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Analytical <br />Seouoia <br />m <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 Burnpile <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 />Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 1080085 - EPA 5030B (MeOH) <br />Blank (1080085-BLKI) <br />_ _ Source: S107403-21 <br />Prepared & Analyzed: 08/07/01 <br />Purgeable Hydrocarbons <br />ND <br />5.0 mg/kg <br />Benzene <br />ND <br />0.025 " <br />Toluene <br />ND <br />0.025 " <br />Ethylbenzene <br />ND <br />0.025 " <br />Xylenes (total) <br />ND <br />0.025 <br />Surrogate: a,a,a-Tri�luorotoluene 1.16 1.00 116 60-140 <br />LCS (10800_8_5 -BSI) <br />_ _ Source: S107403-21 <br />Prepared & Analyzed: 08/07/01 <br />Prepared & Analyzed: 08/07/01 _ <br />Benzene <br />1.07 <br />0.025 <br />mg/kg 1.00 107 70-130 <br />Toluene <br />1.08 <br />0.025 <br />1.00 108 70-130 <br />Ethylbenzene <br />1.10 <br />0.025 <br />1.00 110 70-130 <br />Xylenes (total) <br />3.15 <br />0.025 <br />3.00 105 70-130 <br />Surrogate: a,a,a-Triiluorotoluene 1.24 1.00 124 60-140 <br />Matrix Spike_(1080085-MS1) <br />_ _ Source: S107403-21 <br />Prepared & Analyzed: 08/07/01 <br />_ <br />Benzene <br />0.880 0.025 mg/kg <br />1.00 <br />ND <br />85.7 <br />60-140 <br />Toluene <br />0.914 0.025 <br />1.00 <br />ND <br />91.4 <br />60-140 <br />Ethylbenzene <br />0.953 0.025 <br />1.00 <br />ND <br />93.5 <br />60-140 <br />Xylenes (total) <br />2.77 0.025 <br />3.00 <br />0.050 <br />90.7 <br />60-140 <br />Surrogate: a,a,a-Tris luorotoluene 1.10 1.00 110 60-140 <br />Spike Dup (1080085-MSD1) <br />Source: 5107403-21 <br />Prepared & Analyzed: 08/07/01 <br />_Matrix <br />Benzene <br />0.866 0.025 mg/kg <br />1.00 ND 84.3 60-140 <br />1.60 <br />25 <br />Toluene <br />0.898 0.025 <br />1.00 ND 89.8 60-140 <br />1.77 <br />25 <br />Ethylbenzene <br />0.951 0.025 <br />1.00 ND 93.3 60-140 <br />0.210 <br />25 <br />Xylenes (total) <br />2.78 0.025 <br />3.00 0.050 91.0 60-140 <br />0.360 <br />25 <br />Surrogate: a,a,a-Tri,/luorotoluene 1.11 1.00 111 60-140 <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 be reproduced in its entirety. <br />Page 10 of 20 <br />