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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364.9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 9889600 FAX(510)988-9673 <br /> a) <br /> 4w Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> *% <br /> ............ <br /> "Blaine Tech Services, Inc. -F2 <br /> Client Project ID: Chevron 9-8632 970902 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> San Jose, CA 95112 <br /> Attention: Fran Thie Work Order#: 9709126-04 Reported: Sep 17, 1997-.--. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: MTBE <br /> QC Batch#: MSD908978260F3A <br /> Analy. Method: EPA 8260 <br /> Prep. Method: N.A. <br /> Analyst: M.Williams <br /> MS/MSD#: 970902005 <br /> Sample Cone.: N.D. <br /> Prepared Date: 9/8/97 <br /> Analyzed Date: 9/8/97 <br /> Instrument I.D.#: F3 <br /> Cone. Spiked: 50,ug/L <br /> Result: 46 <br /> MS % Recovery: 92 <br /> Dup. Result: 47 <br /> MSD % Recov.: 94 <br /> RPD: 2.2 <br /> RPD Limit: 0-25 <br /> ..... ... ........ <br /> . ......... ........... <br /> .......... <br /> . ..................................... .............................. ... . <br /> LCS #: VDBO90897 <br /> Prepared Date: 9/8/97 <br /> Analyzed Date: 9/8/97 <br /> Instrument I.D.#: F3 <br /> Cone. Spiked: 50pg/L <br /> LCS Result: 48 <br /> LCS %Recov.: 96 <br /> MS/MSD 60-140 <br /> LCS 70-130 <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 /> S 0 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 /> tri <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 /> gePenner NIS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> oject Manager <br /> 970-9126.BLA <7> <br />