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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Striker 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 9-2033 /980521-L1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order # 9805E75-01 Reported Jun 9, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> I <br /> Analyte 1,2,4-Trichioro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch# MS0526988270EXA MS0526988270EXA MS0526988270EXA MS0526988270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method' EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD # 9805E7501 9805E7501 9805E7501 9805E7501 <br /> Sample Conc N D ND N D N D <br /> Prepared Date 5/26/98 5/26/98 5/26/98 5/26/98 <br /> Analyzed Date 5/27/98 5/27/98 5/27/98 5/27/98 <br /> Instrument I D #- F4 F4 F4 F4 <br /> Conc Spiked 400 fig/L 400 frg/L 400 fig/L 400 ftg/L <br /> Result 294 286 278 130 <br /> IVS % Recovery 74 72 70 33 <br /> Dup Result- 283 280 269 131 <br /> MSD % Recov 71 70 67 33 <br /> RPD 38 21 33 077 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS # LCS052698 LCS052698 LCS052698 LCS052898 <br /> Prepared Date 5/26/98 5/26/98 5/26/98 5/26/98 <br /> Analyzed Date 5/27/98 5/27/98 5/27/98 5/27/98 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked- 400 fig/L 400 fig/L 400 fig/L 400 jig/L <br /> LCS Result 286 291 267 119 <br /> LCS % Recov 72 73 67 30 <br /> LCS <br /> Control Limits 39-98 23-97 46-118 10-80 <br /> Please Note <br /> The LGS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> �EQU ALYTICAL 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 /> regory **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference <br /> ,IAProject Manager Page 2 of 3 9805E75 BLA <5> <br />