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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 , <br /> Sequoia 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)921-0 100 <br /> 455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> Analytical '1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Pinnacle-C P Project ARCO 06020,Manteca,CA Sampled 4/21/99 <br /> 3939 Cambridge Road, Ste 220 Project Number N/A Received 4121/99 <br /> Cameron Park,CA 95682 Project Manager Joel Coffman Reported 4127199 <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. 9040249 Date Prepared, 4123/99 ExtractionMethQd, _EPA 5Q30B(PIT) , <br /> Blank <br /> Purgeable Hydrocarbons 4123/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) i ND 0 500 <br /> Surrogate a a a-Trifluorotoluene 100 830 600-140 830 <br /> LLS 9040249-BSI <br /> Benzene 4123/99 - 100 908 ug/1 700-130 908 <br /> Toluene 100 883 700-130 88 3 <br /> Ethylbenzene too 899 700-130 899 <br /> Xylenes(total) 300 270 700-130 900 <br /> Surrogate a a a-Trifluorotoluene T 100 - 832 600-140 832 - - <br /> Matrix Spike 9040249-MSI 5904261-03 <br /> Benzene 4/23/99 too ND 859 ug/3 600-140 859 <br /> Toluene 100 ND 856 600-140 85 6 <br />-= Ethylbenzene = __ ___' - _=10 0-- ND_ — 8 68— _ __ 60_0-140=_86 8 = <br /> Xylenes(total) 300 ND 25 9 600-140 863 <br /> Surrogate -a a a-Triuorotoluene— _,10 0 7 76_ _ 60 0-140— 776 <br /> Matrix Spike Du P 9040249-MSDI _ S904261-03_ <br /> Benzene 4/23/99 too ND 892 ug/1 600-140 89 2 250 377 <br /> Toluene 100 ND 898 600-140 898 25 0 4 79 <br /> Ethylbenzene 100 ND 899 600-140 89 9 25 0 3 51 <br /> Xylenes(total) 300 ND 271 600-140 903 25 0 453 <br /> Surrogate a a a-Trifluorotoluene 100 800 600-140 800 a <br /> I <br /> r <br /> Sequoia Analytical-Sacrament *Refer to end of report for text of notes and definmons <br /> l v Lam-, <br /> J�7 <br /> Ronald W Bobel,Client Services Representative Page 4 of 6'Q <br />