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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 (510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (915) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /961125-A3 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Fran Thle Work Order# 9611122 -01-06 Reported Dec 11, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# G0120596BTEX21A GC120596BTEX21A GC120596BTEX21A GC120596STEX21A <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 Jirsa D Jirsa D Jirsa D Jirsa <br /> MS/MSD# 9611G1504 9611G1504 9611131504 9611G1504 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 12/5/96 12/5/96 12/5/96 12/5/96 <br /> Analyzed Date 12/5/96 12/5/96 12/5/96 12/5/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10pg/L 10pg/L 10ug/L 30pg/L <br /> Result 11 96 94 28 <br /> MS % Recovery 110 96 94 93 <br />. Dup Result 10 91 91 28 <br /> MSD % Recov 100 91 91 93 <br /> RPD 95 53 32 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS#. EILK120596 BLK120596 BLK120596 BLK120596 <br /> Prepared Date. 12/5/96 12/5/96 12/5/96 12/5/96 <br /> Analyzed Date 12/5/96 12/5/96 12/5/96 12/5/96 <br /> Instrument LD #. GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10ug/L 10Ng/L 10pg/L 30pg/L <br /> LCS Result 10 96 96 29 <br /> LCS % Recov 100 96 96 97 <br /> M M � 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 OIA NALYTICAL 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 validale the batch <br /> Pe Pe <br /> Pr sect Manager **MS=Matnx Spike,MSD=MS Duplicate,RPD=Relative Difference 9611122 BLA <1 <br />