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t r� Sequoia 680 Chesapeake Drive Redwood City 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 /> tiill>� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9t6) 921 9600 FAX (916} 971 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264 /971124-S1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 F41-01 Reported Dec 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Total Recoverable <br /> Petroleum Hydrocarbons <br /> QC Batch# IN120397552000A <br /> Analy Method SM 5520BF <br /> Prep Method N A <br /> Analyst P Cheung <br /> MS/MSD # BLK120397 <br /> Sample Cone N D <br /> Prepared Date 12/3/97 <br /> Analyzed Date 12/4/97 <br /> Instrument I D # MANUAL <br /> Cone Spiked 10 mg/L <br /> Result 84 <br /> BS % Recovery 84 <br />• pup Result 81 <br /> BSD % Recov 81 <br /> RPD 36 <br /> RPD Limit G-30 <br /> LCS # LCS120397 <br /> Prepared Date 12/3/97 <br /> Analyzed Date 12/4/97 <br /> Instrument I D # MANUAL <br /> Cone Spiked 10 mg/L <br /> LCS Result 84 <br /> LCS % Recov 84 <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 fall within specified control limits due to matrix <br /> �— interference,the LCS recovery is to be used to validate the batch <br /> Peggy Penner <br /> Project Manage *'MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9711F41 BLA a2> <br />