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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> IWV Analytleal 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Pinnacle-C.P. Project: ARCO,5469,Stockton CA Sampled: 2/17/99 <br /> 3939 Cambridge Road,Ste. 220 Project Number: N/A Received: 2/17/99 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps Reported: 2/25,3/3/99 <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: 9020200 Date Prepared- 2/18/99 Extraction Method: FPA 50308 OH) <br /> Blank 9020200-B .K1 <br /> Purgeable Hydrocarbons 2/18/99 ND mg/kg 1.00 <br /> Benzene <br /> Toluene ,. ND �� 0.00500 <br /> ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.169 60.0-140 84.5 <br /> LCs 9020200-BSI <br /> Benzene 2/18/99 0.200 0.185 mg/kg 70.0-130 92.5 <br /> Toluene 0.200 0.188 70.0-130 94.0 <br /> Ethylbenzene 0.200 0.188 70.0-130 94.0 <br /> Xylenes(total) 0.600 0.570 70.0-130 95.0 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.180 60.0-140 90.0 <br /> Matrix Spike 9020200-1VIS1 5902232-02 <br /> Benzene 2/18/99 0.200 ND 0.172 mg/kg 60.0-140 86.0 <br /> Toluene 0.200 ND 0.241 " <br /> 60.0-140 120 <br /> Ethylbenzene 0.200 ND 0.179 60.0-140 89.5 <br /> Xylenes(total) 0.600 ND 0.547 60.0-140 91.2 <br /> Surrogate. a,a,a-Trifluorotoluene 0.200 0.188 60.0-140 94.0 <br /> Matrix Spike D up 9020200-MSD1 S902232-02 <br /> Benzene 2/18/99 0.200 ND 0.170 mg/kg 60.0-140 85.0 25.0 1.17 <br /> Toluene 0.200 ND 0.206 60.0-140 103 25 0 15.2 <br /> Ethylbenzene 0.200 ND 0.177 60.0-140 88.5 25.0 1.12 <br /> Xylenes(total) 0.600 ND 0.542 60.0-140 90.3 25.0 0.992 <br /> Surrogate: a,a,a-Triuorotoluene .0.200 0.187 60.0-140 93.5 <br /> Batch: 9020246 Date Prepared: 2/19/99 _Extraction Method; FPA 5030B(MeOH) <br /> Blank 9020246-BLK1 <br /> Purgeable Hydrocarbons 2/19/99 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-Trifluorotoluene 0.200 0.180 60.0-140 90.0 <br /> IES 90202_ 46-BS1 <br /> Benzene 2/19/99 0.200 0.191 mg/kg 70.0-130 95.5 <br /> Toluene 0.200 0.194 70.0-130 97.0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Ronald W. Bobel,Client Services Repilesentative Page 5 of 9 <br />