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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5 10)988 9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Touchstone Developments Client Project ID 8264-2, Chevron 9-8264 <br /> P 0 Bax 2554 Matrix Solid <br /> Santa Rosa, CA 95405 <br /> Attention Jeff Monroe Work Order# 9511A10-02 Reported Nov 27, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Barium Beryllium Cadmium Chromium <br /> QC Batch# ME111595601OMDE ME111595601OMDE ME111595601OMDE ME111595601OMDE <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> Analyst C Medefesser C Medefesser C Medefesser C Medefesser <br /> MS/MSD # 9511Al002 9511A1002 9511AID02 9511A1002 <br /> Sample Conc 064 ND 46 37 <br /> Prepared Date 11/15/95 11/15/95 11/15/95 11/15/95 <br /> Analyzed Date 11/16/95 11/16/95 11/16/95 11/16/95 <br /> Instrument I D # MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc Spiked 100 mg/Kg 100 mg/Kg 100 mg/Kg 100 mg/Kg <br /> Result 97 95 150 130 <br /> MS % Recovery 96 95 104 93 <br /> 0 Dui} Result 98 96 150 140 <br /> MSD % Recov 97 96 104 103 <br /> RPD 10 10 00 74 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS# BLK111595 BLK111595 BLK111595 BLK111595 <br /> Prepared Date 11/15/95 11/15/95 11/15/95 11/15/95 <br /> Analyzed Date 11/16/95 11/16/95 11/16/95 11/16/95 <br /> Instrument I D # MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc Spiked 100 mg/Kg 100 mg/Kg 100 mg/Kg 100 mg/Kg <br /> LCS Result 110 110 110 100 <br /> LCS % Recov 110 110 110 100 <br /> IVIS/MSD <br /> LCS 75-125 75-125 75-125 75-125 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known, interferent-tree matrix that is analyzed using the same reagents, <br /> :JC <br /> IA ANALYTICAL 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 /> Cargasacchl <br /> Project Manager **MS=Matrix Spike MSD=MS Duplicate,RPD=Relative% Difference 95l lA10 TTT <10> <br />