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L <br /> ENVIRONMENTAL HEALTH EPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> Donna K.Heran,R.E.H.S. Carl Bor an,R.E.H.S. <br /> Director 304 East Weber Avenue,Third Floor Mike Huggins 1R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> c4�ikoRa�PProgram Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 <br /> Mark Barcellos,R.E.H.S. <br /> MAY 12 2003 <br /> PAUL VERMA <br /> CITY OF TRACY <br /> 520 TRACY BLVD <br /> TRACY CA 95376 <br /> RE: Wastewater Treatment Plant SITE CODE: 2330 <br /> 3900 Holly Drive <br /> Tracy CA 95376 <br /> San Joaquin County Environmental Health Department(SJC/EHD) has reviewed "Soil and <br /> Groundwater Initial Site Assessment'dated April 7, 2003, submitted on your behalf by Wright <br /> Environmental Services, Inc. and has the following comments. <br /> The report documents site investigative fieldwork that took place in February 2003. Four <br /> geoprobe direct push soil borings were advanced; soil and grab groundwater samples were <br /> collected for analysis. The borings were located in the area of the former underground storage <br /> tank, and at locations suspected to be down gradient from the tank. Laboratory analytical results <br /> documented total petroleum hydrocarbons as diesel (TPHd)impacting groundwater at each <br /> boring location. <br /> The report recommends that no further investigation of this site be conducted. However, per the <br /> California Code of Regulations, Title 23, Chapter 16, Article 11, section 2725, all responsible <br /> parties to contaminated underground storage tank sites must conduct an investigation to define <br /> the vertical and lateral extent of the unauthorized release. <br /> You are directed to submit a work plan to continue the investigation at this site,to define the <br /> lateral and vertical extent of the contaminant plume, and to install groundwater monitoring wells. <br /> In addition, a sensitive receptor/well survey must be completed that identifies all municipal, <br /> domestic, agricultural, industrial or other wells located within 2000 feet of the site. The work plan <br /> and receptor survey are due by August 25, 2003. In addition, please provide to SJC/EHD copies <br /> of the chromatograms from the EPA Method 8260 groundwater analyses previously performed. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Lori Duncan, Senior REHS Nuel C. Henderson, Jr., RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: James L.L. Barton, CVRWQCB <br /> John Lynch,Wright Environmental <br />