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1 <br /> PUBLICHET.ALH <br /> SERVIC <br /> ,o.. r x, <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Web& Avenue, Third Floor • Stockton, CA-95202 <br /> 209/468-3420 <br /> PAUL SUPPLE <br /> ARCO PRODUCTS COMPANY <br /> PO BOX 6459 - <br /> MORAGA,CA 94570 <br /> RE: WORKPLAN APPROVAL LETTER SITE CODE: 0710 <br /> ARCO STATION 5469, 130 S.WILSON WAY, STOCKTON <br /> WORKPLAN: Preliminary Site Characterization Workplan DATED: 2/28/2000 <br /> PREPARED BY: The IT Group <br /> APPROVED X <br /> NEEDS ADDENDUM X <br /> DIRECTIVE <br /> DISAPPROVED <br /> Submit by:' April 25,2000 <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN'(H&S 25299.37,subd.(c)(3).): <br /> Sample soil and groundwater, install monitor wells, sample groundwater,' analyze and report results <br /> quarterly until further written notice from PHS/EHD. Workplan is approved with the following conditions. <br /> COMMENTS AND CONDITIONS: <br /> In.addition to those compounds listed in the workplan, all soil and groundwater. samples shall be <br /> analyzed for Methanol; Ethanol, EDB and 1,2-DCA using EPA Method 8260 (GC/MS) until further <br /> written notice. PHS/EHD recommends that at least 50% of all boreholes be continuously cored with <br /> detailed attention'to the construction of'well screen intervals. Please add one well due east of the <br /> existing UST pit, hear the station building, add one well'riear the north-west corner of the property and <br /> one well north-east of proposed monitor well one (MW-1). .Monitor.welis installed shall be screened in <br /> preferential flow-paths. Report all results to PHS/EHD in a timely manner. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN (H&S 25299.37,subd.(Q(3).): <br /> None. <br /> DATED 4/4/2000 BY____ <br /> Ro ald W. Rowe, <br /> Senior Registered Ehvironl ental Health Specialist <br /> Cc: RWQCB---R5, Marty Hartzell <br /> Stratus—Jay Johnson <br /> A Division of San Joaquin County 1-Jealth Care.Services <br />