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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9]33 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)998 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (9161 921 0100 <br /> �,I,r <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-1848/971120-G3 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9711 G04-03 Reported Dec 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# M8120397MTBEF3A <br /> Analy Method EPA 8260 <br /> Prep Method N A <br /> Analyst R Yee <br /> MS/MSD # 971194204 <br /> Sample Conc 220 <br /> Prepared Date 12/3/97 <br /> Analyzed Date 12/3/97 <br /> Instrument I D # F3 <br /> Conc Spiked 500Ng/L <br /> Result 720 <br /> MS % Recovery 100 <br /> Dup Result 730 <br /> MSD % Recov 102 <br /> RPD 14 <br /> RPO Limit 025 <br /> LCS # LCS120397 <br /> Prepared Date 12/3/97 <br /> Analyzed Date- 12/3/97 <br /> Instrument I D #. F3 <br /> Conc Spiked 50Ng/L <br /> LCS Result 51 <br /> LCS% Recov 102 <br /> Wmw 60-140 <br /> LCS 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 /> ENALYTICAL 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 ff <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 /> Peggy Penner <br /> Project Manag r **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9711G04 BLA <3> <br />