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Mr Kyle Christie <br /> April 14, 1995 <br /> Page 4 <br /> collected from wells MW-3 and MW-4 The benzene and TPH-G concentrations in the <br /> sample collected from well MW-5 were 5 1 micrograms per liter (pg/1) and 570 pg/l. <br /> The soil generated during drilling was temporarily stored on site enveloped in plastic sheeting <br /> At the completion of drilling, a sample of the stockpiled soil was collected and submitted to <br /> the laboratory for analysis of BTEX and TPH-G using EPA Method 5030/8020, 8015 <br /> Modified, and Soluble Threshold Limit Concentration lead (STLC-lead). The laboratory <br /> results of this sample were forwarded to Dillard Environmental Services The soil was <br /> removed from the site and disposed of in the Browning Ferns Industries (BFI) landfill located <br /> in Livermore, California on March 6, 1995 Appendix J of this report contains the soil <br /> disposal documentation <br /> Conclusions <br /> Analytical results of the soil samples collected during this and previous investigations indicate <br /> that the extent of hydrocarbons has been defined in the soil at ARCO Facility 2133. Based <br /> on the results of this and previous investigations at the site the hydrocarbon affected <br /> groundwater has been defined to the west, south, and east. Hydrocarbons identified in the <br /> groundwater on the north side of the site may be co-mangled with hydrocarbon affected <br /> groundwater from the Chevron facility located across Benjaman Holt Drive to the north. <br /> Monitoring wells MW-3 through MW-5 will be incorporated into the quarterly groundwater <br /> monitoring and sampling program at this site. <br /> If you have any questions regarding this report, please contact me at (916) 44.4-0123. <br /> Sincerely, <br /> BROWN AND CALDWELL <br /> brg <br /> S eve Misner Ja L as <br /> Protect Manager California Registered Geologist#4301 <br /> SM:JCL:ksc <br /> Enclosures <br /> cc: Ms. Diane Hinson, San Joaqum County <br /> Mr. Brett Hunter, Chevron <br /> Ms. Elizabeth Thayer, California Regional Water Quality Control Board, CVR <br /> Use or disclosure of data contained on this sheet is subject to the restriction specified at the beginning of this <br /> document <br /> 195ZREP0RTS\VAELLNSTL.RPT <br />