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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 Sucker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> Blaine 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 Thie Work Order# 9808910 -01 Reported Aug 31, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,2 4-Tnchloro 4-Chloro-3 Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch# MS0817988270EXA MS0817988270EXA MS0817988270EXA MS0817988270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst E Manuel E Manuel E Manuel E Manuel <br /> BS/BSD # BLK081798 BLK081798 BLK081798 61-KO81798 <br /> Sample Conc ND N D N D N D <br /> Prepared Date 8/17/98 8/17/98 8/17/98 8/17/98 <br /> Analyzed Date 8/17/98 8/17/98 8/17/98 8/17/98 <br /> Instrument I D # F4 F4 F4 F4 <br /> Cone Spiked 100 wg/L 100 ug/L 100 ug/L 100 jig/L <br /> Result 73 67 74 58 <br /> BS % Recovery 73 67 74 58 <br /> Dup Result 78 76 76 62 <br /> BSD % Recov 78 76 76 62 <br /> RPD 66 13 27 67 <br /> RPD Limit 0-30 030 0-30 0-30 <br /> LCS # <br /> Prepared Date <br /> Analyzed Date <br /> Instrument I D # <br /> Cone Spiked <br /> LCS Result <br /> LCS % Recov <br /> LCS <br /> Control Limits 39-98 23-97 46-118 10-80 <br /> Please Note <br /> The LCS 1s a control sample of known interferent-free matrix that 1s analyzed using the same reagents <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> i! 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 /> oiy **MS=Matrix Spike MSD=M5 Duplicate, RPD=Relative% Difference <br /> !f anager Page 2 of 3 9808910 SLA <br /> 4� <br />