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Proposed sample frequency for the analysis of MtBE should be reduced to semiannual for wells <br /> MW2,MW4,MW6A, MW8A and MW9A and annually for wells MW6B,MW8B and MW9B. <br /> The pumping well MW 10 needs to be sampled monthly to correspond to-the required monthly <br /> sewer discharge sample and to evaluate the reduction in concentration achieved by groundwater <br /> pumping. MW 10 should be analyzed for TPHg, BTEX,MtBE and TBA. Also depth to water <br /> measurements from all wells should be obtained during the monthly sampling of pumping well <br /> MW 10 to evaluate the, influence that pumping from MW 10 is having on the groundwater plume. <br /> As mandated by the sewer discharge permit,weekly inspections to the treatment system and <br /> monthly samples of the influent are required. <br /> Western Geo-Engineers is requesting that the.above sampling schedule be implemented starting <br /> in July 2009. . <br /> Respectively submitted, <br /> George CunverW Jack E.N. <br /> Project Geologist Ca. Reg. Geologist#-637 <br /> Cc: Mrs. Manual Sanchez <br /> Mr. Michael Infurina, San Joaquin County Health <br /> Mr. James L.L. Barton, CRWQCB-CVR <br />