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Sequoia680 Chesapeake Drive Redwood C" CA 94063 (650) 364 9600 FAX(659)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenge,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 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> QC Batch# MS0213988270EXA MS0213988270EXA MS0213988270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 <br /> Analyst E Manuel E Manuel E Manuel <br /> MS/MSD # 980271301 980271301 980271301 <br /> Sample Conc N D N D N D <br /> Prepared Date 2/13/98 2/13/98 2/13/98 <br /> Analyzed Date 2/17/98 2/17/98 2/17/98 <br /> Instrument I D # F4 F4 F4 <br /> Conc Spiked 20oug/L 200pg/L 200 pg/L <br /> Result 160 150 113 <br /> MS % Recovery 80 75 67 <br /> Dup. Result 150 154 113 <br /> MSD % Recov 75 77 57 <br /> RPD 65 26 00 <br /> RPD Limit 030 0-30 0-30 <br /> LCS # LCS021898 LCS021898 LCS021898 <br /> Prepared Date 2/18/98 2/18/98 2/18/98 <br /> Analyzed Date 2/18/98 2/18/96 2/18/98 <br /> Instrument I D # H5 H5 H5 <br /> Conc Spiked 200 ug/L 200 ug/L 200 jig/L <br /> LCS Result 146 161 159 <br /> LCS % Recov 73 81 80 <br /> LCS <br /> Control Limits 24-96 9-103 26 127 <br /> Please Note <br /> The LCS is a control sample of known, interferent-free matrix that is analyzed using the same reagents <br /> 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 /> !PeVgnn **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference <br /> Prager Page 3 of 3 9802909 BLA <7> <br />