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Sequoia680 Chesapeake Drive Redwood City CA 94063 (651) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510 988-9600 FAX(5 10)988 9673 <br /> x,117 Analytical 819 Sinker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-2033 /980209-A2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9802713-01 Reported Mar 4, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichioro- Trichlorc- Chloro- <br /> ethene ethene Benzene <br /> QC Batch# GCO21798801009A GCO21798801009A GCO21798801009A <br /> Analy Method EPA 8010 EPA 8010 EPA 8010 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 <br /> Analyst M McLachlan M McLachlan M McLachlan <br /> MS/MSD# 980239801 980239801 980239801 <br /> Sample Cone ND ND NO <br /> Prepared Date 2/17/98 2/17/98 2/17/98 <br /> Analyzed Date 2/17/98 2/17/98 2/17/98 <br /> Instrument I D # GCHP9 GCHP9 GCHP9 <br /> Cone Spiked 25yg/L 25yg/L 25ug/L <br /> Result 28 24 26 <br /> MS % Recovery 112 96 104 <br /> Dup Result 26 23 25 <br /> MSD % Recov 104 92 100 <br /> RPD 74 43 39 <br /> RPD Limit 0-25 0-25 0-25 <br /> LCS # BLK021798 BLK021798 BLK021798 <br /> Prepared Date 2/17/98 2/17/98 2/17/98 <br /> Analyzed Date 2/17/98 2/17/98 2/17/98 <br /> Instrument I D # GCHP9 GCHP9 GCHP9 <br /> Cone Spiked 25Ng/L 25yg/L 25,ug/L <br /> LCS Result 23 22 23 <br /> LCS %Recov 92 88 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 /> QUOTA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 /> Peggy Penner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager 980271313LA <9> <br />