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6) 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 /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 970709-F1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9707592-10 Reported Jul 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Trlchloro- Chloro- <br /> ethene ethene Benzene <br /> OC Batch# GC071797801015A GC071797801015A GC071797801015A <br /> Analy Method EPA 8010 EPA 8010 EPA 8010 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 <br /> Analyst E Cunanan E Cunanan E Cunanan <br /> MS/MSD # 970755901 970756901 970756901 <br /> Sample Conc N D N D N D <br /> Prepared Date 7/17/97 7/17/97 7/17/97 <br /> Analyzed Date 7/17/97 7/17/97 7/17/97 <br /> Instrument I D # GCHP15 GCHP15 GCHP15 <br /> Conc Spiked 25 ug/L 25 Erg/L 25 ug/L <br /> Result 28 21 30 <br /> •MS % Recovery 112 84 120 <br /> Dup Result 28 21 30 <br /> MSD % Recov 112 84 120 <br /> RPD 00 00 00 <br /> RPD Limit 0-25 0-25 0-25 <br /> LCS # BLK071897 ELK071897 BLK071897 <br /> Prepared Date 7/18/97 7/18/97 7/18/97 <br /> Analyzed Date 7/18/97 7/18/97 7/18/97 <br /> Instrument I D # GCHP15 GCHP15 GCHP15 <br /> Conc Spiked 25ug/L 25ug/L 25ug/L <br /> LCS Result 26 20 28 <br /> LCS % Recov 104 80 112 <br /> MS/MSD 60-140 60-140 60-140 <br /> LCS 65-135 70-130 70-130 <br /> Control Li its <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> OIA NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an alLquot 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 /> P ggy ginner **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Pr ec Manager 8707592 BLA 43n <br />