Document JNyDzwjQpyznr4BDXKedBvpbO

AR226-2332 f? Charles J Zarzecki 04/11/2003 03:49 PM To: Catherine A Barton/AE/DuPont cc: Subject: W ash W orks Modeling Cathie, Not as easy as I thought it would be. To make a long story short - 1have to make 2 modeling runs and somehow merge the results. Hopefully, I'll have something by Monday, althogh not as confident as yesterday. Regards, Charlie Z. i EXD747791 f Charles J Zarzeeki 04/14/2003 09:26 AM To: Catherine A Barton/AE/DuPont cc: Subject: W W Depletion Modeling Gathie, The modeling results are in - and they are the same as previous modeling results for all practical purposes. The maximum predicted concentration for 2002 actuals at the property line is still 1.36 ug/m3. There are differences at the fourth decimal place. The travel distance is so short that plume depletion doesn't matter. Also, the particle sizes are very smalt, so it takes awhile for them to settle out. Oh, well. Chariie Z. E ID 747792