miller paving limited braeside quarry expansion · dispersion modelling (esdm) report as part of an...

Miller Paving Limited

Braeside Quarry Expansion

Air Quality Assessment Report

Prepared for:

Miller Paving Limited

A Division of Miller Group Inc.

505 Miller Avenue Markham, Ontario

L3R 9R8

Prepared by:

Church & Trought Inc.

106 – 885 Don Mills Road Toronto, Ontario M3C 1V9

Phone (416) 391-2527 Fax (416) 391-1931

www.churchandtrought.com

CTI Project P3053 March 2010

Miller Paving Limited - Braeside Quarry Expansion CTI Project Number: P3053 Air Quality Assessment Report

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Executive Summary

Church & Trought Inc. (CTI) was retained by Miller Paving Limited to conduct an air quality assessment for the proposed Miller Braeside Quarry expansion. The site is located on Part of Lots 16 and 17, Concession A in the Township of McNab / Braeside and the County of Renfrew, Ontario. The proposed expansion will include an increase in the total amount of aggregate to be removed and the addition of a hot-mix asphalt plant and a ready-mix concrete plant. MOE Guideline D-6 classifies the Braeside Quarry as a Class III facility. For Class III facilities, the minimum separation distance is 300 metres and the potential influence area is 1000 m. The separation distance between the area of extraction within the expanded quarry and the existing residences is 300 metres or greater. Along with the air quality assessment, CTI prepared an Emission Summary and Dispersion Modelling (ESDM) Report as part of an application for a site-wide Certificate of Approval (Air/Noise) (CofA) as required by the Ontario Ministry of the Environment (MOE). Based on the Regulation 346 model assessment, the sources of substances applicable to the CofA application meet the MOE POI limits. This air quality assessment report focused on the potential impacts from particulate matter and nitrogen oxides emissions using the AERMOD model for the assessment. All other substances were assessed as part of the ESDM Report. Based on the AERMOD model assessment of all particulate matter and nitrogen oxides emission sources on the site, it is our opinion that the impact on air quality from the site operations would not constitute an adverse effect.


Table of Contents

Executive Summary............................................................................................... i 1. Introduction........................................................................................................... 1 2. Scope of Work...................................................................................................... 1 3. Ontario Ministry of the Environment Legal Requirements .................................... 2

3.1 Certificates of Approval (Air) ................................................................................2 3.2 Guideline D-6.......................................................................................................3 3.3 Adverse Effect .....................................................................................................4

4. Sources of Air Emissions...................................................................................... 5

4.1 Overall Site Operations........................................................................................5 4.2 Hot-Mix Asphalt Plant ..........................................................................................5 4.3 Ready-Mix Concrete Plant ...................................................................................5 4.4 Aggregate Extraction and Crushing .....................................................................6 4.5 Fugitive Emissions from Roads and Storage Piles ...............................................6 4.6 Miscellaneous Ancillary Activities.........................................................................6

5. Air Quality Assessment ........................................................................................ 7 6. Dust Management Plan ...................................................................................... 12 7. Conclusions........................................................................................................ 12 8. Recommendations.............................................................................................. 12 9. Opinion ............................................................................................................... 13 Table 1 Emission Summary Table............................................................................................10 Table 2 Source Treatment in AERMOD Particulate Run ..........................................................11

Appendix A ................................Emission Rate Calculation Assumptions & Sample Calculations Appendix B .....Sample Output Files for Regulation 346 and AERMOD dispersion modelling runs Appendix C ..............................................................................................Dust Management Plan


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1 Introduction

Church & Trought Inc. (CTI) was retained by Miller Paving Limited (Miller) to conduct an air quality assessment for a proposed expansion of the Miller Braeside Quarry. The site is located on Part of Lots 16 and 17, Concession A in the Township of McNab / Braeside and the County of Renfrew, Ontario. This report has been prepared to address the potential air quality impact from the Braeside Quarry site. An Emission Summary and Dispersion Modelling (ESDM) Report, as part of a site wide Certificate of Approval (Air) (CofA) application to the Ministry of the Environment (MOE) has been prepared as a separate report. This air quality assessment report focuses on the potential impacts from particulate matter and nitrogen oxides emissions. All other substances were assessed as part of the ESDM Report.

2 Scope of Work

In order to meet the project objectives, the following tasks were completed:

1. Reviewed documentation provided by Miller including process operation descriptions, production rates and site drawings.

2. Identified air emission sources.

3. Identified potential substances released from the site and prepared emission rate

estimates using accepted emission factors.

4. Performed air dispersion modelling using the MOE Regulation 346 model to assess the maximum ground level concentrations for the substances emitted from the site emission sources to be included in the CofA application.

5. Prepared an Emission Summary and Dispersion Modelling (ESDM) Report for

the CofA application.

6. Performed air dispersion modelling using the AERMOD model to assess the maximum ground level concentrations for total particulate matter and nitrogen oxides emitted from the site.

7. Evaluated the results of the air dispersion modelling against the Point of

Impingement (POI) concentration limits set by the MOE.

8. Provided CTI’s opinion as to a reasonable separation distance for the subject area, with reference to the MOE Guideline D-6 “Compatibility between Industrial Facilities and Sensitive Land Uses”.


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9. Provided CTI’s opinion regarding the results from the air dispersion modelling

and the potential impact of the site emissions at the quarry property line and nearby residences.

10. Prepared a Dust Management Plan to be implemented at the quarry.

3 Ontario Ministry of the Environment Legal Requirements

There are three primary areas of air emission compliance with the MOE: Certificates of Approval (Air), Guideline D-6 and adverse effect as defined in the Environmental Protection Act.

3.1 Certificates of Approval (Air)

In the province of Ontario, outdoor air quality issues from industrial facilities are addressed under the Environmental Protection Act and the air pollution regulation, Ontario Regulation 419/05. Section 9 of the Environmental Protection Act stipulates that companies must obtain a Certificate of Approval (Air) (CofA) prior to the introduction of a new process, or modification of an existing process that may discharge a substance into the atmosphere. The CofA applicant must demonstrate that property line and/or off-site concentrations of substances are below the maximum concentrations at ground level (or POI limits) stated in the Regulation. The MOE considers health effects when setting these air emission standards. This process ensures minimal risk to the public and must be completed regardless of the location of sensitive land uses. At the stage of reviewing an Application for a CofA, the MOE assesses the technical information and the predicted impact on air quality. The CofA will only be granted when the MOE is confident that the emissions are below regulated levels. Adhering to an up-to-date CofA reduces the potential for a facility causing an adverse effect. The Environmental Bill of Rights Registry (EBR) was established in 1994 to provide a formal framework for notifying the public about proposed legislation, policies, regulations and other legal instruments such as applications for CofAs that could have a significant effect on the environment. In addition to providing public notification of proposed initiatives, it also provides a forum for public discussion on proposed changes being made. Most industries applying for a CofA have a description of their proposal posted on the EBR for a 30 day public comment period. The government considers all public input before making the final decision as to whether to grant approval to the applicant.


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3.2 Guideline D-6

The Provincial Policy Statement indicates that industries and sensitive land uses, including residences, should be appropriately designed, buffered and/or separated from each other to prevent adverse effects from odour, noise and other substances and to minimize risk to public health and safety. According to the MOE, Guideline D-6 – Compatibility Between Industrial Facilities and Sensitive Land, all types of industrial land uses have the potential to produce point source and/or fugitive air emissions such as odour, dust and others whether through normal operations, procedures, maintenance or storage activities, and/or from associated traffic/transportation. The MOE Guideline D-6 recommends separation distances between existing industrial facilities and proposed residential developments. Recommended distances are based on the Class of the industry that may have an impact including outputs, scale, process and intensity of industry. Air quality assessments that are conducted to determine the potential impact at a proposed development from local industries typically focus on nuisance substances, consisting of odour, fugitive dust and others. The three industry classes are defined as follows with respect to odour and dust emissions: A Class I Industrial Facility is defined as a place of business for a small scale, self-contained plant or building which produces/stores a product which is contained in a package and has low probability of fugitive emissions. Outputs are infrequent, and could be a point source or fugitive emissions of odour and/or dust. There are daytime operations only, with infrequent movement of products and/or heavy trucks, and no outside storage. Typically odour and/or dust emissions are infrequent and not intense. A Class II Industrial Facility is defined as a place of business for medium scale processing and manufacturing with outdoor storage of wastes or materials, and results in periodic outputs of minor annoyance. There are occasional outputs of either point source or fugitive emissions of odour and/or dust. Shift operations are permitted and there is frequent movement of products and/or heavy trucks during daytime hours. Typically odour and dust emissions are frequent and occasionally intense. A Class III Industrial Facility is a place of business for large scale manufacturing or processing, characterized by large physical size, outside storage of raw and finished products, large production volumes, and continuous movement of products and employees during daily shift operations. It has frequent outputs of major annoyance and there is a high probability of point source and fugitive emissions of odour and/or dust. Typically odour and dust emissions are persistent and intense. Emissions from a facility are described as being either point source or fugitive emissions. Point source emissions are those emissions that have been collected and discharged through a device such as an exhaust stack. Fugitive emissions are defined as emissions that are not collected, but escape uncontrolled from a facility through openings such as doors, windows, and cracks in walls.


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The MOE has identified, through case studies and past experiences, Minimum Separation Distances. These are distances between industrial and sensitive land uses where no development should occur. The recommended minimum separation distances are as follows:

• 20 m for Class I industries;

• 70 m for Class II industries; and

• 300 m for Class III industries. The MOE Guideline D-6 states that in the absence of site specific studies when sensitive land use encroaches on a pit or quarry the appropriate criteria are the recommended minimum separation distances for Class III facilities. Class III facilities require a minimum separation distance of 300 m with a potential area of influence of 1000 m. The potential area of influence is defined as an area where adverse effects are generally expected to occur. In measuring the separation distance, the guideline states that normally the distance is measured from the property lines of the industrial land use to the property lines of the sensitive land use (residences). There is however, a provision for providing separation distance on the facility site. This would be applicable where there are no activities within the separation distance that would cause an ‘adverse effect’ at the sensitive land use. Per Guideline D-6, in exceptional circumstances, the MOE may recommend distances greater than the potential influence area.

3.3 Adverse Effect

The overriding philosophy of the Environmental Protection Act and the Air Pollution – Local Air Quality Regulation 419/05 is to prevent emissions from a facility causing an adverse effect, or cause harm to people, the environment or the loss of enjoyment of normal use of property. Operating a site with a CofA does not prevent the air emissions from the site from causing an adverse effect. In other words, a company can still be found in violation of the Environmental Protection Act (Section 14) even when they have a CofA, if the MOE can demonstrate that they caused an adverse effect. Adverse effect is defined in the Environmental Protection Act as meaning one or more of:

a) Impairment of the quality of the natural environment for any use that can be made of it;

b) Injury or damage to property or to plant or animal life; c) Harm or material discomfort to any person; d) An adverse effect on the health of any person; e) Impairment of the safety of any person; f) Rendering any property or plant or animal life unfit for human use;


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g) Loss of enjoyment or normal use of property; or h) Interference with the normal conduct of business.

4 Sources of Air Emissions

4.1 Overall Site Operations

The proposed expanded quarry site will include the following major operations:

• Hot-Mix Asphalt (HMA) plant

• Ready-Mix Concrete (RMC) plant

• Aggregate extraction and crushing

• Traffic on-site on quarry roads and activity on storage piles, and

• Miscellaneous ancillary activities Each of these major operations is described in the following report sections. The procedures and assumptions used for calculating emissions rates are provided in Appendix A.

4.2 Hot-Mix Asphalt Plant

Hot-Mix Asphalt (HMA) paving materials are a mixture of size-graded, high quality aggregate, heated liquid asphalt cement, and recycled asphalt. The HMA plant includes the following processes which release air emissions:

• Drum mixer with a baghouse on the exhaust stack

• Hot oil heater

• HMA load-out via the HMA Storage Silo

• HMA trucks

• 2 Liquid Asphalt Cement Storage Tanks

• Loading at HMA Storage Silo

4.3 Ready-Mix Concrete Plant

Concrete is composed essentially of water, cement, cement supplement, sand (fine aggregate) and course aggregate (e.g. gravel, crushed stone etc). The Ready-Mix Concrete (RMC) plant includes the following processes which release air emissions:

• Sand and aggregate transfer to the conveyor

• Sand and aggregate transfer to the weigh hopper

• Loading of Cement and Cement Supplement Silos with Baghouses

• RMC load-out into trucks


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• A boiler fuelled by either natural gas or propane

4.4 Aggregate Extraction and Crushing

Aggregate extraction and crushing in the quarry includes the following processes which potentially release air emissions:

• Blasting and Drilling of the rock face

• Crushing aggregate material (includes primary and secondary crushing, primary and secondary screening and a diesel generator only if the crushing operation is temporary and external power otherwise)

4.5 Fugitive Emissions from Roads and Storage Piles

Fugitive emissions include the following processes which potentially release air emissions:

• Wind erosion from aggregate material storage piles in the quarry

• Road dust emissions from paved roads (property entrance and roadways to the HMA and RMC plants ie. access roads)

• Road dust emissions from unpaved roads (internal roads in the quarry).

4.6 Miscellaneous Ancillary Activities

Miscellaneous ancillary activities include the following processes which potentially release air emissions:

• Natural gas comfort heating from the office

• Maintenance welding

• Parts washer solvent

• QA/QC laboratory

• Fuel storage tanks (for on-site equipment fuelling) The MOE “Procedure for Preparing an Emission Summary and Dispersion Modelling Report, Version 3.0” dated March 2009 (MOE Procedure) considers these miscellaneous emission sources to be negligible and does not require emission rates to be calculated or modeled for the CofA application. For the purposes of this report these miscellaneous emission sources were considered insignificant.


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5 Air Quality Assessment

Basis of Assessment Emission rate calculation assumptions and sample calculations are included in detail in Appendix A. This includes emission estimates for roadways with assumed control activities. However, since the site will be implementing a Dust Management Plan (Appendix C), the emissions from the roadways are not included in the assessment of the POI concentration. For Regulation 419 Schedule 2 issues (Certificate of Approval assessment), the Regulation 346 dispersion model was used. The Regulation 346 model provides a prediction of the level of impact of the operation’s emission sources which meets MOE acceptability criteria. In assessing Regulation 419 Schedule 2 compliance, significant sources from the HMA and RMC plants were included. As the quarry processing plant is a portable unit and is located below grade, emissions from the process are excluded. The processing plant is considered portable if it operates for no more than 60 days in an operating season. On-site truck traffic, and storage piles were not included as emissions from these sources are addressed in the Dust Management Plan, as per MOE guidance. Per MOE “Procedure for Preparing an Emission Summary and Dispersion Modelling Report” (Version 3.0, March 2009), an assessment of the significance of contaminants and sources was carried out. Four primary steps were used to assess significance. The first step was to identify sources which are deemed negligible by the Procedure (refer to sections 3.1 to 3.8). The second step was to screen out sources of a contaminant which contribute a source emission rate of less than 5% of the site emission rate. The third step was to screen out the aggregate emissions of a contaminant using the Emission Threshold calculation described in the Procedure section 7.1.2. The fourth step was to screen out contaminants using the Reg. 346 dispersion model. Schedule 2 Assessment Modeling Based on the emission rates, the maximum half-hour Point-of-Impingement (POI) concentrations for the substances emitted were compared to the Ministry of the Environment’s (MOE) ‘Summary of Standards and Guidelines to support Ontario Regulation 419: Air Pollution – Local Air Quality, February 2008’ and ‘Jurisdictional Screening Level (JSL) List, February 2008’, criteria. Results of Regulation 346 Modelling: The predicted maximum concentration calculated for all significant substances using the Regulation 346 model were below the POI limits (refer to Table 1 for the Reg. 346


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modelling results). The Regulation 346 model provides a prediction of the level of impact of the operation’s emission sources which meets MOE acceptability criteria. Particulate and NOx Air Quality Assessment In order to obtain a more comprehensive assessment of the potential impact of particulate and NOx emissions beyond the property, the AERMOD model was used. Modelling was conducted following the Ontario Ministry of the Environment (MOE) “Air Dispersion Modelling Guideline for Ontario Version 2.0” dated March 2009. The MOE supplied terrain data was used to develop the terrain data for AERMOD using the AERMAP (06341) processor. The quarry outline elevation was not used since the quarry sources are treated as an open pit source where all sources in the quarry are lumped into a single source at an elevation of 4 m off the quarry floor, and the top of the terrain surrounding the quarry is assumed to be represented by the elevation data from the MOE file as is. The land use classification of “Forest” was used to account for the significant roughness elements surrounding the site. Hourly, five-year meteorological data provided by Environment Canada on their website for the Ottawa, Peterborough, and Belleville area was used in the model. This regional data set uses the Ottawa Airport hourly data and the Maniwaki upper air data for the period of 1996 to 2000. The Ottawa airport is about 20 km from the Braeside Quarry, making the meteorological data representative for the site. The MOE pre-approves the use of the regional meteorological data sets they provide for AERMOD modelling. Approval must be obtained from the MOE prior to modelling in order to use more site specific meteorological data sets. The HMA and RMC storage piles, and the roadway emissions on-site, were not included in the modelling as they are dealt with by the Dust Management Plan. To be conservative, the model was run for particulate emission sources operating concurrently. The worst case for emissions from the quarry occurs when there is a blasting operation scheduled on that day. Since the AERMOD model is being used to model the 24 hour particulate, a combined 24 hour average emission rate is calculated as follows:

The crushing and screening operations are continuous at the maximum rate for the 18 hour duration of operations (0.3357 g/s per Appendix). The diesel generator emissions are included for the duration of operations (0.422 g/s per Appendix). The drilling of rock for blasting are included for the duration of operations (0.00722 g/s per Appendix).


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The blasting operations, which are short lived, occur once a day when blasting is done and are shown in the Appendix to release a total of 158.6 kg of Total Particulate. The combined averaged emission rate is calculated as

Quarry Rate = (158.6 kg/24 hr *1000 g/kg /3600 s/hr)+((0.3357+0.422+0.00722)*18 hr/24 hr) = 2.409 g/s

This represents a conservative maximum worst-case scenario since these maximum operating conditions are based on process equipment maximum rated capacities. Actual facility maximum operations will not approach these conditions due to material and equipment scheduling logistics. Although the quarrying operations are carried out during the April to October period, the modeling assumed year round operation. The quarry sources are modelled as a single open pit source. To obtain conservative estimates, quarry dimensions that were input to the model were 550 m by 550 m and 10 m deep, for a total volume of the open quarry of 3,025,000 cubic metres. All sources are lumped into a single source located at a height of 4 metres above the quarry floor. The AERMOD model for open pit sources determines the amount of material which makes it out of the quarry, depending on the size distribution of the particulate, and then calculates off-site concentrations using the area source model for the escaping portion. Since the Open Pit source requires an emission rate per square meter, the model input value for the source is 2.409/(550*550) = 7.95 E-06 g/s. Hourly emission rates for all particulate matter emission sources were input into the AERMOD model. The AERMOD model predicted a 24-hour POI concentration for total particulate matter which was compared to the MOE 24 hour POI standard. Hourly emission rates for all nitrogen oxides emission sources (excluding mobile and portable equipment) were also input into the AERMOD model. The AERMOD model predicted one hour and 24 hour POI concentrations for nitrogen oxides, which were compared to the MOE one hour and 24 hour average POI standards. Results of AERMOD Modelling: AERMOD model assessment of the particulate matter emission sources on the site meets the 24-hour MOE POI limit for particulate matter at the property line. The highest 24 hour concentration over the five year period is 100.2 µg/m3 which is below the Schedule 3 POI Standard. The maximum hourly nitrogen oxides concentration is 162 µg/m3, which is below the MOE Schedule 3 POI standard of 400 µg/m3, while the daily maximum is 91 µg/m3, which is below the 24 hour MOE Schedule 3 POI standard of 200 µg/m3.


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Table 1: Emission Summary Table - Schedule 2 Assessment (Regulation 346 Modelling)

Contaminant Name CAS#

Total

Facility

Maximum

Emission

Rate

(g/s)

Air

Dispersion

Model

Used

Max. POI

Concentration

(µg/m3)

Avera

gin

g P

eriod

(hr)

POI Limit

(1/2-hr)

(µg/m3)

Limiting

Effect

Regulation Schedule # or

Alternate

Maximum

% of POI

Limit

1-Pentene 109-67-1 0.046 Reg 346 1.4 0.5 108 - Half-hour MOE JSL (2) 1%

2-Methyl-1-pentene 763-29-1 0.083 Reg 346 2.5 0.5 - - - -

2-Methyl-2-butene 513-35-9 0.012 Reg 346 0.37 0.5 318 - Half-hour MOE JSL (2) <1%

Benzene 71-43-2 0.0081 Reg 346 0.25 0.5 7 - Proposed 1/2 hour Std (3) 4%

Benzo(a)pyrene 50-32-8 0.0000012 Reg 346 0.00012 0.5 0.0033 Health Guideline (1) 4%

n-Butane 106-97-8 0.014 Reg 346 0.42 0.5 22,800 - Half-hour MOE JSL (2) <1%

Carbon Dioxide 124-38-9 690 Reg 346 21000 0.5 63,000 - Half-hour MOE JSL (2) 33%

Carbon Monoxide 630-08-0 2.7 Reg 346 82 0.5 6,000 Health 2 1%

Ethylene 74-85-1 0.15 Reg 346 4.4 0.5 40 Vegetation Guideline (1) 11%

Formaldehyde 50-00-0 0.065 Reg 346 2 0.5 65Odour /

Irritation2 3%

Methane 74-82-8 0.26 Reg 346 8.4 0.5 - - - -

Naphthalene 91-20-3 0.014 Reg 346 0.41 0.5 36 Odour Guideline (1) 1%

NOx 10102-44-0 12 Reg 346 350 0.5 500 Health 2 70%

Silica 14808-60-7 0.062 Reg 346 8 0.5 15 Health Guideline (1) 53%

Sulphur Dioxide 7446-09-5 2.3 Reg 346 69 0.5 830 Health 2 8%

Particulate Matter (4) TSP 0.97 Reg. 346 46 0.5 100 Visibility 2 46%

NOTES:

(2) JSL is the MOE 'Jurisdictional Screening Level' (February 2008)

(1) Taken from "Summary of Standards and Guidelines & Ambient to support Ontario Regulation 419, February 2008

(3) Proposal to Amend Ontario Regulation 419/05: Air Pollution – Local Air Quality, under the Environmental Protection Act, to include an Ontario

Air Standard for Benzene, July 31, 2009

(4) The particulate sources that were determined to be significant include the drum mixer baghouse, RMC cold feed bin emissions, RMC weigh

hopper emissions, the HMA trucks, and the RMC truck loadout


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Table 2: Source Treatment in AERMOD Particulate Run

*** POINT SOURCE DATA ***

NUMBER EMISSION RATE BASE STACK STACK STACK STACK BLDG URBAN CAP/

SOURCE PART. (USER UNITS) X Y ELEV. HEIGHT TEMP. EXIT VEL. DIAMETER EXISTS SOURCE HOR

ID CATS. (METERS) (METERS) (METERS) (METERS) (DEG.K) (M/SEC) (METERS)

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

MIXBAGH 2 0.68800E+00 78.0 312.0 141.0 10.70 422.00 45.70 0.80 YES NO NO

BOILER 1 0.19000E-02 148.0 91.0 145.0 5.00 523.00 1.40 0.30 YES NO NO

*** VOLUME SOURCE DATA ***

NUMBER EMISSION RATE BASE RELEASE INIT. INIT. URBAN EMISSION RATE

SOURCE PART. (USER UNITS) X Y ELEV. HEIGHT SY SZ SOURCE SCALAR VARY

ID CATS. (METERS) (METERS) (METERS) (METERS) (METERS) (METERS) BY

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

HMALOAD 1 0.33900E-01 60.0 301.0 141.0 18.30 4.00 4.00 NO

SILO1 2 0.62200E-02 138.0 88.0 145.0 20.00 6.00 6.00 NO

SILO2 2 0.62200E-02 154.0 86.0 145.0 14.00 5.00 5.00 NO

RMCBIN 3 0.95000E-01 170.5 58.0 145.0 4.00 4.00 4.00 NO

RMCHOPP 3 0.13500E+00 155.0 85.0 145.0 4.00 4.00 4.00 NO

*** OPENPIT SOURCE DATA ***

NUMBER EMISSION RATE COORD (SW CORNER) BASE RELEASE X-DIM Y-DIM ORIENT. VOLUME URBAN

SOURCE PART. (USER UNITS X Y ELEV. HEIGHT OF PIT OF PIT OF PIT OF PIT SOURCE

ID CATS. /METER**2) (METERS) (METERS) (METERS) (METERS) (METERS) (METERS) (DEG.) (M**3)

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

QUARRY 3 0.79470E-05 325.0 -165.0 141.0 4.00 550.00 550.00 -30.00 .30250E+07 NO


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6 Dust Management Plan

A Dust Management Plan to be implemented at the quarry has been prepared and is included in Appendix C.

7 Conclusions

Based on the results of the air quality assessment, the following conclusions can be made:

Based on the results of the Regulation 346 dispersion model all air emissions meet MOE criteria and therefore it is appropriate for approval.

1. MOE Guideline D-6 classifies the quarry site as a Class III industrial facility. The minimum separation distance for Class III facilities is 300 metres and the potential influence area is 1000 m. The separation distance between the area of extraction at the expanded quarry and the existing residences is 300 metres or greater.

2. Based on the AERMOD model assessment of the particulate matter emission sources, the 24-hour MOE POI limit for particulate matter is met at the property line and closest residences. No further mitigation is required beyond the requirements of the Dust Management Plan, included in Appendix C.

3. Based on the AERMOD model assessment of the nitrogen oxides emission sources on the site, the one-hour and 24-hour MOE POI limits for nitrogen oxides is met at the closest residences.

4. The impact on air quality from the site operations would not constitute an adverse effect at the property line, at the residences, within or beyond the 1000 metre area of influence.

8 Recommendations

Based on the results of the air quality assessment, the following recommendations can be made: 1. The Braeside Quarry obtain a CofA for air and noise emissions. 2. The Dust Management Plan, included in Appendix C, be adopted.


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9 Opinion

Based on information provided to CTI, the proposed area of extraction within the quarry meets the recommended minimum separation distance for a quarry outlined in Guideline D-6. Based on the Regulation 346 model assessment the air emissions from sources of substances applicable to the CofA application meet the MOE POI limits. Based on the AERMOD model assessment of particulate matter and nitrogen oxides emission sources on the site, in our opinion the impact on air quality from the site operations would not constitute an adverse effect, provided that the Dust Management Plan is followed.

John Trought, P.Eng. Dated March 8, 2010


APPENDIX A

Emission Rate Calculation Assumptions &

Sample Calculations


A-1

Emission Rate Calculation Assumptions and Sample Calculations The following sections list the assumptions used in the emission rate calculations for each operation and sample calculations for each. A.1 Hot Mix Asphalt Plant A.1.1 Drum Mixer Emissions from the HMA drum mixer were calculated using emission factors from AP42 Chapter 11.1 Hot Mix Asphalt Plant (March 2004) based on the following assumptions:

• Drum mixer is fired with No. 2 fuel oil

• HMA plant maximum capacity is 150 MT/hr

• Exhaust from the HMA drum mixer is directed through a baghouse prior to its release to the atmosphere

The emissions from the No. 2 fuel oil-fired HMA drum mixer were calculated using the maximum AP42 Chapter 11.1 Hot Mix Asphalt Plant (March 2004) emission factors for a No. 2 fuel-oil fired drum mixer and a facility capacity of 150 MT/hr. Particulate emissions from the drum mixer were calculated in grams per second (g/s) using emission factors shown in the formula below:

AP42 emission factor, lb/ton x 0.5 (to convert to kg/MT) x 150 MT/hr x 1000 g/kg / 3600 s/hr

= 0.033 lb/ton * 0.5 * 150 MT/hr * 1000 g/kg / 3600s/hr = 0.688 g/s A.1.2 Hot Oil Heater Emissions from the HMA hot oil heater were calculated using emission factors from AP42 Chapter 11.1 Hot Mix Asphalt Plant (March 2004) and Chapter 1.3 Fuel Oil Combustion (Sept 1998) based on the following assumptions:

• Hot oil heater is fired with No. 2 fuel oil

• Heater capacity is 1.1 MMBTU/hr

• Fuel oil heating value of 140 MMBTU/1000 gal oil A.1.3 HMA Loadout Emissions from loading the HMA into the trucks for shipment were calculated using emission factors from AP42 Chapter 11.1 Hot Mix Asphalt Plant (March 2004) based on the following assumptions:


A-2

• HMA plant maximum load out capacity is 150 MT/hr

• HMA temperature during loadout of 350ºF A.1.4 HMA Trucks Emissions from the HMA while the truck is driving to the gate were calculated using emission factors from AP42 Chapter 11.1 Hot Mix Asphalt Plant (March 2004) based on the following assumptions:

• HMA plant maximum load out capacity is 150 MT/hr

• HMA temperature during loadout of 350ºF A.1.5 Asphalt Cement Storage Tanks Emissions from the liquid asphalt cement storage tanks were calculated using the Ideal Gas Law equation in combination with Antoine’s equation to determine the vapour pressure of the liquid asphalt at tank temperature. Emissions were speciated based on AP42 Chapter 11.1 Hot Mix Asphalt Plant (March 2004). The following assumptions were used:

• One load of 40,000L would be delivered in 1 hour

• Liquid asphalt cement temperature of 305ºF while in storage

• Asphalt molecular weight of 105 g/mol

• No controls on storage tank emissions A.1.6 HMA Storage Silo Filling Emissions from the HMA storage silo filling were calculated using emission factors from AP42 Chapter 11.1 Hot Mix Asphalt Plant (March 2004) based on the following assumptions:

• HMA storage silo capacity is 150 MT/hr

• HMA temperature during silo filling of 350ºF

and using the formula below:

For particulate matter emissions:

AP42 emission factor, where E = 0.000332 + 0.00105 (-V) * e(0.0251 * (T+460) - 20.43),

lb/ton V = asphalt volatility of -0.5 T = hot mix asphalt temperature of 350ºF


A-3

AP42 emission factor, lb/ton * 0.5 (to convert to kg/MT) * silo storage capacity, MT/hr * 1000 g/kg / 3600 s/hr = 8.08 x10-4 lb/ton * 0.5 * 150 MT/hr * 1000 g/kg / 3600 s/hr = 1.68 x10-2 g/s

Emissions from HMA loadout were calculated using emission factors from AP42 Chapter 11.1 using the formula below: For particulate matter emissions:

AP42 emission factor, where E = 0.000181 + 0.00141 (-V) * e(0.0251 * (T+460) - 20.43),

lb/ton V = asphalt volatility of -0.5 T = hot mix asphalt temperature of 350ºF

AP42 emission factor, lb/ton * 0.5 (to convert to kg/MT) * loadout capacity, MT/hr * 1000 g/kg / 3600 s/hr = 8.20 x10-4 lb/ton * 0.5 * 150 MT/hr * 1000 g/kg / 3600 s/hr = 1.71 x 10-2 g/s

Therefore, the total emission rate for silo filling/loadout is 1.68 x10-2 g/s + 1.71 x 10-2 g/s = 3.39 x 10-2 g/s A.2 Ready Mix Concrete Plant A.2.1 Sand Transfer to Conveyor Emissions from transferring sand from cold bin storage to the conveyor were calculated using emission factors from AP42 Chapter 11.2 Concrete Batching Plant (June 2006) based on the following assumptions:

• RMC maximum production rate of 170 MT/hr

• Concrete sand content of 35%

• 100% of the sand is silica and therefore the silica emission rate equals the total particulate emission rate

A.2.2 Aggregate Transfer to Conveyor Emissions from transferring aggregate from cold bin storage to the conveyor were calculated using emission factors from AP42 Chapter 11.2 Concrete Batching Plant (June 2006) based on the following assumptions:


A-4


• Concrete aggregate content of 46% Emissions from the cold feed bin (A.2.1 and A.2.2, above) were calculated using emission factors from AP42 Chapter 11.2 Concrete Batching (June 2006), Table 11.12-1, using the formulas below: For particulate matter emissions from sand transfer: AP42 Emission factor (kg/tonne) * Maximum throughput, sand (tonne/hour) * 1000 g/kg * 1 hour/3600 seconds = 0.0011 kg/tonne * 60 tonne/hour * 1000 g/kg * 1 hour/3600 seconds = 0.018 g/s For particulate matter emissions from aggregate transfer: AP42 Emission factor (kg/tonne) * Maximum throughput, aggregate (tonne/hour) * 1000 g/kg * 1 hour/3600 seconds = 0.0035 kg/tonne * 79 tonne/hour * 1000 g/kg * 1 hour/3600 seconds = 0.077 g/s Therefore, the total cold feed bin emissions are 0.018 g/s + 0.077 g/s = 0.095 g/s A.2.3 Sand & Aggregate Transfer to Weigh Hopper Emissions from transferring sand and aggregate from the conveyor to the weigh hopper were calculated using emission factors from AP42 Chapter 11.2 Concrete Batching Plant (June 2006) based on the following assumptions:


• Concrete sand content of 35%

• Concrete aggregate content of 46%

• 100% of the sand is silica and therefore the silica emission rate equals the particulate emission rate from the sand transfer

using the formula below: For particulate matter emissions: AP42 Emission factor (kg/tonne) * Maximum throughput, sand & aggregate (tonne/hour) * 1000 g/kg * 1 hour/3600 seconds = 0.0026 kg/tonne * 139 tonne/hour * 1000 g/kg * 1 hour/3600 seconds = 0.10 g/s


A-5

A.2.4 Cement and Cement Supplement Silo Filling Metal emissions from filling the cement and cement supplement silos were calculated using emission factors from AP42 Chapter 11.2 Concrete Batching Plant (June 2006). Since the emission factors for a cement supplement silo were higher than those for a cement silo that cement supplement emission factors were used. The particulate emissions were estimated using the MOE approved emission factor for baghouses. The following assumptions were used:

• One cement supplement silo was filled with a maximum of 40 MT of material in an hour

• Exhaust from the cement silo is directed through a fabric filter prior to its release to the atmosphere

• Exhaust flowrate through the fabric filter of 660 cfm The TSP emission factor of 20 mg/m3 was recommended in the MOE Procedure document and, therefore, has an Above Average data quality.

TSP emissions from the cement supplement silos were calculated using the formula below:

Baghouse Flowrate, m3

s�

Maximum Outlet Loading, mg

m3

/1000 mg

g

= 0.31 m3/s * 20 mg/m3 / 1000 mg/g = 6.23 x 10-3 g/s

A.2.5 RMC Truck Loading Metal emissions for RMC Truck Loading were calculated using emission factors from AP42 Chapter 11.2 Concrete Batching Plant (June 2006) which are based on ton of cement and cement supplement loaded. The particulate emissions were calculated using an emission factor from Australia’s National Pollutant Inventory Emission Estimation Technique Manual for Concrete Batching and Concrete Product Manufacturing Report (February 1999). The following assumptions were used:

• Maximum RMC truck loading rate of 170 MT/hr

• Cement and cement supplement content of concrete of 15%

• NPI Uncontrolled Emission Factor (from Table 6 of document reference above) is 0.01 kg/MT

• Exhaust from the loading bay is directed through a fabric sock

• A conservatively assumed control factor of 50% was applied to the uncontrolled emission factor to account for the fabric sock used at Braeside, which encloses the drop zone between the weigh hopper and the truck.


A-6

TSP emissions from the truck loading were therefore calculated using the formula below: 170 MT/hour loading rate x 15% concrete content = 25.5 MT/hour Uncontrolled TSP emissions = 25.5 MT/hour x 0.01 kg/MT x 1000 g/kg x 1 hour/3600 sec = 7.08 x 10-2 g/s Applying the 50% control efficiency, the TSP emission rate = 7.08 x 10-2 g/s x 50% = 3.54 x 10-2 g/s A.2.6 RMC Natural Gas or Propane Boiler The RMC boiler may operate on either natural gas or propane. To be conservative, the particulate emission rate for each fuel type was calculated and the maximum value selected. Natural gas emissions from the boiler were calculated from AP42 Chapter 1.4 Natural Gas Combustion (July 1998) for small industrial boilers <100 MMBTU/hr and propane emissions were calculated from AP42 Chapter 1.5 Liquefied Petroleum Gas Combustion (October 1996) for industrial boilers. A natural gas heating value of 1020 MMBTU/ million scf of natural gas and a propane heating value of 91.5 MMBTU/1000 gal of propane burned were used as suggested by respective AP42 Chapters. The boiler capacity was 2 MMBTU/hr. Particulate emissions from propane combustion were calculated using the formula below:

(AP42 emission factor, lb/1000 US gal of propane) * (1000 US gal of propane/ heating value MMBTU) * (boiler capacity, MMBTU/hr) * 454 g/lb * hr/3600s = (0.6 lb/1000 US Gal) * (1000 US gal/91.5 MMBTU) * 2 MMBTU/hr * (454 g / lb) * (1 hr/3600s) = 1.66 x 10-3 g/s

Particulate emissions from natural gas combustion were calculated using the formula below:

(AP42 emission factor, lb/106 scf) / (106 scf of natural gas/heating value MMBTU) * (boiler capacity, MMBTU/hr) * 454 g/lb * hr/3600s = (7.6 lb/106 scf) * (106 scf /1020 MMBTU) * 2 MMBTU/hr * (454 g / lb) * (1 hr/3600s) = 1.88 x 10-3 g/s

Therefore the maximum value of 1.88 x 10-3 g/s is from natural gas combustion.


A-7

A.3 Aggregate Extraction and Crushing A.3.1 Blasting The emission factor based on 24300 tonnes of rock per blast (operator information) spread out over an area of 5000 m2 (which is about 2 m deep) gives an emission of:

E = 0.000014 x A1.5

= 0.000014 x (5000*10.76)1.5

= 174.7 lb = 79.3 kg of PM10 (Michigan DEQ reference)

Our assumption is that half of the PM is PM10 so the total PM emission is 158.6 kg. Expressed on a 24 hour average basis this amounts to 1.84 g/s. A.3.2 Drilling Particulate emissions from drilling were calculated using emission factors from AP42 Chapter 11.19.2 Crushed Stone Processing and Pulverized Mineral Processing (August 2004) for wet drilling. The following assumptions were used:

• Maximum quantity of material dislodged in one blast of 12,000 yd3

• Weight of limestone rock of 165 lb/ft3

• 3.7 days required to drill for one blast at 10 hr/day For particulate matter emissions: AP42 Emission factor (lb/ton) * Capacity (ton/hour) * 454 g/lb * 1 hour/3600 seconds = 0.00008 lb/ton * 714 ton/hour * 454 g/lb * 1 hour/3600 seconds = 7.22 x 10-3 g/s A.3.3 Aggregate Crushing Aggregate crushing in the quarry is completed with a mobile crushing plant which potentially releases particulate emissions. The crushing plant includes: primary and secondary crushing, primary and secondary screening and a diesel generator. Particulate emissions from the mobile crusher were calculated using emission factors from US EPA AP42 Chapter 11.19.2 Crushed Stone Processing and Pulverized Mineral Processing (August 2004). Particulate emissions from the crusher diesel generator were calculated using emission factors from AP42 Chapter 3.3 Gasoline and Diesel Industrial Engines (October 1996). The following assumptions were used:

• Maximum rate for loading and operating the primary crusher and screen is 450 MT/hr

• Maximum rate for operating the secondary crusher and screen is 250 MT/hr


A-8

• Transfer of aggregate from the crushing plant to storage piles by conveyor at a rate of 250 MT/hr

• Water control systems were engaged at the crushing plant, therefore controlled emission factors were used

• Maximum generator capacity of 1135 kW/hr For particulate matter emissions from the primary crushing: AP42 Emission factor (lb/ton) * Capacity (ton/hour) * 454 g/lb * 1 hour/3600 seconds = 0.0012 lb/ton * 495 ton/hour * 454 g/lb * 1 hour/3600 seconds = 7.49 x 10-2 g/s For particulate matter emissions from secondary crushing: AP42 Emission factor (lb/ton) * Capacity (ton/hour) * 454 g/lb * 1 hour/3600 seconds = 0.0012 lb/ton * 275 ton/hour * 454 g/lb * 1 hour/3600 seconds = 4.16 x 10-2 g/s For particulate matter emissions from primary screening: AP42 Emission factor (lb/ton) * Capacity (ton/hour) * 454 g/lb * 1 hour/3600 seconds = 0.0022 lb/ton * 495 ton/hour * 454 g/lb * 1 hour/3600 seconds = 1.37 x 10-1 g/s For particulate matter emissions from secondary screening: AP42 Emission factor (lb/ton) * Capacity (ton/hour) * 454 g/lb * 1 hour/3600 seconds = 0.0022 lb/ton * 275 ton/hour * 454 g/lb * 1 hour/3600 seconds = 7.63 x 10-2 g/s For particulate matter emissions from transfer: AP42 Emission factor (lb/ton) * Capacity (ton/hour) * 454 g/lb * 1 hour/3600 seconds = 0.00014 lb/ton * 275 ton/hour * 454 g/lb * 1 hour/3600 seconds = 4.86 x 10-3 g/s Particulate emissions from the crusher diesel generator were calculated using emission factors from AP42 Chapter 3.3 Gasoline and Diesel Industrial Engines (October 1996). The maximum generator capacity is 1135 kW/hour. Particulate emissions were calculated as shown below:


A-9

(AP42 emission factor, lb/hp-hour) * 0.608 (to convert to kg/kW-hour) * capacity of generator (kW/hour) * 1000 g/kg * 1 hr/3600s = 0.0022 lb/hp-hour * 0.608 * 1135 kW/hour * 1000 g/kg * 1 hr/3600s = 0.422 g/s

A.4 Fugitive Emissions from Roads and Storage Piles A.4.1 Road Dust Vehicular traffic on paved and unpaved roads is potentially a significant source of dust emissions. As trucks travel they re-suspend particulate matter from the roadway. The roadways have not been included in the modelling, as a Dust Management Plan has been prepared. The internal roads in the quarry are unpaved. A.4.1.1 Unpaved Roads Particulate emissions from unpaved roads were calculated using emission factors from AP42 Chapter 13.2.2 Unpaved Roads (November 2006). The following assumptions were made regarding vehicle traffic on unpaved roads:

• average weight of trucks on paved roads is 15 ton (average of full and empty trucks)

• the crushing plant can operate at a maximum capacity of 450 MT/hr (495 ton/hr). However, the maximum shipping rate could be a maximum of 1200 MT/hour (1325 ton/hour), which would require approximately 55 trucks/hr to transport the crushed aggregate out of the quarry for use either onsite or transported offsite

• each aggregate truck would make 2 trips of approximately 276 m

• a silt content of 8.3% was used for the travel completed by aggregate trucks (8.3% is the average for stone quarrying and processing haul roads to and from the pit provided in AP42 Table 13.2.2-1)

• the particle size multiplier for PM30 (k = 4.9 lb/vehicle mile travelled) was used to estimate total particulate matter

• a control factor of 80% was applied to account for control activities such as watering or use of an approved surfactant

E = k * (s/12)a * (W/3)b

= 4.9 * (8.3/12)0.7 * (15/3)0.45

= 7.81 lb/VMT = 7.81 lb/VMT * 454 g/lb * 0.621 mile/km = 2201.7 g/VKT Vehicle kilometres travelled (VKT/hour) = # of trips * distance travelled per trip (km) = (2*55) * 0.276 km = 30.36 VKT/hour


A-10

Assume 80% control of dust emissions, TSP emission rate = 2201.7 g/VKT x 30.36 VKT/hour x 20% = 13369 g/hour x 1 hour/3600 sec = 3.71 g/s A.4.2 Crushing Storage Piles Emissions from storage piles are highest when the storage pile is disturbed and therefore emissions were estimated based on the amount of material transferred per hour. Estimates were prepared using the emission factor for uncontrolled open storage from the Michigan DEQ Mineral Product Processes Fact Sheet. For particulate matter emissions: Material transferred (ton/hour) * Emission factor (lb/ton product stored) * 454 g/lb * 1hour/3600 sec = 495 ton/hour * 0.12 lb/ton * 454 g/lb * 1 hour/3600 sec = 7.49 g/s


APPENDIX B

Sample Output Files for Regulation 346 and AERMOD dispersion modelling runs


B-1

Regulation 346 Dispersion Model Sample Output file (nitrogen oxides)

MAXIMUM GROUND LEVEL CONCENTRATION

VERSION 2.00

Date: February 12, 2010

Application No: CTI Project P3053

Reviewer: UJ

Title: Miller Braeside - NOx

Data from file: nox-1.STK

Point Sources

Number Height Emission Exit Diameter Temp X Y

Rate Velocity

m gm/s m/s m C m m

1 10.7 11.50 45.7 .8 149.0 -764. 168.

2 7.9 .100E-39 55.6 .2 370.0 -766. 179.

Virtual Sources

Number Height Emission Width Length Angle X Y

Rate

m gm/s m m deg m m

3 18.3 .100E-39 4.5 4.5 90.0 -782. 157.

4 4.0 .100E-39 3.0 3.5 -60.0 -672. -86.

5 20.0 .524E-01 15.0 18.0 30.0 -685. -55.

6 15.0 .100E-39 5.0 99.0 43.0 -371. -255.

7 4.0 .198E-01 18.0 78.0 90.0 -771. 170.

Single Source Maximum Ground Level Concentrations

Source Stability Maximum Distance Wind Speed

Conc (ug/m3) (m) (m/sec)

1 C 288.43 219. 7.235

D 347.24 369. 7.735

2 C .13023E-37 152. 2.735

D .16095E-37 259. 2.735

3 C .11915E-36 3. 5.000

D .16912E-36 3. 5.000

4 C .81000E-36 2. 5.000

D .11623E-35 2. 5.000

5 C 17.894 9. 5.000

D 25.059 9. 5.000

6 C .30841E-37 50. 5.000

D .58552E-37 50. 5.000

7 C 15.127 39. 5.000

D 29.652 39. 5.000

All Stacks Tested


B-2

Maximum off-property ground level concentration 349.09 ug/m3

Stability D

Wind direction 255.981 deg

Wind speed 7.735 m/s

Coordinates -853.3 -189.6 (m)

Maximum Concentration along the property line 349.10 ug/m3

Stability D

Wind direction 256.134 deg

Wind speed 7.735 m/s

Coordinates -852. -189. (m)

All Regulation 346 modelling files are available upon request. AERMOD Dispersion Model Sample Output File Input/output files for the runs are provided separately and are available upon request.


APPENDIX C

Dust Management Plan


DUST MANAGEMENT PLAN

MILLER PAVING LIMITED

BRAESIDE QUARRY

Prepared by:

Church & Trought Inc.

885 Don Mills Road, Suite 106

Toronto Ontario

M3C 1V9

June, 2009


TABLE OF CONTENTS

1. INTRODUCTION.................................................................................................................... C-1

2. EMISSION SOURCES............................................................................................................. C-1

3. RECOMMENDED CONTROL MEASURES.........................................................................C-2 3.1 Aggregate Crushing and Screening……........................................................................................C-2

3.2 Unpaved Roads........................................................................................................................…..C-2

3.3 Paved Roads...................................................................................................................................C-2

3.4 Truck Loading................................................................................................................................C-3

3.5 Wind Erosion of Stockpiles and Exposed.....................................................................................C-3

3.6 Dust Collectors..............................................................................................................................C-3

3.7 Storage Piles……………………………......................................................................................C-3

3.8 Vehicle Speed………………………… .....................................................................................C-3

4. IMPLEMENTATION SCHEDULE......................................................................................... C-3

5. IMPLEMENTATION PLAN...................................................................................................C-3

6. INSPECTION AND MAINTENANCE ..................................................................................C-4

7. MONITORING AND RECORD KEEPING............................................................................ C-4

8. RESPONSE TO COMPLAINTS.............................................................................................. C-4

9. CONCLUSION......................................................................................................................... C-5


C-1

1. INTRODUCTION

A Dust Management Plan (DMP) for dust is a detailed document that outlines the fugitive dust

sources at a given site and describes the measures that shall be used to control emissions from these

sources. The DMP is used to manage fugitive dust emissions at facilities such as the Braeside

Quarry, from sources such as on-site haul routes, material processing, material handling, and wind

erosion.

This DMP for the Braeside Quarry includes the following items:

• A description of the emission sources from the facility;

• Details regarding the size and composition of the dust;

• A summary of control measures that are or shall be put in place as part of the DMP;

• An implementation schedule for the control measures;

• An implementation plan for the control measures;

• Details regarding the inspection and maintenance schedule; and,

• A description of the planned monitoring and record keeping activities.

2. EMISSION SOURCES

Operations within the quarry shall consist of the following:

• Site preparation (overburden removal, berm construction, rehabilitation)

• Aggregate Extraction (front-end loader loads at the extraction face, transferring

material directly to the processing plant, with loading of quarry trucks during some

periods of operation).

• Aggregate Processing (screening and/or crushing of aggregate at the processing plant)

• Shipping (front-end loader loads highway trucks for shipment of aggregate off site)

• Hot Mix Asphalt Plant

• Ready Mix Concrete Plant

• The primary potential sources of dust emissions are therefore:

- Aggregate crushing and screening;

- Unpaved roads within the pit;

- Paved roads near the pit entrance;

- Truck loading; and,

- Wind erosion of stockpiles and exposed faces

- Drum Mixer at Hot Mix Asphalt Plant

- Silos at Ready Mix Concrete Plant

Details regarding these key dust sources at the Braeside Quarry are discussed further in the following


C-2

sections.

3. RECOMMENDED CONTROL MEASURES

3.1 Aggregate Crushing and Screening

• The processing plant shall be equipped with a water spray system capable of supplying

up to 1000 litres / hour of water. The actual water application rate shall vary, being

adjusted as needed to reduce visible dust emission.

• Water for the spray system comes from the dewatering pond.

• The spraybars will be triggered whenever the site manager or scale operator observes

visible dust emissions.

3.2 Unpaved Roads

• A water truck and water supply shall be available to cover the unpaved internal haul

routes.

• The truck shall be equipped with a spray bar to deliver the water evenly over the haul

route surface.

• Water supply shall be available to allow the tanker truck to fill and apply the full

payload of water each hour, if necessary during dry conditions.

• The actual watering rate shall vary, depending on surface moisture conditions and traffic

conditions, and shall be triggered whenever the site manager or scale operator observes

trucks producing a trailing cloud of dust greater than about 1/3 of a trailer length.

• Haul routes shall be maintained during May to October, to ensure that loose fine material

on the haul route surface is minimized.

3.3 Paved Roads

• The section of the internal haul route, extending from the public road to the scales on the

site, shall be paved.

• The facility shall have the capability to spray water or use an alternate dust suppressant

on-site paved surfaces, as well as Usborne Street near the quarry entrance as needed.

• The actual rate of flushing shall vary, depending on surface moisture conditions and

traffic levels, and shall be triggered whenever the scale operator or site manager observes

trailers producing a trailing cloud of dust greater than about 1/3 of a trailer length.

• The water truck and water supply shall be available to cover the paved internal haul

routes.

• The actual watering rate shall vary, depending on surface moisture conditions and traffic

conditions, and shall be triggered whenever the site manager or scale operator observes

trucks producing a trailing cloud of dust greater than about 1/3 of a truck length.

• Haul routes shall be maintained during May to October, to ensure that loose fine material

on the haul route surface is minimized.


C-3

3.4 Truck Loading

• Truck loading will be suspended if the site manager or scale operator observes the

material to be dry and dusty and the wind is directed toward a residence at a speed greater

than 30 km/h or otherwise sufficient to cause wide-spread visible emissions.

3.5 Wind Erosion of Exposed Faces

• Extraction shall be suspended if the condition of the quarry face is dry and dusty and the

wind is directed toward a residence at a speed greater than 30 km/h or otherwise

sufficient to cause wide-spread visible erosion of the open face.

• Wind forecasts shall be monitored regularly during this phase of the operation to

anticipate the need for these measures and allow for next day planning.

3.6 Dust Collectors

• The Hot Mix Asphalt Plant drum mixer will be equipped with a baghouse.

• The Ready Mix Concrete Plant’s cement and cement supplement silos will be equipped

with baghouses.

3.7 Storage Piles

• If the site manager observes that the material in any storage piles is dry and dusty, they

will be watered down to minimize any visible emissions.

3.8 Vehicle Speed

• All vehicles entering the site must maintain speeds below 30 km/hr. Signage will be

posted.

4. IMPLEMENTATION SCHEDULE

All control measures are to be in place prior to extraction in the expanded extraction area.

5. IMPLEMENTATION PLAN

The following outlines how the plan shall be implemented, including training of facility personnel:

• The DMP Plan shall be kept on file at scale house.

• Training on new and existing operating procedures shall be provided to relevant new and

existing staff;

• Training shall be provided to relevant new staff and refresher training shall be provided at

a minimum of once every 3 years;

• The company’s management shall communicate the DMP to responsible supervisors,

who shall ensure staff are following operating procedures defined in the DMP;

• The Site Manager shall be responsible for ensuring the DMP is followed;


C-4

• Management shall ensure plan is reviewed annually;

• The staff shall follow the DMP procedures.

6. INSPECTION AND MAINTENANCE

The following outlines the details regarding the inspection and maintenance procedures that shall be

employed at the site:

• The water spray system for the processing plant should be inspected when in use;

• Haul routes are maintained on a regular basis as previously indicated;

7. MONITORING AND RECORD KEEPING

Visual inspection for dusty conditions in areas identified in the DMP shall occur at a minimum of

twice daily during dry weather and once per day otherwise. Records shall be made each time the

following events occur:

• Water truck arrives and applies water to unpaved haul routes;

• Water applied to paved haul routes;

• Unpaved haul routes are maintained;

• Water sprays are used at the processing plant;

• Wet or vacuum-sweeper arrives and cleans paved surfaces;

• Dust emissions are observed; and,

• A complaint is received.

Records will be kept in a log.

8. RESPONSE TO COMPLAINTS

Signs shall be placed outside the Braeside Quarry providing a phone number for neighbours to call if

they have any dust concerns. Miller Paving will request that the local MOE office and the Township

of McNab/Braeside notify them immediately if they receive a complaint, to allow for prompt

company response and follow-up. Complainants are requested to identify the location of the incident

as well as the time of day that it was detected and any other information that they feel is relevant.

All dust complaints shall be forwarded to the Site Manager. This individual shall then ensure the

following steps:

• Conduct a site survey to identify sources of visible dust contributing to the complaint


C-5

• Create a record of this survey

• Determine weather conditions (both current and at the time that the complaint was made) and

report on all on-site activities at the time the complaint was made.

If the information collected from the first two response procedures indicates that Miller Braeside

Quarry is not the source of the dust complaint, the complainant shall be notified of this finding.

Documentation supporting this response mechanism (site survey record and wind station readings at

the time of the complaint) shall be provided to the complainant upon request. The Site Manager or

other Miller staff shall respond to all complaints within 24 hours (phone call to complainant).

If it is determined that the complaint was in fact related to Braeside Quarry’s activities, the following

response procedures shall be followed, in the order provided below:

1. Level 1 - Inspection and correction of operations within quarry. The Site Manager shall ensure

that all elements of the Dust Management Plan are being followed. Control measures shall be

stepped up or operations may be curtailed, as required.

2. Level 2 – Review of Dust Management Plan. If the Level 1 response does not adequately resolve

the source of the dust complaint, the Dust Management Plan shall be reviewed to look for

additional control measures to address the source of the dust complaint.

3. Level 3 – Operational modifications. If the Level 2 response does not adequately resolve the

source of the dust complaint, Braeside Quarry shall commit to making physical changes to the

facility address the source of the dust complaint, such as additional enclosures, relocation of

equipment, or additional paving.

9. CONCLUSION

Miller Paving Limited considers the dust control measures of this Dust Management Plan to either

meet or exceed industry standards for controlling dust at quarry operations. Miller Paving Limited

will implement these measures to successfully control dust emissions at the Braeside Quarry.

miller paving limited braeside quarry expansion · dispersion modelling (esdm) report as part of an...

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