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Sequoia 6$0 Chesapeake Redwood City (650) 364-9600 FAX(650) 364-9x33 <br /> 404 N Wiget Lanea Walnut Creek CAA 9459$4598 (925)988-9600 FAX(925)988-9673 <br /> - Analytical 819 Striker Avenue Suite B Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> frit <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9807H89-20 Reported Aug 20, 1998 <br /> QUALITY-CONTROL-DATA-REP-ORT <br /> Analyte MTBE <br /> QC Batch# MS080698MTBEHSB <br /> Analy. Method EPA 8260 <br /> Prep Method NA <br /> Analyst L Duong <br /> MS/MSD # 98o7Ha92o <br /> Sample Conc N D <br /> Prepared Date 8/6/98 <br /> Analyzed Date 8/6/98 <br /> Instrument LD # H5 <br /> Conc Spiked- 50pg/L <br /> Result- 45 <br /> MS % Recovery so <br /> Dup. Result. 46 <br /> MSD % Recov .. 92 <br /> RPD 22 <br /> RPD Limit: 0-25 <br /> -.-.M1M1 ,. '. . .v♦ Y t'.t N. a vx v, v wv vn n n vn»^'T K n'W'c'»'.ac,cxxo+x�^+^•+^+.y�:+-+Mmw++rv•Av -+`n n,,....,,.«....A�,...,.. . .,..,...,. . . ..N....'..r x w nTix. c: <br /> LCS #' LCS080698 <br /> Prepared Date 8/6/98 <br /> Analyzed Date 8/6/98 <br /> Instrument I D.# H6 <br /> Conc. Spiked 50ug/L <br /> LCS Result 52 <br /> LCS % Recov 104 <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 /> ALYTICAL 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 /> P gg ner <br /> P t Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9807H87 BLA <B> <br />