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y r <br /> / 1 <br /> HI�ALTH SERVIC ESPUBLICOPS", <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> I 'qL/FORc� <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> ROBERT COCHRAN MAY 0 3 2009 <br /> CHEVRON PRODUCTS COMPANY <br /> P O BOX 6004 <br /> SAN RAMON CA 94583-0804 <br /> RE: Chevron Service Station 9-1452 <br /> 334 East Main Street <br /> Ripon,CA 95366 <br /> On April 26,2001, San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/EHD)received a report titled"Site Assessment Work Plan from SECOR International <br /> Incorporated(SECOR). The work plan was written on your behalf and proposes installing three <br /> soil borings to collect soil and groundwater data,reviewing the subsequent data, and possibly <br /> destroying monitoring wells MW-1,MW-2, and MW-3. Although the text and figures do not <br /> reference MW-4, it is assumed that MW-4 will be included as well. <br /> The plan to install three soil borings for the purpose of collecting additional soil and groundwater <br /> data is approved. Be advised that the Central Valley Regional Water Quality Control Board <br /> requires analysis for methyl tertiary butyl ether;tertiary butanol, di-isopropyl ether, ethyl-butyl <br /> ether,tertiary-amyl methyl ether, 1,2-dichloroethane ethylene dibromide,methanol, and ethanol <br /> prior to closure consideration. <br /> All subsurface borings within San Joaquin County require permits. Obtain the necessary drilling <br /> permits from San Joaquin County prior to commencing drilling operations, and adhere to San <br /> Joaquin County as well as State well standards. The proposed work should begin within 45 days <br /> of the workplan approval date. <br /> If you have any questions,please do not hesitate to call Dot Lofstrom at(209)468-3436. <br /> Donna Heran,RENS,Director <br /> Environmental Health Division <br /> Dot Lofstrom,R.G. <br /> LOP/Site Mitigation Unit <br /> cc: Marty Hartzell,CVRWQCB <br /> Scott Gable, SECOR <br /> A Division of San Joaquin County Health Care Services <br />