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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) 988 9600 FAX (510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> • MPDS Services Client Project ID 'Tosco#5886 2701 W March Lane Stockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Jarrel Crider QC Sample Group 7120163.173 Reported Dec 19, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> F <br /> LYTE Diesel <br /> hod EPA8015M <br /> lyst K Grubb <br /> MS/MSD <br /> Batch# eLK120597A <br /> Date Prepared 12/5/97 <br /> Date Analyzed 12/8/97 <br /> Instrument I D # HP 38 <br /> Conc Spiked 50099/1- <br /> Matrix <br /> 0099/LMatrix Spike <br /> %Recovery 31 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 64 <br /> Relative % <br /> Difference 70 <br /> LCS Batch# LCS120597A <br /> Date Prepared 12/5/97 <br /> Date Analyzed 12/8/97 <br /> Instrument I D # HP-3B <br /> LCS % <br /> Recovery 52 <br /> 04 ecovery <br /> Control Limits 60-140 <br /> Please Note <br /> The LCS is a control sample of known Interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 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 /> 0ignature on File the recovery of analytes from the matrix spike does not tall within specified control limits due to matrix <br /> Alan B Kemp interference,the LCS recovery is to be used to validate the batch <br /> Project Manager <br /> 7120163MPD <12> <br /> ?f% <br />