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Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Cllent Project ID Chevron 9-2033 /970519-H2 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9705B57-01 Reported Jun 4, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte- Phenol 2-Chlorophenol 1,4-Dichloro- N-Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch# MS0528978270EXA MS0528978270EXA MS0528978270EXA MS0528978270EXA <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 8 Pitamah B Pitamah <br /> MS/MSD # 970568604 9705B8604 970568604 9705138604 <br /> Sample Conc 12 N D N D ND <br /> Prepared Date 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked. 200 pg/L 200 pg/L 200pg/L P00 pg/L <br /> Result 84 129 128 125 <br /> MS % Recovery 36 65 64 63 <br /> Dup Result 1 i 1 139 128 133 <br /> MSD % Recov 50 70 64 67 <br /> RPD 28 75 00 62 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS# WBO52897 WBO52897 WBO52897 WB052897 <br /> Prepared Date 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Instrument LD # H5 H5 H5 H5 <br /> Conc Spiked 200pg/L 200yg/L 200pg/L 200 pg/L <br /> LCS Result 104 116 102 116 <br /> LCS %Recov 52 58 51 58 <br /> LCS <br /> Control Limits 12-110 27-123 3697 41-116 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagentst <br /> WEN LYTICAL 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 /> Peg y P er **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> Prod ct anager Page 1 of 3 9705B57 SLA <6> <br />