92-25 Exhibit A.pdf

Matrix New World Engineering, Land Surveying and Landscape Architecture, P.C. 26 Columbia Turnpike Florham Park, NJ 07932 973.240.1800 Fax 973.240.1818 www.mnwe.com Via Email 92-25 August 7, 2024 Ms. Zayibeth Carballo Township of West Orange 66 Main Street West Orange, NJ 07052 Re: PROPOSAL FOR ENVIRONMENTAL SERVICES – OFF-SITE VAPOR INTRUSION INVESTIGATIONS AND CEA CORRESPONDENCE 4-10 CENTRAL AVENUE BLOCK 9, LOT 32 WEST ORANGE, NEW JERSEY MATRIX NO. 18-286-01 Dear Ms. Carballo: As requested, Matrix New World Engineering, Land Surveying, and Landscape Architecture, P.C. (Matrix) is pleased to provide this proposal to reflect cost incurred by Matrix for the Biddelman property. Biddelman This proposal also reflects the additional cost incurred by Matrix for sampling activities previously completed which were associated with the off-site vapor intrusion investigation activities and preparation of the supplemental Remedial Investigation Report (RIR) for the Former Biddelman, Inc (Biddelman) property, located at 4-10 Central Avenue (Block 9, Lot 32) in the Township, New Jersey. These costs were in addition to Purchase Order 174952 (for $62,900). The activities summarized below were time sensitive and required to meet the NJDEP’s mandatory timeframe of December 5, 2022 (previously extended by the NJDEP from August 5, 2022). The original RIR/RAW was submitted to the NJDEP in September 2021. In May 2022, the NJDEP responded, indicating a requirement to complete additional off-site vapor intrusion (VI) investigations to address potential VI exposure for occupants in buildings within 100 feet of the boundaries of the classification exception area (CEA) associated with the PCE/TCE plume. In an attempt to off-set costs to the Township, Matrix prepared an Application for a Hazardous Discharge Site Remediation Fund (HDSRF) Grant to complete the off-site VI investigation and submitted the application to the New Jersey Economic Development Authority (NJEDA) and the New Jersey Department of Environmental Protection (NJDEP) on October 21, 2021. However, due to the concerns with the potential exposure to vapors associated with the existing PCE/TCE plume, the NJDEP required the completion of the off-site VI investigation prior to approval and release of the funds requested by the Township in the HDSRF application. In addition, the NJDEP considered the RIR to be incomplete

he completion of the off-site VI investigation prior to approval and release of the funds requested by the Township in the HDSRF application. In addition, the NJDEP considered the RIR to be incomplete until the additional VI sampling was completed. In addition, Matrix received an email from the NJDEP on August 6, 2024 with regards to the submission of the CEA Fact Sheet Form submitted for the Biddelman Site. The NJDEP have several questions with regards to the November 29, 2022 CEA submission. Matrix will prepare and submit a response to the NJDEP within 60-days (Due on October 6, 2024). F:\2018\18-286 Biddleman - 8-10 Central Avenue\Proposal\Vapor Intrusion Proposal_Off-site - June 2022\Feb 2025\Supplement RIR_10 Central Avenue_REV.docx 1