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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 (5,000 ug/L, <br /> 1,440 ug/L,and 1,110 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 methyl tert- <br /> butyl ether(MTBE)by method 8260 For the First Quarter 2000, results above detection limits were <br /> detected in monitoring well MW-11 for MTBE at 1,110 ug/L No other oxygenates were detected <br /> above laboratory method detection limits The analytical laboratory results are presented in <br /> Appendix A <br /> Summary and Recommendations <br /> On December 7, 1999, the San Joaquin County Public Health Services, Environmental Health <br /> Division(PHSIEHD) approved The Corrective Action Plan ((CAP), August 18, 1999) for this site <br /> Thnfty is in the process of acquiring the necessary equipment and utilities(gas and electrical) which <br /> will be installed on this site for remediation, and will initiate permitting with the San Joaquin Air <br /> Pollution Control District for vapor discharge and the Stockton Sanitation District for the water <br /> discharge Once all the necessary permits have been obtained, the system(s) will be installed,tested <br /> for operational problems,and when this has been completed placed into operation If one permitting <br />• process is completed before the others (vapor or water), then whichever process is completed first, <br /> that system will be placed into operation <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 Reviewed by <br /> �,✓Ro�rr��r��a FtED GF0 <br /> F-x •- in <br /> No 0027 �e� p Q Q'f f��•ldl ` PA <br /> p�rea` 'c <br /> c b No <br /> r <br /> and C 1�riednchs � A II4oe Larry Higinbotham 9�� �Q- <br /> Project Manager OFCALI+a®4 Registered Geologist 49F C;a��F <br /> Senior Hydrogeologist �vv <br /> i <br />