Document wD9ED3oJb6GDQVLv10kG5jgQo

AR226-2153 btty' l- * ! a t- Debbie J Mulrooney | .T 05/21/2001 02:16 PM I To: Catherine A Barton/AE/DuPont@DuPont cc: Subject: Fayetteville Results Cathie, Here is a summary of vapor phase modeling results for the four cases we've looked at so far. I added all of the stack parameters for each case, so we know what we are looking at. Case 4 is with the recent info that Rob se n t Do you want me to go ahead and run the R isk Generator for Case 4? I took a look at the LaPorte files that were generated for input to the risk model. Fo r 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, which I think tells me that these concentrations som ehow take into account losses by deposition and depletion. (The m ass 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 acfm rate w ill be higher. Acfm is what is supposed to be used in the model. Although, in this case, using scfm is conservative. Fayetteville Resuits,xls Debbie CAB000200 EID 547049 Fayetteville Modeling Results 1995 1996 1997 1998 1999 Case 1 i CaseZ Case 3 (ug/m3) Location (uq/m3) Location (ug/m3) Location 0.01298 696200E 3856100N 0.01124 698400E 3858600N 0.01050 696200E 3856100N 0.01036 696050E 3856525N 0.01115 696200E 38563Q0N 0.02189 696200E : 3856100N 0,02428 698400E I 3858600N 0.02346 698400E I 3858600N 0.01875 696050E 3856525N 0.02043 698400E I 3858600N 0.00824 0.00667 0,00685 0.00660 0.00733 696200E 3856100N 6904OOE 3856000N 696200E 3856100N 696200E 3856100N 696200E 38561OON Case 4 (ug/m3) Location 0.13125 0.12803 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 Diameter (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 EID 547050 O O oN5 O H