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ENVIRONMENTAL HEALTH DEPARTMENT <br /> pouiN <br /> c SAN JOAQUIN COUNTY <br /> _ Unit Supervisors <br /> Donna K Heran,R E H S <br /> ` <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman R E H S <br /> Huggins,R E H 5, R D I <br /> Mike Al Olsen,R E H S Stockton, California 95202-2708 MikeDouglas W Wilson,R E N S <br /> QgCi FORN�P Program Manager Telephone (209)468-3420 Margaret Lagorio,R E H S <br /> Laurie A CotR E H S <br /> Man Fax (209) 464-0138 Robert McClellon,R E H S <br /> Program Manager <br /> ��iH M n Itk Nb.f,R E H S <br /> PAUL SUPPLE KITTY WALKER <br /> ATLANTIC RICHFIELD COMPANY COS REDEVELOPMENT AGENCY <br /> PO BOX 6549 305 N EL DORADO STREET <br /> MORAGA CA 94570 STOCKTON CA 95202 <br /> RE Former ARCO Station#4493 Site Code # 1042 <br /> 205 N Center Street <br /> Stockton CA 95202 <br /> WORK PLAN Work Plan Addendum for Dual Completion Monitoring Wells <br /> DATED May 15,2003 <br /> PREPARED BY URS Group,Inc <br /> APPROVED rx <br /> DISAPPROVED [[ <br /> ADEQUATE AND NECESSARY ELEINIENT,U OF THE WORK PLAN [H&S 25299 37,subd(c)(3)] <br /> I Installation of one deep monitoring well for vertical assessment of the plume near onsete wells Mev'-4 and i`IXTI-8 <br /> The boring for this well will be continuous[) cored from 56 feet bsg to total depth for hthologic interpretation and <br /> proper screen placement <br /> 2 Installation of one nested monitoring well for lateral and vertical assessment of the plume downgradient from the <br /> site <br /> COi1Liy1ENTS AND CONDITIONS <br /> 1 rl revised"Table 2" from the 2/4/03 URS Well Installation Report was included in the work plan However,the <br /> Quarterly Groundwater Monitoring Report,First Quarter 2003 dated May 2003, that was submitted to SJC/EHD <br /> on the same day as the subject work plan contains the ongmal,incorrect"Table 2" Please revise the table in this and <br /> all future reports of the site <br /> 2 Subrrut a San Joaquin County Well Peanut appbcation,along with the required$89 00 permit fee,for the deep onsite <br /> momtonng well <br /> 3 San)oaquia Count) well permit#31631 is still in effect for instaLatton of the offsite nested well <br /> 4 Ensure all necessary City of Stockton encroachment and revocable permits are m place for installation of the offsite <br /> nested well <br /> 5 Ensure San Joaquin County Well Standards are adhered to dinning construction of the nested well A2-inch <br /> separation must be maintained between the well casings Development of newly installed well must occur no less <br /> than twelve hours after setting the grout <br /> 6 Forty-eight hours notice to SJC/EHD is required prior to all fieldwork <br /> Lori Duncan,Senior REHS Nuel C Henderson,Jr,R G <br /> LOP/Site Mitigation Unit IV LOP/Site NI Ltigation Unit Ar <br /> cc vltlll�rnon Elarth,URS <br /> Bill Brown,Daley&Heft <br /> James Barton,CVRWQCB <br />