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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> �" e1 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 0 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 /> i <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 Phenol 2-Chlorophenol 1,4-Dichloro- N-Nitroso-Di- <br /> benzene N-propylamine <br /> OC Batch# M81112988270EXA MS1112988270EXA MS1112988270EXA M81112988270EXA <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 NO <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 ug/L 200 yg/L 200 Ng/L <br /> Result 126 144 121 149 <br /> MS % Recovery 63 72 61 75 <br /> Dup Result 98 162 123 141 <br /> MSD % Recov 49 81 62 71 <br /> RPD 25 12 16 55 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS # LCS111298 LCS111298 LCS111298 LCS111298 <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 ug/L 200jig/L 200pg/L 200lig/L <br /> LCS Result 58 99 95 121 - <br /> LCS % Recov 29 50 48 61 <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 /> SEQUOIA N YTICAL 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 /> gory **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference <br /> AVrct Manager Page 1 of 3 9811696 BLA <6> <br />