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SEQUOIA ANALYTICAL <br /> r Suite 8 • Sacramento, CA 95834 <br /> (91 Strike Avenue, <br /> .. (916) 921-9600 FAX (916) 921-0100 <br /> f cr^ <br /> EMCON Associates Client Project tD sheli.7910 tomer Sacramwft Road. <br /> 1433 N Market Blvd Stodeon,CA <br /> Sacramento, CA 95834 <br /> Attention Jim Patilia OC Sample Group 2080179-81 Reported Aug 20, 1992 <br /> n ,, x>nr n ,, r++•x x +.v w l �. 4 Tr.vrW-wwF � <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene toluene Benzene Xyienea <br /> Method EPA 602 EPA 602 EPA 602 EPA 602 <br /> Analyst Chiaravallot chiaravaliou Chaaravallot Chiaravalkyti <br /> Reporting Units ppm ppm ppm ppm <br /> Date Analyzed Aug 18 1992 Aug 18, 1992 Aug 18, 1992 Aug 18, 1992 <br /> OC Sample # 2080179 208-0179 208-0179 208-0179 <br /> Sample Cone.: N D N D N D N D <br /> Spike Cone. <br /> Added: 0 01 001 001 002 <br /> Cone. Matrix <br /> Spike: 00091 00097 00094 0 018 <br /> Matrix Spike <br /> %Recovery: 91 97 94 90 <br /> Cone. Matrix <br /> Spike Dup.: 00097 001 001 0 019 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 97 100 100 95 <br /> Relative <br /> %Difference: 64 3 6 3 54 <br /> SEQUOIA ANAL CAL %Roomy Cone of M S -Cone of Sample X100 <br /> Spike Conc Added <br /> Relative%Difference Cone of MS -Cone o!M S D X100 <br /> Michael R Giles (Conn MMS + Conc.of M S D) 2 <br /> Laboratory Director <br /> 2080179 EMC c2> <br />