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Sequoia 680 Chesapeake Drive Redwood City,CA 940 (650) 364-9600 FAX(650)364.9233 <br /> 404 N Wiget Lane Walnut Creek CA 94 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project 1D Shell Stockton /971121-G1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 E95 -01-05 Reported Dec 12, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#- GC120597BTEX21A GC120597BTEX21A GC120597BTEX21A GC120597BTEX21A GC120597BTEX21A <br /> Anally. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Miraftab A. Miraftab k Miraftab A.Miraftab A Miraftab <br /> MS/MSD # 9711GIS06 9711G1506 9711131506 9711G1506 9711G1506 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 12/5/97 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Analyzed Date- 12/5/97 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Instrument l D #- GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10Ng/L 10ug/L 10ug/L 30pg/L 60pg/L <br /> Result 97 9 8 10 30 62 <br /> MS % Recovery. 97 98 100 100 103 <br /> 0 Dup Result 10 10 11 30 61 <br /> MSD %Recov 100 100 110 100 102 <br /> RPD 30 20 95 00 16 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS# BLK120597 BLK120597 BLK120597 BLK120597 BLK120597 <br /> Prepared Date 12/5/97 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Analyzed Date 12/5/97 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Instrument 1 D# GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10 Mg/L 10 fug/L 10 fig/L 30 Mg/L 60 kg/L <br /> LCS Result 96 99 10 30 65 <br /> LCS %Recov .. 96 99 100 100 108 <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 /> I <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that 1s analyzed using the same reagents, <br /> A NALYTICAL 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 /> g enner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Reiative%Difference 9711E95 BLA <1> <br /> 6D <br />