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Sequoia 680 Chesapeake Drive Redwood Gty,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 9-2033 / 970519-1-12 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9705657-01 Reported Jun 4, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC052897BTEX17A GC052897BTEX17A GC052897BTEX17A GCO52897BTEX17A GCO528973TEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A.Miraftab A Miraftab A. Miraftab A. Miraftab A Miraftab <br /> MS/MSD# 9705B1803 970581803 9705B1803 9705B1803 970561803 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date 5/28/97 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date 5/28/97 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Instrument 1 D # GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10pg/L 10Ng/L 101ig/L 30pg/L 60ug/L <br /> Result 97 98 97 29 59 <br /> 0 M % Recovery 97 98 97 97 98 <br /> Dup. Result 10 98 98 29 59 <br /> MSD % Recov - 100 98 98 97 98 <br /> RPD 30 00 10 00 00 <br /> RPD Limit 0-25 0.25 0-25 0-25 025 <br /> LCS# BLK052897 BLK052897 BLK052897 BLK052897 BLK052897 <br /> Prepared Date. 5/28/97 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date 5/28/97 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10Ng/L 10pg/L 10pg/L 30Ng/L 60ug/L <br /> LCS Result. 10 10 10 31 61 <br /> LCS % Recov .. 100 100 100 103 102 <br /> 60.140 60-140 60.140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 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 /> OI 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 <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 /> eg enner <br /> ect Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9705B57 BLA -3> <br />