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ANALYTICAL 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 to Appendix B The results indicate the presence of TPHg in two of <br /> four wells on-site(ranging from less than detectable to 1 6 mg/L) Benzene concentrations ranged from less than <br /> 0 5 ug/L to 1,500 ug/L with the highest concentration noted in well MW-2 A benzene iso-con map is presented <br /> on Figure 3. <br /> CLOSING <br /> Based on the resent site investigation and momtoring program, it appears that the shallow water zone found beneath <br /> the site has been affected by the release of gasoline Based on the momtonng 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 /> �0*' <br /> Peter D'Anuco <br /> Manager <br /> Environmental Affairs <br /> i <br /> i <br />