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Sequoia 6$O Chesapeake Drrve 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 /> a- ) $19 Striker Avenue Swte 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 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 /> ATC Associates, Inc(1) Project ATC Projects Sampled 4/7/99 <br /> 1117 Lone Palm Ave,Suite B Project Number- Pacific Coast Recreation 16393 0001 Received 4/8/99 <br /> Modesto,CA 95351 Project Mana er Drew Van Allen Reported 4/23/99 <br /> Volatde Organic Oxygenated Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9040066 Date Prepared 4/13/99 Extraction Method EPA 5030B 1P/Tl <br /> Blank 9040066-BLK1 <br /> Ethanol 4/13199 ND ug/1 3000 <br /> Tert-butyl alcohol It ND 200 <br /> Methyl tert-butyl ether ND 2 00 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 1 2-Dichloroethane-d4 500 528 760-114 106 <br /> Blank 9040066-BLK2 <br /> Ethanol 4/13/99 ND ug/1 3000 <br /> Tert-butyl alcohol " ND M 200 <br /> Methyl tert-butyl ether it ND M 200 <br /> sopropyl ether ND 200 <br /> 1 tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 12-Dichloroethane-d4 500 536 760-114 107 <br /> Blank 9040066-BLK3 <br /> Ethanol 4/14/99 ND ug/1 3000 <br /> Tert-butyl alcohol ND 200 <br /> Methyl tent-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tent-butyl ether ND it 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 1,2-Dichloroethane-d4 Soo 533 760-114 107 <br /> LCS 9040066-BSI <br /> Methyl tert-butyl ether 4/13/99 500 46 1 ug/l 700-130 922 <br /> Surrogate 1,2-Dichloroethane-d4 11 500 519 If 760-114 104 <br /> LCS 9040066-BS2 <br /> Methyl tert-butyl ether 4/13/99 500 525 ug/1 700-130 105 <br /> Surrogate 1 2-Dichloroethane-d4 It <br /> 500 55 1 it 760-114 110 <br /> LCS 9040066-BS3 <br /> Methyl tert-butyl ether 4/14/99 500 498 ug/t 700-130 996 <br /> Surrogate 1,2-Dichloroethane-d4 500 524 fe 760-114 105 <br /> Matrix Spike 9040066-MSI L904017-05 <br /> thyI tert-butyl ether 4/13/99 500 566 121 ug/1 600-140 129 <br /> Tcquoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 8 of 10 <br />