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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364-96ZS0 • FAX(415)364-9233 <br /> Waterworic C11en2 Project ID: W0601.E LocY d Stockton,WPRR <br /> 1710 Main Street <br /> EscaJon, CA 95320 <br /> Attention: Bill Channell OC Sample Group: 2033056.58 <br /> Reported: Mar 26, ISM <br /> QUALITY CONTROL DATA REPORT <br /> rALM WrouryN.savwnc <br /> 1fumum Chromium <br /> Method: EPA 24.5.1 EPA 2042 EPA VV2 EPA 7196 <br /> Anaty= J.Marom F.Corown F.Contreras V.AMaitis <br /> Reporting Units: mp/L nV/L nV/L m0/L <br /> Date Analyzed: Mar 2o, 1992 Mar 24. 1992 Mar 24, 1992 Mar 19, 1992 <br /> OC Sample fit: 203-"1 2M-3056 27L3056 2=33069 <br /> Sample Conc: N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 0.00--0 0.10 0.10 0.50 <br /> • Conc. Matrix <br /> Spike: 0.0019 0.091 0.094 0.56 <br /> Matrix Spike <br /> %Recovery: 95 91 94 112 <br /> Conc. Matrtx <br /> Spike Dup.: 0.0019 0.092 0.096 0.52 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 95 92 96 104 <br /> Relative <br /> • %Difference: " -4 1.1 2.1 7.4 <br /> SEOUOIA ANALYTICAL %we rr. Conc.of M.S.-Come.of sarnw. RICO <br /> Sp+k.Cone.AGoeo <br /> a/V1 a fa.rew.s Oiffererm: Conc.of M.S..Cone.at M.&D. RICO <br /> icon.of M.S. • Cone.of M.S.O.) 2 <br /> roiect Manager <br /> 2CO3056.WA1 cia> <br />