DSHW-2013-003920 - 0901a0688038da50

Division of
Solid and Hazardous Waste
JUN 1 h 20)3
2013-003^20
June 14,2013
8200-FY14-027
Mr. Scott T. Anderson, Executive Secretary
State of Utah Department of Environmental Quality
Division of Solid and Hazardous Waste
195 N.1950 W.
P.O. Box 144880
Salt Lake City, Utah 84114-4880
Re: ATK Launch Systems-Promontory EPA ID number UTD009081357
Addendum Air Dispersion Modeling Report for Open Burning and Open
Detonation at ATK Launch Systems in Promontory, Utah
Dear Mr. Anderson:
Enclosed is the Addendum Air Dispersion Modeling Report for Open Burning and Open
Detonation (OB/OD) at ATK Launch Systems Inc. ("ATK") in Promontory, Utah. The
information from this modeling report is necessary to conduct the Human Health and
Ecological Risk Assessments for ATK's OB/OD operations.
Please contact me if you have any questions concerning this report. My telephone
number is [phone] or you can contact Blair Palmer at [phone].
Sincerely
George E. Gooch, Manager
Environmental Compliance
cc: JeffVandel
ADDENDUM
Division of
Solid and Hazardous Waste
JUN 1 4 2013
2O13-0D3J2D
AIR DISPERSION MODELING REPORT FOR
OPEN BURNING AND OPEN DETONATION AT
ATK LAUNCH SYSTEMS IN PROMONTORY, UTAH
Prepared for:
Utah Department of Environmental Quality
Division of Solid and Hazardous Waste
Prepared by:
ft
Shaw Envkonmental, Inc.
A CB&I Company
2790 Mosside Blvd
Monroeville, PA 15146
Project No. 146690
June 2013
Table of Contents
List of Tables iv
List of Attachments iv
List of Acronyms & Abbreviations v
1.0 Introduction 1
2.0 Description of Emission Source 3
2.1 Open Burn 3
2.2 Open Detonation 3
3.0 Emission Rates of Regulated Air Pollutants and Air Toxics 4
3.1 NAAQS Analysis 4
3.2 Air Toxics Analysis 5
4.0 Emission Source Parameters 9
4.1 Emission Rate 9
4.1.1 M-136 Stations 9
4.1.2 M-225 Stations 10
4.2 Release Height of Vapor Cloud 10
4.2.1 Open Burning 10
4.2.2 Open Detonation 11
4.3 Initial Dimensions of Vapor Cloud 11
4.3.1 Open Burning 11
4.3.2 Open Detonation 11
4.4 Other Source Parameters 12
4.4.1 M-136 Stations 12
4.4.2 M-225 Stations 12
4.5 Summary of AERMOD Modeling Parameters 12
4.5.1 M-136 Stations 13
4.5.2 M-225 Stations 15
5.0 Model Defaults and Assumptions 17
6.0 Meteorological Data 18
7.0 Receptor Grid Layout 19
8.0 Modeled Output 20
8.1 Maximum One-Hour Impact 20
8.2 Maximum Three-Hour and 24-Hour Impacts 20
8.3 Maximum Annual Impact 20
9.0 Compliance Demonstration with NAAQS and Air Toxic Standards 22
9.1 NAAQS Analysis 22
9.2 Air Toxics Analysis 23
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10.0 Development of Air Dispersion Factors for Risk Assessment 26
10.1 Receptor Locations 26
10.2 Pollutant Phases 27
10.3 One-Hour ADF for Concentration 30
10.4 Annual ADF for Concentration 30
10.5 Annual ADF for Deposition 31
10.6 Summary of ADFs 31
11.0 Conclusion 32
Attachments
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List of Tables
Table 3-1 Criteria Pollutants Considered in NAAQS Compliance Demonstration
Table 3-2 Maximum Emission Rates including Background Concentrations - Criteria Pollutants
Table 3-3 Acute and Chronic Air Toxic Screening Levels
Table 3-4 Maximum Emission Rates including Background Concentrations - Air Toxics
Table 4-1 M-136 Source Parameters
Table 4-2 M-136 Actual Emission Rates for Criteria Pollutants
Table 4-3 M-136 Actual Emission Rates for Air Toxics
Table 4-4 M-225 Source Parameters
Table 4-5 M-225 Actual Emission Rates for Criteria Pollutants
Table 4-6 M-225 Actual Emission Rates for Air Toxics
Table 9-1 Results of Cumulative Impact for M-136 and M-225 - Criteria Pollutants
Table 9-2 Results of Cumulative Impact for M-136 and M-225 - Acute One-Hour Air Toxics
Table 9-3 Results of Cumulative Impact for M-136 and M-225 - Chronic 24-Hour Air Toxics
Table 10-1 Particle Distribution Data
List of Attachments
Attachment 1 Example for the Cloud Height Calculation
Attachment 2 Summary of Screened Hours
Attachment 3 Detailed Modeling Results
Attachment 4 Modeling Inputs/Outputs
Attachment 5 Summary of ADFs for the Risk Assessment
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List of Acronyms & Abbreviations
u.g/m3 micrograms per cubic meter
ADFs air dispersion factors
AERMOD American Meteorological Society/USEPA Regulatory Modeling System
ATK ATK Launch Systems
MST Mountain Standard Time
g/s grams per second
HHRAP Human Health Risk Assessment Protocol
km kilometers
lbs pounds
m meter
m2 square meter
MEI maximum exposed individual
min minute
mph miles per hour
NAAQS National Ambient Air Quality Standards
NO2 nitrogen dioxide
OB open burning
OBODM Open Burn/Open Detonation Model
OD open detonation
PG Pasquill-Gifford
PM particulate matter
ppb parts per billion
sec second
SO2 sulfur dioxide
TSLs toxic screening levels
UDSHW Utah Department of Environmental Quality, Division of Solid and Hazardous Waste
USEPA U.S. Environmental Protection Agency
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1.0 Introduction
ATK Launch Systems (ATK), located 30 miles west of Brigham City, Utah, currently operates
open burning (OB) and open detonation (OD) units for the treatment of hazardous waste
propellants and propellant-contaminated materials. These treatment units are M-136 and M-225
and are subject to Resource Conservation and Recovery Act, 40 CFR 264, Subpart X permitting
requirements for miscellaneous treatment units.
The Utah Department of Environmental Quality, Division of Solid and Hazardous Waste
(UDSHW) required ATK to conduct human health and ecological risk assessments in support of
a new Subpart X permit application. Before the human health and ecological risk assessments
can be conducted, an air dispersion modeling analysis must be performed to evaluate the air
quality impact of the M-136 and M-225 treatment units. The results of the air dispersion
modeling analysis will be entered into human health and ecological risk assessment models to
determine the risk from the ATK OB/OD treatment units.
ATK submitted a preliminary air dispersion modeling draft report for the OB/OD treatment units
in March 2012. UDSHW made several comments on this report in a letter dated May 29, 2012.
The preliminary modeling was conducted using the Open Burn/Open Detonation Model
(OBODM) per approved protocol. OBODM is specifically designed to predict the air quality
impact of OB and OD treatment of obsolete weapons, solid rocket propellants, and associated
manufacturing wastes. The OB and OD treatment of waste propellants and propellant-
contaminated materials can be classified as instantaneous events for OD treatment and as quasi-
continuous events for OB treatment. The model is also designed to use either empirical emission
factors such as those derived in the Dugway Proving Ground Bang Box™ or emissions predicted
by a products of combustion model. OBODM calculates peak air concentration, time-weighted
air concentrations, and dosage (time-integrated concentration) for OB and OD releases. It can
also consider the effects on concentration and dosage of the gravitational settling and deposition
of particulates.
However, OBODM has several limitations which constrain the modeling in this application. For
example, OBODM can handle only 100 receptors at a time, cannot predict deposition in complex
terrain, and uses older algorithms for downwind dispersion of emitted pollutants.
To overcome these limitations, ATK proposed a hybrid approach for the air modeling using the
OBODM with the American Meteorological Society/U.S. Environmental Protection Agency
(USEPA) Regulatory Modeling System (AERMOD) model, which is the USEPA's preferred
dispersion model for short range transport (up to 50 kilometers [km]). OBODM has two distinct
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parts. The first part simulates the OB and OD events and generates initial parameters of the
emission cloud (emission rate, cloud height, cloud diameter), and the second part is the
downwind dispersion of the emission cloud. The main limitation of OBODM is in the second
part (i.e., dispersion). The downwind dispersion is better handled by AERMOD which has
practically no limitation on number of receptors, can easily handle complex terrain, and handles
dispersion of emission clouds based on state-of-the-art understanding of atmospheric turbulence.
Thus, the revised air quality assessment was conducted using this hybrid approach based on the
emission rates and initial source parameters from OBODM and using these parameters in
AERMOD to predict downwind dispersion and deposition. This report describes the details of
this hybrid modeling approach.
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2.0 Description of Emission Source
The two activities in the facility are OB and OD. OB treatment is considered a quasi-continuous
source because the treatment event is usually complete within one hour. OD is considered an
instantaneous source because treatment is completed within milliseconds. The approach to
modeling these two types of events was as follows.
2.1 Open Bum
OB results in combustion of the energetics and rapid rise of the hot combustion products due to
buoyancy until a final height is reached. At this point, the emission cloud has no upward
momentum and starts to disperse downwind. This event was simulated as an elevated volume
source with the stack height equal to the final cloud height predicted from OBODM. Details of
source parameters are described in Section 4.0.
2.2 Open Detonation
OD results in instantaneous combustion and immediate rise of the emission cloud to a final
height. The cloud height is based on the reactive waste weight, wind speed, and atmospheric
stability. Once elevated, this cloud disperses downwind. This event was simulated as an
elevated volume source. Details of source parameters are described in Section 4.0.
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3.0 Emission Rates of Regulated Air Pollutants and Air Toxics
The objective of the air quality analysis was to determine compliance with all applicable
National Ambient Air Quality Standards (NAAQS) and air toxics. The NAAQS and air toxics
modeling pollutants and corresponding emission rates are described below.
3.1 NAAQS Analysis
The criteria pollutants considered for NAAQS analysis, the averaging time, and design values
are shown in Table 3-1.
Table 3-1: Criteria Pollutants Considered in NAAQS Compliance Demonstration
Criteria
Pollutant
NAAQS
averaging time
Design
Concentration Method of Determination of Design Value
PM-10 24-Hour 150 ug/m3 Sixth highest of 5 years of meteorological data
PM-2.5 24-Hour 35 (jg/m3 Average of first highest of 5 years of meteorological data
PM-2.5 Annual 12 ug/m3 Average of first highest of 5 years of meteorological data
S02 1-Hour 75 ppb
(195 ug/m3)
Five-year average of the 99th percentile (4th highest) of the annual
distribution of daily maximum 1-hour average concentrations
SO2 3-Hour 1,300 ug/m3 Five-year average of 2nd highest (not to be exceeded once per year)
NO2 1-Hour 100 ppb
(189 ug/m3)
Five-year average of the 98th percentile (8th highest) of the annual
distribution of daily maximum 1-hour average concentrations
NO2 Annual 100 ug/m3 Maximum over 5 years of meteorological data
Notes: Carbon monoxide and lead NAAQS were not included because previous modeling showed compliance with NAAQS.
PM = Particulate matter.
NO2 = Nitrogen dioxide.
SO2 - Sulfur dioxide,
ppb = Parts per billion.
ji/g/m3 = Micrograms per cubic meter.
Although each pollutant and averaging period has its own method to determine the design value,
for this analysis, each maximum one-hour impact was averaged over the five-year period to
obtain an average maximum one-hour impact for NAAQS analysis for all pollutants except
PM-10 and annual NO2. This methodology is conservative for NAAQS. For PM-10 and annual
NO2, the maximum impact over the five-year period of one-hour and annual average
concentrations were considered, respectively.
The NAAQS modeling used emission rates from the preliminary modeling. The emission factors
are maximum values and include background concentrations expressed in pound of pollutant per
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pound of reactive waste referenced from Table 2-5 of the 2012 TetraTech Modeling Report. The
emission rates for NAAQS are shown Table 3-2.
Table 3-2: Maximum Emission Rates including Background Concentrations - Criteria Pollutants
Pollutant
PM-10
PM-2.5
S02
NO2
Maximum Emission Rate
(lb/lb reactive waste)
0.12
0.06
0.0005
0.0064
Reference: 2012 TetraTech Modeling Report, Table 2-5.
3.2 Air Toxics Analysis
Air toxics included in the preliminary modeling dated March 2012 were compared to respective
Utah toxic screening levels (TSLs). The acute toxics and corresponding TSLs considered are
listed in Table 3-18 of the March 2012 modeling report. The maximum one-hour concentrations
were averaged over the five-year period and compared to the acute TSLs. The chronic air toxics
and corresponding TSLs are listed in Tables 3-35 and 3-52 of the preliminary modeling report
dated March 2012. The maximum 24-hour concentrations were averaged over the five-year
period and compared with the chronic TSLs. The acute one-hour and chronic 24-hour TSLs are
shown in Table 3-3.
Table 3-3: Acute and Chronic Air Toxic Screening Levels
Type of Air Toxic Pollutant Utah TSL Value
(ug/m3)
Acute (1-Hour) Air Toxic
Isophorone
Formaldehyde
Hydrogen Chloride
Hydrogen Cyanide
1,2,4,-Trichlororbenzene
2,826
37
298
520
3,71"
Chronic (24-Hour) Air Toxic
1,4-Dichlorobenzene
2,4-Dinitrotoluene
o-Toluidine
Phenol
CI2
1,1,2-Trichloroethane
1,3-Butadiene
2,004
292
642
48
1,819
49
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Type of Air Toxic Pollutant Utah TSL Value
(ug/m3)
1,4-Dioxane
Acrylonitrile
Benzene
Bromoform
Carbon Tetrachloride
Chlorobenzene
Chloroform
cis-1,3-Dichioropropene
Cumene
Styrene
Toluene
Vinyl Chloride
Antimony
Arsenic
Cadmium
Chromium
Cobalt
Manganese
Mercury
Nickel
Phosphorus
Selenium
2,402
48
53
172
350
1,535
1,628
151
8,193
2,840
2,512
28
17
0.33
0.02
0.11
0.77
6.7
0.33
1.1'
3.3
3.7
The air toxics modeling used emission factors from the preliminary modeling. The emission
factors are the maximum emission rate which includes background concentrations expressed in
pound of pollutant per pound reactive waste. The emission rates for all air toxics are shown
Table 3-4.
Table 3-4: Maximum Emission Rates including Background Concentrations - Air Toxics
Type of Air Toxic Pollutant Maximum Emission Rate
''B (lb/lb reactive waste) '••:>•
Acute (1-Hour) Air Toxics
Isophorone 5.50E-07
Formaldehyde 4.70E-05
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Type of Air Toxic Pollutant Maximum Emission Rate
(lb/lb reactive waste)
Hydrogen Chloride
Hydrogen Cyanide
1,2,4,-Trichlororbenzene
1.80E-02
2.20E-05
1.30E-06
Chronic (24-Hour) Air Toxics
1,4-Dichlorobenzene
2,4-Dinitrotoluene
o-Toluidine
Phenol
Cb
1,1,2-Trichloroethane
1,3-Butadiene
1,4-Dioxane
Acrylonitrile
Benzene
Bromoform
Carbon Tetrachloride
Chlorobenzene
Chloroform
cis-1,3-Dichloropropene
Cumene
Styrene
Toluene
Vinyl Chloride
Antimony
Arsenic
Cadmium
Chromium
Cobalt
Manganese
Mercury
Nickel
Phosphorus
Selenium
7.30E-07
5.50E-07
7.00E-06
2.40E-06
1.20E-02
7.30E-07
2.40E-05
6.40E-07
1.60E-05
4.70E-05
1.30E-06
1.50E-05
2.50E-06
6.10E-06
1.30E-06
4.20E-07
9.90E-07
1.90E-05
7.60E-06
2.90E-05
5.50E-07
6.10E-07
2.00E-05
6.10E-07
9.40E-05
7.40E-08
5.80E-05
1.10E-04
1.60E-06
Reference: 2012 TetraTech Modeling Report, Table 2-5.
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To determine the emission rates used in AERMOD (in grams per second [g/s]), the maximum
emission factors were multiplied by the reactive waste weight for each scenario described in
Section 4.0. The emission rates used in AERMOD for each scenario are shown in Section 4.0.
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4.0 Emission Source Parameters
Both the OB and OD events were modeled as elevated volume sources. The source parameters
required for dispersion of volume sources are:
• Emission rate
• Release height of vapor cloud
• Initial horizontal and vertical dimensions of the vapor cloud
The methodology for determination of these source parameters was based on several discussions
with UDSHW as described in this section.
4.1 Emission Rate
Emission rates were estimated based on quantity of reactive waste in OB/OD events and the
emission factors used in previous modeling referenced from Table 2-5 of the March 2012
modeling report. Modeling to assess ambient air quality impacts was conducted using the
estimated actual emission rates for each scenario. To reduce the number of required model runs,
the emission rates for a single pollutant (i.e., PM-2.5) were input to the model. The single
pollutant modeling results were then applied to the other pollutants that are part of the impact
analysis by scaling the modeled results by the ratio of the desired pollutant emission rate to the
modeled emission rate. However, modeling in support of the risk assessment was conducted at a
unit emission rate of 1 g/s to allow for application of pollutant-specific emission rates within the
risk assessment software.
The reactive waste quantities for each of the scenarios were based on the desired permit limits
which are listed below.
4.1.1 M-136 Stations
M-136 has 14 burn stations (1 through 14) and any one of the following alternative and mutually
exclusive scenarios could occur in these stations:
Scenario M-136-A
• AI: OB in six of Burn Stations 1 through 12 at 16,000 pounds (lbs) in each station
totaling to 96,000 lbs reactive waste weight per event
• A2: 10,000 lbs reactive waste weight per event in Burn Station 13
• A3: 16,000 lbs reactive waste weight per event in Burn Station 14
I
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Scenario M-136-B
• B: OB of 125,000 lbs of large rocket motors in Station 14
Scenario M-136-C
• C: OD of 600 lbs reactive waste in Stations 13 and 14 each, totaling 1,200 lbs
reactive waste weight per event
4.1.2 M-225 Stations
M-225 has four burn stations (1 through 4) and any one of the following alternative and mutually
exclusive scenarios could occur in these stations:
Scenario M-225-A
• A: OB of 1,125 lbs of reactive waste in each of the Burn Stations 1 through 4 for a
total of 4,500 lbs reactive waste weight per event
Scenario M-225-B
• B: OD of 600 lbs of reactive waste in Station 1
4.2 Release Height of Vapor Cloud
4.2.1 Open Burning
OB results in combustion of the energetics and rapid rise of the hot combustion products due to
buoyancy until a final height is reached. At this point, the emission cloud has no upward
momentum and starts to disperse downwind. This event was simulated as an elevated volume
source with the release height equal to the final cloud height predicted from OBODM.
Based on several discussions with UDSHW and its consultant, the following approach was used
for determination of cloud heights for OB events.
All of the unrestricted hours (i.e., the hours that meet the operating restriction described in
Section 5.0 were grouped based on wind speed and stability condition. The wind speeds were
grouped in four ranges as identified below:
• Category 0: 3.0 miles per hour (mph) - 5.0 mph
• Category 1: 5.0 mph - 7.5 mph
• Category 2: 7.5 mph - 10.0 mph
• Category 3: 10.0 mph - 12.5 mph
• Category 4: 12.5 mph - 15 mph
Atmospheric stabilities were grouped in six Pasquill-Gifford (PG) atmospheric stability classes
for each of the hours in each of the wind speed categories listed above.
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The OBODM was used to determine the vapor cloud height for each combination of the PG
atmospheric stability class and wind speed categories. The vapor cloud heights were determined
for the lower threshold, the higher threshold, and midpoint for each wind speed category. To
ensure a conservative impact assessment, the minimum cloud height out of these three wind
speeds were considered for each combination of atmospheric stability and wind speed category.
Attachment 1 shows an example for the cloud height calculation.
The procedure outlined here for determining the vapor cloud heights specific to meteorological
conditions was conducted for each of the scenarios proposed for representing the OB/OD events.
In the case of scenarios that consider simultaneous events at multiple burn stations, only one
representative burn station was modeled in OBODM for each scenario. The resulting vapor
cloud height was then applied to each of the other identical burn stations for that scenario.
4.2.2 Open Detonation
The same procedure described for OB was used for determination of vapor cloud height for OD
using the OBODM.
4.3 Initial Dimensions of Vapor Cloud
4.3.1 Open Burning
During rapid rise of the cloud from the OB, atmospheric air is entrained and the dimension of the
cloud increases. Based on videos of the open burning events, the final dimensions of the cloud at
final plume height are typically four to eight times larger than the dimension of the burn pans.
As a conservative estimate, the cloud diameter was based on four times the equivalent diameter
of the burn pans. Because the burn stations have multiple adjacent burn pans, the equivalent
diameter was based on the total area covered by the reactive waste. It is assumed that the vapor
cloud plume is a sphere.
Per AERMOD guidance, the initial vertical and horizontal dimensions of an elevated volume
source, such as the vapor cloud, were calculated by dividing the initial cloud diameter (i.e., four
times equivalent diameter covered by reactive waste on burn pans) by a factor of 4.3.
4.3.2 Open Detonation
The initial dimension of the vapor cloud was obtained directly from the OBODM for each
combination of wind speed category and atmospheric stability. Per AERMOD guidance, the
initial vertical and horizontal dimensions of an elevated volume source such as the vapor cloud
were calculated by dividing the initial vapor cloud diameter by a factor of 4.3.
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4.4 Other Source Parameters
4.4.1 M-136 Stations
Burn Stations 1 through 12 are clustered within 100 meters of each other. Six of the 12 stations
located closest to the western property line (Stations 1, 4, 7, 8, 10, and 11) were modeled as six
separate sources. Burn Stations 13 and 14 were modeled separately.
From previous modeling and from burn information provided by the facility, the following
assumptions were made:
• Burn Stations 1 through 12 each consist of four adjacent burn pans. The average
dimension of each burn pan is 8 feet by 13 feet, and the burn pan layout per station is
approximated as an area of 16 feet by 26 feet.
• Burn Station 13 consists of two adjacent burn pans. The average dimension of each
pan is 6 feet by 9 feet, and the burn pan layout for this station is approximated as an
area of 9 feet by 12 feet.
• Burn Station 14 consists of four adjacent burn pans. The average dimension of each
burn pan is 8 feet by 13 feet, and the burn pan layout for this station is approximated
as an area of 16 feet by 26 feet.
• The dimension of the rocket motor burn area at Burn Station 14 is assumed to be
5 feet by 50 feet.
• The height of burn stations = 1.0 meter.
• The detonation will be started at ground level.
4.4.2 M-225 Stations
Burn Stations 1 through 4 are clustered within 100 meters and were modeled as a single source
located approximately at the center of the cluster. The OD pit was modeled separately. From
previous modeling and from burn information provided by the facility, the following
assumptions were made:
• Burn Stations 1 through 4 each consist of one burn pan, having an average pan
dimension of 6 feet by 17 feet.
• The height of burn stations = 1.0 meter.
• The detonation will be started at ground level.
4.5 Summary of AERMOD Modeling Parameters
Based on the information, a summary of the actual parameters used for modeling are described
below.
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4.5.1 M-136 Stations
The source parameters for M-136 are shown in Table 4-1.
Table 4-1: M-136 Source Parameters
Parameter M-136-A1 M-136-A2 M-136-A3 M-136B M-136-C
Daily Quantity Burned
(lb reactive waste) 96,000 10,000 16,000 125,000 1,200
Annual Quantity Burned
(lb reactive waste) 6,720,000 840,000 840,000 1,500,000 100,000
Burn Duration 15-45 min 15-45 min 15-45 min 15-45 min 5 sec
Burn Pan Area (m2) 38.65 10.03 38.65 23.23
Burn Pan Equivalent Diameter (m) 7.01 3.57 7.01 5.44
Volume Source Diameter (m) 28.06 14.3 28.06 21.75 19.51
Initial Sigma Y (m) 6.53 3.32 i.53 5.06 4.54
Initial Sigma Z (m) 6.53 3.32 6.53 5.06 4.54
Release height (m) 238 219.3 238 297 189.7
Notes: min = Minute,
sec = Seconds.
m2 = Square meter,
m = Meter.
To determine the emission rates used in AERMOD, the maximum emission factors described in
Section 4.0 were multiplied by the daily quantity burned for each scenario. The emission rates
for NAAQS and air toxics are shown in Tables 4-2 and 4-3, respectively.
Table 4-2: M-136 Actual Emission Rates for Criteria Pollutants
Pollutant
PM-10
PM-2.5
S02
NO2
Emission Rate (g/s)
M-136-A1
1,451.5
725.8
6.0
77.4
M-136-A2
151.2
75.6
0.6
8.1
M-136-A3
241.9
121.0
1.0
12.9
M-136-B
1,890.0
945.0
7.9
100.8
M-136-C
18.1
9.1
0.1
1.0
Table 4-3: M-136 Actual Emission Rates for Air Toxics
Pollutant
Emission Rate
(g/s)
• M-136-A
Isophorone 8.45E-03
Formaldehyde 7.22E-01
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Pollutant
Hydrogen Chloride
Hydrogen Cyanide
1,2,4,-Trichlororbenzene
1,4-Dichlorobenzene2
2,4-Dinitrotoluene
o-Toluidine
Phenol
CI2
1,1,2-Trichloroethane
1,3-Butadiene
1,4-Dioxane
Acrylonitrile
Benzene
Bromoform
Carbon Tetrachloride
Chlorobenzene
Chloroform
cis-1,3-Dichloropropene
Cumene
Styrene
Toluene
Vinyl Chloride
Antimony
Arsenic
Cadmium
Chromium
Cobalt
Manganese
Mercury
Nickel
Phosphorus
Selenium
Emission Rate
(g/s)
M-136-A
2.77E+02
3.38E-01
2.00E-02
1.12E-02
8.45E-03
1.08E-01
3.69E-02
1.84E+02
1.12E-02
3.69E-01
9.84E-03
2.46E-01
7.22E-01
2.00E-02
2.31 E-01
3.84E-02
9.38E-02
2.00E-02
6.46E-03
1.52E-02
2.92E-01
1.17E-01
4.46E-01
8.45E-03
9.38E-03
3.07E-01
9.38E-03
1.44E+00
1.14E-03
8.92E-01
1.69E+00
2.46E-02
Note: Air Toxics modeling was only completed for Scenario M-136-A because that scenario was determined to have the greatest impact.
Shaw Environmental, Inc. 14 Addendum to Air Quality Modeling Report
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4.5.2 M-225 Stations
The source parameters for scenarios M-225 are shown in Table 4-4.
Table 4-4: M-225 Source Parameters
Parameter
Daily Quantity Burned (lb reactive waste)
Annual Quantity Burned (lb reactive waste)
Burn Duration
Burn Pan Area (m2)
Burn Pan Equivalent Diameter (m)
Volume Source Diameter (m)
Initial Sigma Y (m)
Initial Sigma Z (m)
Release height (m)
M-22S-A
4,500
55,000
15-45 min
9.48
3.47
13.89
3.23
3.23
148.8
M-225-B
600
10,000
5 sec
19.51
4.54
4.54
189.7
To determine the emission rates used in AERMOD, the maximum emission factors described in
Section 3.0 were multiplied by the daily quantity burned for each scenario. The emission rates
for NAAQS and air toxics are shown in Tables 4-5 and 4-6, respectively.
Table 4-5: M-225 Actual Emission Rates for Criteria Pollutants
Pollutant
PM-10
PM-2.5
S02
NO2
Emission Rate (g/s)
M-225-A
68.0
34.0
0.3
3.6
M-225-B
9.1
4.5
0.04
0.5
Table 4-6: M-225 Actual Emission Rates for Air Toxics
Pollutant
Emission Rate
(g/s)
M-225-A
Isophorone 3.12E-04
Formaldehyde 2.66E-02
Hydrogen Chloride 1.02E+01
Hydrogen Cyanide 1.25E-02
1,2,4,-Trichlororbenzene 7.37E-04
Shaw Environmental, Inc. 15 Addendum to Air Quality Modeling Report
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Pollutant
1,4-Dichlorobenzene
2,4-Dinitrotoluene
o-Toluidine
Phenol
CI2
1,1,2-Trichloroethane
1,3-Butadiene
1,4-Dioxane
Acrylonitrile
Benzene
Bromoform
Carbon Tetrachloride
Chlorobenzene
Chloroform
cis-1,3-Dichloropropene
Cumene
Styrene
Toluene
Vinyl Chloride
Antimony
Arsenic
Cadmium
Chromium
Cobalt
Manganese
Mercury
Nickel
Phosphorus
Selenium
Emission Rate
• (g/s)
M-225-A
4.14E-04
3.12E-04
3.97E-03
1.36E-03
6.80E+00
4.14E-04
1.36E-02
3.63E-04
9.07E-03
2.66E-02
7.37E-04
8.51 E-03
1.42E-03
3.46E-03
7.37E-04
2.38E-04
5.61 E-04
1.08E-02
4.31 E-03
1.64E-02
3.12E-04
3.46E-04
1.13E-02
3.46E-04
5.33E-02
4.20E-05
3.29E-02
6.24E-02
9.07E-04
Note: Air Toxics modeling was only completed for Scenario M-225-A because that scenario was determined to have the greatest impact.
Shaw Environmental, Inc 16 Addendum to Air Quality Modeling Report
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5.0 Model Defaults and Assumptions
The latest version of USEPA's AERMOD model (version 12345) was used for estimating the
impact of the vapor cloud on downwind receptors. To ensure the AERMOD results represent a
significant refinement, the following restrictions were considered for modeling:
• The events will occur only between the hours 9:00 a.m. Mountain Standard Time
(MST) and 6:00 p.m. MST
• The wind speed during the events will be between 3 mph and 15 mph
• The Clearing Index during the events will be 500 or higher
Five years of meteorological data were screened for potential operating hours considering these
restrictions. The summary of screened hours is shown in Attachment 2. These hours were
modeled for the ambient impact assessment and the risk assessment.
Shaw Environmental. Inc. 17 Addendum to Air Quality Modeling Report
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6.0 Meteorological Data
Five years (1997 to 2001) of on-site meteorological data obtained from the site were used in the
preliminary modeling. The same meteorological data were used after reprocessing the data for
AERMOD using the latest version of the preprocessor, AERMET (version 12345). Non-urban
(i.e., rural) land use determined from previous modeling was used in AERMET.
The five years (1997 through 2001) of on-site hourly meteorological data were obtained from the
site in CD-144 format and included wind speed, wind direction, temperature, and barometric
pressure monitored at the site along with concurrent ceiling height and opaque cloud cover from
Hill Air Force Base. Twice daily upper air data for Salt Lake City was obtained in Forecast
Systems Laboratory format from the National Oceanic and Atmospheric Administration, Earth
System Research Laboratory Radiosonde Database. The hourly surface meteorological
observations were then used along with the twice daily Salt Lake City upper air data in the
AERMET pre-preprocessor to develop surface and vertical profile meteorological databases for
use in AERMOD. This processing was conducted in accordance with the latest USEPA
AERMOD Implementation Guide dated March 19, 2009. Refer to the March 2013 protocol for
details on the land use and surface characteristics used in processing the meteorological data.
Shaw Environmental, Inc 18 Addendum to Air Quality Modeling Report
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7.0 Receptor Grid Layout
For NAAQS and air toxics analysis, an off-site receptor grid was used to determine the
maximum off-site ground level concentrations. The layout of the receptors was as follows:
Discrete receptors were placed along the property fence line at 100-meter intervals. A Cartesian
receptor grid starting from the property line extended up to 10 km in all directions. This
Cartesian receptor grid was spaced at 100-meter intervals to a distance of 3 km from the facility
and at 500-meter intervals between 3 km and 10 km from the facility.
The terrain data for each receptor were processed using AERMOD's terrain data preprocessor,
AERMAP. Using AERMAP, the base elevation and hill height scale values were determined for
each receptor. The digital terrain data were obtained from 1 arc second National Elevation
Dataset.
The receptor grids used in the modeling conducted in support of the risk assessment are
discussed in detail in Section 10.1 and include the off-site receptor grid described above.
Shaw Environmental, Inc. 19 Addendum to Air Quality Modeling Report
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8.0 Modeled Output
The OB and OD events were considered for only one hour per day. NAAQS compliance was
demonstrated by comparing the design modeled concentration for all pollutants and averaging
times with the respective NAAQS. The methodologies for one-hour, three-hour, 24-hour, and
annual impact are described as follows.
8.1 Maximum One-Hour Impact
AERMOD was used to calculate the maximum one-hour average impact over each year of five
years of meteorological data covering all of the unrestricted hours of operation. This is the
maximum one-hour average concentration for the OB/OD operations in any day of the year for
each of the five years. These five one-hour average impacts for the five years were averaged to
obtain the five-year average maximum one-hour impact.
8.2 Maximum Three-Hour and 24-Hour Impacts
Because only one hour of OB/OD events will occur in any day (and there is no impact during the
remainder of the day), the maximum values of three-hour and 24-hour averages were also based
on the one-hour maximum value. For example, the maximum 24-hour average concentration in
any year was calculated by dividing the maximum one-hour concentration for that year by a
factor of 24 as shown below:
Max^r
Max24-hr=—24—
Where:
Max24.hr = Maximum 24-hour average concentration in ug/m3
Maxi-hr = Maximum one-hour average concentration in u,g/m3
Similarly, for the maximum three-hour concentrations, the maximum one-hour average is
divided by three. The maximum three-hour and 24-hour averages for each of the five years were
averaged to obtain the five-year average value for each short-term averaging time.
8.3 Maximum Annual Impact
The annual total OB and OD quantities are restricted by permitted levels. To account for this
limitation on annual OB/OD quantities, the following calculation was used:
Shaw Environmental, Inc 20 Addendum to Air Quality Modeling Report
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Where:
Max annual
-2
= Maximum annual average concentration in ug/m
Qannual Annual quantity of reactive waste in OB/OD (lbs)
Qdaily Daily quantity of reactive waste in OB/OD (lbs)
1HR, -max Maximum one-hour impact based on daily reactive waste quantity
8760 Number of hours per year
Note: The term [Qannuai/Qdaiiy] represents the total number of days per year the OB/OD
events can occur to reach the annual permitted quantities.
This assumes that for each hour the OB/OD operations were carried out to meet the annual
quantity, the impact was the same as the maximum one-hour determined previously. This is a
conservative assumption.
Each year of maximum one-hour average impact obtained from AERMOD was used to calculate
the maximum annual impact for each year. The five maximum annual impacts were averaged to
obtain the five-year average annual impact.
The permitted annual reactive waste quantities for the OB/OD operations are as follows. These
quantities were used as the "Qannual" in the above equation to calculate the maximum annual
average concentrations.
M136:
Scenario AI - Open Burn in Stations 1 throughl2: 6,720,000 lbs
Scenario A2 - Open Burn in Station 13: 840,000 lbs
Scenario A3 - Open Burn in Station 14: 840,000 lbs
Scenario B - Large Rocket Motor in Station 14: 1,500,000 lbs
Scenario C - Open Detonation in Stations 13 and 14: 100,000 lbs
M225:
Scenario A - Open Burn in Stations 1 through 4:
Scenario B - Open Detonation in Station 1:
55,000 lbs
10,000 lbs
Shaw Environmental, Inc 21 Addendum to Air Quality Modeling Report
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9.0 Compliance Demonstration with NAAQS and Air Toxic Standards
The objective of the modeling was to determine compliance with all applicable NAAQS and air
toxics. The NAAQS and air toxics modeling results are described as follows:
9.1 NAAQS Analysis
NAAQS compliance was demonstrated by comparing the design modeled concentration for all
pollutants and averaging times with the respective NAAQS. No background concentrations were
added to the design modeled concentration because, as mentioned in Section 3.0, the emission
factors used for the modeling included background concentration. For all averaging times and
pollutants, scenarios M-136A and M-225-A had the highest impact. Details of all modeling
results are shown in Attachment 3. The design modeled cumulative results are shown in Table 9-1.
Table 9-1: Results of Cumulative Impact for M-136 and M-225 - Criteria Pollutants
Pollutant Averaging
Time Group Rank
Design
Model
Cone.
(ugmi3)
NAAQS
(Mg/m3) % of NAAQS Exceedance of
NAAQS? (Y/N)
M136 A 1ST 25.00 35 71.44% No
24-HR M225 A 1ST 1.48 35 4.23% No
PM-2.5 Total 1ST 26.49 35 75.67% No
M136 A 1ST 5.75 12 47.95% No
Annual M225 A 1ST 0.05 12 0.44% No
Total 1ST 5.81 12 48.39% No
M136 A 1ST 57.14 150 38.10% No
PM-10 24-HR M225 A 1ST 3.65 150 2.43% No
Total 1ST 60.79 150 40.53% No
M136_A 1ST 64.01 189 33.87% No
1-HR M225_A 1ST 3.79 189 2.01% No
N02
Total 1ST 67.80 189 35.87% No
M136 A 1ST 0.70 100 0.70% No
SO2
Annual
1-HR
3-HR
M225_A
Total
M136_A
M225_A
Total
M136_A
M225_A
Total
1ST
1ST
1ST
1ST
1ST
1ST
1ST
1ST
0.007
0.71
5.00
0.30
5.30
1.67
0.10
1.77
100
100
195
195
195
1300
1300
1300
0.007%
0.71%
2.56%
0.15%
2.72%
0.13%
0.01%
0.14%
No
No
No
No
No
No
No
No
Shaw Environmental, Inc 22 Addendum to Air Quality Modeling Report
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Pollutant Averaging
Time Group Rank
Design
Model
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS Exceedance of
NAAQS? (Y/N)
CO
1-HR
8-HR
M136 A 1ST 64.01 40,000
M225 A 1ST 3.79 40,000
Total 1ST 67.80 40,000
M136 A 1ST 8.00 10,000
M225_A
Total
1ST
1ST
0.47
8.48
10,000
10,000
0.16%
0.01%
0.17%
0.08%
0.005%
0.08%
No
No
No
No
No
No
The results for all pollutants and averaging times show compliance with NAAQS. Therefore, no
additional modeling was required. A flash drive of all modeling inputs and outputs is provided
in Attachment 4.
9.2 Air Toxics Analysis
Air toxics results were compared with short-term and long-term TSLs. Results of the NAAQS
analysis indicated that scenarios M-136-A and M-225-A had the highest impact. Therefore, only
these scenarios were considered for the air toxics analysis. The design modeled cumulative
results for the acute and chronic air toxics are shown in Tables 9-2 and 9-3, respectively.
Shaw Environmental, Inc 23 Addendum to Air Quality Modeling Report
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Table 9-2: Results of Cumulative Impact for M-136 and M-225 - Acute One-Hour Air Toxics
Air Toxic
Acute 1-hr
TSL Value
ug/m3
Scenario M136A
1-HR Cone.
ug/m3
% ofTSL
Exceed
TSL?
(Y/N)
Scenario M225A
1-HR Cone.
ug/m3
% ofTSL
Exceed
TSL?
(Y/N)
Total (M136Aand M225A)
1-HR
Cone.
ug/m3
%of
TSL
Exceed TSL?
(Y/N)
Isophorone 2,826 0.006 0.0002% No 0.0003 0.00001% No 0.006 0.0002%
Formaldehyde 37 0.470 1.27% No 0.028 0.08% No 0.498 1.35%
Hydrogen Chloride 298 180.034 60.41% No 10.662 3.58% No 190.696 63.99%
Hydrogen Cyanide 520 0.220 0.04% No 0.013 0.003% No 0.233 0.04%
1.2,4,-
Trichlororbenzene 3,711 0.013 0.0004% No 0.001 0.00002% No 0.014 0.0004%
Table 9-3: Results of Cumulative Impact for M-136 and M-225 - Chronic 24-Hour Air Toxics
: Air Toxic
Chronic
24-hr TSL
Value
ug/m3
Scenario M136A
24-HR Cone.
ug/m3
% ofTSL
Exceed
TSL?
(Y/N)
Scenario NI225A
24-HR
Cone.
ug/m3
% of TSL
Exceed
TSL?
(Y/N)
Total (M136A and M225A)
24-HR
Cone.
ug/m3
%of
TSL
Exceed
TSL? (Y/N)
1,4-Dichlorobenzene 2004 3.04E-04 0.00% No 1.80E-05 0.00% No 3.22E-04 0.00% No
2,4-Dinitrotoluene 2.29E-04 0.00% No 1.36E-05 0.00% No 2.43E-04 0.00% No
o-Toluidine 292 2.92E-03 0.00% No 1.73E-04 0.00% No 3.09E-03 0.00% No
Phenol 642 1.00E-03 0.00% No 5.92E-05 0.00% No 1.06E-03 0.00% No
CI2 48 5.00E+00 10.42% No 2.96E-01 0.62% No 5.30E+00 11.04% No
1,1,2-Trichloroethane 1819 3.04E-04 0.00% No 1.80E-05 0.00% No 3.22E-04 0.00% No
1,3-Butadiene 49 1.00E-02 0.02% No 5.92E-04 0.00% No 1.06E-02 0.02% No
1,4-Dioxane 2402 2.67E-04 0.00% No 1.58E-05 0.00% No 2.83E-04 0.00% No
Acrylonitrile 48 6.67E-03 0.01% No 3.95E-04 0.00% No 7.06E-03 0.01% No
Benzene 1.96E-02 0.04% No 1.16E-03 0.00% No 2.07E-02 0.04% No
Bromoform 172 5.42E-04 0.00% No 3.21 E-05 0.00% No 5.74E-04 0.00% No
Carbon Tetrachloride 350 6.25E-03 0.00% No 3.70E-04 0.00% No 6.62E-03 0.00% No
Shaw Environmental, Inc 24 Addendum to Air Quality Modeling Report
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Air Toxic
Chronic
24-hr TSL
Value
ug/m3
Scenario M136A
24-HR Cone.
ug/m3
% of TSL
Exceed
TSL?
(Y/N)
Scenario M225A
24-HR
Cone.
ug/m3
% ofTSL
Exceed
TSL?
(Y/N)
Total (M136Aand M225A)
24-HR
Cone.
ug/m3
%of
TSL
Exceed
TSL? (Y/N)
Chlorobenzene 1535 1.04E-03 0.00% No 6.17E-05 0.00% No 1.10E-03 0.00%
Chloroform 1628 2.54E-03 0.00% No 1.51E-04 0.00% No 2.69E-03 0.00%
cis-1,3-Dichloropropene 151 5.42E-04 0.00% No 3.21E-05 0.00% No 5.74E-04 0.00%
Cumene 8193 1.75E-04 0.00% No 1.04E-05 0.00% No 1.85E-04 0.00%
Styrene 2840 4.13E-04 0.00% No 2.44E-05 0.00% No 4.37E-04 0.00%
Toluene 2512 7.92E-03 0.00% No 4.69E-04 0.00% No 8.39E-03 0.00%
Vinyl Chloride 28 3.17E-03 0.01% No 1.88E-04 0.00% No 3.35E-03 0.01%
Antimony 17 1.21E-02 0.07% No 7.16E-04 0.00% No 1.28E-02 0.08%
Arsenic 0.33 2.29E-04 0.07% No 1.36E-05 0.00% No 2.43E-04 0.07%
Cadmium 0.02 2.54E-04 1.27% No 1.51E-05 0.08% No 2.69E-04 1.35%
Chromium 0.11 8.33E-03 7.58% No 4.94E-04 0.45% No 8.83E-03 8.03%
Cobalt 0.77 2.54E-04 0.03% No 1.51E-05 0.00% No 2.69E-04 0.03%
Manganese 6.7 3.92E-02 0.58% No 2.32E-03 0.03% No 4.15E-02 0.62%
Mercury 0.33 3.08E-05 0.01% No 1.83E-06 0.00% No 3.27E-05 0.01%
Nickel 1.11 2.42E-02 2.18% No 1.43E-03 0.13% No 2.56E-02 2.31%
Phosphorus 3.3 4.58E-02 1.39% No 2.71 E-03 0.08% No 4.86E-02 1.47%
Selenium 6.7 6.67E-04 0.01% No 3.95E-05 0.00% No 7.06E-04 0.01%
The results for all pollutants and averaging times show compliance with Utah's TSLs. Therefore, no additional modeling was
required. A flash drive of all modeling inputs and outputs is provided in Attachment 4.
Shaw Environmental, Inc. 25 Addendum to Air Quality Modeling Report
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10.0 Development of Air Dispersion Factors for Risk Assessment
Human health and ecological risk assessment requires maximum values of one-hour and annual
average air dispersion factors (ADFs) for gas concentration, particulate concentration, gas dry
deposition, and particulate dry deposition at selected receptor locations. These ADFs were
generated using the hybrid OBODM and AERMOD models as described earlier.
10.1 Receptor Locations
The ADFs were estimated at the maximum exposed individual (MEI) locations within the
facility and off site. The MEI locations are the locations of maximum impact at on-site and off-
site locations. The site boundary was included in both on-site and off-site receptor grids for
consistency.
The on-site receptor grid consisted of a Cartesian grid with 100-meter spacing to cover the area
bounded by the facility property boundary. The worker safety buffer zones, consisting of
approximately a 2,000-foot radius around the M-136 location and approximately a 2,500-foot
radius around the M-225 location, were excluded from the on-site receptor grid when modeling
each scenario, respectively. These buffer zones represent the area from which field personnel are
excluded during OB/OD events. The off-site receptor grid and the site boundary receptors used
were as described in Section 7.0 for the air quality assessment.
In addition, the risk assessment was conducted at several discrete locations in and around the
facility. ADFs were determined for these discrete locations which are listed below:
• The Adam's Ranch, which is the closest domestic dwelling to M-136, is located
approximately 3 km south-southwest of M-136.
• The Holmgren Ranch, which is the closest domestic dwelling to M-225, is located
approximately 2 km east-southeast of M-225.
• Four facility boundary receptors that are selected based on the annual prevailing wind
direction measured over a five-year period (1997 through 2001) at the M-245
meteorological monitoring station.
• AutoLiv facility, an off-site commercial business located between the M-136 and
M-225 treatment units.
• Christensen residence, a residential dwelling located due north of ATK.
• Blue Creek perennial stream, which runs along the western boundary of M-136.
• The Bear River Migratory Bird Refuge, located about 10.5 km south-southwest of
M-225.
Shaw Environmental, Inc. 26 Addendum to Air Quality Modeling Report
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• The Salt Creek Waterfowl Management Area, located 13 km east of ATK.
• The Thiokol Ranch Pond (ATK Ranch Pond), which is located approximately 14 km
southwest of M-225.
• The Howell Dairy Farm just north of the ATK northern property boundary.
• The Town of Penrose, located approximately 7 miles southeast of M-136.
• The Town of Thatcher, located approximately 7.5 miles due east of M-136.
• Two on-site discrete receptors to assess potential risk to ATK workers that are not
directly involved with the activities at the M-136 and M-225 treatment units. These
on-site discrete receptors represent areas where most non-treatment-related
employees spend their time on site. The on-site discrete receptors include the
following:
- North Plant Main Administration Building and Main Manufacturing Area -
2.5 miles north of M-136 and 6.7 miles north-northwest of M-225.
- South Plant Main Administration Building and Main Manufacturing Area -
1.8 miles south of M-136 and 3.9 miles west-northwest of M-225.
10.2 Pollutant Phases
The following phases were considered in estimating the ADFs at the on-site MEI, off-site MEI,
and discrete receptors:
• Gas phase one-hour and annual concentrations
• Particle phase one-hour and annual concentrations
• Particle bound phase one-hour and annual concentrations
• Gas phase annual dry deposition
• Particle phase annual dry deposition
• Particle-bound phase annual dry deposition
Note that ADFs are not estimated for wet deposition. This deposition mechanism is not
applicable for this assessment, since treatment operations are not conducted during precipitation
events.
As input to the risk assessment, the ADFs for each pollutant phase were developed using
AERMOD for the M-136 and M-225 scenarios described in Section 4.0 of this document.
The ADFs are based on a unit emission rate of 1 g/s for each source within a scenario. The
ADFs developed for each scenario will be multiplied by emission rates of specific pollutants in
the risk assessment to be conducted by other consultants. Mercury speciation and exposure will
be applied within the risk assessment model, which follows guidance for mercury evaluation
Shaw Environmental, Inc. 27 Addendum to Air Quality Modeling Report
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found in the Human Health Risk Assessment Protocol (HHRAP) for Hazardous Waste
Combustion Facilities (USEPA, September 2005).
Within AERMOD, the gas phase dry deposition was modeled using a conservative deposition
velocity of 0.03 m/sec, which is the default value specified in the HHRAP guidance.
Modeling of the particle and particle-bound phases in AERMOD required the input of particle
size distribution data including: particle diameter, the mass distribution for particle phase
emissions, the surface area distribution for particle-bound phase emissions, and particle density.
The upper and lower bound diameter of each particle size category and the corresponding
particle mass fractions were generated by OBODM considering the particle information used in
previous modeling by Terra Tech, which assumed a mass median particle diameter of
30 microns, a standard deviation of 2 microns, and 10 size categories. The mean particle size
diameter for each category was calculated from the upper and lower bounds obtained from the
OBODM particle data using Equation 3-1 in the HHRAP. For modeling of the particle-bound
phase, the equations in Section 3.2.3 of the HHRAP were used to calculate the surface area-
weighted distribution of the particle size categories. The particle size distribution data for
modeling of particle and particle-bound phases in AERMOD are summarized in Table 10-1.
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Table 10-1: Particle Distribution Data
OBODM/Historical Modeling Calculai :ed From HHRAP Guidance
Particle Size Category
Bounds
(Mm)
Mass
Fraction
Mean Particle
Diameter*
(Mm)
Particle
Radius
(Mm)
Surface
Area
(Mm)2
Volume
(Mm)3
Surface
Area/
Volume
(Mm)1
Proportion
Available
Surface
Area
Fraction of
Total Surface
Area8
Lower
3.44
Upper
2.50
FM R=D/2 S=4*pi*RA2 V=(4/3)*pi*RA3 S/V F = (S/V)*FM
0.02265 2.99 1.50 28.17 14.06 2.00361 4.54E-02
F/sum(F)
7.72E-02
4.73 3.44 0.05202 4.12 2.06 53.29 36.58 1.45678 7.58E-02 1.29E-01
6.50 4.73 0.09708 5.66 2.83 100.68 95.00 1.05986 1.03E-01 1.75E-01
8.94 6.50 0.14713 7.78 3.89 190.34 246.92 0.77084 1.13E-01 1.93E-01
12.30 8.94 0.18113 10.71 5.35 360.21 642.85 0.56034 1.01E-01 1.73E-01
16.92 12.30 0.18113 14.73 7.37 681.71 1,673.68 0.40731 7.38E-02 1.25E-01
23.27 16.92 0.14713 20.26 10.13 1,289.63 4,354.83 0.29614 4.36E-02 7.41E-02
32.01 23.27 0.09708 27.87 13.93 2,439.91 11,332.75 0.21530 2.09E-02 3.56E-02
44.04 32.01 0.05202 38.34 19.17 4,617.89 29,508.00 0.15650 8.14E-03 1.38E-02
60.57 44.04 0.02265 52.74 26.37 8,737.29 76,796.06 0.11377 2.58E-03 4.38E-03
Notes:
References: 2005 HHRAP Guidance (Section 3.2, Table 3-1).
A Mean Particle Diameter (D); USEPA's HHRAP Guidance, September 2005, Equation 3-1:
D = [0.25* (Di* 3 + 01*2*02 + 01' D2
A2 + D2
A 3)]" (1/3)
Where: Di = lower bound cut of particle size category (iim)
D2 = upper bound cut of particle size category f/jmj.
8 Surface area-based distribution for particle-bound phase modeling, as descnbed in Section 3.2.3 of USEPA's HHRAP Guidance, September 2005.
Shaw Environmental. Inc 29 Addendum to Air Quality Modeling Report
ATK Launch Systems
A particle density of 2.7 grams per cubic meter was applied for this assessment and was assumed
to be constant over all particle size categories. This value corresponds to the density of
aluminum, which was determined from historical testing to be the most abundant metal in the
OB and OD emissions and was the particle density used in previous modeling of the ATK
operations.
10.3 One-Hour ADF for Concentration
The one-hour ADFs were determined individually for each of the sources representing the
operating scenarios for M-136 and M-225 using unit emission rates for emission of gaseous and
particulate pollutants. As described for the air quality assessment, the unit emission rates were
input to AERMOD for each hour of unrestricted operation. For assessing acute risk, maximum
concentrations out of the five years modeled were determined for each modeled scenario at the
on-site MEI, off-site MEI, and at each of the discrete receptors, and these concentrations
represent the one-hour ADF values.
10.4 Annual ADF for Concentration
Annual values of concentration and deposition are used to assess chronic risk and are based on
the five-year averages determined from modeling. For developing the annual ADFs, the models
were programmed to yield one-hour concentration values at each receptor averaged over the
five-year meteorological period. In the same manner as for the annual impacts for the air quality
assessment, the annual ADFs were determined individually from the five-year average one-hour
concentrations for each modeled scenario as follows:
^annual
ADF - da'*y
riurannual
^ dailv
8760
Where:
ADFannuai = Maximum annual average concentration in ug/m3
Qannual = Annual quantity of reactive waste in OB/OD (lbs)
Qdaiiy = Daily quantity of reactive waste in OB/OD (lbs)
ADFi.hr = 5-year average 1-hour concentration based on daily reactive waste
quantity
8760 - Number of hours per year
Note: The term [Qannual/Qdaiiy] represents the total number of days per year the OB/OD
events can occur to reach the annual permitted quantities.
Shaw Environmental, Inc 30 Addendum to Air Quality Modeling Report
ATK Launch Systems
Annual ADFs for the off-site MEI and the on-site MEI were calculated from the highest five-
year average one-hour concentration values for each scenario over the respective receptor sets.
For the sensitive receptors, annual ADFs were calculated from the five-year average one-hour
concentration values at each discrete receptor.
10.5 Annual ADF for Deposition
The procedure for determining the annual ADFs for dry deposition was similar to the calculation
of the annual ADFs for concentration. First, the five-year average one-hour values for dry
deposition were determined and then the annual ADFs were calculated using the equation shown
in Section 10.4 above.
10.6 Summary of ADFs
The ADFs developed for use in the risk assessment were determined for the M-136 and M-225
scenarios as described above. The ADFs for concentration and deposition are presented for the
off-site MEI, on-site MEI, and discrete receptors on the flash drive in Attachment 5. All
modeling files used in determining these ADFs for the risk assessment are included on the flash
drive in Attachment 4.
Shaw Environmental, Inc 31 Addendum to Air Quality Modeling Report
ATK Launch Systems
11.0 Conclusion
To ensure the AERMOD results represent a significant refinement, the air quality modeling
results consider that the OB and OD events occur for only one hour per day and must meet the
following criteria:
• The event will occur only between the hours 9:00 a.m. and 6:00 p.m. MST
• The wind speed during the event will be between 3 and 15 mph
• The Clearing Index during the events will be 500 or higher
The results indicate that Scenarios M-136-A and M-225-A have the greatest impact. The
cumulative impact of these two scenarios shows compliance with the NAAQS and Utah's acute
and chronic toxic screening levels. Therefore, no additional modeling is required if the above
restrictions are met when performing OB and OD events.
Shaw Environmental, Inc. 32 Addendum to Air Quality Modeling Report
ATK Launch Systems
Attachment 1
Example for the Cloud Height Calculation
OBODM Modeling for Plume Dimensions - M-136 Unit and M-225 Unit, ATK Promontory
Wind Speed Category: 10-12.5 mph
Atmospheric Stability: D (neutral)
Wind Speed
(mph) (m/s)
Scenario
Quantity of Reactive Waste
per Burn Station
(lb)
Stability Category D
Vapor Cloud
Ht (m)
10 4.47 M136 Scenar
M136 Scenar
M136 Scenari
M136 Scenari
M136 Scenari
M225 Scenari
M225 Scenari
oA-l-OB
o A-2 - OB
o A-3 - OB
oB-OB
oC-OD
oA-OB
o B-OD
16,000
10,000
16,000
125,000
600
1,125
600
235.5
216.4
235.5
295.7
189.7
145.7
189.7
11.25 5.03 M136 Scenari o A-l - OB
M136 Scenari o A-2 - OB
M136 Scenar o A-3 - OB
M136 Scenari o B-OB
M136 Scenari oC-OD
M225 Scenari o A-OB
M225 Scenari o B-OD
16,000
10,000
16,000
125,000
600
1,125
600
223.4
202.6
223.4
289.6
189.7
147.3
189.7
12.5 5.59 M136 Scenari o A-l-OB
M136 Scenari o A-2 - OB
M136 Scenar o A-3 - OB
M136 Scenar o B-OB
M136 Scenar oC-OD
M225 Scenar oA-OB
M225 Scenar o B-OD
16,000
10,000
16,000
125,000
600
1,125
600
218.5
197
218.5
287.1
189.7
132.3
189.7
Shows the minimum cloud height that wi
combination of wind speed category and
II be considered in AERMOD for this
atmospheric stability.
Cloud heights will be determined for other combinations of wind speed
category and atmospheric stability using the same approach.
Attachment 2
Summary of Screened Hours
ATK Promontory OBOD Modeling
Meteorological Data Analysis
Restrictions
Daytime Operations:
Beginning Operating Hour:
Last Operating Hour:
Clearing Index >=
10 (9 AM)
18 (6 PM)
500
Wind Speed Group M/s MPH
Group 0 1.34<=WS<2.24 3-5
Group 1 2.23<=WS<3.35 5-7.5
Group 2 3.35<=WS<4.47 7.5-10
Group 3 4.47<=WS<5.59 10-12.5
Group 4 5.59<=WS<6.71 12.5-15
Unrestricted Hours:
Meteorological Year
Atmospheric
Stability 1.34<=WS<2.24 2.23<=WS<3.35
Wind Speed Groups
3.35<=WS<4.47 4.47<=WS<5.59 S.59<=WS<6.71
1997
Total
33 99
32 120
14
71 233
12
94
55
161
70
121
193
1998
Total
31 86
19 121
13
56 220
24
103
29
156
81
119
200
1999
Total
33 101
42 134
18
86 253
29
133
40
202
69
137
206
2000
Total
34 115
18 102
18
60 235
32
158
57
247
102
168
272
2001
Total
37 142
17 132
24
62 298
20
182
56
258
106
163
270
Grand Total
Attachment 3
Detailed Modeling Results
NAAQS
ATK
AERMOD Results
Summary
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3)
%of
NAAQS
Exceedance
of NAAQS?
(Y/N)
PM2.5
M136 A 1ST 25.00 35 71.44%
24-HR M225 A 1ST 1.48 35 4.23%
Total 1ST 26.49 35 75.67%
No
No
No
PM2.5
M136 A 1ST 5.75 12 47.95%
Annual M225 A 1ST 0.05 12 0.44%
Total 1ST 5.81 12 48.39%
No
No
No
PM10
M136 A 1ST 57.14 150 38.10%
24-HR M225 A 1ST 3.65 150 2.43%
Total 1ST 60.79 150 40.53%
No
No
No
N02
M136 A 1ST 64.01 189 33.87%
1-HR M225 A 1ST 3.79 189 2.01%
Total 1ST 67.80 189 35.87%
No
No
No
N02
M136 A 1ST 0.70 100 0.70%
Annual M225 A 1ST 0.007 100 0.007%
Total 1ST 0.71 100 0.71%
No
No
No
S02
M136 A 1ST 5.00 195 2.56%
1-HR M225 A 1ST 0.30 195 0.15%
Total 1ST 5.30 195 2.72%
No
No
No
S02
M136 A 1ST 1.67 1300 0.13%
3-HR M225 A 1ST 0.10 1300 0.01%
Total 1ST 1.77 1300 0.14%
No
No
No
CO
M136 A 1ST 64.01 40,000 0.16%
1-HR M225 A 1ST 3.79 40,000 0.01%
Total 1ST 67.80 40,000 0.17%
No
No
No
CO
M136 A 1ST 8.00 10,000 0.08%
8-HR M225_A
Total
1ST
1ST
0.47
8.48
10,000
10,000
0.005%
0.08%
No
No
No
ATK
AERMOD Results: M-136
Summary - CO
Source
M136-A1
M136-A2
M136-A3
M136-B
M136-C
PM2.5 Emission Rate
725.8 g/s
75.6
121.0
945.0
9.1
CO Emission Rate
77.4 g/s
g/s
g/s
g/s
g/s
8.1
12.9
100.8
1.0
g/s
g/s
g/s
g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
CO 1-HR M136 A 1ST 64.01 40,000 0.16% No
CO 1-HR M136 B 1ST 49.44 40,000 0.12% No
CO 1-HR M136 C 1ST 0.88 40,000 0.002% No
Average 8-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
CO 8-HR M136 A 1ST 8.00 10,000 0.08% No
CO 8-HR M136 B 1ST 6.18 10,000 0.06% No
CO 8-HR M136 C 1ST 0.11 10,000 0.001% No
ATK
AERMOD Results: M-136
Sc A: M-136A1, M-136A2, M-136A3
Source
M136-A1
M136-A2
M136-A3
Total
PM2.5 Emission Rate CO Emission Rate
72S.8
75.6
121.0
922.3
g/s
g/s
g/s
g/s
77.4
8.1
12.9
98.4
g/s
g/s
g/s
g/s
Operation Limits:
CO 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 CO 1-HR ALL 1ST 382362.02 4617770.93 1472.66 59.26
1998 CO 1-HR ALL 1ST 379830.93 4616206.59 1344.98 73.14
1999 CO 1-HR ALL 1ST 379400 4616400 1454.41 66.15
2000 CO 1-HR ALL 1ST 379300 4615400 1464.83 63.06
2001 CO 1-HR ALL 1ST 382362.65 4616770.93 1506.33 58.45
Ave 64.01
CO 8-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 CO 8-HR ALL 1ST 382362.02 4617770.93 1472.66 7.41
1998 CO 8-HR ALL 1ST 379830.93 4616206.59 1344.98 9.14
1999 CO 8-HR ALL 1ST 379400 4616400 1454.41 8.27
2000 CO 8-HR ALL 1ST 379300 4615400 1464.83 7.88
2001 CO 8-HR ALL 1ST 382362.65 4616770.93 1506.33
Ave
7.31
8.00
ATK
AERMOD Results: M-136
Sc B: M-136B
Source PM2.5 Emission Rate
M136-B 945.0 g/s
CO Emission Rate
100.8 g/s
Operation Limits:
CO 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 CO 1-HR ALL 1ST 379500 4616300 1408.87 42.07 97090818
1998 CO 1-HR ALL 1ST 379832.7 4616406.58 1344.62 66.96 98091718
1999 CO 1-HR ALL 1ST 379400 4616600 1451.13 51.23 99092218
2000 CO 1-HR ALL 1ST 379200 4615400 1482.7 42.49 00022117
2001 CO 1-HR ALL 1ST 382600 4617000 1560.47 44.45 01033018
Ave 49.44
CO 8-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 CO 8-HR ALL 1ST 379500 4616300 1408.87 5.26
1998 CO 8-HR ALL 1ST 379832.7 4616406.58 1344.62 8.37
1999 CO 8-HR ALL 1ST 379400 4616600 1451.13 6.40
2000 CO 8-HR ALL 1ST 379200 4615400 1482.7 5.31
2001 CO 8-HR ALL 1ST 382600 4617000 1560.47
Ave
5.56
6.18
ATK
AERMOD Results: M-136
ScC: M-136C
Source PM2.5 Emission Rate
M136-C 9.1 g/s
CO Emission Rate
1.0 g/s
Operation Limits:
CO 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 CO 1-HR ALL 1ST 379600 4616300 1382.01 0.82 97090818
1998 CO 1-HR ALL 1ST 379831.82 4616306.59 1344.3 0.89 98091718
1999 CO 1-HR ALL 1ST 379600 4616500 1387.94 1.05 99092218
2000 CO 1-HR ALL 1ST 379500 4615600 1399.48 0.81 00022117
2001 CO 1-HR ALL 1ST 379600 4616100 1384.21 0.84 01041818
Ave 0.88
CO 8-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 CO 8-HR ALL 1ST 379600 4616300 1382.01 0.10
1998 CO 8-HR ALL 1ST 379831.82 4616306.59 1344.3 0.11
1999 CO 8-HR ALL 1ST 379600 4616500 1387.94 0.13
2000 CO 8-HR ALL 1ST 379500 4615600 1399.48 0.10
2001 CO 8-HR ALL 1ST 379600 4616100 1384.21
Ave
0.11
0.11
ATK
AERMOD Results: M-136
Summary - N02
Source PM2.5 Emission Rate
M136-A1 725.8 g/s
M136-A2 75.6 g/s
M136-A3 121.0 g/s
M136-B 945.0 g/s
M136-C 9.1 g/s
N02 Emission Rate
77.4
8.1
12.9
100.8
1.0
g/s
g/s
g/s
g/s
g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
N02 1-HR M136 A 1ST 64.01 189 33.87% No
N02 1-HR M136 B 1ST 49.44 189 26.16% No
N02 1-HR M136 C 1ST 0.88 189 0.47% No
Maximum Annual Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
N02 Annual M136 A 1ST 0.70 100 0.70% No
NQ2
N02
Annual
Annual
M136_B
M136 C
1ST
1ST
0.09
0.01
100
100
0.09%
0.01%
No
No
ATK
AERMOD Results: M-136
Sc A: M-136A1, M-136A2, M-136A3
Source
M136-A1
M136-A2
M136-A3
Total
PM2.5 Emission Rate N02 Emission Rate
725.8
75.6
121.0
922.3
g/s
g/s
g/s
g/s
77.4
8.1
12.9
98.4
g/s
g/s
g/s
g/s
Operation Limits:
N02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 N02 1-HR ALL 1ST 382362.02 4617770.93 1472.66 59.26 97032918
1998 N02 1-HR ALL 1ST 379830.93 4616206.59 1344.98 73.14 98091718
1999 N02 1-HR ALL 1ST 379400 4616400 1454.41 66.15 99092218
2000 N02 1-HR ALL 1ST 379300 4615400 1464.83 63.06 00022117
2001 N02 1-HR ALL 1ST 382362.65 4616770.93 1506.33
Ave
Max
58.45
64.01
73.14
01033018
ATK
AERMOD Results: M-136
Sc B: M-136B
Source PM2.5 Emission Rate N02 Emission Rate
M136-B 945.0 g/s 100.8 g/s
Operation Limits:
N02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 N02 1-HR ALL 1ST 379500 4616300 1408.87 42.07 97090818
1998 N02 1-HR ALL 1ST 379832.7 4616406.58 1344.62 66.96 98091718
1999 N02 1-HR ALL 1ST 379400 4616600 1451.13 51.23 99092218
2000 N02 1-HR ALL 1ST 379200 4615400 1482.7 42.49 00022117
2001 N02 1-HR ALL 1ST 382600 4617000 1560.47
Ave
Max
44.45
49.44
66.96
01033018
ATK
AERMOD Results: M-136
Sc C: M-136C
Source PM2.5 Emission Rate
M136-C 9.1 g/s
N02 Emission Rate
1.0 g/s
Operation Limits:
N02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 N02 1-HR ALL 1ST 379600 4616300 1382.01 0.817827 97090818
1998 N02 1-HR ALL 1ST 379831.82 4616306.59 1344.3 0.889116 98091718
1999 N02 1-HR ALL 1ST 379600 4616500 1387.94 1.045471 99092218
2000 N02 1-HR ALL 1ST 379500 4615600 1399.48 0.806849 00022117
2001 N02 1-HR ALL 1ST 379600 4616100 1384.21
Ave
Max
0.84253
0.88
1.05
01041818
ATK
AERMOD Results: M-136
Annual Calculations
Scenario A
Daily Quantity (lbs)
Annual Quantity (lbs)
Days/Year
Maximum Days/Year
At 84 Days/Year
Total (lbs)
Stations 1-12
96,000
6,720,000
70
8,064,000
Station 13
10,000
840,000
84
84
840,000
10,248,000
Station 14
16,000
840,000
52.5
1,344,000
Max 24-HR Impact:
Annual Impact at 84 Days/Year:
3.05
0.70
ug/m3
ug/m 3
Scenario B Station 14
Daily Quantity (lbs) 125,000
Annual Quantity (lbs) 1,500,000
Days/Year 12
Max 24-HR Impact: 2.79 ug/m3
Annual Impact at 12 Days/Year: 0.09 ug/m3
Scenario C Stations 13 and 14
Daily Quantity (lbs) 1,200
Annual Quantity (lbs) 100,000
Days/Year 84
Max 24-HR Impact:
Annual Impact at 84 Days/Year:
0.04
0.01
ug/m3
ug/m3
ATK
AERMOD Results: M-136
Summary - PM10
Source PM2.5 Emission Rate
M136-A1 725.8 g/s
M136-A2 75.6 g/s
M136-A3 121.0 g/s
M136-B 945.0 g/s
M136-C 9.1 g/s
PM10 Emission Rate
1451.5 g/s
151.2
241.9
1890.0
18.1
g/s
g/s
g/s
g/s
Average 1-HR Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
PM10 1-HR M136 A 1ST 1200.22
PM10 1-HR M136 B 1ST 926.96
PM10 1-HR M136 C 1ST 16.51
Maximum 24-HR Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
PM10 24-HR M136 A 1ST 57.14 150 38.10% No
PM10
PM10
24-HR
24-HR
M136_B
M136 C
1ST
1ST
52.31
0.82
150
150
34.87%
0.54%
No
No
ATK
AERMOD Results: M-136
Sc A: M-136A1, M-136A2, M-136A3
Source
M136-A1
M136-A2
M136-A3
Total
PM2.5 Emission Rate PM10 Emission Rate
725.8
75.6
121.0
922.3
g/s
g/s
g/s
g/s
1451.5 g/s
151.2 g/s
241.9 g/s
1844.6 g/s
Operation Limits:
PM10 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM10 1-HR ALL 1ST 382362.02 4617770.93 1472.66 1111.05 97032918
1998 PM10 1-HR ALL 1ST 379830.93 4616206.59 1344.98 1371.45 98091718
1999 PM10 1-HR ALL 1ST 379400 4616400 1454.41 1240.38 99092218
2000 PM10 1-HR ALL 1ST 379300 4615400 1464.83 1182.36 00022117
2001 PM10 1-HR ALL 1ST 382362.65 4616770.93 1506.33 1095.88 01033018
Ave 1200.22
PM10 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM10 24-HR ALL 1ST 382362.02 4617770.93 1472.66 46.29
1998 PM10 24-HR ALL 1ST 379830.93 4616206.59 1344.98 57.14
1999 PM10 24-HR ALL 1ST 379400 4616400 1454.41 51.68
2000 PM10 24-HR ALL 1ST 379300 4615400 1464.83 49.27
2001 PM10 24-HR ALL 1ST 382362.65 4616770.93 1506.33
Max
45.66
57.14
ATK
AERMOD Results: M-136
Sc B: M-136B
Source PM2.5 Emission Rate PM10 Emission Rate
M136-B 945.0 g/s 1890.0 g/s
Operation Limits:
PM10 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year
1997
Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
PM10 1-HR ALL 1ST 379500 4616300 1408.87 788.76306 97090818
1998 PM10 1-HR ALL 1ST 379832.7 4616406.58 1344.62 1255.4544 98091718
1999 PM10 1-HR ALL 1ST 379400 4616600 1451.13 960.47638 99092218
2000 PM10 1-HR ALL 1ST 379200 4615400 1482.7 796.72006 00022117
2001 PM10 1-HR ALL 1ST 382600 4617000 1560.47 833.39556 01033018
Ave 926.96
PM10 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM10 24-HR ALL 1ST 379500 4616300 1408.87 32.87
1998 PM10 24-HR ALL 1ST 379832.7 4616406.58 1344.62 52.31
1999 PM10 24-HR ALL 1ST 379400 4616600 1451.13 40.02
2000 PM10 24-HR ALL 1ST 379200 4615400 1482.7 33.20
2001 PM10 24-HR ALL 1ST 382600 4617000 1560.47
Max
34.72
52.31
ATK
AERMOD Results: M-136
Sc C: M-136C
Source PM2.5 Emission Rate PM10 Emission Rate
M136-C 9.1 g/s 18.1 g/s
Operation Limits:
PM10 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM10 1-HR ALL 1ST 379600 4616300 1382.01 15.33426 97090818
1998 PM10 1-HR ALL 1ST 379831.82 4616306.59 1344.3 16.67092 98091718
1999 PM10 1-HR ALL 1ST 379600 4616500 1387.94 19.60258 99092218
2000 PM10 1-HR ALL 1ST 379500 4615600 1399.48 15.12842 00022117
2001 PM10 1-HR ALL 1ST 379600 4616100 1384.21 15.79744 01041818
Ave 16.51
PM10 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM10 24-HR ALL 1ST 379600 4616300 1382.01 0.64
1998 PM10 24-HR ALL 1ST 379831.82 4616306.59 1344.3 0.69
1999 PM10 24-HR ALL 1ST 379600 4616500 1387.94 0.82
2000 PM10 24-HR ALL 1ST 379500 4615600 1399.48 0.63
2001 PM10 24-HR ALL 1ST 379600 4616100 1384.21
Max
0.66
0.82
ATK
AERMOD Results: M-136
Summary - PM2.5
Source
M136-A1
M136-A2
M136-A3
M136-B
M136-C
PM2.5 Emission Rate
725.8 g/s
75.6
121.0
945.0
9.1
g/s
g/s
g/s
g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
PM2.5 1-HR M136 A 1ST 600.11
PM2.5 1-HR M136 B 1ST 463.48
PM2.5 1-HR M136 C 1ST 8.25
Average 24-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
PM2.5 24-HR M136 A 1ST 25.00 35 71.44% No
PM2.5 24-HR M136 B 1ST 19.31 35 55.18% No
PM2.5 24-HR M136 C 1ST 0.34 35 0.98% No
Average Annual Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
PM2.5
PM2.5
PM2.5
Annual
Annual
Annual
M136_A
M136_B
M136 C
1ST
1ST
1ST
5.75
0.63
0.08
12
12
12
47.95%
5.29%
0.66%
No
No
No
ATK
AERMOD Results: M-136
Sc A: M-136A1, M-136A2, M-136A3
Source PM2.5 Emission Rate
M136-A1 725.8 g/s
M136-A2 75.6 g/s
M136-A3 121.0 g/s
Operation Limits:
PM2.5 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM2.5 1-HR ALL 1ST 382362.02 4617770.93 1472.66 555.525 97032918
1998 PM2.5 1-HR ALL 1ST 379830.93 4616206.59 1344.98 685.7226 98091718
1999 PM2.5 1-HR ALL 1ST 379400 4616400 1454.41 620.1922 99092218
2000 PM2.5 1-HR ALL 1ST 379300 4615400 1464.83 591.1811 00022117
2001 PM2.5 1-HR ALL 1ST 382362.65 4616770.93 1506.33 547.9388 01033018
Ave 600.11
PM2.5 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM2.5 24-HR ALL 1ST 382362.02 4617770.93 1472.66 23.15
1998 PM2.5 24-HR ALL 1ST 379830.93 4616206.59 1344.98 28.57
1999 PM2.5 24-HR ALL 1ST 379400 4616400 1454.41 25.84
2000 PM2.5 24-HR ALL 1ST 379300 4615400 1464.83 24.63
2001 PM2.5 24-HR ALL 1ST 382362.65 4616770.93 1506.33
Ave
22.83
25.00
ATK
AERMOD Results: M-136
Sc B: M-136B
Source PM2.5 Emission Rate
M136-B 945.0 g/s
Operation Limits:
PM2.5 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM2.5 1-HR ALL 1ST 379500 4616300 1408.87 394.3815 97090818
1998 PM2.5 1-HR ALL 1ST 379832.7 4616406.58 1344.62 627.7272 98091718
1999 PM2.5 1-HR ALL 1ST 379400 4616600 1451.13 480.2382 99092218
2000 PM2.5 1-HR ALL 1ST 379200 4615400 1482.7 398.36 00022117
2001 PM2.5 1-HR ALL 1ST 382600 4617000 1560.47
Ave
416.6978
463.48
01033018
PM2.5 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM2.5 24-HR ALL 1ST 379500 4616300 1408.87 16.43
1998 PM2.5 24-HR ALL 1ST 379832.7 4616406.58 1344.62 26.16
1999 PM2.5 24-HR ALL 1ST 379400 4616600 1451.13 20.01
2000 PM2.5 24-HR ALL 1ST 379200 4615400 1482.7 16.60
2001 PM2.5 24-HR ALL 1ST 382600 4617000 1560.47
Ave
17.36
19.31
ATK
AERMOD Results: M-136
Sc C: M-136C
Source PM2.5 Emission Rate
M136-C 9.1 g/s
Operation Limits:
PM2.5 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m) -
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM2.5 1-HR ALL 1ST 379600 4616300 1382.01 7.66713 97090818
1998 PM2.5 1-HR ALL 1ST 379831.82 4616306.59 1344.3 8.33546 98091718
1999 PM2.5 1-HR ALL 1ST 379600 4616500 1387.94 9.80129 99092218
2000 PM2.5 1-HR ALL 1ST 379500 4615600 1399.48 7.56421 00022117
2001 PM2.5 1-HR ALL 1ST 379600 4616100 1384.21 7.89872 01041818
Ave 8.25
PM2.5 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM2.5 24-HR ALL 1ST 379600 4616300 1382.01 0.32
1998 PM2.5 24-HR ALL 1ST 379831.82 4616306.59 1344.3 0.35
1999 PM2.5 24-HR ALL 1ST 379600 4616500 1387.94 0.41
2000 PM2.5 24-HR ALL 1ST 379500 4615600 1399.48 0.32
2001 PM2.5 24-HR ALL 1ST 379600 4616100 1384.21
Ave
0.33
0.34
ATK
AERMOD Results: M-136
Annual Calculations
Station 14
16,000
840,000
52.5
1,344,000
Max 24-HR Impact: 25.00 ug/m3
Annual Impact at 84 Days/Year: 5.75 ug/m3
Scenario A Stations 1-12 Station 13
Daily Quantity (lbs) 96,000 10,000
Annual Quantity (lbs) 6,720,000 840,000
Days/Year 70 84
Maximum Days/Year 84
At 84 Days/Year 8,064,000 840,000
Total (lbs) 10,248,000
Scenario B Station 14
Daily Quantity (lbs) 125,000
Annual Quantity (lbs) 1,500,000
Days/Year 12
Max 24-HR Impact: 19.31 ug/m3
Annual Impact at 12 Days/Year: 0.63 ug/m3
Scenario C Stations 13 and 14
Daily Quantity (lbs) 1,200
Annual Quantity (lbs) 100,000
Days/Year 84
Max 24-HR Impact: 0.34 ug/m3
Annual Impact at 84 Days/Year: 0.08 ug/m3
ATK
AERMOD Results: M-136
Summary -S02
Source
M136-A1
M136-A2
M136-A3
M136-B
M136-C
PM2.5 Emission Rate
725.8 g/s
75.6
121.0
945.0
9.1
g/s
g/s
g/s
g/s
S02 Emission Rate
6.0 g/s
0.6 g/s
1.0 g/s
7.9 " g/s
0.1 g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
S02 1-HR M136 A 1ST 5.00 195 2.56% No
S02 1-HR M136 B 1ST 3.86 195 1.98% No
S02 1-HR M136 C 1ST 0.07 195 0.04% No
Average 3-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
S02 3-HR M136 A 1ST 1.67 1,300 0.13% No
SQ2
S02
3-HR
3-HR
M136_B
M136 C
1ST
1ST
1.29
0.02
1,300
1,300
0.10%
0.00%
No
No
ATK
AERMOD Results: M-136
Sc A: M-136A1, M-136A2, M-136A3
Source
M136-A1
M136-A2
M136-A3
Total
PM2.5 Emission Rate S02 Emission Rate
725.8
75.6
121.0
922.3
g/s
g/s
g/s
g/s
6.0
0.6
1.0
7.7
g/s
g/s
g/s
g/s
Operation Limits:
502 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 S02 1-HR ALL 1ST 382362.02 4617770.93 1472.66 4.63 97032918
1998 S02 1-HR ALL 1ST 379830.93 4616206.59 1344.98 5.71 98091718
1999 S02 1-HR ALL 1ST 379400 4616400 1454.41 5.17 99092218
2000 S02 1-HR ALL 1ST 379300 4615400 1464.83 4.93 00022117
2001 S02 1-HR ALL 1ST 382362.65 4616770.93 1506.33 4.57 01033018
Ave 5.00
S02 3-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 S02 3-HR ALL 1ST 382362.02 4617770.93 1472.66 1.54
1998 S02 3-HR ALL 1ST 379830.93 4616206.59 1344.98 1.90
1999 S02 3-HR ALL 1ST 379400 4616400 1454.41 1.72
2000 S02 3-HR ALL 1ST 379300 4615400 1464.83 1.64
2001 S02 3-HR ALL 1ST 382362.65 4616770.93 1506.33
Ave
1.52
1.67
ATK
AERMOD Results: M-136
Sc B: M-136B
Source PM2.5 Emission Rate
M136-B 945.0 g/s
S02 Emission Rate
7.9 g/s
Operation Limits:
S02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(mj
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 S02 1-HR ALL 1ST 379500 4616300 1408.87 3.29 97090818
1998 S02 1-HR ALL 1ST 379832.7 4616406.58 1344.62 5.23 98091718
1999 S02 1-HR ALL 1ST 379400 4616600 1451.13 4.00 99092218
2000 S02 1-HR ALL 1ST 379200 4615400 1482.7 3.32 00022117
2001 S02 1-HR ALL 1ST 382600 4617000 1560.47 3.47 01033018
Ave 3.86
S02 3-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 S02 3-HR ALL 1ST 379500 4616300 1408.87 1.10
1998 S02 3-HR ALL 1ST 379832.7 4616406.58 1344.62 1.74
1999 S02 3-HR ALL 1ST 379400 4616600 1451.13 1.33
2000 S02 3-HR ALL 1ST 379200 4615400 1482.7 1.11
2001 S02 3-HR ALL 1ST 382600 4617000 1560.47
Ave
1.16
1.29
ATK
AERMOD Results: M-136
Sc C: M-136C
Source PM2.5 Emission Rate
M136-C 9.1 g/s
S02 Emission Rate
0.1 g/s
Operation Limits:
S02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 S02 1-HR ALL 1ST 379600 4616300 1382.01 0.063893 97090818
1998 S02 1-HR ALL 1ST 379831.82 4616306.59 1344.3 0.069462 98091718
1999 S02 1-HR ALL 1ST 379600 4616500 1387.94 0.081677 99092218
2000 S02 1-HR ALL 1ST 379500 4615600 1399.48 0.063035 00022117
2001 S02 1-HR ALL 1ST 379600 4616100 1384.21 0.065823 01041818
Ave 0.07
S02 3-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 S02 3-HR ALL 1ST 379600 4616300 1382.01 0.02
1998 S02 3-HR ALL 1ST 379831.82 4616306.59 1344.3 0.02
1999 S02 3-HR ALL 1ST 379600 4616500 1387.94 0.03
2000 S02 3-HR ALL 1ST 379500 4615600 1399.48 0.02
2001 S02 3-HR ALL 1ST 379600 4616100 1384.21
Ave
0.02
0.02
ATK
AERMOD Results: M-225
Summary - CO
Source PM2.5 Emission Rate
M225-A 34.0 g/s
M225-B 4.5 g/s
CO Emission Rate
3.6 g/s
0.5 g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
CO 1-HR M225 A 1ST 3.79 40,000 0.01% No
CO 1-HR M225 B 1ST 0.34 40,000 0.001% No
Average 8-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
CO 8-HR M225 A 1ST 0.47 10,000 0.005% No
CO 8-HR M225 B 1ST 0.04 10,000 0.0004% No
ATK
AERMOD Results: M-225
Sc A: M-225A
Source PM2.5 Emission Rate
M225-A 34.0 g/s
CO Emission Rate
3.6 g/s
Operation Limits:
CO 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 CO 1-HR ALL 1ST 387300 4610300 1382.75 4.32 97040818
1998 CO 1-HR ALL 1ST 387266.82 4611352 1430.36 3.29 98120216
1999 CO 1-HR ALL 1ST 387300 4610600 1400.49 4.67 99121416
2000 CO 1-HR ALL 1ST 386552.26 4608450.55 1299.93 3.07 00031418
2001 CO 1-HR ALL 1ST 387270.82 4610952.02 1417.59 3.61 01031318
Ave 3.79
CO 8-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 CO 8-HR ALL 1ST 387300 4610300 1382.75 0.539533
1998 CO 8-HR ALL 1ST 387266.82 4611352 1430.36 0.411376
1999 CO 8-HR ALL 1ST 387300 4610600 1400.49 0.584094
2000 CO 8-HR ALL 1ST 386552.26 4608450.55 1299.93 0.383736
2001 CO 8-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
0.450649
0.47
ATK
AERMOD Results: M-225
Sc B: M-225B
Source PM2.5 Emission Rate
M225-B 4.5 g/s
CO Emission Rate
0.5 g/s
Operation Limits:
CO 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 CO 1-HR ALL 1ST 387260.82 4611951.97 1461.87 0.37629547 97032918
1998 CO 1-HR ALL 1ST 387266.82 4611352 1430.36 0.30881813 98120216
1999 CO 1-HR ALL 1ST 387300 4610600 1400.49 0.3263392 99121416
2000 CO 1-HR ALL 1ST 385597.32 4607805.49 1297.85 0.32178667 00040118
2001 CO 1-HR ALL 1ST 387270.82 4610952.02 1417.59 0.3471296 01033018
Ave 0.34
CO 8-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 CO 8-HR ALL 1ST 387260.82 4611951.97 1461.87 0.04703693
1998 CO 8-HR ALL 1ST 387266.82 4611352 1430.36 0.03860227
1999 CO 8-HR ALL 1ST 387300 4610600 1400.49 0.0407924
2000 CO 8-HR ALL 1ST 385597.32 4607805.49 1297.85 0.04022333
2001 CO 8-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
0.0433912
0.04
ATK
AERMOD Results: M-225
Summary - N02
Source PM2.5 Emission Rate
M225-A 34.0 g/s
M225-B 4.5 g/s
N02 Emission Rate
3.6 g/s
0.5 g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
N02 1-HR M225 A 1ST 3.79 189 2.01% No
N02 1-HR M225 B 1ST 0.34 189 0.18% No
Maximum Annual Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
N02 Annual M225 A 1ST 0.007 100 0.007% No
N02 Annual M225 B 1ST 0.001 100 0.001% No
ATK
AERMOO Results: M-225
Sc A: M-225A
Source PM2.5 Emission Rate
M225-A 34.0 g/s
N02 Emission Rate
3.6 g/s
Operation Limits:
N02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 N02 1-HR ALL 1ST 387300 4610300 1382.75 4.316261 97040818
1998 N02 1-HR ALL 1ST 387266.82 4611352 1430.36 3.291007 98120216
1999 N02 1-HR ALL 1ST 387300 4610600 1400.49 4.672755 99121416
2000 N02 1-HR ALL 1ST 386552.26 4608450.55 1299.93 3.069888 00031418
2001 N02 1-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
Max
3.60519
3.79
4.67
01031318
ATK
AERMOD Results: M-225
Sc B: M-225B
Source PM2.5 Emission Rate
M225-B 4.5 g/s
N02 Emission Rate
0.5 g/s
Operation Limits:
N02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 N02 1-HR ALL 1ST 387260.82 4611951.97 1461.87 0.376295 97032918
1998 N02 1-HR ALL 1ST 387266.82 4611352 1430.36 0.308818 98120216
1999 N02 1-HR ALL 1ST 387300 4610600 1400.49 0.326339 99121416
2000 N02 1-HR ALL 1ST 385597.32 4607805.49 1297.85 0.321787 00040118
2001 N02 1-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
Max
0.34713
0.34
0.38
01033018
ATK
AERMOD Results: M-225
Annual Calculations
Scenario A Stations 1-4
Daily Quantity (lbs) 4,500
Annual Quantity (lbs) 55,000
Days/Year 13
Max 24-HR Impact: 0.19 ug/m3
Annual Impact at 13 Days/Year: 0.007 ug/m3
Scenario B Station 1
Daily Quantity (lbs) 600
Annual Quantity (lbs) 10,000
Days/Year 17
Max 24-HR Impact:
Annual Impact at 17 Days/Year:
0.02
0.001
ug/m 3
ug/m 3
ATK
AERMOD Results: M-225
Summary - PM10
Source PM2.5 Emission Rate
M225-A 34.0 g/s
M225-B 4.5 g/s
PM10 Emission Rate
68.0 g/s
9.1 g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
PM10 1-HR M225 A 1ST 71.08
PM10 1-HR M225 B 1ST 6.30
Maximum 24-HR Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
PM10
PM10
24-HR
24-HR
M225_A
M225 B
1ST
1ST
3.65
0.29
150
150
2.43%
0.20%
No
No
ATK
AERMOD Results: M-225
Sc A: M-225A
Source PM2.5 Emission Rate PM10 Emission Rate
M225-A 34.0 g/s 68.0 g/s
Operation Limits:
PM10 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM10 1-HR ALL 1ST 387300 4610300 1382.75 80.9299 97040818
1998 PM10 1-HR ALL 1ST 387266.82 4611352 1430.36 61.70638 98120216
1999 PM10 1-HR ALL 1ST 387300 4610600 1400.49 87.61416 99121416
2000 PM10 1-HR ALL 1ST 386552.26 4608450.55 1299.93 57.5604 00031418
2001 PM10 1-HR ALL 1ST 387270.82 4610952.02 1417.59 67.59732 01031318
Ave 71.08
PM10 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM10 24-HR ALL 1ST 387300 4610300 1382.75 3.37
1998 PM10 24-HR ALL 1ST 387266.82 4611352 1430.36 2.57
1999 PM10 24-HR ALL 1ST 387300 4610600 1400.49 3.65
2000 PM10 24-HR ALL 1ST 386552.26 4608450.55 1299.93 2.40
2001 PM10 24-HR ALL 1ST 387270.82 4610952.02 1417.59
Max
2.82
3.65
ATK
AERMOD Results: M-225
Sc B: M-225B
Source PM2.5 Emission Rate PM10 Emission Rate
M225-B 4.5 g/s 9.1 g/s
Operation Limits:
PM10 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM10 1-HR ALL 1ST 387260.82 4611951.97 1461.87 7.05554 97032918
1998 PM10 1-HR ALL 1ST 387266.82 4611352 1430.36 5.79034 98120216
1999 PM10 1-HR ALL 1ST 387300 4610600 1400.49 6.11886 99121416
2000 PM10 1-HR ALL 1ST 385597.32 4607805.49 1297.85 6.0335 00040118
2001 PM10 1-HR ALL 1ST 387270.82 4610952.02 1417.59 6.50868 01033018
Ave 6.30
PM10 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM10 24-HR ALL 1ST 387260.82 4611951.97 1461.87 0.29
1998 PM10 24-HR ALL 1ST 387266.82 4611352 1430.36 0.24
1999 PM10 24-HR ALL 1ST 387300 4610600 1400.49 0.25
2000 PM10 24-HR ALL 1ST 385597.32 4607805.49 1297.85 0.25
2001 PM10 24-HR ALL 1ST 387270.82 4610952.02 1417.59
Max
0.27
0.29
ATK
AERMOD Results: M-225
Summary - PM2.5
Source PM2.5 Emission Rate
M225-A 34.0 g/s
M225-B 4.5 g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
PM2.5
PM2.5
Averaging
Time
1-HR
1-HR
Group
M225 A
M225 B
Rank
1ST
1ST
Cone.
(ug/m3)
35.54
3.15
Average 24-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
PM2.5 24-HR M225 A 1ST 1.48 35 4.23% No
PM2.5 24-HR M225 B 1ST 0.13 35 0.38% No
Average Annual Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
PM2.5
PM2.5
Annual
Annual
M225_A
M225 B
1ST
1ST
0.05
0.01
12
12
0.44%
0.05%
No
No
ATK
AERMOD Results: M-225
Sc A: M-225A
Source PM2.5 Emission Rate
M225-A # 34.0 g/s
Operation Limits:
PM2.5 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3) Time
1997 PM2.5 1-HR ALL 1ST 387300 4610300 1382.75 40.46495 97040818
1998 PM2.5 1-HR ALL 1ST 387266.82 4611352 1430.36 30.85319 98120216
1999 PM2.5 1-HR ALL 1ST 387300 4610600 1400.49 43.80708 99121416
2000 PM2.5 1-HR ALL 1ST 386552.26 4608450.55 1299.93 28.7802 00031418
2001 PM2.5 1-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
33.79866
35.54
01031318
PM2.5 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM2.5 24-HR ALL 1ST 387300 4610300 1382.75 1.69
1998 PM2.5 24-HR ALL 1ST 387266.82 4611352 1430.36 1.29
1999 PM2.5 24-HR ALL 1ST 387300 4610600 1400.49 1.83
2000 PM2.5 24-HR ALL 1ST 386552.26 4608450.55 1299.93 1.20
2001 PM2.5 24-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
1.41
1.48
ATK
AERMOD Results: M-225
Sc B: M-225B
Source PM2.5 Emission Rate
M225-B 4.5 g/s
Operation Limits:
PM2.5 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM2.5 1-HR ALL 1ST 387260.82 4611951.97 1461.87 3.52777
1998 PM2.5 1-HR ALL 1ST 387266.82 4611352 1430.36 2.89517
1999 PM2.5 1-HR ALL 1ST 387300 4610600 1400.49 3.05943
2000 PM2.5 1-HR ALL 1ST 385597.32 4607805.49 1297.85 3.01675
2001 PM2.5 1-HR ALL 1ST 387270.82 4610952.02 1417.59 3.25434
Ave 3.15
PM2.5 24-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 PM2.5 24-HR ALL 1ST 387260.82 4611951.97 1461.87 0.15
1998 PM2.5 24-HR ALL 1ST 387266.82 4611352 1430.36 0.12
1999 PM2.5 24-HR ALL 1ST 387300 4610600 1400.49 0.13
2000 PM2.5 24-HR ALL 1ST 385597.32 4607805.49 1297.85 0.13
2001 PM2.5 24-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
0.14
0.13
ATK
AERMOD Results: M-225
Annual Calculations
Scenario A Stations 1-4
Daily Quantity (lbs) 4,500
Annual Quantity (lbs) 55,000
Days/Year 13
Max 24-HR Impact: 1.48 ug/m3
Annual Impact at 13 Days/Year: 0.05 ug/m3
Scenario B Station 1
Daily Quantity (lbs) 600
Annual Quantity (lbs) 10,000
Days/Year 17
Max 24-HR Impact: 0.13 ug/m3
Annual Impact at 17 Days/Year: 0.01 ug/m3
ATK
AERMOD Results: M-225
Summary -S02
Source PM2.5 Emission Rate
M225-A 34.0 g/s
M225-B 4.5 g/s
S02 Emission Rate
0.3 g/s
0.04 g/s
Average 1-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
S02 1-HR M225 A 1ST 0.30 195 0.15% No
S02 1-HR M225 B 1ST 0.03 195 0.01% No
Averaga 3-HR Maximum Concentration (1997-2001)
Pollutant
Averaging
Time Group Rank
Cone.
(ug/m3)
NAAQS
(ug/m3) % of NAAQS
Exceedance
of NAAQS?
(Y/N)
S02 3-HR M225 A 1ST 0.10 1300 0.01% No
S02 3-HR M225 B 1ST 0.01 1300 0.00% No
ATK
AERMOD Results: M-225
ScA: M-225A
Source PM2.5 Emission Rate
M225-A 34.0 g/s
S02 Emission Rate
0.3 g/s
Operation Limits:
S02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 S02 1-HR ALL 1ST 387300 4610300 1382.75 0.337208
1998 S02 1-HR ALL 1ST 387266.82 4611352 1430.36 0.25711
1999 S02 1-HR ALL 1ST 387300 4610600 1400.49 0.365059
2000 S02 1-HR ALL 1ST 386552.26 4608450.55 1299.93 0.239835
2001 S02 1-HR ALL 1ST 387270.82 4610952.02 1417.59 0.281656
Ave 0.30
S02 3-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 S02 3-HR ALL 1ST 387300 4610300 1382.75 0.112403
1998 S02 3-HR ALL 1ST 387266.82 4611352 1430.36 0.085703
1999 S02 3-HR ALL 1ST 387300 4610600 1400.49 0.121686
2000 S02 3-HR ALL 1ST 386552.26 4608450.55 1299.93 0.079945
2001 S02 3-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
0.093885
0.10
ATK
AERMOD Results: M-225
Sc B: M-225B
Source PM2.5 Emission Rate
M225-B 4.5 g/s
S02 Emission Rate
0.04 g/s
Operation Limits:
S02 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 S02 1-HR ALL 1ST 387260.82 4611951.97 1461.87 0.029398
1998 S02 1-HR ALL 1ST 387266.82 4611352 1430.36 0.024126
1999 S02 1-HR ALL 1ST 387300 4610600 1400.49 0.025495
2000 S02 1-HR ALL 1ST 385597.32 4607805.49 1297.85 0.02514
2001 S02 1-HR ALL 1ST 387270.82 4610952.02 1417.59 0.02712
Ave 0.03
502 3-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation
(m)
Cone.
(ug/m3)
1997 S02 3-HR ALL 1ST 387260.82 4611951.97 1461.87 0.009799
1998 S02 3-HR ALL 1ST 387266.82 4611352 1430.36 0.008042
1999 S02 3-HR ALL 1ST 387300 4610600 1400.49 0.008498
2000 S02 3-HR ALL 1ST 385597.32 4607805.49 1297.85 0.00838
2001 S02 3-HR ALL 1ST 387270.82 4610952.02 1417.59
Ave
0.00904
0.01
Air Toxics
ATK
Air Toxics Analysis: Utah Acute 1-hr TSL
M136A and M225A
Maximum PM2.5 Emission Factor = 6.00E-02
(Table 2-5, Tetratech 2012 Protocol, includes background cone)
lb/lb Reactive Waste
Scenario
Reactive Waste
(lbs)
PM2.5 Emission Rate
(lb/event) (Ib/hr) (g/s)
M136 Scenario A-Total OB 122,000 7320 0 7320.0
M225 Scenario A - OB 4,500
AERMOD RESULTS
Operation Limits:
M-136A: PM2.5 1-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Averaging
Time Group
Easting (X)
(m)
Northing (Y)
(m) Elevation (m)
Cone.
(ug/m3)
M136A 1472.66 97032918
1344.98 685.72261
PM2 S 1454.41 620.19215
2000
4616770.93 1506 33
600.11
M-225A: PM2.5 1-HR Results
Year Pollutant
Averaging
Time Group Rank
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation (m)
Cone.
(ug/m3)
1-HR M225A 1382.75 40 46495
1ST 4610952.02 1417.59
Ave 35.54
AIR TOXICS RESULTS
Air Toxics- Emission Rates
]/lb Reactive Wast
Isophorone
Formaldehyde
Hydrogen Chloride (HCI)
Hydrogen Cyanide (HC)
1,2,4,-Tnchlororbenzene2
5.50E-07
1.80E-02
1.30E-06
Scenario M136A
Emission Rate
(lb/event)
0 1
(Ib/hr)
0.1
(g/s)
Scenario M225A
Emission Rate
(lb/event)
0.002
0.01
(Ib/hr)
81.0
(g/s)
1. Max EF referenced from Table 2-5, Tetratech 2012 Protocol, includes background cone.
2. Used Max EF for 1,2,4,-Tnchlororbenzene. Two different emission rates were listed in Table 2-5.
Air Toxics: Toxic Screening Level Analysis
Acute 1-hr TSL
Value
ug/m3
Scenario M136A
ug/m3 % of TSL Exceed TSL?
(Y/N)
Scenario M225A
1-HR Cone
ug/m3 % of TSL Exceed TSL?
(Y/N)
Total (M136Aand M225A)
1-HR Cone
ug/m3 % ofTSL Exceed TSL?
(Y/N)
Isophorone 2,826 0 006
Formaldehyde
Hydrogen Chloride (HCI)
Hydrogen Cyanide (HC)
1,2,4,-Tnchlororbenzene 3,711
ATK
Air Toxics Analysis: Utah Chronic 24-hr TSL
M136A and M225A
Maximum PM2 S Emission Factor = 6 00E-02
(Table 2-5, Tetratech 2012 Protocol, includes background cone)
lb/lb Reactive Waste
Reactive Waste
(lbs)
PM2.5 Emission Rate
(lb/event) (Ib/hr) (g/s)
M136 Scenario A-Total OB 7320.0
M225 Scenario A - OB 4,500
AERMOD RESULTS
Operation Limits:
M-136A: PM2 5 24-HR Results
CI >= 500
Hours: Between 10-18
1.34 m/s <= WS<= 6.71 m/s
Specific release height based on wind speed and stability
Averaging
Time Group
Easting (X)
(m)
Northing (Y)
(m)
Base
Elevation (m)
Cone.
(ug/m3)
M136A
M-225A: PM2.5 24-HR Results
Averaging
Time Group
Easting (X)
M
Northing (Y)
(m)
Base
Elevation (n
Cone
(ug/m3)
M225A
AIR TOXICS RESULTS
Air Toxics: Emission Rates
Max EF*
(lb/lb Reactive Waste)
Scenario M136A
Emission Rate
(Ib/eventl (Ib/hr) (g/s)
Scenario M225A
Emission Rate
(lb/event) (Ib/hr) (g/s)
1,4-Dichlorobenzene 7.30E-07 8.91E-02
2,4-Dinitrotoluene
1,1,2-Trichloroethane
1,4-Dioxane
Acrylonitnle
Benzene
Carbon Tetrachloride
Chlorobenzene
Chloroform
cis-l,3-Dichloropropene
Cumene
Styrena
Toluene
Vinyl Chloride
Antimony
Manganese
Mercury
Nickel
Phosphorus
Selenium
1. Max EF referenced from Table 2-5, Tetratech 2012 Protocol, includes background cone.
2. Used Max EF for 1,4-Dichlorobenzana. Two different emission rates were listed in Table
ATK
Air Toxics Analysis: Utah Chronic 24-hr TSL
M136A and M225A
Air Toxics: Toxic Screening Level Analysis
Air Toxic Chronic 24-hr TSL Value
ug/m3
Scenario M136A
ug/m3
Exceed TSL?
(Y/N)
Scenario M225A
ug/m3
Exceed TSL?
(Y/N)
Total (M136A and M225A)
24-HR Cone
ug/m3 % of TSL Exceed TSL?
(Y/N)
1,4-Dichlorobenzene 3.22E-04
2,4-Dinitrotoluene
1,1.2-Tnchloroethane
1,3-Butadiene
1,4-Dioxane
Acrylonitnle
Benzene
Carbon Tetrachloride
Chloro benzene
cis-l,3-Dichloropropene
Styrene
Vinyl Chloride
Antimony
Arsenic
Cobalt
Manganese
Mercury
Nickel
Phosphorus
Selenium
Attachment 4
Modeling Inputs/Outputs
See Attached Flash Drive
Attachment 5
Summary of ADFs for the Risk Assessment
See Attached Flash Drive
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