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1 <br /> 4D <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 1900 Bata Avenue,Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> i1W Analytical 819 Striker Avenue Suite 8 Sacramento C4 9$834 (916) 921 9600 FAX(916)921-0100 <br /> �! . f ::•.N�+bSdxY'Ay{n+�lJ'+y-0'�b:}fI! Ka JJ-frr4o++Y rF.h'Lh Sw,[L ,, ri ..i 'leWb i-Kvcn hr';�W.,� F 4^r �C+ lFi ♦ Yr D <br /> ' s - �"+'-:..J..-.o-'h:...t!'"• •rs'vX.oc nr ��.5✓' �.scc.,. S"s,.:.�r < - .R�:A:v(�w.`.ixf,w�wc'.�i.Lyv'0�$na�r�W:^wcb� �i <br /> °RESNA Client Project ID 150103 01,Chevron Stockton <br /> 1710 Main Street Matnx Liquid <br /> Escalon,CA 95320 <br /> „Attention John Lane CC Sample Group 9409015-03 N Reported _ Sep 15, 1994 [ <br /> i� Iry r.A cal K,7 fir.'.,...cwr , x or ,�e*o w •r^�ems.,.. v,. '..3.,. 2 c Y�r:. r..fi,.}r}'�r�5.o�s>'.rL a,�F"'`£rr v.,:Y.w,r`�,sn� .xG1.c.�St�i�H, Ct$`# 3�Ya,r.. <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 Minkel J Minkel J Minkel J Minkel <br /> MS/MSD <br /> Batch#: 940912106 940912106 94M12106 940912106 <br /> Date Prepared: - - - <br /> Date Analyzed: 9/12/94 9/12/94 9/12/94 9/12/94 <br /> Instrument I D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Conc.Spiked: 10yg/L 10pg/L long/L 30Ng/L <br /> Matrix Spike <br /> %Recovery: 95 95 94 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 100 100 100 100 <br /> Relative% <br /> Difference: 51 51 62 73 <br /> ryY Y,.Yr,'xr.';t"`ti +v,++ iac`"'°tw <br /> +' a'ic $ic+�r e \ Yfi�YPc'kx�^c,cQ t•L r �r y ,.. .—I& <br /> �x}y+h}� � �/�'s <br /> 4+. [ x JXs"t�%" v t Kv��khn•' r� titi+r s.ir+r'4�A�+.�454%S£i hRvwS v.yriJC ivnwJ meJ ?iJ tivi]iJ� <br /> LCS Batch#: - - - - <br /> Date Prepared: - - - - <br /> Date Analyzed: - - - - <br /> Instrument I D.#. - - - - <br /> LCS% <br /> Recovery: - - - <br /> %Recovery <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS is a control sample of known,tnterferent free matrix that is analyzed using the same reagents, <br /> 0 SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> torbfted with known quantities of specific compounds and subjected to the entire analytical procedure if <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Zague Clark <br /> Project Manager 9409015 WAT c3> <br />