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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 1equoia1 n t <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical� 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> w <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232 9600 FAX(650)232 9612 <br /> �! <br /> Sequoia-Petaluma Project Scott Forbes Sampled 3/11/99 <br /> 1455 N McDowell Blvd,Suite D Project Number P903469 Received 3/23/99 <br /> Petaluma,CA 94954 Project Manager ScottForbes Reported 4/6/99 <br /> Date Spike ` Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed LevelResult Result Units Recoy_Limits IN, Limit % Notes* <br /> Batch 9030107 Date Prepared 3/24/99 Extraction Method EPA 5030B [P/Ti <br /> Blank 9030107-BLKi <br /> 1,2-Dibromoethane 3/24/99 ND ug/l 200 <br /> 1,2-Dichloroethane ND 200 <br /> Dl-isopropyl ether " ND 2 00 <br /> Ethyl tert-butyl ether ND 2 00 <br /> Methyl tert-butyl ether ND 0 500 <br /> Tert-amyl methyl ether ND 200 <br /> Ten-butyl alcohol It ND 100 <br /> Surrogate 1,2 Dtchloroethane-d4 500 462 760-114 92 4 <br /> Surrogate Toluene-d8 500 475 880-110 95 0 <br /> Blank 9030107-BLK2 <br /> 1,2-Dibromoethane 3/25/99 ND 119/1 2 00 <br /> 1,2-Drchloroethane ND 2 00 <br /> Di-isopropyl ether ND 200 • <br /> Ethyl tert-butyl ether ND 200 <br /> Methyl tert-butyl ether ND 0 500 <br /> Tert-amyl methyl ether ND „ 2 00 <br /> Tert-butyl alcohol ND 100 <br /> Surrogate 1,2-Dtchloroethane-d4 500 456 760-114 912 <br /> Surrogate Toluene-d8 500 498 " 880-110 99 6 <br /> LCS 9030107-BSI <br /> Methyl tert-butyl ether 3/24/99 500 395 ug/l 700-130 79 0 <br /> Surrogate 1,2-Dichloroethane-d4 If 500 480 760-114 96 0 <br /> Surrogate Toluene-d8 ly 50 0 504 880-110 101 <br /> LCS 9030107-BS2 <br /> Methyl tert-butyl ether 3/25/99 500 499 ug/1 700-130 998 <br /> Surrogate 1,2-Dzch1oroethane-d4 It 500 472 IT 760-114 944 <br /> Surrogate Toluene-d8 if 500 476 rt 880-110 952 <br /> Matrix Spike 9030107-MSI L903193-01 <br /> Methyl tert-butyl ether 3/24/99 - 500- - -- 527 568 ug/1 700-130 103 <br /> Surrogate _1,22Dtchloroethane-d4 it 500 467 " 760-114 93 4 <br /> Surrogate Toluene-d8 50 0 493 " 880-110 98 6 <br /> Matrix Spike Du 9030107-MSD1 L903193-01 - — - <br /> Methyl tent-butyl ether 3/25/99 500 527 523 ug/l 700-130 94 1 250 903 <br /> Surrogate 1,2-Dtchloroethane-d4 500 48 0 IF 760-114 96 0 <br /> Surrogate Toluene-d8 50 0 491 880-110 98 2 <br /> Sequoia Analytical-San Carlos *Refer to end of report far text of notes and definitions �) <br /> Page 6 of 7 <br />