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sue <br /> San Joaquin County <br /> DrRFcroR <br /> Environmental Health Department Donna Heran, REHS <br /> 600 East Main Street PROGRAM COORDINATORS <br /> 2. °�r'�v •Z <br /> California 95202-3029 Robert McGlellon, REHS <br /> (n {; Stockton, <br /> Jeff Carruesco, REHS,RDI <br /> "' . <br /> Kasey Foley,REHS <br /> ; WWw.sjgov.org/ehd Website: www.sjg Linda Turkatte,REHS <br /> L <br /> ov.or /ehd r F o Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> February 6, 2012 <br /> Mr. Thomas Sexton Shadrall Hammer Lane L.P. <br /> Mr. Eric Schneider <br /> Ultramar Inc. c/o Auburndale Properties, Inc. <br /> 685 West Third Street 5670 Wilshire Boulevard, Suite 1470 <br /> Hanford, CA 93230 Los Angeles, CA 90036 <br /> Subject: Beacon #3641 1 Shadrall Property#1415 LOP Case#: 1125 <br /> 1210 East Hammer Lane APN: 094-030-12 <br /> Stockton, CA 95210 Geotracker ID#: T0607700492 <br /> The San Joaquin County Environmental Health Department (EHD) has received an electronic <br /> mail request to modify the San Joaquin County Well Standard procedures for destroying <br /> monitoring, soil vapor, and air injection wells installed at this site to conduct a required <br /> investigation and clean up of the soil and groundwater impacted by an unauthorized release from <br /> the underground storage tanks (UST) previously located at the above referenced subject site. <br /> The EHD requires the contents of the wells to be removed if contamination is present. The <br /> electronic mail request, dated January 16, 2012, stated-that-due-to close. proximity to existing <br /> I USTs, only pressure grouting procedures�uad t euseo. The EHD has evaluated-the bore logs <br /> 1 and construction specifications for wo—Is-, MW-1/VW-112, VW-3/4, VW-5/6, VW-7/8,,,MW-5, and <br /> SW-1 and has determined that pressure,g routing at this time is the only viable metd for these <br /> wells. Your request to pressure grout these "nested' and -single compietio n e Is is approve <br /> with the following conditions. ' <br /> The EHD has determined that pressure grouting contaminated wells within a conductor casing is <br /> not an adequate way to eliminate migration of contaminants. Although necessary at this time <br /> since these wells are located between active USTs, the EHD requires that these wells and <br /> conductor casings be drilled out when these USTs are removed in the future. The upper <br /> conductor casing is to be removed and the internal PVC well casings are to be drilled out to total <br /> depth of installation and backfilled with neat cement grout. Current land owners, UST operators, <br /> and UST owners will be responsible to ensure that this requirement is met by advising any new <br /> landowner(s) should the site be sold with these USTs still in place. <br /> Reviewing the well logs you submitted to support a waiver to our Well Standards, the EHD noted <br /> that the well construction logs did not accurately represent the well construction details and the <br /> well designations written on the photo map submitted do not match the Horizon site maps. <br />