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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 1 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> �Ilt� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-6171/981223-1-2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order# 9812F88-01, 02 Reported Jan 14, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> QC Batch# MS1229988270EXB M81229988270EXB MS1229988270EXB <br /> Anally Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitamah 6 Pitamah <br /> MS/MSD # 9812F8802 9812F8802 9812F8802 <br /> Sample Conc ND N D N D <br /> Prepared Date 12/29/98 12/29/98 12/29/98 <br /> Analyzed Date 12/30/98 12/30/98 12/30/98 <br /> Instrument I D # F4 F4 F4 <br /> Conc Spiked 200u9/1- 200ug/L 200ug/L <br /> Result 167 164 120 <br /> MS % Recovery 84 82 60 <br /> Dup Result 165 175 110 <br /> MSD % Recov 83 88 55 <br /> RPD 12 65 87 <br /> RPD Limit 0-30 0-30 0-30 <br /> LCS # LCS122998 LCS122998 LCS122998 <br /> Prepared Date 12/29/98 12/29/98 12/29/98 <br /> Analyzed Date 12/30/98 12/30/98 12/30/98 <br /> Instrument I D # F4 F4 F4 <br /> Conc Spiked 200ug/L 200 ug/L 200 ug/L <br /> LCS Result: 278 369 193 <br /> LCS %Recov 70 92 48 <br /> LCS <br /> Control Limits 24-96 9-103 26-127 <br /> Please Note <br /> i <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> VSEGALY7[CAL preparation,and analytical methods erriployed far 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 /> MS=Matrix Spike,MSDer Page 3 of 3 98121788 BLA <5> <br />