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fl / ■ H Sequoia U 680 Chesapeake Drive Redwood Ciry,CA 94° ) (415) 364.9600 FAX(415)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94 / (510) 988-9600 FAX(510)988.9673 y <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921.0100 <br /> fl '1 <br /> :1 <br /> Touchstone Developments :1 Client Project ID: 9-1452, Chevron 9-1452 <br /> ::5807 Balboa Drive Matrix: Solid <br /> F; <br /> .".-Oakland, CA 94611 <br /> Attention: Robert Mallory Work Order#: 9509J53-01, 02 Reported Oct 13, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: 1,2,4-Trichl6ro 4-Chloro-3 Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch#C MS0928958270EXB MS0928958270EXB MS0928958270EXB MS0928958270EXB <br /> Analy. Method: EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep. Method: EPA 3550 EPA 3550 EPA 3550 EPA 3550 <br /> i <br /> Analyst: B.Pitamah B. Pitamah B.Pitamah B.Pitamah <br /> MS/MSD #: 9509H5907 9509H5901 95091-15901 9509H5901 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 9/28/95 9/28/95 9/28/95 9/28/95 <br /> Analyzed Date: 9/28/95 9/28/95 9/28/95 9/28/95 <br /> Instrument I.D.#: F4 F4 F4 F4 <br /> Conc. Spiked! 3"pg/Kg 3300 pg/Kg 3300 ug/Kg 3300 pg/Kg <br /> i 3 i <br /> Result: 2100 2300 2300 2300' . <br /> 1. MS % Recovery: 64 ; 70 70 70 <br /> Dup. Result: 2200 '' 2400 2400 2500 <br /> MSD% Recov.: 67 73 73 76 <br /> RPD: 4.7 li 4.3 4.3 8.3 i <br /> r RIND Limit: 0-50 I=. 050 0 50 0 50 <br /> LCS#: r <br /> Prepared Date: t <br /> Analyzed Date: <br /> Instrument I.D.#: <br /> Conc. Spiked: <br /> i <br /> LCS ResultF <br /> LCS % Recov.: <br /> M M D <br /> LCS 44.142 22-147 47.145 DL-132 <br /> Control Limits I+ ` <br /> 3 fC <br /> Please Note: <br /> The LCS is a control sample of known,interferent-tree matrix that is analyzed using the same reagents, p <br /> SE OIA ANALYTICAL H, 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 /> t interference,the LCS recovery is to be used to validate the batch. <br /> Mark . Cargasacchi **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager`; Page 2 of 3 9509J53.TTT <4> <br /> `' - - --- - — - -J <br />