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I <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 e Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> �acyAer Technrolr � <br /> Groundwat <br /> "m m <br /> CSS. `a,. <br /> �� r i <br /> ogy Clent Project ID Golden Grain <br /> 4057 Port Chicago Hwy <br /> Concord'CA 94520 8 Reported Dec 15, 1992'15 <br /> Attention Chris Desocio _ {0C SampleGroup 2120135 <br /> x {..,}n ,.W,xn��., .;. 4"y` •, `Yis`�i S9n�`r` <t.+ay' <br /> QUALITY CONTROL DATA REPORT <br /> 1A NALYTE benzene X enes Lead <br /> Benzene Toluene Ethyr <br /> Method EPA 602 <br /> EPA 602 EPA 602 EPA 602 EPA 200 9 <br /> Analyst Chiaravallot, Chwavaftti Chlaravallati Chl ra allo8 D Bayard <br /> Reporting Units us/L Pg/L mgn 9. Dec 9, <br /> Date Analyzed Dec 9, 1992 Dec 12-0083 D 212-0083 2 12'0083 2 2 <br /> -0 36 <br /> CC Sample# 212-M <br /> Sample Cone.: N D N D N D N D 00062 <br /> Spike Cone. 10 i0 20 0 050 <br /> Added: 10 <br /> Conc.Matra 92 94 19 0 060 <br /> Spike: 90 <br /> Matrix Spike 92 94 95 108 <br /> %Recovery: 90 <br /> Conc.Matra 96 97 20 0 060 <br /> Spike Dup.: 93 <br /> Matrix Spike <br /> Duplicate 97 100 108 <br /> %Recovery: 93 96 <br /> Relative 43 31 51 0 fl <br /> %Difference: 33 <br /> Cnc of M S -Gonc of S <br /> am z 100 <br /> SEQUOIA ANALYTICAL Recovery spke Conc Added <br /> au0«v ! Mltw G DKler.nae Cone ofMS -Cone ofMD x 100 <br /> i (Cone of M S + Conc of M S D) 2 <br /> Michael R Giles 2120135GRC a3> <br /> Laboratory Director <br />