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- Se(] ity,Sequoia 680 Chesapeake Dnve Redwood CCA 94063 (650) 364-9600 FAX(650)364.9233 <br /> 1404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988.9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> � +•'.vry{v vx}i'Or ^� 'V✓4+4 4nY -� r >rJ r' rrn'^ h xSi.' 'Cnl}r+m vnry rrv{vrJ» `+.9. ♦+ s wrn�av+.3r } nvnhr s��ary .v"� <br /> ,bettler Fiyan/Geostrategies' ClienfOrolec`t ID Unocal SS#4 5886n w {Y <br /> 6747 Sierra Court, Ste J Matra Liquid ; <br /> <Dublin, CA 94568 >f <br /> 'Attention Deanna Harding Work Order# 9603G82-05 Reported Apr 15, 1998 <br /> w <br /> x.4nvm-y'++r'+m n vv�nv rr rrr riR xb4ir rr r r r v r 4r xtitir rr r r r ren nv irvN rs s r v ' rr r [rn} ' . ^ vv n..2�A rn r <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch#- MS033098MTBEF3A <br /> Analy. Method EPA8260 <br /> Prep Method N a <br /> Analyst E Manuel <br /> MS/MSD # 9803G4301 <br /> Sample Conc 48 <br /> Prepared Date - <br /> Analyzed Date 3/30/98 <br /> Instrument I D-# F3 <br /> Conc Spiked 50pg/L <br /> Result 56 <br /> MS % Recovery 102 <br /> 0 Dup Result 67 <br /> MSD % Recov 124 <br /> RPD 18 <br /> RPD Limit 0-25 <br /> LCS # LCS033198 <br /> Prepared Date - <br /> Analyzed Date 3/31/98 <br /> Instrument I D.# F3 <br /> Conc Spiked 50ug/L <br /> LCS Result: 55 <br /> LCS % Recov 110 <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-fres matrix that is analyzed using the same reagents, <br /> VrcotMganageLry <br /> TICAL 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 /> ""MS=Matrix Spike,MSD-MS Duplicate,RPD=Relative%Difference 9803G82 GET <4> <br />