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San Joaquin.-County <br /> EnvironmentalHealthDepartment DIRECTOR <br /> �.. _,��: •.p Donna Heran,REHS <br /> 1868 East Hazelton Avenue <br /> a: i ;i, _ •-� <br /> Stockton, California 95205-6232PROGRAM COORDINATORS <br /> . Robert McClellon,REHS <br /> •• Jeff Carruesco, REHS,RDI <br /> Kasey Foley,REHS <br /> Cq .. �P Website: www.s gov.Org/ehd Linda Turkatte,REHS <br /> /FR <br /> O <br /> Phone: (209)468-3420 <br /> Fax: (209) 464=0138 <br /> January 28,2013 <br /> City of Tracy <br /> c/o Paul Verma Tracy Disposal <br /> 325 Civic Center Plaza c/o D & NC Trust, etal <br /> Tracy, CA 95376 PO Box 274 <br /> Tracy, CA 95378 <br /> Subject: City of Tracy/Delta Disposal Site Code: 2183 <br /> 99 W Sixth Street <br /> Tracy, CA 95376 <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 September 18, 2012 for the above.subject site. It is now necessary <br /> to plan the destruction of all wells installed as part of your site investigation and remedial action, <br /> as the EHD will not issue a Case Closure Letter for this site until the wells have been properly <br /> destroyed and all onsite waste material have been removed and properly disposed of. The <br /> wells are to be destroyed within 90 days of the date of this letter. <br /> Please submit a work plan that details the conditions and construction of the wells and the <br /> methods and materials to be used to destroy them. To be issued a well destruction permit the <br /> proposal must comply with the San Joaquin County Well Standards requirements, including: <br /> • Wells that have laboratory data from the last groundwater sampling event that <br /> demonstrate the presence of any contaminants of concern are to be destroyed by <br /> removing all the contents bf the original borehole (conductor casing, well casing, screen, <br /> filter pack, grout sealant); the cleared borehole is then to be sealed with neat cement by <br /> grouting from the bottom up to a depth of three feet below grade. <br /> • All wells with unknown construction and/or located in an area of known contamination <br /> are to be destroyed by removing all the contents of the original borehole as described <br /> above; the cleared borehole is then to be sealed with neat cement by grouting from the <br /> bottom up to a depth of three feet below grade. <br /> • Wells that have laboratory data from the last sampling event that report non-detectable <br /> concentrations of contaminants of concern, with acceptable laboratory detection limits, <br /> may be destroyed by pressure grouting with neat cement from the bottom up while <br />