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- 1 <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> Groundwater Technology Client Project 10 *023201466,Golden Grain 229 Moffat.Manteca,CA <br />` 4080 Pike Lane <br /> Concord, CA 94520 <br /> Attention: Chris Desocio nQC Sample Group 2090210-11 n. xY Yxxrr. Reported Sep 18, 1992 <br /> ,.. r .n r "r <br /> x swxFmmrrvw......a.w» »_,. r x r m+-..x... v. ... .. s. c r ... r .r m.,. r n x•,. ... s..x ry .. <br /> i <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 602 EPA 602 EPA 602 EPA 602 <br /> Analyst Chiarav:-1101I ch'ar-'a"at' Ch.a avaliot <br /> Reporting Units ppb Ppb ppb ppb <br /> Date Analyzed Sep 17, 1992 Sep 17, 1992 Sep 17, 1992 Sep 17, 1992 <br /> OC Sample # 209-0196 209-0196 209-0196 209-0196 <br /> Sample Conc : N D N D N D N D <br /> Spike Conc <br /> Added 10 10 10 20 <br /> Conc Matrix <br /> Spike 8 4 8 7 8 8 18 <br /> Matrix Spike <br /> % Recovery 84 87 88 90 <br /> Conc. Matrix <br /> Spike Dup 8 5 87 8 8 18 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery 85 87 88 90 <br /> Relative <br /> % Difference 1 2 0 0 00 00 <br /> At <br /> 0 SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> -0 tL _— �i-Cc� " Relatwe%Difference Conc of M S Conc of M S D x 100 <br /> Michael R Giles {Conc of M S + Conc at M s 0) /2 <br /> Laboratory Director <br /> 2090210 GGG <2> <br />