59-24 Proposal - Fire House No. 4.pdf

October 9, 2023 Mr. Leonard R. Lepore, PE, Municipal Engineer Re: Proposal for West Orange Fire House #4 Page 3 Task 1: Monitoring Well Installation and Sampling CME will retain a licensed driller to install one (1) monitoring well (MW-13) to a depth of approximately (30) feet below ground surface (bgs) to be located at the source area (Old Fueling Pump).The proposed monitoring well will be used for applying proposed High Vacuum Extraction. The well will be completed with a flush-mount cover. Drill cuttings will be placed in drums and properly disposed off-site at a licensed facility, and development water will be drummed for off- site disposal or properly treated prior to on-site discharge. A professional licensed surveyor will survey the monitoring well. Well logs and Form A and Form B will be prepared to properly document the well construction. Two weeks after the completion of the well installation, a groundwater sample will be collected from MW-13. The groundwater sample will be analyzed for TCL VO+15, TBA, and/or BN+15. Task 2: Monitoring Well Gauging & Sampling (Semi-annual - Two Rounds) Perform two semi-annual groundwater sampling events at the Site. Collect samples from the existing monitoring wells (MW-2 through MW-11R and proposed well MW-13). Groundwater samples will be obtained in accordance with the NJDEP Field Sampling Procedures Manual (August 2005). Groundwater samples will be analyzed for TCL VO+15, TBA, and/or BN+15. A QA/QC plan consisting of field and trip blank samples will be incorporated into the sampling program. Purged groundwater will be containerized in drums and disposed off-site at an approved disposal facility. All sampling and monitoring will be performed according to the methodology specified in the most current edition of the Department's Field Sampling Procedures Manual. All samples will be analyzed by a New Jersey Certified Laboratory except those field-determined parameters specified in the monitoring program established pursuant to the oversight document. Task 3: Application of High Vacuum Extraction (HVE) Treatment System High Vacuum Extraction (HVE) treatment system utilizes a soil venting unit which is powered by an internal combustion engine to produce vacuum to extract groundwater and soil vapors from the extraction point. The removal of contaminated groundwater, as well as subsurface vapors, will reduce contaminant

nal combustion engine to produce vacuum to extract groundwater and soil vapors from the extraction point. The removal of contaminated groundwater, as well as subsurface vapors, will reduce contaminant mass; as such, it will aid in overall remediation of dissolved phase groundwater contamination and residual product in soil.