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• 660 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> la 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> Sequo <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0 100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 ( )792 1865 FAX(707) 2-0342 a <br /> 1553 Industria!Road San Carlos CA 94070 41 i 1 (650650 23 <br /> )232 9600 FAX(650)232-9612 <br /> Pinnacle-C P Project ARCO 6020,Manteca,CA Sampled 517199 <br /> 3939 Cambridge Road, Ste 220 Project Number N/A Received 517199 <br /> Cameron Park,CA 95682 Project Manager Joel Coffman Reported 5110199 <br /> 'I otal Purgeable Hydrocarbons(C6-C12),BTEX and MTBE 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 /Snits Recov Limits % Limit %_Notes* <br /> Batch, 9050091 Date Prepared, 5/10199 Extraction Method, EPA 5030B(MeQU) <br /> Blank 2050091-BLKl <br /> Purgeable Hydrocarbons 5/10/99 ND mg/kg 1 00 ' <br /> Benzene ND 000500 <br /> ND 000500 <br /> Toluene <br /> ND 0 00500 <br /> Ethylbenzene �� _ <br /> Xylenes(total) ND 0 00500 <br /> Methyl tent-butyl ether ND 0 0500 <br /> Surrogate a a a-Trifluorotoluene 0200 0 153 600-140 765 <br /> US 9050091-BSI <br /> Benzene 5/10199 - 0200- 0204 mg/kg 700-130 102 <br /> Toluene <br /> 0200 0 213 „ 700-130 106 <br /> Ethylbenzene 0200 0 217 700-130 108 <br /> —Xylenes(total) 0 600 0 650 700-130 108 <br /> Methyl tert-butyl ether 0200 0 154 700-130 77 0 <br /> Surrogate a,a a-Tnfluorotoluene 0200 0 157 600-140 78 5 <br /> 1 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> / Page 4 of 6 e <br /> Ronald W Bobel,Client Services Represents ve <br />