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Sequoia 680 Chesapeake Dnve Redwood Gry CA 94063 (415) 364 9600 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 0100 <br /> qQrr <br /> Blaine Tech Services, Inc Client Project ID ' Shell Stockton /970131-Z1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9701115 11-12 Reported Feb 13, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO20597BTEX178 GCO2059713TEX178 GCO20597BTEX17B GCO20597BTEX17B <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Heider J Heider J Heider J Heider <br /> MS/MSD# 9701G1304 9701G1304 9701GI304 9701131304 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 2/7/97 2/7/97 2/7/97 2/7/97 <br /> Analyzed Date 2/7/97 2/7/97 2/7/97 2/7/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10)ug/L 10 pg/L 10 lig/L 30)ig/L <br /> Result 97 97 97 30 <br /> MS % Recovery 97 97 97 100 <br /> 40 Dup Result 91 92 93 28 <br /> NiSD %Aecov. 91 92 93 93 <br /> RPD 64 53 42 69 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS #. BLK020897A BLK020897A BLK020897A BLK020897A <br /> Prepared Date 2/7/97 2/7/97 2/7/97 2/7/97 <br /> Analyzed Date 2/7/97 2/7/97 2/7/97 2/7/97 <br /> Instrument I D.# GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked 10 pg/L 10 erg/L 10 ug/L 30 yg/L <br /> LCS Result 95 96 97 30 <br /> LCS %Recov.. 95 96 97 100 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 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 /> �5 U I 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 /> Pegg Pen <br /> Proj t Manager '""`MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9702115 SLA <5> <br />