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68OLapeake Drive Redwood City CA 940 (650) 364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707) 79Z-0342 nalytical <br /> 06laine Tech Services"Inc Client P'rolect ID Shell 341 Past Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9810730 -01 Reported Oct 22, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> QC Batch#- MS101498MTBEH6B <br /> Analy. Method EPA 8260 <br /> Prep. Method N A. <br /> Analyst B Pitamah <br /> MS/MSD# 981073705 <br /> Sample Cone : 36 <br /> Prepared Date: 10/14/98 <br /> Analyzed Date. 10/14/98 <br /> Instrument I.D# H6 <br /> Cone Spiked 50 ug/L <br /> Result: 77 <br /> MS % Recovery' 82 <br /> Dup Result 7o <br /> MSD%Recov 68 <br /> RPD 95 <br /> RPD Limit. 0-25 <br /> LCS#' LCS101498 <br /> Prepared Date 10/14/98 <br /> Analyzed Date 10/14/98 <br /> Instrument LD #: H6 <br /> Cone.Spiked: 50ug/L <br /> LCS Result: 44 <br /> LCS %Recov.. 88 <br /> 60-940 <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 same reagents, <br /> EQ 0 A NALYTiCAL 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 /> eggyj enner <br /> O[ ]ect Manager MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9810730 BLA <1> <br />