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PUBLIC HEALTH SERVICES ,oPQ ,�o <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> s <br /> Karen Furst, M.D., M.P.H., Health Officer c P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 --- <br /> r' <br /> RONALD NUNAN / JON JERNIGAN 'O 0 <br /> 651 GATEWAY BLVD. �p <br /> SUITE 790 <br /> �- S. SAN FRANCISCO CA 94080 <br /> R qo3 <br /> RE: TOWN AND COUNTRY CHE VRON Site Code: 1621 <br /> 13336_FJJW.l88 _^ <br /> LOCKFORD CA 95237 <br /> WORKPLAN:Work Plan for Nunan DATED:October 02.2000 <br /> PREPARED BY:GeoSoly,LLC <br /> APPROVED with Conditions (see below) <br /> DISAPPROVED 0 <br /> ADDENDUM 0 Submit by: <br /> As discussed in a telephone conversation with your consultant GeoSoly on November 1,2000,this work plan <br /> is approved with the following conditions: <br /> COMMENTS AND CONDITIONS: <br /> 1. San Joaquin County Public Health Services Environmental Health Divisions (PHS/EHD) requests <br /> you do not wait for analyses of samples before converting temporary wells to permanent monitoring <br /> wells. Installation of temporary monitoring wells is not permitted in San Joaquin County. <br /> PHS/EHD directs the 3 monitoring wells be installed instead. <br /> 2. Reduce the length of the screen of the proposed monitoring wells from 30 feet to 10 feet. <br /> 3. Modify the location of the proposed wells closer. At least one monitoring wells should be installed at <br /> the source of the plume. PHS/EHD recommends location of the wells begins on site before moving <br /> out(stepping out) to investigate the Iateral extent if required. <br /> 4. Analyze all selected soil and groundwater samples (including the supply well) for gasoline,BTEX, all <br /> oxygenates (MTBE,TBA,DIPE,TAME,ETBE),methanol,ethanol, 1-2 DCA(1,2 dicholoroethane), <br /> and EDB (1-2 dibromoethane). Oxygenates must be analyzed using EPA Method 8260. Note some <br /> laboratories will provide the whole suite of analytes including BTEX,oxygenates,EDB,and 1,2 DCA <br /> using Method 8260b for a more cost effective approach. <br /> 5. Obtain well permit and encroachment permits (if required) and submit the appropriate fee before <br /> work commencement. Permit must be signed by and is issued solely to the G57 licensed contractor. <br /> 6. Work must commence no later than December 1,2000. <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN(H&S 25299.37,subd.(c)(3).): <br /> 1. Installation of 3 monitoring Well on site to investigate and define the extent of the contamination. <br /> Soil and ground water samples will be collected for lab analyses. <br /> 25299.37,subd.(C)(3).): <br /> 1. N/A 0OR &NS FREASODISAPPROVAL OF THE WORKPLAN(HS f\ <br /> DATED A/D Z BY xh/� <br /> cc: CRWQCB,Central Valley Region-Marty Hartzell <br /> C'c GeoSov,LLC,643 Oregon Street,Sonoma,CA 95476-Franklin J.Goldman <br /> A Division of San Joaquin County Health Care Services <br />