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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)3649233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 %00 FAX(510) 988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 92 1-0 100 <br /> #r Blaine Tech Services, Inc h Cherrt Project Ib She11 Stockton}/971009-01 <br /> s 1680 Rogers Ave Matrix Liquid <u <br /> ,'San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9710593-10-12 Reported Oct 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#. GC102097BTEX03A GC1020978TEX03A GC102097BTEX03A GC102097BTEX03A GC102097BTEX03A <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#- 971073403 971073403 971073403 971073403 971073403 <br /> Sample Conc ' N D N D N D N D N D <br /> Prepared Date 10/20/97 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Analyzed Date 10/20/97 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Instrument I D.# GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10 pg/L 10 pg/L 10 pg/L 30 pg/L 60 pg/L <br /> Result 87 86 85 24 68 <br /> MS % Recovery 87 86 85 80 113 . <br /> Dup. Result 89 87 87 24 70 <br /> MSD % Recov 89 87 87 80 117 <br /> RPD 23 12 23 00 29 <br /> RPD Limit- -----0-25 0-25 0-25 0-25 0-25 <br /> LCS#' BLK102097 BLK102097 BLK102097 BLK102097 BLK102097 <br /> Prepared Date 10/20/97 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Analyzed Date 10/20/97 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Instrument I D# GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10pg/L 10pg/L lopg/L 30pg/L 60pg/L <br /> LCS Result 82 81 so 22 64 <br /> LCS %Recov 82 81 80 73 107 <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 reagen <br /> S ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of samp <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 /> Peg Pe <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9710591 BLA <3> <br />