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Case USR17-0043 - CACTUS HILL RANCH COMPANY, C/O SIMON CONTRACTORS, INC.
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Exhibit Page # Submitted By Description
(Cont'd from 2017-4314)
CP.
(cont'd) 1 Applicant Continued Response Overview
2-71 Air Quality Evaluation 010318
72 Sight Line Section
73-77 Drainage
CQ. 78-121 Applicant Final PowerPoint Presentation
CR. 122 Staff Suggested PW Drainage Amendments, dated 1/10/18
2017-4315
Air Quality Evaluation
Severance Ready Mix & Asphalt
Weld County, Colorado
January 2018
Prepared fora
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CONTRACTORS
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Simon Contractors Company
6215 Clear Creek Parkway
Cheyenne. Wyoming 82007
Prepared by:
Tetra Tech, Inc.
1900 S. Sunset Street, Suite I -E
Longmont. Colorado 80501
Air Quality Evaluation Severance Ready Mix & Asphalt
TABLE OF CONTENTS
1.0 INTRODUCTION 1-1
1.1 Purpose 1-1
1.2 Summary 1-1
2.0 PROJECT DESCRIPTION 2-1
2.1 Project Location 2-1
2.2 Summary of Proposed Project 2-1
2.2.1 Hot Mix Asphalt (HMA) Plant 2-1
2.2.1.1 Dryer Burner 2-4
2.2.1.2 Exhaust Fan 2-4
2.2.1.3 Dryer and Mixer Drums 2-5
2.2.1.4 Primary Collector 2-5
2.2.1.5 Baghouse 2-5
2.2.1.6 Ductwork and Blue Smoke Collection System 2-5
2.2.2 Concrete Batch Plant (Ready -Mix Plant) 2-6
2.2.3 Recycling Operations 2-7
2.2.4 Fugitive Dust Management 2-7
3.0 EMISSIONS ESTIMATES 3-1
3.1 HMA Plant Emissions 3-1
3.1.1 Drum Dryer Emissions 3-1
3.1.2 Material Handling Emissions 3-2
3.1.3 HMA Silo Filling and Truck Loadout Emissions 3-2
3.1.4 Asphalt Cement Storage Emissions 3-3
3.1.5 Summary of HMA Plant Potential Emissions 3-3
3.2 CBP Emissions 3-4
3.3 Recycling Operations Emissions 3-5
3.4 Fugitive Dust Emissions 3-6
3.4.1 Paved Haul Roads 3-6
3.4.2 Front -End Loader Operations 3-8
3.4.3 Wind Erosion of Storage Areas 3-9
3.5 Summary of Calculated Potential Emissions 3-10
4.0 REGULATORY APPLICABILITY EVALUATION 4-1
4.1 Federal New Source Review Preconstruction Permitting 4-1
4.1.1 Prevention of Significant Deterioration (PSD) Permitting 4-1
4.1.2 Nonattainment New Source Review (NNSR) Permitting 4-1
4.2 Federal Title V Operating Permit Program 4-1
4.3 New Source Performance Standards 4-2
4.3.1 40 CFR 60 - Subpart A — General Provisions 4-2
4.3.2 40 CFR 60 - Subpart I — Hot Mix Asphalt Facilities 4-2
4.3.3 40 CFR 60 - Subpart OOO — Nonmetallic Mineral Processing Plants 4-2
4.4 National Emission Standards for Hazardous Air Pollutants (40 CFR Parts 61 and 63) 4-3
4.5 Compliance Assurance Monitoring 4-3
4.6 Chemical Accident Prevention 4-3
4.7 State of Colorado Regulations 4-3
4.7.1 Regulation No. 1. Emissions Control Standards 4-4
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Air Quality Evaluation Severance Ready Mix & Asphalt
4.7.2 Regulation No_ 2. Control of Odor Emissions . 4-4
4.7.3 Regulation No 3. Stationary Source Permitting and APENs 4-4
4.7.4 Regulation No_ 6. New Source Performance Standards 4-4
4.7.5 Regulation No. 7. Control of Ozone Precursors 4-4
4 7 6 Regulation No. 8. Control of Hazardous Air Pollutants 4-5
4.8 Regulatory Analysis Summary 4-5
5.0 AMBIENT AIR QUALITY ANALYSIS 5-1
5.1 Introduction ..... 5-1
5.2 Source Data and Operating Scenarios .. 5-1
5.3 Model Selection 5-3
5.4 Meteorological Data for AERMOD 5-3
5.5 Land Use ......... 5-3
5 6 Good Engineering Practice Stack Height Analysis 5-3
5.7 Receptor Grid and AERMAP Processing 5-5
5.8 Ambient Background Data 5-6
5 9 Modeling Results 5-6
6.0 REFERENCES 6-1
LIST OF TABLES
Table 3-1. Summary of Maximum Short -Term Potential Emission Rates from HMA Plant 3-3
Table 3-2. Maximum Annual Potential Emission Rates from HMA Plant 3-4
Table 3-3. Summary of Potential Emission Rates from CBP Operations 3-5
Table 3-4. Summary of Potential Emission Rates from Recycling Operations 3-6
Table 3-5 Paved Road Emission Factor Parameters 3-7
Table 3-6 Truck Trips 3-7
Table 3-7 Summary of Potential Fugitive Dust Emission Rates from Paved Roads 3-7
Table 3-8. Unpaved Surfaces Emission Factor Parameters 3-8
Table 3-9. Front -End Loader Trips 3-9
Table 3-10. Summary of Potential Fugitive Dust Emission Rates from Unpaved Surfaces 3-9
Table 3-11. Wind Erosion Emission Factor Parameters 3-9
Table 3-12_ Summary of Potential Fugitive Dust Emission Rates from Wind Erosion 3-10
Table 3-13 Maximum Annual Potential Emission Rates from the Project _ _ _ _ _3-10
Table 4-1. CDPHE Potentially Applicable Regulations 4-3
Table 5-1. Comparison of Project Potential Emissions to CDPHE Modeling Thresholds._.__... . 5-1
Table 5-2 NAAQS ......................... ..... .... ....... 5-2
Table 5-3. Ambient Background Air Quality Concentrations 5-6
Table 5-4. Maximum AERMOD-Predicted Concentrations and NAAQS Compliance Assessment5-7
LIST OF FIGURES
Figure 2-1. Site Location 2-2
Figure 2-2. Site Plan 2-3
Figure 2-3_ Representative Schematic Process Flow Diagram for a Counter -Flow Drum Mix HMA Plant
(adapted from USEPA AP -42 Compilation of Air Emission Factors. Figure 11 1-3) 2-4
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Air Quality Evaluation Severance Ready Mix & Asphalt
Figure 2-4. Representative Schematic Process Flow Diagram for a CBP (adapted from USEPA AP -42
Compilation of Air Emission Factors, Figure 11.12-1). 2-6
Figure 5-1. Modeled Source Configuration 5-2
Figure 5-2. Five -Year (1993-1997) Wind Rose of Measurements from Kodak Site, Windsor, Colorado 5-4
APPENDICES
Appendix A Emissions Calculations
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Air Quality Evaluation
Severance Ready Mix & Asphalt
ACRONYMS/ABBREVIATIONS
Acronyms/Abbreviatio
Definition
ns
°F
degrees Fahrenheit
pg/m3
micrograms per cubic meter
AP -42 Compilation of Air Pollutant Emission Factors
APEN Air Pollutant Emissions Notice
AQCR Air Quality Control Region
BAAQMD Bay Area Air Quality Management District
BMP best management practice
BPIP Building Profile Input Program
CAAQS Colorado Ambient Air Quality Standards
CAM compliance assurance monitoring
CBP concrete batch plant
CDPHE Colorado Department of Public Health & Environment
CFR R Code of Federal Regulations
CO carbon monoxide
GEP Good Engineering Practice
H1H highest first high
H2H highest second high
H4H highest fourth high
H6H highest sixth high
H8H highest eighth high
HAP hazardous air pollutant
HHV higher heating value
HMA hot mix asphalt
hp horsepower
km kilometer
kW kilowatt (mechanical)
['mj TETRA TECH IV
Air Quality Evaluation
Severance Ready Mix & Asphalt
Acronyms/Abbreviatio
Definition
ns
lb/hr
pounds per hour
Ib/MMBtu
pounds per million British thermal units
lb/mmscf
pounds per million standard cubic feet
IIMa
pounds per megawatt -hour
MACT I Maximum Achievable Control Technology
million British thermal units per hour
MW megawatt
pimar
hr +,
megawatt -hour
nitrogen gas
N20 nitrous oxide
NAAQS National Ambient Air Quality Standards
NAD83 North American Datum of 1983
NAVD North American Vertical Datum
NESHAP National Emissions Standards for Hazardous Air Pollutants
NO nitrogen oxide
NO: nitrogen dioxide
NOr
nitrogen oxides
NNSR Nonattainment New Source Review
NSPS New Source Performance Standards
NSR New Source Review
ozone
PAH polycyclic aromatic hydrocarbons
Pb lead
PM particulate matter
PM•1
particulate matter with aerodynamic diameter equal to or less than 10 micrometers
PM2 5 particulate matter with aerodynamic diameter equal to or less than 2.5 micrometers
PSD Prevention of Significant Deterioration
(W1 TETRA TECH
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Air Quality Evaluation
Severance Ready Mix & Asphalt
Acronyms/Abbreviatio
Definition
ns
PTE
potential -to -emit
RACT
Reasonably Available Control Technology
RAP
recycled asphalt pavement
scf
standard cubic feet
SIA Significant Impact Area
SIL Significant Impact Level
SIP State Implementation Plan
S02 sulfur dioxide
SOx Sulfur oxides
TLV threshold limit value
tpd tons per day
tph tons per hour
tpy
tons per yearin "ass
TSP total suspended particulate matter
USEPA United States Environmental Protection Agency
USGS United States Geological Survey
VOC volatile organic compounds
ydcubic yards
I I TETRA TECH
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Air Quality Evaluation
Severance Ready Mix & Asphalt
1.0 INTRODUCTION
1.1 PURPOSE
Simon Contractors Company (Simon) is proposing to construct and operate a hot mix asphalt (HMA) plant and a
ready -mix concrete batch plant (CBP) at a site located in Weld County at the intersection of Colorado State Highway
257 and Weld County Road 80.5, near the Town of Severance. The equipment and aggregate storage associated
with these plants would be permanently located at the site. Additionally. recycling equipment will be occasionally
brought on site as needed to satisfy contracts.
The operations associated with the proposed facility are expected to produce air emissions at levels that require
the acquisition of an air quality permit issued by the Colorado Department of Public Health & Environment (CDPHE).
The Project will be a minor source of air emissions with respect to the U S Environmental Protection Agency's
(USEPA) Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR) pre -
construction permit programs and USEPA's Title V Operating Permit program.
The site is located in an area designated as nonattainment for ozone. and attainment for all other criteria pollutants.
The CDPHE follows a rigorous process which requires two submittals from the applicant and thorough review by
the department before issuing approval for construction. The submittals to be filed by Simon include an Air Pollutant
Emissions Notice (APEN) and application for a Construction Permit. Tetra Tech further expects a dispersion
modeling analysis to be a required element of the technical information submitted with the Construction Permit
application.
The Project's air pollutant emissions that will be regulated by the CDPHE's air permitting program include:
particulate matter (PM) with a diameter equal to or less than 10 micrometers (PM 10): PM with a diameter equal to
or less than 2.5 micrometers (PM25): volatile organic compounds (VOC): carbon monoxide (CO): nitrogen oxides
(NOx): sulfur dioxide (SO2): and USEPA and CDPHE Hazardous Air Pollutants (HAP).
The purpose of this air quality evaluation is to provide the technical information requested by the Weld County Board
of County Commissioners to demonstrate that the proposed facility will comply with regulations related to ambient
air quality As such. this report provides:
• A description of the Project's proposed configuration (Section 2):
• An inventory of maximum potential emissions resulting from the Project (Section 3):
• An analysis of applicable regulatory requirements to identify the permitting process to be completed for the
Project and to identify the CDPHE and USEPA air emissions standards imposed on the Project (Section 4);
• An ambient air quality dispersion modeling analysis to show the Project will comply with ambient air quality
standards (Section 5): and
• Detailed emissions calculations (Appendix A).
1.2 SUMMARY
The Project will comply with ambient air quality standards, and will do so by accepting permit limits on operating
conditions and by installing the following air pollution control equipment:
• A baghouse to control PM emissions from the hot mix asphalt operation's drum mixer;
• A blue smoke recovery system to minimize visible emissions and odors from the hot mix asphalt operations,
which will prevent nuisance conditions and meet regulatory visible emissions standards:
• A building housing the concrete batch plant operations. specifically elevated storage bins. weigh hopper
loading and truck loading_ to prevent transport of visible emissions off site. and
• Bin vent filters to minimize emissions from dry material silo loading operations_
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Air Quality Evaluation Severance Ready Mix & Asphalt
In addition to the above emissions controls, the Project will also implement Best Management Practices for the
mitigation of fugitive dust. CDPHE-issued permits explicitly prohibit off -property transport of visible emissions from
processing activities and from haul roads. Fugitive dust mitigation measures will specifically include the following:
• Watering as necessary of sand, aggregate, and recycled material storage areas;
• Watering during loading of materials in sand, aggregate, and recycled material storage areas.
• Watering of recycled materials prior to crushing and screening operations:
• Washing of vehicle tires as needed prior to site departure to prevent track -out to public roadways:
• Use of pre -washed aggregate and sand when practical:
• Adoption of procedures to prevent spillage of materials on roadways, such as covered trucks:
• Use of paved haul roads on the project site:
• Vacuum sweeping and watering of paved haul roads:
• Limitation of vehicle speeds on the site to 5 miles per hour or less
TETRA TECH
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Air Quality Evaluation
Severance Ready Mix & Asphalt
2.0 PROJECT DESCRIPTION
Simon is proposing to construct its Project in Weld County at the intersection of Colorado State Highway 257 and
Weld County Road 80.5, near the Town of Severance. As noted, the equipment and aggregate storage associated
with these plants would be permanently located at the site. Additionally. recycling equipment will be occasionally
brought on site as needed to satisfy contracts.
This section provides a description of the Project location (Section 2.1), and the proposed equipment to be installed
for the Project (Section 2.2).
2.1 PROJECT LOCATION
The Project site is located on a parcel directly east of Colorado State Highway 257 and directly south of Weld
County Road 80.5 as shown in Figures 2-1 and 2-2 The Larimer County Canal comprises the southern boundary
of the site. The site is otherwise surrounded by agricultural land use. The equipment and aggregate storage will
be located on the western portion of the property.
The base elevation of the proposed site is approximately 5.100 feet (NAVD 1988): the site is depicted on the US
Geological Survey (USGS) Timnath topographic map (see Figure 2-1). The topography surrounding the Project
consists of gently sloping terrain. No schools, hospitals, nursing homes. day care or preschool facilities are
identified within 4 miles of the Project.
The Project is located in the USEPA's Pawnee Intrastate Air Quality Control Region (AQCR). The AQCR is
designated as attainment or unclassifiable for all criteria pollutants with the exception of a southern portion of Weld
and Larimer Counties, which is designated nonattainment for the 1997 and 2008 8 -hour ozone National Ambient
Air Quality Standards (NAAQS).
2.2 SUMMARY OF PROPOSED PROJECT
The Project includes HMA and CBP equipment to be installed permanently on site. and pavement recycling
equipment to be located occasionally on site as demand requires Aggregate and sand brought to the site by truck
will be stored in the southern portion of the site. Recycled asphalt pavement (RAP) will also be stored in this area.
The aggregate storage area will serve both the HMA and CBP operations. with a front-end loader used to distribute
materials between the storage area and the HMA and CBP operations. The following sections provide an overview
of these three process areas of the Project.
2.2.1 Hot Mix Asphalt (HMA) Plant
The basic manufacturing process of HMA involves removing free moisture from the aggregate. heating the
aggregate, and coating the aggregate with hot asphalt cement. This can be accomplished in either a dryer and
tower combination (batch facility) or a drum mixer. The proposed facility will be a counter -flow drum mix facility
processing a maximum of 400 tons per hour (tph) of HMA; 5.556 tons per day (tpd): and 500,000 tons per year
(tpy). Figure 2-3 shows a representative schematic process flow diagram of a counter -flow drum mix HMA Plant.
The process is comprised of two separate drums: dryer and mixer. The dryer is set on a slight incline with the
burner at the lower end. The aggregate is fed to the top end of the dryer which rotates, moving the aggregate
through the drum. as the hot gases move up the dryer in the opposite direction. In the dryer, the free moisture is
removed from the aggregate and the heating takes place. The hot dry aggregate leaves the dryer at the burner
end and is then transferred to the mixer. The mixer is where the coating process takes place after the aggregate is
heated, producing HMA. A drag conveyor is used to transfer the resulting HMA to one of the three silos for storage.
A brief overview of each of the major components of the process follows.
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Figure 2-3. Representative Schematic Process Flow Diagram for a Counter -Flow Drum Mix HMA Plant
(adapted from USEPA AP -42 Compilation of Air Emission Factors, Figure 11.1-3).
2.2.1.1 Dryer Burner
The simplest and most economical method of drying and heating the aggregate is with direct heat. A direct -fired
burner is the most effective means of providing the direct heat. The materials to be dried are exposed directly to
radiant and convective heat from the flame and hot gases_ The basic function of the burner is to proportion oxygen
(air) and fuel, and atomize and mix the fuel and oxygen to obtain complete combustion. The burner for the Project
will be fired primarily with propane. with natural gas available as a backup fuel.
2.2.1.2 Exhaust Fan
When HMA facilities were originally designed they operated on a natural draft principle in exhausting combustion
gases and aggregate moisture from the drum. Exhaust fans were added when it became desirable to increase the
production capacity. The increased flow rate of exhaust gases out of the drum increased material processing. In
any system there is a limited amount of volume for the combustion gases and aggregate moisture. The rate of
removal of these gases from the system determines the maximum production rate. The removal rate is adjusted
such that the volume of combustion gases and aggregate moisture generated does not exceed the available drum
volume. As the capacity of the exhaust fan is increased. the volume of gases being moved through the drum
increases (e.g . the system's ability to pull in combustion air and remove moisture and combustion products
increases). Consequently, larger volumes of material can be dried.
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Air Quality Evaluation Severance Ready Mix & Asphalt
2.2.1.3 Dryer and Mixer Drums
There are two processes which take place in the drum: moisture removal and heating. Because of the type and
size of material used in the process, the drum has equipment inside which lifts the aggregate and drops it through
the hot exhaust gases for maximum drying and heating efficiency. Pertaining to the mixer, the process that takes
place in the drum is coating. It is inclined slightly, the discharge end being lower than the feed end, which causes
the mix to move downhill towards the discharge end of the drum.
2.2.1.4 Primary Collector
The primary collector used in the HMA facility is a cyclone. which is an enclosed compartment in which the velocity
of the exhaust gas is reduced sufficiently to allow the particles in the gas stream to slow down and settle by gravity.
Due to size limitations. mostly large particles (greater than 40 microns) may be removed economically with settling
chambers. Because much smaller particles also need to be removed, settling chambers are used mostly as pre -
cleaners, preceding more efficient collection equipment (e.g., baghouse).
2.2.1.5 Baghouse
The baghouse is a dry collector and offers several advantages over wet collectors. One of the biggest advantages
of the baghouse is that the fine dust material it collects can be put back into the mix as filler that is generally required
in mix design specifications. The drum mixer makes it easy to return these fines because it mixes the dust with the
asphalt cement at the same time as the asphalt cement is sprayed into the drum_ This eliminates any re -entrainment
of the fines into the exhaust gas and/or scavenging system as might occur in a batch facility, depending on where
the fines are introduced. There are also none of the concerns about water supply and disposal that accompany the
use of a wet collector and settling basin_ Collector efficiency is inherently superior in a baghouse especially with
respect to fine PM Operation and maintenance of the baghouse is relatively straightforward; whereas, the
efficiency of a scrubber is dependent on proper adjustment of the venturi throat. the liquid -to -gas ratio. regular
maintenance of the spray nozzles or water holes. and operator attention to the state of the operations.
The baghouse or fabric filter dust collector is a simple device It is placed between the drum and the exhaust fan.
where the exhaust gases from the drum are pulled through the baghouse, inducing a draft through the baghouse.
Inside the baghouse are fabric filter bags supported by long, tubular wire cages. As the exhaust gases are pulled
through the filter bags (from the outside to the inside), the dust is caught on the fabric filter the same way that the
filter in a vacuum cleaner collects dust.
The filter bags are fitted over cylindrical wire forms. called cages, which support the filter bag. Cylindrical filter bags
allow a maximum cloth surface area for enclosed space requirements_ The filter bags are assembled in the
baghouse structure under air -tight conditions to eliminate air leakage into the system
Virtually all particles with a diameter larger than 10 microns can be trapped in a well -maintained baghouse. The
collection efficiency for particles between 10 microns and one micron in diameter is still very high with up to 99%
efficiency achieved. The efficiency depends on the particle size, the size distribution, the air -to -cloth ratio (which
determines the pressure drop and the size of particles that will get through the filter bag), and the structure of the
filter (its weave and thickness) The overall collection efficiency of the proposed baghouse is 99.9%.
2.2.1.6 Ductwork and Blue Smoke Collection System
The drum is connected to the rest of the equipment with ductwork through which passes the exhaust gas. The
ductwork is used for the exhaust gas to pass from the drum to the air pollution control equipment, and for the
purposes of carrying the fugitive emissions to the main exhaust system. The plant uses one duct from the drum to
the control equipment and one from the control equipment to the exhaust fan. A blue smoke collection system
captures displaced gases from the storage silos and emissions from the truck loadout area (marked as "PF" in
Figure 2-3 at the top and bottom of the displayed HMA Storage silo). These captured emissions will either be
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TETRA TECH
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Air Quality Evaluation Severance Ready Mix & Asphalt
directed back through the combustion zone of the drum dryer or through another control system to mitigate
emissions from these silos.
2.2.2 Concrete Batch Plant (Ready -Mix Plant)
The basic manufacturing process of a CBP involves mixing sand, aggregate, cement, cement additives and water
to produce concrete. Generally. sand and aggregate are loaded into hoppers which feed enclosed conveyor belts
that carry the materials into an enclosed building where they are deposited into weigh hoppers according to the mix
requested by the customer. Cement and cement additives are also loaded by pneumatic conveying systems into
the weigh hoppers. All of these materials are then loaded into a ready -mix delivery truck along with water within
the building. The rotating drum on the delivery truck mixes the materials to achieve the desired product consistency.
The loaded delivery truck exits the batch building and leaves the premises to deliver the product. Product mixing
continues to occur during transit to the delivery site. Figure 2-4 shows a representative schematic process flow
diagram of a CBP.
TRANSFER TO CONVEYOR
AGGREGATE (SCC 3 05 011 23)
SAND (.SCC 3-05-011-24)
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AGGREGATE (SCC 3 05011-21)
SAND (SCC 3-05-011-22)
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I.OADER
TRANSFER TO ELEVATED STORAGE
AGGREGATE (SCC 3-05-011-04)
SAND (WC 3 -US -011-05)
V
ELEVATED STORAGE
BINS A
CG
0
U
RG
SAND
TRANSIT MIX TRUCK LOADING
(SCC 3-05-011-10)
TRUCK MIXED
PRODUCE
WATER
UNLOADING"! O ELEVATED STORAGE SILO
CEMENT (SCC 3-05-011-07)
CEMENT SUPPLEMENT (SCC 3-05-1111-17)
ELEVATED
CEMENT
AND
SUPPLE:MEN"I
SILO
PNEUMATIC
TRANSFER
BUCKET
MEVSIt)It
S4 K I \N
11\\ IH
WEIGH HOPPER WADING
OF SAND & AGGREGATE
(SCC 3-05-011-08)
("TR 1 Y'K4
Figure 2-4. Representative Schematic Process Flow Diagram for a CBP (adapted from USEPA AP -42
Compilation of Air Emission Factors, Figure 11.12-1).
PM emissions will be reduced by enclosing elevated sand and aggregate storage bins, the weigh hopper. and truck
loading inside a building, which is a very effective method for reducing fugitive dust. The cement and cement
additive silos will be equipped with high efficiency bin vent filters. The aggregate and sand storage area will use a
commercial water spray system to control dust during material handling. The Project will use washed aggregate
and sand when customer specifications allow, further reducing fugitive dust emissions during material handling.
The feed hoppers will be equipped with an enclosed drop to the conveyor to minimize fugitive dust from this activity.
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2.2.3 Recycling Operations
The recycling operation will consist of a portable crusher and portable screen brought on site as needed to size
RAP to meet customer specifications The material to be recycled will be brought to the site by covered truck and
deposited in a designated storage area. A front-end loader will transfer the material from the storage area to the
portable crusher, which will stockpile the processed material in an intermediate storage area. A front-end loader
will transfer the material from the intermediate storage area to the portable screen, which will sort and stockpile the
material into as many as four different size ranges. A front-end loader will then transfer the material to the aggregate
and sand storage area for use by the HMA Plant The recycled material storage areas will use a commercial water
spray system to control dust during material handling and to reduce dust formation in the crushing and screening
operations. Additionally, the crusher and screen will be equipped with water sprays to reduce fugitive dust
formation.
2.2.4 Fugitive Dust Management
The Project will include sand, aggregate, and recycled material storage areas. equipment such as front-end loaders
to transfer material between storage areas and plant areas. and haul roads upon which trucks will travel. Fugitive
dust can be generated in these material storage areas and from haul roads. Best Management Practices (BMPs)
will be used to minimize the formation of fugitive dust emissions from material storage areas and haul roads
Examples of BMPs to be used by the Project include:
• Watering as necessary of sand. aggregate, and recycled material storage areas:
• Watering during loading of materials in sand, aggregate, and recycled material storage areas:
• Watering of recycled materials prior to crushing and screening operations:
• Washing of vehicle tires prior to site departure as needed to prevent track -out to public roadways:
• Use of pre -washed aggregate and sand when practical:
• Adoption of procedures to prevent spillage of materials on roadwayssuch as covered trucks:
• Use of paved haul roads:
• Vacuum sweeping of haul roads: and
• Limitation of vehicle speeds on the site to 5 miles per hour or less.
Implementation of these BMPs is expected to meet CDPHE permit requirements which prohibit off -property
transport of visible fugitive dust emissions.
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3.0 EMISSIONS ESTIMATES
This section describes how emissions from the Project were calculated based upon data supplied by Simon,
emission factors obtained from USEPA's AP -42 Compilation of Air Pollutant Emission Factors (AP -42). and USEPA
emissions models such as TANKS. Detailed emissions calculations are provided in Appendix A.
From a practical perspective relevant to the Project and its emissions. the list of regulated New Source Review
(NSR) pollutants includes the six criteria pollutants for which NAAQS have been established and those pollutants
that are subject to the New Source Performance Standards (NSPS) promulgated pursuant to Section 111 of the
federal Clean Air Act (CAA).
The six criteria pollutants are: sulfur dioxide (SO?). particulate matter (PM). carbon monoxide (CO). ozone (O3),
nitrogen dioxide (NO2), and lead (Pb). Volatile organic compounds (VOCs) and nitrogen oxides (NOx) are included
by virtue of being established by USEPA as ozone precursors. For regulatory purposes, PM is further classified by
particle size. PM2 5 includes all particles with an aerodynamic diameter of less than 2.5 microns_ PM 10 includes all
particles with an aerodynamic diameter of less than 10 microns. Total suspended particulate (TSP) includes
particles of all sizes.
The list of Hazardous Air Pollutants (HAPs) is defined in Section 112(b) of the Clean Air Act_ CDPHE defines
additional HAPs in its Regulation No. 3. From a practical perspective. the HAPs to be emitted from the Project are
subsets of regulated NSR pollutants. particularly trace metals (PM) and trace organics (VOCs).
Annual emissions were calculated for comparison to permitting thresholds, and short-term emissions (durations of
24 hours or less) are also provided. Emissions of regulated NSR pollutants and HAPs were calculated. The
following sections describe how emissions from each Project area were calculated.
3.1 HMA PLANT EMISSIONS
The HMA Plant emission units include the drum dryer and associated burner: the aggregate. lime. and RAP feed
bins; the asphalt cement storage tanks and associated heater; the HMA storage silos, and the HMA truck loadout
area. The facility potential to emit is limited by the proposed operational restriction of 400 tph: 5.556 tpd; and
500,000 tpy. A cyclone and baghouse control PM emissions from the drum dryer. The blue smoke collection
system captures VOC and condensable PM emissions from the HMA storage silos and HMA truck loadout area.
These captured emissions will either be directed back through the combustion zone of the drum dryer or through
another control system to mitigate emissions from these silos. A bin vent filter controls PM emissions from the lime
silo. The drum dryer burner (75 MMBtu/hour) and asphalt cement storage heater (2 55 MMBtu/hr) will primarily
combust propane. with natural gas serving as a backup fuel
3.1.1 Drum Dryer Emissions
Drum dryer emissions are based on emission factors provided in USEPA's AP -42 Compilation of Air Pollutant
Emission Factors. Section 11.1 (USEPA. 2004a). The following tables were used to calculate emissions:
• Table 11 1-3 for PM and PM,.) emissions. with fabric filter control applied (includes filterable and
condensable PM emissions).
• Table 11 1-4 for PM2 5 filterable emissions (as applied to Table 11.1-3 for filterable PM emissions) summed
with Table 11.1-3 PM la condensable emissions:
• Table 11.1-7 for CO. NOx, and SO2 emissions. using natural gas -fired dryer factors:
• Table 11.1-8 for VOC emissions, using natural gas -fired dryer factor:
• Table 11.1-10 for trace hydrocarbons HAP emissions, using natural gas -fired with fabric filter factors; and
• Table 11.1-12 for trace metals HAP emissions, using natural gas -fired with fabric filter factors
lb
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For the purposes of calculating 1 -hour and annual potential emissions, the emission factors were multiplied by the
proposed operational limits of 400 tph and 500,000 tpy. For the purposes of calculating 24 -hour potential emissions
for dispersion modeling purposes. the PM10 and PM2 5 emission factors were multiplied by the proposed operational
limit of 5.556 tpd. The drum dryer emissions will be controlled using a baghouse (fabric filter).
3.1.2 Material Handling Emissions
Material handling emissions of PM. PM10, and PM25 at the HMA Plant are based on emission factors provided in
USEPA's AP -42 Compilation of Air Pollutant Emission Factors, Sections 11.12 (USEPA. 2006a). 11.19.2 (USEPA.
2004b) and 13.2.4 (USEPA, 2006b). Material handling includes dropping of aggregate and RAP at the aggregate
storage area, loading of lime into the lime silo, loading of aggregate. RAP, and lime in the respective HMA Plant
feed bins. and conveyor transfer and drop points_ The following AP -42 tables and equations were used to calculate
emissions:
• Equation 1 in Section 13.2.4.3 for loading operations onto storage piles and feed bins, using the average
wind speed measured at the Windsor Kodak site (6.04 mph) and a material moisture content of 5 percent
(representative of watered operations);
• Table 11.19.2-2 for conveyor transfer points and for the scalping screen. using controlled emission factors
(representative of watered operations);
• Table 11.12-2 for controlled pneumatic loading of the lime storage silo: and
• Table 11.12-2 for uncontrolled loading of lime into the lime feed bin.
For the purposes of calculating 1 -hour and annual potential emissions, the emission factors were multiplied by the
proposed operational limits of 400 tph and 500,000 tpy. For the purposes of calculating 24 -hour potential emissions
for dispersion modeling purposes, the PM10 and PM25 emission factors were multiplied by the proposed operational
limit of 5,556 tpd. The material handling emissions for aggregate and RAP are controlled by the use of water sprays
and covered conveyors. Material handling emissions of lime silo loading are controlled by a bin vent filter on the
top of the silo.
While pre -washed aggregate and sand will be used at the facility when practical. no attempt was made to take credit
for the use of these pre -washed materials. Therefore. the estimate of potential PM emissions from material handling
is expected to be higher than in actual practice.
3.1.3 HMA Silo Filling and Truck Loadout Emissions
Drum dryer emissions are based on emission factors provided in USEPA's AP -42 Compilation of Air Pollutant
Emission Factors, Section 11.1 (USEPA. 2004a). The following tables were used to calculate emissions:
• Table 11.1-14 for PM, PM10. PM25. VOC. and CO emissions (all PM assumed to be less than 2.5 microns):
• Table 11.1-15 for trace polycyclic aromatic hydrocarbon (PAH) and trace semivolatile hydrocarbon HAP
emissions; and
• Table 11.1-16 for trace volatile hydrocarbons HAP emissions.
For the purposes of calculating 1 -hour and annual potential emissions, the emission factors were multiplied by the
proposed operational limits of 400 tph and 500,000 tpy. For the purposes of calculating 24 -hour potential emissions
for dispersion modeling purposes. the PM,o and PM25 emission factors were multiplied by the proposed operational
limit of 5.556 tpd. The silo filling and truck loadout emissions will be controlled using the blue smoke collection
system. The capture efficiency of the blue smoke collection system is greater for the silo filling operation than for
the truck loadout operation due the ability of the system to fully capture emissions escaping the bin vent at the top
of the silo. The VOC, PM, and HAP reductions are 98 percent for silo filling (100 percent capture efficiency. 98
percent control efficiency) and 88.2 percent for truck loadout (90 percent capture efficiency, 98 percent control
efficiency) based on data provided in a California Bay Area Air Quality Management District (BAAQMD) permit
issued in 2012.
it
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3.1.4 Asphalt Cement Storage Emissions
VOC emissions from the asphalt cement storage tanks were calculated using USEPA's TANKS 4.0.9d software
(USEPA, 2001a). The two asphalt cement storage tanks will be of identical vertical tank design and will share the
full production capacity of the facility Because of their identical designs, emissions for only one of the vertical tanks
at full production throughput are calculated_ These emissions are representative of the combined emissions of both
tanks. HAP emissions are calculated as a percentage of VOC emissions based on AP -42 Table 11.1-15 for trace
polycyclic aromatic hydrocarbon (PAH) and trace semivolatile hydrocarbon HAP emissions, and AP -42 Table 11.1-
16 for trace volatile hydrocarbons HAP emissions. A summary of the TANKS inputs and outputs are provided in
Appendix A. as are the detailed TANKS outputs.
A heater with a maximum heat input capacity of 2_55 MMBtu/hr will be used to provide heat to maintain adequate
temperature for the asphalt cement to properly flow. The heater will use propane with natural gas as a backup fuel.
For air permitting purposes. the heater is conservatively assumed to operate at full capacity year-round.
Combustion emissions were calculated based on the maximum heat input capacity of the heater and USEPA's AP -
42 emission factors for propane -fired boilers (AP -42 Section 1.5, USEPA. 2008) and natural gas -fired boilers (AP -
42 Section 1.4. USEPA, 1998). The maximum calculated emission rate of each pollutant for each fuel was used
for the purposes of quantifying potential emissions. thereby allowing the unlimited use of either fuel in the heater.
3.1.5 Summary of HMA Plant Potential Emissions
Potential emissions from the HMA Plant were estimated as described above. Tables 3-1 and 3-2 respectively
summarize estimated maximum short-term (lb/hr) and annual (tpy) potential emissions of criteria pollutants and
total HAP from the HMA Plant. Detailed supporting calculations are provided in Appendix A, including emissions
calculations of individual HAP and CDPHE HAP.
Table 3-1. Summary of Maximum Short -Term Potential Emission Rates from HMA Plant
Pollutant
Drum Dryer
(lb/hr)
Material Handling
(lb/hr)
HMA
and
Silo Filling
Truck Loadout
(lb/hr)
Asphalt
Storage
(lb/hr)
Cement
PM
13.20
1 80
0 02
0 02
PMio
920
075
002
002
PM25
8.85
0 10
0.02
0 02
CO
5200
--
0.54
021
VOC
12.80
--
0.15
0 035
NO,
10 40
--
--
0 36
SO?
1 36
--
--
0.001
Lead (Pb)
0.0002
--
--
0 000001
Federal HAP
2 15
--
0.003
0 0056
it
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Table 3-2. Maximum Annual Potential Emission Rates from HMA Plant
Pollutant
Drum Dryer
(tpY a)
Material Handling
(tpY)
HMA Silo
and Truck
(tpY)
Filling
Loadout
Asphalt
Storage
(tpY)
Cement
Total
(tPY)
PM
825
1.13
0.01
009
948
Milo
5 75
0.47
0 01
0.09
6.32
PMz 5
5.53
0.06
0 01
0 09
5 69
CO
32 50
--
0.34
0 92
33 76
VOC
800
009
015
825
NOx
6 50
--
--
1 59
8 09
SO2
0.85
--
--
0 006
0 86
Lead (Pb)
0.0002
--
0
000005
0_0002
Federal HAP
1 35
0 002
0 02
1 37
a tons per year
3.2 CBP EMISSIONS
Emissions of PM. PM1o, and PM25 at the CBP are based on emission factors provided in USEPA's AP -42
Compilation of Air Pollutant Emission Factors, Sections 11.12 (USEPA, 2006a), 11.19.2 (USEPA, 2004b) and
13.2.4 (USEPA, 2006b). Material handling includes dropping of sand and aggregate at the aggregate storage area,
loading of cement and cement supplement into the three silos. loading of sand and aggregate in the respective CBP
feed bins, and conveyor transfer and drop points. The following AP -42 tables and equations were used to calculate
emissions:
• Equation 1 in Section 13.2.4.3 for loading operations onto storage piles and feed bins, using the average
wind speed measured at the Windsor Kodak site (6.04 mph) and a material moisture content of 5 percent
(representative of watered operations);
• Table 11.12-5 for controlled pneumatic loading of the cement and cement supplement storage silos:
• Table 11.12-5 for weigh hopper loading; and
• Equations 11.12-2 and 11.12-1 for truck loading.
For the purposes of calculating 1 -hour and annual potential emissions. the emission factors were multiplied by the
proposed operational limits of 180 yd3/hr and 100.000 yd3/yr_ For the purposes of calculating 24 -hour potential
emissions for dispersion modeling purposes, the PM10 and PM25 emission factors were multiplied by the proposed
operational limit of 3,333 yd3/day The material handling emissions for sand and aggregate outside the CBP
Building are controlled by the use of water sprays and covered conveyors. Material handling emissions of cement
silo and cement supplement silo loading are controlled by a bin vent filter on the top of the silo. Material handling
emissions that occur within the CBP Building are controlled by water sprays and significantly reduced wind
impingement.
While pre -washed aggregate and sand will be used at the facility when practical. no attempt was made to take credit
for the use of these pre -washed materials Therefore. the estimate of potential PM emissions from material handling
is expected to be higher than in actual practice.
A heater with a maximum heat input capacity of 1.43 MMBtu/hr will be used to provide heat to maintain adequate
temperature for the asphalt cement to properly flow. The heater will use propane with natural gas as a backup fuel.
For air permitting purposes, the heater is conservatively assumed to operate at full capacity year-round.
Combustion emissions were calculated based on the maximum heat input capacity of the heater and USEPA's AP -
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Air Quality Evaluation Severance Ready Mix & Asphalt
42 emission factors for propane -fired boilers (AP -42 Section 1.5. USEPA. 2008) and natural gas -fired boilers (AP -
42 Section 1.4. USEPA. 1998). The maximum calculated emission rate of each pollutant for each fuel was used
for the purposes of quantifying potential emissions. thereby allowing the unlimited use of either fuel in the heater.
Potential emissions from the CBP operations were estimated as described above. Table 3-3 summarizes estimated
maximum short-term (lb/hr) and annual (tpy) potential emissions of criteria pollutants and total HAP from the CBP
operations. Detailed supporting calculations are provided in Appendix A. including emissions calculations of
individual HAP and CDPHE HAP
Table 3-3. Summary of Potential Emission Rates from CBP Operations
Pollutant
CBP Operations
(lb/hr)
CBP Operations
(tpy)
PM
0 93
0.30
PM•
0.43
0.16
PM..
007
007
CO
0 12
0.52
VOC
002
007
NOx
0 20
0.89
SO7
0.0008
0.004
Lead (Pb)
0.0000007
0.000003
Federal HAP
0 003
0 01
3.3 RECYCLING OPERATIONS EMISSIONS
Emissions of PM PMio, and PM25 at the portable recycling operations are based on emission factors provided in
USEPA's AP -42 Compilation of Air Pollutant Emission Factors, Sections 11.19.2 (USEPA. 2004b) and 13.2.4
(USEPA. 2006b). Material handling includes the crusher and screen as well as dropping of RAP at the crusher
feed storage area. the intermediate screen feed storage areas, and the size -sorted storage area. Handling of RAP
beyond this point is accounted for in the HMA Plant emissions calculations. The following AP -42 tables and
equations were used to calculate emissions
• Equation 1 in Section 13.2 4.3 for loading operations onto storage piles. using the average wind speed
measured at the Windsor Kodak site (6.04 mph) and a material moisture content of 5 percent
(representative of watered operations); and
• Table 11.19.2-2 for controlled crusher and screen operations.
For the purposes of calculating 1 -hour and annual potential emissions. the emission factors were multiplied by the
proposed operational limits of 150 tph and 100,000 tpy. For the purposes of calculating 24 -hour potential emissions
for dispersion modeling purposes. the PM,c, and PM2 5 emission factors were multiplied by the proposed operational
limit of 3.600 tpd The material handling emissions are controlled by the use of water sprays and covered conveyors.
Potential emissions from the recycling operations were estimated as described above. Table 3-4 summarizes
estimated maximum short-term (lb/hr) and annual (tpy) potential emissions of criteria pollutants and total HAP from
the recycling operations. Detailed supporting calculations are provided in Appendix A.
it]
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Air Quality Evaluation Severance Ready Mix & Asphalt
Table 3-4. Summary of Potential Emission Rates from Recycling Operations
Pollutant
Recycling
Operations
(lb/hr)
Recycling
Operations
(tpy)
PM
085
028
PM10
0.34
0 11
PMT5
005
002
3.4 FUGITIVE DUST EMISSIONS
Emissions of PM. PM1o. and PM2 5 from paved haul roads. front-end loader movements on unpaved surfaces, and
the wind erosion of storage areas are based on equations provided in USEPA's AP -42 Compilation of Air Pollutant
Emission Factors, Section 13.2.1 for paved roads (USEPA, 2011) and 13.2.2 for unpaved surfaces (USEPA.
2006b). and USEPA's report, Control of Open Fugitive Dust Sources (USEPA. 1988) for wind erosion of active
storage piles.
3.4.1 Paved Haul Roads
Paved roads will be constructed on the Project site for trucks delivering raw materials and those shipping HMA and
concrete. For paved roads, two equations from AP -42 Section 13.2.1 were used to calculate short-term and annual
PM emission factors.
For short-term emissions calculations (24 -hour duration or less) (Equation 1)
E = kx(sL)'0 a1xW1 02
Where E = PM emission factor:
k = particle size multiplier:
sL = road silt surface loading; and
W = average weight of the vehicles traveling the road.
For annual emissions calculations (Equation 2):
E = [kx(sL)°91xW1 :2 x(1 P/4N)
Where E = PM emission factor:
k = particle size multiplier:
sL = road silt surface loading:
W = average weight of the vehicles traveling the road:
P = number of wet days with at least 0.01 inches of precipitation in the averaging period: and
N = number of days in the averaging period.
Table 3-5 provides the parameter values used in the paved road calculations.
Trucks delivering raw materials to the HMA Plant and hauling HMA away from the HMA Plant will use the
northernmost haul road on the site. traversing from the east entrance to the west exit. Trucks delivering raw
materials to the CBP and aggregate storage area and hauling concrete away from the CBP will use the haul road
loop, traversing from the east entrance southward, westward. and northward to the west exit. Trucks delivering
RAP will enter at the east entrance, traverse eastward to the RAP storage area, and then exit following the same
route. Details on the truck weight calculation are provided in Appendix A.
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Table 3-5. Paved Road Emission Factor Parameters
Parameter
Value
Basis
k (PM)
0 011
AP -42, Section 13.21
k (PM,o)
0 0022
AP -42, Section 13.2.1
k (PM 5)
0 00054
AP -42, Section 13.2 1
sL
12 g/m2
AP -42, Section 13.2 1
W
25.6 tons
CBP & Aggregate Storage Route
W
31 8 tons
HMA Route
W
18.5 tons
RAP Delivery Route
P
54 days
National Climatic Data Center (NCDC). Fort Collins, 1981-2010
N
365 days
Days per year
Table 3-6 provides the number of daily trips for each of the truck purposes, as well as the trip length for each.
Additional calculations are provided in Appendix A.
Table 3-6. Truck Trips
Truck
Trip Length
Daily Trips
Sand & Aggregate Delivery
1.749 feet
75
RAP Delivery
1.649 feet
40
Lime Delivery
546 feet
2
Asphalt Cement Delivery
546 feet
12
HMA Haul Out
546 feet
250
Cement & Supplement Delivery
1,749 feet
5
Concrete Haul Out
1.749 feet
335
The calculated emission factors are multiplied by the calculated distance traveled for the trucks to calculate the PM
emissions from the haul roads. A control efficiency of 97.5 percent was applied to account for the BMPs described
previously in Section 2.2.4 per the Western Regional Air Partnership's (WRAP) Fugitive Dust Handbook (WRAP,
2006). Table 3-7 summarizes estimated maximum short-term (lb/hr) and annual (tpy) potential emissions of fugitive
dust from the paved roads. Detailed supporting calculations are provided in Appendix A.
Table 3-7. Summary of Potential Fugitive Dust Emission Rates from Paved Roads
Pollutant
Paved Roads
(lb/hr)
Paved Roads
(tpy)
PM
0 95
0 48
PMio
0 19
0 10
PM25
0 05
0 02
lb
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3.4.2 Front -End Loader Operations
Front-end loaders will be used to move aggregate and RAP between storage areas and operations The loaders
will traverse unpaved surfaces while distributing materials. For unpaved surfaces, two equations from AP -42
Section 13 2.2 were used to calculate short-term and annual PM emission factors.
For short-term emissions calculations (24 -hour duration or less) (Equation la):
E = kx(s/12)ax(W/3)b
Where E = PM emission factor:
k = particle size multiplier,
s = surface material silt content; and
W = average weight of the vehicles traversing the surface.
For annual emissions calculations (Equation 2):
E = [kx(s/12)ax(W/3)bjx[(365-P)/365]
Where E = PM emission factor;
k = particle size multiplier.
Ls = surface material silt content:
W = average weight of the vehicles traversing the surface; and
P = number of wet days with at least 0 01 inches of precipitation in the averaging period.
Table 3-8 provides the parameter values used in the unpaved surfaces calculations.
Table 3-8. Unpaved Surfaces Emission Factor Parameters
Parameter
Value
Basis
k (PM)
4 9
AP -42. Section 13.2.2
k (PM1o)
1 5
AP -42, Section 13 2 2
k (PM25)
0.15
AP -42, Section 13.2.2
a (PM)
0 7
AP -42, Section 13.2.2
a (PM,o)
0.9
AP -42. Section 13 2 2
a (PM25)
0.9
AP -42. Section 13 2 2
b
0.45
AP -42, Section 13.2.2
s
4 8%
AP -42. Section 13 2.2
W
20 tons
Average Loader Weight
P
54 days
National Climatic Data Center (NCDC). Fort Collins, 1981-2010
Table 3-9 provides the number of hourly trips for each of the front-end loader purposes, as well as the trip length
for each. Additional calculations are provided in Appendix A.
The calculated emission factors are multiplied by the calculated distance traveled for the loaders to calculate the
PM emissions from the unpaved surfaces. A control efficiency of 97.5 percent was applied to account for the BMPs
described previously in Section 2.2.4 per the Western Regional Air Partnership's (WRAP) Fugitive Dust Handbook
(WRAP, 2006) Table 3-10 summarizes estimated maximum short-term (lb/hr) and annual (tpy) potential emissions
of fugitive dust from the unpaved surfaces. Detailed supporting calculations are provided in Appendix A.
•
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Table 3-9. Front -End Loader Trips
Storage Area
Trip Length
Hourly Trips
RAP Crusher Feed
400 feet
30
RAP Screen Feed
400 feet
30
RAP Storage
400 feet
30
HMA Aggregate Feed
400 feet
60
HMA RAP Feed
400 feet
15
CBP Sand & Aggregate Feed
400 feet
59
Table 3-10. Summary of Potential Fugitive Dust Emission Rates from Unpaved Surfaces
Pollutant
Unpaved
(lb/hr)
Surfaces
Unpaved Surfaces
(tpy)
PM
2.57
091
PM. ;
0 65
0 23
PM? i,
0 07
0 02
3.4.3 Wind Erosion of Storage Areas
The sand. aggregate. and RAP piled in the various storage areas on site are occasionally subject to wind gusts that
can potentially produce fugitive dust emissions. For wind erosion of continuously active storage piles. an equation
from USEPA's Control of Open Fugitive Dust Sources (USEPA. 1988) was used:
E = 1.7x(s/1. 5)x[(365-P)/235]x(f/15)
Where E = PM emission factor:
s = silt content of aggregate:
P = number of wet days with at least 0.01 inches of precipitation per year: and
f = percentage of time that the unobstructed wind speed exceeds 5.4 m/s (12 mph).
Table 3-11 provides the parameter values used in the unpaved surfaces calculations
Table 3-11. Wind Erosion Emission Factor Parameters
Parameter
Value
Basis
s
4 8%
AP -42. Section 13.2 2
P
54 days
National Climatic Data Center (NCDC). Fort Collins, 1981-2010
f
11 4%
wind speed frequency measured at the Windsor Kodak site
The calculated emission factors are multiplied by the surface area of each storage pile to calculate the PM emissions
from wind erosion. Each storage pile was assumed to have a diameter of 20 meters and a height of 3.05 meters,
resulting in an average surface area of 95.8 m2 per storage pile. A control efficiency of 70 percent was applied to
it)
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account for the BMPs described previously in Section 2.2.4 per the Western Regional Air Partnership's (WRAP)
Fugitive Dust Handbook (WRAP. 2006) Table 3-12 summarizes estimated maximum short-term (lb/hr) and annual
(tpy) potential emissions of fugitive dust resulting from wind erosion. Detailed supporting calculations are located
in Appendix A.
Table 3-12. Summary of Potential Fugitive Dust Emission Rates from Wind Erosion
Pollutant
Wind
(lb/hr)
Erosion
Wind Erosion
(tpy)
PM
0 02
0.07
PM -
0.008
0 04
PM; •-;
0 001
0.005
3.5 SUMMARY OF CALCULATED POTENTIAL EMISSIONS
A summary of calculated potential emissions for the Project is provided in Table 3-13. A more detailed summary
of pollutant emissions is provided in Appendix A along with detailed emission calculations.
Table 3-13. Maximum Annual Potential Emission Rates from the Project
Pollutant
HMA
(MY)
Plant
CBP
Operations
(MY)
Recycling
Operation
(MY)(tpY)
Fugitive
Sources
Dust
Total
(MY)
PM
9.48
0.30
0 28
1.46
11.52
PMio
632
016
011
0.36
696
PM2 5
5.69
007
002
005
583
CO
33.76
0.52
--
--
34.28
VOC
8.25
0.07
--
--
8 32
NOx
8.09
0.89
-
--
8 98
SO2
0.86
0 004
--
0.86
Lead (Pb)
0.0002
0 00005
--
0 0002
Federal HAP
1 37
0 01
--
1.38
a tons per year
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4.0 REGULATORY APPLICABILITY EVALUATION
This section contains an analysis of the applicability of federal and state air quality regulations to the Project. The
specific regulations and programs that are included in this review include:
• Federal New Source Review (NSR), including the PSD and NNSR permitting programs,
• Federal New Source Performance Standards (NSPS):
• Federal National Emissions Standards for Hazardous Air Pollutants (NESHAP), and
• CDPHE permitting and emissions standards requirements.
4.1 FEDERAL NEW SOURCE REVIEW PRECONSTRUCTION PERMITTING
The Federal New Source Review permitting program requires the emissions from a project be reviewed and
permitted prior to its construction. These programs apply to projects that have estimated potential emissions that
exceed major source thresholds. In determining the applicability of these federal permitting programs. air pollution
controls are considered in the calculation of potential emissions
4.1.1 Prevention of Significant Deterioration (PSD) Permitting
PSD permitting requirements apply to the criteria pollutants: PM, PM,u, PM2 s. CO. VOC, SO2. NO2, and Pb as well
as other NSR Regulated Pollutants. The PSD permitting requirements do not apply to HAPs. The PSD regulations
specify that any major new stationary source within an air quality attainment area must undergo PSD review and
obtain applicable federal and state preconstruction air permits prior to the commencement of construction. The
PSD regulations apply to:
• Any source type listed in any of 28 designated industrial source categories having potential emissions of
100 tpy or more of any pollutant regulated under the CAA: or
• Any other source having potential emissions of 250 tpy or more of any pollutant regulated under the CAA_
The Project will be located in Weld County, which is designated as attainment or unclassifiable for all criteria
pollutants with the exception of the southern portion of the county which is designated nonattainment for the 8 -hour
ozone NAAQS. The Project is located in the ozone nonattainment area. Sources with emissions of the attainment
pollutants exceeding the PSD applicability thresholds noted above would be required to obtain a PSD permit prior
to commencing construction.
The Project is not classified as belonging to one of the 28 designated industrial source categories and is therefore
subject to the 250 tpy applicability threshold. Based on the design criteria and calculated potential to emit, as
summarized in Table 3-13, the Project will not be subject to PSD permitting requirements.
4.1.2 Nonattainment New Source Review (NNSR) Permitting
The NNSR program regulates major sources located in areas that are nonattainment for one or more criteria
pollutants. As noted above, the Project is located in the portion of Weld County which is designated nonattainment
for the 8 -hour ozone NAAQS. The major source emissions threshold for this ozone nonattainment area is 100 tpy
of VOC or NOx. Based on the design criteria and calculated potential to emit. as summarized in Table 3-13, the
Project will not be subject to NNSR permitting requirements
4.2 FEDERAL TITLE V OPERATING PERMIT PROGRAM
The Title V Operating Permit program requires major sources to apply for a Title V Operating Permit within 12
months of beginning operation. Under Title V, a major source is defined as those facilities that have the potential
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to emit greater than 100 tons per year of any criteria pollutant, 25 tons per year of HAPs collectively. and 10 tons
per year of an individual HAP. The Project will be a minor source for criteria pollutants and HAPs based on the
potential emissions summarized in Table 3-13. Therefore. a Title V Operating Permit will not be required for the
Project.
4.3 NEW SOURCE PERFORMANCE STANDARDS
NSPS are technology -based standards promulgated under Title 40 of the Code of Federal Regulations (40 CFR)
Part 60 (40 CFR 60) that are applicable to new and modified stationary sources depending upon the type and size
of the source. NSPS have been established for approximately 70 source categories. Based upon a review of the
NSPS, the following standards were reviewed for applicability to the Project:
• Subpart A — General Provisions:
• Subpart I - Standards of Performance for Hot Mix Asphalt Facilities: and
• Subpart OOO - Standards of Performance for Nonmetallic Mineral Processing Plants.
Subpart F. which applies to the manufacture of portland cement. does not apply to the Project because it engages
in the production of concrete and not cement. Likewise. Subpart UU, which applies to asphalt processing and the
manufacture of asphalt roofing. does not apply to the Project because it engages in the production of hot mix asphalt
and not asphalt flux or asphalt roofing materials.
4.3.1 40 CFR 60 - Subpart A — General Provisions
Any source subject to an NSPS is also subject to the general provisions under 40 CFR 60 Subpart A. Because the
Project is subject to other Subparts of the regulation. the requirements of 40 CFR 60 Subpart A will also apply
These requirements include notification of the start of construction, notification of the start of operation. performance
emissions testing, monitoring, recordkeeping, and reporting. The Project will comply with the applicable
notifications. performance testing, recordkeeping. and reporting requirements in 40 CFR 60 Subpart A.
4.3.2 40 CFR 60 - Subpart I - Hot Mix Asphalt Facilities
40 CFR 60 Subpart I applies to all new hot mix asphalt facilities constructed after June 11, 1973. The NSPS
imposes standards for PM and visible emissions (opacity). The PM standard is 0.04 gr/dscf and the opacity limit is
20 percent. Compliance with the PM standard is demonstrated by performing a source test using USEPA Reference
Method 5. Compliance with the opacity standard is demonstrated by performing visible emissions testing using
USEPA Reference Method 9. The Project will include a baghouse and blue smoke collection system such that PM
and visible emissions will comply with the 40 CFR 60 Subpart I standard.
4.3.3 40 CFR 60 - Subpart OOO - Nonmetallic Mineral Processing Plants
The Recycling Operations are potentially subject to 40 CFR 60 Subpart OOO. specifically the crusher and screen.
However, the Recycling Operations consist of portable equipment which is defined by the rule as:
"...any nonmetallic mineral processing plant that is mounted on any chassis or skids and may be moved by
the application of a lifting or pulling force. In addition. there shall be no cable. chain, turnbuckle, bolt or
other means (except electrical connections) by which any piece of equipment is attached or clamped to any
anchor, slab, or structure. including bedrock that must be removed prior to the application of a lifting or
pulling force for the purpose of transporting the unit."
The rule provides an exemption for portable equipment with capacities of 150 tons per hour or less. The Project
will employ equipment with a maximum capacity of 150 tons per hour, and therefore 40 CFR 60 Subpart OOO will
not apply to the Project.
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4.4 NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR
POLLUTANTS (40 CFR PARTS 61 AND 63)
National Emission Standards for Hazardous Air Pollutants (NESHAPs) apply to specific pollutants. as codified in 40
CFR 61, and to specific source categories, as codified in 40 CFR 63, NESHAPs for Source Categories. The
regulations in 40 CFR 63 contain standards for maximum achievable control technology (MACT) that apply mainly
to major sources of HAP emissions — defined as a stationary source that has the potential to emit 10 tpy of any
single HAP or 25 tpy of any combination of HAPs However, in a few instances. MACT standards have been
promulgated for HAP area sources (e.g.. engines and boilers).
None of the NESHAPs regulations apply to the proposed facility. 40 CFR 63 Subpart LLL, which applies to the
manufacture of portland cement. does not apply to the Project because it engages in the production of concrete
and not cement. Likewise. 40 CFR 63 Subparts LLLLL and AAAAAAA. which apply to asphalt processing and the
manufacture of asphalt roofing. do not apply to the Project because it engages in the production of hot mix asphalt
and not asphalt flux or asphalt roofing materials.
4.5 COMPLIANCE ASSURANCE MONITORING
The Compliance Assurance Monitoring (CAM) Rule. 40 CFR 64. was written to provide "reasonable assurance" of
continuous compliance with emissions limitations or standards in cases where the underlying requirement for an
emissions unit does not require continuous emissions monitoring and for units that are part of major sources that
have Title V operating permits. The CAM rule applies to a pollutant -specific emissions limit for a unit at a major
source required to have a Title V permit if the unit satisfies all of the applicability criteria. The Project will not be
subject to the Title V Operating Permit program. Therefore. CAM does not apply to the Project.
4.6 CHEMICAL ACCIDENT PREVENTION
The Chemical Accident Prevention provisions in 40 CFR 68 apply to facilities that have more than a threshold
quantity of a regulated toxic or flammable substance in a process [40 CFR §68.10(a)]. The Project will not conduct
any activities involving more than a threshold quantity of a regulated substance, including any use. storage,
manufacturing, handling, or on -site movement of such substances, or combination of these activities.
4.7 STATE OF COLORADO REGULATIONS
In addition to regulations already discussed in preceding sections. state regulations [Code of Colorado Regulations
(CCR)] that potentially pertain to this Project are listed in Table 4-1. Further discussion of the applicable regulations
is provided
Table 4-1. CDPHE Potentially Applicable Regulations
Rule
Description
5 CCR 1001-2
Common Provisions Regulation (Definitions. General Provisions, etc )
5 CCR 1001-3
Regulation No 1. Emission Control Standards for PM. CO. SOx, and Opacity
5 CCR 1001-4
Regulation No 2. Control of Odor Emissions
5 CCR 1001-5
Regulation No 3 Stationary Source Permitting and APENs
5 CCR 1001-8
Regulation No 6. New Source Performance Standards
5 CCR 1001-9
Regulation No. 7. Control of Ozone Precursors (VOC and NOx RACT)
5 CCR 1001-10
Regulation No. 8, Control of Hazardous Air Pollutants
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4.7.1 Regulation No. 1, Emissions Control Standards
Regulation No. 1 adopts emissions standards for visible emissions, PM. SO2. and CO. The regulation also
establishes continuous emissions monitoring requirements for select sources. While the Project will not be subject
to the continuous emissions monitoring requirements. several of the emissions standards will apply.
Visible emissions are not allowed to exceed 20 percent opacity, based on 24 consecutive opacity readings taken
at 15 -second intervals over a period of 6 minutes using USEPA Reference Method 9.
PM emissions are established for fuel -burning equipment, manufacturing processes, and fugitive sources including
plant roadways, and storage and handling of materials. The baghouse, bin vent filters, blue smoke collection
system. operation of much of the CBP equipment within a building, the use of propane and natural gas fuels in
combustion equipment, and the adoption of best management practices for mitigating fugitive dust emissions will
allow PM emissions to readily meet these emission standards.
SO2 emissions are limited to not more than 2 tons per day. The Project will use propane and natural gas fuels, and
will readily comply with the emission limit as potential emissions are less than 1 ton per year.
The CO emissions standards are specific to refinery process units and do not apply to the Project
4.7.2 Regulation No. 2, Control of Odor Emissions
Regulation No. 2 adopts odor standards. including Part A general provisions that apply to all emission sources. The
baghouse and blue smoke collection system will allow the Project to meet the odor standards.
4.7.3 Regulation No. 3, Stationary Source Permitting and APENs
Regulation No. 3 specifies the permitting requirements for both major and minor stationary sources. CDPHE
provides Specialty APEN forms to be completed for each of the Project's main areas.
• For the HMA Plant. Form APCD-225, Asphalt Paving Materials Plant APEN and Application for Construction
Permit:
• For the CBP, Form APCD-224. Concrete Batch Plant APEN and Application for Construction Permit: and
• For the Recycling Operation. Form APCD-221, Crusher/Screen APEN and Application for Construction
Permit.
The forms require information regarding production rates. pre -control emission rates. and post -control emission
rates. The CDPHE reviews these forms. along with the information provided in technical support documentation.
to prepare draft Construction Permits that are posted for public review for a period of 30 days_
4.7.4 Regulation No. 6, New Source Performance Standards
Part A of Regulation No. 6 adopts the federal NSPS by reference. The Project was previously identified to be
subject to 40 CFR 60 Subparts A. I. and IIII. Part B of Regulation No. 6 includes emissions standards for new fuel -
burning equipment, new manufacturing processes, and new sources of sulfur dioxide. Emissions from the Project
equipment will meet all of these emissions standards.
4.7.5 Regulation No. 7, Control of Ozone Precursors
Regulation No. 7 adopts VOC and NOx emissions standards for sources located within the ozone nonattainment
area. As stated previously, the Project is located in the portion of Weld County that is designated nonattainment
for ozone. All new sources are to utilize controls representing RACT pursuant to Regulation No. 7 and Regulation
No. 3, Part B, Section III.D. Due to the Project's proposed limits on fuel use and emissions RACT will not require
control of VOC or NOx emissions_
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4.7.6 Regulation No. 8, Control of Hazardous Air Pollutants
Part A and Part E of Regulation No_ 8 respectively adopt the federal 40 CFR 61 and 40 CFR 63 NESHAPs by
reference. The Project was previously identified to not be subject to these federal rules. The Project is not subject
to any of the additional parts of Regulation No. 8.
4.8 REGULATORY ANALYSIS SUMMARY
In summary. the Project will be subject to the following requirements:
• The Project will be required to submit an APEN and obtain a Construction Permit under CDPHE Regulation
No. 3:
• The HMA Plant will be subject to the Federal NSPS at 40 CFR 60 Subpart I.
• The HMA Plant will be subject to the Federal NSPS at 40 CFR 60 Subpart A.
• The Project will be subject to the CDPHE emissions standards at Regulation No. 1; and
• The Project will be subject to the CDPHE odor standards at Regulation No 2
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5.0 AMBIENT AIR QUALITY ANALYSIS
5.1 INTRODUCTION
An ambient air quality dispersion modeling analysis for the Project has been conducted using procedures specified
in the USEPA's Guideline on Air Quality Models (USEPA. 2017) and CDPHE's Modeling Guideline for Air Quality
Permits (CDPHE, 2011). The Project's potential short-term emissions of PM ,o. PM2 5, CO, NOx, and SO2 are greater
than the modeling thresholds identified in Table 1 of the CDPHE's guideline Additionally, the Project's potential
annual emissions of PM25 are greater than the modeling thresholds. Comparison of Project emissions to the
CDPHE modeling thresholds is presented in Table 5-1.
Table 5-1. Comparison of Project Potential Emissions to CDPHE Modeling Thresholds
Pollutant
Project Potential
Emissions (lb/hr)
CDPHE Modeling
Threshold (lb/hr)
Project Potential
Emissions (tpy)
CDPHE Modeling
Threshold (tpy)
PM -T.,
171 lb/day
82 lb/day
6 96
15
PM:5
130 lb/day
11 lb/day
5 83
5
CO
52.87
23
34.28
100
NOx
10 97
0.46
8.98
40
SO2
1.36
0.46
0.86
40
Lead (Pb)
0 0004
--
0.0002
0 0125 (3 months)
The dispersion modeling for the Project evaluates worst -case operating conditions to predict the appropriate
maximum ground -level concentration for each pollutant and averaging period. The modeled cumulative impacts
are added to ambient monitored background concentrations and the sum is compared to the NAAQS. The NAAQS
are established for the criteria air pollutants by the USEPA in accordance with the Federal Clean Air Act to protect
public health and public welfare. Section 302(h) of the Clean Air Act defines "welfare" to include effects on soils,
water, crops, wildlife, weather, damage to and deterioration of property, effects on economic values. and personal
comfort and well-being. Table 5-2 provides the NAAQS as well as the modeling rank basis, as defined by USEPA,
used for the assessment of this Project's compliance with the various criteria.
NOx emissions from the Project sources are released primarily in the form of NO. and these emissions convert to
NO2 in the atmosphere. The NO2 impact analysis utilized the default Tier 2 NOx to NO2 conversion rates (Ambient
Ratio Method [ARM] and ARM2). The Tier 2 approaches assume NOx converts to NO2 at a rate consistent with a
conservative NO2/NOx ambient ratio.
5.2 SOURCE DATA AND OPERATING SCENARIOS
Modeled emissions include PM emissions from all facility operations including material storage and handling as well
as combustion emissions from the HMA drum dryer baghouse. asphalt cement silos heater, and CBP water heater.
Emission sources and rates were identified in Section 3.
For the purposes of PM10 and PM25 dispersion modeling. the maximum 24 -hour emission rates were modeled
rather than the maximum 1 -hour emission rates. For CO. NO2 and SO2, the maximum 1 -hour emission rate was
modeled. The modeling did not impose an operational restriction on the time of day. Emissions released through
a stack or vent were modeled as point sources. Emissions from material handling operations (drop points) were
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Table 5-2. NAAQS
Pollutant
Averaging
Period
NAAQS
(pg/m3) a
Rank for NAAQS
Assessment
PM25
24 -hour
35
H8H b (5 -year Average)
Annual
12
H 1 H c (5 -year Average)
PM,o
24 -hour
150
H6H d over 5 years
CO
1 -hour
40,000
H2H e
8 -hour
10,000
H2H
NO2
1 -hour
188
H8H (5 -year Average)
Annual
100
H 1 H
SO2
1 -hour
196
H4H 1(5 -year Average)
3 -hour
1,300
H2H
24 -hour
365
H2H
Annual
80
H1H
H
a micrograms per cubic meter
b H8H = highest eighth high.
`H1H = highest first high.
d H6H = highest sixth high.
e H2H = highest second high.
H4H = highest fourth high.
modeled as volume sources. The haul roads were modeled as line sources. The front-end loader activity and the
wind erosion emissions were modeled as area sources. Model input parameters for fugitive dust sources were
based on guidance provided in the National Sand, Stone, and Gravel Association's (NSSGA) Modeling Fugitive
Dust Sources with AERMOD (NSSGA, 2007). Detailed model inputs are provided in Appendix A. Figure 5-1 shows
the modeled source configuration.
Figure 5-1. Modeled Source Configuration
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5.3 MODEL SELECTION
The most recent version of the American Meteorological Society/Environmental Protection Agency Regulatory
Model (AERMOD) was used in this modeling analysis. AERMOD is EPA's preferred near -field dispersion modeling
system for a wide range of regulatory applications. The AERMOD modeling system includes four regulatory
components: AERMOD, AERMAP (terrain processor). AERMET (meteorological processor), and BPIP-Prime
(building input processor). For this analysis, meteorological data was provided by CDPHE and AERMET was
therefore not required. The current versions of AERMOD (Version 16216r) and AERMAP (Version 11103) have
been used.
5.4 METEOROLOGICAL DATA FOR AERMOD
A 5 -year hourly AERMOD-ready meteorological data set was obtained from the CDPHE to use for input to
AERMOD. The data were processed by CDPHE and consist of hourly surface observations of wind speed and
direction collected at the Kodak site located in Windsor. Colorado, and upper air data collected by the National
Weather Service (NWS) in Denver, Colorado for the period 1993 through 1997. The meteorological data were
collected approximately 8 miles south of the Project site. A wind rose plot depicting how wind speed and direction
as distributed for this meteorological data set is provided in Figure 5-2 (the wind rose depicts the direction from
which the wind is blowing).
5.5 LAND USE
A land use determination has been made following the classification technique suggested by Auer in accordance
with USEPA and CDPHE modeling guidance. The classification determination was conducted by assessing land
use categories within a 3 -km radius of the Project Site_ Review of the 3 -km area indicates that the area within the
3 -km radius can be characterized as rural. Therefore, rural dispersion coefficients were used in the air quality
modeling analysis
5.6 GOOD ENGINEERING PRACTICE STACK HEIGHT ANALYSIS
A Good Engineering Practice (GEP) stack height analysis has been performed based on the Project structures to
determine the potential for building -induced aerodynamic downwash for the proposed stacks_ The analysis
procedures described in USEPA's Guidelines for Determination of Good Engineering Practice Stack Height (USEPA
1985) and CDPHE guidance have been used.
The "GEP stack height" is defined as the greater of 65 meters or the formula height. The "formula height" is based
on the observed phenomena of disturbed atmospheric flow in the immediate vicinity of a structure resulting in higher
ground -level concentrations at a closer proximity than would otherwise occur. It identifies the minimum stack height
at which significant aerodynamic downwash is avoided.
The GEP formula stack height. as defined by USEPA in the 1985 final regulation. is calculated as follows:
HGEP = HSLDG + 1.5L
Where:
• HGEP is the calculated GEP formula height:
• HBL DC; is the height of the nearby structure; and
• L is the lesser dimension (height or projected width) of the nearby structure.
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SOUTH
WIND SPEED
(m/s)
>= 11.10
8.80 - 11.1C
5.70 - 8.80
3.60 - 5.70
2.10 - 3.60
III 0.50-2.10
Calms: 1.67%
Figure 5-2. Five -Year (1993-1997) Wind Rose of Measurements from Kodak Site, Windsor, Colorado
•
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Both the height and width of the structure are determined from the frontal area of the structure projected onto the
plane perpendicular to the direction of the wind. The GEP stack height is based on the plane projection of any
structure that results in the greatest calculated height. For the purpose of the GEP analysis. nearby refers to the
"sphere of influence" defined as 5 times L (the lesser dimension — height or projected width — of the nearby
structure). downwind from the trailing edge of the structure.
The USEPA's Building Profile Input Program (BPIP-Prime, v04274) that is appropriate for use with the PRIME
algorithms in AERMOD has been used. The building dimensions and coordinates for each potentially influencing
structure were input to BPIP-Prime to determine direction -specific building dimension data for input to AERMOD.
The exhaust emissions of the stacks below their calculated GEP heights will experience the aerodynamic effects of
downwash. For each stack the controlling structures can differ by wind direction, and wind -direction specific building
dimensions are generated by BPIP-Prime for input to AERMOD. AERMOD then accounts for potential downwash
from nearby structures in the dispersion calculations. The PRIME algorithms in AERMOD calculate the dimensions
of the structure's wake, from the cavity immediately downwind of the structure to the far wake.
5.7 RECEPTOR GRID AND AERMAP PROCESSING
Discrete receptors are placed at intervals of less than 10 meters along the Project fence line. A nested Cartesian
grid was extended out from the fence line at the following receptor intervals and distances:
• At 25 -meter intervals along the Project Site fence line and out to 350 meters:
• At 50 -meter intervals from the 350 meters to 700 meters:
• At 100 -meter intervals from 700 meters to 1,400 meters:
• At 200 -meter intervals from 1.400 to 2,800 meters:
• At 400 -meter intervals from 2.800 to 5,600 meters; and
• At 800 -meter intervals from 5,600 to 11,200 meters.
In addition to the nested Cartesian grid. single receptors were added at 3 residential farm properties within 0.5 km
of Project site operations.
Receptor elevations were assigned by using USEPA's AERMAP software tool (version 11103: USEPA. 2011),
which is designed to extract elevations from USGS Digital Elevation Model (DEM) files and USGS National
Elevation Dataset (NED) files. AERMAP is the terrain preprocessor for AERMOD and uses the following procedure
to assign elevations to a receptor:
• For each receptor, the program searches through the USGS input files to determine the two profiles
(longitudes or eastings) that straddle this receptor.
• For each of these two profiles. the program then searches through the nodes in the USGS input files to
determine which two rows (latitudes or northings) straddle the receptor.
• The program then calculates the coordinates of these four points and reads the elevations for these four
points.
• A 2 -dimensional distance -weighted interpolation is used to determine the elevation at the receptor
location based on the elevations at the four nodes determined above.
NED data with a resolution of 1/3 arc -second (roughly 10 meters) were used as inputs to AERMAP. The NED data
domain was sufficient to properly account for terrain that would factor into the critical hill height calculations.
Receptor elevations generated by AERMAP were then visually confirmed with the actual USGS 7.5 -minute
topographic maps to ensure accurate representation of terrain features.
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5.8 AMBIENT BACKGROUND DATA
Monitoring data collected by the CDPHE Air Pollution Control District (APCD) and Wyoming Department of
Environmental Quality (WDEQ) were reviewed to determine representative monitoring site and ambient background
concentrations for the Project Site. Selection of monitoring sites considered proximity to the Project Site, and
comparison of the monitoring site environment to the environment surrounding the Project Site. In general, the
monitors located closest to the Project Site were selected for all pollutants. In addition, the location of each monitor
is in an area that is more industrialized than the Project Site and surrounding area, which makes the monitoring
data conservatively representative. The selected monitoring sites and representative ambient air quality
background concentrations are provided in Table 5-3.
Table 5-3. Ambient Background Air Quality Concentrations
Pollutant
Averaging
Period
Rank
Monitor
Location
Background
Concentration
(pg/m3)
NAAQS
(pg/m')
Ambient
Background
% of NAAQS
PM2 5
24 -hour
98th percentile
Ft. Collins
22
35
63%
Annual
Mean
Ft. Collins
6
12
50%
PMio
24 -hour
2"° high
Ft. Collins
50
150
33%
CO
1 -hour
2n° high
Ft Collins
5,153
40.000
13%
8 -hour
2n° high
Ft Collins
1,603
10,000
16%
NO2
1 -hour
98th percentile
Cheyenne
65
188
35%
Annual
Mean
Cheyenne
8
100
8%
SO2
1 -hour
2n° high
Cheyenne
23
196
11%
3 -hour
2n° high
Cheyenne
31
1,300
2%
24 -hour
2"° high
Cheyenne
8
365
2%
Annual
Mean
Cheyenne
1
80
1%
5.9 MODELING RESULTS
The modeling analyses were conducted using the most current version of AERMOD (Version 16216r) along with
the meteorological data as described in Section 5 4. The analyses were conducted to demonstrate compliance
with the NAAQS. All Project emissions sources were assumed to be operating simultaneously at maximum potential
emission rates to assess compliance with the NAAQS. The modeled results for the Project are summarized in
Table 5-4 for all pollutants modeled. Representative background concentrations were added to modeled impacts
and the total concentrations were then compared to the NAAQS. As shown in Table 5-4, emissions from the Project
will not cause or contribute to a violation of the NAAQS.
The air dispersion modeling analysis also revealed that the maximum modeled impacts were limited to near -field
areas. All modeled maximum concentrations for all pollutants occurred on or very near the Project boundary
Predicted concentrations at nearby residences and more than 100 meters beyond the Project boundary were well
below the NAAQS.
The modeling of fugitive dust emissions is known to over -predict ambient PM,o and PM2 r> concentrations. such that
the predictions presented here should be regarded as conservative overestimates of ambient air quality impacts
AERMOD does not account for the episodic (non -continuous) nature of fugitive dust emissions sources, does not
properly address near -source plume depletion, and does not consider the removal of dust in plumes by trees.
berms, and other obstacles. Cowherd (2009) identified deficiencies with model representation of fugitive dust
sources, and assigned factors of overestimation to the deficiencies:
TETRA TECH
5-6
Air Quality Evaluation
Severance Ready Mix & Asphalt
Table 5-4. Maximum AERMOD-Predicted Concentrations and NAAQS Compliance Assessment
Pollutant
Averaging
Period
Rank Basis
Predicted
Project
Concentration
(Ng/m3)
Ambient
Background
(Ng/m3)
Total
Concentration
(µg/m3)
NAAQS
(Ng/m3)
PM2 5
24 -hour
8H
(5-yeaHAverage)
11.5
22
33.5
35
Annual
1H
(5-yeaHAverage)
5.05
6
11.1
12
PMio
24 -Hour
6H
(5-yeaHDuration)
97.5
50
148
150
CO
1 -hour
H2H
858
5,153
6,010
40,000
8 -hour
H2H
544
1,603
2,150
10,000
NO2a
1 -hour
8H
(5-yeaHAverage)
121
65
186
188
Annual
H1H
5.53
8
13.5
100
SO2
1 -hour
4H
(5-yeaHAverage)
18.0
23
41.0
196
3 -hour
H2H
21.7
31
52.7
1,300
24 -hour
H2H
6.67
8
14.7
365
Annual
H1H
0.23
1
1.23
80
• Misrepresentation of haul roads as continuously emitting sources, factor of 2 overestimation;
• Cumulative effects of modeling deficiencies, factor of 4 overestimation for "average" groundcover;
• Exclusion of near -source agglomeration and enhanced deposition, up to a factor of 6 overestimation,
depending on wind and groundcover; and
• Exclusion of trapping by vertical obstacles during horizontal transport, factor of 2 to 6 overestimation,
depending on wind and groundcover;
Given these deficiencies, the worst -case ambient concentrations of PMio and PM25 resulting from the Project are
expected to be considerably less than those presented in Table 5-4.
lb
TETRA TECH
5-7
Air Quality Evaluation
Severance Ready Mix & Asphalt
6.0 REFERENCES
CDPHE 2011. Modeling Guideline for Air Quality Permits. Air Pollution Control Division / Technical Services
Program. May 20, 2011.
Cowherd 2009. Transportability Assessment of Haul Road Dust Emissions. Report Issued to USEPA. August
2009
NSSGA 2007. Modeling Fugitive Dust Sources with AERMOD Prepared for the National Stone, Sand & Gravel
Association by Trinity Consultants, January 2007
USEPA 1985. Guideline for the Determination of Good Engineering Practice Stack Height (Technical Support
Document for the Stack Height Regulation) — Revised_ EPA -450/4-80-023R. Office of Air Quality Planning and
Standards
USEPA 1988_ Control of Open Fugitive Dust Sources. EPA -450/3-88-008. Office of Air Quality Planning and
Standards. September 1988_
USEPA 2011. Compilation of Air Pollutant Emission Factors AP -42, Fifth Edition, Volume I: Stationary Point and
Area Sources. Office of Air Quality Planning and Standards. Various publication dates for each section.
USEPA 2016. User's Guide for the AMS/EPA Regulatory Model (AERMOD) and Addendums. EPA -454/B-16-011
(December 2016). Office of Air Quality Planning and Standards, Research Triangle Park, North Carolina.
USEPA 2017. Guideline on Air Quality Models (82 FR 5182). Codified in Appendix W to 40 CFR Part 51 Office
of Air Quality Planning and Standards, Research Triangle Park, NC. January 17, 2017.
WRAP 2006. WRAP Fugitive Dust Handbook. Prepared for the Western Governors Association by Countess
Environmental. September 7. 2006.
it
TETRA TECH
6-1
APPENDIX A: EMISSIONS CALCULATIONS
it
TETRA TECH
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY. COLORADO
SUMMARY OF EMISSIONS
Pollutant
CAS No.
PM
PM10
(tPY)
PM2.5
(tpy)
SO2
7446-09-5
(tPY)
NOx
(tPY)
CO
630-08-0
(tPY)
VOC
(tPY)
Lead
7439-92-1
(tpy)
HAP
(tpy)
Antimony
7440-36-0
(tPY)
Arsenic
7440-38-2
(tPY)
Benzene
71-43-2
(tPY)
Beryllium
7440-41-7
(tPY)
(tpy)
EMISSION SOURCES
CONCRETE BATCH PLANT (CBP)
0.25
0 12
0.02
---
---
---
---
0 00005
0.002
---
0.0002
---
0 000004
CBP WATER HEATER
0.05
0 05
0 05
0.004
0 89
0 52
0.07
0 000003
0 01
---
0.000001
0 00001
0 00000007
HOT MIX ASPHALT (HMA) DRUM MIXER
8.25
5.75
5.53
0 85
6 50
32.50
8 00
0 0002
1 35
0 00005
0.0001
0 10
--
HMA MATERIAL HANDLING
1 13
0 47
0.06
---
---
---
---
---
---
---
-
HMA SILO FILLING & TRUCK LOADOUT
0.01
0 01
0.01
---
0 34
0 09
---
0.002
---
---
0.00004
--
ASPHALT CEMENT STORAGE
---
---
---
---
0 003
0.03
---
0 00003
•--
---
0.00000007
---
ASPHALT CEMENT STORAGE HEATER
0.09
0 09
0.09
0.006
1 59
0 92
0.12
0.000005
0 02
0.000002
0.00002
0 0000001
RECYCLING & SCREENING
0.28
0.11
0.02
---
---
---
---
---
-
FUGITIVE SOURCES
STORAGE PILE WIND EROSION
0.07
0.04
0.01
---
HAUL ROADS
0-48
0 10
0.02
---
--
FRONT-END LOADER ACTIVITY
0.91
0 23
0 02
--
---
linir
-it
Facility Total
11.52
6.96
5.83
0.86
8.98
34.28
8.32
0.0002
1.38
0.00005
0.0003
0.10
0.000004
Major Source Threshold
250
250
250
250
250
250
250
5
25
10
10
10
10
Page 1 of 26 CactusHillEmissions-20180102 idsx, calcSummary
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
SUMMARY OF EMISSIONS
Pollutant
CAS No.
Bromomethane
74-83-9
(tPY)
Cadmium
7440-43-9
(tPY)
Carbon Disulfide
75-15-0
ftpy)
Chloroethane
75-00-3
(tpy)
Chloromethane
74-87-3
(tPY)
Chromium
7440-47-3
(tPY)
Cobalt
7440-48-4
(tPY)
Cumene
98-82-8
(tPY)
Dichlorobenzene
106-46-7
(tpy)
Ethylbenzene
100-41-4
(tpy)
EMISSION SOURCES
CONCRETE BATCH PLANT (CBP)
0 0000005
0 0002
---
CBP WATER HEATER
---
0 000007
---
0 000009
0 0000005
--
0 000007
HOT MIX ASPHALT (HMA) DRUM MIXER
---
0 0001
-
---
0 001
0 000007
---
0 06
HMA MATERIAL HANDLING
___
___
___
HMA SILO FILLING & TRUCK LOADOUT
0 000008
---
0 00001
0 00002
0 00002
---
---
0 00007
---
0 0002
ASPHALT CEMENT STORAGE
0 00000001
---
0.00000004
0 000000009
0 00000005
---
---
---
---
0 00000008
ASPHALT CEMENT STORAGE HEATER
---
0 00001
---
---
---
0 00002
0 0000009
---
0 00001
RECYCLING & SCREENING
---
--
___
___
FUGITIVE SOURCES
STORAGE PILE WIND EROSION
___
HAUL ROADS
FRONT-END LOADER ACTIVITY
Facility Total
0.000008
0.0001
0.00001
0.00002
0.00002
0.002
0.000008
0.00007
0.00002
0.06
Major Source Threshold
10
10
10
10
10
10
10
10
10
10
1/5/2018
Page 2 of 26 CactusHillEmissions-20180102 xlsx calcSummary
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY. COLORADO
SUMMARY OF EMISSIONS
Pollutant
CAS No.
Formaldehyde
50-00-0
(tPY)
n -Hexane
110-54-3
(tpy)
Isooctane
540-84-1
(tpy)
Manganese
7439-96-5
(tPY)
Mercury
7439-97-6
(tPY)
Methanol
67-56-1
(tpy)
Methyl Chloroform
71-55-6
(tPY)
Methylene Chloride
75-09-2
(tpy)
Naphthalene
91-20-3
(tPY)
Nickel
7440-02-0
(tPY)
Total PAH
---
(tPY)
EMISSION SOURCES
CONCRETE BATCH PLANT (CBP)
---
---
0 0009
---
-•
---
0 0002
--
CBP WATER HEATER
0 0005
0 01
---
0 000002
0 000002
---
0 000004
0 00001
0 0000005
HOT MIX ASPHALT (HMA) DRUM MIXER
0 78
0 23
0 01
0 002
0 0006
0 01
0 02
0 02
0 03
HMA MATERIAL HANDLING
---
---
---
---
---
---
__
__
HMA SILO FILLING & TRUCK LOADOUT
0 0003
0 0001
0 000001
---
---
0 0000009
0.00008
0 0003
ASPHALT CEMENT STORAGE
0 000002
0 0000002
0.0000000007
---
---
---
---
0 000000006
0 000004
---
0 00002
ASPHALT CEMENT STORAGE HEATER
0 0008
0 02
---
0 000004
0 000003
---
---
---
0 000007
0 00002
0 000001
RECYCLING & SCREENING
---
---
---
---
__
FUGITIVE SOURCES
STORAGE PILE WIND EROSION
HAUL ROADS
_
FRONT-END LOADER ACTIVITY
Facility Total
0.78
0.26
0.01
0.003
0.0006
0.00
0.01
0.0000009
0.02
0.02
0.03
Major Source Threshold
10
10
10
10
10
10
10
10
10
10
10
1/5/2018
Page 3 of 26 CactusHillEmissions-20180102 xtsx, calcSummary
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
SUMMARY OF EMISSIONS
Pollutant
CAS No.
Phenol
108-95-2
(tPY)
Phosphorous
7723-14-0
(tPY)
Selenium
7782-49-2
(tPY)
Styrene
100-42-5
(tPY)
Tetrachloroethene
127-18-4
(tPY)
Toluene
108-88-3
(tPY)
Trichlorofluoromethane
75-69-4
(tPY)
Xylenes
1330-20-7
(tpy)
EMISSION SOURCES
CONCRETE BATCH PLANT (CBP)
0 0005
0 00004
---
CBP WATER HEATER
--- _
0 0000001
---
0 00002
HOT MIX ASPHALT (HMA) DRUM MIXER
---
0 007
0 00009
---
0 04
0 05
HMA MATERIAL HANDLING
---
---
---
---
---
HMA SILO FILLING & TRUCK LOADOUT
0 00006
---
---
0 000006
0 000005
0 0001
0 0000008
0 00039
ASPHALT CEMENT STORAGE
---
---
---
0
00000001
---
0
0000001
---
0
0000006
ASPHALT CEMENT STORAGE HEATER
---
---
0 0000003
---
0 00004
-
---
RECYCLING & SCREENING
---
---
---
--
---
FUGITIVE SOURCES
STORAGE PILE WIND EROSION
---
---
HAULROADS
FRONT-END LOADER ACTIVITY
L
Facility Total
0.00006
0.008
0.0001
0.000006
0.000005
0.04
0.0000008
0.05
Major Source Threshold
10
10
10
10
10
10
10
10
1/5/2018
Page 4 of 26 CactusHillEmissions-20180102 xlsx calcSummary
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SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
CBP WATER HEATER (PROPANE PRIMARY FUEL)
SOURCE DESCRIPTION
The CBP water heater is a small unit fired with propane or natural gas and will be used to maintain sufficient temperature for
the asphalt cement to properly flow. The heater is conservatively assumed to operate at full capacity year-round.
OPERATING PARAMETERS
Heater
Operating Schedule
Fuels
Capacity
Propane HHV
Capacity
Sulfur Content
F -Factor
Exhaust Flow
Exit Temperature
Exit Diameter
Exit Velocity
EMISSION CALCULATIONS
8,760 hrs/yr
Propane
1.43 MMBtu/hr
91,500 Btu/gal AP42, Table 1.5-1
16 gal/hr
0.162 gr/scf Gas Processors Association Specification (185 ppmw as S)
10,200 scf/MMBtu from 40 CFR 60 Method 19
798 acfm
1,050 °F
0.5 ft
68 ft/s
Criteria Pollutant and GHG Emission Factors for Propane
Emission Factor
Pollutant lb/MMBtu lb/pal Source
PM10 0.00765 0.0007 AP42, Table 1.5-1
PM2.5 0.00765 0.0007 AP42, Table 1.5-1
SO2 0.00018 0.00002 AP42, Table 1.5-1
NOx 0.142 0.013 AP42, Table 1.5-1
CO 0.0820 0.0075 AP42, Table 1.5-1
VOC 0.0109 0.0010 AP42, Table 1.5-1
CO2 GWP 1 138.6 12.5000 AP42, Table 1.5-1
CH4 GWP 25 0.00220 0.0002 AP42, Table 1.5-1
N2O GWP 298 0.00984 0.0009 AP42, Table 1.5-1
Typical Emissions
Typical = Boiler Capacity (1.4 MMBtu/hr) x Emission Factor (lb/MMBtu)
PM10 = 1.4 MMBtu/hr * 0.00765 lbs/MMBtu
0.0109 lbs PM/hr
PM2.5 = 1.4 MMBtu/hr * 0.00765 lbs/MMBtu
0.0109 lbs PM/hr
SO2 = 1.4 MMBtu/hr * 0.000178 lbs/MMBtu
0.000254 lbs SO2/hr
NOx = 1.4 MMBtu/hr * 0.1421 lbs/MMBtu
0.203 lbs NOx/hr
CO = 1.4 MMBtu/hr * 0.0820 lbs/MMBtu
0.117 lbs CO/hr
VOC = 1.4 MMBtu/hr * 0.01093 lbs/MMBtu
0.01563 lbs VOC/hr
1/5/2018 Page 6 of 26 CactusHillEmissions-20180102.xlsx, CBP Water Heater (1)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
CBP WATER HEATER (PROPANE PRIMARY FUEL)
Pb = 1.4 MMBtu/hr * 0.000000000 lbs/MMBtu
0.000000000 lbs Pb/hr
CO2 = 1.43 MMBtu/hr " 138.6 lbs/MMBtu
198 lb CO2/hr
CH4 = 1.43 MMBtu/hr * 0.00220 lbs/MMBtu
0.00315 lb CH4/hr
N2O = 1.43 MMBtu/hr * 0.00984 lbs/MMBtu
0.01407 lb N2O/hr
CO2e (total) = (198 lb CO2/hr * 1 lb CO2e/lb CO2) + (0.00315 lb CH4/hr " 25 lb CO2e/lb CH4)
+ (0.01407 lb N2O/hr * 298 lb CO2e/lb N2O)
202 lb CO2e/hr
Annual Emissions
Annual = Average (lbs/hr) * 8,760 hrs/yr / 2,000 lbs/ton
PM10 = (0.0109 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0479 TPY Total PM10
PM2.5 = (0.0109 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0479 TPY Filterable PM2.5
SO2 = (0.000254 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00111 TPY SO2
NOx = (0.203 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.890 TPY NOx
CO = (0.117 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.513 TPY CO
VOC = (0.01563 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0685 TPY VOC
Pb = (0.000000000 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00000000 TPY Pb
CO2e = (202 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
887 TPY CO2e
1/5/2018 Page 7 of 26 CactusHillEmfissions-20180102.xlsx. CBP Water Heater (1)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
CBP WATER HEATER (PROPANE PRIMARY FUEL)
EMISSIONS SUMMARY
Pollutant
Typical
(lbs/hr)
Annual
(TPY)
PM10
I
0.0109
0.0479
PM2.5
0.0109
0.0479
SO2
0.000254
0.00111
NOx
0.203
0.890
CO
0.117
0.513
VOC
0.01563
0.0685
CO2e (total)
202
887
1/5/2018 Page 8 of 26 CactusHillEmissions-20180102 xlsx, CBP Water Heater (1)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
CBP WATER HEATER (NATURAL GAS BACKUP FUEL)
SOURCE DESCRIPTION
The CBP water heater is a small unit fired with propane or natural gas and will be used to maintain sufficient
temperature for the asphalt cement to properly flow. The heater is conservatively assumed to operate at full
capacity year-round.
OPERATING PARAMETERS
Heater
Operating Schedule
Fuels
Capacity
Natural Gas HHV
Capacity
Sulfur Content
F -Factor
Exhaust Flow
Exit Temperature
Exit Diameter
Exit Velocity
EMISSION CALCULATIONS
8,760 hrs/yr
Natural Gas
1.43 MMBtu/hr
1,020 Btu/scf
1,402 scf/hr
0.0020 gr/scf
10,610 scf/MMBtu
830 acfm
1,050 °F
0.5 ft
70 ft/s
Criteria Pollutant and GHG Emission Factors for Natural Gas
Pollutant
PM10
PM2.5
SO2
NOx
CO
VOC
Pb
CO2
CH4
N2O
Typical Emissions
GWP1
GWP 25
GWP 298
lb/MMBtu
0.00745
0.00745
0.00056
0.0980
0.0824
0.00539
0.000000490
117.6
0.00225
0.00216
AP42, Table 1.4-2
AP42, Table 1.4-2
from 40 CFR 60 Method 19
Emission Factor
Source
AP42, Table 1.4-2
AP42, Table 1.4-2
AP42, Table 1.4-2
AP42, Table 1.4-1
AP42, Table 1.4-1
AP42, Table 1.4-2
AP42, Table 1.4-2
AP42, Table 1.4-2
AP42, Table 1.4-2
AP42, Table 1.4-2
Typical = Boiler Capacity (1.4 MMBtu/hr) x Emission Factor (lb/MMBtu)
PM10 = 1 4 MMBtu/hr * 0.00745 lbs/MMBtu
0.0107 lbs PM/hr
PM2.5 = 1.4 MMBtu/hr * 0.00745 lbs/MMBtu
0.0107 lbs PM/hr
SO2 = 1.4 MMBtu/hr * 0.000560 lbs/MMBtu
0.000800 lbs SO2/hr
NOx = 1.4 MMBtu/hr * 0.0980 lbs/MMBtu
0.140 lbs NOx/hr
CO = 1.4 MMBtu/hr * 0.0824 lbs/MMBtu
0 118 lbs CO/hr
VOC = 1.4 MMBtu/hr * 0.00539 lbs/MMBtu
1/5/2018 Page 9 of 26 CactusHillEmissions-20180102.xlsx, CBP Water Heater (2)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
CBP WATER HEATER (NATURAL GAS BACKUP FUEL)
0.00771 lbs VOC/hr
Pb = 1.4 MMBtu/hr * 0.000000490 lbs/MMBtu
0.000000701 lbs Pb/hr
CO2 = 1.43 MMBtu/hr * 117.6 lbs/MMBtu
168 lb CO2/hr
CH4 = 1.43 MMBtu/hr * 0.00225 lbs/MMBtu
0.00322 lb CH4/hr
N2O = 1.43 MMBtu/hr * 0.00216 lbs/MMBtu
0.00308 lb N2O/hr
CO2e (total) = (168 lb CO2/hr * 1 lb CO2e/!b CO2) + (0.00322 lb CH4/hr * 25 lb CO2e//b CH4)
+ (0.00308 lb N2O/hr * 298 lb CO2e/lb N2O)
169 lb CO2e/hr
Annual Emissions
Annual = Average (lbs/hr) * 8,760 hrs/yr / 2,000 lbs/ton
PM10 = (0.0107 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0467 TPY Total PM10
PM2.5 = (0.0107 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0467 TPY Filterable PM2.5
SO2 = (0.000800 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00351 TPY SO2
NOx = (0.140 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.614 TPY NOx
CO = (0.118 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.516 TPY CO
VOC = (0.00771 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0338 TPY VOC
Pb = (0.000000701 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00000307 TPY Pb
CO2e = (169 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
741 TPY CO2e
1/5/2018 Page 10 of 26 CactusHillEmissions-20180102.xisx, CBP Water Heater (2)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
CBP WATER HEATER (NATURAL GAS BACKUP FUEL)
EMISSIONS SUMMARY
Pollutant
Typical
(lbs/hr)
Annual
(TPY)
PM10
0.0107
0.0467
PM2.5
0.0107
0.0467
SO2
0.000800
0.00351
NOx
0.140
0.614
CO
0.118
0.516
VOC
0.00771
0.0338
Pb
0.000000701
0.00000307
CO2e (total)
169
741
total HAP
0.00265
0.0116
TOTAL SPECIATED POLLUTANT EMISSIONS SUMMARY'
HAP
Organic HAP Speciation
n -hexane
formaldehyde
toluene
benzene
dichlorobenzene
naphthalene
PAH Speciation
total PAH
2-methylnaphthalene
phenanthrene
7,12-dimethylbenz(a)anthracene
pyrene
benzo(b,k)fluoranthene
fluoranthene
fluorene
anthracene
acenaphthene
acenaphthylene
benz(a)anthracene
chrysene
indeno(1,2,3-cd)pyrene
3-methylchloranthene
nthene
benzo(a)pyrene
benzo(g,h,i)perylene
dibenzo(a,h)anthracene
Inorganic HAP Speciation
nickel
chromium
cadmium
manganese
mercury
arsenic
cobalt
selenium
beryllium
Ib/MMscf lb/MMBtu
1.89E+00 1.85E-03
1.80E+00
7.50E-02
3.40E-03
2.10E-03
1.20E-03
6.10E-04
8.82E-05
2.40E-05
1.70E-05
1.60E-05
5.00E-06
3.60E-06
3.00E-06
2.80E-06
2.40E-06
1.80E-06
1.80E-06
1.80E-06
1.80E-06
1.80E-06
1.80E-06
1.20E-06
1.20E-06
1.20E-06
2.10E-03
1 40E-03
1.10E-03
3.80E-04
2.60E-04
2.00E-04
8.40E-05
2.40E-05
1.20E-05
1.76E-03
7.35E-05
3.33E-06
2.06E-06
1.18E-06
5.98E-07
8.65E-08
2.35E-08
1.67E-08
1.57E-08
4.90E-09
3.53E-09
2.94E-09
2.75E-09
2.35E-09
1.76E-09
1.76E-09
1.76E-09
1.76E-09
1.76E-09
1.76E-09
1.18E-09
1.18E-09
1.18E-09
2.06E-06
1.37E-06
1.08E-06
3.73E-07
2.55E-07
1.96E-07
8.24E-08
2.35E-08
1.18E-08
lb/hr
2.65E-03
2.52E-03
1.05E-04
4.77E-06
2.94E-06
1.68E-06
8.55E-07
1.24E-07
3.36E-08
2.38E-08
2.24E-08
7.01E-09
5.05E-09
4.21 E-09
3.93E-09
3.36E-09
2.52E-09
2.52E-09
2.52E-09
2.52E-09
2.52E-09
2.52E-09
1.68E-09
1.68E-09
1.68E-09
2.94E-06
1.96E-06
1.54E-06
5.33E-07
3.65E-07
2.80E-07
1.18E-07
3.36E-08
1.68E-08
lgy
1.16E-02
1.11E-02
4.61 E-04
2.09E-05
1.29E-05
7.37E-06
3.75E-06
5.42E-07
1.47E-07
1.04E-07
9.82E-08
3.07E-08
2.21 E-08
1.84E-08
1.72E-08
1.47E-08
1.11E-08
1.11E-08
1.11E-08
1.11E-08
1.11E-08
1.11E-08
7.37E-09
7.37E-09
7.37E-09
1.29E-05
8.60E-06
6.75E-06
2.33E-06
1.60E-06
1.23E-06
5.16E-07
1.47E-07
7.37E-08
REFERENCES/NOTES
1 Emission factors based on EPA AP -42, Section 1.4 "Natural Gas Combustion", July 1998.
1/5/2018 Page 11 of 26 CactusHillEmissions-20180102 xlsx, CBP Water Heater (2)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
HOT MIX ASPHALT PLANT DRUM MIXER
Hot Mix Asphalt Plant Operational Parameters
400 maximum capacity (ton/hr) (per Simon)
5,556 maximum capacity (toNday)
500.000 maximum capacity (toNyr) (per Simon)
counterflow drum mix plant
propane / natural gas fuel
Fabric Filter
Emission Factor
Amount Emitted
Pollutant
lb/ton
Ib/hr (max hour)
lb/hr (max day)
tpy
PM
PM10
PM2 5
CO
NO,
SO:
VOC
0.0330
1320
7.64
8 25
00230
920
532
575
0.0221
8 85
5 12
5 53
0.1300
52 00
30.09
32 50
0.0260
10 40
6 02
6 50
0.0034
136
0 79
0 85
00320
1280
741
800
Trace Hydrocarbons HAPs
Benzene
0 00039
0 16
0 09
0 10
Ethylbenzere
0 00024
0 10
006
006
Formaldehyde
0.0031
1 24
0 72
0.78
Hexane
0.00092
0 37
0 21
0 23
Isooctane
0 000040
0 02
0 01
0 01
Methyl Chloroform
0.000048
0 02
0 01
0 01
Naphthalene
0.000090
004
0 021
0.023
PAH (non -naphthalene)
0.00010
004
0 02
0.03
Toluene
0 00015
006
0.03
004
Xylene
0 00020
008
0 05
0 05
Trace Hydrocarbon HAPs _
2.11
1.22
1.32
Trace Metals HAPs
Antimony
0 00000018
0 00007
0 00004
0 00005
Arsenic
0 00000056
0 0002
0 0001
0 0001
Beryllium
000
000
000
000
Cadmium
0.00000041
0 0002
0.0001
0.0001
Chromium
0 0000055
0 002
0.001
0 001
Cobalt
0.000000026
0.000010
0 000006
0 000007
Hexavalent Chromium
0.00000045
0 0002
0.0001
0.0001
Lead (cntena pollutant)
0 00000062
0 0002
0 0001
0 0002
Manganese
0 0000077
0 003
0 002
0 002
Mercury
0 0000024
0 0010
0 0006
0 0006
Nickel
0 000063
0 03
0 01
0 02
Phosphorous
0 000028
0 01
0 01
0 01
Selenium
0 00000035
0 0001
0.0001
0 00009
Trace Metal HAPs
0.04
0.03
0.03
Total HAPs
2.15
1.25
1.36
Trace Hydrocarbons non-HAPs
Benzaldehyde
0 00013
0 05
0 03
0 03
Butyraldehydes
0 000030
0 01
0.007
0 008
Crotonaldehyde
0 000029
0 01
0 007
0 007
Hexanal
0.000024
0 01
0 006
0.006
Trace Metals non-HAPs
Barium
0 0000058
0.002
0.001
0 001
Copper
0 0000031
0 001
0 0007
0 0008
Silver
0 00000048
0 0002
0 0001
0.0001
Thallium
0 0000000041
0 000002
0 000001
0 000001
Zinc
0000061
002
001
002
PM and PM10 emission factors from AP -42 Table 11 1-3
PM2 5 emission factors based on 70% of filterable PM10 and 100% of condensable PM10
CO, NOx, SO2 emission factors from AP -42, Table 11 1-7
VOC emission factors from AP -42, Table 11 1-8
Trace hydrocarbon emissions from AP -42, Table 11 1-10
Trace metals emissions from AP -42. Table 11 1-12
1/5/2018
Page 12 of 26 CactusHillEmissions-20180102.xlsx, HMA Drum Mixer
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
HOT MIX ASPHALT PLANT MATERIAL HANDLING
Hot Mix Asphalt Plant Operations Parameter
400 maximum capacity itoNM) (par Srmonl
5.558 maximum capacity (toniday) (per Simon)
500 000 maximum capacity (torvyr) (per Simon)
courterftow drum mix plant
Composition of HMA Per AP -42
hr is
Material
Composition
Tons per hour
Tons per day
Tons peryew
Aggregate+RAP
93%
372
5.187
465,000
Aggregate
80%
298
4,133
37? 000
RAP
20%
74
1,033
93 000
Asphalt cement
6%
24
333
30 000
Lime
1%
4
56
5,000
Material
Activity
Type of activity
Capably
tonWlhr
Controlled Enassion Factors
Controlled Envisions
PM I
PM.r I
PM?,
PM
PM._
PM; ._
PM
PM.,
PM; 5
- r:
I am,
oM: .
lb/ ton
iomour i max hour;
ibibour (max Pa
)
1
Aggregate
Aggregate to storage pie
Batch drop'
297 6
0 00084
0 00040
0 000060
025
0 12
0 02
0 14
0 07
0 01
0 16
.: C:
0 011
2
Aggregate
Transfer to metering conveyor
Continuous drop operation '
297 6
0 00084
0 00040
0 000060
025
0 12
0 02
0 14
0 07
0 01
0 16
0 07
0 011
3
Aggregate
Metering conveyor to inclined conveyor
Conveyor TP '
297 6
0 00014
0 000046
0 000013
004
0 01
0 004
002
0 01
0 002
0 028
0 009
0 0024
4
Aggregate
Transfer to scalping screen
Continuous drop operation'
297 6
0 00084
0 00040
0 000060
0 25
0 12
002
0 14
0 07
0 01
0 16
0 07
0 011
5
Aggregate
Scalpng screen
Screen'
297 6
0 0022
0 00074
0 000050
0 85
0.22
0 01
038
0 13
0 01
0 41
0 14
0 009
6
Aggregate
Screen to conveyor
Conbnuous drop operation '
297 6
0 00084
0 00040
0 000060
0 25
0.12
002
0 14
0 07
0 01
0 18
0 07
0 011
7
Aggregate
Inclined conveyor to drum dryer
Conveyor TP'
297 8
0 00014
0 000046
0 000013
004
0 01
000
0 02
0 01
0 002
0 03
0 01
0 002
8
RAP
RAP to storage rile
Batch drop'
74 4
0 00084
0 00040
0 000060
006
003
0 004
004
002
0 CO3
0 039
0 018
0 0026
g
RN'
Transfer to RAP reed hopper
Batch drop'
74 4
0 00084
0 00040
0 000060
006
003
0 004
004
002
0 003
0 039
0 018
0 0028
10
Lime
Lime silo loading
Use cement silo loading factor'
4
0 00099
0 00034
0 000051
0 004
0 001
0 0O02
0 002
0 0008
0 0001
0 002
0 000'
0 0001
11
Lime
7 ranter to lime feed Hopper
Use cement weigh hopper factor '
4
0 0048
0 0028
0 00042
002
0 011
0 002
_ .
0 006
0 001
0 01
0 007
0 001
Total
180
0 75
.. 10
' --
0 43
0 O6
1 13
0 47
008
Notes
1 Balch Drop Operations and transfer operations to feed hopper, elevated bins and weigh hoppers
AP -42 13 2 4 3 Predictive Emission Factor Equation
Assumptions
V1hnd speed, U
Moisture, M
6 04
5
mileslhr
From AERMET met data for Kodak met tower site in VMdsoi
For controlled emissions
Controlled emissions
Ern:sa n tactor
Pollutant
k
U
M
0032((U15)^13N{(M2]"
'Mon of aggregate
PM
0 74
604
5
839E-04
PM._
036
604
5
397EO4
PM; .
0 053
804
5
8 01E 05
2 Emission factors from AP -42, Table 11 19.2 2
3 Screening emission factors from AP -42 Table 11 19.2 2
4 Lime emission factors taken from comparable cement emission factors in AP -42 Table 11 12-2, controlled with bin vent fitter
5 Lime emission lectors taken from comparable cement emission factors in AP -42 Table 11 12.2, with no control applied
1/5/2018
4)
Page 13 of 26 CactusHillEmissions-20180102 xlsx. HMA Matl Handling
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY. COLORADO
HOT MIX ASPHALT PLANT SILO FILLING AND TRUCK LOADOUT
Hot Mix Asphalt Plant Operational Parameters
400 maximum capacity (tonfir) (per Simon)
5,558 maximum capacity (toNday)
500,000 maximum capacity (ton/yr) (per Simon)
countertlow drum ma plant
Emission Factor
Emissions
Silo Filling
I Truck Loadout
Silo Filling
Truck Loadout
Silo Filling
I Truck Loadout
Silo Filling
Truck Loadout
Total Emissions
IMon
lbfir (max hour)
Ib/hr (max day)
tpy
INN
tPY
PM
000001
000004
0004
002
0002
001
0002
001
002
001
PM.;,
0 00001
0 00004
0 004
002
0 002
0 01
0 002
0 01
002
•
PMt s
0 00001
0 00004
0 004
002
0 002
0 01
0 002
0 01
002
- •
CO
0 00083
0 00072
0 25
029
0 15
0 17
016
0 18
0.54
NO,
-
-
-
-
SOs
-
-
-
VOC
0000'3
000025
l'.c
010
003
006
003
008
0.15
Organic PM HAPs
percent 0rgan:c PM
Naphthalene
1 82%
' 2
' i ! )1)OQ2
_ : -_
0 00001
0 00008
0 00001
0 00007
0 0001
0 00008
PAH (non -naphthalene)
9 58%
458%
000'
_ _ _ 4
0 00006
0 0002
0 00008
0 0003
0 0005
0.0003
Phenol
1 ' 8%
_ _ _
0 00006
0 00008
0 0001
0 00006
Total Organic PM HAPs
0 0001
0 0006
0 00007
0.0004
0.00008
0.0004
0.0007
0.0005
VOC HAPs
cerce^• sh0C
Benzene
0 032%
0 052%
0 00002
0 00005
0 00001
00 00003
0 00001
0 00003
0 00037
0 00004
Bromomethane
0 0049%
0 0090%
0 000003
0 000009
0 000001
0 000005
0 000002
0 000008
0 00001
0 000008
Carbon Disulfide
0.018%
0 013%
0 000008
0 00001
0 000005
0 000007
0.000005
0 000008
0 00002
0 00001
C hlorus0une
0 004%
0 00021%
0 000002
0 0000002
0 000001
0 0000001
0 000001
0 0000001
0 000002
0 000001
Chloromethane
0 023%
0 015%
0 00001
0 00001
0 000007
0 000009
0 000007
0 000009
0.00003
0 00002
C umine
0 11%
0.0001
0 00006
0 00007
0 0001
0 00007
Ethylbenzene
0.038%
0 28%
0 00002
0.0003
0 00001
0 0002
0 00001
0 0002
0 0003
0 0002
Formaldehyde
0 69%
0 088%
0 0004
0 00009
0 0002
0 00005
0 000.2
0 00005
0.0004
0 0003
n -Hexane
0 10%
015%
0 00005
0.0001
0 00003
0 00009
0 00003
0 00009
0 0002
0 0001
Isooctane
0 00031%
0 0018%
0 0000002
0 000002
0 0000001
0 000001
0 0000001
0 000001
0 000002
0 000001
Methylene ( •
0 0027%
0 000001
0 0000008
0 0000009
0 000001
0 0000009
MTBE
Styrer e
0 0054%
0 0073%
0 000003
0 000007
0 000002
0 000004
0 000002
0 000004
0 00001
0 000006
Tetrattnoroetne-e
00077%
0000006
0000004
0000005
0.000008
0000005
Tokiene
0 062%
0 21%
0 00003
0 0002
0 00002
0 0001
0 00.7..
0 OCO'
0 0002
0 0001
11 1-Tnch)oroethan.
Trchioreethene
T rich o.oruo•o^+rtnanit
00013%
0000001
00000007
0 0000008
0000001
0000001
x ytenes
0 26%
0 49%
0 0001
0 0005
O 0003
0 .00n0lt
0 0003
0 0006
0 0004
Total VOC HAPs
1-3%
1.5%
0.0007
0.001
0 0004
0.0009
0.0004
0.0009
0.002
0.001
T otal rrAPs
0.0008
0 002
0 0005
0.001
0.0005
0.001
0.003
0.002
Emission factors have been calculated by using equations provided in Table 11 1 14, AP -42
HAP emission fsctors taken from Tables 11 1 15 and 11 1 16, AP -42
Silo Filling Calculations (Table 11 1.14 AP -42(
T(A)
PM
Organic PM
TOC
CO
PM 10=PM
PM2 5=PM10
a V
Blue Smoke
Recovery Control
Efficiency (%)
EF (Ityton;
0 000009
0 000003
000013
0 00063
0 000009
0 000009
Plant Load Out Calculations (Table 11,1-14, AP.421
PM
Organic -!'
TOC
CO
PM1O PM
PM2 5=PMIO
760 -1354 -05
98 0%
Blue Smoke
Recovery Control
V ass i;-Urea Efficiency (%) EF (lb/ton)
-0 5 0 2582' 0 12910 88 2%
0 00004
0 00002
0 00026
0 00072
0 00004
0 00004
1/5/2018
Page 14 of 26 CactusHillEmissions-20180102.,dsx, HMA Silo Filling
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE
SOURCE DESCRIPTION
The facility includes 2 asphalt cement storage tanks of identical design vented to atmosphere Because of their identical
designs, emissions for only one of the tanks at full production throughput are calculated. These emissions are
representative of the combined emissions of both tanks Emissions are calculated using EPA's TANKS 4 09d software.
OPERATING PARAMETERS
Tank ID No
Tank
Tank Contents
Asphalt Cement
Tank Type
Vertical
Tank Diameter (ft)
12.0
Tank Length/Height (ft)
60
Tank Capacity (gal)
45,685
Throughput gal/yr)
6,980.137
Turnovers per Year
153
Max Liquid Height (ft)
54
Avg Liquid Height (ft)
48
Heated Tank
Yes
Average Product Temp (°F)
325
Maximum Product Temp (°F)
350
Minimum Product Temp (°F)
300
Underground Tank
No
Self -Supporting Roof
#N/A
Columns
#N/A
Effective Column Diameter
#N/A
Internal Shell Condition
#N/A
External Shell Color
White
External Shell Shade
White
External Shell Condition
Good
Roof Color
White
Roof Shade
White
Roof Paint Condition
Good
Fixed Roof Type
Cone
Roof Height (ft)
1 0000
Roof Slope (ft/ft)
0 1700
Breather Vent Vacuum (psig)
0
Breather Vent Pressure (psig)
0
Primary Seal
#N/A
Secondary Seal
#N/A
Deck Type
#N/A
Deck Fittings
#N/A
Vent Height above grade ( ft)
61
Vent Diameter (ft)
0.25
Exit Velocity ( ft/s )
10
Nearest Major City
Denver. CO
Daily Avg Temp (F)
50 21
Annual Avg Max Temp (F)
64 18
Annual Avg Min Temp F)
36 24
Avg Wind Speed (mph)
8.63
Annual Avg Insolation (Btu/ft2-day)
1,569
Atmospheric Pressure (psia)
12.122
Liquid Molecular Weight
1000 00
Vapor Molecular Weight
105 00
Liquid Density @ 60F (lb/gal)
8.60
Avg Bulk Temp (F)
325 00
Avg Annual Surface Temp (F)
325 00
1/5/2018
Page 15 of 26
CactusHdlEmissions-20180102 xlsx. Asphalt Storage
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE
Avg Annual Vapor Pressure (psia)
0 018
Avg July Surface Temp (F)
325 00
Avg July Vapor Pressure (psia)
0.018
VOC EMISSION CALCULATIONS'
Tank ID No.
Tank
EIQ No
Standing Loss (Ibs/yr)
25
Working Loss (Ibs/yr)
38
Rim Seal Loss (Ibs/yr)
Withdrawal Losses (Ibs/yr)
Deck Fitting Losses (Ibs/yr)
Deck Seam Losses (Ibs/yr)
Total Losses (tons/yr)
0 03
Emissions Summary
Pollutant
Average
(lbs./hr)
Annual
(TPY)
VOC
0 007
0 03
CO
0.0007
0 003
HAP
0.0009
0.00003
Organic PM HAPs
Naphthalene
percent Organic PM
1 82%
lb/hr
tpy
0.0001 0 000004
1/5/2018 Page 16 of 26 CactusHillEmissions-20180102 xlsx. Asphalt Storage
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE HEATER (PROPANE PRIMARY FUEL)
SOURCE DESCRIPTION
The asphalt cement storage heater is a small unit fired with propane or natural gas and will be used to maintain sufficient
temperature for the asphalt cement to properly flow. The heater is conservatively assumed to operate at full capacity year-
round.
OPERATING PARAMETERS
Heater
Operating Schedule
Fuels
Capacity
Propane HHV
Capacity
Sulfur Content
F -Factor
Exhaust Flow
Exit Temperature
Exit Diameter
Exit Velocity
EMISSION CALCULATIONS
8,760 hrs/yr
Propane
2.55 MMBtu/hr
91,500 Btu/gal AP42, Table 1.5-1
28 gal/hr
0.162 gr/scf Gas Processors Association Specification (185 ppmw as S)
10,200 scf/MMBtu from 40 CFR 60 Method 19
1,424 acfm
1,050 °F
0.5 ft
121 ft/s
Criteria Pollutant and GHG Emission Factors for Propane
Emission Factor
Pollutant lb/MMBtu lb/qal Source
PM10 0.00765 0.0007 AP42, Table 1.5-1
PM2.5 0.00765 0.0007 AP42, Table 1.5-1
SO2 0.00018 0.00002 AP42, Table 1.5-1
NOx 0.142 0.013 AP42, Table 1.5-1
CO 0.0820 0.0075 AP42, Table 1.5-1
VOC 0.0109 0.0010 AP42, Table 1.5-1
CO2 GWP 1 138.6 12,5000 AP42, Table 1.5-1
CH4 GWP 25 0.00220 0.0002 AP42, Table 1.5-1
N2O GWP 298 0.00984 0.0009 AP42, Table 1.5-1
Typical Emissions
Typical = Boiler Capacity (2.6 MMBtu/hr) x Emission Factor (lb/MMBtu)
PM10 = 2.6 MMBtu/hr * 0.00765 lbs/MMBtu
0.0195 lbs PM/hr
PM2.5 = 2.6 MMBtu/hr * 0.00765 lbs/MMBtu
0.0195 lbs PM/hr
SO2 = 2.6 MMBtu/hr * 0.000178 lbs/MMBtu
0.000453 lbs SO2/hr
NOx = 2.6 MMBtu/hr * 0.1421 lbs/MMBtu
0.362 lbs NOx/hr
CO = 2.6 MMBtu/hr * 0.0820 lbs/MMBtu
0.209 lbs CO/hr
VOC = 2.6 MMBtu/hr * 0.01093 lbs/MMBtu
0.02787 lbs VOC/hr
1/5/2018 Page 17 of 26 CactusHillEmissions-20180102.xlsx, Asphalt Heater (1)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE HEATER (PROPANE PRIMARY FUEL)
Pb = 2.6 MMBtu/hr * 0.000000000 lbs/MMBtu
0.000000000 lbs Pb/hr
CO2 = 2.55 MMBtu/hr * 138.6 lbs/MMBtu
353 lb CO2/hr
CH4 = 2.55 MMBtu/hr * 0.00220 lbs/MMBtu
0.00562 lb CH4/hr
N2O = 2.55 MMBtu/hr * 0.00984 lbs/MMBtu
0.02508 lb N2O/hr
CO2e (total) = (353 lb CO2/hr * 1 lb CO2e/lb CO2) + (0.00562 lb CH4/hr * 25 lb CO2e/lb CH4)
+ (0.02508 lb N2O/hr * 298 lb CO2e/lb N2O)
361 lb CO2e/hr
Annual Emissions
Annual = Average (lbs/hr) * 8,760 hrs/yr/ 2,000 lbs/ton
PM10 = (0.0195 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0854 TPY Total PM10
PM2.5 = (0.0195 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0854 TPY Filterable PM2.5
SO2 = (0.000453 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00198 TPY SO2
NOx = (0.362 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
1.587 TPY NOx
CO = (0.209 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.915 TPY CO
VOC = (0.02787 lbs/hr) * (8,760 hrs/yr) 1(2,000 lbs/ton)
0.1221 TPY VOC
Pb = (0.000000000 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00000000 TPY Pb
CO2e = (361 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
1,581 TPY CO2e
1/5/2018 Page 18 of 26 CactusHillEmissions-20180102.xlsx, Asphalt Heater (1)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE HEATER (PROPANE PRIMARY FUEL)
EMISSIONS SUMMARY
Pollutant
Typical
(lbs/hr)
Annual
(TPY)
PM 10
0.0195
0.0854
PM2 5
0.0195
0.0854
SO2
0 000453
0 00198
NOx
0 362
1 587
CO
0.209
0.915
VOC
0 02787
0.1221
CO2e (total)
361
1,581
1/5/2018
Page 19 of 26 CactusHillEmissions-20180102 xlsx Asphalt Heater (1)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE HEATER (NATURAL GAS BACKUP FUEL)
SOURCE DESCRIPTION
The asphalt cement storage heater is a small unit fired with propane or natural gas and will be used to maintain
sufficient temperature for the asphalt cement to properly flow conservatively operate at
full capacity year-round.
OPERATING PARAMETERS
Heater
Operating Schedule
Fuels
Capacity
Natural Gas HHV
Capacity
Sulfur Content
F -Factor
Exhaust Flow
Exit Temperature
Exit Diameter
Exit Velocity
EMISSION CALCULATIONS
8,760 hrs/yr
Natural Gas
2.55 MMBtu/hr
1,020 Btu/scf
2,500 scf/hr
0 0020 gr/scf
10,610 scf/MMBtu
1,481 acfm
1,050 °F
0.5 ft
126 ft/s
Criteria Pollutant and GHG Emission Factors for Natural Gas
Pollutant
PM10
PM2.5
SO2
NOx
CO
VOC
Pb
CO2
CH4
N2O
Typical Emissions
GWP1
GWP 25
GWP 298
The heater is assumed to
lb/MMBtu
0 00745
0 00745
0 00056
0 0980
0 0824
0.00539
0 000000490
117 6
0.00225
0 00216
AP42 Table 1 4-2
AP42, Table 1 4-2
from 40 CFR 60 Method 19
Emission Factor
Source
AP42 Table 1 4-2
AP42, Table 1 4-2
AP42, Table 1.4-2
AP42, Table 1.4-1
AP42, Table 1.4-1
AP42, Table 1.4-2
AP42, Table 1.4-2
AP42. Table 1.4-2
AP42, Table 1 4-2
AP42. Table 1 4-2
Typical = Boiler Capacity (2.6 MMBtu/hr) x Emission Factor (Ib/MMBtu)
PM10 =
PM2.5 =
2.6 MMBtu/hr * 0 00745 lbs/MMBtu
0 0190 lbs PM/hr
2 6 MMBtu/hr * 0.00745 lbs/MMBtu
0.0190 lbs PM/hr
SO2 = 2 6 MMBtu/hr * 0.000560 lbs/MMBtu
0 001427 lbs SO2/hr
NOx = 2.6 MMBtu/hr * 0.0980 lbs/MMBtu
0.250 lbs NOx/hr
CO = 2.6 MMBtu/hr ' 0.0824 lbs/MMBtu
0 210 lbs CO/hr
VOC = 2 6 MMBtu/hr * 0 00539 lbs/MMBtu
1/5/2018 Page 20 of 26 CactusHillEmissions-20180102 xlsx Asphalt Heater (2)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE HEATER (NATURAL GAS BACKUP FUEL)
0.01375 lbs VOC/hr
Pb = 2.6 MMBtu/hr * 0.000000490 lbs/MMBtu
0.000001250 lbs Pb/hr
CO2 = 2.55 MMBtu/hr * 117.6 lbs/MMBtu
300 lb CO2/hr
CH4 = 2.55 MMBtu/hr * 0.00225 lbs/MMBtu
0.00575 lb CH4/hr
N2O = 2.55 MMBtu/hr * 0.00216 lbs/MMBtu
0.00550 lb N2O/hr
CO2e (total) = (300 lb CO2/hr * 1 lb CO2e/lb CO2) + (0.00575 lb CH4/hr * 25 lb CO2e//b CH4)
+ (0.00550 lb N2O/hr * 298 lb CO2e/lb N2O)
302 lb CO2e/hr
Annual Emissions
Annual = Average (lbs/hr) * 8,760 hrs/yr / 2,000 lbs/ton
PM10 = (0.0190 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0832 TPY Total PM10
PM2.5 = (0.0190 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0832 TPY Filterable PM2.5
SO2 = (0.001427 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00625 TPY SO2
NOx = (0.250 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
1.095 TPY NOx
CO = (0.210 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.920 TPY CO
VOC = (0.01375 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.0602 TPY VOC
Pb = (0 000001250 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
0.00000548 TPY Pb
CO2e = (302 lbs/hr) * (8,760 hrs/yr) / (2,000 lbs/ton)
1,322 TPY CO2e
1/5/2018 Page 21 of 26 CactusHillEmissions-20180102.xlsx, Asphalt Heater (2)
HAP
Organic HAP Speciation
n -hexane
formaldehyde
toluene
benzene
dichlorobenzene
naphthalene
PAH Speciation
total PAH
2-methylnaphthalene
phenanthrene
7,12-dimethylbenz(a)anthracene
pyrene
benzo(b,k)fluoranthene
fluoranthene
fluorene
anthracene
acenaphthene
acenaphthylene
benz(a)anthracene
chrysene
indeno(1,2,3-cd)pyrene
3-methylchloranthene
benzo(a)pyrene
benzo(g,h,i)perylene
dibenzo(a,h)anthracene
)anthracene
Inorganic HAP Speciation
nickel
chromium
cadmium
manganese
mercury
arsenic
cobalt
selenium
beryllium
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
ASPHALT CEMENT STORAGE HEATER (NATURAL GAS BACKUP FUEL)
EMISSIONS SUMMARY
Pollutant
Typical
(lbs/hr)
Annual
(TPY)
P M 10
0.0190
0.0832
PM2.5
0.0190
0.0832
SO2
0.001427
0.00625
NOx
0.250
1.095
CO
0.210
0.920
VOC
0.01375
0.0602
Pb
0 000001250
0.00000548
CO2e (total)
302
1,322
total HAP
0.00472
0.0207
TOTAL SPECIATED POLLUTANT EMISSIONS SUMMARY'
Ib/MMscf lb/MMBtu
1.89E+00 1.85E-03
1.80E+00
7.50E-02
3.40E-03
2.10E-03
1.20E-03
6.10E-04
8.82E-05
2.40E-05
1.70E-05
1.60E-05
5.00E-06
3.60E-06
3.00E-06
2.80E-06
2.40E-06
1.80E-06
1.80E-06
1.80E-06
1.80E-06
1.80E-06
1.80E-06
1.20E-06
1.20E-06
1 20E-06
2.10E-03
1 40E-03
1.10E-03
3.80E-04
2.60E-04
2.00E-04
8.40E-05
2.40E-05
1.20E-05
1.76E-03
7.35E-05
3.33E-06
2.06E-06
1.18E-06
5.98E-07
8.65E-08
2.35E-08
1.67E-08
1.57E-08
4.90E-09
3.53E-09
2.94E-09
2.75E-09
2.35E-09
1.76E-09
1.76E-09
1.76E-09
1.76E-09
1.76E-09
1.76E-09
1.18E-09
1.18E-09
1.18E-09
2.06E-06
1.37E-06
1.08E-06
3.73E-07
2.55E-07
1.96E-07
8.24E-08
2.35E-08
1.18E-08
lb/hr
4.72E-03
4.50E-03
1.88E-04
8.50E-06
5.25E-06
3.00E-06
1.53E-06
2.21E-07
6.00E-08
4.25E-08
4.00E-08
1.25E-08
9.00E-09
7.50E-09
7.00E-09
6.00E-09
4.50E-09
4.50E-09
4.50E-09
4 50E-09
4.50E-09
4.50E-09
3.00E-09
3.00E-09
3.00E-09
5.25E-06
3.50E-06
2.75E-06
9.50E-07
6.50E-07
5.00E-07
2.10E-07
6.00E-08
3.00E-08
2.07E-02
1.97E-02
8.21 E-04
3.72E-05
2.30E-05
1.31 E-05
6.68E-06
9.66E-07
2.63E-07
1.86E-07
1.75E-07
5.48E-08
3.94E-08
3.29E-08
3.07E-08
2.63E-08
1.97E-08
1.97E-08
1.97E-08
1.97E-08
1.97E-08
1.97E-08
1.31E-08
1.31 E-08
1.31 E-08
2.30E-05
1.53E-05
1.20E-05
4.16E-06
2.85E-06
2.19E-06
9.20E-07
2.63E-07
1.31E-07
REFERENCES/NOTES
1 Emission factors based on EPA AP -42, Section 1.4 "Natural Gas Combustion ", July 1998.
1/5/2018 Page 22 of 26 CactusHillEmissions-20180102.xlsx, Asphalt Heater (2)
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
RECYCLING AND SCREENING OPERATIONS
Recycling 8 Screening Operational Parameters
150 maximum capacity (ton/hr) (per Simon)
24 maximum operating hours per day (per Simon)
3,600 maximum capacity (ton/day)
100,000 maximum capacity (ton/yr) (per Simon)
Reference
Item
Matenal
Activity
Capacity
Emission Factors - Controlled
Controlled Emissions
Name
Type
Number
(ton/hr)
lb/ton
lb/hr
tpy
PM
PM,0
PM2 5
PM
PM10
PM2 5
PM
PM,0
PMz 5
1
RAP
Feed Storage Pile
Drop'
1
150
0 00084
0 00040
0 000060
0 13
0.06
0.01
0.04
0.02
0 003
2
RAP
Recycler
Crush2
1
150
0.0012
0 00054
0 00010
0 18
0.08
0 02
0.06
0.03
0.005
3
RAP
Storage Pile
Drop'
I
150
0 00084
0.00040
0 000060
0 13
006
0.01
0 04
0 02
0 003
4
RAP
Screen
Screen3
1
150
0.0022
0 00074
0 000050
0.33
0.11
0.008
0 11
0 04
0 003
5
RAP
Stackers
Transfer4
4
150
0 00014
0 000046
0 000013
0.08
0.03
0.008
0.03
0.009
0 003
TOTAL
0 85
0.34
0 05
028
0 11
0 02
Note 1
Batch drop operations and transfer operations to feed hopper
AP -42, 13.2.4 3 Predictive Emission Factor Equation
Assumptions
Wind speed, U
Moisture, M
6 04 miles/hr From AERMET met data for Kodak met tower site in Windsor
5
0/0
For controlled emissions
Controlled emissions
Emission factor
Pollutant
k
U
M
k'0 0032((U/5)^1 3)/((M/2)^1 4)
lb/ton of aggregate
PM
0.74
6-04
5
8-39E-04
PM15
0 48
6.04
5
544E-04
PM10
0.35
6.04
5
3.97E-04
PM5
0.2
6.04
5
2.27E-04
PM2 5
0.053
604
5
6 01E-05
Note 2 Recycler emission factors assumed equal to controlled tertiary crushing emission factors. AP -42 Section 11 19.2, Table 11 19-2-2
Note 3. Screen emission factors assumed equal to controlled screening emission factors, AP -42 Section 11.19.2, Table 11 19.2-2.
Note 4 Conveyor transfer emission factors assumed equal to controlled conveyor transfer point emission factors. AP -42 Section 11 19.2, Table 11 19.2-2.
1/5/2018
Page 23 of 26 CactusHillEmissions-20180102.xlsx, Recycling -Screening
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
WIND EROSION OF STORAGE PILE SURFACES
Storage Pile Parameters
20 Storage pile diameter meters
3 05 Storage pile height, meters
95.8 Storage pile surface area, m2
10 Storage piles
4.8 Silt content of aggregate (s)
54 No of days with 0 01 inch of precipitation per year (p) per Fort Collins precipitation data, 1981-2010, obtained from the National Climatic Data Center
11 4 % of time unobstructed wind speed exceeds 12 mph (f) from AERMET met data for Kodak met tower site in Windsor
70 0% control efficiency
Emission factor equation for total PM
PM 1 7'(s/1 5)1(365-p)/235)]'(f/15) Reference Control of Open Fugitive Dust Sources, EPA -450/3-88-008. September 1988 Page 4-17
PM emission factor
Controlled PM emission Factor
5 4951 lb/day-acre
1 6485 lb/day-acre
Single Pile
All Piles
PM
PM10 (50% of PM)
PM2 5 (15% of PM10)
Emission
Factor
(lb/hr-acre)
0 06869
0 03434
0 00515
Emission
Rate
(Ib/hr)
0 0016253
0.0008127
0 0001219
Emission
Rate
(tPY)
0 00712
0 00356
0 00053
Emission
Rate
(lb/hr)
0 01625
0 00813
0 00122
Emission
Rate
(tPY)
0.07119
0 03559
0 00534
For AERMOD inputs, TCEQ has recommended applying a scalar on the wind speed categories that is a function of the site average wind speed (WScat/WSavg)^1 3
AERMOD
Scalar
site average wind speed
2 70 m/s
AERMOD wind speed category 1
1 54 m/s
0 482
AERMOD wind speed category 2
3 09 m/s
1 000
AERMOD wind speed category 3
5 14 m/s
1 000
AERMOD wind speed category 4
8 23 m/s
1 000
AERMOD wind speed category 5
10 8 m/s
1 000
1/5/2018
Page 24 of 26 CactusHillEmissions-20180102.xlsx. Storage Piles
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY. COLORADO
PAVED HAUL ROADS
Paved Haul Road Pra.rlaen
SAWS lel)
Na o1 Wet Deye per Yea (PI
Cavan" Drys pr Yea
Como, Errancy
Particle Sae tMpr at PM
Prtps Sin Mater lk) P4415
Prtce Sae tAV4per 0r) PM10
Pena Be. Mulcts lk). PM2 5
12 ym2
544.0011
396
975%
0011
0 0027
0 0002
0 03054
pa AP -42 'abs 13 2 1.3 Concrete Raney
Sr Fat Cobs pecptsaen data 196/1010 weaved Mornay Katonal Greta Ora Coen
pa MAP Ethane DS Hweook
Truck Calculations
Sand 6 Nat a Delivery
RAP Davery
Lae Delivery
Asphalt Comm Dekvery
HAS Haul -Out
:anon 6 Supplement Debven
Concrete Haul -QA
Truck FW Wyly
tore
26
tank
54
tons
e3
tons
43
lons
54
tone
35ytons
15
tons
Truck Empty Weer
1
tore
II
In
I6
tons
15
Ions
15
lons
16
tors
Truck tag Capacity
7
torvload
15
torvbad
36
tonCe0
76
toned
26
tonbd
36
tenloed
20
toned
Maws' Pmocwesla Rae
594
tan's,
150
twiny,
4
tone w
74
irMour
403\ta
nine
51
tonh4lr
367
tar11O,
MeinProcyon' Rae
9.677
rytay
3 600iondsy
56
toIoniandmy
333
Ionian
5.556
tondos
a40/bnduy
6,707
tonday
Manuel Procyon" Rae
536.
100000
lonyse,
5.000
Owner
30.0007tanysar
500,000Hon
sr
26200
taws
201.200
towns
Tnce Ira
I
trpalrw
6
turps. to.
1
tryanlot
1
trpeAt,
1
trpane,
IarpsTps
/6
np.7n,
Truce Tra
lraaey
emperors
2
bmprdey
I2/brd
pey
250rtr
a *IV
5\vpwaay
335
up.. day
1. RCS Tapa
19 166
year
60671rpsywr
139
trpa.yeer
1 071
trs.sr
17857
troops
7811r9s7sr
10.060ropryar
Typcel Try Leman Tour
1 749
warp
1 6497$eetbp
5461eetMp
546
tes tit
546
taat wit
1749pean
p
1.74944wynp
Typos Try Lengtil Loaded
791
tsewfip
67yNeppy
443
feetup
190
teeV5lp
333
IMtt p
1 2961eedtrp
453
feetbp
Typal Top Lrgtr, urinated
wtrop
82yes
ftp
103
henry
356
toot/7q
213
feottnp
453
teeny
1 296
J.Mltp
lbwty VMT Total
3
non
2
maw
0
rash
0
nMm
7
min,
0
n'N
laws
Davy WI. fete
25
rrWLy
12
!marry
0
meaty
I
rnuoay
26
mwdey
7
naday
Ill
noel
Amon WI TOtai
6.346
nay,
2 062
rnyr
14
reN
Ill
;My
1.847
min
259
maw]+
J,]Ji
naym
Annual VW Loaded
2 870
miry,
1041
nays
12
mar
39
my
1.125
nap
192
milt
863
mwyr
Annual VFAT unloaded
3.477
nay,
1041
min
3
nwy,
72
my
721
nwyt
61
nwyr
2.4612
rnrya
Routs
CBPAaaregee Howlo
RAP Dokvery Route
HMA Route
HMA Route
PIMA Route
CBP/Aaangete Route
CBP/ m Ara aaala Route
Route Calculations
CHPtAw epte Row
HMA Route
RAP Dalnry Route
Trues Topa
79
upshots
17
trpa,ots
6
trpamow
Truck Tnpk
4151rparlay
184
vpaday
40
Irq✓day
Tract Trpa
30009
trpayear
19067
trpayssr
6667
oyster
Tic Igniter,
1.749
teattrp
546
•w.ro,p
1 649
teottrp
flarmy MUT Total
10
meow
2
misty
2
maw
Day VMT TOW
I36
nosy
27
nary
12
may
Annual WIT total
9936
nryr
1 972
mryr
2 082
imp
Average Truce Weed Oyer Route
256
tons
31 8
ions
165
Ire
WW1 Term known Factor PM
0 0721
bVMT
00396
toner
00517
SWA4T
Snort Term Ernann Factor PM15
00177
bwMT
00270
bIVMT
00127
bIVT
ShanTwinEnnmen Factor PM10
00144
b'VMT
00180
b'11110
00103
ONO
Ssn- Term Ermaon Factor PM2 5
00035
bVMT
00044
b7VAIT
00025
bvMT
Annual [minion Factor PM
00694
bVUT
00665
b1VMT
00496
SWOT
Annual Eastern Fagot PM 15
00170
bVMT
0.0212
bVMT
00172
SWOT
Annual Emission Factor PM10
0 0139
bIVMT
00173
%MAT
0 0100
%NMT
Annual Eneson Fedor PM75
00034
bVMT
00042
SMUT
00024
IDA/MT
PM Erratum Rae Ma. How
0 6947
bN
0 15791+btv
0 0970
bN
PM10 Er, aeon Ras Me. Ho,
0 1389
b'N
0 03IS
bAw
0 0194
bra
PM2 5 Unison Rae Mr Ho,
3 0341
bma
0 0375/estti
0 1021
Sir
0 03481b'nr
0 0269
A'N
PM Emsson Rte Mak Day
0 4130
bin
PM10 Enason Rae Ma. Owl
00626
blo
00704
Iona
00054
ton(
PM2 5 Eneeon Rae, Max On
0 0203
btr
0 0050 btu
0 0013
tear
PM Erasion Rua Annual
0 3449
tpy
0 0653 tpy
0 0519
tpy
PO10 Enron Rae. Anna,
0 0690
,pt
0 0171 Ipy
0 0104
tpy
Pan 5 Eamon Rua. Arno.
0 0199
Ipy
0 0047 tin
0 0025
Ica
Ma AP -42 Sector, 1321. Ealaton2
Emissions Tours
PM
Pall
PM75
My Hour (IWN)
0 9496
0 1899
0 0466
Mal DRY lbN)
0 5421
0 1084
0 0208
Annual (Cy)
0 4620
0 0964
0 0237
1/5!2018
Page 25 of 26 Cac taHdlErnrssion6-20180102 xSx. Hata Roads
SEVERANCE READY -MIX AND ASPHALT
WELD COUNTY, COLORADO
FRONT-END LOADER MOVEMENT ON UNPAVED SURFACES
Unpaved Surfaces Parameters
Loader Full Weight
Loader Empty Weight
Loader Haul Capacity
Loader Average Weight
s, silt content
Control Efficiency
No. of Wet Days per Year (P)
22.5 tons
17.5 tons
5 ton/load
20.0 tons
4.8 %
97.5 %
54 (> 0.01 ")
per AP -42, Table 13.2.2-1, sand and gravel processing
per Fort Collins precipitation data, 1981-2010, obtained from the National Climatic Data Center
Loader Calculations
Throughput
Trips
Round
Trip
(feet)
VMT
Max Hour
(tph)
Max Day
(tph)
Annual
(tpy)
Max Hour
(per hour)
Max Day
(per hour)
Annual
(per year)
Max Hour
(mi/hr)
Max Day
(mi/hr)
Annual
(mi/yr)
RAP Crusher Feed
150
150
100,000
30
30
20,000
400
2.27
2.27
1,515
RAP Screen Feed
150
150
100,000
30
30
20,000
400
2.27
2.27
1,515
RAP Storage
150
150
100,000
30
30
20,000
400
2.27
2 27
1,515
HMA Aggregate Feed
298
172
372.000
60
34
74.400
400
4.51
2.61
5.636
HMA RAP Feed
74
43
93,000
15
9
18,600
400
1 13
0.65
1,409
CBP Sand & Aggregate Feed
296
229
164,650
59
46
32.930
400
4.49
3.46
2.495
Total
1,118
894
929,650
224
179
185,930
400
16.95
13.54
14,086
Emissions Calculations
Short -Term
Emission Factor
IbNMT
Annual
Emission Factor
IbNMT
Emission Rate
Max Hour
(lb/hr)
Max Day
(lb/hr)
Annual
(ton/yr)
k
a
b
PM
4.9
0.7
0.45
0.1515
0.1291
2.57
2.05
0.91
PM"
1 5
0.9
0.45
0.0386
0 0329
0.65
0 52
0.23
PM2.5
0.15
0.9
0.45
0.0039
0.0033
0.07
0.05
0.02
Max Day Emission Rates (lb/hr)
RAP
Crusher
Feed
RAP
Screen
Feed
RAP
Storage
HMA
Aggregate
Feed
HMA
RAP
Feed
CBP
Aggregate
Feed
PM10
0.0877
0.0877
0.0877
01007
0.0252
0.1338
PM2.5
0.00877
0.00877
0.00877
0.01007
0.00252
0.01338
1/5/2018
Page 26 of 26 CactusHillEmissions-20180102.xtsx, Loader Movement
AERMOD POINT Sources
Source ID
CBPBLDG
CBPWTHTR
CBPSILO1
CBPSILO2
CBPSILO3
HMASILOL
HMABGHSE
HMAACTKI
HMAACTK2
HMAGSHTR
HMASILO1
HMASILO2
HMASILO3
X Coord. [m]
507857 16
507857 19
507849.40
507848 42
507849 37
507958 72
507984 23
508007 83
508007 94
508009 76
507996.18
508000.75
508005.36
Y Coord. [m]
4491456 86
4491454 53
4491460 20
4491455 85
4491451 05
4491448 27
4491459 07
4491465 49
4491459 69
4491482 65
4491476 18
4491477 24
4491476 20
Base
Elevation
(m]
1554 14
1554 07
1554 11
1553 88
1553 76
1553 86
1554 14
1554 22
1553 96
1554 06
1554 72
1554 75
1554 71
Release
Height
[m]
15.24
15 24
18 29
18 29
18 29
18 29
18 29
18 29
1829
4 57
18.29
1829
18 29
PM10
Emission
Rate
[lb/hr]
1 40E-01
1 09E-02
5 56E-05
5 56E-05
5 56E-05
7 67E-04
5 32E+00
1 95E-02
7.22E-04
7 22E-04
7 22E-04
PM10
Emission
Rate [gls]
1 76E-02
1.38E-03
7 00E-06
7.00E-06
7 00E-06
9.92E-05
8 71E-01
2 48E-03
9 09E-05
9.09E-05
9 09E-05
PM2.5
Emission
Rate
[lb/hr]
2 10E-02
1 09E-02
8 33E-06
8 33E-06
8 33E-06
1 18E-04
5 12E+00
1 95E-02
7 22E-04
7 22E-04
7 22E-04
PM2.5
Emission
Rate [g/s]
2.64E-03
1 38E-03 1 18E-01 1 48E-02
1 05E-06
1 05E-06
1 05E-06
1 49E-05
6 45E-01 5 20E+01 6 55E+00
this is a VOGHAP source
this is a VOC/HAP source
2 46E-03 2 10E-01 2 65E-02
9 09E-05 8 40E-02 1 06E-02
9.09E-05 8 40E-02 1 06E-02
9.09E-05 8 40E-02 1 06E-02
CO
Emission
Rate
[lb/hr]
CO
Emission
Rate [g/s]
NOx
Emission
Rate
[lb/hr]
NOx
Emission
Rate [g/s]
SO2
Emission
Rate
[lb/hr]
SO2
Emission
Rate [Ws]
Gas Exit
Temperat
um [K]
Gas Exit
Velocity
[m/s]
Inside
Diameter
[m]
Description
-0 3 048 1 57 CBP Exhaust from main building
2.03E-01 2.56E-02 8 00E-04 1 01E-04 350.0 3 048 0 30 CBP Water heater exhaust from main building
-0 3.048 1.22 COP Silo vent 1
-0 3 048 1 22 CBP Silo vent 2
-0 3 048 1 22 CBP Silo vent 3
-0 3 048 1 22 HMA Lime silo
1 04E+01 1 31E+00 1 38E+00 1 71E-01 403.2 1556 1 57 HMA Baghouse
310.9 3 048 1 22 HMA Asphalt cement silo 1
310 9 3 048 1 22 HMA Asphalt cement silo 2
3 62E-01 4.56E-02 1 43E-03 1 80E-04 350.0 3 048 0 30 HMA Gas heater exhaust
403 2 3.048 1 22 HMA Sib 1
403.2 3 048 1 22 HMA Silo 2
403.2 3.048 1 22 HMA Silo 3
1/5/2018
Page 1 of 1 CactusHillEmissions-20180102.xlsx, Point
AERMOD VOLUME Sources
Source ID
X Coord.
[m]
Y Coord.
(m]
Base
Elevation
(m]
Release
Height
[m)
PM10
Emission
Rate [lb/hr]
PM10
Emission
Rate [gilt]
PM2.5
Emission
Rate
[lb/hr)
PM2.5
Emission
Ratejgls
CO
Emission
Rate
[1b/hr]
CO
Emission
Rate (gls)
NOx
Emission
Rate
[lb/hri
SO2
Emission
Rate
[lb/hr)
Side
Length
[m]
Building
Height
[m]
Initial
Lateral
Dimensio
n [m)
initial
Vertical
Dimensio
n [m]
Description
CBPHOPRI
507890.17
4491454.80
1554.06
3.05
3 03E-02
3 81E-03
4 58E-03
5.77E-04
4 11
6.10
096
2.84
CBP Loading to hopper 1
CBPHOPR2
507890 18
4491450 69
1553.94
3 05
3 03E-02
3 81E-03
4 58E-03
5.77E-04
4 11
6.10
0.96
284
CBP Loading to hopper 2
CBPHOPR3
507890 18
4491446 57
1553.81
3.05
3 03E-02
3 81E-03
4 58E-03
5.77E-04
4 11
6.10
0.96
284
CBP Loading to hopper 3
HMAHOPR1
50794964
4491436 17
1553.50
3.05
1.37E-02
1 72E-03
2 07E-03
2 61E-04
4 11
6 10
0.96
284
HMA Loading to hopper 1
HMAHOPR2
507953 76
4491436.17
1553 50
3 05
1 37E-02
1 72E-03
2 07E-03
2 61E-04
4 11
6 10
0.98
284
HMA Loading to hopper 2
HMAHOPR3
507957 87
4491436 16
1553 50
3.05
1 37E-02
1 72E-03
2.07E-03
2.61E-04
4 11
8.10
096
284
HMA Loading to hopper 3
HMAHOPR4
507961 98
4491436 16
1553 50
3 05
1 37E-02
1 72E-03
2 07E-03
2.61E-04
4 11
8 10
096
284
HMA Loading to hopper 4
HMAHOPR5
507966.09
4491436 18
1553.51
3 05
1 37E-02
1 72E-03
2 07E-03
2.61E-04
4 11
6 10
096
284
HMA Loading to hopper 5
HMAXFER1
507967 86
4491437.66
1553.55
0 91
7 92E-03
9 98E-04
2 24E-03
2.82E-04
1 22
6 10
0 28
2 84
HMA Conveyor Transfer 1
HMAHOPRL
507967 75
4491448.30
1553 87
10.67
2 71E-01
3 41E-02
3 03E-02
3.82E-03
3.66
12.19
0 85
5 67
HMA Lime hopper
HMAXFER2
507967 84
4491459 76
1554 22
0 91
7.92E-03
9.98E-04
2.24E-03
2.82E-04
1 22
12 19
0.28
5.67
HMA Conveyor Transfer 2
HMAHOPRR
507992 46
4491447.36
1553 54
3.05
1 71E-02
2 15E-03
2 59E-03
3.26E-04
3.66
6 10
0.85
2.84
HMA RAP bin / hopper
HMALOUT1
507996.18
4491476 18
1554 72
4.57
3.31 E-03
4 16E-04
3 31E-03
4.16E-04 9.61E-02 1 21E-02
884
20.73
2.06
9.64
HMA Truck Loadout. Silo 1
HMALOUT2
508000 75
4491477.24
1554 75
4.57
3.31E-03
4 16E-04
3 31E-03
4 16E-04 9.61E-02 1 21E-02
884
20 73
206
9.64
HMA Truck Loadout, Silo 2
HMALOUT3
508005.36
4491476.20
1554.71
4.57
3.31E-03
4 16E-04
3.31E-03
4 16E-04 9.61E-02 1 21E-02
884
20 73
2.06
9.64
HMA Truck Loadout, Silo 3
CRUSHER
508218 45
4491443 73
1555.38
3.66
8.10E-02
1.02E-02
1 50E-02
1 89E-03
1 52
3.66
0 35
1 70
CRUSHER
SCREENER
508088.33
4491418.13
1551 62
2.44
1 11E-01
1 40E-02
7.50E-03
9 45E-04
2.44
366
0 57
1 70
SCREENER
SCRNOUTI
508081 95
4491428 18
1551.88
1 52
6 90E-03
8.69E-04
1.95E-03
2.46E-04
0 91
0.21
0 71
SCREENER Conveyor out to stock pile 1
SCRNOUT2
508074 84
4491423.04
1551.87
1 52
6.90E-03
8 89E-04
1 95E-03
246E-04
0 91
0.21
0 71
SCREENER Conveyor out to stock pile 2
SCRNOUT3
508075 11
4491412.69
1551.58
1 52
690E-03
8 69E-04
1 95E-03
2.46E-04
0.91
0 21
0 71
SCREENER Conveyor out to stock pile 3
SCRNOUT4
508082 40
4491407 45
1551 41
1 52
690E-03
8 69E-04
1 95E-03
2.46E-04
0 91
0.21
0.71
SCREENER Conveyor out to stock pile 4
HMACBPPI
507856 86
4491405 00
1552 55
1 52
3.52E-02
4 44E-03
5 34E-03
8 73E-04
0 91
0.21
0 71
FRONT END LOADER to CBP/HMA storage pile 1
HMACBPP2
507879.56
4491404 48
1552.54
1 52
3.52E-02
4 44E-03
5 34E-03
6.73E-04
0 91
0.21
0 71
FRONT END LOADER to CBP/HMA storage pile 2
HMACBPP3
507903 95
4491405 06
1552 55
1 52
3 52E-02
4 44E-03
5 34E-03
6.73E-04
0.91
0.21
0.71
FRONT END LOADER to CBP/HMA storage pile 3
HMACBPP4
507940 36
4491403 19
1552.50
1 52
3 52E-02
4 44E-03
5.34E-03
6.73E-04
0.91
0.21
0.71
FRONT END LOADER to CBP/HMA storage pile 4
HMACBPP5
507988.32
4491404.94
1552.25
1 52
3.52E-02
4 44E-03
5 34E-03
6.73E-04
0.91
0.21
0.71
FRONT END LOADER to CBP/HMA storage pile 5
SCRNFPL1
508150 05
4491466.51
1554 80
1.52
1 98E-02
2 50E-03
3.01E-03
3.79E-04
0.91
0.21
0.71
FRONT END LOADER to screener feed pile 1
SCRNFPL2
508145 36
4491443 71
1552.86
1 52
1 98E-02
2 50E-03
3 01E-03
3 79E-04
0.91
0.21
0 71
FRONT END LOADER to screener feed pile 2
SCRNFPL3
508152 29
4491418 00
1551 94
1 52
1 98E-02
2.50E-03
3.01E-03
3.79E-04
0 91
0 21
0.71
FRONT END LOADER to screener feed pile 3
CRSHFPL1
508290 45
4491454.14
1555 60
1 52
2 98E-02
3 75E-03
4 51E-03
5 68E-04
0 91
0.21
0.71
FRONT END LOADER to crusher feed pile 1
CRSHFPL2
508291 76
4491401.53
1553 48
1 52
2 98E-02
3.75E-03
4 51E-03
5.68E-04
0.91
0 21
0.71
FRONT END LOADER to crusher feed pile 2
1/5/2018
Page 1 of 1 CactusHillEmkssions-20180102 xlsx. Volume
AERMOD LINE Sources
Source ID
X Coord. [m]
Y Coord. [m]
Base
Elevation
[m]
Release
Height [m]
Emission
Rate [g/(s-
m2)]
X2
Coordinate
[m]
Y2
Coordinate
[m]
Width [m]
Initial
Vertical
Dimension
[m]
Description
Length
(m)
Area
(m^2)
CHECK
ENTER TOTAL HAUL ROAD EMISSIONS (gIs 0.002574
166.56 .
121$.44
O.OQ$ 74
HMARD01
508037 74
4491512.14
1555 55
4.27 2.112E-06 508040.87
4491486.87
17 07
13.02
HMA Haul Road 01
25.46 186.27 0.000393
HMARD02
508040.87
4491486.87
1555.45
4.27 2 112E-06 507926.14
4491486.04
17.07
13.02
HMA Haul Road 02
114.73 839.30 0.001773
HMARD03
507926 14
4491486.04
1555.57
4.27 2.112E-06 507922.85
4491512.2
17.07
13.02
HMA Haul Road 03
26.37 192.87 0.000407
ENTER TOTAL HAUL ROAD. EMISSIONS (g/s)
0.010408
ii -Mr:
CBPRD01
508037.74
4491512 14
1555.55
4.27 2.669E-06 508040.87
4491486.87
17.07
13.02
CBP & Aggregate Storage Haul Road 01
25.46 186.27 0 000497
CBPRD02
508040.87
4491486.87
1552.46
4.27 2.669E-06 508023.16
4491427.49
17.07
13.02
CBP & Aggregate Storage Haul Road 02
61.96 453.29 0.001210
CBPRD03
508023.16
4491427.49
1551.55
4.27 2.669E-06 508023.16
4491390.46
17.07
13.02
CBP & Aggregate Storage Haul Road 03
37.03 270.88 0.000723
CBPRD04
508023.16
4491390.46
1551.26
4.27 2.669E-06 508014.06
4491378.05
17.07
13.02
CBP & Aggregate Storage Haul Road 04
15.39 112.57 0.000300
CBPRD05
508014.06
4491378.05
1551.92
4.27 2.669E-06 507843.91
4491379.47
17.07
13.02
CBP & Aggregate Storage Haul Road 05
170.16 1244.73 0.003322
CBPRD06
507843.91
4491379.47
1552.45
4.27 2.669E-06 507833.94
4491390.03
17.07
13.02
CBP & Aggregate Storage Haul Road 06
14.52 106.24 0.000284
CBPRD07
507833.94
4491390.03
1554.4
4.27 2.669E-06 507834.09
4491476.47
17.07
13.02
CBP & Aggregate Storage Haul Road 07
86.44 632.33 0.001688
CBPRD08
507834.09
4491476.47
1554.96
4.27 2.669E-06 507846.58
4491486.88
17.07
13.02
CBP & Aggregate Storage Haul Road 08
16.26 118.94 0.000317
CBPRD09
507846.58
4491486.88
1555 45
4.27 2.669E-06 507926.14
4491486.04
17.07
13.02
CBP & Aggregate Storage Haul Road 09
79.56 582.03 0 001553
CBPRD10
507926 14
4491486.04
1555.57
4.27 2.669E-06 507922.85
4491512.2
17.07
13.02
CBP & Aggregate Storage Haul Road 10
26.37 192.87 0.000515
ENTER TOTAL HAUL ROAD EMISSIONS (gls)
0.000679
RAPRD01
508037.74
4491512.14
1555.55
4.27 3.693E-07 508040.87
4491486.87
17.07
13.02
RAP Haul Road 01
25.46 186.27 0.000069
RAPRD02
508040.87
4491486.87
1555.55
4.27 3.693E-07 508233.49
4491486.61
17,07
13.02
RAP Haul Road 02
192.62 1409.06 0.000520
RAPRD03
508233.49
4491486.61
1555.55
4.27 3.693E-07 508248.85
4491457.21
17.07
13.02
RAP Haul Road 03
33.17 242.65 0.000090
1/5/2018
Page 1 of 1 CactusHillEmissions-20180102.xlsx. Line (Haul Roads PM10)
AERMOD AREACIRC Sources
Source ID
X Coord.
(m]
Y Coord.
[m]
Base
Elevation
[m]
Release
Height [m]
Emission
Rate [lb/hr]
X Side
Length [m]
HMACBPS1
HMACBPS2
HMACBPS3
HMACBPS4
HMACBPS5
SCRNFDS1
SCRNFDS2
SCRNFDS3
CRSHFDS1
CRSHFDS2
1/5/2018
507856.86
507879.56
507903.95
507940.36
507988.32
508150.05
508145.36
508152 29
508290.45
508291.76
4491405.00
4491404.48
4491405.06
4491403 19
4491404.94
4491466.51
4491443.71
4491418 00
4491454 14
4491401 53
1552.55
1552.54
1552.55
1552.50
1552.25
1554.80
1552.86
1551.94
1555.60
1553.46
1.524
1.524
1.524
1.524
1.524
1.524
1.524
1.524
1.524
1.524
8.13E-04
8.13E-04
8.13E-04
8.13E-04
8.13E-04
8.13E-04
8 13E-04
8.13E-04
8.13E-04
8 13E-04
Y Side
Length [m]
Angle from
North [deg]
Initial
Vertical
Dimension
[m]
0 7088
0.7088
0 7088
0.7088
0.7088
0.7088
0.7088
0.7088
0.7088
0.7088
Description
HMA and CBP Storage Pile 1
HMA and CBP Storage Pile 2
HMA and CBP Storage Pile 3
HMA and CBP Storage Pile 4
HMA and CBP Storage Pile 5
Screen Feed Storage Pile 1
Screen Feed Storage Pile 2
Screen Feed Storage Pile 3
Crusher Feed Storage Pile 1
Crusher Feed Storage Pile 2
Page 1 of 1 CactusHillEmissions-20180102.xlsx, Area (Storage PM10)
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GENERAL NOTES:
• LARIAEN LINER MAT ERIAL.670 BE COMPAC TED NATIVE CLAY SOLL TO
BE SORROWED FROM THE STOCKPILE ON L. CTU4 Hitt NAPIOI
PROPERTY
2 susGRADE PREPARA TON SCARIFY 70 6-INCNES IMNI AND RECOMPACT
SUBGRADE BEFORE LITER MATERIAL PBTAWttCN
3 EMITPEN LPER MATER& SC.&39E M0.ETED TO ONE III 'Cr
INCA Oh BOTTOM AAO SCEWALL6 TIE ;VIER S≥QaD SE
CONSTRUCTED P 6*0 To 10CJOI LOOSE .r TS NC The.
CAC TED C01iC1EO UFTS 5.4. NOT EXCEED SW 0) VOTES
4 CflSMC I SEAGRADE AFC SIUEW* LS SELO" CLAY t PER MA 'IstA. TO
:NM O STANOARO DRY DENSITY AT .7% 10.7% OF OPTIMA MAI TIRE
PER MTV OMS
! COMPACT CLAY LINER MATERW TO SS% OP II AWARD OR, OE W TT
AT 7% TO .3% OF OPTIMtS MOISTURE PER ASTM OEM
• ORAMAAR MATERIAL SWILL NOT BE USED IN ANY O Mt
NCCOMPAC TED MA TERM&
1 00001OIMATE ?AAENGINEER FOR DEM I TY I EStMh CONTRACTOR TO
PROVIDE 24 FOUR NOTICE PRIOR TO DENS TY TESTINO
S ENURE! RS REPRESENTATIVE IS TO SE ON SITE FOR CONSTRUCTION
OBSERVATION OURRAc CONSTRUCIION
S MOISTURE DENSITY TESTING SWIM BE A MINIMUM l> TWELVE (171
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WSE
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5177
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51196
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51799
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Simon Contractors USRI7-0043
TETRA TECH
Board of Weld County Commissioners
January 10, 2018
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CLEAR SOLUTIONS'
Simon Contractor's Hearing Team
Simon Contractors
� Brett Baker, President
� John Pinello, Construction Manager
I Rod Havens, Environmental Manager
Tetra Tech Team
• Anne Best Johnson, AICP, Planner
• Jeff Butson, P.E., Engineer
• Jeff Harrington, P.E., Senior Environmental Engineer
� Gene Coppola, P.E., Traffic Engineer
Ken Lind, Attorney, Lind, Ottenhoff & Root LLP
David Rau, P.E., Principal Engineer, Paragon Consulting Group
John Cyran, Attorney, Hoskin Farina & Kampf PC
Scott Phillips, MD Physician and Toxicologist
Mitch Little, CIH, CSP, Principal EHS Consultant, Hellman & Associates
Michael Smith, MAI, Foster Valuation
Outline
• Additional Points of Information
� Conditions of Approval
• Development Standards
(-7,1 TETRA TECH
Additional Points of Information
� Property Value Retention
� Contact at Simon for Concerns on Site
� Site Selection Criteria
I
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M11400411100
MONUM ENT SIGN
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Severance IGA
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4. Development Nodes: The Land Use Mop identifies where commercial, mixed -use or urban style
development may be appropriate outside and away from the town core. The intensity of develop-
ment will be relative to available or obtainable infrastructure. The planning and design of an devel-
opment node should take into account the transition of this intensive land use to the adjacent rural P _,j
residential or Ag residential areas.
This intersection of two busy state highways has
high traffic counts, good access into the north end
of Fort Collins on Highway 14, south on Colorado
Highway 257 to Severance and Windsor and East
to Highway 14 to Ault and Highway 85. Landowner!
developer shall meet with Town of Severance and
the Colorado Department of Transportation to
determine allowable access points onto Colorado
Highways located with the Devclopment Node.
aTOM, C (ER E
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DEVBLOPter NODES
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Additional Points of Information
I Waste Water Handling
Conditions of Approval
• IA: Weld County Access Permit
� 1B: Lighting Plan
� 1C: Landscaping/Screening Plan
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Apache
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Cotoneaster
Tall Blue
Rabbitbrush
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Honeysuckle
Heavy Metal Blue
Switchgrass
(-7,1 TETRA TECH
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Conditions of Approval
Conditions of Approval
I 1E: Overland Flow Acceptance
Condition of Approval IE - Requested Language
Change
The applicant. shall submit evidence that the downslope properly owner
from Larimer Caunty Canal company that the canal will accept all storm
water -nd drainage (overland flows) from the US property onto property
y the downsJop e property owner. of water from the property Pnto
owned
■ ■ ■ ■ ■ ■ ■ ■
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STATE 257
tihj9 El COUNTY ROAD 8a_5
3 A E HIC HWA G 257
'NEW COUNTY ROAD 80.5
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TETRA TECH
Conditions of Approval
� IG: Drainage Report
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Conditions of Approval
. 1H: Poudre Valley REA
. 11: CDOT
TETRA TECH
Conditions of Approval
� 1J: Map Modifications
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4-
Conditions of Approval
. 2, 3, 4: Submittal Requirements
. 5A: Grading Permit Requirements
. 5B: Tracking Control and Access timing
. 6A and 6B: Prior to Certificate of
Occupancy
Conditions of Approval
. 7A: Off -site improvements
. 7B: 'Emergency Action and Safety Plan
. 7D: Decommissioning Plan
. 8: Timing and Plat Recording
Development Standards
� 1 & 2 : Responsibilities associated with
approval of permit
• 3: Office Hours of Operation
mit
TETRA TECH
Requested amendment of first sentence of
Development Standard 4A4:
When the plant is operatFng at night, it will only occur when material is
requested by cities, counties, or CDOT, or private companies for night
paving projects. Operations will be considered "night opera#ions," when
they take place between the hours of one hour after sundown to one hour
before sunrise. depending on the request of the customer jurisdiction
purchasing the asphalt!J night operations could occur seven days per week.
When Simon Contractorssiructors becomes aware of projects that require
night operations, they wil email the Weld County Planning irector to let
him/her know about the • Ions to operate outside of daylight hours, who the
project is for, how long it will be occurring, and where the materials are
being delivered.
32
TETRA TECH
Development Standard 4.B. 3 & 4: hours of operation:
•
11
1
34) Ready Mix trucks will generally operate dulling plant operations, but may
return to the plant after plant shutdown to be cleaned and parked.
When the plant is o ratiR at noh#, it will on
I occur when
material is
re uested cities, counties, 'or Hrivate corn anies for nc�ltt
projects will be considered "night operations," when they take
place between thehours of one hour after sundown to one hour before
SU
n r1 a 1
eHendun on the re west of the customer purchasinq the
concrete, ht trations could occur seven da s
er week. When Simon
Contractors becomes aware of projects that require night operations, they
will email the Weld County Planning Director to let him/her know about the
plans to operate outside of daylIght hours! who the project is for, how long
be occurrin , and where the materials are bein delivered.
33
Development Standards
� 5: On -site employee numbers
� 6: Parking area maintenance
� 7: Sign Code adherence
� 8: Landscaping maintenance
� 9: Approved Emergency Action and Safety Plan
� 10: Liquid and solid waste disposal
� 11: Permanent waste disposal
� 12: Water material handling
Development Standards
• 13: Fugitive Dust
� 14: APEN
Development Standards
� 15: Noise Standards
� 16: SPCC
• 17: Secondary Containment
� 18: Vehicle Washing
Development Standards
� 19: Process wastewater
� 20: Potentially hazardous chemical handling
� 21: Soil management
� 22: Septic System
� 23: Portable toilets and bottled water
� 24: Permanent water supply of water
I 25: Septic System
NTITETRA TECH
Development Standards
• 26: Compliance with all rules and regulations of
state and federal agencies and the Weld County
Code.
The following permits are needed to operate the temporary facility and have been
obtained by Sirn on:
Temporal"! Access Permit, to be extended
c� Tetnporaiy Ue Permit to be extended
APEN for Mobile Asphalt Plant
Stack Testing of the Portable Plant
Weld County Grading Permit
o Statewide Storm water Permit
38
TETRA TECH
Development Standards
26: Compliance
with all rules and
regulations of
state and federal
agencies and the
Weld County
Code.
Land Lie Pennit, Use try Special its- — Weld. Canty
o P Aceegs Pmt Weld 1 '. StateofCdomdo
: Gess Permit for Hithraw Sernents Stamen ofColorado
Drriitmge Easetnalfor conveyance of over • flows oto the adjacent
Cactus. Ranch
Weld County Improvements Agreement ntWeld Cow;
o Right-of-way ageem. and pert — Weld County and State of Colorado
4ppro val of construction a g s for expans i on of CR 80.5 right-of-way — Weld County
o Dedication and acceptance of futura r -of -way for expansion of ..5 ri -of-way-
Weld Countv
Building Electrical rical Peimits Weld f o r
Lthe Sent(Power) Feint from Poudre Vale® REA
c mowle g ent from Platte Is/alley Power
Authority Senice a a ent from Xcel. Energy
Sent ageement from North Weld County Water I . Pict
O
C
C
C
C
C
C
Hill
gird
..kFEic for.. t Plant Ready s Plant, 'e11 I e State e of Colorado
Spill Prevention,
Water T -T
ater Act
Stomiwater Notice of Intent State of Colorado
c StornmaterI aroe A Permit State of Colorado
c Construction Stormwateas Discharge Permit State of Colorado
o St:omit ivimikngement Plan for Facility!. State of Colorado
c Agee with Ditch
o Weld G P' Weld County
County L 1
:FaCiality Emergent" Operations PlyWeld Cute
oh Count Feature Plan CSPCC for Facility EPA Clean
Development Standards
� 27: Noxious Weeds controlled
� 28: Access maintenance and tracking
• 29: No staging on public roads
Development Standards
• 30: Historic Flow Patterns
� 31: Maintenance Responsibilities
Development Standards
� 32: Lighting
� 33: Building Permits
� 34: Compliance with Design & Operation Standards
� 35: Staff access
� 36: USR Limited to Plans illustrated
� 37: Compliance with Development Standards
� 38: Right to Extract Minerals
• 39: Right to Farm
TETRA TECH
Questions?
Esther Gesick
m:
ent:
To:
Cc:
Subject:
Kim Ogle
Wednesday, January 10, 2018 9:28 AM
Tisa Juanicorena
Esther Gesick
FW: Proposed additional Language for Simon Drainage
PW Drainage has a few modifications for consideration
From: Hayley Balzano
Sent: Wednesday, January 10, 2018 8:53 AM
To: Kim Ogle <kogle@weldgov.com>
Cc: Dawn Anderson <dranderson@weldgov.com>
Subject: Proposed additional Language for Simon Drainage
Hello Kim,
I am sending potential code changes I may have to you so that when the time comes, they can be copied and pasted.
Please let me know if you have any questions or concerns.
To replace Condition of Approval 1.E:
The applicant shall submit evidence of a recorded drainage easement or drainage agreement indicating that the
property owner south of the Water Supply and Storage Irrigation Canal will accept the historical stormwater release
Ilkm the site. This easement or agreement shall allow the operator to access the property for inspection, maintenance,
d repairs of the drainage infrastructure.
Addition to Condition of Approval 1.J:
Show and label the accepted recorded drainage easement or drainage agreement and reference the reception number.
Modification of Development Standard 30:
The historical runoff amounts on site will be maintained.
Modification of Development Standard 31:
Weld County is not responsible for the maintenance of on -site and off -site drainage related features.
Hayley Balzano
Engineer I
Weld County Public Works
1111 H Street
P.O. Box 758
Greeley, CO 80632-0758
(970) 400-3738
hbalzano@weldgov.com
1
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