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1) Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9640 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 01()0 <br /> r <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-2033/ 970519-112 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9705857-02-03 Reported Jun 4, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC052797BTEX17A GC052797BTEX17A GC052797BTEX17A GC052797BTEX17A GC052797BTEX17A <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 D Jirsa D Jirsa D Jirsa D Jirsa D Jirsa <br /> MS/MSD # 970561703 9705B1703 9705B1703 9705B1703 9705B1703 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date 5/27/97 5/27/97 5/27/97 5/27/97 5/27/97 <br /> Analyzed Date 5/27/97 5/27/97 5/27/97 5/27/97 5/27/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10pg/L 10pg/L 10pg/L 30pg/L 60ug/L <br /> Result 10 10 10 30 64 <br /> •MS % Recovery 100 100 100 100 107 <br /> Dup Result 10 10 10 31 64 <br /> MSD % Recov 100 100 100 103 107 <br /> RPD 00 00 00 33 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK052797 BLK052797 BLK052797 BLK052797 BLK052797 <br /> Prepared Date" 5/27/97 5/27/97 5/27/97 5/27/97 5/27/97 <br /> Analyzed Date 5/27/97 5/27/97 5/27/97 5/27/97 5/27/97 <br /> Instrument I D.# GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10pg/L 10pg/L 10pg/L 30pg/L 60ug/L <br /> LCS Result 90 90 91 28 55 <br /> LCS % Recov ,. 90 90 91 93 92 <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 /> UOi 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 If <br /> the reoovery 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 /> Pe Penner <br /> P ject Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD-Relative%Difference 970SB57 BLA 44> <br />