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„ u <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project 0 Chevron 9-8632/980610-1-1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9806741 -01-06 Reported Jun 30, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# 06V8241 06V8241 06V8241 06VB241 <br /> Analy Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 8015M EPA 8015M EPA 6015M EPA 8015M <br /> Analyst L Hall L Hail L Hail L Hail <br /> LCS/LCSD#- LCS061598 LCS061598 LCS051598 LCS061598 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 6/15/98 6/15/98 6/15/98 6/15/98 <br /> Analyzed Date. 6/15/98 6/15/98 6/15/98 6/15/98 <br /> Instrument I D #* - <br /> Conc Spiked 20pg/L 20pg/L 20Pg/L 20pg/L <br /> Result 22 22 22 22 <br /> LCS % Recovery 110 110 110 110 <br /> Dup Result 22 22 23 23 <br /> LCSD % Recov 110 110 120 120 <br /> RPD 00 00 44 44 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS 80-120 80-120 80-120 80-120 <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 /> VrojecManager <br /> 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 /> **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9806741 BLA <1> <br /> loci, <br />