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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Donna K Horan,R E N S l Borgrnit an,R E s <br /> 304 East Weber Avenue,Third Floor Carl Bgins,R,R E H s <br /> a <br /> N <br /> Dereclor Mike Huggins,R E H S ,R D[ <br /> Ai Olsen,R E H S Stockton, California 95202-2708 Douglas W Wilson,R E H S <br /> o NPPiogromManager Telephone (209) 468-3420 Margaret Lagorio,R E H S <br /> rF se Laurie A Cotulla,R E H S <br /> Fax (209)464-0138 Robert McCletlon,R E H S <br /> Program Manager Mark Barcellos,R E H S <br /> 7-ELEVEN CORP. APR 111114 <br /> KEN HILLIARD <br /> P O. BOX 711 APR 15 2004 Z, <br /> DALLAS, TX 75221-0711 <br /> s auQ��a..n._ <br /> RE 4627 DaVinci SITE CODE 1047 <br /> San Joaquin County Environmental Health Department(EHD) is the lead agency providing the <br /> oversight of the Investigation and cleanup of releases from underground storage tanks (USTs) <br /> within San Joaquin County EHD has a contract with the California State Water Resources <br /> Control Board to conduct a UST corrective action program The above referenced site was <br /> placed in the EHD Local Oversight Program (LOP) in March, 1997 <br /> A soil and ground water investigation has been conducted at the above referenced site and <br /> contamination has been documented The vertical and lateral extent of soil and ground water <br /> contamination has not been fully defined with the information obtained from the existing 7 <br /> monitoring wells installed on site The analytical results of the ground water from MW#7, <br /> located down gradient on the southwest portion of the property, have shown high concentrations <br /> of both MTBE and TBA <br /> You are directed to continue with your investigation and define the full extent of soil and ground <br /> water contamination caused by the unauthorized release from the USTs After the extent of <br /> contamination is defined, you will be required to conduct feasibility testing and perform <br /> corrective action <br /> Please submit a Work Plan, an EHD well permit application, and $89 00 permit fee to perform <br /> additional investigation and sampling by June 1, 2004 <br /> If you have any further questions regarding this matter, contact Harlin Knoll at (209)468-3442 <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> A�� k--,O-q <br /> Harlin Knoll, Senior REHS Margaret Lagono, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> Cc Howard N Sweet <br /> Secor-Bnan Carey <br />