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' I <br /> J • H . KLEINFELDER & ASSOCIATES <br /> GEOTECHNICAL CONSULTANTS . MATERIALS TESTING <br /> ENVIRONMENTAL RESOURCES <br /> 9795 BUSINISS PARK DRIVI.SUITI.D <br /> SACRAMI WO.CA 95827-1794 <br /> 14161 166-17111 <br /> March 12, 1987 <br /> File: 24-Y72037 <br /> Mr. Brad Oben <br /> Pacific Coast Producers <br /> P.O. Box 880 <br /> Lodi, CA 95240 <br /> SUBJECT: COLLECTION OF SOIL SAMPLES FOR UNDERGROUND STORAGE TANK <br /> CLOSURE IN PLACE. <br /> Dear Mr. Ober: <br /> The following describes our work plan to collect soil samples adjacent to <br /> three underground storage tanks located at Pacific Coast Producers, 32 B. <br /> Tokay St. in Lodi, California. <br /> BACKGROUND <br /> It is our understanding that three 20,000 gallon capacity underground <br /> storage tanks will be closed in place. The tanks were installed in 1978 . <br /> and were used to store diesel fuel. The tanks are approximately 10 feet <br /> in diameter by 35 feet in length. Surface grade to the top of the tanks <br /> is approximately 4 feet with a 4 inch thick concrete slab covering the <br /> surface. The tanks are positioned side by side with approximately 2 feet <br /> of clearance between each tank. Permanent structures over the tanks (see <br /> Plate 1 ) and walls surrounding the tank site on three sides preclude tank <br /> removal and severely limit possible sample boring locations. <br /> SCOPE QF WQRK - SOIL. BORING <br /> Three borings will be drilled at the approximate locati hown on Plate <br /> 1. Because of the limited clearance available orings a <br /> easible. Therefore, vertical borings are propose <br /> The soil borings will be drilled using a truck mounted drill rig equipped <br /> with 6-inch or 8-inch hollow stem augers. During the drilling, an <br /> experienced Kleinfelder geologist will classify the subsurface soils, <br /> collect soil samples, and log the borehole. Upon completion of the soil <br /> boring and sampling the boring will be backfilled with neat cement. <br /> To reduce the risk of cross-contamination from the equipment all augers <br /> will be steam cleaned prior to the drilling of each borehole. The <br /> sampling equipment will be cleaned with a trisodium phosphate wash and a <br /> distilled water rinse prior to the collection of each soil sample. <br /> 01111R UF11CLS Walnpl Creek . Sunnyvale . San Ramon . Rt-no Sroe►Ian . Ire.no . lakrlu•Id <br /> RrOmerl Park . Merced . Los Anjyles . Las Vegas . 51.Ccorge,Utah <br />