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Sequoia 680 Chesapeake Drive Redwood City,CA 9400, (415) 364 9600 rAX (415) 364-9233 <br /> 404N Wiget lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical Big Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> ti x ry ry ? ,. , r ..,♦ v <y <br /> Gettler Ryan/Geostrategies Client Project ID Unocal VES/Balar Unit <br /> 3164 Gold Camp Drive#240 Matrix Liquid <br /> >i <br /> ,,Rancho Cordova, CA 95670 <br /> '.Attention Greg Gurss Work Order# 9611 E03 -01 w Reported Nov 26, 1996y, <br /> 4 <br /> �rr vv + i , } ry ..♦ n r ` � n '4 nr <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC112396BTEX17A GC112396BTEX17A GC112396BTEX17A GC112396BTEX17A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Heider J Heider J Helder J Heider <br /> MS/MSD# 961198203 961198203 961198203 961198203 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 11/23/96 11/23/96 11/23/96 11/23/96 <br /> Analyzed Date 11/23/96 11/23/96 11/23/96 11/23/96 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked: 10pg/L 10pg/L 10Ng/L 30ug/L <br /> Result 98 95 95 28 <br /> .MS %Recovery 98 95 95 93 <br /> Dup Result 95 92 92 27 <br /> MSD % Recov 95 92 92 90 <br /> RPD. 31 32 32 36 <br /> RPD Limit. 0.25 0-25 0.25 0-25 <br /> i4};r v♦ �,} ` + 1 ♦+ v sA r v r . vr `vr v r v l • + ` r h <br /> xen rr♦rr + r r r v r + M1 v v v x n r ry <br /> LCS #- BLK112396 BLK112396 BLK112396 BLK112396 <br /> Prepared Date- 11/23/96 11/23/96 11/23/96 11/23/96 <br /> Analyzed Date- 11/23/96 11/23/96 11/23/96 11/23/96 <br /> Instrument I D #• GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked 10Ng/L 10yg/L 101ig/L 30pg/L <br /> LCS Result- 96 94 93 28 <br /> LCS % Recov 96 94 93 93 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 7121011.10 NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Interference,the LCS recovery is to be used to validate the batch <br /> e Gregory <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9611E03 GET t1> <br />