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Sequoia680 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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-%00 FAX(916)9Z 1-0100 <br /> ta), 1455 McDowell Blvd North 5#e D Petaluma CA 94954 (707)792-1865 FAX{707} 792-0342 <br /> WO Analyticall1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> '! <br /> Sequoia Analytical-San Carlos Project N/A Sampled 4/14/99 <br /> 1551 Industnal Blvd Project Number (WO#L904195) Received 4/20199 <br /> San Carlos, CA 94070 Project Manager Mike Gregory _ Reported 4130199 <br /> Total Purgeable Hydrocarbons (1176-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 Units Recov Limits % Limit- % Notes* <br /> Batch, 9040231 Date Prepared, 4120199 Extraction Method EPA 5030B(P/T) <br /> Blatt k 9040231-BL KI <br /> Purgeable Hydrocarbons 4/20/99 ND ug/l Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Surrogate a s a-Trifluorotoluene 10 0 935 600-140 935 <br /> LCS 9040231-BS1 <br /> Benzene 4/20/99 100 9 83 ug/l 700-130 98 3 <br /> Toluene 100 9 76 700-130 976 <br /> Ethylbenzene 10 0 974 700-130 974 <br /> Xylenes(total) 300 294 700-130 98 0 <br /> Methyl tert-butyl ether 100 11 7 700-130 117 <br /> Surrogate a a a-Trifluorotoluene 100 9 91 600-140 991 <br /> Matrix Snil{e 2040231-MSI 5904240-01 <br /> Benzene 4/20/99 100 ND 102 ug/l 600-140 102 <br /> Toluene 10_OND 9 93 60 9-14Q 993 <br /> Ethylbenzene 100 ND 105 600-140 105 <br /> Xylenes(total) 300 ND 313 600-140 104 <br /> Methyl tert-butyl ether 100 ND 226 600-140 NR 1 <br /> Surrogate a a a-Trifluorotoluene 100 9 10 600-140 910 <br /> Matrix ixi Dun 9040231=MSD1 5904240=01 — <br /> Benzene 4/20/99 100 ND 9 71 ug/l 600-140 97 1 25 0 492 <br /> Toluene too ND 979 600-140 97 9 25 0 142 <br /> Ethylbenzene 10 0 ND 9 95 600-140 995 25 0 538 <br /> Xylenes(total) 300 ND 300 600-140 100 25 0 3 92 <br /> Methyl tert-butyl ether l0 0 ND 12 2 600-140 122 25 0 598 2 <br /> Surrogate a a a-Trfluorotoluene " 100 932 600-140 932 <br /> Batch X040248 Date Prepared, 4121129 Extraction Method, EEA 5030B(P/T) <br /> Blank 9040248-BLK1 <br /> Purgeable Hydrocarbons 4/21/99 ND ug/1 50 0 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Sequoia Analytical Sacramento *Refer to end of report for test of notes and defim <br /> Sandra R Hanson,Client Services Representative Page 6 of 10 <br />