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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650),364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) X21 0100 <br /> Iwo + <br /> V�Blaine Tech Services, Inc' rr r —Client Project Il]��` Shell Stockton j 980112-H2 r rr r <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> ;,Attention Fran Thie Work Order# 9801694-02 Reported Jan 30, 1998, <br /> r r .r n . ♦ . ♦ v v rr xrr " r r r r r r r v r r r r r 1rr • ♦rcl`'.yr rr x rr r r ~ rr } 'x r <br /> QUALITY CONTROL DATA REPORT <br /> Analyte- Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#: GCO12798STEX17A GCO12798STEX17A GC012798BTEX17A GCO12798BT©C17A GCO12798BTEX17A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A.Miraftab A. Miraftab A.Miraftab A.Miraftab A.Miraftab <br /> MS/MSD #- 98o1844o1 980184401 980184401 980184401 980184401 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Analyzed Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Instrument I D.#- GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> Result 10 94 94 29 61 <br /> MS % Recovery 100 94 94 97 102 <br /> Dup Result 96 91 88 28 59 . <br /> MSD %R@COV- 96 91 88 93 98 <br /> RPD 41 32 66 35 33 <br /> —RPD Limit — 0-25 -- 0-25 0-25 0-25 0-25 <br /> LCS # BLK012798 BLK012798 BLK012798 BLK012798 BLK012798 <br /> Prepared Date 1/27/98-1/27/98-1/27/98 -1/27/98 1/27/98 <br /> Analyzed Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Instrument I D.# GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10pg/L 10pg/L 10,ug/L 30pg/L 60pg/L <br /> LCS Result 99 94 93 28 59 <br /> LCS %Recov 99 94 93 93 98 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70.130 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 /> SEll LYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sampl <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure <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 /> Pr <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9801694 BLA a4> <br />