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Cambria Environmental <br />Sequoia <br />hesapeake Drive <br />404 N. Wiget lane <br />Redwood ClCA 9 <br />Walnut Creek.k, CA 94 <br />4 <br />(650) 369600 <br />(925) 988-9600 <br />FAX () 364-9233 <br />FAX (925925) 988-9673 <br />,5)- <br />4/29/99 <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />0.200 <br />14551455 McDowell Blvd. North, Ste. D <br />Petaluma, CA 94954 <br />(707) 792-1865 <br />FAX (707) 792-0342 <br />VQF <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 LUEI � <br />Sequoia Analytical - Sacramento <br />Date Spike Sample QC Repotting Limit Recov. RPD RPD <br />e..ol.nn analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br />Blank (continued) 9050005-BLKI <br />Surrogate: a,a,a-Triuorotoluene 512199 0.200 0.185 mg/kg 60.0-140 92.5 <br />LCS <br />Benzene <br />5/2/99 <br />0.200 <br />0.188 <br />mg/kg <br />70.0-130 <br />94.0 <br />Toluene <br />0.200 <br />0.201 <br />70.0-130 <br />101 <br />Ethylbenzene <br />0.200 <br />0.203 <br />70.0-130 <br />101 <br />Xylenes (total) <br />0.600 <br />0.551 <br />70.0-130 <br />91.8 <br />Methyl tert-butyl ether <br />0.200 <br />0.167 <br />70.0-130 <br />83.5 <br />Surrogate: a,a,a-Tris luorotoluene <br />0.200 <br />0.183 <br />60.0-140 <br />91.5 <br />Matrix Spike <br />Benzene <br />9050005 -MSI <br />5/2/99 <br />S904402-12 <br />0.200 <br />ND <br />0.182 <br />mg/kg <br />60.0-140 <br />91.0 <br />Toluene <br />0.200 <br />ND <br />0.192 <br />P60.0-140 <br />96.0 <br />Ethylbenzene <br />0.200 <br />ND <br />0.192 <br />60.0-140 <br />96.0 <br />Xylenes (total) <br />0.600 <br />ND <br />0.523 <br />60.0-140 <br />87.2 <br />Methyl tert-butyl ether <br />0.200 <br />ND <br />0.169 <br />60.0-140 <br />84.5 <br />Surrogate: a,a,a-Triiluorotoluene <br />" <br />0.200 <br />0.188 <br />60.0-140 <br />94.0 <br />Matrix Spike Dull <br />Benzcnc <br />9050005-MSD1 <br />5/2/99 <br />5904402-12 <br />0.200 <br />ND <br />0.182 <br />mgHkg <br />60.0-140 <br />91.0 <br />25.0 <br />0 <br />Toluene <br />0.200 <br />ND <br />0.183 <br />P. <br />60.0-140 <br />91.5 <br />25.0 <br />4.80 <br />Ethylbenzene <br />0.200 <br />ND <br />0.193 <br />160.0-140 <br />96.5 <br />25.0 <br />0.519 <br />Xylenes (total) <br />0.600 <br />ND <br />0.525 <br />60.0-140 <br />87.5 <br />25.0 <br />0.343 <br />Methyl tert-butyl ether <br />0.200 <br />ND <br />0.175 <br />60.0-140 <br />87.5 <br />25.0 <br />3.49 <br />Surrogate: a,a,a-Tris luorotoluene <br />" <br />0.200 <br />0.184 <br />60.0-140 <br />92.0 <br />Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions. <br />Sandra R. Hanson, Client Services Representative <br />Page 12 of 15 <br />