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SJ� ,r y of a 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-923 <br /> eqi.1 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> r <br /> Analytical <br /> Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> [-nalytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232 9612 <br /> Blaine Tech Services, Inc Client Project ID Shell, 341 E Main St , Ripon <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose,-CA-95112 - - - - - - - - - - - <br /> Attention Fran Thie Work Order# 9902702-01 Reported Mar 2, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methyl t-Butyl Ether <br /> OC Batch# MS022499826052A <br /> Analy Method EPA 8260 <br /> Prep Method EPA 5030 <br /> Analyst N Nelson <br /> MS/MSD# 9021294 <br /> Sample Conc N D <br /> Prepared Date 2/24/99 <br /> Analyzed Date 2/24/99 <br /> Instrument I D # GCMS2 <br /> Conc Spiked 50lig/L <br /> Result 48 <br /> MS % Recovery 96 <br /> Dup Result 42 . <br /> MSD% Recov 84 <br /> RPD 13 <br /> RPD Limit 0-25 <br /> LCS# LCS022599 <br /> Prepared Date 2/25/99 <br /> Analyzed Date 2/25/99 <br /> Instrument I D # GcMs2 <br /> Conc Spiked 50,ug/L <br /> LCS Result 53 <br /> LCS % Recov 106 <br /> 60-140 <br /> - <br /> —LCS-- - 70-130 <br /> Control Limits <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS Is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap#1271 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 /> KlMya <br /> interference,the LCS recovery is to be used to validate the batch <br /> an <br /> ct Manag <br /> I�roleer **MS=Matrix Spike,MSD=MS Duplicate RPD=Relative% Difference 9902702 8LA <2> <br />