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41) Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> 404 N Wiget Lane Walnut Creek, CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 92f 0100 <br /> k;Gettler Ryan/Geostrategies Cli6nt Project ID Chevron 9-rt8,48, Manteca' { <br /> ,'3184 Gold Camp Drive, #240 Matrix Solid <br /> 4 Rancho Cordova, CA 95670 n <br /> t'Attentlon Greg Gurss Work Order# 9708G33-01-08 Reported Sep 11, 199T., <br /> Y}f i`tiy S4r +` ♦++n , r v.yry»n yr 4 v 4 h r f+ v r. i s <br /> � Lv wN n f v r fv♦ > > <br /> ' O i, h"� f +Y.t 4� aL f ry ' '. • Y v + v <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> OC Batch#- MS0903978260EXA <br /> Analy Method. EPA 8260 <br /> Prep Method N k <br /> Analyst L Duong <br /> MS/MSD# 9708C16ot <br /> Sample Conc - N D <br /> Prepared Date. 9/3/97 <br /> Analyzed Date 9/4/97 <br /> Instrument I D #- F3 <br /> Conc Spiked. 2500ug/Kg <br /> Result: 2800 <br /> �MS %Recovery 112 <br /> Dup Result 2900 <br /> MSD % Recov : 116 <br /> RPD: 35 <br /> RPD Limit 0-25 <br /> 9w«ya Dairy ,. 4 t r <br /> c <br /> LCS #- BLK090597 <br /> Analyst- L Zhu <br /> Prepared Date- 9/5/97 <br /> Analyzed Date 9/7/97 <br /> Instrument LD #: a=3 <br /> Conc Spiked. 2500ug/Kg <br /> LCS Result 2300 <br /> LCS %Recov • 92 <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 s7ageAFECUOIA ALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliqfortified with known quantities of specific compounds and subjected to the entire analytical the recovery of analytes from the matrix spike does not fall within specified control limits du <br /> interference,the LCS recovery is to be used to validate the batch <br /> regory **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 9708G33 GET :3> <br />