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.�00 <br /> 3800 Country Club Blvd. <br /> Page 2 <br /> analytical result of the grab water sample was 0.61 ppb Methyl tert-buytl Ether <br /> (MTBE) using EPA Method 8260, a degree of uncertainty exists for grab water <br /> sample analytical results. PHS/EHD recommends MTBE be analyzed for at <br /> least one quarter of groundwater sampling from monitoring wells. <br /> 4. Submit a work plan that will define the lateral and vertical extent of the soil <br /> and groundwater contamination in the area of the tank cluster to PHS/EHD <br /> by October 5, 1999. <br /> Your new point of contact at PHS/EHD for this site is Jeffrey Wong. All <br /> correspondence should be directed to him. Please feel free to call him at (209) 468-0335 <br /> if you have any questions. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> e frREHS Marrgari `'agono, S <br /> J yon g <br /> LOP/Site Mitigation Unit Supervisor <br /> c: RWQCB, Central Valley Region - Mark List <br /> c: Advanced GeoEnvironmental, Inc. - Timothy Cuellar <br />