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PCE Concentration <br /> 250 - <br /> 225 ---------------------------------- -------------------------------------- ---- ------------------------ <br /> 200 --------------------------------------------------------------------------------------------------- -- <br /> 175 ------------------------------------------------------------------- ------------------------------ -- <br /> 150 --------------------------------------------------------------------------------------------------- <br /> c <br /> 0 <br /> 125 ..................................................................................................... <br /> e <br /> v <br /> 0 100 ..................................................................................................... <br /> V <br /> 75 . ....................................-------.......--------............................................ <br /> 50 ----------------------------------------------------------------------------------------------------- <br /> o25 ....................................................................... .............................. <br /> ® 0 <br /> ~ 11/3188 11/3/89 1113/90 11/3/91 11/2/92 11/2/93 11/2/94 11/2/95 11/1196 11/1/97 <br /> .. O <br /> Sam le Date <br /> w <br /> W <br /> Arl_data.xls mw7 plot 11/24/98 <br />