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Advanced <br /> GeoEnvironmental, Inc . <br /> 29 March March 20 i 0 <br /> AGE-NC Project No. 02-09628 <br /> Mr. Mike Infurna <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton, California 95201 <br /> Subject: No Further Action Evaluation <br /> VANCO TRUCK&AUTO PLAZA <br /> 1033 West Charter Way,Stockton, California <br /> Dear Mr. infurna: <br /> On behalf of Mr. David Atwater of Van De Pol Ente rises, Advanced GeoEnvironmental, Inc. <br /> (AGE)has prepared this No Further Action Evaluation for Vanco Truck&Auto Plaza, located at <br /> 1033 West Charter Way, Stockton CA(site). <br /> In a letter dated 06 November 2009,the San Joaquin County Environmental Health Department <br /> (EHD)directed the preparation of a document that addresses the issues of gross contamination and <br /> direct exposure from petroleum hydrocarbon-impacted soil remaining at the site and that evaluates <br /> the site for no further action.AGE believes that residuals it contamination left in place will not pose <br /> a significant threat to human health or to the environme t based on the following: <br /> • Total petroleum hydrocarbons as diesel(TPH-d)A vere not detected above San Francisco Bay <br /> Regional Water Quality Control Board's Environmental Screening Levels(ESLs)for gross <br /> contamination and direct exposure in the majority (19 out of 25) of shallow soil samples <br /> collected from the site.Additionally,xylene and ethyl tertiarybutyl ether(MTBE)were not <br /> detected above the ESLs for gross contamination and direct exposure in any of the soil <br /> samples collected from the site. <br /> • The Vanco site is surfaced by either concrete or a phalt,thereby creating an effective barrier <br /> for potential soil-vapor exposure. <br /> sa The Vanco mini-mart building was built on concrete slab, thereby creating an effective <br /> barrier for potential soil-vapor exposure. <br /> I <br /> • Diesel is a longer-chain(i.e. heavier) hydrocarb n and is not generally considered-to be a <br /> volatile compound. <br /> • Diesel has not been identified as a "known carcinogen" by either the Environmental <br /> Protection Agency nor.the California Environ m ntal Protection Agency. <br /> • The Vanco site will remain a commercial petroleum fueling station forthe foreseeable future. <br /> 837 Shaw Road,Stockton,California 95215 <br /> Telephone(209)467-1006 Fax 209)467-1 118 <br />