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Sequoia <br />15) <br />680 Chesapeake Drive <br />*,..t 104 N. Wiget Lane <br />819 Stoker Avenue. Suite 8 <br />Redwood City. C. "9063 <br />Walnut Creek. (4598 <br />Sacramento, CA 95834 <br />(650) 3649600 <br />(925) 988-9600 <br />(916) 921-9600 <br />FAX (650) 364-9233 <br />FAX (925) 988-9673 <br />FAX (916) 921-0100', <br />Project Number: <br />14551455 McDowell Blvd. North, Ste. D <br />Petaluma, CA 94954 <br />(707) 792-1865 <br />FAX (707) 792-0342 <br />qQF <br />1551 Industrial Road <br />San Carlos, CA 94070-4111 <br />(650) 232-9600 <br />FAX (650) 232-9612 <br />Cambria Environmental <br />Project: <br />EQUILON, 1313 E. Charter Way, Stockton, CA Sampled: <br />4/29/99 <br />270 Perkins Street <br />Project Number: <br />N/A Received: <br />4/29/99 <br />Sonoma, CA 95476 <br />Project Manager: <br />Aubrey Cool Reported: <br />5/4, 7/99 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT/Quality Control <br />Sequoia Analytical - Sacramento <br />Batch: 9040339 <br />Blank <br />Purgeable Hydrocarbons <br />Benzene <br />Level <br />Date Prepared: 4/30/99 <br />9040339-BLKI <br />4/30/99 <br />Result Result <br />ND mg/kg 1.00 <br />ND " 0.00500 <br />Recov. RPD RPD <br />Toluene ND 0.00500 <br />Ethylbenzene ND 0.00500 <br />Xylenes (total) ND 0.00500 <br />Methyl tert-butyl ether ND 0.0500 <br />Surrogate: a,a,a-TriIluorotoluene 0.200 0.193 60.0-140 96.5 <br />LCS <br />Benzene <br />4/30/99 <br />0.200 <br />0.207 <br />mg/kg <br />70.0-130 <br />103 <br />Toluene <br />0.200 <br />0.223 <br />70.0-130 <br />112 <br />Ethylbenzene <br />0.200 <br />0.224 <br />70.0-130 <br />112 <br />Xylenes (total) <br />0.600 <br />0.604 <br />70.0-130 <br />101 <br />Methyl tert-butyl ether <br />0.200 <br />0.190 <br />70.0-130 <br />95.0 <br />Surrogate: a,a,a-Triuorotoluene <br />0.200 <br />0.197 <br />60.0-140 <br />98.5 <br />Matrix Spike <br />Benzene <br />9040339 -MSI <br />4/30/99 <br />S904400-01 <br />0.200 <br />ND <br />0.176 <br />mg/kg <br />60.0-140 <br />88.0 <br />Toluene <br />0.200 <br />ND <br />0.194 <br />60.0-140 <br />97.0 <br />Ethylbenzene <br />0.200 <br />ND <br />0.196 <br />60.0-140 <br />98.0 <br />Xylenes (total) <br />0.600 <br />ND <br />0.537 <br />60.0-140 <br />89.5 <br />Methyl tert-butyl ether <br />0.200 <br />ND <br />0.168 <br />60.0-140 <br />84.0 <br />Surrogate: a,a,a-Tris luorotoluene <br />0.200 <br />0.187 <br />60.0-140 <br />93.5 <br />Matrix Spike Dup <br />Benzene <br />9040339-MSDI <br />4/30/99 <br />S904400-01 <br />0.200 <br />ND <br />0.177 <br />mg/kg <br />60.0-140 <br />88.5 <br />25.0 <br />0.567 <br />Toluene <br />0.200 <br />ND <br />0.184 <br />60.0-140 <br />92.0 <br />25.0 <br />5.29 <br />Ethylbenzene <br />0.200 <br />ND <br />0.196 <br />60.0-140 <br />98.0 <br />25.0 <br />0 <br />Xylenes (total) <br />0.600 <br />ND <br />0.540 <br />60.0-140 <br />90.0 <br />25.0 <br />0.557 <br />Methyl tert-butyl ether <br />0.200 <br />ND <br />0.175 <br />60.0-140 <br />87.5 <br />25.0 <br />4.08 <br />Surrogate: a,a,a-Triuorotoluene <br />0.200 <br />0.195 <br />60.0-140 <br />97.5 <br />Batch: 9050005 <br />Blank <br />Purgeable Hydrocarbons <br />Benzene <br />Toluene <br />Ethylbenzene <br />Xylenes (total) <br />Methyl tert-butyl ether <br />Date Prepared: 5/2/99 <br />9050005-BLKI <br />5/2/99 ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />Extraction Method: EPA 50308 (MeOHI <br />mg/kg 1.00 <br />0.00500 <br />0.00500 <br />0.00500 <br />0.00500 <br />0.0500 <br />Sequoia Analytical - Sacramento *Refer to end of report for text ofnotes and definitions. <br />S n ra R. Hanson, Client Services Representative <br />Page I 1 of 15 <br />