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k" KLEI N FELDER Y <br /> I P ! 2: I/2 1r <br /> lei rlls i ! 1 <br /> April 4, 1994 <br /> File: 24-220152-G00 { 1 <br /> Mr. Steve Keeter <br /> San Joaquin County <br /> Department of Capital Projects <br /> Courthouse, Room 678 <br /> 222 East Weber Avenue <br /> Stockton, California 95202 <br /> Subject: Sampling and Subsequent Chemical Analysis <br /> South Side Existing Central Plant <br /> San Joaquin County General Hospital <br /> French Camp, California <br /> Dear Mr. Keeler: <br /> Attached are the results of laboratory analysis for soil samples collected from an excavation <br /> bottom and tunnel tailings on March 24, 1994 at San Joaquin County General Hospital in <br /> French Camp, California. Kleinfelder was retained to collect and analyze soil samples on a <br /> rush turn-around basis. The area of concern, was an excavation 22 1/2 feet south and <br /> 11 1/2 feet west of the northwest corner of the existing Family Practice Building (south of the <br /> existing Central Plant) and tunnel tailings generated from beneath the north end of the existing <br /> Family Practice Building. <br /> Field Activities <br /> On March 24, 1994, a Kleinfelder geologist was on-site due to oily soil encountered during <br /> excavation for shoring south of the existing Central Plant. Soil sample #1 - 70729 was <br /> collected at a depth of 7.5 feet below grade, above a wood bottom. Additionally, soil sample <br /> #2 - 70730 was later collected from tunnel tailings obtained from beneath the north end of the <br /> Family Practice Building. Mr. Russ Konig of O'Brien-Kreitzberg & Associates, Inc. was <br /> present during the sampling. The samples were placed in an ice cooler and transported <br /> immediately to Roy F. Weston, Inc., Stockton Laboratory for analysis. <br /> Analytical Results <br /> Both soil samples were analyzed for the presence and concentration of semi-volatile organics <br /> by EPA Method 8240, Total Petroleum Hydrocarbons as referenced to gasoline by EPA <br /> Method 8015M/LUFT, and Total Petroleum Hydrocarbons as referenced to diesel by EPA <br /> Method 8015M/LUFT. <br /> The sample obtained from the excavation bottom (Sample #1 - 70729) contained concentrations <br /> of 11,000 mg/kg TPH-Diesel, 430 mg/kg TPH-Gasoline, and trace levels of some semi- <br /> volatile compounds. The sample obtained from the tunnel tailings (Sample #2 - 70730) <br /> 24-220152-GOO/CR38-11 (1994) Page 1 of 2 April 4, 1994 <br /> Copyright 1994 Kteinfetder, inc. <br /> KI FI\FEI DER .3077 Pito Cir(ic, S,icramentu, CA ')_)827 (`1ib) 160-1701 <br />