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Sequoia <br />Analytical <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 />)rmect Manager David Evans <br />819 Stnker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916) 921-96M <br />FAX (916) 921-0100 <br />www sequoialabs corn <br />Sampled 6114100 to 6116100 <br />Received 6/19100 <br />Reported 6/23,27/00 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT/Quality Control <br />Sequoia Analytical - Sacramento <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />Analvzed Level Result Result Units Recov Limits % Limit % Notes* <br />Batch 0060206 <br />Date Prepared 6121/00 <br />Extraction Method EPA 50306 McOH <br />Blank <br />0060206-BLKI <br />6121100 0200 <br />0 194 mg/kg <br />Purgeable Hydrocarbons <br />6121100 <br />ND <br />mg/kg 100 <br />Benzene <br />700-130 <br />ND <br />000500 <br />Toluene <br />0 217 <br />ND <br />000500 <br />Ethylbenzene <br />0 600 <br />ND <br />000500 <br />Xylenes (total) <br />9lenes <br />hvl tert-butyl ether <br />ND <br />000500 <br />Methyl tert-butyl ether <br />855 <br />ND <br />00500 <br />Surrogate a a,a-Trifluorotoluen, <br />0200 <br />0196 <br />600-140 980 <br />LCs <br />0060206 -BSI <br />5006252-01 <br />Benzene <br />6121100 0200 <br />0 194 mg/kg <br />700-130 <br />970 <br />Toluene <br />0200 <br />0 215 <br />700-130 <br />108 <br />Ethylbenzene <br />0200 <br />0 217 <br />700-130 <br />108 <br />(total) <br />0 600 <br />0 604 <br />700-130 <br />101 <br />9lenes <br />hvl tert-butyl ether <br />0200 <br />0 171 <br />700-130 <br />855 <br />a,a,a-TriJluorotoluene 0200 <br />0 196 „ 60 U -14U Y6 U <br />Matrix Spike_ <br />0060206 -MSI <br />5006252-01 <br />Benzene <br />6/21100 <br />0200 <br />ND <br />0204 <br />mg/kg <br />600-140 <br />102 <br />Toluene <br />0200 <br />ND <br />0 220 <br />600-140 <br />110 <br />Ethylbenzene <br />0200 <br />ND <br />0 215 <br />600-140 <br />108 <br />Xylenes (total) <br />0 600 <br />ND <br />0 571 <br />600-140 <br />952 <br />Methyl tert-butyl ether <br />0200 <br />ND <br />0 183 <br />600-140 <br />915 <br />Surrogate a,a,a-Triuorotoluene <br />0200 <br />0202 <br />600-140 <br />101 <br />Matrix Spike Dun <br />0060206-MSD1 <br />5006252-01 <br />Benzene <br />6/21100 <br />0200 <br />ND <br />0207 <br />mg/kg <br />600-140 <br />103 <br />250 <br />0 976 <br />Toluene <br />0200 <br />ND <br />0 222 <br />600-140 <br />Ill <br />250 <br />0 905 <br />Ethylbenzene <br />0200 <br />ND <br />0 219 <br />600-140 <br />109 <br />25 0 <br />0 922 <br />Xylenes (total) <br />0 600 <br />ND <br />0 603 <br />600-140 <br />100 <br />25 0 <br />492 <br />Methyl tert-butyl ether <br />0200 <br />ND <br />0 189 <br />600-140 <br />945 <br />250 <br />3 23 <br />Surrogate a,a a-Trifluorotoluene <br />0200 <br />0196 <br />600-140 <br />98 0 <br />Batch 0060257 Date Prepared 6127100 Lxtraction Method EPA 50306M( eOH) <br />Blank 0060257-BLK 1 <br />Purgeable Hydrocarbons 6/27/00 ND mg/kg 100 <br />Benzene ND 000500 <br />Toluene ND 000500 <br />Ethylbenzene ND 000500 <br />Xylenes (total) ND 000500 <br />Why] tert-butyl ether ND 00500 <br />Analytical - Sacramento <br />St fca •v cr,a- J r uY v. •J�• .�-�. J ..---�— --. ___ _ _�_ _.. <br />Page 6 of 8 <br />