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KLEINFELDER <br /> August 15 1989 SCE}QED <br /> File: 24-220012 <br /> AUG 1 81989 <br /> Mr. Allerton Blake -ENVIRONMENTAL HEALTH <br /> pRojFCT,AAIIs'3an,A PERMIT/SERVICES <br /> American Savings Bank Amencan sav+n9 <br /> P.O. Box 1047 <br /> Stockton, CA 95290-0076 <br /> SUBJECT: Sampling Results <br /> 1888 Lockheed Court <br /> Stockton, California <br /> Dear Mr. Blake: <br /> ; t <br /> Enclosed are the analytical results for the soil samples collected from the tank excavations <br /> located at 1888 Lockheed Court, Stockton, California. Two 12,000 gallon underground <br /> storage tanks (UGST) were excavated and removed from the south side of the American <br /> Savings Bank building, and a 10,000 gallon (UGST) was excavated and removed from the <br /> parking lot on the west side of the building. The three tanks reportedly held unleaded <br /> gasoline. However, one of the 12,000 gallon tanks (the west tank on the south side of the <br /> building) may have held aviation fuel at one time. Samples collected from the bottom the <br /> tank excavations were submitted for chemical analysis. Total petroleum hydrocarbons and <br /> benzene, toluene, ethylbenzene, and xylene were not indicated 'in the analysis of eight <br /> samples. <br /> Sampling Activities <br /> On July 19, 1989, a Kleinfelder geologist collected soil samples from the bottom of each of <br /> the three tank excavations. A representative from the San Joaquin Local Health District <br /> (SJLHD), Mr. Charles Hunt, was present throughout the sampling process. Mr. Hunt <br /> specified the sample locations and analyses according to SJLHD guidelines. Three samples <br /> were collected beneath each of the 12,000 gallon tanks, and two samples were collected <br /> beneath the 10,000 gallon tank. The bottom of the excavations was approximately 14 feet <br /> below the ground surface, and soil samples were collected at an approximate depth of.16 <br /> feet. The soil samples consisted of moist, brown sand and sandy clay. The sand <br /> encountered was fine grained and partially cemented. <br /> Soil samples were obtained by driving clean brass tubes into the soil collected in the <br /> backhoe bucket. Sample tubes were decontaminated prior to sampling by washing in a <br /> solution of trisodium phosphate (TSP), followed by a distilled water rinse. Each tube was <br /> retracted, capped with Teflon sheeting and tightly fitting plastic end caps. Samples were <br /> labeled, logged on a chain-of-custody and stored on ice until delivery to California <br /> Analytical Laboratories/Enseco in West Sacramento, California. <br /> KLEINFELDER 9795 Business Park Drive, Sacram.nto, CA 95827 (916) 366-1701 <br />