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2. Install a deep soil bore hole at the east end of the former diesel USTs (This will be <br /> converted to groundwater monitoring well MW-1). See Figure 3. <br /> 3. Install two (2) groundwater monitoring wells, MW-1 and MW-3. MW-1 will be located at <br /> the east end of the former diesel USTs. MW-3 will be near South El Dorado Street, <br /> south of the main office. See Figure 3. <br /> 4. Install a soil boring (B-5) located between MW-2 and MW-1. See Figure 3. <br /> 5. Survey the elevations of the tops of each well casing. <br /> 6. Develop MWA and MW-3 and determine the groundwater elevations at MW-1, MW-2 <br /> and MW-3. Determine the groundwater flow direction by triangulation of the <br /> groundwater elevations of the three (3)wells. <br /> 7. Sample groundwater monitoring wells MW-1, MW-2 and MW-3 quarterly and analyze <br /> for TPHg, TPHd, TPHo, BTEX, MTBE, TBA, DIPE, ETBE and TAME. Depending upon <br /> only be necessary to continue to monitor groundwater. <br /> the results achieved, it may y ry <br /> However, p 9 <br /> if unexpected results such as floating hydrocarbons or high levels of <br /> cleanup institute contamination occur, it may be necessary to in s p measures. <br /> 8. Two cleanup alternatives are available. (1) If the contamination present in the soil is <br /> high, the contaminated soil can be removed and disposed of to an approved site. (2) If <br /> the contamination present in the soil is low, then the soil should remain in place for <br /> eventual cleanup by natural soil bacteria. Groundwater monitoring will show if any <br /> contaminants migrate from the soil to the groundwater. If significant groundwater <br /> contamination is encountered, it may be necessary to institute pump and treat cleanup <br /> measures. <br /> i <br /> Envirog, 1 neerin Inc. Project No.98-012.01 7 <br />