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Canapes Car Wash Page 2 of 2 <br /> a 6230 Pacific Avenue 12/ 1 /2008 <br /> Stockton CA <br /> The EHD does not concur with AGE's proposal to perform fuel fingerprinting analysis . <br /> Impacted groundwater data are not suggestive of additional sources contributing to the <br /> groundwater contamination plume. The groundwater plume appears to be localized on <br /> site with high concentrations downgradient of the presumed source area and is <br /> delineated in the upgradient and cross-gradient directions. The EHD is not aware of <br /> other potential sources for the contaminants and none have been identified by AGE. <br /> Fuel "finger printing" has not been technically justified , and therefore the EHD does <br /> cannot approve the analysis . The EHD concurs with AGE's proposal to conduct a soil <br /> gas survey to evaluate the potential for vapor intrusion and to collect soil samples to <br /> evaluate the residual mass of petroleum hydrocarbons following soil remediation . <br /> The groundwater plume is not delineated vertically near the source area or laterally <br /> down-gradient from the source area and requires additional investigation . The EHD <br /> directs that work plans to conduct additional site assessment and to collect soil gas <br /> samples to assess the potential for vapor intrusion be submitted to the EHD for review <br /> by January 14, 2008. <br /> If you have any questions, please contact Frank Girardi , Senior Registered <br /> Environmental ealth Specialist at (209) 953-7868. �f / <br /> ti '.000 <br /> Frank Girardi , REHS Nuel C . Henderson, Jr. , PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> C: James Barton, RWQCB, 11020 Sun Center Dr. #200, Rancho Cordova , CA 95670 <br /> C : Daniel Villanueva , AGE , Project Manager, AGE , 837 Shaw Road , Stockton , CA 95215 <br /> 081208directive <br />