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0- 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 /> %07 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 9-2033/951 1 1 6-Z3 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order # 9511 D14-01 Reported Nov 30, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC112095BTEX20A GC112095BTEX20A GC112095BTEX20A GC112095BTEX20A <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 # 951143326 951143326 951143326 951143326 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 11/20/95 11/20/95 11/20/95 11/20/95 <br /> Analyzed Date 11/20/95 11/20/95 11/20/95 11/20/95 <br /> Instrument I D # GCHP20 GCHP20 GCHP2o GCHP20 <br /> Conc Spiked 10pg/L 10Ng/L 10ug/L 30pg/L <br /> Result 11 10 10 31 <br /> MS % Recovery 110 100 100 103 <br /> Dup Result 10 10 10 30 <br /> MSD % Recov 100 100 100 100 <br /> RPD 95 00 00 33 <br /> RPD Limit 050 0-50 0-50 0-50 <br /> LCS # BLK112095 BLK112095 BLK112095 BLK112095 <br /> Prepared Date 11/20/95 11/20/95 11/20/95 11/20/95 <br /> Analyzed Date 11/20/95 11/20/95 11/20/95 11/20/95 <br /> Instrument I D # GCHP20 GCHP20 GCHP20 GCHP20 <br /> Cone Spiked 10 ug/L 10 pg/L 10 ug/L 30 pg/L <br /> LCS Result 11 10 10 30 <br /> LCS % Recov 110 100 100 100 <br /> LCS 71 133 72-128 72130 71-1200 <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 /> • SOg <br /> I LYTICAL 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 tall within specified control limits due to Matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> P enner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9511D14 BLA <3> <br />