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Working To Restore Nature <br /> SCOPE OF WORK <br /> The following scope of work is based upon the information outlined above The work is <br /> designed to remove hydrocarbon impacted soil in the vicinity of monitoring well MWi to a <br /> depth of approximately 18-20 feet below grade All field work will be performed in accordance <br /> - - with-an approved-Site Safety Plan - - -- - - - - -- <br /> Soil Excavation and Sampling <br /> To prevent residual hydrocarbons in the soil from acting as a source of groundwater degradation, <br /> the soil in the vicinity of boring MW 1 will be excavated to remove contaminated soil associated <br /> with the former underground fuel storage tanks An excavator tractor capable of excavating to <br /> a depth of approximately 18 to 20 feet will be used It is estimated that up to 5,000 cubic yards <br /> of material will be excavated No soils will be excavated from within the saturated zone If <br /> possible, clean overburden will be separated on site prior to stockpiling A Flame Ionization <br /> Detector (FID) will be used during excavation to assist in evaluating the lateral extent of soil <br /> impaction Backfilling of the tank pit will be accomplished using native material from other site <br /> localities <br /> Following excavation, confirmation samples will be collected from the excavation pit to verify <br />�) source removal One sample will be collected for every 20 linear feet of each sidewall and one <br /> for every 400 square feet of the excavation floor The exact location of samples will be <br /> determined in the field under the direction of PHS/EHD <br /> All confirmation soil samples will be collected from the excavator bucket at least 3-inches below <br /> the surface of the soil The samples will be collected into prewashed brass liners Each liner <br /> will be sealed with Teflon sheet and plastic caps, secured with duct tape, sealed in air-tight bags, <br /> and preserved on ice pending shipment to a state-certified laboratory <br /> Soil samples will be transported under chain-of-custody to state-certified Sequoia Analytical in <br /> Redwood City, California for analyses Samples will be analyzed for benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) using EPA method 8020 and total petroleum hydrocarbons <br /> as gasoline (TPHg) and diesel (TPHd) using modified EPA method 8015 In addition, selected <br /> soil samples, based upon location and field observations, may be analyzed for halogenated <br /> volatile organics by EPA method 8010 <br /> Soil sample collection and transport will be performed in accordance with an approved Quality <br /> Assurance and Quality Control Plan <br /> 0W04021R6P0RTSIWP 1193 FNL 3 <br />