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San Joaquin County <br /> .� Environmental Health Department DIRECTOR <br /> Donna Heran, REHS <br /> 1868 East Hazelton Avenue <br /> X Stockton, California 95205-6232 PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> Jeff Carruesco, REHS,RDI <br /> C4' •-...••�i�P Website: www.sjgov.org/ehd Kasey Foley, REHS <br /> �rFOR 209 468-3420 <br /> Linda Turkatte,REHS <br /> Phone: <br /> ( ) Rodney Estrada,REHS <br /> Fax: (209) 464-0138 Adrienne Ellsaesser, REHS <br /> October 29, 2013 <br /> Brian A. Waite Christine Coroneo <br /> Chevron Env. Mgmt. Company Sutter Office Center <br /> 6101 Bollinger Canyon Road, BRIX-5321 2001 Union Street#300 <br /> San Ramon, CA 94583 San Francisco, CA 94123 <br /> Subject: Former Chevron Station 9-8227 <br /> Sutter Office Center <br /> 242 Sutter Street <br /> Stockton, CA 95202 <br /> The San Joaquin County Environmental Health Department (EHD) has received a No Further <br /> Action Required Concurrence letter from the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB), dated 28 October 2013, for the above-referenced site. It is now necessary <br /> to plan and execute the destruction of all wells installed as part of your site investigation and <br /> corrective action, as the EHD can not issue a Case Closure Letter for this site until the wells <br /> have been properly destroyed and all onsite waste material has been removed and properly <br /> disposed. The wells are to be destroyed within 60 days of the date of this letter, or current <br /> analytical data for groundwater collected quarterly from the wells shall be submitted for review <br /> until the wells have been properly destroyed. If the wells are not destroyed or monitored as <br /> specified, the EHD will begin enforcement activity for having inactive and abandoned wells at <br /> the site. <br /> Please submit a scope of work proposal that details the conditions and construction of the wells <br /> and the methods and materials to be used to destroy them. To be issued a well destruction <br /> permit, the proposal must address the concerns of the EHD and the San Joaquin County Well <br /> Standards requirements, such as: <br /> • Wells that have laboratory data from the last sampling event that demonstrate the <br /> presence of any contaminants of concern in groundwater are to be destroyed by <br /> removing all the contents of the well (conductor casing, well casing, screen, filter pack, <br /> grout sealant); the cleared borehole is then to be sealed with neat cement by pressure <br /> grouting from the bottom upward to a depth of three to five feet below grade. <br /> • All wells with unknown construction and/or located in an area of known or suspected <br /> area of contamination are to be destroyed by removing all the contents of the well <br /> (conductor casing, well casing, screen, filter pack, grout sealant); the cleared borehole is <br /> then to be sealed with neat cement by pressure grouting from the bottom upward to a <br /> depth of three to five feet below grade. <br /> • Wells that have laboratory data from the last sampling event that yielded non-detectable <br /> rrnnr-Pntratinnc of rnntaminantc of rnnnarn anr•d with arr.P.ntah1P lahnratnry rdPtPrtinn <br />