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Sequoia -Qot"d! O+VQ R4- vdod City CA 940" (550)36a-9600 FAX(650) 364 9233 <br /> 4D40. <br /> Alar Lwe Walnut Creek CA 9455 (925)988 9600 FAX(925)988 %73 <br /> Analytical 819 SaBcer Avenue Suites sacramencc CA 95834 (916)921 9600 FAX(916)921-0100 <br /> 1451 AtcDoweu Btvd !<ior Ste_D PeWum-L CA 94954 (707)792 1855 FAX(707) 792-0342 <br /> ii, <br /> ,illikettler Ryan/Gexistrategies Chem Project lD a.588fi/18137{85, 2701 iN 'March ; <br /> Ru47 Sierra Court, Ste J Matrix Liquid <br /> blln, CA 94568 <br /> Attention Deanna Harding Work Order # 9812342 02-09 Reported Dec 22, 1998 { <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> OC Batch# MS11208M8MT8EH6A <br /> Analy Method EPA 8260 <br /> Prep Method <br /> Analyst L Duong <br /> MS/MSD#. sai234202 <br /> Sample Cane Ito <br /> Prepared Date, 112/8/98 <br /> Analyzed Date 112/8/98 <br /> Instrument I D # H6 <br /> Cone. Spiked 50ug/L <br /> Result 160 <br /> MS % Recovery 1100 <br /> Dup Result ISO <br /> MSD % Recov .. 1100 <br /> RPD, 00 <br /> RPD Limit: 0-25 <br /> LCS #. LCS 120898 <br /> Prepared Date 112/8/98 <br /> Analyzed Date 112/8/98 <br /> Instrument I D # H6 <br /> Cone. Spiked 50us/L <br /> LCS Result 43 <br /> LCS °6 Recov 86 <br /> + / 60-1.110 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS;s a control sample of known,interferent free matrix that is a ia!fzed using the same reagents, <br /> S U IA NALYTICAL preparation,and anwyucal methods employed for the samples The mayut spike is an alcquot of sample <br /> fortified with known quantities of specrfjc compounds and subjected to tie entire arlaiytfcai procedure if <br /> the recovery of anslytes from the matrix spike does not fall within spoofed control limit due to matrix <br /> interference,the LCS recovery Is to be used to validate the batch <br /> od ra ,cher <br /> Ci11a"ager *+MS•4tatrix Splkc,MSO,MS Dupllcats,RPD-Relative%Qlftetenca 96112342CE-T <4> <br /> Sr, <br />