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r1 <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 6 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project 1D Shell Stockton/970206-H2 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9702578-02-05 Reported Mar 4, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#- GCO21497STEX21A GCO21497BTEX21A GCO21497BTEX21A GCO21497BTEX21A <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 Jlrsa D Jirsa D Jirsa <br /> MS/MSD# 970230506 970230506 970230506 970230506 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 2/14/97 2/14/97 2/14/97 2/14/97 <br /> Analyzed Date 2/14/97 2/14/97 2/14/97 2/14/97 <br /> Instrument 1 D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10 pg/L 10 Ng/L 10 jig/L 30 Ng/L <br /> Result 10 10 10 31 <br /> •MS % Recovery 100 100 100 103 <br /> ❑up Result 10 10 10 32 <br /> MSD % Recov 100 100 100 107 <br /> RPD 00 00 00 32 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# BLK021497 BLK021497 BLK021497 BLK021497 <br /> Prepared Date 2/14/97 2/14/97 2/14/97 2/14/97 <br /> Analyzed Date 2/14/97 2/14/97 2/14/97 2/14/97 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10 ug/L 10 ug/L 10 yg/L 30 pg/L. <br /> LCS Result 92 92 93 29 <br /> LCS %Recov 92 92 93 97 <br /> 60-140 60-140 60-140 60140 <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 /> SSE A ALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 /> Peg Jenner <br /> Project Manager ;" MS=Matrix Spike,MSD=MS Duplicate,RPI]=Relative% Difference 9702578 BLA <2> <br /> r� <br />