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Sequoia 680 Chesapeake Drive Redwood C+ry CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 998 9673 <br /> enue,Suite 8 Sacramento,CA 95834 (9!6) 921 9600 FAX(916)921 0100 <br /> Analytical 819 Straker Av <br /> - Blaine Tech Services, Inc Client Project ID' Shell Stockton /980112-1-12 <br /> ,1680 Rogers Ave Matrix Liquid <br /> vSan Jose, CA 95112 Reported Jan 3Q, 1998 <br /> } Attention Fran Thie Work Order# 9801694-01, 03-07, <br /> „� <s <br /> 9801695-11, 13 <br /> OUALITV CONTROL DATA REPORT <br /> Analyte. Benzene <br /> Toluene Ethyl Xylenes Gas <br /> Benzene <br /> ®C Batch# GC012798BTEX07A GC012798BTEX07A GC012798BTD(07A GCO127986TEX07A GC012798BTIX07A <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' J Minkel J Minkel J Minkel <br /> J Minkel J Minkel <br /> MS MSD #- 980184402 980184402 980184402 98018 02 9801844402 <br /> Sample Conc.: N D N D N D <br /> Prepared Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Analyzed Date' 1/27/98 1/27/98 1/27/98 GCHP7 <br /> GCHP7 GCHP7 GC1-[P7 <br /> Instrument 1.13 # GCHP7 GCHP7 GCHP7 3011g/L 60pg/L <br /> Conc.Spiked 10Ng/L 10pg/L 10pg/L <br /> Result- 93 93 95 29 55 <br /> MS %Recovery. 93 93 95 97 92 <br /> • Dup Result' 96 95 98 30 57 <br /> MSD % Recov : 96 95 98 100 95 <br /> RPD' 32 21 31 34 36 <br /> RPD Limit. 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK012798 BLK012798 BLK012798 BLK012798 BLK012798 <br /> Prepared Date: 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Analyzed Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Instrument I.D.# GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc Spiked- 10Ng/L 10Ng/L 10Ng/L 30pg/L 60)tg/L <br /> LCS Result 11 12 12 36 68 <br /> LCS %Recov : 110 120 120 120 113 <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 /> A NALVTICAL 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 fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> 4gy enner Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9801694 BLA <3� <br />