kehayes. In accordance with discussions with NJDEP Case Manager on November 3, 2008, this RIR/RAW Amendment has been prepared to address the following items: USEPA 30-Day Notice approval, comparison of volatile organic compounds (VOCs) to the Vapor Intrusion screening criteria, Proposed remedial action for PAH soil hot spot at DR-120, PCB soil delineation to the NJDEP RDCSCC of.49 mg/kg, and Delineation of Dioxin to 1 ppb (TEQ) within Excavation number 11. Please refer to the June 2008 RIR/RAW for previous site remedial investigations, and remedial action workplan details. 2.0 USEPA 30-DAY NOTICE A 30-Day Notice for PCB remediation dated June 2008 was submitted to the USEPA for review by Dresdner Robin. The USEPA commented on the 30-Day Notice in a letter dated July 18, A response to the USEPA comments was submitted to the USEPA on November 12, 2008 and is attached as Appendix A. A copy of the USEPA approval letter will be forwarded upon receipt. 3.0 VAPOR INTRUSION Review of the March 31, April 1, 2008 sampling event revealed elevated concentrations of VOCs in two (2) of the seven (7) monitoring wells. Benzene was detected in MW-3 at 1.87 ug/l and in MW-6 at 7.23 ug/l, which exceeds the NJDEP GWQC of 1.0 ug/l. Chlorobenzene was detected in MW-6 at 306 ug/l which exceeds the NJDEP GWQC of 50 ug/l. Review of the April 24, 2008 sampling event revealed elevated concentrations of VOCs in two (2) of the six (6) monitoring wells. Benzene was detected in MW-3 at 3.0 ug/l and in MW-6 at 24.9 ug/l, which exceeds the NJDEP GWQC of 1.0 ug/l. Chlorobenzene was detected in MW-6 at 698 ug/l, which exceeds the NJDEP GWQC of 50 ug/l. 1,4-Dichlorobenzene was detected in MW-6 at 98.4 ug/l, which exceeds the NJDEP GWQC of 75 ug/l. Please note that MW-1 was vandalized and left in disrepair sometime after the initial groundwater sampling event and was therefore not sampled during the April 24 th, 2008 event. No volatile organic compounds were detected in this well during the initial sampling event 1

5 The groundwater volatile organic results were compared to the Generic Vapor Intrusion Screening Levels, Table 1 from the NJDEP Vapor Intrusion Guidance (October 2005). The comparison revealed that Benzene, Chlorobenzene, and 1,4-dichlorobenzene at MW-06 exceed groundwater screening levels. It should be noted that MW-06 is located within a proposed remedial excavation for PCB soil contamination. This monitoring well, MW-5 and MW-7 will be abandoned in accordance with N.J.A.C. 7:9D Well Construction and Maintenance; Sealing of Abandoned Wells. Upon completion of remedial activities it is proposed that the monitoring wells be re-installed and sampled to address vapor intrusion concerns. The locations of the monitoring wells and groundwater exceedances in relation to the limits of the PCB soil excavation are shown on Figure 18 of the June 2008 RIR/RAW Addendum. 4.0 PAH HOT SPOT Thirty-seven (37) borings and a total of thirty-seven (37) soil samples were collected and analyzed for PAHs during the investigation. Review of the results revealed the presence of PAHs as follows: eighteen (18) samples revealed concentrations of select PAHs in excess of the NJDEP s respective RDCSCC and Non-Residential Direct Contact Soil Cleanup Criteria (NRDCSCC) one (1) sample (DR-120) revealed concentrations of PAHs (benzo(b)fluoranthene and benzo(a)pyrene) in excess of the NJDEP s Impact to Groundwater Soil Cleanup Criteria (IGWSCC) PAHs at DR-120 also exceeded the maximum Historic Fill concentrations for benzo(a)anthracene and benzo(a)pyrene. Review of Groundwater analytical data for nearby MW-7 and other Site monitoring wells revealed that benzo(b)fluoranthene and benzo(a)pyrene were not present in groundwater. PAH hot spot DR-120, which is located within a proposed PCB excavation, and will be disposed of off-site at an appropriate disposal facility. Engineering controls will be implemented to address remaining contaminants through the construction of an engineered cap. As the proposed end-use for this portion of the Site is a parking garage, the final cap will incorporate building slabs, paved parking and street areas, concrete sidewalks and landscaped areas. PAH hot spot DR-120 in relation to the limits of the PCB soil excavations is shown on Figure 14A. 5.0 PCB SOIL DELINEATION Initially one hundred eighty-one (181) soil borings were sampled and analyzed for PCBs. An additional one hundred nineteen (119) borings were advanced for delineation. Including the work conducted by the EPA, a total of three hundred and fourteen (314) borings were advanced for PCB investigation. A total of fourteen hundred ninety-nine (1,499) soil samples were collected; nine hundred sixty-seven (967) of which were analyzed for PCBs. Review of the results revealed the presence of PCBs as follows: 2

6 Two hundred ninety-six (296) samples revealed concentrations of PCBs in excess of the NJDEP s Residential Direct Contact Soil Cleanup Criteria (RDCSCC) of 0.49 mg/kg but below the EPA High Occupancy Use Criteria of 10 mg/kg; One hundred eleven (111) samples revealed concentrations of PCBs in excess of the EPA High Occupancy Use Criteria of 10 mg/kg but below the TSCA threshold of 50 mg/kg; Seventy-seven (77) samples ranging from 50.0 mg/kg to 18,900 mg/kg exceeded the TSCA threshold of 50 mg/kg. Review of the remedial investigation findings indicate that PCB contamination has not been delineated to the NJDEP RDCSCC of 0.49 mg/kg along portions of the Sites perimeter. Additional sampling is therefore proposed to delineate PCBs to the NJDEP RDCSCC. Further delineation attempts within the property boundary will be performed before conducting offsite activities in an effort to limit offsite access issues. Samples will be collected at corresponding intervals to the exceedances of the NJDEP RDCSCC for PCBs. Delineation to the south along the Hudson-Bergen Light Rail (HBLR) will be addressed during the performance of remedial investigation of the property south of the HBLR. These investigations are scheduled for Access agreements with neighboring property owners will be obtained where necessary. Engineering controls will be implemented to address remaining PCBs less than 10 mg/kg through the construction of an engineered cap. As the proposed end-use for the Site is commercial/residential, the final cap will incorporate building slabs, paved parking and street areas, concrete sidewalks and landscaped areas. Areas in need of further PCB delineation are presented on Figure ADDITIONAL REMEDIAL INVESTIGATIONS 6.1 Dioxin Sampling On July 15 th thru 18 th, 2008, Dresdner Robin collected one hundred and thirteen (113) soil samples and an additional six (6) QA/QC samples from forty-five (45) locations. Thirty-three (33) samples were collected from the proposed Excavations, biased towards the highest PCB concentrations. Since Excavations 1 thru 6 had been excavated as part of remediation and postexcavation sampled for PCBs prior to the Dioxin sampling event, samples from were collected at the excavation bottom and at two (2) additional intervals below. Dioxin samples were collected as follows: Excavation 1 had six (6) samples collected from two (2) sample locations, DX 29 and DX 30. Excavation 2 had three (3) samples collected from one (1) sample location, DX 26. Excavation 3 had three (3) samples collected from one (1) sample location, DX 1. Excavation 4 had three (3) samples collected from one (1) sample location, DX 2. Excavation 5 had three (3) samples collected from one (1) sample location, DX 11. Excavation 6 had three (3) samples collected from one (1) sample location, DX 28. Excavation 11 had twenty-three (23) samples collected from fifteen (15) locations within the excavation boundaries. 3

7 An additional fifty-seven (57) samples (DX 3 thru DX 21) were collected from nineteen (19) locations inside and along the sidewalls of Excavation 11 and placed on hold. Twelve (12) samples (DX 22 thru DX 25) from Excavations 7 thru 10 were placed on hold. A summary of the Dioxin soil sampling is presented on Table 2. Dioxin sample locations are presented on Figure Results Review of the laboratory analytical results for Dioxin revealed the following: Samples collected from Excavations 1 thru 6 revealed that dioxin concentrations were below 1 ppb (TEQ). Five (5) samples (DR-76W1A, DR-77A, DR-165A, NJTP5 C-12, and NJTP5 D-11) from Excavation 11 detected concentrations of Dioxin that exceed the 1 ppb (TEQ). The remaining samples were below 1 ppb (TEQ). It should be noted that all the elevated concentrations of Dioxin where detected in Excavation 11 at intervals of and ft bgs. Deeper samples collected reveal no Dioxin above the 1 ppb (TEQ). The presence of the Dioxin can likely be attributed to the historic fire that took place at the Site. Dioxin soil sample analytical results are presented on Table 3. Dioxin sample locations and results are presented on Figure 3. Laboratory Analytical Data Packages are included as Appendix B. Collection and analysis of additional samples is proposed to delineate the extent of Dioxin greater than the 1 ppb (TEQ) within Excavation 11. Samples will be collected from within the inside edge of the Excavation 11 sidewalls at depths consistent with previously collected samples. The objective is to confirm that Dioxin is limited to the PCB excavation area and any concentrations above 1 ppb (TEQ) will be removed via the predetermined PCB excavation. In addition, samples collected from the proposed Excavations 7 thru 10 (which were not originally analyzed), will also be analyzed. Engineering controls will be implemented to address remaining contaminants through the construction of an engineered cap. Proposed Dioxin sample locations are presented on Figure QUALITY ASSURANCE/QUALITY CONTROL (QA/QC) - DIOXIN Quality Control sampling was performed to provide control over the collection of samples and the validity of analytical data. The sample analyses were performed in accordance with the reduced laboratory data deliverables. Analytical methods and quality assurance did conform to the NJDEP s Field Sampling Procedures Manual in effect as of the date of the sampling. 7.1 Duplicate Samples Duplicate samples were collected to evaluate the laboratory s performance by comparing analytical results of two (2) samples from the same location. The duplicate samples were analyzed for the same parameters as the samples analyzed that day. 4

8 7.2 Sampling Methods Soil samples were collected utilizing encore samplers and disposable plastic trowels. 7.3 Sample Storage, Handling and Preservation The sample containers were labeled with sample number, date, time of collection, analytical parameters, preservatives, site name and person or persons performing the sampling. The laboratory performing the analysis was responsible for preserving the sampling bottles prior to shipment into the field. Samples were kept cool at 4 o C and transported in coolers to the laboratory. Proper chain-of-custody documentation was maintained, beginning with the laboratory s release of the bottles. A detailed soil sampling log was prepared for each sampling location. The sample holding time began at the time of collection. Blanks and samples were not held on-site for longer than two (2) calendar days and arrived back in the lab within one (1) day of shipment from the field, constituting a four (4) day handling time. 7.4 Decontamination Procedures Since each soil and ground water sample was collected utilizing a disposable sampling device (i.e., encore sampler, plastic trowel/scoop, Teflon bailer), no decontamination procedures were conducted. 7.5 Sample Containers and Chain-of-Custody Procedures Clean sample containers were supplied by the laboratory for both the soil and ground water sampling events. The appropriate preservatives were added to the sample bottles by the laboratory prior to shipment. The chain-of-custody accompanied the bottles during transportation from the laboratory to the field, sample collection, transportation back to the laboratory, analysis and final disposal of the sample. The chain-of-custody listed each of the individual sample containers and was signed by the sampling team members. Samples were stored on ice at 4 o C in a secure area until they were relinquished to a courier for delivery to the laboratory. 7.6 Laboratory Data Deliverable Format Laboratory analyses of the soil samples were performed in accordance with the reduced laboratory data deliverables. Electronic Data Deliverables (EDD s) are included as Appendix C. 8.0 REMEDIAL ACTION WORKPLAN AMENDMENT 8.1 Description of Additional Proposed Remedial Actions In accordance with N.J.A.C. 7:26E-6, a Remedial Action Selection Report has been prepared and is provided in Appendix F of the June 2008 RIR/RAW. The additional proposed remedial actions for the Site comprise four (4) main components as follows: 5

9 re-evaluation of Vapor Intrusion following completion of soil remediation actions, excavation and off-site disposal of PAH hot spot DR-120, onsite/offsite delineation of PCB contamination to the NJDEP RDCSC of.49 mg/kg where applicable, and excavation and off-site disposal of Dioxin impacted soil above 1 ppb (TEQ) in Excavation 11. A detailed description of each component of the remedial action is provided below Re-evaluation of Vapor Intrusion MW-06 is located within the proposed remedial excavation for PCBs and will be abandoned. Upon completion of remedial activities for PCBs, monitoring well MW-06 will be re-installed and sampled. Vapor Intrusion will be re-evaluated after the re-installation and collection of groundwater samples. Installation of additional monitoring wells may be required at the discretion of the NJDEP Excavation and Offsite disposal of PAH hot spot It is proposed that the PAH hot spot DR-120 will be excavated and disposed of off-site at an appropriate disposal facility during the remediation activities for PCBs Delineation of PCB Contamination to the NJDEP RDCSC Additional sampling is proposed to delineate PCBs to the 0.49 mg/kg NJDEP RDCSCC. Further delineation attempts within the property boundary will be performed before conducting offsite activities in an effort to limit offsite access issues. Samples will be collected at corresponding intervals to the previous exceedances. Delineation to the south along the Hudson- HBLR will be addressed during the performance of remedial investigation of the property scheduled for Access agreements with neighboring property owners will be obtained where necessary. Engineering controls will be implemented to address remaining PCBs less than 10 mg/kg through the construction of an engineered cap. As the proposed end-use for the Site is commercial/residential, the final cap will incorporate building slabs, paved parking and street areas, concrete sidewalks and landscaped areas Excavation and Offsite Disposal of Dioxin Impacted Soil The collection and analysis of additional samples is proposed to delineate the extent of Dioxin greater than the 1 ppb (TEQ) within Excavation 11. Samples will be collected from within the inside edges of Excavation 11 sidewalls at depths consistent with previously collected samples. The objective is to confirm that Dioxin is limited to the PCB excavation area and that any concentrations above 1 ppb (TEQ) will be removed via the predetermined PCB excavation. Engineering controls will be implemented to address remaining contaminants through the construction of an engineered cap. 6

10 8.1.5 Engineered Cap As proposed in the June 2008 RIR/RAW, engineering controls will be implemented at Block 60, Lots 19R and 19H to address remaining contaminants through the construction of an engineered cap. As the proposed end-use for the Site is commercial/residential, the final cap will incorporate building slabs, paved parking and street areas, concrete sidewalks and landscaped areas. A minimum of two (2) feet of clean fill will be placed in any landscaped areas. All asphalt and concrete areas associated with the end-use of the Site will have a minimum thickness of 4-8 inches in accordance with the NJDEP Guidance Document for the Remediation of Contaminated Soils. The cross section details for the proposed cap will be provided once the design of the building is completed Deed Notice As contaminants will remain which have concentrations above the RDCSCC and NRDCSCC, a Deed Notice is required to document the extent of contamination and the engineering controls. A draft Deed Notice is provided in Appendix G of the June 2008 RIR/RAW. It sets forth a schedule for the maintenance and evaluation of the institutional and engineering controls pursuant to N.J.A.C 7:26E-6.1(B). The inspection and maintenance of the cap will be the responsibility of the owner. 8.2 Statement of Completion of Remedial Action Requirements All applicable requirements of N.J.A.C. 7:26E-6 (Remedial Action) will be completed. The NJDEP and local governing body (City of Jersey City) will be notified of the intended remedial action. The remedial action will also meet the following criteria: approval by the NJDEP prior to implementation, compliance with all applicable remediation standards in effect at the time of RAW approval, compliance with all applicable Federal, State, and local laws, not in itself cause an uncontrolled or un-permitted discharge or transfer of contaminants from one media to another, be re-evaluated every five years, and institutional and engineering controls will be utilized Following completion of activities described in the RAW, a Remedial Action Report will be prepared and submitted to the NJDEP. 8.3 Required Permits A soil erosion and sediment control plan will be prepared and submitted to the Hudson-Essex- Passaic Soil Conservation Service for approval. A permit for dewatering activities may be required. 7

11 8.4 Dust Control and Monitoring All soil disturbance/excavation remediation activities will be monitored for nuisance dust. Dust control measures shall be implemented by the remediation contractor in order to limit the generation of airborne particulates during site development activities. If the respirable dust levels exceed the air standards identified in the Health and Safety Plan at any time during site redevelopment activities, dust control measures will be implemented as necessary and as required by the Site Health and Safety Supervisor (SHASS). Detailed procedures for minimizing worker and public exposure to respirable particles will be conducted, including use of equipment for spraying soils with water to control dust or other appropriate effective procedures whenever they are requested by the SHASS including portable wind fences to be placed at the discretion of the SHASS. All soil stockpiles will be placed on and covered with plastic daily. The contractor may be restricted from operating in very high winds at the discretion of the SHASS. 8.5 Health and Safety Plan A Health and Safety Plan (HASP) is necessary to define the health and safety requirements necessary to protect nearby residents and workers involved in the remedial activities to be conducted at the Site. The Contractors undertaking the remedial actions and building activities for this project will be required to prepare a site-specific HASP for review and approval prior to the commencement of any site work. A Health and Safety Plan setting forth minimum standards has been prepared in accordance with the requirements of 7:26E-1.9 and is attached as Appendix H of the June 2008 RIR/RAW. 8.6 Site Restoration Plan The Site will be capped with the proposed building structures, concrete walkways, paved (asphalt) parking areas and, landscaped areas. 8.7 Remedial Action Cost Estimate The cost of the proposed remedial action as outlined in the June 2008 RIR/RAW is estimated to be $6,000, $9,000, and includes the following: 1. Groundwater Investigation 2. PCB Remediation of Soil Contamination above 10 mg/kg 3. Reporting 4. Project Management and Coordination/Meetings Note: The building slab and pavement areas that will function as an engineering control are considered to be site improvements and have not been included in the remedial action cost estimate. 8

12 8.8 Schedule A schedule for the proposed remedial actions is attached as Figure 21 of the June 2008 RIR/RAW. 9