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CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 680 Chesapeake Drive Redwood City 988-9673 <br /> Sequoia 404 N Wiget lane Walnut Creek.CA 94598 (51988-9600 FAX(510) <br /> 922-9600 FAX(916)921-0100 <br /> 819 Straker Avenue Suite 8 Sacramento C.4 95834 (9156)(7 <br /> Stockton <br /> 792_1$65 FAX(707)792-0342 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 ( <br /> �III� ) <br /> �. V` rProject <br /> x Chevron 9-6171, Stockton J <br /> ,Gettler Ryan/Geostrategies' Client lPro ect ID CC <br /> X6747 Sierra Court, Ste J Matra gold <br /> ,Dublin, CA 94568 Reported Jun 4, 1998 <br /> %Attention Deanna Harding Work Order# 9805584-08 <br /> QUALITY CONTROL DATA REPORT <br /> FAnalAnalyte MTBE <br /> QC <br /> y <br /> Batch# MS051398MTBEF2A <br /> Method EPA 8260 <br /> ep Method N A. <br /> Analyst M Williams <br /> MS/MSD # 980556201 <br /> Sample Conc N D <br /> Prepared Date 5/13/98 <br /> Analyzed Date 5/13/98 <br /> instrument 1.13 # F2 <br /> Conc Spiked 50!19/L <br /> Result 51 <br /> GrS % Recovery 102 <br /> Dup Result 51 <br /> MSD %Recov 102 <br /> RPD 00 <br /> RPD Limit 0-25 <br /> r f . r f 4 i v 1 ♦ r r . r 1. f r <br /> LCS jE- LCS051498 <br /> Prepared Date 5/14/98 <br /> Analyzed Date 5/14/98 <br /> Instrument 1.1) # F2 <br /> Conc Spiked 50 ug/L <br /> LCS Result. 48 <br /> LCS %Recov.. 96 <br /> 50-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is an using the!procedure <br /> reagents, <br /> . SEQU NALYTICAL preparation,and analytical methods employed for the samples The matnx spike is an aliqsample <br /> fortified with known guantltie8 of specific compounds and subjected to the entire analyticaIfthe recovery of analytes from the matrix spike does not fall within specified control limits dmatrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> regory <br /> Project Manager **M5=Matrix Spike,MSD MS Duplicate, RPD=Relative%Difference 9805584 GET <2> <br />