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Sequoia 680 Cheupe;ke Drive Redwood City,CA 94063 (415) 364.9600 FAX(4 15) 364.9233 <br /> Analytical 404 rel.lxnset Lane Wtrtr;,C-tek,G 94398 (510) 988.9600 FAX(310)988.9473 <br /> 819 Striker Avenue,Suite 8 Sammento,CA 95834 (916) 921.9600 FAX(916)921.0100 <br /> I L <br /> \\'�'�z f %/!/"'23*`' `lux"A�'x3:t�:a rt::::,l r'\\\�x53,'�/, \IMI �%f:>� `•X�r.: f ,.x� v. <br /> ton <br /> Geoscfence •, //riir.., .. <br /> Client Pro�ect,D: Mobil 64-343 <br /> 30-A Lindbergh Ave. Matrix: Solid <br /> Livermore, CA 94550 <br /> Attention: Ailsa LeMay QC Sample Group: 5060180-89 <br /> Reported:Re <br /> Po Jun 12, 19M:.i <br /> it:X.^:.?:<.:�,.,.:.r..r.!... ....,.. '�;ti.•::x:r•irn.xc:{.:.�.r::r.>y <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: J.Fontecha J.Fontecha J.Fontecha J.Fontecha <br /> MS/MSD <br /> Batch#: 5060166 5060156 5 0186 -RMI ff <br /> ' Date Prepared: 6/7/95 6/7/95 6/7/95 6/7/95. <br /> Date Analyzed: 6/7/95 6/7/95 6/7/96 6/7/95 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> ' Conc. Spiked: 0.40 mg/kg 0.40 mg/kg 0.40 mg/kg 1.2 mg/kg <br /> Matrix Spike <br /> %Recovery: as 93 98 100 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 88 95 100 100 <br /> Relative% <br /> Difference: 3.5 2.1 2.0 0.0 <br /> .............. v.Y' v.:.{-::::::R:F9:....{i;i¢yri?-]:'Gsr.}.v,.:{.::e -::n.r ::•:vim•v.-:::..... <br /> :....v-...... ..v.........::::.::::.......: v r..::.vY:::i::i.�::}:�:. ....n...........:. .....-... ...:. .............. .iv. r:�: <br /> •:�'t::':':.::..... ..... ! ..Y::.v ........................:::Yr:�:-:::{•:::.Y:.�:::.:.;.Y::::.-;.:::::.�i::�i:•r::4:._:.Y.v:.::..:::................-.......]...:..................{...:.r.:ry:........ ..:.{.ti:.r..vrf.;:::-::::..........::i:4}::::.�:? <br /> :...}:ii iiisi:ii:::..;u.•-4.,..:.r::]:v:,.{:::+iii:%,i•.r:.vV:.,:•:::::::i::..:�:.�::::::.:. <br /> ..,u.................:..nV....,..-..r,...v]A 3 +Rvv:::.C.V....l:-r:::.:v::.:x.v::::.:�.:x........a.:.::::::�iiir::-lir:�:iti-:iC:v;{•i}::ti1�i::._. .:4.:t: ...:: - <br /> ...v <br /> ' LCS Batch#: 2LCS060795 2LCS060M 2LCS060795 2LCS060795 <br /> ' Date Prepared: 6/7/96 6/7/95 6/7/95 6/7/95 <br /> Date Analyzed: 6/7/95 6/7/95 6/7/95 6/7/95 <br /> Instrument I.D.#: HP4 HP-4 HP-4 HP-4 <br /> LCS% <br /> Recovery: 103 109 118 113 <br /> ' Recovery <br /> Control Limits: 55-145 47-149 47-155 56-140 <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 /> Vfortified with known quantities of specific compounds and subjected to the entire analytical procedure. 0 <br /> 6-,�6 (( the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recove Is to be used to validate the batch. <br /> Kevin Van Slambrook <br />' Project Manager <br /> SM180ALT <10> <br />