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Sequoia680 Chesapeake Dnve 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 9& . <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento,CA 95834 (916) 921 960n FAX(916)921 0100 <br /> Blaine Tech Services, Iric Client Protect IQ Shell Tracy%970827-T2 <br /> },1680 Rogers Ave Matrix Liquid <br /> ,San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 970SF55-01 Reported Sep 17, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS090897MTBEF3A <br /> Analy Method EPA 8260 <br /> Prep Method N A. <br /> Analyst M Williams <br /> MS/MSD # 970902005 <br /> Sample Conc N D <br /> Prepared Date 9/8/97 <br /> Analyzed Date 9/8/97 <br /> Instrument I D.# F3 <br /> Conc. Spiked 50pg/L <br /> Result 46 <br /> MS % Recovery 92 <br /> i <br /> Dup Result 47 <br /> MSD % Recov.. 94 <br /> RPD: 22 <br /> RPD Limit- 0-25 <br /> LIDS # VDBO90897 <br /> Prepared Date 9/8/97 <br /> Analyzed Date 9/8/97 <br /> Instrument I.D.#. F3 <br /> Conc Spiked 50pg/L <br /> LCIS Result 48 <br /> LCS % Recov.: 96 <br /> 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 /> aeP <br /> N YTICAL 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 /> er **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> ger 9708F55 BLA <6> <br />