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Se ll 1 1455 McDowell Blvd North Ste D <br /> 4 IDq o a Petaluma CA 94954 <br /> 1 (707) 792-1865 <br /> Analytical FAX(707) 792-0342 <br /> ' Sequoia-RC(Subbed In) Project Kayvon Kimyai Sampled 2/26/99 <br /> 680 Chesapeake Dr Project Number 9903040 Received 3/3/99 <br /> ' Redwood City,CA 94063 Project Manager Kayvan Kim at Reported 3/8/99 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> ' Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal e Analyzed Level Result Result Units Recov Limits % Lirrut % Notes* <br /> 1 Batch 9030125 Date Prepared 3/4/99 Extraction Method EPA 5030 waters <br /> Blank 9030125-BLKI <br /> Tert-amyl methyl ether 3/4/99 ND ug/l 100 <br />' Tert-butyl alcohol ND 200 <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND It <br /> 0 500 <br /> 1,2-Dichloroethane ND " 0 500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 100 <br /> Methyl tert-butyl ether ND 100 <br /> Surrogate Dibromofluoromethane 500 512 0 860-118 102 <br />' Surrogate 1,2-Drchloroethane-d4 500 531 800-120 106 <br /> Surrogate Toluene-d8 500 508 880-110 102 <br /> Surrogate 4-Bromofluorobenzene 500 510 860-115 102 <br /> Wk 9030125-BLK2 <br /> Tert-amyl methyl ether 3/5/99 ND ug/l 100 <br /> Tert-butyl alcohol ND 1. 200 <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND 0 500 <br /> l,2-Dichloroethane ND 0 500 <br />' Ethanol ND 100 <br /> Ethyl tert-butyl ether " ND " 100 <br /> Methyl tert-butyl ether ND 100 <br /> Surrogate Dibromofluoromethane 500 486 860-118 972 <br /> Surrogate 1,2-Drchloroethane-d4 500 495 800-120 990 <br /> Surrogate Toluene-d8 500 486 880-110 972 <br /> Surrogate 4-Bromofluorobenzene 500 485 860-115 970 <br /> Blank 9030125-BLK3 <br /> Tert-amyl methyl ether 3/5/99 ND ug/1 100 <br /> Tert-butyl alcohol 1. ND 200 <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND 0 500 <br /> 1,2-Drchloroethane ND 0 500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether " ND " 100 <br /> Methyl tert-butyl ether ND 100 <br /> Surrogate Dtbromofluoromethane Soo 494 860-118 988 <br /> k <br /> urrogate 12-Dichloroethane-d4 500 500 800-120 100 <br /> Surrogate Toluene-d8 500 499 880-110 998 <br /> rogate 4-Bromofluorobenzene 500 494 860-115 988 <br />' equoia Analytical-Petaluma 'Refer to end of report for teat of notes and definitions <br /> Page 3 of 5 <br />