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680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988 %00 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)9Z1 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707)79Z-034Z <br /> Blame Tech Services, Inc Client Project ID Chevron 9-8264/ 980810-T1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Th1e Work Order # 9808910 -01 Reported Aug 31, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 2,4-Dlnitro Pentachloro- Pyrene <br /> toluene phenoi <br /> QC Batch# MS0817988270EXA MS0817988270EXA MS0817988270EXA <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 /> BS/BSD # BLK081798 BLK081798 BLK081798 <br /> Sample Cone N D N D NO <br /> Prepared Date 8/17/98 8/17/98 8/17/98 <br /> Analyzed Date 8/17/98 8/17/98 8/17/98 <br /> Instrument I D # F4 F4 F4 <br /> Cone Spiked 1o0ug/L 1DDjig/L 100 Ng/L <br /> Result 61 70 67 <br /> BS % Recovery 61 70 67 <br /> Dup Result 54 80 73 <br /> BSD % Recon 64 80 73 <br /> RPD 48 13 86 <br /> RPD Limit 0-30 0-30 0-30 <br /> LCS # <br /> Prepared Date <br /> Analyzed Date <br /> Instrument I D # <br /> Cone Spiked <br /> LCS Result <br /> LCS % Recon <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 /> 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 I <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 /> gory **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference <br /> rpj Manager Page 3 of 3 9808910 BLA <3> <br />