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_s <br /> Sequoia 680 Chewpeake Drive �,�© CA <br /> ` h'� 94061 (41!} .9b0D FAX(415) !64.9288 l <br /> Suite 1 <br /> Analytical 404 N.WISet Une W81-9CMek CA 94591 ($10) 980.9600 FAX(5 to)9s1.96r3 <br /> t <br /> 119 Striker Avenue, Sacramento,CA 958!1 (916) 921.9600 fAX(916)92t•oloo <br /> %73 <br /> ys�n <br /> yAfton eosc�ence <br /> 30-A Lindbergh Ave. Matrbt: Liquid racy, <br /> Livermore, CA 94550 <br /> Attention: Kevin Keenan QC Sample Group: 5041325-38 ,r <br /> %///ryfii.'^•:; 2%%r"•?'ffi'T'K::".. � ' -:r%%7:a:nvn�>.�: Reported: May 5, 19% <br /> ...•'\\\\\\��\n��., . ., .4 rig{i////////•/Zai/�////1.': ;.:?.,:-.: ry,Y- <br /> QUALITY CONTROL DATA REPORT <br /> Benzene Toluene Ethyl Xylenes <br /> ANA <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: A Tuzon A,Tuzon A,Tuzon A.Tuzon <br /> MS/MSD <br /> Batch#: 5040829 5040829 504W29 504oe29 <br /> Date Prepared: 4/27/95 4/27/95 4/27/95 4/27/95 <br /> Date Analyzed: 4/27/95 4/27/95 4/27/95 4/27/95 <br /> Instrument I.D.#: HP-5 HP-3 HP-5 <br /> Conc. Spiked: 20pg/L HP-5 <br /> ►SIL 20 usa/L 60 pq/L <br /> Matrix Spike <br /> %Recovery: 105 105 <br /> 100 103 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 95 100 <br /> 95 100 <br /> Relative% <br /> Difference: 10 4.9 5.1 <br /> 3.0 <br /> ..:....,,,,.,,,,,,:.:,.::],2'• ^-u<`: ?`d:t .,fir <br /> .-r:tV:n , �•';:f \ :::::�::�. v:j ~ ;•i:�}L - vyt.}ynv+r:.., <br /> r..SS.v..`...: <br /> LCS Batch#: 3LCSO42795 3LCSO42795 3LCSO42795 3LCSO42795 <br /> Date Prepared: 4/27/95 4/27/95 4/27/95 4/27/95 <br /> Date Analyzed: 4/27/95 4/27/95 4/27/95 4/27/95 <br /> Instrument I.D.#: HP-5 HPC <br /> HP-5 yp•b <br /> LCS % <br /> Recovery: 100 101 99 101 <br /> ecovery <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> Please ts. <br /> SEQUOIA ANALYTICAL,#1271 <br /> The LCS Is a control sample of known,Interferent free matrix that Is analyzed using the same reagents, <br /> preparation,and analytical methods employed for the samples• The matrix spik <br /> pree is an aliquot of sample <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 rec4ve <br /> Kevin Van Slambrook Is to be used to validate the batch, <br /> Project Manager <br /> 504132E ALT <6> <br /> - i <br />