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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 /> 15) Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> %700 <br /> Blaine Tech Services, Inc Client Project ID Shell, Stockton /960905-Li <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9609357-02 Reported Sep 26, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GCO91696BTEX02A GCO91696BTEX02A GC091696BTE(02A GCO91696BTEX02A <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# 960909602 960909602 960909602 960909602 <br /> Sample Conc. N D N D N D N D <br /> Prepared Date 9/16/96 9/16/96 9/16/96 9/16/96 <br /> Analyzed Date' 9/16/96 9/16/96 9/16/96 9/16/96 <br /> instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked' 10 ug/L 10 ug/L 10 ug/L 30 Fig/L <br /> Result 11 10 96 32 <br /> MS % Recovery 110 100 96 107 <br /> Dup Result- 12 11 10 34 <br /> 10 MSD % Recov 120 110 100 113 <br /> RPD 87 95 41 61 <br /> RPD Limit. 0-25 0-25 0-25 0-25 <br /> LCS#' BLK091696 BLK091696 BLK091696 BLK091696 <br /> Prepared Date- 9/16/96 9/16/96 9/16/96 9/16/96 <br /> Analyzed Date 9/16/96 9/16/96 9/16/96 9/16/96 <br /> instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10ug/L 10N9/L 101ug/L 30N9/L <br /> LCS Result 10 93 88 29 <br /> LCS% Recov : 100 93 88 97 <br /> M M D 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 /> ID $ O 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 tall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> P g y Pen <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative Difference 9609357 BLA <2> <br />