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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> S <br /> ' t .+ ,.,...., j k 14x . ,.,. f �,.,v.z , .,�.....,..,ryux,y «e• Y ,., w-xrty xr Ly.,.,,. =..,4h,.y,.,.wyw.,r""'�71.f'+ooro;"fi""ww.�rvovxi+ a <br /> Emcon Associates Client Project ID *7910 Lower Sacto Rd.5to"n Shell <br /> 1433 N Market Blvd <br /> Sacramento,CA 95834 <br /> Attention Sheila Kruse OC Sample Group 2023350-52 Reported Feb 26, 1992 <br /> ' OUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> 1 Method EPA 8020 EPA 8024 EPA 8020 EPA 8020 <br /> Analyst D Dreblow 0 Drebiow D Drebiow 0 Dreblow <br /> ' Reporting Units. lrg/L pg/L Ng/L Mg/L <br /> Date Analyzed Feb 24, 1992 Feb 24, 1992 Feb 24, 1992 Feb 24, 1992 <br /> OC Sample# GBLK022492 GBLK022492 GBLKD22492 GBLK022492 <br /> ' Sample Conc.: N D N D N D N D <br /> Spike Cone. <br /> Added: 10 10 10 30 <br /> Conc. Matnx <br /> Spike. 91 9 6 10 31 <br /> Spike <br /> Matrix Sp f <br /> %Recovery: 91 96 100 103 <br /> Conc.Matrix <br /> Spike Dup.: 91 97 11 31 <br /> ' Matrix Splice <br /> Duplicate <br /> %Recovery: 91 97 110 103 <br /> Relative <br /> ' %Difference: 00 10 9 5 00 <br /> ( SEOUOIA ANALYTICAL %Recovery- Cone of M S -Cone of Sampie x 100 <br /> Spike Cone Added <br /> _ Relative%Ddference Cone of MS -Cone of M S 0 z 100 <br /> Made A. Springer (Cone of M S + Cone of M S 0)/2 <br /> ' Project Manager 20x3350 EEE <2> <br /> a <br />