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Sequoia 680 Chesapeake Dnve Redwood C-ty,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 4. 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Iwo- Analytical 819 Sinker Avenue,Suitc 8 Sacramento CA 95834 (916) 921 9600 FAX (9t6) 921 0100 <br /> Blame Tech Services, Inc Client Project ID Chevron 9-2033 /970519-1-12 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 97051357-01 Reported Jun 4, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Dieser <br /> QC Batch# GC05M970HBPEXA <br /> Analy. Method EPA 8015M <br /> Prep Method EPA 3510 <br /> Analyst B Sullivan <br /> MS/MSD#- BLK052297 <br /> Sample Conc N D <br /> Prepared Date 5/22/97 <br /> Analyzed Date 5/23/97 <br /> Instrument 1 D # GCHP4 <br /> Conc. Spiked 10001ig/L <br /> Result 870 <br /> 0 M % Recovery 87 <br /> Dup Result 810 <br /> MSD% Recov 81 <br /> RPD 71 <br /> RPD Limit 0-50 <br /> LCS# BLK052397 <br /> Prepared Date 5/23/97 <br /> Analyzed Date 5/27/97 <br /> Instrument l D #. GCHP4 <br /> Cone Spiked. 10001rg/L <br /> LCS Result 780 <br /> LCS % Recov 78 <br /> 50-150 <br /> LCS 60-140 <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 /> OIA 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 /> eg enner <br /> o ct Manager *"MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 97051357 BLA <5> <br />