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Scott T Hooton <br /> Team Leader <br /> BPAmoco <br /> BP Amoco Oil Corporation <br /> 295 SW 411 Street <br /> �y Bldg 13 Suite N <br /> Renton�� WA 98055 <br /> 06 <br /> 425!251 0689 425/251 0736 FAX <br /> August 24, 2000 <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Attention Mr Michael Infurna- Senior REHS <br /> 304 East Weber Avenue,Third Floor <br /> P O Box 388 <br /> Stockton, CA 95201-0388 <br /> RE BP Oil Site No 11 192 <br /> 1403 Country Club Blvd <br /> Stockton, CA 95204 <br /> Dear Mr Infurna <br /> This letter transmits the Third Quarter 2000 Groundwater Monitoring report prepared on behalf of BP by <br /> Blaine Tech Services <br /> The enclosed report summarizes chemical data and groundwater elevation measurements collected from <br /> seven wells, beginning during May, 1990 Upon review of the results, you will note that aromatic petroleum <br /> hydrocarbons were detected in samples obtained from wells MW-3 and MW-7 on 14 July 2000 <br /> MTBE was also detected in samples obtained from all of the wells sampled on 14 July 2000 Concentration <br /> data and water elevation measurements for the three wells with the highest MTBE concentrations associated <br /> with the third quarter 2000 are depicted below <br /> MW-3 TPHg, MTBE&Water Elevation <br /> 120000 0 <br /> 100000 <br /> 18/94 Tosco Purchases <br /> Site -5 <br /> 80000 <br /> -10 - - 0 - -TPHg <br /> rn 60000 U) —-e MTBE <br /> 3 <br /> _75 -- 0 Water Elevation <br /> 40000 <br /> I <br /> 20000 -20 <br /> 0 2 -25 <br /> O N N M M V 0 iii W O m M Q O <br /> O 6'f 6'� Q7 Cn m R1 Q� 01 O O <br /> N N <br /> 6l 6? 61 4-, N F-, 5 8 C7 e0 e V O V <br /> to N N r- V 0 <br />