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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364-9600 FAX(415) 364.9233 <br /> WatenNoiic Client Project ID: WI0602.1 B.City of Stockton/Banner Island <br /> 1710 Main Street Method (units): EPA 8240(Erg/L purged) O.C.Sample Dates <br /> Escalon, CA 95320 Artatyst(s): G.Meyer /Analyzed: Mar 24, 1992 <br /> Attention: BID Channell OC Sample#: BLKD32392 <br /> Reported: Mar 24, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Cone. Matrix Spike <br /> Conc. Spike Mabix Duplicate Relative <br /> Sample Spike Conc. Matrtx % Spike % <br /> Spike Recovery Analyte Conc. Added SP Duplicate Recovery Difference <br /> 1,1-0ichloro- N.D. so <br /> 45 90 39 78 14 <br /> ethane <br /> _ Trichloroethene N.D. so <br /> 43 86 39 78 9.8 <br /> Benzene <br /> N.D. 5o 44 88 39 78 12 <br /> Toluene <br /> N.D. 50 45 90 40 80 12 <br /> Chlorobenzene N.D. 50 <br /> 43 86 39 78 9.8 <br /> f <br /> SEOUOtA ANALYTICAL t A.ow«r• Conc.of M.S.•Conc.of s.r++ai• a too <br /> $pike Conc.Ado" <br /> � <br /> O�fhnna: Cone.or M.S..Cone.or M.S.D. t too <br /> RNativ�>< !Conc.of M.S. • Conc.o}M.S.D.►/2 <br /> 2p32=.WAT <15> <br /> act Manager <br />