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ti f� <br /> 1455 McDowell Blvd,North, ate D <br /> ` <br /> Sequoia uoia Petaluma, CA 94954 <br /> ter i 1 (707) 792-1865 <br /> 4 = FAX(707) 792-0342 <br /> Analyt 1. l <br /> Sequoia San Carlos Project Subbed in Sampled 4/8/99 <br /> 1551 Industial Blvd Project Number L904098 Received 4/12199 <br /> San Carlos,CA 94070 Project Manager Mike Gregory Reported 4126/99 <br /> Volatile Organic Compounds by EPA Method'8260B/Quality Control <br /> 3 <br /> Sequoia Analytical-Petaluma _ <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Lmut % Notes* <br /> Batch 9040415 Date Prepared 4/17199 Extraction Method EPA 5030 waters <br /> Blank 9040415-BLKI <br /> Tert-amyl methyl ether 4117/99 ND ugll 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 a ND 0 500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 100 <br /> Methyl tert-butyl ether - _ ND 0 500 <br /> Surrogate Dibromofluoromethane 500 485 860-118 970 <br /> Surrogate 1,2-Drchloroethane-d4 to500 469 800-120 938 <br /> Surrogate Toluene-d8 if500 488 880-110 976 <br /> Surrogate 4-Bromofluorobenzene of 500 505 860-115 101 <br /> Blank 9040415-BLK2 <br /> Tert-amyl methyl ether 4/19/99 ND ug/1 100 <br /> Tert-butyl alcohol ND " 200 <br /> Di-isopropyl ether ND " 100 <br /> 1,2-Dtbromoethane(EDS) ND 1. 0 500 <br /> 1,2-Drchloroethane - ND 0. 0 500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 100 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate DtbromofluoromeMane to500 450 it860-118 900 <br /> Surrogate 1,1-Drchloroethane-d4 11 500 442 " 800-120 884 <br /> Surrogate Toluene-d8 11500 457 " 880-110 914 <br /> Surrogate 4-Bromofluorobenzene H500 480 of 860-115 960 <br /> Blank 9040415-BLK3 <br /> Tert-amyl methyl ether 4/20/99 ND ug/l 100 <br /> Tert-butyl alcohol ND 200 _ <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDS) ND 0 500 <br /> 1,2-Drchloroethane ND 0500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 100 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate Dibromofluoromethane or500 458 if 860-118 916 <br /> Surrogate 1,2-Drchloroethane-d4 500 446 or800-120 892 <br /> Surrogate Toluene-d8 500 456 880-110 912 <br /> Surrogate 4-Bromofluorobenzene 500 464 860-115 928 <br /> Sequoia Analytical-Petaluma 'Refer to end of report for text of notes and definitions <br /> Page 3 of 5 <br />