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ANALYTE AL DATA <br /> Each groundwater sample was transported on ice in a light proof chest to American Analytics Laboratory. The <br /> samples were analyzed for total hydrocarbons (TPHg) and volatile aromatic compounds (BTEX) by EPA methods <br /> 8015 and 8020, respectively Table 1 presents a summary of the TPHg and BTEX data The complete laboratory <br /> reports for the current samples are included in Appendix B The results indicate the presence of TPHg in three <br /> of four wells on-site(ranging from less than detectable to 5 4 mg/L) Benzene concentrations ranged from 10 ug/L <br /> to 8,600 ug/L with the highest concentration noted in well MW-2 A benzene iso-con map is presented on Figure <br /> 3. <br /> CLOSING <br /> Based on the resent site investigation and monitoring program, it appears that the shallow water zone found beneath <br /> the site has been affected by the release of gasoline Based on the two monitoring events, the flow direction of <br /> groundwater across the site is generally to the south and south east Thrifty will continue to monitor the on-site <br /> wells on a quarterly basis If you have any questions, please contact me at(310) 923-9876 <br /> Very truly yours, <br /> Gl..VIL <br /> emico <br /> ter D'A <br /> Manager <br /> Environmental Affairs <br />