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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> �III� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-2033 /971117-M2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 C66-01 Reported Dec 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br /> QC Batch# GC1124970HBPEXZ <br /> Analy Method EPA 8015M <br /> Prep Method EPA 3520 <br /> Analyst A Porter <br /> MS/MSD # 9711D1601 S131 <br /> Sample Cone ND <br /> Prepared Date 11/24/97 <br /> Analyzed Date 12/2/97 <br /> Instrument I D # GCHP4 <br /> Cone Spiked 1000Ng/L <br /> Result 720 <br /> . MS % Recovery 72 II <br /> Dup Result 760 <br /> MSD % Recov 76 <br /> RPD 54 <br /> RPD Limit 0-50 <br /> LCS # BLK112497 <br /> Prepared Date 11/24/97 <br /> Analyzed Date 12/1/97 <br /> Instrument I D # GCHPS <br /> Cone Spiked 1000Ng/L <br /> LCS Result 1100 <br /> LCS %Recov 110 <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 /> SE 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 N <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 /> Pe Penner <br /> Proj t Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9711066 BLA <5> <br />