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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX (5 0)98819673 <br /> Analytical <br /> B 19 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 iL <br /> � <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /970716-S1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> 4 Attention Fran Thle Work Order# 9707820-01 Reported Jul 24, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> OC Batch# MS072197MTBEH6A <br /> Analy. Method EPA 8260 <br /> Prep Method NA <br /> Analyst M Williams <br /> MS/MSD # 970782002 <br /> Sample Cone N D <br /> Prepared Date 7/21/97 <br /> Analyzed Date 7/21/97 <br /> Instrument LD # H6 <br /> Conc. Spiked 50lig/L <br /> Result 51 <br /> MS % Recovery 102 <br /> Dup Result 49 . <br /> MSD % Recov 98 <br /> RPD 40 <br /> RPD Limit: 0-25 <br /> ry rvrvry—M v} rvv, rr r Hv mv.rmxv r.:.y.•rn nJCr4vJ.,kvYiMv 4vt'{S{O.NxvryX-0x?hY 0.hlv}r4%+Y VMFF'OC?.."tF.4J'fFrA "e�.1+5�a?.GJGJ9hS0.JOt^".v,LW}YKuW+ilOtU}YJ trY.K4S{O"WlYOV+]P)L xv0.3t0W.tl` <br /> LCS # VMB072197 <br /> Prepared Date 7/21/97 <br /> Analyzed Date 7/21/97 <br /> Instrument I.D # H6 <br /> Cone Spiked 50Ng/L <br /> LCS Result 49 <br /> LCS % Recov.. 98 <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-fres matrix that is analyzed using the same reagents, <br /> SE 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 <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to mat <br /> interference,the LCS recovery is to be used to validate the batch <br /> P g Penner <br /> P i et Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9707820 BLA <3> <br />