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Sequoia (J 690 Chesapeake Drive Redwood City,CA 9,1,�* ) (4115) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 943Se (510) 989-9600 FAX(510)988-9673 <br /> 8 t9 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-01 W <br /> Analytical <br /> :..:.Touchstone Developments Client Project ID: 9-1452, Chevron 9-1452 <br /> :5807 Balboa Drive Matrix: Solid <br /> ::',Oakland, CA 94611 <br /> ::;Attention: Robert Mallory Work Order#: 9509J53-01, 02 Reported: Oct 13, 1995 > <br /> .............. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Phenol. 2-Chlorophenol 1,4-Dichloro N-Nitroso-Di- <br /> benzene N-propylamine <br /> OC Batch#: 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 /> Analyst: S. Pitamah E. Pitamah B.Pitamah B. Pitarnah <br /> MS/MSD #: 9509H59d1 95091-15901 95091-15901 95091-15901 <br /> Sample Conc.: N.D. . N,D, N.D. N.D.1 <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: 3300 pg/Kg 3300,ug/Kg 3300 pg/Kg 3300 pg/Kg <br /> Result: 2300 2300 2000 2800 <br /> MS % Recovery: 70 70 61 85 <br /> Dup. Result: 2400 2400 2100 3100 <br /> MSD %Recov.: 73 73 64 94 <br /> RPD: 4.3 4.3 4.9 10 <br /> RPD Limit: 0-50 'A 0-50 0-50 0-50i <br /> 7 <br /> x" x X— ........................ ...—': <br /> .......... <br /> .............. ................... <br /> .................. ....... ....... <br /> .................... ........................... .............. . ......... <br /> LCS <br /> Prepared Date: <br /> Analyzed Date: <br /> Instrument I.D.#- <br /> Conc. Spiked: <br /> LCS Result: <br /> LCS % Recov.: <br /> MS/MSD <br /> LCS 5-112 23-134 20-124 DL-230 <br /> Control Limits: <br /> ii <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> S OIA ANALYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> 1) 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 /> r <br /> interference,the LCS recovery is to be used to validate the batch. <br /> Mar J. Cargasacchi MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager Page 1 of 3 9509J53-TTT <3> <br />