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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 /> (a) <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/970402-F1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> .Attention Fran Thie Work Order # 9704278 -04-09 Reported Apr 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Tnchloro- Chloro- <br /> ethene ethene Benzene <br /> QC Batch# GC040897801008A GC040897801008A GC040897801008A <br /> Analy Method EPA 8010 EPA 8010 EPA 8010 <br /> Prep. Method EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Bou-Salman R Bou-Salman R Bou-Salman <br /> MS/MSD# 970425501 970425501 970425501 <br /> Sample Cone N D N D N D <br /> Prepared Date 4/13/97 4/8/97 4/8/97 <br /> Analyzed Date. 4/8/97 4/8/97 4/8/97 <br /> Instrument 1 D #: GCHP09 GCHP09 GCHP09 <br /> Cone Spiked 25 pg/L 25pg/L 25pg/L <br /> Dilution Factor 1 1 1 <br /> Result 22 23 22 <br /> 40S % Recovery 88 92 88 <br /> Dup Result 28 24 24 <br /> MSD % Recov 112 96 96 <br /> RPD 24 43 87 <br /> RPD Limit 0-20 0-20 0-20 <br /> LCS # VBLK040897BS VBLK040897BS VBLK040897BS <br /> Prepared Date 4/8/97 4/8/97 4/8/97 <br /> Analyzed Date 4/8/97 4/8/97 4/8/97 <br /> Instrument I D #. GCHP09 GCHP09 GCHP09 <br /> Cone Spiked 25pg/L 25pg/L 25pg/L <br /> LCS Result 27 23 26 <br /> LCS % Recon: 108 92 104 <br /> 60-140 60-140 60-140 <br /> LCS 65-135 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 /> IA 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 validate the batch <br /> Pe gy Pe **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> r lect Manager 9704278 BLA <6> <br />