226-22 - Attachment - 25 Lakeside Avenue New Areas of Concern and CME Proposal.pdf

CMe ASSOCIATES Mr. Leonard R. Lepore, PE August 26, 2022 Municipal Engineer/Director of Public Works Page 4 of 10 Re: Department of Public Works at 25 Lakeside Avenue — Site Investigation CME will retain the services of a qualified drilling contractor (Geoprobe operator) to perform direct-push soil borings and advance borings in all the AOCs at the Site where soil and groundwater investigation was recommended in the PA. Please note that some of the AOCs will be investigated (including 15 soil borings) during the soil and groundwater delineation around MW-9 (Oil impacts investigation), which is included in the previous Proposal (July 28, 2022). Up to twenty-five (25) soil borings and samples will be advanced to depths that range between approximately five (5) to twenty (20) feet below ground surface (ft bgs). Four of the soil borings will be installed at shallow depths up to 2 feet bsg deep. CME personnel will log all borings and will utilize a photoionization detector (PID) to screen for the presence of volatile organic compounds (VOCs). All boring locations will be surveyed using GPS equipment. The soil samples at each AOC location will be analyzed for different parameters, including Extractable Petroleum Hydrocarbons (EPH) Category 2, 25 percent of samples where EPH is detected will be analyzed for EPA Target Compound List volatile organic compounds (TCL VO+TICs), semi volatile organic compounds including 1-Methyl Naphthalene (TCL SVO+TICs) with a library search of the fifteen (15) highest Tentatively Identified Compounds (TICs) or PAHs, PCBs, TAL Metals Pesticides and Hex Chromium. All soil samples will be submitted to a NJDEP-certified analytical laboratory for analysis. Based on the regional geology at the site vicinity, it is expected that the subsurface materials encountered will consist primarily of shale bedrock. Per NJDEP guidance and the TRSR, CME will direct the drilling contractor to install up to four (4) PVC temporary well points to assess groundwater beneath the area of investigation. One (1) groundwater sample will be collected from each temporary well point utilizing a dedicated, disposable bailer. The temporary well points will be removed following sample collection. All groundwater samples will be submitted for laboratory analysis for TCL VOCs, tertiary butyl alcohol (TBA), TCL SVOCs and TAL Metals in accordance with the TRSR and

oved following sample collection. All groundwater samples will be submitted for laboratory analysis for TCL VOCs, tertiary butyl alcohol (TBA), TCL SVOCs and TAL Metals in accordance with the TRSR and NJDEP guidance documents. Trip blank samples will accompany the groundwater sample (s) and will be analyzed for TCL VOCs. One (1) field blank sample will also be collected each day of field activities. The field blank(s) will be handled and transported in the same manner and analyzed for the same parameters as the samples collected that day.