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PCE Concentration <br /> 1 <br /> 250 - <br /> 225 ----------------------------------------------------------------------------------------------------- <br /> 200 -------------------------------------.........._._..........-------•-----------------------..-...------- <br /> 175 - --------------------------------------................................................................ <br /> 150 •--------•.............................. ............................................................. <br /> c <br /> 0 <br /> R125 ------------------------------ ----------------------------------------------------------------------- <br /> c <br /> m <br /> c� <br /> 0 100 •--•----------------------------•------....._._.._-_----------------...._......------_. ... .-------- <br /> U <br /> 75 ----------------------------------------------------------------------•--------.----- -- --------- <br /> 50 -------------------------------------------------------------------------------- -- --- --- -- <br /> n <br /> 0 <br /> 25 •.......................................................................... ------------- -- <br /> N <br /> d p 0 <br /> 11/3/88 11/3/89 11/3/90 11/3191 11/2/92 11/2/93 11/2/94 11/2/95 11/1/96 11/1/97 <br /> OD Sample Date <br /> Arl_data.xls mw14 plot 11/24/98 <br />