100-25 Exhibit A-RES 350-23 RI.pdf

ASSOCIATES Mr. John Gross April 14, 2023 Township Business Administrator/CFO Page 2 of & Re: Department of Public Works at 25 Lakeside Avenue — Remedial Investigation Investigation of the identified areas of concern (AQCs) in the Preliminary Assessment conducted by Matrix. Matrix conducted a Preliminary Assessment (PA) at the Site and complete: it in August 2022. Based on a review of the PA, several AOCs are identified, inside and around the DPW garage. that could be the source of the discharge at MW-9 and other potential discharges. Additional Site and Remedial investigation activities should be completed to investigate these new AOCs and the extent of impacted soil and groundwater related to any potential discharges. CME conducted a Site Investigation ($1) in accordance with NJDEP requirements and guidance documents. As part of the investigation, soil samples were collected at the identified AOCs and groundwater samples were obtained from temporary well points installed at locations proximate to the AOCs. Based on the findings of the investigation, it appears that few discharges occurred at the Site which has impacted soil and groundwater at the Site. CME recommended further investigation be conducted in accordance with the Technical Requirements for Site Remediation (TRSR) (NJAC. 7:26E) and NJDEP guidance documents to evaluate the extent of soil and groundwater impacts and determine the flow of groundwater beneath the Site. Based on the results of the Site Investigation sampling, a Remedial Investigation of the impacted AOCs and delineation of impacted soil and groundwater at the Site is required. This proposal was requested to conduct the required Remedial Investigation of the AOCs and complete the delineation of impacted soi! and groundwater at the Site. The following scope of work is required to comply with the NJDEP Technical Requirements for Site Remediation at the Site and necessary to continue to advance the project towards a closure with Site-wide RAO. The scope of work included in this proposal is based on the recommendations for investigation at AOCs identified in the PA and Site Investigation Report. The proposed scope of work is prepared to establish a Remedial Investigation of impacted AOQCs to satisfy the New Jersey Department of Environmental Protection (NJDEP) requirements. Note that based on the findings of the Remedial

prepared to establish a Remedial Investigation of impacted AOQCs to satisfy the New Jersey Department of Environmental Protection (NJDEP) requirements. Note that based on the findings of the Remedial Investigation included in this proposal, further investigation and/or remediation may be warranted. This proposal does not include costs associated with additional investigation and remediation services beyond the scope of services presented herein.