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AR226-2153 pzrr' r"*--'-~ ^ U-(%,. DebbfeJMulrooney I.-.' 06/21/2001 02:16 PM To: cc: Subject: Catherine A Barton/AE/DuPont@DuPont Fayetlaville Results Cathie. Here is a summary of vapor phase modeling results for the four cases we've looked at so far-1 added all of the stack parameters for each case, so we know what we are loota'ng at. Case 4 is with the recent info that Rob sent Do you want me to go ahaad and run the Risk Generator for Case 4? I took a look at the LaPorte files that were generated for Input to the risk model. For each phase (vapor, particle and particle-bound) there is an average concentration listed in addition to the deposition rates. The average concentrations for the particle and particle-bound phase are less than those for the vapor phase, whfch I think tells me that these concentrations somehow take into account losses by deposition and depletion. (The mass balance thing that Charlie mentioned.) One other thing I may need to fix. I used the flow rates that Rob gave us in scfm units. If the stack really is 400 K (which Is what I seem to have In the model), the actm rate will be higher. Acfm is what is supposed to be used in the model. Although, in this case, using scfm is conservative. Foyettevllle ResuHs.xls Dabbie CAB000200 EID547049 Fayetteviile Modeling Results 1995 1996 1997 1996 1999 Case1 (ug/m3) Location i Case 2 (ug/m3) Location Case3 (ug/m3) Location 0.01298 0.01124 0.01050 0.01036 0.01115 696200E 38561OON 698400E 3858600N 696200E 38561OON 696050E 3856525N 696200E 3856300N 0.02189 : 0,02428 : 0.02S46 ; 0.01875 ; 0.02043 ; 696200E 38561OON 698400E 3858600N 698400E 3858600N 696050E 3856525N 698400E 3858600N 0.00824 0.00667 0,00685 0.00660 0.00733 696200E 38561OON 696400E 3856000N B96200E 38561OON 696200E 38561OON 696200E 3S56100N Case 4 (ug/m3) Location 0.13125 0.12863 0.12860 0.11887 0.12573 697500 3857725 697800 3858125 697800 3858025 697800 3858025 697800 3858025 Release Rate (g/s) Stack Flow Rate (scfm) Stack Velocity (m/s) Stack Height (ft) Building Height (ft) Stack Diameier (ft) Temperature (K) 0.07 10000 64,7 90 60 1 400 0.07 5000 32.3 90 60 1 400 0.07 15000 97.0 90 60 1 400 0.07 8500 55.0 85 55 1 400