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� I <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921.9600 • FAX 1916) 921.0100 <br /> 01 <br /> o� <br /> ;RESNA Industries Client Project ID:Arco#2130,Siocktori <br /> ';3164 Gold Camp Drive,Suite 200 <br /> Rancho Cordova,CA 95670 <br /> Attention: Eloise Frick CC Sample Group.2010051-53 Reported Jan 14 1992 <br /> QUALITY CONTROL DATA REPORT - <br /> E <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenau { { <br /> Method: EPA 8020 EPA SOLID EPA 8020 FPA 5020 j . <br /> Analyst: C.Chapman C.Chapman C.Chapman C.Chapman i <br /> Reporting Units: ppb Ppb ppb ppb <br /> A� DateAnalyZed: Jan 9. 1992 Jan 9. 1992 Jan 9, 1992 Jan 9, ,992 { <br /> QC Sample#: BLK010992 BLKOIM92 BLK010992 BLKO1e992 <br /> s Sample Conc.: N.D. N.D. N.D. N.D. t <br /> Spike Canc. 4 � <br /> Added: 10 10 10 20 <br /> t. Conc.Matrix <br /> G Spike: 8.7 8.8 8.9 18.9 <br /> =^ Matrix Spike ' <br /> %Recovery: 87 86 89 94 l: <br /> t f* Conc.Matrix <br /> Spike Dup.: 8.9 9.3 9.1 19.4 <br /> Matrix Spike <br /> Duplicate i <br /> %Recovery: 89 93 91 97 <br /> Relative r <br /> %Difference: 1.1 5.5 2.2 2.6 i <br /> - k <br /> ' SEQUOIA ANALYTICAL %Elecavery: Conc.of M.S.-Canc.of Sample 100 s <br /> Spike Conc.Added q <br /> Relative%Ditfarence: Conc.9f M,S.-Canc.of M.S.D. x 100 <br /> Michael R.Was (Cone.of M.S.+Conc.of M.S.D.) 2 ' <br /> ® Laboratory Director 201OD51.RES <4> <br />