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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (5 10) 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 1D Chevron 9-2033 /971117-M2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711066-01-04 Reported Dec 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC112697BTEX02A GC112697BTExo2A GC112697BTExo2A GC112697BTEX02A GC112697BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA S015M <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 # 971179906 971179906 971179906 971179906 971179906 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 11/26/97 11/26/97 11/26/97 11/26/97 11/26/97 <br /> Analyzed Date 11/26/97 11/26/97 11/26/97 11/26/97 11/26/97 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L 60 ug/L <br /> Result 11 11 11 33 78 <br /> MS % Recovery 110 110 110 110 130 <br /> Dup Result 11 11 11 33 77 <br /> MSD % Recov 110 110 110 110 128 <br /> RPD 00 00 00 00 13 <br /> RPD Limit 0.25 0.25 025 025 025 <br /> LCS # BLK112697 h BLK112697 BLK112697 BLK112697 BLK112697 <br /> Prepared Date- 11/26/97 11/26/97 11/26/97 11/26/97 11/26/97 <br /> Analyzed Date 11/26/97 11/26/97 11/26/97 11/26/97 11/26/97 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> LCS Result 1t 11 11 33 77 <br /> LCS %Recov 110 110 110 110 128 <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 /> Vgenner <br /> ALYTICAL 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 /> !Penager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9711066 BLA <3> <br />