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' Sequoia680 Chesapeake Dnve Redwood GM CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget 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 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802909-01 Reported Feb 27, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Total Recoverable <br /> Petroleum Hydrocarbons <br /> QC Batch# SP021898552000A <br /> Analy Method SM 552OBF <br /> Prep Method SM 55208F <br /> Analyst P Cheung <br /> BS/BSD# BLK021898 <br /> Sample Conc N D <br /> Prepared Date 2/18/98 <br /> Analyzed Date 2/19/98 <br /> Instrument I D # MANUAL <br /> Conc Spiked 10 mg/L <br /> Result 94 <br /> BS % Recovery 94 <br /> Dula Result 75 <br /> BSD % Recov 75 <br /> RPD 22 <br /> RPD Limit 0-30 <br /> LCS # LCS022098 <br /> Prepared Date 2/20/98 <br /> Analyzed Date 2/23/98 <br /> Instrument I D # MANUAL <br /> Conc Spiked 10 mg/L <br /> LCS Result 83 <br /> LCS % Recov 83 <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 is analyzed using the same reagents, <br /> $egg <br /> 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 /> enner <br /> anager **MS=Matrix Spike, MSD=MS Duplicate RPD=Relative% Difference 9802909 BLA <2> <br />