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Y Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 354 9600 FAX(650)364 9233 <br /> 404 N Wiaet 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)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264/980609-J1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order # 9806003-01 Reported Jun 25, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Total Recoverable <br /> Petroleum Hydrocarbons <br /> GC Batch# SP0615985520EX13 <br /> Analy Method SM 5520BF <br /> Prep Method SM 55208F <br /> Analyst H Olonan <br /> MS/MSD # BLK061598 <br /> Sample Conc N D <br /> Prepared Date 6/15/98 <br /> Analyzed Date 6/17/98 <br /> Instrument I ❑ # MANUAL <br /> Conc Spiked 10 mg/L <br /> Result 92 <br /> MS % Recovery 92 <br /> Dup Result 92 <br /> MSD % Recov 92 <br /> RPD 00 <br /> RPD Limit 0-30 <br /> LCS # BLK061698 <br /> Prepared Date 6/16/98 <br /> Analyzed Date 6/17/98 <br /> Instrument 1 D # MANUAL <br /> Conc Spiked 10 mg/L <br /> LCS Result 98 <br /> LCS % Recov 98 <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 1s analyzed using the same reagents, <br /> �SEQU ALYTICAL 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 /> regory <br /> Project Manager **M8=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9806003 BLA <5> <br />