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' Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 484 N lgct Imine Walnut Creek CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Stnkcr Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(9t6)921-OIW <br /> x3&k r Ryjan/Geostrati les Client Profeci <br /> ID A lno <br /> CaI'SS#5886 <br /> (6747 Sierra Court, Ste J Matrix Liquid <br /> 'Dublin, CA 94568 i <br /> Attention Deanna Harding Work Order# 9803G82-09, 10 <br /> Reported Alar 15, 1998 Y <br /> xai+vFO rC `} v w ♦ v n r . ~}4`r mv.}xrn mv+.� dr r��ii4'.:rn+�r }.titin vmnr♦w s.vrnYt 4rmvr,.w v Jvv d3x.. }ry }nvr • r nµ44 r i v`i5 XS r y <br /> Y.rV• ti4r W: <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch# M$033198MTBEF3A <br /> Analy Method EPA 8260 <br /> Prep Method N A, <br /> Analyst E Manuel <br /> MS/MSD # 9803HO602 <br /> Sample Conc - 39 <br /> Prepared Date - <br /> Analyzed Date 3/31/98 <br /> Instrument I D # F3 <br /> Conc Spiked 50ug/L <br /> Result 56 <br /> MS % Recovery 104 <br /> Dup Result 56 <br /> SD % Recov 104 <br /> RPD 00 <br /> RPD Limit 0.25 <br /> LCS # LCSO40198 <br /> Prepared Date 4/1/98 <br /> Analyzed Date 4/1/98 <br /> Instrument I D # F3 <br /> Conc Spiked 50yg/L <br /> LCS Result 52 <br /> LCS % Recov. 104 <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Pfeasa Note <br /> The LCS is a control sample of known,interferent-tree matrix that is analyzed using the same reagents, <br /> S�UOIA AN LYTICAL preparation,and analytical methods employed for the samples The matnx 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 /> regary interference,the LCS recovery Is to be used to validate the batch <br /> r sect Manager "'MS-Matrix Spike,MSD-MS Duplicate,RPD-Relative% Difference <br /> 9803G82 DEI' <6> <br />