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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921,0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)x`792-0341 <br /> Blaine Tech Services, Inc Client Project ID Shell 6131 Pacific Ave <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9805F44 -01-03 Reported Jun 11, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> _QC Batch# MS052898MTBEH6A_ - - - _ <br /> Analy Method EPA 8260 <br /> Prep Method N A. <br /> Analyst E Manuel <br /> MS/MSD # 980592814 <br /> Sample Conc 16 <br /> Prepared Date N A. <br /> Analyzed Date 5/28/98 <br /> Instrument I D # H6 <br /> Conc Spiked 50ug/L <br /> Result 69 <br /> MS % Recovery 106 <br /> Dup Result 68 <br /> MSD % Recov 104 <br /> RPD 15 <br /> RPD Limit 0-25 <br /> LCS # LCS052898 —- -- — - ---------— —- - -— ---- <br /> Prepared Date NA <br /> Analyzed Date 5/28/98 <br /> Instrument I D # H6 <br /> Conc. Spiked 50pg/L <br /> LCS Result. 53 <br /> LCS % Recov 106 <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 /> 7,1,ANALYITICAL <br /> 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 matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Penner <br /> t M nager r*hAC-KAatnv enirw AACr1=SAC niinlinntn RRr'1=Ralatnra 4C,M14jarpm, OFZnr,Fdd RI C e Z� <br /> ...1. ... hA, ...y. 1' -r ---r -- - - - - - - - - -- -� -- <br />