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OCT 19 '93 13.12 SEQUOIA ANALYTICAL P 4 <br /> SEQUOIA ANALYTICAL. <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415)364-96W • FAX(415)364-9233 <br /> ;yRESNA - <br /> rg �Project 1D W0169.00. BJJ Tracy <br /> 1710 Main Street � <br /> Escalon.CA 95320 <br /> �Attentlon. lois Fraraz 4C Sant a Gt-vu� 3115301-2 Reported• Od 19. 1993 <br /> QUALITY CONTROL DATA REPORT <br /> AMALYIV Ethyi- <br /> Benzene Toluene Benzene X nes Diesel <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Analyst: M.Mpp M Mpp M Nipp M Mpp V.H <br /> Conc.Spiked: 10 10 10 30 300 <br /> Units: PDX 1+8/L MQ/L M9/L N9/L <br /> I=E*k": %x100®83 OLIC10ot393 MK100693 M100M BLX10DM <br /> /7/93 <br /> Date - 10 <br /> - - - <br /> Date Analyzed: 10/9/93 10/6/I3 10/s/93 10/6/93 10/8/93 <br /> Instrument I.D.#: GCHP-2 G0HFk-2 GCHP-2 GCHP 2 GCHPS <br /> LCS% <br /> Recovery: 100 100 100 100 65 <br /> Control LIMB: 80-120 8bt2o 80.120 80.120 50.150 <br /> MS/MSD <br /> BMch#: 3110902 311090~2 3110902 2u10902 3 IWI <br /> Date Prepared: - - 10/7/93 <br /> Date Analyzed: 10/6/93 10/9/93 10/e/93 10/9/93 10/12/93 <br /> Instrument I.D.#: GCF+P,2 GCHP-2 GC14P 2 GCHP-2 GCHP-6 <br /> Matrix Spike <br /> %Recovery: 9s 97 9a 97 as <br /> Mstrix Spike <br /> Dupikote% <br /> Recovery: 92 92 92 93 T! <br /> Relative% <br /> Difference: 4.3 5.3 6.3 4.2 13 <br />�sl:ouolA AruALrnca. Please Nae- <br /> The LCS is a control sample of known.interferent free matdx that is analyzed using the same reagenes <br /> PrOPMOOn arkd aMUYdcwW M01ods employed for the samples Tri*LCS%reoovery data,Is used for <br /> vairdabon of sample tiatoh reaurA. Due to mama effects,Vie GC hmrts for MS/MD's are ad"wry only <br /> and are not used to amept or reject batch results. <br /> Vickie Tagus <br /> PrcgectManaW 3J15301-WAT <3-% <br /> I <br /> I <br />