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a s <br /> r ne� <br /> K"';rte"` " +. '" ... Y <br /> r.: <br /> SEQUOIA AALY I� AL <br /> 680 Chesapeake Drive Redwoody, <br /> CA 4063 <br /> (415)354.9800 0 FAX(415)364-9233 <br /> I <br /> ,"Olein Environmental Coris:_itants CIIan4 Project"!l): 8 58E,4iiartar Wsy, <br /> I'+350 Data Drivel j <br /> 'Rancno Cordova.CA 95670 <br /> Reported' May 2, 1991 # <br /> PAttentioh: Hai Dihm C1C Sample Group 1044560 1044566y gN �� hNrc: N <br /> QUALITY CONTROL DATA P.EPORT <br /> A Ti= Benzene <br /> Tiluana Ethyl Xyienee <br /> Ben2ene _ <br /> FPA EPA EPA EPA <br /> Mathod: 6015/nM 8016/6040 6415/5020 8015/6020 <br /> Analyst: S.Chleffo S.Chieffo S.Chieffo S.Chieffo <br /> Reporting Unl:6: rg ng ng <br /> Date Analyzed: Apr 30, 1991 Apr 30, 1991 Apr 30, 1991 Apr 30, 1991 <br /> QC Sample#: StMA3091 BLK043091 BLK043091 BU(043091 s <br /> P <br /> Sample Colic.. N.D. N.D. N.D. N.D. r <br /> F <br /> Spike Conc. i <br /> j C.tf$o$: 100 100 1100 300 <br /> i <br /> Conc.MatrU <br /> Spike: 94 94 94 280 e <br /> a <br /> Matrix Spike 94 94 93 i <br /> %Recovery: 94 <br /> Cone.Matrix 280 <br /> Spilka Dup.: 95 95 93 }.. <br /> Matrix Spike <br /> Duplicate 93 93 <br /> Recovery: 95 95 <br /> Relative <br /> ° Olfference: 1.1 1.1 1.1 0.0 <br /> Y <br /> r 'EV� ' <br /> UOIr4`ANALYTICAL %Recovery Conc. Conc.of,ample x 100 <br /> Spike <br /> �� 'ry ' <br /> 'r 13@faii+re 96 Difference; Conc.01 M.S.-Cone.of M.S.D, x 100 <br /> '= ' � (Conc,of M.S.t Conc.of M.S.p.l 2 --- <br /> NiaBirray pt gar 10445fi0.i7LT n> { <br /> Project Manager <br /> , r, <br />