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Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> IT) 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)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 /960823-K2 <br /> '985 Timothy Drive Matrlx Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9608F64-04 Reported Sep 18, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#- GCO90896BTEX02A GCM896BTEX02A GCO90896BTEX02A 00090896BTEX02A <br /> Analy Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Burton R Burton R Burton R Burton <br /> MS/MSD # 96OBF1003 9608F1003 960SF1003 96081`1003 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 9/8/96 9/8/96 9/8/96 9/8/96 <br /> Analyzed Date 9/8/96 9/8/96 9/8/96 9/8/96 <br /> Instrument I D # GCHP2 GGHP2 GCHP2 GCHP2 <br /> Conc Spiked 10{rg/L 10Ng/L 1oNg/L 30yg/L <br /> Result 94 85 82 26 <br /> MS %Recovery 94 65 82 87 <br /> Dup Result 96 87 82 28 <br /> MSD % Recov 96 87 82 93 <br /> RPD 21 23 00 74 <br /> RFD Limit 0.25 0-25 0-25 0-25 <br /> LCS #- BLK090896 BLK090896 BLK090896 BLK090896 <br /> Prepared Date 9/8/96 9/8/96 9/8/96 9/8/96 <br /> Analyzed Date 9/8/96 9/8/96 9/8/96 9/8/96 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10Ng/L 10Ng/L 10Ng/L 30jig/L <br /> LCS Result 10 91 88 28 <br /> LCS % Recov.. 100 91 88 93 <br /> MS/MSD 60-140 60-140 60-140 60-140 <br /> LCS 70-130 715-130 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 /> S OI ANALYTICAL 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 /> Pe enner <br /> ,raject Manager **MS=Matrix Spike,MSD=MS Duplicate,RPR=Relative% Difference 9608F64 BLA e3> <br />