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Cambria Environmental <br />Sequoia <br />Chesapeake Drive <br />*N. Wige[ lane <br />Redwood City. CA i <br />Walnut Creek. CA 9 8 <br />(650) 364-96 <br />(925) 988-9600M <br />FAX (650) 3649233 <br />FAX (925) 988-9673 <br />D <br />N/A <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921 -0 100 <br />Aubrey Cool <br />Reported: <br />1455 McDowell Blvd. North. Ste. D <br />Petaluma. CA 94954 <br />(707) 792-1865 <br />FAX (707) 792-0342 <br />� <br />Analytical <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 <br />Sampled: <br />4/29/99 <br />270 Perkins Street <br />Project Number: <br />N/A <br />Received: <br />4/29/99 <br />Sonoma, CA 95476 <br />Project Manager: <br />Aubrey Cool <br />Reported: <br />5/6/99 <br />Total Purgeable Hydrocarbons (C6-02), BTEX and MTBE by DHS L <br />Sequoia Analytical - Sacramento <br />Date Spike Sample QC Reporting Limit Recov. RPD RPD <br />Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br />Batch: 9050044 Date Prepared: 5/4/99 <br />Blank 9050044-BLKI <br />Purgeable Hydrocarbons 5/4/99 <br />Extraction <br />ND mg/kg <br />Method: EPA 50308 (MeOH) <br />1.00 <br />Benzene <br />ND <br />0.00500 <br />Toluene <br />ND <br />0.00500 <br />Ethylbenzene <br />ND <br />0.00500 <br />Xylenes (total) <br />ND <br />0.00500 <br />Methyl tert-butyl ether <br />ND <br />0.0500 <br />Surrogate: a,a,a-Tris luorotoluene 0.100 <br />0.179 <br />60.0-140 89.5 <br />US <br />Benzene <br />5/4/99 <br />0.200 <br />0.196 <br />mg/kg <br />70.0-130 <br />98.0 <br />Toluene <br />0.200 <br />0.210 <br />70.0-130 <br />105 <br />Ethylbenzene <br />0.200 <br />0.213 <br />70.0-130 <br />106 <br />Xylenes (total) <br />0.600 <br />0.574 <br />70.0-130 <br />95.7 <br />Methyl tert-butyl ether <br />0.200 <br />0.177 <br />70.0-130 <br />88.5 <br />Surrogate. a,a,a-Triiluorotoluene <br />0.200 <br />0.185 <br />60.0-140 <br />92.5 <br />Matrix Spike <br />Benzene <br />9050044 -MSI <br />5/4/99 <br />S905036-04 <br />0.200 <br />ND <br />0.168 <br />mg/kg <br />60.0-140 <br />84.0 <br />Toluene <br />0.200 <br />ND <br />0.185 <br />60.0-140 <br />92.5 <br />Ethylbenzene <br />0.200 <br />ND <br />0.190 <br />60.0-140 <br />95.0 <br />Xylenes (total) <br />0.600 <br />ND <br />0.528 <br />60.0-140 <br />88.0 <br />Methyl tert-butyl ether <br />0.200 <br />ND <br />0.156 <br />60.0-140 <br />78.0 <br />Surrogate: a,a,a-Tris luorotoluene <br />0.200 <br />0.181 <br />60.0-140 <br />90.5 <br />Matrix Spike Duo <br />Benzene <br />9050044-MSDI <br />5/4/99 <br />5905036-04 <br />0.200 <br />ND <br />0.172 <br />mg/kg <br />60.0-140 <br />86.0 <br />25.0 <br />2.35 <br />Toluene <br />0.200 <br />ND <br />0.180 <br />60.0-140 <br />90.0 <br />25.0 <br />2.74 <br />Ethylbenzene <br />0.200 <br />ND <br />0.193 <br />60.0-140 <br />96.5 <br />25.0 <br />1.57 <br />Xylenes (total) <br />0.600 <br />ND <br />0.534 <br />60.0-140 <br />89.0 <br />25.0 <br />1.13 <br />Methyl tert-butyl ether <br />0.200 <br />ND <br />0.162 <br />60.0-140 <br />81.0 <br />25.0 <br />3.77 <br />Surrogate: a,a,a-Triuoroto/uene <br />Batch: 9050050 <br />Date Prepared: <br />0.100 <br />5/5/99 <br />0.190 <br />Extraction <br />60.0-140 <br />Method: EPA <br />95.0 <br />50308 (MeOH) <br />Blank <br />Purgeable Hydrocarbons <br />9050050-BLKI <br />5/5/99 <br />ND <br />mg/kg <br />1.00 <br />Benzene <br />ND <br />0.00500 <br />Toluene <br />ND <br />0.00500 <br />Ethylbenzene <br />ND <br />0.00500 <br />Xylenes (total) <br />ND <br />0.00500 <br />Methyl tert-butyl ether <br />ND <br />0.0500 <br />Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions. <br />1 � <br />an ra R. anon, Client Services Represen[atrve <br />Paee 5 of 8 <br />