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TPH-g, BTEX, and MTBE concentrations appear in Table 1 and Appendix B The TPH-g, <br /> benzene, and MTBE isoconcentration maps are presented in Figures 2, 3, and 4. The only <br /> detectable concentrations of TPH-g, benzene, and MTBE were found in well MW-11 (2,140 ug/L, <br /> 1 9 ug/L, and 1,350 ug/L), respectively None of the other wells had any detectable hydrocarbons <br /> Since the third quarter of 1997, Thrifty has analyzed for the requested oxygenates di-isopropyl <br /> ether, ethanol, ethyl-tert butyl ethyl, methanol, tert-amyl methyl ether, tert-butanol, and MTBE by <br /> method 8260 For the Second Quarter 2000, the only oxygenate detected was MTBE at 1,350 ug/L <br /> (in well MW-11) No other oxygenates were detected above laboratory method detection limits The <br /> analytical laboratory results are presented in Appendix B <br /> Summary and Recommendations <br /> On December 7, 1999, the San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) approved The Corrective Action Plan(CAP), August 18, 1999) for this site <br /> Thrifty has forwarded the bid proposals package for site remediation to the State Cleanup Fund <br /> (SCF) for approval, and is currently selecting a contractor to perform the remediation system <br /> installation The remedial installation activities include acquisition of all necessary permits, <br /> installation of gas and electrical service lines, delivery and hookup of the thermal oxidizer and <br /> groundwater treatment equipment,and start-up of the remedial system These activities are expected <br /> to be initiated during the Third Quarter 2000, with system start-up expected by late third quarter or <br /> early Fourth Quarter 2000 <br /> Thrifty will continue quarterly groundwater monitoring, gauging, purging and sampling of all <br /> groundwater monitoring wells <br /> All interpretations expressed in this report are based upon review of data collected by EMC <br /> Written by ,b-AAAA Reviewed by <br /> p� YI1tONAf£,1��6� <br /> °o p c Fflr� R��' ® ��p;ED QEOf <br /> � <br /> Q p 5e, Nom► <br /> e o * No 549 <br /> and C IF r IK ri REA Ioa a4� Larry iginbot am % <br /> Project Manager, MBA CA F0 Registered Geologist #5 OF CAS-SFO <br /> Senior Hydrogeologist <br />