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' KLEINFELDER <br /> TABLE 2 <br /> KLEINFELDER SOIL SAMPLE IDENTIFICATION <br /> ' <br /> Field* <br /> Depth Screening <br /> 1 Boring No Sample I.D. feet Result (pPmv) Disposition <br /> 1 69574 10 115 Retained <br /> 1 69575 15 125 Retained <br /> 1 69576 20 36 Analyzed <br /> 1 69577 25 17 Analyzed <br /> 1 69578 30 15 Retained <br /> 1 69579 35 14 Retained <br /> 1 69580 40 11 Analyzed <br /> 2 67083 25 60 Analyzed <br /> 2 67084 30 15 Analyzed <br /> 2 67085 35 12 Retained <br /> 2 67086 40 0 Analyzed <br /> * The field screening result is an indication of the total organic vapor concentration in <br /> parts per million by volume from the soil sample. The reported concentration is <br /> qualitative due to accuracy Iimitations of the screening device and field variables such <br /> -� as wind, humidity, soil type, and time of sample exposure. Therefore, the screening <br /> result may not be correlated to the quantitative laboratory analytical results. <br /> 1 3.2 GROUND WATER SAMPLING <br /> Per the request of Nor-Cal, a ground water sample was collected from existingmonitoring <br /> g <br /> L well MW-1 on January 27, 1992. The well is centrally located in the backfilled tank <br /> excavation as shown on Plate 4. The well is cased with 2-inch diameter PVC with a total <br /> measured depth of 74.5 feet from ground surface. The static water level was 69.13 feet on <br /> ' January 27, 1992; this is apparently the same depth to water as measured during the Emcon <br /> sampling in June 1991. <br /> No hydrocarbon sheen was observed don the water surface using a clear bailer. The <br /> calculated volume of water in the well casing was 0.9 gallons. Approximately 5 gallons of <br /> water (five well volumes} were purged with a new disposable Teflon bailer prior to sample <br /> collection. While purging, ground water field parameters (pH, electrical conductivity and <br /> FRI-92-15 Page 9 of 21 <br /> Copyright 1992 Kleinfelder, Inc. <br />