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(1) <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 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 /> "Rlalne Tech Services, Inc Client Project IID Shell, Stockton A <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9609337 -01 Reported Sep 18, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> CC Batch# GCO915WBTEX21A GCO91596BTEX21A GCO91596BTEX21A GCO91596BTEX21A <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 #• 960909606 960909606 960909606 960909606 <br /> Sample Conc . N D N D N D N D <br /> Prepared Date' 9/15/96 9/15/96 9/15/96 9/15/96 <br /> Analyzed Date 9/15/96 9/15/96 9/15/96 9/15/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked 10Ng/L 10pg/L 10pg/1- 30 fig/L <br /> Result. 11 10 10 31 <br /> MS % Recovery 110 100 100 103 <br /> Dup Result 10 10 99 30 <br /> MSD % Recov : 100 100 99 100 <br /> RPD: 95 00 10 33 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> LCS #- 13LK091596 BLK091596 BLK091596 BLK091596 <br /> Prepared Date 9/15/96 9/15/96 9/15/96 9/15/96 <br /> Analyzed Date 9/15/96 9/15/96 9/15/96 9/15/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10Ng/L 10{rg/L 10,ug/L 30Ng/L <br /> LCS Result: 94 92 92 28 <br /> LCS % Recov.. 94 92 92 93 <br /> M 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> i <br /> Please Mote <br /> The LCS Is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> r,.- P Yz 9 9 <br /> E LIOI 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 fail within specified control limits due to matrix <br /> ` interference,the LCS recovery is to be used to validate the batch <br /> g <br /> 1P Penner <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference 9609337 BLA <1> <br />