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SEQUOIA ANALYTICAL <br /> j 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> "; ?a'aFur; .icw.'�..v n,.r,Y` r rvr-rr nH\�' vcr,`Ji n°s n`xP..u.'w r •w.•yJ.f4?.w.W G,rc 4^{j vMfM 'c'K..:;.fi'r.yn'`rS)''i,Rr v:,rrv'N.'ka'rE.rdrk'.. .°,..w.tv�hb K,.Nky n%ni.cwc.:."C<.wwrF'ry r: <br /> u x Associates r Cl�eni 'ro)fiect fD Arco 2�Sb= .i=� <br /> 1855 Gateway Blvd , Ste 770 Matrix Soil ;2 <br /> Concord, CA 94520 <br /> Attention Paul Supple OC Sample Group 3090450-454 _ Reported Sep 22, 1993 <br /> �vv v M1 tea rr ` u r n r r r v +.Ji`MV• v rpn r v }}.{nti pxti hxn}+rcv>�rlF mvtvv!} r v nYr try v x r v ter} <br /> } r i ♦ 4xw v rri v'4F'i'{4 rM hi` x'OGx err ♦v }4 p} v i v rI W~ v i ` <br /> QUALITY CONTROL DATA REPORT <br /> NALYT Ethyl- <br /> Benzene Toluene Benzene Xylenes <br />' Method: EPA 8020 EPA 8020 EPA 8024 EPA 8020 <br /> Analyst J F J F J F J F <br /> Conc.Spiked 0 40 040 0 40 12 <br /> Units m9/Kg mg/Kg m9/K9 mg/K9 <br /> LCS Batch#: 1 LCS092093 1 LCS092093 i LCS092093 1 LCS092093 <br />' Date Prepared 9/2o/93 9/2x/93 9/20/93 9/20/93 <br /> Date Analyzed 9/20/93 9/20/93 9/20/93 9/20/93 <br /> Instrument I D # HP-2 HP-2 HP-2 HP-2 <br /> LCS % <br /> Recovery: 108 103 106 105 <br /> Control Limits. 70-130 70-130 70-130 70-130 <br /> F Y�.�Jtiti�}ir}ikr Jnr ♦ v xh v v{n v r i` +nv .vr r r}}`err �4} ss yr}v.0 w{v tJw ,.v..vr r. .. vw rry rvry n-nnr r r ry+f rc r r ry r { <br />' MS/MSD <br /> Batch #: 3090459 3090459 3090459 3090459 <br /> 1Date Prepared: 9/2o/93 9/20/93 9/2x/93 9/20/93 <br /> Date Analyzed: 9/20/93 9/20/93 9/20/93 9/20/93 <br /> Instrument I.D * HP-2 HP-2 HP-2 HP-2 <br />' Matrix Spike <br /> %Recovery 104 97 100 98 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 100 97 97 97 <br />' Relative% <br /> Difference 00 00 30 10 <br /> FKKenn.thK <br /> QUOIA ANALYTICAL lease Note <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 LCS%recovery data is used for <br /> Nammon of sample batch results Due to matrix effects,the QC limits for MS/MSUs are advisory only <br /> and are not used to accept or reject batch results <br /> F Lee <br /> Laboratory Director <br />' 3090450 ROU <27 <br />