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' / \ Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5 10)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc' Client Project ID Shell, Stockton, 960730-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9608098 -01 -02 Reported Aug 22, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GC Batch# GC080896BTEX03A GC080896STEC03A GCO80896BTE<03A GCO80896BTEK03A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst D Jjrsa D Jirsa D Jirsa D Jirsa <br /> MS/MSD# G9608H08-04 G9608H48-04 G9608H08-04 (396081-108-04 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 8/8/96 8/8/96 8/8/96 8/8/96 <br /> Analyzed Date 8/8/96 8/8/96 8/8/96 8/8/96 <br /> Instrument 1 D # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Cone Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 95 94 96 29 <br /> MS % Recovery 95 94 96 97 <br /> Dup Result 96 98 98 29 <br /> MSD % Recov 96 98 98 97 <br /> RPD 10 42 21 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # GBLK080896 GBLK080896 GBLK080896 GBLK080896 <br /> Prepared Date- 8/8/96 8/8/96 8/8/96 8/8/96 <br /> Analyzed Date 8/8/96 8/8/96 8/8/96 8/8/96 <br /> Instrument I D # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Cone Spiked 10 ug/L. 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result: 99 9 8 99 29 <br /> LCS % Recov.. 99 98 99 97 <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 /> Q A ALYTICAL 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 /> terference,the LCS recovery is to be used to validate the batch <br /> eg enner <br /> Pr et Manager *"MS W Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9608098 BLA <1> <br /> g� <br />