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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> u <br /> 45) <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-8100 <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 9-2033/ 981109-T2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order# 9811696-01 Reported Dec 1, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,2,4-Tnchloro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenof <br /> QC Batch# MS1112988270EXA MS1112988270EXA MS1112988270EXA MS1112988270EXA <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 /> MS/MSD # 981166301 981166301 981166301 981166301 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 11/12/98 11/12/98 11/12/98 11/12/98 <br /> Analyzed Date 11/13/98 11/13/98 11/13/98 11/13/98 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 200 fig/L 200 fig/L 200 pg/L 200 fig/L <br /> Result 176 159 154 106 <br /> MS % Recovery 88 80 77 53 <br /> Dup Result 179 139 147 80 <br /> MSD % Recov 90 70 74 40 <br /> RPD 17 13 47 28 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS # LCS111298 LCS111298 LCS 111298 LC8111298 <br /> Prepared Date 11/12/98 11/12/98 11/12/98 11/12/98 <br /> Analyzed Date 11/13/98 11/13/98 11/13/98 11/13/98 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 200 pg/L 200 fig/L 200pg/L 200 jig/L <br /> LCS Result 129 - 130 123 97 <br /> LCS % Recov 65 65 62 49 <br /> LCS <br /> Control Limits 39-98 23-97 46-118 10-80 <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 /> ry **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> ! ro Manager Page 2 of 3 9811696 BLA <7> <br />