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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM a Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> '..r' r n .,��y,�,.,,. nA s+r '`r.{<""'c,,`.o,,.�.c:wax'n °"wrr.w°,} mo"'%'rriJ^cvo ho.o`s.1� ,:,c mar.ti.�-.i:w.acwixv.�'w�'r�.::wY <br /> ux Associates C;IIWRi Project Ila Arco'2130-" -1 <br /> 1855 Gateway Blvd , Ste 770 Matrix Soll r` <br /> Concord, CA 94520 <br /> fk Attention Paul Supple OC Sample Group 309-1356 Reported Oct 6, 1993 <br />�[r.N*K N w it ♦ nnn yr vv rrvn nr } ry ry ryn vu s rw iY Gv r u;4MvG tirMx^CG'r vM 4`G �rrv�l^J' w r ry s}ry'Y"'iv nnv.J.v >r�Y^^4fSr,v d GrM{�}Y 4`•'�+'n. r <br /> ^^' •}v�}.v+ }�r}}}n J vrt l JC{L G {{ Y. rr{ry +rr+•'i r }5v4,. }x},.{.. t <br /> QUALITY CONTROL DATA REPORT <br /> A <br /> ALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 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#: 2LCS100493 2LCS100493 2LCS100493 2LCS100493 <br />' Date Prepared: 10/4/93 10/4/93 10/4/93 10/4/93 <br /> Date Analyzed 10/4/93 10/4/93 10/4/93 10/4/93 <br /> Instrument I D #: HP-4 HP-4 HP-4 HP-4 <br /> LCS% <br /> Recovery- 95 95 94 96 <br /> I" C'ontrol Limits � 70-130 70-130 7G-130 <br /> �x. 1rrms30Y,rcr�4°e�n`{arr{iG..7cw.0r✓r-{rn1r`r3F r0 <br /> rryYa.nY-Gcrn,e0-rrxL.n.>..no`.:rr:..nry`c anf}ncwGGrrn}Grr rteG„neri,.'r�r Sr,Y{rvY.Grrrrn rnik<ernvririY{ft�v`r�me vr <br /> ]m. <br /> Gr}O:b.lO.Gre]66]M.q vFP v S.,.n+y,.,yfh RJ} vn ner rrr:vrv* r i x ,r•i? . . n. <br /> GG JOf v N.Gt.i4 r5tiww v FG v+nvRrnG Sti�l.O rt 4rA,v4 wr v.rG Gw •vntivu fi v+n+.vv m. n .v`G.,n . ��r. Gv w <br />' MS/MSD <br /> Batch#: 3091160 3091160 3091160 3091160 <br />' Date Prepared: 10/4/93 10/4/-93 10/4/93 10/4/93 <br /> Date Analyzed: 10/4/93 10/4/93 10/4/93 10/4/93 <br /> Instrument I D #: HP-4 HP-4 HP-4 HP-4 <br /> Matrix Spike <br /> %Recovery: 92 95 95 95 <br />' Matrix Spike <br /> Duplicate% <br /> Recovery: 90 90 90 87 <br /> Relative% <br /> Difference: 22 54 54 as <br /> SE1UOIA ANALYTICAL Please Note <br /> The LCS Is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> ptepbration and analytical methods employed for the samples The LCS%recovery data Is used for <br /> validation of sample batch results Due to matrix effects,the QC 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 />' 3091356 ROU <3> <br />