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m60 <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />www.sequoialabs.com <br />Kleinfelder - Stockton Project: Granite Bumpile <br />2825 East Myrtle Street Project Number: 20-1108-33 Reported: <br />Stockton CA, 95205 Project Manager: Doug Heard 08/15/01 17:24 <br />Diesel Hydrocarbons by DHS LUFT - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />\nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 1080087 - EPA 3550B <br />Blank (1080087-BLK1) _— Prepared: 08/08/01 Analyzed: 08/09/01 <br />Extractable Hydrocarbons (C 10-24) ND 1.0 mg/kg <br />Surrogate: Pentacosane 0.646 0.667 96.9 50-150 <br />L_C_S (1080087 -BSI) _ Prepared: 08/08/01 Analyzed: 08/09/01 <br />Extractable Hydrocarbons (C 10-24) 13.5 1.0 mg/kg 16.7 80.8 60-140 <br />Surrogate: Pentacosane <br />0.657 <br />0.667 98.5 50-150 <br />LC_S Dup (1080087-BSD1) <br />Prepared: 08/08/01 Analyzed: 08/09/01 <br />Extractable Hydrocarbons (C 10-24) <br />15.2 1.0 mg/kg <br />16.7 91.0 60-140 11.8 40 <br />Surrogate: Pentacosane <br />0.765 <br />0.667 115 50-150 <br />Matrix Spike (1080087 -MSI) <br />Source: 5107406-03 <br />Prepared: 08/08/01 Analyzed: 08/09/01.----------- <br />8/09/01_______Extractable <br />ExtractableHydrocarbons (C 10-24) <br />11.8 1.0 mg/kg <br />16.7 ND 70.7 50-150 <br />Surrogate: Pentacosane 0.656 0.667 98.4 50-150 <br />Matrix Spike Dup (1080087-MSD1) Source: S107406-03 Prepared: 08/08/01 Analyzed: 08/09/01_ <br />Extractable Hydrocarbons (CIO -24) 11.7 1.0 mg/kg 16.7 ND 70.1 50-150 0.851 50 <br />Surrogate: Pentacosane 0.697 0.667 104 50-150 <br />Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document. This analytical report must he reproduced in its entirety. <br />Page 11 of 20 <br />