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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> ID 404 N W4et lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> IDAnalytical 819 Sinker Avenue,Suite 8 Sacramento C4 95834 (916) 921 %00 FAX (916)921-0100 <br /> . v <br /> Blaine{Tech Services, Inc n Client Project ID Shell Stockton j 971117-M1 v <br /> 1680 Rogers Ave Matrix Liquid <br /> ,,San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 F35-04 Reported Dec 1Bµ 1997. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC120297BTEX21A GC120297BTEX21A GC120297ETEX21A GC120297STEX21A GC120297BTEX21A <br /> Analy. 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 A.Miraftab A. Miraftab A. Miraftab <br /> M S/MSD# 9711A7704 9711A7704 9711 AT704 9711A7704 9711A7704 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date* 12/2/97 12/2/97 12/2/97 12/2197 12/2/97 <br /> Analyzed Date 12/2/97 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10 pg/L 10 pg/L 10 pg/L 30 pg/L 60 pg/L <br /> Result 11 11 11 32 64 <br /> MS % Recovery 110 110 110 107 107 <br /> Dup Result 11 11 12 33 66 <br /> MSD %Recov 110 110 120 110 110 <br /> RPD 00 00 87 31 31 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK120297 BLK120297 BLK120297 BLK120297 BLK120297 <br /> Prepared Date 12/2/97 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Analyzed Date 12/2/97 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked 10pg/L lopg/L 10pg/L 30,ug/L 60,ug/L <br /> LCS Result 10 10 10 30 59 <br /> LCS % Recov 100 100 100 100 98 <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 /> 7KT <br /> OL 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 H <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 /> *",MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9711F35 BLA <2> <br /> t� - <br />