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r � � <br /> k" KLEIN FE LDER <br /> FEP' 411 26 <br /> January 12, 1994 <br /> File: 24-220152-F00 <br /> Mr. Steve Keeter <br /> San Joaquin County <br /> Department of Capital Projects <br /> 222 East Weber Avenue <br /> Courthouse, Room 678 <br /> Stockton, California 95202 <br /> Subject: Soil Excavation and Assessment Results <br /> Former Aboveground Fuel Oil Tanks <br /> San Joaquin County General Hospital <br /> French Camp, California <br /> Dear Mr. Keeter: <br /> Attached are the results of laboratory analysis for soil samples collected from the fuel oil tank <br /> soil removal performed on December 30, 1993 at San Joaquin County General Hospital in <br /> French Camp, California (Plate 1). Kleinfelder was retained to observe excavation activities, <br /> to collect soil samples to verify removal of soil and assess excavated soil for remediation <br /> options. The area of concern, as documented in Kleinfelder's October 27, 1993 letter, was the <br /> northwest corner of the former fuel oil storage area. Boring B-4, was drilled to a total depth <br /> of 31.5 feet below ground surface (BGS). Fuel oil was detected at 11,000 mg/kg. at 6 feet <br /> BGS but nondetectable at 11 feet BGS. <br /> Field Activities <br /> A Kleinfelder geologist was on-site on December 30, 1993 to observe subsurface excavation. <br /> Excavation services were performed by Ruff Stuff excavators under subcontract to O'Brien- <br /> Krietzer. Approximately 25 yards of discolored soil were removed. The affected soil centered <br /> around the area of boring B-4 drilled by Kleinfelder and extended approximately 2 feet around <br /> the boring Iocation. Discolored soil was removed to a depth of approximately 11 feet. <br /> Excavated soil was transported to an on-site soil stockpile area designated by Mr. John Tuttle <br /> of O'Brien-Krietzer. Ms. Linda Turkatte of San Joaquin Public Health Services was present at <br /> the end of excavation activities and during soil sampling activities. <br /> Upon completion of excavation, Kleinfelder collected four sidewall verification samples and <br /> one excavation bottom verification sample. The sample locations and numbers are shown on <br /> Plate 2. Samples were recovered by scraping the desired location with the backhoe bucket and <br /> qlq_10 3 <br /> 24-220152-FOO/CR32-1 (1994) Page i of 3 January 13, 1994 <br /> Copyright 1994 Kleinfelder, Inc. <br /> KI_EI\FELDFR 1077 Fite Circle, Sacramento, CA 95827 M16) 366-1,701 <br />