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i <br /> • Mr. Bruce Tuter <br /> Page 2 <br /> i <br /> City, California (FLAP #1210) The samples were analyzed for total purgeable <br /> petroleumhydrocarbons (TPPH) using modified EPA <br /> method 8015, and for benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) using EPA method $020. <br /> ' The laboratory reports are included in Attachment B and are summarized in Table 1 Based on <br /> the TPPH and benzene concentrations and the effluent volume factor of 1 33 x influent volume, <br /> the destruction efficiency of the VES was approximately 99% <br /> Since the PID readings were not representative of the laboratory results, Ground Zero has been <br /> using a flame ionization detector (FID) Therefore, FID readings will be recorded on all future <br /> systems monitoring data sheets <br /> If you have any questions or require additional information regarding the VES, please contact <br /> Ground Zero at your convenience <br /> r <br /> F Respectfully, <br /> Ground Zero Analysis, Inc <br /> � I <br /> ort-U Gfp\ <br /> Jeanne Buckthal •� �o`. <br /> Staff Geologist r �� <br /> 1 GREGORY P -+1 <br /> No 5023 <br /> E Gregory P Stahl, RG 5023 <br /> CA Certified Hydrogeologist 264 CA�1 `'� <br /> f Attachments <br /> E <br /> PC Mr Carl Knowles <br /> Mr Ron Rowe, San Joaquin County PHS/EHD <br /> fi Mr James Lewis, Law Offices of Patrick D Riddle <br /> i <br /> MCVVearPt110198rept <br /> r <br />