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SIERRA LABORATORMS TNC <br /> Emcon-Pinnacle „ Date Sampled: 6/28199 <br /> in ridge Road., <br /> 220 Date Received: 711199. , <br /> -Caiety Park;Chi 95682' Date Prepared: 7.12199 <br /> :. <br /> .. :.. .Date AnakVzed: 712199'. <br /> Sierra Project,No NO.: 9907-003 Analyst: WH' <br /> Client Project ID; UTSA Station 465,:Lnot C <br /> 20A41-008.001 <br /> Sginple nutria; 171rater . Report Tate: 7/8/99 <br /> Oxygenate-,(GC/MS) <br /> EPA METHOD 8260 <br /> Concentration,u <br /> .. <br /> Method <br /> ChOi Sam lee No.: MW-5 MW-6 N4AV-7 M),V-8 Detection <br /> i uuif,. <br /> Sierra Sam.` le:No, 010 Oil 012 013 tj <br /> FA <br /> COMPOUNDS:. <br /> MTBE ND 0.82 ND 460 0.5 . : <br /> ETfM ND ND ND ND 5.0 <br /> ND ND ND ND 50 <br /> DISE ND ND ND ND 5.0 <br /> TAME ND ND ND ND 5:0 <br /> TBA` ND ND ND 77 5,0: <br /> . DilutiUII Factor .: 1 1 i 1000 QC Limits <br /> %Surrogate Reeo�eries'.. <br /> Dibromoflauromethane : 118 117 118 120 <br /> L74-1 <br /> 93 95 94 9; 7 <br /> 106 106 105 107 1. <br /> -Quality Assurance/Quality Control<Data <br /> QCSam :1.e.ID 9906.3.2.342$33 <br /> Spike Spike Dup QC QC <br /> Compounds LCS % Rec. % Rec. Limits RPD Limits <br /> MTBE 86 92 98 37-160 6.3 0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)=Method Detection Limit(IvIDL)x Dilution Factor <br /> • <br />