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Revised Monitoring and Reporting - 2 _ • ` <br /> 12 October 1994 <br /> 16 South Cherokee Lane, Lodi { <br /> 1 <br /> shown contamination, and may be considered a control well (as is MW2). MW12 is n <br /> downgradient and contaminated; it has not yet been demonstrated that the bacteria will migrate • <br /> downgradient. MW7 is contaminated and cross gradient; it has not been demonstrated that the <br /> bacteria will move cross gradient. MW 8, MW9, MWll, MW14, and EWl were inoculated and <br /> chosen as representative of the contaminated zone. <br /> Nitrogen monitoring was left off your vapor monitoring table. However, the text on page 4 of <br /> your report indicates that you intend to sample for it. Also, regarding methane and nitrogen <br /> monitoring, we chose inoculated monitoring wells, two dry and one containing water, because <br /> more environmental conditions were encountered in monitoring wells than vapor wells. You <br /> provided no explanation for recommending that vapor wells be used rather than the monitoring <br /> wells we suggested. <br /> We require that the genera of the bacteria in soil and ground water samples be provided. We are <br /> able to accommodate concerns regarding proprietary information. <br /> Additional comments will be accepted up to 31 October 1994. We intend to issue the final <br /> RMRP by early November 1994. If you have any questions, call me at (916) 255-3133. <br /> LI H A. THAYER <br /> Associa E1 <br /> • <br /> Enclosure <br /> cc: Harlin Knoll, San Joaquin County Environmental Health, Stockton <br /> James DeMera, Mullen, Sullivan & Newton, Lodi <br /> Robert Marty, Geological Audit Services, Stockton <br />