Document MGXKKEjrQMKQmqk2g2ebX37qj
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DuPont Modeling Methodology and Results
D ebbie M ulrooney D uPont E ngineering T e c h n o lo g y A pril 2 4 , 2 0 0 2
AR226-2279
Modeling Methodology
EPA's Industrial Source Complex 3 (ISC3) Model i
Followed procedures In EPA's Guideline on Air Quality Models (Appendix W)
BPIP model to evaluate building downwash
effects
CtisfJ
Terrain elevations imported from USGS electronic file
Receptor grid with 100-meter spacing
5n-site met data (1996)
2-fi>r J.Y
fi't/J - quip W-
Modeling Inputs
a?.
***w * ..-7-'^T?!
All inputs to the model were identical to information submitted pursuant to Consent Order: *v^
stack parameters emission rates buildings locations and heights scavenging coefficients
C F037996
/A ht^ fih'X ^-Q *n^
\,
eoot
o00
C F037997
Modeling Inputs - Stack Parameters
iiS S I
gpgm m yilSinilf R' S*8$?
1823A 815D 815D
1353A' Pre-Existing
614A 6I4A 781 1953 2365A Semiworks Application Semiworks Application Semiworks Application Semiworks Application
T7IME T6IFCE T6IZCE
164-5E 164-2E 163-E-26 163-E-ll 163-E-33
242 C1FSE R022EEF6 R022EEF86 R022EEF87 R022EEF89
662 644 699
652 658 231 232 216 242 274
442025 442084 442091
441920 441923 441952 441953 441960 441954 441787 442086 442069 442058 442063
4346847 4346835 4346836
4346767 4346756 4346776 4346766 4346788 4346741 4346744 4346624 4346627 4346634 4346635
150 59 63
70 68 93 81 60 114.5 110 47 49 49 49
1.33 1.5 18-1 ft
1.96 1.63 0.67 0.67 1.3 0.5 0.69 2.5 2.0 2.0 2.0
3,349 18,000
9,800 2,800 500 600 2,750 1,250 ' 1,000 8836 7540 1885 3770
40.2 169.8 21.2b
54.1 22.4 23.6 28.4 34.5 106.1 44.6 30.0 40.0 10.0 20.0
172 111 111
200 300 130 130 158 200 255 80 80 80 80
"Vent ID T61ZCE consists of 18 one-foot diameter vents, The flow rate given is the total for all 18 vents.
bThc velocity listed is the velocity calculated for one individual vent.
fiu 'n b
-r-M-c J/ S s j r t f S
Ts& S 'A a / Ja s fa ijj -- J f j u / -
S'kie ' d J f t '<-/ >'Ji
-* 9 JJuJyr --
ft}, 4 r *
Modeling Inputs - Emission Rates
W
H
DCft
CO
% > it f'jr its e ^ /c fa J k>
r'tott-i,
A t& jb
/^66 Jb* **ort <
C F037998
(A oJ- d* f k * k rrt fa
o p * (
Modeling Inputs - Particle Phase Scavenging Coefficients
Particle Phaise:
Particle D iam eter (m icron s)
0.2 0.4 0.75 2.0 4.0
Mass Fraction
0.538 0.267 0.035 0.127 0.033
Particle Density fe/cm 3)
2.2 2.2 2.2 2.2 2.2
p ^ rj-
v is / +fivrh. phxi&i -- d e / . rtMi ^
c/wtfJelg ,
7 h r * S $ C. cjt'fhr. /? rA p k m J b
-h f41'**?
. 77 i frt,^
Scavengin'kyJC4oc efficients
it_
iii/- hi*s 'h <Jie tAn^hb--.
L iq u id Precipitation (s'Vm m -h'1)
Frozen Precipitation (s'V m m -h'1)
t 'M . X / " X?C 3
G W ^/ki.
1.2x10'4
4x10
5 x 1 0 '*
1.67x10
4x10
1.33x10
1.3xl0'4
4.33x10
2.8xl0'4
9.33x10
EID631016
wOro w(O
Modeling Inputs - Vapor Phase
Scavenging Coefficients
Jf *-S*d ` -a,(c ,
X, ,?,,P0
u'UU.r-fJv <*/ o ^ ^ e ^ /P w .
;5*t
p h ' 0 1 2 4 6
t-4 A. r <uNfoA i'aA<A.v4*j
/'A CC
WK
Only one scavenging coefficient can be entered into the model cJu> ft /&*, ujs ffd Oi.f e, doijif /
4 .4 0 8 E -0 5 2 .3 1 1 E -0 2 -
/V". 'h .6 k -
5,Vi>s
Coefficients presented in consent order
3.1 0 6 E -0 2
submittal must be adjusted by dividing by ^
4 .0 6 7 E -0 2 4 .7 0 5 E -0 2
rainfall intensity
8 5 .1 9 0 E -0 2 10 5 .5 8 3 E -0 2 12 5 .915E -02
Worst-case coefficient (based on 1 mm/hr rain intensity) was used
14 6 .2 0 3 E -0 2
16 6 .457E -02
18 20
6 .6 8 5 E -0 2 6 .8 9 2 E -0 2
2.31 MO"2 1
hr
hr x-
= 6Axl O"6--
= 6.4M0"6
hr 3 6 0 0 1mm
s-mm
mm' hr
2 2 7 .0 8 2 E -0 2
24 7 .256E -02
2 6 7 .4 1 8 E -0 2
28 7 .570E -02
Orow 3 0 7 . 7 1 1 E - 0 2 COOoD
EID631017
Modeling Results - Predicted Ground
Level Concentrations A~] 13 ,^ .. .
C8 2000 Actual Emissions"1 Annual Average Vapor Concentrations (ug/m3)
t ^ a l a *>1 - hvto.
Ic.'JtfJ<MO.KvnMyr.,* vis tlL -4,
. . . rw<r^..v
.,
4348500
4348000-
4347500-
43470004346500-
- 5 ~ f '
* . tokvv, jm jV . .S'aA^f-v3
EID631018
4346000-
0*ow3
440000
440500
441000
441500
442000
442500
443000
443500
444000
444500
CMOoD
i^ d /d ss tf- _ r t r o /^5 - ,
Modeling Results - Predicted
E ID 6 3 1 0 1 9
Modeling Results - Predicted Vapor
c 1
1
I
(ft
0)
15
& Q
O(ft
&
0) Q 0 J((Cf0t
CL
C F038003 EXD631020
L ittle H o ck in g W ell F ield W a te rs h e d
I;
4% %
\t
C F038004 EID 6 3 1 0 2 1
445000
444000 '444500
443500
443000
442500
L ittle H ocking W a te rsh e d R e c e p to r G rid
3;
ri'sf
If
ItS
T
+ ++ + ++ + ++
4 44
444
4 4 4 4 4- 4 4 4 4 4 4 4 4 4 4 4 4 4 4 --4 4
44444444444 44444444444
4 4 H--I--1 - 4 4 4 4 4 4 4H--1--h H--t- 4 4 4 4 4 4444444-^-444
44444444444
44444444444 4444444 44 44 4 4-4444 4 - 4 4 4
4-4 4 4 4 4 4 4 4 4 4 444444-4444 44444444444 44444444444 44444444-1-44 4 4 4 4 4 4 4 4 444 4 4 4 4 4 --4 4 4 4 4 4 44 - 44 44 4 4 4 - 4 4 4 4 4-!- 4 4 4 4 4 44 4 4 4 44 4 4 4 4 4 4 4 4 4 + 4 4 -t- 4
*441000 " 441500 442000
9fnoor-
CF038005 E ID 6 3 1 0 2 2
L ittle H ocking W a te rsh e d D ep o sitio n R e su lts
. .-.r-z ii
tjs^ i i i ~ : .
Receptor grid area = 2.57 km2 Imported deposition rates from model into spreadsheet to calculate total deposition over
the watershed:
Particle Phase
Dry Deposition = 6,966 g/yr Wet Deposition = 12,484 g/yr Total Deposition -- 19,450 g/yr
H
HOUJ
Vapor Phase Wet Deposition = 1,642 g/yr
*T&Vo-i ^ `f f 'thsfi^c'.
CF038006
$ $ 1 A \s
ea^ - r^ -
/A
