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I <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeak3 Drive - Redwood City,CA 94063 <br /> (415)364-9600 - FAX(415)364-9233 <br /> x ^e'.c sc.. a...,^°7;,:..'�..w......w.•i:.X�.o�.:..«.....%%M..:.. a....x..,..�. f.......^.w,,.rrx4`..,w...w ""y.L'....,;"' ww',..,','.. <br /> aWaterwork Client Protect 1D 367/Chevron, Stockton <br /> i1710 Main Street <br /> ;}Escalon, CA 95320 <br /> Attention Tina LePage OC Sample Group 1063516-3518 Reported. JU 8, 1991 <br /> �Ji!{rt^'C'n y.x x xwF5G30J0'u}+MS6"nv *SM elf^]V.S.`ritt.v `Y3+i.N' y 5*Vii i}JN^4 W,O{+'W+Mfinv `V` {['4`Fa <br /> � <br /> +"!']C.3hfv y v..1.SLisw^e. Cu[u^>.�dhx]..dfJ}�]b4G3J.FrL7ElrsiOir ��nxsP"' AGT��iitet�Y. i. NR' Y"�• <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst. G Meyer a Meyer G Meyer G Meyer <br /> Reporting Units- ng ng ng ng <br /> Date Analyzed Jul 1, 1991 Jul 1, 1991 Jul 1. 1991 Jul 1. 1991 <br /> QC Sample#- GBLK 070191 GBLK 070191 GBLK 070191 GBLK 070191 <br /> Sample Conc : N.D N.D N D N D <br /> Spike Conc <br /> Added' 100 100 100 300 <br /> Conc. Matrix <br /> Spike: 100 100 100 300 <br /> Matrix Spike <br /> % Recovery: 100 100 100 100 <br /> i <br /> Conc. Matrix <br /> Spike pup : 100 100 100 300 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 100 100 100 100 <br /> Relative <br /> %Ditference: 00 00 00 00 <br /> EOUOIA ANALYTICAL %Recovery Conc of M S .Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%afference Conc of M S -Conc of M S 0 x 100 <br /> a et ac (Conc of M S + Conc of M S D)/2 <br /> J P oject Manager 1063516 WAT <2> <br /> 1 <br />