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Sequoia 680 Chesapeake a Redwood Cityeek A 4598 (650) 364 9600 FAX(550)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 99598 (510) 988 9600 FAX (510) 9$8 9673 <br /> � Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 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 Lead <br /> OC Batch# ME1204977000MDA <br /> Analy Method EPA 239 2 <br /> Prep Method EPA 3020 <br /> Analyst J Jencks <br /> MS/MSD # 9711CI601 <br /> Sample Cone N D <br /> Prepared Date 12/4/97 <br /> Analyzed Date 12/5/97 <br /> Instrument I D # MTJA3 <br /> Cone Spiked 50pg/L <br /> Result 3s <br />• MS % Recovery 76 <br /> yup Result 40 <br /> MSD %Recov so <br /> RPD 51 <br /> RPD Limit 0-20 <br /> LCS # BLK120497 <br /> Prepared Date 12/4/97 <br /> Analyzed Date 12/5/97 <br /> Instrument I D # MTJA3 <br /> Cone Spiked 50ug/L <br /> LCS Result 49 <br /> LCS % Recov 98 <br /> 75 125 <br /> LCS 80-120 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,tnterferent4res matrix that is analyzed using the same reagents, <br /> SEQUOIA AAAKIALYTICAL 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 /> tnterierence,the LCS recovery is to be used to validate the batch <br /> Peggy Penner <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9711F41 BLA <1> <br />