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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wlget Lane walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Z1-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)79Z-0342 <br /> i <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 1 2 4-Tnchloro- 4 Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <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/MSO # 9811F3608 9811F3608 9811F3608 981 1173608 <br /> Sample Conc N D N D 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 Mg/L 200 pg/L 200 Mg/L <br /> Result 151 136 139 68 <br /> MS % Recov,e Y 75 68 70 34 <br /> Dup Result 151 136 144 68 <br /> MSD % Recov 76 68 72 34 <br /> RPD 00 00 35 00 <br /> RPD Limit 030 0-30 0-30 0-30 <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/I- 200 ftg/L 200 pg/L 200 pg/L <br /> LCS Result 122 113 107 50 <br /> LCS % Recov 61 57 54 25 <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 ANA YTIC 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 /> Ik gory *"MS=Matrix Spike, MSD=MS Duplicate, RPD=Rel ative%Difference <br /> Project Manager Page 2 of 3 no:>n 9811 H50 BLA <5> <br />