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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> (D 404 N W,get Lane Wainut 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 9-8632 /980212-C1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802902 -05 Reported Mar 5, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Total Recoverable <br /> Petroleum Hydrocarbons <br /> QC Batch# SP021898552000A <br /> Analy Method SM 5520BF <br /> Prep Method SM 552OBF <br /> Analyst P Cheung <br /> BS/BSD# BLK021898 <br /> Sample Conc N o <br /> Prepared Date 2/18/98 <br /> Analyzed Date 2/19/98 <br /> Instrument I D # MANUAL <br /> Conc Spiked 10 mg/i_ <br /> Result 94 <br /> BS % Recovery 94 <br /> is Dup 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 /> SEQUOIA ANALYTICAL 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 fail within specified control limits due to matrix <br /> 4* interference,the LCS recovery is to be used to validate the batch <br /> eggy Penner <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference 9802902 BLA <1> <br />