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I <br /> j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> (5m10) 686-9600 FAX (510) 686.1-89689 <br /> i}'M'l*P'^^ bh>.}AVCO'Fhv.C.Wviv+hi ^r.C•e.AJ { �%-0 o' J L DVe5000WYR.�rw�� G�w.4'�L.onOn.d;v <br /> o-rB Ko�x - ywoaKaewom� , w. ti� e+y+»psvc <br /> ux Associates sera A ro ext 1 2� b oc on ; <br /> 1855 Gateway Blvd , Ste 770 Matrix Soll s <br /> Concord, CA 94520 ; <br /> {Attention Paul Supple y QCT Sample Group 310-0274 Reported} Oct 12, 1993rd <br /> ��rnr4 v�A+F+.hurv"~ao[+.,.rn vm�k~vx.'}c�vfi y4ay.vvr:4 Ji4ibCirsvrfmriSrwnYY w.�r ir�$n Y?�J`+4r ro` ti7.4u0.v rh�nk4 Hfin.J+���Y'''ptirv'}2 Mrs :.~vrvVm\W w�4<knn4 vG.J:'.F�'Hk 2'C'o bra y,..set[ <br /> �v��Co44ivvk illi3xxl <br /> QUALITY CONTROL DATA REPORT <br /> ARAIWE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 5020 EPA 8020 <br /> Analyst: J F J F J F J F <br /> Conc. Spiked: 040 040 040 12 <br /> Units: mg/kg mg/kg mg/kg mg/kg <br />' LCS Batch#: 3LCS100793 3LOS100793 3LCS100793 3LCS100793 <br /> Date Prepared: 10/7/93 10/7/93 10/7/93 10/7/93 <br /> Date Analyzed: 10/7/93 10/7/93 10/7/93 10/7/93 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery: 123 118 115 113 <br /> Control Limits: 7o-13a 70-130 70-130 70-130 � <br /> a�,.o�..�°x �f�%��:+ �%aao�s5`.a�e`ri{c:,o.c`.pio�4'.o'ea}r{a{e'2:4:kn+F��n'^^���40.;,.`.`�` .w.� �SY�••Fv i�cc`fi�>sa 4yo or arum oo�i�°[r2rY rot fi3,,.r a,Fn;r ,o`u ,c�:}`�r�r4 .�Fr o� <br /> lat. te+:W.OQ<2Se¢.'Lr,Y4a.X,.,..c.a�.�S�.wi° w..:,v..,sc::Vnvsi:atia„Ra,.rs...bR`,:nnvS.sw,.. JcctEr,.u„rar+uc;6,.w'..Jo-x <br />' MS/MSD <br /> Batch#: 3100267 3100267 3100267 3100267 <br /> Date Prepared: 10/7/93 10/7/93 10/7/93 10/7/93 <br /> Date Analyzed- 10/7/83 10/7/93 10/7/x3 10/7/93 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 <br />' Matrix Spike <br /> %Recovery: 110 105 100 99 <br />' Matrix Spike <br /> Duplicate% <br /> Recovery. 127 125 125 120 <br />' Relative% <br /> Difference: 14 17 17 19 <br /> FEQU041AA,AN YTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> ation and analytical methods employed for the samples The ICS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results <br /> Kenneth K.F Lee <br /> Laboratory Director <br /> 3100274 ROU <3> <br />