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SEQUOIA ANALYTICAL <br /> 68'0 Chesapeake Drive • Redw <br /> ood City,CA 94063 <br /> (415) 364-9600 FAX(415)364-92333 <br /> SC :'::�4.{v.:_::::: . .....n:{......:..:v:::.�:.�:.:�::::..:.:....:...:.........:::::::::�:.}.:..........,. \•.v1.•::.hvC:-..:{.::{-.....\4iviii:iii:??:4}::{�iiiiii? <br /> I ¢> aciflc Environmental Group tient Project ID: 310-01.04 <br /> k*2025 Gateway Place,Suite 440 <br /> San Jose,CA 95110 <br /> Attention: Maree Doden QC Sample Group: 3A17001-02 Reported: Feb 4, 1993~:: <br /> r:M.i' <'.;.:vyyv;..v"r9{.wy,•{: {{r{K:�{.:vH":n::•v:r..::::�v:-..v:v:v::.::??i <br /> v.. :. •.....v..fi0.�..A....{1.a.�\�C.......:.-......v.n:..::.T:-i.... .:in {. h:. ... ,.Of.•'l 'h{{{.n:ii•.:{:is{:i.^:f.{�v{i R"r;:r::4:%{i'"i'ri{�-ri n't::::{:.i?'-:"+iifti�F-Y{ 1. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> AnalySt: r M.Nipp M.Nipp M.Nipp, M.Nipp <br /> Reporting Units: "; Erg/L Erg/L jrg/L Erg/L <br /> Date Analyzed: Jan 22, 1993 Jan 22, 1993 Jan 22, 1993 Jan 22, 1993 <br /> GSC Sample#:. 3AO8701 3AO8701 3AO8701 3AO8701 <br /> i Sample Conc.: N.D. N.D. N.D. N.D. <br /> i <br /> ;pike Cone. <br /> Added: 10 10 10 30 <br /> I <br /> Conc.Matrix <br />' Spiker 9.9 9.9 9.8 29 <br /> Matrix Spike <br /> %Recovery: 99 99 98 97 <br /> f <br /> Conc.Matrix ' <br /> r _ <br /> Spike Dup.: ,1 .` 9.8 9.9 9.6 29 <br /> Matrix Spike <br /> i. Duplicate <br /> %Recovery: " . 98. 99 96 97 <br /> i. <br /> Relative <br /> %Difference: 1.0 0.0 2.1 0.0 <br /> err <br /> QUOTA ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample X100 <br /> Spike Conc.Added <br /> 47 Relative%Difference: Cone.of M.S.-Conc.of M.S.D. x 100 <br /> I Eileen A. Manning y; „ (Conc.of M.S. + Conc.of M.S.D.)/2 <br />! Project Manager 3A17001.PPP <2> <br />