ARCHIVED REPORTS_XR0007093 - Laserfiche WebLink

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chest, and cooled to 4°C The samples and accompanying chain-of-custody documentation will be delivered to a California State certified analytical laboratory CERTIFIED LABORATORY ANALYSES OF SOIL AND WATER SAMPLES A minimum of five soil samples will be selected from each monitor well boring for analysis by a certified analytical laboratory All hydropunch groundwater samples collected will be analyzed by a certified analytical laboratory The soil and groundwater samples will be analyzed for concentrations of TPH-G using EPA method 8015M, BTEX and MTBE using EPA method 8020 and total lead using EPA method 6010 The soil and groundwater samples exhibiting the highest MTBE concentrations by EPA method 8020 will also be will also be analyzed for MTBE by EPA method 8260 If necessary, additional soil samples from a soil boring will be analyzed to bracket the vertical extent of soil contamination in the borehole DISPOSITION OF SOIL CUTTINGS AND WASTE WATER All soil cuttings generated from the drilling of the monitor wells will be stored on and covered with 6-ml polyethylene sheeting to prevent runoff or leaching to the uncontaminated soil The stockpiled soil will be stored on-site A composite soil sample will be collected from four locations within the soil pile and labeled and preserved as described for the soil boring samples The composite sample will be analyzed for the constituents listed in the section using those same laboratory methods The final idisposition of the cuttings will be determined following the receipt of certified analytical laboratory results Rinse water from the washing of the augers and sampling equipment will be stored on- site in labeled 17H 55 gallon DOT approved drums The rinse water will be transported to the Evergreen Inc recycling facility under a non-hazardous waste manifest along with the wastewater generated by quarterly groundwater monitoring COMPLETION OF MONITOR WELLS Monitor wells completed in only the upper zone (0-50 feet bgs) will be completed from 20-40 feet bgs with machine slotted SCH 40 TriLock 2 inch diameter PVC screen (0 01) The well will be completed to surface with blank SCH 40 TnLock 2 inch diameter PVC The sand envelope will consist of 42116 Lapis Lustre sand and will be positioned from the base of the well to 0 5 feet above the top of the slotted casing The sand envelope will be sealed on top with a 1-foot layer of hydrated bentonite pellets Neat cement (with less than 5% bentonite) will be used to seal the annular space from the top of the bentonite seal to surface A locking thermos cap will be used to seal the casing orifice A steel traffic box fitted with a locking system and well ID tag will be set in concrete to protect the exposed well casing 6 ARC PUMP -WKPLN- 9128199