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6) 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 93834 (916) 92t 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264 /961105-C1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9611258 -01-03 Reported Nov 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch##: GC110796BTEX18A GC110796BTEX18A GC1107968TEX18A GC110796STEX18A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. R Geckler R Geckler R Geckler R Geckler <br /> MS/MSD #- 9610J0002 9610JO002 9610J0002 9610J0002 <br /> Sample Cone N D N D NO N D <br /> Prepared Date 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Instrument I D # GCHP18 GCHP18 GCHP18 GCHP18 <br /> Cone Spiked 10ug/L 10pg/L long/L 30Ng/L <br /> Result 92 95 98 29 <br /> MS % Recovery 92 95 98 97 <br /> Dup Result: 91 95 96 29 <br /> MSD % Recov.: 91 95 96 97 <br /> RPD' 11 00 21 00 <br /> RPD Limit 0-25 0.25 025 0-25 <br /> LCS #' BLK110796 BLK110796 BLK110796 BLK110796 <br /> Prepared Date 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date' 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Instrument I D #: GCHP18 GCHP18 GCHP18 GCHP18 <br /> Cone Spiked- 10pg/L 10pg/L 10yg/L 30ug/L <br /> LCS Result 91 95 98 29 <br /> LCS% Recov 91 95 98 97 <br /> MS/M 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrtx that is analyzed using the same reagents, <br />"eggy <br /> ANPL 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 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 /> *`MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9611258 BLA 4 1> <br />