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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9133 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton/970131-Z1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9702115 10 Reported Feb 13, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Tnchlorc- Chloro- <br /> ethene ethene Benzene <br /> QC Batch#. GCO20697801009A GCO20697801009A GCO20697801009A <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# 970212501 970212501 970212501 <br /> Sample Conc N D N D N D <br /> Prepared Date 2/6/97 2/6/97 2/15/97 <br /> Analyzed Date 2/6/97 2/6/97 2/6/97 <br /> Instrument I D # GCHP9 GCHP9 GCHP9 <br /> Conc. Spiked' 25 Ng/L 25 ug/L 25 pg/L <br /> Dilution Factor 1 1 1 <br /> Result 27 26 26 <br /> MS%Recovery 108 104 104 <br /> Dup result 26 25 25 <br /> WiSD % Recov 104 100 100 <br /> RPD 38 39 39 <br /> RPD Limit 0-25 0-25 0-25 <br /> LCS# BLK021097BS BLK0210976S BLK021097BS <br /> Prepared Date 2/10/97 2/10/97 2/10/97 <br /> Analyzed Date 2/10/97 2/10/97 2/10/97 <br /> Instrument I D # GCHP9 GCHP9 GCHP9 <br /> Conc. Spiked 25 pg/L 25,ug/L 25Ng/L <br /> LCS Result 22 23 23 <br /> LCS % Recov 88 92 92 <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 ALYTICAL 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 K <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 /> e enner ""MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> 0 e anager 9702115 BLA <6> <br />