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SEQUOIA ANAMUCAL <br /> 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> (510) 686-9600 * FAX(610) 686.9689 <br /> Alton Geos <br /> cience Client Project ID-." Mobil 04-343 J 30-0136 <br /> 30-A Lindbergh Ave. Matrix: Uqufd <br /> ' Livermore, CA 94550 <br /> Attention Stephan Rosen 00 Sample Group: 4011128-39 Reported; Jan 28, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> AWAIWE Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 802D EPA 8020 EPA 8015 <br /> Analyst: J.Fontecha J.Fontecha J.Fontecha J.Fontecha K.W. <br /> MS/MSD <br /> Batch#: 4011128 4011128 401112E 4011128 BLK012794 <br /> Date Prepared: 1/26/94 1/26/94 1/26/94 1/26/94 1/27/94 <br /> Date Analyzed: 1/26/94 1/26/94 1/26/94 1/26/94 1/31/94 <br /> Instrument i.D.#: HP-5 HP-5 HP-5 HP-5 HP-3A <br /> Conc.Spiked: 20 frg/L 20{rg/L 20pg/L 60ug/L 3Wpg/L <br /> Matrix Spike <br /> % Recovery: 115 110 ' 100 102 83 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 115 105 100 101 82 <br /> Relative% <br /> Difference: 0.0 4.7 0.0 0.99 0.80 <br /> 1..:,,o- .:-' ... :•ro:;-;:::.....,.::;:::. ........::..::.:�.::•. - <br /> ....n........::::4\v.4r.,r.tt..4:i}n.: - :i:}::i' `:•l•}: :.::.. <br /> ...}.8xw:i:::y,_tiv.v::.ut,..v?:ti:.y.c•:vi::r':t:j_`.:}... .`'rl.::.r.':::::::�::;:':i${:r - <br /> : <br /> LCS Batch#: 3LCS012694 3LCS012694 3LCS012694 3LCS012694 BLKo12794 <br /> Date Prepared: 1/26/94 1/26/94 1/26/94 1/26/94 1/27/94 <br /> Date Analyzed: 1/26/94 1/26/94 1/26/94 1/26/94 1/31/94 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP�s HP-3A <br /> LCS% <br /> Recovery: 116• 112 109 109 83 <br /> Recovery <br /> Control Limits: 71-133 72-128 72-130 71-120 28-122- <br /> Please Note: <br /> The LCS is a control sample of known,Interferent free matrix-81',s a;a'yiad using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> fortified witty known quantities of speck compounds and subjected to the entire analytical procedure. N <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Karen L Enstrom <br /> interference. ,the LCS reCovery is to be used to validate the batch. <br /> _ <br /> Project Manager <br /> 401112SALT <5> <br />