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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> fRESNA Client Project ID 54006 06 Coca Cola Stockton <br /> 1710 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> Attention Jeanne Homsey QC Sample Group 4692201-2 Reported Feb 18, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8024 EPA 8020 EPA 8020 EPA 8020 <br /> --Analyst J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD <br /> Batch#: 4BS4501 4884501 4884501 4B84501 <br /> Date Prepared. - _ - - <br /> Date Analyzed• 2/16/94 2/16/94 2/16/94 2/16/94 <br /> I Instrument I D #. GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Cone Spiked- 10Ng/L 10pg/L 10pg/L 30pg/L <br /> Matrix Spike <br /> % Recovery. 110 110 110 110 <br /> Matrix Spike <br /> 1 Duplicate <br /> Recovery- 110 110 110 110 <br /> Relative% <br /> Difference: 00 00 00 00 <br /> n n v r •t n r +r v n v { v rvr {' n , <br /> LCS Batcn#. <br /> Date Prepared: = <br /> Date Analyzed- <br /> Instrument I D.#: <br /> LCS% <br /> Recovery• <br /> % Recovery <br /> Control Limits- 71-133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> EQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> L <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 /> Vickie <br /> ' Project Manager 4892201 wAT <2> <br />