Township Council Meeting — Packet

A Preliminary Assessment was conducted as part of due diligence by Matrix in 2021 which identified additional areas of concern (AOCs) at the Site including the need for additional vapor intrusion evaluation in accordance with the May 2021 Vapor Intrusion Technical Guidance. Therefore, during the heating season in 2023, Consulting & Municipal Engineers Associates (CME), completed an additional vapor intrusion investigation at the Site. The vapor intrusion investigation was performed to evaluate the potential impacts to indoor air quality due to groundwater impacts identified in monitoring well MW-10 at concentrations exceeding the NJDEP Vapor Intrusion Groundwater Screening Levels (VIGSL) and the presence of LNAPL in monitoring well, MW-9. During this sampling event, three IA samples, six SSSG samples, and one AA sample were collected from the Site. Based on the analytical results, benzene and ethylbenzene were identified in the IA samples above the indoor air remediation standards but below the rapid action levels and Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (PEL), the National Institute of Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL) and the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV). The benzene and ethylbenzene impacts identified in the IA samples were most likely associated with Site operations as these compounds were not identified in the SSSG samples. However, TCE was identified in the SSSG samples above the soil gas screening levels and the Residential Indoor Air Remediation Standards (RIARS) but below the Non-Residential Indoor Air Remediation Standards (NRIARS) and the OSHA and NIOSH standards identified above. Based on results of previous investigations and as per the NJDEP Vapor Intrusion Technical guidance long-term monitoring for vapor intrusion is recommended. Matrix will coordinate the necessary access to conduct the vapor intrusion activities at the Site. The vapor intrusion investigation activities will include the collection of SSSG, IA, and AA samples from within and beneath the Site building. At least 24 hours prior to completing the SSSG and IA sampling, Matrix will complete a building walkthrough (Site inspection) and removal of any potential background sources. Matrix personnel will complete the NJDEP Indoor Air Building

ng the SSSG and IA sampling, Matrix will complete a building walkthrough (Site inspection) and removal of any potential background sources. Matrix personnel will complete the NJDEP Indoor Air Building Survey and Sampling Form for the Site. Based on the results of the 2023 vapor intrusion sampling activities and in accordance with the NJDEP May 2021 Vapor Intrusion Technical Guidance (Version 5.0), long term monitoring is required for the Site building. The May 2021 Vapor Intrusion Technical Guidance states that long term monitoring is required for a Site without a mitigation system installed as the appropriate mitigation action. The frequency of inspections and sampling events is based on the SSSG concentrations. Therefore, Matrix is recommending the completion of the following sampling plan for the 2025 heating season (Samples should be completed before March 31st). 1. Commercial – 25 Lakeside Avenue, West Orange, New Jersey (approximately 51,815 square feet) a. eight sub slab soil gas samples (three in the office area and five in the garage area), four indoor air samples (three in the office area and only one in the garage area break room), and one ambient air sample. Please note that indoor air samples will not be collected in the garage portion of the Site with the exception of the break room as operations in the garage area use, handle, or store the same investigative contaminants of concern (COCs) as found in the soils and groundwater. The IA/AA samples will be placed on hold and the SSSG samples will be analyzed for volatile organic compounds (VOCs) via USEPA TO-15 method. The IA/AA samples will be collected prior F:\2025\25-0037 West Orange DPW\Proposal\LTM VI Proposal\DPW_VI Sampling_1.17.2025.docx 2

to the SSSG samples. Each sample will be collected in a dedicated six-liter summa canister, placed at various locations throughout the buildings, with the AA canisters placed outside. The flow controller on the canister allows the air samples to be collected over a 24-hour period. At the conclusion of the 24-hour sampling event, Matrix will retrieve the IA and AA sample canisters and will prepare the SSSG samples. The SSSG samples will be obtained from below the buildings’ concrete slabs. Each SSSG sample will be collected from tubing inserted into a ½ inch diameter sample point. The annulus between the tubing and the temporary sample point will be sealed. Matrix will perform a leak test on the soil gas probe and all fittings of the sample train prior to sample collection in the laboratory supplied and calibrated 1-liter stainless steel canister with a flow controller. Following the collection of the SSSG samples, each drilled hole will be patched. At the conclusion of the sampling event, all air samples (SSSG, IA, AA) will be transported to a NJDEP Certified laboratory under a proper chain of custody. The samples will be analyzed for VOCs utilizing EPA TO-15 method. The results of the SSSG samples will be compared to the NJDEP Non-Residential Soil Gas Screening Levels (NRSGSL) and NJDEP Residential Soil Gas Screening Levels (RSGSL) to determine if the potential for a VI pathway exists. If the contaminants of concern are identified in the SSSG samples above the NJDEP RSGSL or NRSGSL, then the contingent IA/AA samples will be analyzed. The IA/AA samples will be compared to the NJDEP NRIARS, the NJDEP Non-Residential Rapid Action Levels (NRRAL), NJDEP RIARS, the NJDEP Residential Rapid Action Levels (RRAL), and OSHA and NIOSHA standards. If during the inspection cracks in the floor are identified and depending on the 2025 sampling results, Matrix may recommend floor repair cracks resampling of indoor air. An additional proposal would be prepared for this work, if required. Task 2: NJDEP Vapor Intrusion Preparation Following receipt of the analytical results, Matrix will prepare the NJDEP required Full Laboratory Data Deliverable Form and Vapor Investigation Finding Letter for review by the Township and LSRP of record. Matrix will not submit the vapor intrusion submission to the NJDEP, West Orange Health Department, and the New Jersey Department of Health.

inding Letter for review by the Township and LSRP of record. Matrix will not submit the vapor intrusion submission to the NJDEP, West Orange Health Department, and the New Jersey Department of Health. Please note that Matrix will not be able to submit to the NJDEP on behalf of the Township without being retained as Licensed Site Remediation Professional (LSRP) of record. Therefore, the LSRP of record, Manal Baba of CME will have to review and submit the analytical results and findings letter to the NJDEP as it requires LSRP signature or Matrix will have to be retained as LSRP of record for at least AOC-22 – Vapor Intrusion or the entire Site. Please see task 3 below for more details. The report will summarize investigation activities, results, findings, conclusions, and recommendations for the property. Please note that the Vapor Intrusion reporting is due to the NJDEP 30-days after final laboratory report is issued. Task 3: LSRP Retention In accordance with the SRRA, ARRCS, and the TRSR, Matrix will submit the LSRP Retention Form via the NJDEP Online Portal. The VI investigation summarized above for the subject site is being driven by groundwater exceedances identified in monitoring well MW-10 which is an upgradient well, indicating VI F:\2025\25-0037 West Orange DPW\Proposal\LTM VI Proposal\DPW_VI Sampling_1.17.2025.docx 3

impacts on-site may be due to contaminants migrating on-site from an upgradient, off-site source. However, this does not rule out the potential that the impacts identified in groundwater samples collected from MW-10 are not due to operations associated with the DPW property. The source of the impacts identified in MW-10 are not clear at this time. The LSRP of record for the DPW will be required to submit the results of sampling and all required NJDEP reporting. If Matrix is retained as LSRP of record for AOC-22 – Vapor Intrusion or entire Site, Matrix will submit the NJDEP Vapor Intrusion reporting that is required by the NJDEP within 30-days of final laboratory report is issued. In addition, in accordance with the TRSR, the person responsible for conducting the remediation of a contaminated site is required to perform public notification and outreach. Matrix will post a Public Notification sign and submit a revised public notification form to the NJDEP. In accordance with the NJDEP SRRA, the ARRCS, and the TRSR, the retained Matrix LSRP will oversee the investigation activities outlined above and if retained as the LSRP of record for the entire Site future remediation tasks as well. This task includes project management, NJDEP correspondence and coordination, and the anticipation of future conference calls and/or meetings with the project team. COSTS The following are the estimated costs not to exceed for the tasks described herein to complete the vapor intrusion activities at the DPW Site. All work will be conducted in accordance with the attached standard terms and conditions and LSRP Special Provisions. Task 1: Vapor Intrusion Investigations Labor .....................................................................................................................$ 5,770.00 Direct Expenses .....................................................................................................$ 8,610.00 Task 1 Total Estimated Costs ................................................................................ 14,380.00 Task 2: Prepare NJDEP Vapor Intrusion Submission Labor .....................................................................................................................$ 5,110.00 Direct Expenses .....................................................................................................$ 250.00 Task 2 Total Estimated Costs

...................................$ 5,110.00 Direct Expenses .....................................................................................................$ 250.00 Task 2 Total Estimated Costs ................................................................................ 5,360.00 Task 3: LSRP Retention and PM Labor .....................................................................................................................$ 1,760.00 Direct Expenses .....................................................................................................$ 460.00 Task 3 Total Estimated Costs ................................................................................ 2,220.00 ESTIMATED COSTS TASK 1 THROUGH TASK 3 ...............................................$ 21,960.00 ASSUMPTIONS AND EXCLUSIONS This proposal is based on the following assumptions: ▪ All field work will be completed in Level D personal protective equipment; ▪ All samples will be analyzed on a standard turnaround time basis, unless otherwise noted; ▪ All investigation derived waste will be disposed of as non-hazardous waste; ▪ No additional assessment or investigation activities or LSRP documents beyond the activities identified in the scope of work are included; F:\2025\25-0037 West Orange DPW\Proposal\LTM VI Proposal\DPW_VI Sampling_1.17.2025.docx 4

▪ ▪ ▪ ▪ All work will be completed during normal business hours; Costs exclude any NJDEP inspections; Costs do not include any additional NJDEP notification or reporting fees; and All external costs will be charged at cost plus 15%. Separate authorization from the client will be requested prior to commencing services outside the scope of this proposal. All out-of-pocket expenses including, but not limited to, application fees, laboratory testing costs, mylar copies, certified mailings, photographs, blueprints, and special deliveries are considered additional to the proposal items unless specifically noted within the scope of this proposal. This proposal is submitted solely and exclusively for the use of the Township of West Orange for consideration of the professional services of Matrix. Disclosure of this proposal’s content to any third party without prior written authorization from Matrix is expressly prohibited. In addition to the specific items as listed herein, the client may be required to demonstrate compliance with certain permit and approval conditions as may be imposed by one or more of the regulatory agencies. These conditions may require revisions to the plans and/or preparation of additional supporting documentation. This proposal does not include these additional items unless specifically outlined within the scope of this proposal. PAYMENT SCHEDULE Payment shall be in accordance with the Charges, Billing, and Payment schedule outlined in the Terms and Conditions attached to this proposal unless prior written arrangements have been made with Matrix. Please indicate your acceptance of this proposal by (1) signing in the space provided below, (2) signing the attached Terms and Conditions, and (3) signing the attached Special LSRP Provisions and returning one copy to our offices. We thank you for the opportunity to be of service to you on this project. Matrix is prepared to implement the described Scope of Work upon receiving a signed copy of this letter. If you have any questions or require any additional information, do not hesitate to contact us at (973) 2401800. Sincerely, Allison Molnar Project Manager Mark Sprengel, LSRP Project Manager Authorization to Proceed: Date: Name/Title Attachments: Terms and Conditions Special Provisions - LSRP F:\2025\25-0037 West Orange DPW\Proposal\LTM VI Proposal\DPW_VI Sampling_1.17.2025.docx 5

MATRIXNEWORLD Engineering Progress ATTACHMENT 1 TERMS AND CONDITIONS

TERMS AND CONDITIONS FOR PROFESSIONAL SERVICES Matrix New World Engineering, Land Surveying and Landscape Architecture, PC Section 1: SERVICES Matrix New World Engineering, Land Surveying and Landscape Architecture, PC (Matrix) agrees to perform the professional services (the “Services”) as described in the Proposal incorporated herein by reference for the CLIENT on a best efforts, time and materials basis, consistent with the applicable standard of care, under the terms and conditions set forth below. Matrix reserves the right to amend the contents of the Proposal, if written authorization is not received within 90 days. These Terms and Conditions together with the Proposal constitute the agreement between Matrix and the CLIENT for the Services (the “Agreement”). Section 2: COMPENSATION The CLIENT shall be responsible for all costs specifically enumerated in the proposal. For any costs set forth in the proposal as an estimated range, Matrix shall provide CLIENT with an exact cost as soon as it can be determined. CLIENT shall also be responsible for any REIMBURSABLE COSTS not specifically set forth in the proposal. REIMBURSABLE COSTS include: out-ofpocket expenses, the cost of which shall be charged at actual cost plus an administrative charge of fifteen percent (15%) and shall be itemized and included in the invoice. Typical out-of-pocket expenses shall include, but not be limited to, travel expenses (lodging, meals, etc.), job-related mileage at the prevailing IRS mileage rate, long distance telephone calls, printing and reproduction costs, and survey supplies and materials. Section 3: CLIENT'S OBLIGATIONS To assist Matrix in performance of the Services, CLIENT shall provide Matrix with appropriate material, data and information in its possession pertaining to the specific project or activity. Matrix shall be entitled to rely upon the accuracy and completeness of services and information furnished by the CLIENT and CLIENT’s consultants. The CLIENT will advise Matrix of the nature and extent of any hazardous waste at the site. If Matrix discovers after it undertakes the Services that the site is of a different nature of hazard as defined by the client, or if unanticipated hazards are presented, the CLIENT and Matrix agree that the scope of services, schedule and estimated budget fee shall be adjusted as needed to complete the work without injury or

or if unanticipated hazards are presented, the CLIENT and Matrix agree that the scope of services, schedule and estimated budget fee shall be adjusted as needed to complete the work without injury or damage. Unless otherwise specifically provided in this agreement, Matrix and its consultants shall have no responsibility for the discovery, presence, handling, removal or disposal of or exposure of persons to hazardous materials or toxic substances in any form at the project site. Section 4: INVOICE PROCEDURE AND PAYMENT Matrix will submit invoices to the CLIENT monthly and a final bill upon completion of the Services. Payment is due thirty (30) days from invoice date. CLIENT agrees to pay a finance charge of one and one-half percent (1.5%) per month, or the maximum rate allowed by law on past due accounts. CLIENT will be liable for all collection and court costs, disbursements, staff time expended for court appearances and depositions, and attorney's fees incurred in the collection of any outstanding invoices. Section 5: OWNERSHIP OF DOCUMENTS All survey notes, drawings, bills of materials, specifications, blueprints, reports, calculations, and all other material prepared by Matrix and its consultants in connection with the specific project, including those in electronic form, are Instruments of Service to be used solely with respect to this Project. Matrix and its consultants shall be deemed the authors and owners of their respective Instruments of Service and shall retain all common law, statutory and other reserved rights including copyright. Upon execution of Agreement, Matrix grants to CLIENT a non-exclusive license to reproduce the Instruments of Service solely for the purposes of constructing, using, and maintaining the Project, provided that CLIENT shall comply with all obligations, including prompt payment of all sums when due, under this Agreement. CLIENT shall not assign, delegate, sub-license, pledge or otherwise transfer any license granted herein to any other party without the prior written agreement of Matrix. Any unauthorized use and/or use of the Instruments of Service in violation of this Agreement, shall be at CLIENT’S sole risk and without liability to Matrix and its consultants, and CLIENT shall defend and indemnify MATRIX and its consultants against any claim and damages arising from such unauthorized use. The terms of this Section shall