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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Dave • Redwood City.CA 94063 <br /> (415) 364-9600 • FAX(415)364-9233 <br /> IN <br /> Watem=k Client Project ID: W0367, Wng Island Resort/Stockton 4 <br /> 1710 Main Street <br /> Escak^CA 95320 <br /> Attention. Tina LePage OC Sample Group: 204-3281 Reported: Apr 27. i <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> Method: EPA e020 EPA 8020 EPA SM EPA 8020 EPA 8015 <br /> Analyst MApp MMPP M.3Wpp M.fJpp M.Tran <br /> Reporting Units: PO/f_ P9/L l+e/L P9X Pg/- <br /> Date Analyzed- Apr 23, 1992 Apr 23, 9992 Apr 23, 1992 Apr 23, 1992 Apr 22, 1992 <br /> OC Sample#. GBK042392 GBK042392 GBK042392 GBKD42392 OBLXID42192 <br /> Sample Cone.: N D N.D. N D. N D N.D. <br /> Spike Conc. <br /> Added: 10 10 10 30 300 <br /> Conc.Matrix <br /> Spike: 11 11 10 32 300 <br /> Matrix Spike _ <br /> %Recovery: 110 110 100 107 100 - <br /> Conc.Matrix <br /> Spike Dup.: 10 10 9.9 30 320 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 100 100 99 100 110 <br /> Relative <br /> WDitierehee: 9.5 95 10 6.5 6.5 <br /> r <br /> EQU01A ANALYTICAL %Recovery, Conc of: C e x 100 <br /> Cone.Added <br /> Aelatwe%Difference* Conc.of M.S.-Conc.of M.S.D. z 100 <br /> F,% <br /> Conc of M S. + Conc.of M.SM 2 <br /> Manager 2D43?B1.WAT <9> <br />