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i <br /> 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9500 FAX(925)988-9673 <br /> 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)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264/981124-J2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order # 9811 H50-01 Reported Dec 22, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Phenol 2-Chlorophenol 1,4-Dichloro N-Nitroso-Di <br /> benzene N-propylamine <br /> QC Batch# MS1130988270EXA MS1130988270EXA MS1130988270EXA MS1130988270EXA <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 # 9811F3608 9811F3608 9811173608 9811F3608 <br /> Sample Conc N D ND N D N D <br /> Prepared Date 11/30/98 11/30/98 11/30/98 11/30/98 <br /> Analyzed Date 12/2/98 12/2/98 12/2/98 12/2/98 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 200 pg/L 200 vg/L 200 kg/L 200 pg/L <br /> Result 51 107 109 116 <br /> MS % Recovery 26 54 55 58 <br /> Dup Result 50 109 111 115 <br /> MSD % Recov 25 55 56 58 <br /> RPD 20 19 18 087 <br /> RPD Limit 0-30 030 030 0-30 <br /> i <br /> LCS # LCS113098 LCS113098 LCS113098 LCS113098 <br /> Prepared Date 11/30/98 11/30/98 11/30/98 11/30/98 <br /> Analyzed Date 12/2/98 12/2/98 12/2/98 12/2/98 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 200 Mg/L 200ug/L 200Ng/L 200pg/L <br /> LCS Result 46 94 92 98 <br /> LCS %Recov 23 47 46 49 <br /> LCS <br /> Control Limits 12-110 27-123 36-97 41 116 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUQIA ANAL ICAL 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 /> Ory **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference <br /> r I Manager Page 1 of 3 9811H50 BLA <4> <br />