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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 Chevron 9-1918/951031-M2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9511065-02 Reported Nov 13, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GC Batch#. OC110395BTEX17A GC1103956TEX17A GC110395BTEX17A GC110395BTEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Woo J Woo J Woo J Woo <br /> MS/MSD # 951OL1008 95101-1008 951OL1008 951OL1008 <br /> Sample Cone ' N D N D N D N D <br /> Prepared Date 11/3/95 11/3/95 11/3/95 11/3/95 <br /> Analyzed Date 11/3/95 11/3/95 11/3/95 11/3/95 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10yg/L 10Ng/L 10yg/L 30ftg/L <br /> Result 11 11 11 32 <br /> • MS % Recovery 110 110 110 107 <br /> Dup Result 11 10 10 31 <br /> MSD %Recov 110 100 100 103 <br /> RPD 00 95 95 32 <br /> RPD Limit 0-50 0.50 050 0-50 <br /> LCS # BLK102795 BLK102795 BLK102795 BLK102795 <br /> Prepared Date 11/3/95 11/3/95 11/3/95 11/3/95 <br /> Analyzed Date 11/3/95 11/3/95 11/3/95 11/3/95 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10Yg/L 10ug/L 10yg/L 30ug/L <br /> LCS Result 98 97 97 29 <br /> LCS %Recov 98 97 97 97 <br /> MS/MSD <br /> LCS 71-133 72-128 72-130 71120 <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 /> • SEQUOIA ANALYTICAL 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 /> n - 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 Pdhner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPO=Relative%Difference 9511065 BLA <2> <br />