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Sequoia <br />� Analytical <br />819 Striker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916)921-9600 <br />FAX (916) 921-0100 <br />www sequoialabs com <br />0 <br />SECOR International - Rancho Cordova Project Chevron 9-5775, Lodi, CA Sampled 6/30100 <br />3017 Kilgore Road, Suite 100 Project Number 077 41991 043 Received 713100 <br />Rancho Cordova, CA 95670 Project Manager David Evans Reported 7/13/00 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT/Quality Control <br />Sequoia Analytical - Sacramento <br />Batch 0070098 <br />Blank <br />Purgeable Hydrocarbons <br />Benzene <br />Toluene <br />Ethylbenzene <br />Xylenes (total) <br />Methyl tent -butyl ether <br />Surrogate a,a,a-Trifluorotoluene <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />Analvzed Level Result Resutt Units Recov Limits % Limit % Notes* <br />Date Prepared 7111100 <br />0070098-BLK1 <br />7/11/00 <br />0200 <br />Extraction Method EPA 5030B McOH <br />ND mg/kg <br />100 <br />ND <br />000500 <br />ND <br />000500 <br />ND <br />000500 <br />ND <br />000500 <br />PID <br />00500 <br />0 183 11600-140 <br />915 <br />LCS <br />0070098 -BSI <br />Benzene <br />7111100 <br />0200 <br />0 174 <br />mg/kg <br />700-130 <br />870 <br />Toluene <br />0200 <br />0 193 <br />700-130 <br />965 <br />Ethylbenzene <br />0200 <br />0 192 <br />700-130 <br />960 <br />Xylenes (total) <br />0 600 <br />0 533 <br />700-130 <br />888 <br />Methyl tert-butyl ether <br />0200 <br />0 158 <br />700-130 <br />790 <br />Surrogate a,a,a-Trifluorotoluene <br />0200 <br />0191 <br />600-140 <br />955 <br />Matrix Spike_ <br />0070098 -MSI <br />S007070-24 <br />Benzene <br />7/11/00 <br />0200 <br />ND <br />0 177 <br />mg/kg <br />600-140 <br />885 <br />Toluene <br />it0200 <br />ND <br />0202 <br />600-140 <br />101 <br />Ethylbenzene <br />0200 <br />ND <br />0202 <br />to600-140 <br />101 <br />Xylenes (total) <br />to0 <br />600 <br />ND <br />0 571 <br />600-140 <br />952 <br />Methyl tert-butyl ether <br />0200 <br />ND <br />0 160 <br />600-140 <br />800 <br />Surrogate a,a,a-Trifluorotoluene <br />0200 <br />0172 <br />600-140 <br />860 <br />Matrix Spike Dup <br />0070098-MSDI <br />5007070-24 <br />Benzene <br />7111/00 <br />0200 <br />ND <br />0 180 <br />mg/kg <br />600-140 <br />900 <br />250 <br />168 <br />Toluene <br />0200 <br />ND <br />0 189 <br />600-140 <br />945 <br />250 <br />665 <br />Ethylbenzene <br />0200 <br />ND <br />0208 <br />600-140 <br />104 <br />25 0 <br />293 <br />Xylenes (total) <br />to0 <br />600 <br />ND <br />0 583 <br />600-140 <br />972 <br />25 0 <br />208 <br />Methyl tert-butyl ether <br />0200 <br />ND <br />0 164 <br />600-140 <br />82 0 <br />25 0 <br />247 <br />Surrogate a a a -Trac luorotoluene, <br />0200 <br />0178 <br />600-140 <br />890 <br />Sequoia Analytical - Sacramento <br />*Refer to end of report for text of notes <br />Page 3 of 4 <br />