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E <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> �,. ��.;••,p Donna Heran,RENS <br /> 1868 East Hazelton Avenue <br /> Stockton, California 95205-6232 PROGRAM COORDINATORS <br /> v Robert McClelbn,REHS <br /> Jeff Carruesco,REHS,Rol <br /> • �' • :°R Website:www.S/gov.org/ehd Kasey Foley,RENS <br /> 4 F b Linda Turkatte,REHS <br /> Phone: (209)468-3420 <br /> Fax: (209)464-0138 <br /> December 26, 2012 <br /> Mr. Jerry Moore <br /> Moore Petroleum <br /> 885 Portofino Drive <br /> Brentwood, California 94513-6539 <br /> Subject: Former Moore Petroleum Bulk Plant <br /> 5491 F Street <br /> Banta, California 9530 <br /> Dear Mr. Moore: <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 12 December 2012, for the above-referenced site; and the EHD has <br /> reviewed Well Destruction Work Plan (work plan) dated 16 July 2012, submitted by your <br /> consulting firm, Apex Envirotech, Inc. (Apex) on your behalf. <br /> In the work plan, Apex proposes to destroy eleven monitoring wells (MW-1, MW-2, MW-4A, <br /> MW-5, MW-6, MW-9, MW-12 through MW-14, MW-16 and MW-17), and ten ozone sparging <br /> wells (OS-1 through OS-10) by pressure grouting. Apex proposes to use a tremie pipe to grout <br /> to the surface with portland cement slurry followed by applying 25 pounds per square inch (psi) <br /> of pressure for a minimum of five minutes, and then Apex over-drilling the top five feet and <br /> backfilling the hole with portland cement slurry to within a foot of the ground surface. <br /> Apex also proposes to destroy five monitoring wells (MW-3, MWA 0, MWA 1, MW-15 and MW- <br /> 18), two monitoring/vapor extraction wells (MW-7NEW-4 and MW-8NEW-3), two vapor <br /> extraction wells (VEW-1 and VEW-2), and one recovery well (RW-2) by over-drilling the wells to <br /> total depth using augers with diameters equal to or greater than the augers used to install the <br /> wells; then, Apex proposes to grout the borehole with portland cement slurry using a tremie <br /> pipe. <br /> The EHD has reviewed the historical soil and groundwater analytical data for this site. Based <br /> on the presence of petroleum hydrocarbon contamination in soil samples collected at the time of <br /> well installation, or the location of the well near known or suspected contamination, or the <br /> detection of contaminants of concern in relatively recent groundwater samples collected at the <br /> site, the EHD approves the following: <br />