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15) Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9733 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 VWAnalytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 Blaine Tech Services, Inc Client Project ID Chevron 9-8632/950907-K1 985 Timothy Drive Matrix Liquid San Jose, CA 95133 'Attention Jim Keller Work Order# 9509502-01 Reported Sep 19, 1995 QUALITY CONTROL DATA REPORT Analyte 1,1-Dichloro- Trichloro- Chloro- ethene ethene benzene OC Batch# GCO91295801024A GCO91295801024A GC091295801024A Analy Method EPA 8010 EPA 8010 EPA 8010 Pree Method EPA 5030 EPA 5030 EPA 5030 Analyst A.L1 A.u A. u MS/MSD # 950947602 950947602 950947602 Sample Cone N D N D N D Prepared Date 9/12/95 9/12/95 9/12/95 Analyzed Date 9/12/95 9/12/95 9/12/95 Instrument I D # GCHP24 GCHP24 GCHP24 Cone Spiked 25pg/L 25pg/L 25pg/L Result 22 18 22 MS %Recovery 88 72 88 Dup. Result 24 18 23 MSD% Recov 96 72 92 RPD 87 00 44 RPD Limit 0-50 0-50 0-50 LCS # BLK091295 BLK091295 BLK091295 Prepared Date 9/12/95 9/12/95 9/12/95 Analyzed Date 9/12/95 9/12/95 9/12/95 Instrument I D # GCHP24 GCHP24 GCHP24 Cone Spiked 25pg/L 25pg/L 25pg/L LCS Result 23 18 22 LCS %Recov .. 92 72 88 LCS 28-167 35-146 38-150 Control Limits Please Note The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, ngg AN LYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample fortified with known quantities of specific compounds and subjected to the entire analytical procedure If the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix interference,the LCS recovery is to be used to validate the batch nner **MS=Matrix Spike,MSD=MS Duplicate,APD=Relative%Difference Project Manager 9509502 BLA -�5>