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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> • (916) 921.9600 • FAX (916) 921-0100 <br /> Groundwater Techndogy <br /> Client Project ID #023201466,Gilden Grain, Manteca <br /> 4057 Pat Chicago Hwy. <br /> C.oncord'CA 94520 QC Sample Group 21003689 Reported Oct 28, 1992- <br /> Atterrtian• Chris Desoc o " "i" ""�"`I <br /> t io }}�A �i(e4YAC��RWF4��.SS fiY!$v}kii <br /> hx .'�n`2 F •.S4'9'SNtac� <br /> JOAviA-Yx` svGhW+��+�'^9C}ivrR3 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Benzene Toluane Eth benzene nes Lead <br /> Method EPA 602 EPA 602 EPA 602 EPA 502 EPA 2392 <br /> Analyst Chianwallati Chtaravaltoti Chlaravallob Chiaravallob T Mescarenas <br /> Reporting Units pa/L pg/ <br /> I_ iro/L pg/L mo/l. <br /> Date Analyzed Oct 22. 1992 Oct 22, 1992 Oct 22, 1992 22, 1992 Oct 25, 1992 <br /> OC Sample# 210-0369 <br /> 210-0369 210-0369 210-0369 210-0047 <br /> Sample Cone.: N D <br /> ND ND ND ND <br /> Se Cone. 20 20 <br /> Aikdded: 10 10 10 <br /> Cone.Matrix 92 91 17 22 <br /> Spike: 86 <br /> Matrix Spike 92 91 85 110 <br /> %Recovery: 86 <br /> Cone. Matrix 92 92 17 20 <br /> Spike Dup.: 86 <br /> Matrix Spike <br /> Duplicate92 92 100 <br /> %Recovery: 86 <br /> Relative 0 1 1 00 95 <br /> %Difference: 00 <br /> 0 <br /> Cone of M S •Canc o1 Sun I• x 100 <br /> iSEQUOIA ANALYTICAL %Reoo�rarf SPLke Conn Added <br /> Relative 76 t)Ifhrenoe Conc of M S -Cone of MSD x 100 <br /> Conc of M S + Conc of M 5 01 2 � <br /> Michael R Giles <br /> Laboratory Director 2100368 Gt�C <3' <br />