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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 /> 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 /> V San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9704278 -10-13 Reported Apr 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. 1,1-Dichloro- Tnchloro- Chloro- <br /> ethene ethene Benzene <br /> QC Batch#' GCO40997801009A GC040997801009A GC040997801009A <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 # 970428010 970428010 970428010 <br /> Sample Conc . N D 76 N D <br /> Prepared Date: 4/9/97 4/9/97 4/9/97 <br /> Analyzed Date. 4/9/97 4/9/97 4/9/97 <br /> Instrument LD # GCHP09 GCHP09 GCHP09 <br /> Conc Spiked. 25ug/L 25ug/L 25ug/L <br /> Dilution Factor. 1 1 1 <br /> Result 20 32 26 <br /> 40S % Recovery 80 98 104 <br /> Dup Result 28 30 23 <br /> WiSD % Recov- 112 90 92 <br /> RPD 33 65 12 <br /> RPD Limit 0-20 0-20 0-20 <br /> LCS# VBLK040997BS VBLK040997BS VBLK040997BS <br /> Prepared Date: 4/9/97 4/9/97 4/9/97 <br /> Analyzed Date 4/9/97 4/9/97 4/9/97 <br /> Instrument 1 D #. GCHP09 GCHP09 GCHP09 <br /> Conc. Spiked 25 ug/L 25 ug/L 25 ug/L <br /> LCS Result: 25 21 21 <br /> LCS % Recov .. 100 84 84 <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 /> U A NALVTICAL 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 H <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 /> egg enner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> ole t Manager Page 1 of 2 9704278 BLA <7> <br />