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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue -• Suite LM • Concord,California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> {:.'!.U- :.fr::• •?%JF.rxe...:; - ::.in. n.p-.ih::r}t'? '-'."Y <br /> ...e.v:..;...i � ................ :...:.::..J r!... ......::�i.:'F..}:;;:.i�:{.::{rr��,�:-•:n},y:. .,x.... .:::��::' .. <br /> .,{.. ^C.. nu7i:*r - '::'ti],.iY :n�'�'v�:iiY�:.i �:M:`%y� :-'l: �`li?^•. <br /> +:�.. - .; \3..h.,.n.•.:�a!,22.., ... �f.::.n{x,. :-,. Y":\,.:%:.<:;'3�.:»+,i�e.`^t.+e..w:itivw:. :.r n:{<`at�:x:%.a...h:i:9.r! <br /> lton Geoscence Y Client lrii ect°ll3f fvlob� (1443%#30-013f;J <br /> 870 Stoneridge Drive, Suite 6 Matrbc. N Water <br /> (Pleasanton,CA 94588 <br /> fi; <br /> Attention: Stephan Rosen -145QC Sample Group 3040133 Reported: Apr 9, 1993 <br /> $ n <br /> yyy,,-/�{:�x� ,:.}{;,� ::"wvt f'!9':' :7�u.: Xrr4i'�^2'G::+r:. W.�.:oS:, +�;{�{-ysf'. •¢•?.x,{�:y: :.?F�r.{ti�•p.}Y• '.2;'`r,.ro4 s:ti::v>:eY`�r,4�-r;.;ry(.� .i{-: �}y�p� ,:.�(.}•r.^'.,;�.; ?.. <br /> .�<�friiih�: :}.re.V'C�+i:'�Y.-0i:iiv�::Y.\::�}.1n�ff A�M�ivMs�}:i]�wu:�::r:$}.�y+YXv::ii:}�.4�•}y:4{h �:G..n{:ne14./k,]6�`Y?}Y� �l�`fi�v:iiWU )., \�h.:,l!'.?Ri4!{CVti"�."A.'�9r`.�/:i;!l i�Mh`<��ifi:ti•�iir�§� <br /> (QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> -Benzene Toluene Benzene Xylenes Diesel <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Analyst: A.T. A.T. AT. AT. KVAmer <br /> Conc. Spiked: X20 20 20 60 300 <br /> Units: Ng/L yg/L ug/L ug/L pg/L <br /> LCS Batch#: LCSO40693 LC6040693 LCSO4 M LCSO40693 BLKM07W <br /> Date Prepared: 4/6/93 4/6/93 4/6/93 4/6/93 4/7/93 <br /> Date Analyzed: 4/6193 4/6/93 4/6/93 4/6/93 4/8/93 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 HP-3B <br /> LCS% <br /> Recovery: its 111 110 114 98 <br /> Control Limits: 70.130 70-130 70.130 70-130 M130 <br /> :v::::...::.-.:........................::•:::•:;....•-w::.v:::::.v:::v;...;v::::::::.:x:.iii}:v::::::................... ... <br /> ::rr}:{;r n:.Y::?::i i.}:{{::;m• :.i:{.}::xi{{,}L.uvvr F-::i.::i::::is-:::iv N}:K••.y�}: .i:T:.,.. <br /> ........:.:.v .r.-..:..:.......,:.:r:::1..............,.::::............., ....::..�;.:.i{.,;._;.;•:::::.r::::::::::z:-::.:....................:::.:.v::v.d.:iw :....... irC <br /> :.:::.....:::::.::..:: ..........n..�::�v...........:.,.:.x...::::.{w:::::::: �.::v.:�w.r•::,l:h..y:. <br /> :::::.u;}:-:-:'::':._::::;•:::•,-:-...::,�:::•.�::�::::ri:�:�i:ii?!-ii:^::{•Y:i{•:._::':iv.;::::.:v :..........:.: - vv.:::r}:.:.:::r.::.r;:ti:?':='•:. <br /> ..........................:.................. <br /> ..............................................................n..:.........................::.\............:.::.::::.�::...............::.::..:'x:•....M:........... ....:: :nv.v/�:u^:-i j:%-isii+i�=%�::::4:{•:::{:::L�\ri:• `: <br /> MS/MSD <br /> Batch#: 3040107 3040107 3040107 3040107 040793 <br /> Date Prepared: 4/6/93 4/6/93 4/6/93 4/6/93 4/7/93 <br /> Date Analyzed: 4/6/43 4/6/93 4/6/93 4/6/93 4/8/903 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 HP-38 <br /> Matrix Spike <br /> %Recovery: .110 110 110 110 <br /> 91 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 70 70 70 70 g6 <br /> Relative% <br /> Difference: 44 44 44 44 5.3 <br /> SEQUOIA ANALYTICAL Please Note: <br /> The-LCS Is a control sample of known,interferent tree matr6c that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples. The LCS%recovery data Is used for <br /> validation of sample Hatch results, We to matrix effects,the OC limits for MS/MSUs are advisory only <br /> and are not used to accept or reject batch results. <br /> Ott 1 0 <br /> Project Manager 3040133.ALT <6> <br />