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1 �Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia <br /> ® 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> �„� Analytical 1455 McDowell Blvd. North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707)792.0342 <br /> 1551 Industrial Road San Carlos,CA 94070-41 1 1 (650)232-9600 FAX(650)232-9612 <br /> Pinnacle-C.P. Project: ARCO,5469,Stockton CA Sampled: 2/11/99 <br /> 3939 Cambridge Road,Ste. 220 Project Number: N/A Received: 2/12/99 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps Reported: 3/l/99 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LUFT/Quality Control <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: 9020177 Date Prepared: 2/16/99 Extraction Method PA 5030B(MeOH) <br /> Blank 9020177-BLKI <br /> Purgeable Hydrocarbons 2/16/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene „ <br /> ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Surrogate: a,a,a-Trifluorotoluene 0.100 0.193 60.0-140 96.5 <br /> LCS 9020177-BSI <br /> Benzene 2/16/99 0.200 0.189 mg/kg 70.0-130 94.5 <br /> Toluene 0.200 0.192 70.0-130 96.0 <br /> Ethylbenzene 0.200 0.191 70.0-130 95.5 <br /> Xylenes(total) 0.600 0.578 70.0-130 96.3 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.195 71 60.0-140 97.5 <br /> Matrix Spm 9020177-MS1 5902186-01 <br /> Benzene 2/16/99 0.200 ND 0.196 mg/kg 60.0-140 98.0 <br /> Toluene 0.200 ND 0.196 60.0-140 98.0 <br /> Ethylbenzene 0.200 ND 0.195 60.0-140 97.5 <br /> Xylenes(total) 0.600 ND 0.590 60.0-140 98.3 <br /> Surrogate: a,a,a-Trifluorotoluene 0.100 0.194 60.0-140 97.0 <br /> Matrix Spike Dup 9020177-MSD1 S902186-01 <br /> Benzene 2/16/99 0.200 ND 0.197 mg/kg 60.0-140 98.5 25.0 0.509 <br /> Toluene 0.200 ND 0.189 60.0-140 94.5 25.0 3.64 <br /> Ethylbenzene 0.200 ND 0.196 " <br /> 60.0-140 98.0 25.0 0.512 <br /> Xylenes(total) 0.600 ND 0.592 60.0-140 98.7 25.0 0.406 <br /> Surrogate: a,a,a-Trifluorotoluene 0.100 0.194 60.0-140 97.0 <br /> Batch: 9020187 Date Prepared: 2/16/99 _Extraction Method: EPA 503013(MeOH) <br /> Blank 9020187-BLK1 <br /> Purgeable Hydrocarbons 2/16/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Surrogate: a,a,a-Yrifluorotoluene 0.200 0.185 60.0-140 92.5 <br /> LCS 9020187-BSI <br /> Benzene 2/16/99 0.200 0.179 mg/kg 70.0-130 89.5 <br /> Toluene 0.200 0.182 70.0-130 91.0 <br /> Sequoia Analytical-Sacrament7Repres <br /> *Refer to end of report for text of notes and definitions. <br /> � <br /> Ronald W. Bobel,Client ServicePage I 1 of 15 <br />