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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Lr <br /> rt1r supervisors <br /> R K R <br /> Donna eran, E H 5 <br /> r ` W 304 I East Weber Avenue, Third Floor Carl�nrgman,R E 11 S Iltrector Mti4 e Ruggms,R E H 5,R D I <br /> • , At 01wit,R E H S Stockton, California 95202-2708 Dmigtas tier Wilson,R F x s <br /> ��iFORa� Program Manager Telephone (209)468-3420 Margaret Lagorio,R E H S <br /> Laws ie A Cotulia,RE H S <br /> PTogiane JVlanager Fax (209) 464-0138 Robert McCletlon,It E H S <br /> Marl Barcellos,R E H S <br /> SHELBY LATHROP <br /> CONOCOPHILLIPS <br /> 76 BROADWAY <br /> SACRAMENTO CA 958 .8 <br /> RE Tosco (farmer Unocal) Service Station #4409 Site Code 508431 <br /> 1502 N El Dorado St RO# 0000664 <br /> Stockton, CA , 95204 <br /> WORK PLAN "Work Plan for Well Installation" <br /> DATED August 12, 2004 <br /> ' PREPARED BY Secor International Inc — Rusty Benkosky, P.E <br /> STATUS APPROVED <br /> 10 ADEQUATE AND NECESSARY_ELEMENTS OF THE WORK PLAN LH&S <br /> 25296 10, subd(c){3)1 - - - - - <br /> Install three, 4-inch, onsite, deep-screened (110' to 120' bgs) <br /> monitoring wells (MW-#1 5, -#16, 417) to 120' bgs for continued <br /> vertical investigation in areas recently identified in a CPT <br /> investigation and, <br /> • Collect soil samples starting at 80' bgs and continuing to 120' bgs <br /> at 10-foot intervals from MW-17 only and analyze soil and grab <br /> ground water samples for TPHg, BTEX, five fuel oxygenates, EDB, <br /> ethanol, 1,2-DCA, and EDB by EPA Method 8260 and, <br /> 1 a Submit a report of findings to SJCEHD in the format of an <br /> 1 updated Site Conceptual Model (SCM) <br /> COMMENTS AND CONDITIONS <br /> • The work pian is approved as written Submit a SJCEHD Well <br /> ' Permit Application form and $89 fee now <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN iH&S 25296 10, <br /> subd(cy3)1 <br /> None <br /> DATED August 23, 2004 BY z� <br /> Michael lnfurna, RE (209)468- <br /> [XI <br /> 209)468-(XJ Faxed to consultant 8-23-04 <br /> �e/Ed �Jad <br /> SdT�i�THdC�OIIrJ� 6�`9L-SS's-9�5 6�r b9 b49�f58160 <br />