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Sequoia <br />Analytical <br />IV <br />SECOR International - Rancho Cordova <br />3017 Kilgore Road, Suite 100 <br />Rancho Cordova, CA 95670 <br />Project Chevron 9-5775 <br />Project Number 077 41991 043 <br />)rniect Manager David Evans <br />819 Striker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916) 921 9600 <br />FAX (916) 921 -0 100 <br />www sequoialabs com <br />Sampled 6/19/00 to 6/20/00 <br />Received 6/21/00 <br />Reported 6126100 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFTIQuality Control <br />Sequoia Analytical - Sacramento <br />Date Spike Sample QC Reporting Limit Recor RPD RPD <br />Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br />Batch 0060232 <br />Date Prepared 6/23/00 <br />Extraction Method EPA 50308 McOH <br />Blank <br />0060232-BLK1 <br />Purgeable Hydrocarbons <br />6123/00 <br />ND <br />mg/kg <br />100 <br />Benzene <br />ND <br />000500 <br />Toluene <br />ND <br />000500 <br />Ethylbenzene <br />ND <br />000500 <br />- <br />Xylenes (total) <br />ND <br />000500 <br />tert-butyl ether <br />ND <br />00500 <br />_Methyl <br />Surrogate a a a-Trrfluorotoluene <br />_" <br />0200 <br />0205 <br />600-140 <br />102 <br />LCS <br />0060232 -BSI <br />Benzene <br />6/23/00 0200 <br />0 176 <br />mg/kg <br />700-130 <br />88 0 <br />Toluene <br />0200 <br />0203 <br />700-130 <br />101 <br />lbenzene <br />0200 <br />0203 <br />700-130 <br />101 <br />nes (total) <br />0 600 <br />0 568 <br />700-130 <br />947 <br />ethyl tert-butyl ether <br />0200 <br />0 161 <br />700-130 <br />805 <br />_ <br />`Surrogate a a a-Trifluorotoluene <br />0200 <br />0203 <br />600-140 <br />101 <br />Matrix Spike <br />0060232 -MSI <br />5006242-01 <br />Benzene <br />6/23/00 0200 <br />ND <br />0 189 <br />mg/kg <br />600-140 <br />94 5 <br />Toluene <br />0200 <br />ND <br />0202 <br />600-140 <br />101 <br />Ethylbenzene <br />0200 <br />ND <br />0203 <br />600-140 <br />101 <br />Xylenes (total) <br />to 0 600 <br />ND <br />0 564 <br />600-140 <br />940 <br />Methyl tert-butyl ether <br />1.0200 <br />ND <br />0 178 <br />600-140 <br />890 <br />Surrogate a,a,a-Trifluorotoluene <br />to0200 <br />0204 <br />600-140 <br />102 <br />Matrix Spike Dup <br />0060232-MSD1 <br />5006242-01 <br />Benzene <br />6123/00 0200 <br />ND <br />0 189 <br />mg/kg <br />60 0-140 <br />94 5 <br />25 0 0 <br />Toluene <br />0200 <br />ND <br />0204 <br />600-140 <br />102 <br />250 0 985 <br />Ethylbenzene <br />0200 <br />ND <br />0202 <br />600-140 <br />101 <br />25 0 0 <br />Xylenes (total) <br />0 600 <br />ND <br />0 560 <br />600-140 <br />933 <br />25 0 0 747 <br />Methyl tert-butyl ether <br />0200 <br />ND <br />0 185 <br />600-140 <br />925 <br />25 0 —3 86 <br />Surrogate a a a-Trifluorotoluene <br />0200 <br />0207 <br />600-140 <br />103 <br />uoia Analytical - Sacramento <br />*Refer to end of report jor text of notes ana uejirrucurW <br />Page 6 of 7 <br />