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Supplemental Investigation Report,Problem Assessment Report and Work Plan <br /> Cleanup and Abatement Order No 5-00-707_ EAI Project No 1232 <br /> concentrations are similar to concentrations observed in this well in September 1998 (see Table <br /> 1) <br /> Wards wells MW-1 through MW-7 are all located in the dee and these wells are <br /> g P zone <br /> sampled as part of ground water monitoring efforts Other wells owned by Wards are shallow <br /> wells (vapor extraction) that are connected to the remediation system (see Table 3) If <br /> necessary, ground water samples could be collected from these wells However, since air <br /> sparging is occurring at the Wards site in deep wells, with vapor extraction from both shallow <br /> and deep wells, sampling and testing ground water from these shallow wells does not appear to <br /> be warranted at this time Further, such sampling would require shutdown of the system and <br /> removal of equipment present in these wells <br /> 4,3 Robinhood Irrigation Well <br /> Operation of the RIW changes and influences the natural ground water flow direction for the <br /> area (see Section 4 2 1) Since the RIW is screened at various intervals beginning at depths as <br /> shallow as 40 feet bgs and terminating at deeps as deep as 322 feet bgs, with strata not sealed <br /> against pollution (see Section 2 1), operation of this well has drawn the hydrocarbons from <br /> beneath the Wards and Unocal sites to the well The extent of impact, both vertically and <br /> 1 laterally, around the RIW has not yet been defined <br /> M <br /> 1 <br /> • <br /> BS 1232P IRW_WP -12- <br /> ENVIRONMENTAL AUDIT, INC.® <br />