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San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> G� 600 East Main Street gonna Heran,RENS <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Robert McClellon,RENS <br /> . Jeff Carruesco, RENS, RDI <br /> f. Website: www.sjgov.org/ehd Kasey Foley, RENS <br /> F 60 Phone: (209) 468-3420 Linda Turkatte, REHS <br /> Fax: (209) 464-0138 <br /> SPRECKLES SUGAR COMPANY <br /> PO BOX 68 <br /> MENDOTA, CA 93640 <br /> RE: Former Holly Sugar Site Code: 2124 <br /> 20500 Holly Drive <br /> Tracy, Ca. 95378 <br /> WORK PLAN: UST Remediation Proposal, Excavation Only <br /> DATED: October 21, 2010 <br /> PREPARED BY: John Minney <br /> APPROVED: [X] <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25296.10 (c)(3)]: <br /> 1. To excavate contaminated soil from former UST- B location and former UST- Bunker <br /> location to reduce contaminant mass affecting ground water and reduce the potential for <br /> shallow soil vapor contamination from intruding into on-site structures. The proposed <br /> maximum excavation depths will be 10 feet below surface grade (bsg). <br /> 2. To perform appropriate soil analysis, utilizing approved EPA Methods, on soil <br /> confirmation samples collected from within the final excavations. <br /> 3. The excavated soil will be segregated, based on analysis, and bioremediation cells (bio- <br /> cells) will be constructed on-site to treat the contaminated soil to acceptable <br /> contaminant concentrations. <br /> 4. After completion of the point source removals, the excavations will be backfill and <br /> compacted with approved clean materials. <br /> 5. Soil samples will be collected from the bio-cells to evaluate the remedial process <br /> performed. <br /> 6. Ground water samples will be collected from a monitoring well post-remediation to <br /> evaluate mass flux contaminant reduction and establish concentration trends. <br /> 7. To permanently close and remove the recently discovered UST- Hydraulic Oil that is <br /> located approximately 25 feet west of former UST-B. Soil samples will be collected and <br /> analysis from beneath the UST-Hydraulic invert to determine if an unauthorized release <br /> has occurred from the existing UST-Hydraulic Oil. <br />