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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364-9600 FAX(4t5) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Touchstone Developments Client Project ID Chevron 9-8264/8264-1 <br /> 6280 Stoneridge Mall Rd , B211 Matrix Solid <br /> Pleasanton, CA 94588 <br /> Attention Anne Marie Dockstader Work Order # 9511554-01-03 Reported Nov 14, 1995 <br /> r <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Beryllium Cadmium Chromium Nickel <br /> OC Batch# ME110995601OMDE ME11IM560101VIDE ME110995WIOMDE ME110995601OMDE <br /> Anally Method: EPA6010 EPA6010 EPA6010 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 #: 9511W401 951155401 95115540i 951155401 <br /> Sample Conc : 073 N D 43 45 <br /> Prepared Date' 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Analyzed Date: 11/10/95 11/10/95 11/10/95 11/10/95 <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 98 92 130 140 <br /> MS % Recovery 97 92 87 95 <br /> Dup Result: 98 92 140 130 <br /> MSD% Recov.: 97 92 97 85 <br /> RPD: 00 00 74 74 <br /> RPD Limit: 0-30 0-30 0-30 0-30 <br /> LCS #. BLK110995 BLK110995 BLK110995 BLK110995 <br /> Prepared Date 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Analyzed Date. 11/10/95 11/10/95 11/10/95 11/10/95 <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: 100 100 100 100 <br /> LCS % Recov.: 100 100 100 100 <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-free matrix that is analyzed using the same reagents, <br /> SUOIA 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 /> Mark Cargasacchl <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9511554 TTT <3> <br />