Preliminary Emission Summary and Dispersion Modelling Report for a Hot Mix Asphalt Plant P.B. Paving and Landscaping Plantagenet, Ontario

Preliminary Summary and Dispersion Modelling Report for a Hot Mix Asphalt Plant P.B. Paving and Landscaping Plantagenet, Ontario prepared on behalf of: Levac Robichaud Leclerc Associates Ltd 1-2884 Chamberland Street Rockland, Ontario K4K 1M6 by: P.O. Box 313 Ingleside, Ontario K0C 1M0 March 29, 2012 Stirling Engineering Inc Reference # 10074

Executive Summary This document is a Preliminary Summary and Dispersion Modelling ( ESDM ) Report. This Preliminary ESDM Report has been prepared based on the provisions of Section 26 of Ontario Regulation 419/05 and the Ontario Ministry of the Environment document Procedure for Preparing an Summary and Dispersion Modelling Report, dated March 2009. This Preliminary ESDM Report has been prepared on behalf of Levac Robichaud Leclerc Associates Ltd ( Levac ) for P.B. Paving and Landscaping ( PB Paving ) in support of municipal approvals for a proposed asphalt plant to be located in Plantagenet, Ontario. The plant is expected to operate 12 hours per day, 5 days per week, typically 200 days per year. Operations at the plant will include: receiving storage and handling of raw materials; mixing and heating of raw materials to produce hot mix asphalt at a rate of 250 tonnes per hour; and trucking of hot mix asphalt products The PB Paving facility is subject to Section 19 of Ontario Regulation 419/05. s from the PB Paving asphalt plant may include trace quantities of particulate matter (PM); nitrogen oxides (NO x ); sulphur dioxide (SO 2 ); benzene; formaldehyde; quinine; beryllium; cadmium; and hexavalent chromium. The modelled concentrations of these contaminants at the point of impingement concentrations are below the applicable limits as established under Ontario Regulation 419/05. A noise assessment review has been prepared separately to this report. March 29, 2012 p. i

Table 1.1 Summary Table Contaminant Name Contaminant CAS # Total Facility Rate (g/s) Air Dispersion Model Used Max POI Concentration (µg/m 3 ) Averaging Period (hours) MOE POI Limit (µg/m 3 ) Regulation Schedule # Percentage of MOE Limit (%) PM 0 1.32E+00 RUN308 9.34E+01 0.5 100 2 93.4% NO x 10102-44-0 7.87E-01 RUN308 5.56E+01 0.5 500 2 11.1% SO 2 7446-09-5 1.45E-01 RUN308 1.02E+01 0.5 690 2 1.5% benzene 71-43-2 8.82E-03 RUN308 6.23E-01 0.5 7 2 8.9% formaldehyde 50-00-0 2.33E-02 RUN308 1.65E+00 0.5 65 2 2.5% quinone 106-51-4 8.50E-03 RUN308 6.01E-01 0.5 45 2 1.3% beryllium 7440-41-7 4.72E-06 RUN308 3.34E-04 0.5 0.03 2 1.1% cadmium 7440-43-9 1.92E-05 RUN308 1.36E-03 0.5 0.075 2 1.8% hexavalent chromium 7440-47-3 1.51E-06 RUN308 1.07E-04 0.5 0.002 2 5.3% March 29, 2012 p. ii

Table of Contents 1.0 INTRODUCTION AND BACKGROUND... 1 1.1 Proponent... 1 1.2 Contact for Technical Information Regarding the ESDM Report... 1 1.3 Project Description Summary... 2 1.4 Report Format... 2 1.5 Background of Preliminary Summary Dispersion Modelling Report... 2 2.0 ENVIRONMENTAL COMPLIANCE APPROVAL APPLICATION FORMS... 3 3.0 FACILITY DESCRIPTION... 4 3.1 North American Industry Classification System (NAICS)... 4 3.2 General Process and Operations Description... 4 3.3 Operating Envelope... 5 3.4 Description of Raw Materials and Products... 5 4.0 INITIAL IDENTIFICATION OF SOURCES AND CONTAMINANTS... 6 4.1 General Characterisation of s... 6 4.1.1 Natural Gas Fired Dryer s... 6 4.1.2 Load-Out Operation s... 6 4.1.3 Silo Filling s... 6 4.2 Source and Contaminant Identification... 6 5.0 ASSESSMENT OF THE SIGNIFICANCE OF CONTAMINANTS AND SOURCES... 8 5.1 Insignificant Sources... 8 5.2 Contaminants Emitted in Negligible Amounts... 8 5.3 Contaminants Emitted in Insignificant Quantities... 9 5.3.1 Screened Out VOC s... 9 5.3.2 Screened Out PAH s... 9 5.3.3 Additional Screened Out PAH Compounds... 10 5.3.4 Screened Out Non-Hazardous Air Pollutants... 11 5.3.1 Screened Out Metals... 11 5.4 Significant Contaminants... 12 6.0 OPERATING CONDITIONS, EMISSION ESTIMATING AND DATA QUALITY... 13 6.1 Source No. 1 Natural Gas Fired Dryer... 13 6.1.1 Natural Gas Fired Dryer Operating Conditions... 13 6.1.2 Natural Gas Fired Dryer Rates... 13 6.1.1 Source No. 1 s Data Quality Statement... 13 6.2 Amalgamated Source Summary... 14 7.0 SOURCE SUMMARY TABLE... 15 8.0 NOISE ASSESSMENT... 16 9.0 DISPERSION MODELLING... 17 9.1 Point of Impingement Calculations... 18 9.2 Dispersion Modelling Input and Output Files... 18 10.0 EMISSION SUMMARY TABLE... 19 10.1 Summary and Conclusions... 19 11.0 PROFESSIONAL SEAL... 20 12.0 REFERENCES... 21 12.1 Regulation, Codes and Standards... 21 12.2 Publication and Documents... 21 13.0 APPENDICES... 22 March 29, 2012 p. iii

Appendix A Application and Supporting Documentation (RESERVED-to be included in MOE submission only): Environmental Compliance Approval Application (RESERVED-to be included in MOE submission only): Acoustic Assessment Report for P B Paving, Hugh Williamson Associates Inc, Appendix B ESDM Supporting Documentation Township of Alfred-Plantagenet Zoning Map, showing Lot 18 Concession 2 (3083 Old Highway 17), Plantagenet, Ontario 10074-SK-001 Dispersion Modelling Site Plan 10074-SK-002 Example Process Flow Diagram 10074-SK-003 Nearest Point of Reception Appendix C Dispersion Modelling PBSTACK.doc converted from PBSTACK.stk RUN308 input file PBSTAK2.doc converted RUN308 output file List of Tables Table 1.1 Summary Table... ii Table 4.1 Source and Contaminant Identification Table... 7 Table 5.1 PM from Insignificant Sources Verification... 8 Table 5.2 Contaminants Associated with Natural Gas Combustion Emitted in Negligible Amounts... 8 Table 5.3 AP-42 Table 11.1-9 VOC Contaminants Screened Out Using Section 7.1.2 of the Procedure Document... 9 Table 5.4 AP-42 Table 11.1-9 PAH Contaminants Screened Out Using Section 7.1.2 of the Procedure Document... 10 Table 5.5 Additional AP-42 Table 11.1-9 PAH Contaminants to be Screened Out by Section 7.1.2 of the Procedure Document... 11 Table 5.6 AP-42 Table 11.1-9 non-hap Organic Contaminants Screened Out Using Section 7.1.2 of the Procedure Document... 11 Table 5.5 AP-42 Table 11.11 Trace Metal s Screened Out by Section 7.1.2 of the Procedure Document... 12 Table 5.8 Remaining Significant Contaminants... 12 Table 6.1 Source No. 1 Expected s Rates... 13 Table 7.1 Source Summary Table... 15 Table 9.1 Dispersion Modelling Input Summary Table... 17 March 29, 2012 p. iv

10074-SK-001 Site Plan 10074-SK-002 Example Process Flow Diagram 10074-SK-003 Nearest Point of Reception List of Drawings March 29, 2012 p. v

1.0 INTRODUCTION AND BACKGROUND This document is a Preliminary Summary and Dispersion Modelling ( ESDM ) Report prepared in support of municipal approvals, for a proposed asphalt plant to be operated by P.B. Paving and Landscaping ( PB Paving ). This Preliminary ESDM Report has been prepared by Stirling Engineering Inc ( Stirling Engineering ) on behalf of Levac Robichaud Leclerc Associates Ltd for PB Paving. 1.1 Proponent The mailing address and physical address for PB Paving is: P.B. Paving and Landscaping 111, County Road 19 Wendover, Ontario K0A 3K0 The management contact for PB Paving is: Contact: Mr. Sylvain Fredette Telephone: 613 673-2137 Email: Fredwelding@bellnet.ca The technical contact for the project is: Contact: Mr. Mario Elie Company: Levac Robichaud Leclerc Associates Ltd Telephone: (613) 446-7777 Facsimile: (613) 446-1427 Email: melie@lrl.ca 1.2 Contact for Technical Information Regarding the ESDM Report This ESDM Report has been prepared by: Stirling Engineering Inc P.O. Box 313 Ingleside, Ontario K0C 1M0 The contact for additional technical information regarding this document is: Contact: Mr. Robert S. Wilson, P.Eng Telephone: (613) 362-7847 Facsimile: (613) 537-8523 Email: rwilson@stirlingengineering.ca March 29, 2012 p. 1 of 21

1.3 Project Description Summary PB Paving is an Ontario based contractor engaged in the construction industry. PB Paving is proposing to erect and operate a hot mix asphalt plant at a property in Plantagenet (Township of Alfred-Plantagenet) Ontario. The hot mix asphalt ( HMA ) plant would be used to support road construction and resurfacing projects in Eastern Ontario. 1.4 Report Format This Preliminary ESDM Report has been prepared based on Section 26 of Ontario Regulation 419/05 Air Pollution Local Air Quality ( O. Reg. 419/05 ) and the Environmental Protection Act. The Ontario Ministry of the Environment ( MOE ) document Procedure for Preparing an Summary and Dispersion Modelling Report ( Procedure document ) dated March 2009 was referenced for additional guidance. 1.5 Background of Preliminary Summary Dispersion Modelling Report To assist in the design and layout of the facility, and to obtain the necessary approvals, PB Paving retained Levac Robichaud Leclerc Associates Ltd ( Levac ), an Ontario consulting engineering and project management firm, to provide professional engineering services. Levac subcontracted portions of the environmental approval work to Stirling Engineering. This Preliminary ESDM Report has been prepared by Stirling Engineering in support of municipal approvals for the construction of the HMA plant. The Preliminary ESDM will be converted to a final ESDM and submitted to the Ontario Ministry of the Environment, with additional supporting documentation to obtain an Environmental Compliance Approval prior to operation of the HMA plant. March 29, 2012 p. 2 of 21

2.0 ENVIRONMENTAL COMPLIANCE APPROVAL APPLICATION FORMS This section has been intentionally left blank. This ESDM report has been prepared in advance of municipal approvals and Environmental Compliance Approval Application forms are not required at this phase of the project. March 29, 2012 p. 3 of 21

3.0 FACILITY DESCRIPTION PB Paving is proposing the construction of an HMA plant which is to be located on part of Lot 18, Concession 2, Township of Alfred-Plantagenet (former Township of North Plantagenet) in the United Counties of Prescott Russell. The property is approximately 32.83 ha in area. Based on zoning by-law information provided by the Corporation of the Township of Alfred-Plantagenet, the property is zoned A-1 or Agriculture with exception. A zoning bylaw amendment is required to convert the zoning to use supporting the asphalt plant operation. A copy of the current zoning is attached in Appendix A. The proposed asphalt paving facility and property boundaries are shown in drawings 101085-01 Proposed Asphalt Plant Location Existing Features- General and 101085-02 Proposed Asphalt Plant Location Existing Features, dated November 2011. For the purposes of dispersion modelling, the property boundaries have been set at the property line. 3.1 North American Industry Classification System (NAICS) The PB Paving facility may be given the applicable The North American Industry Classification System (NAICS) Code of 324121 Asphalt Paving Mixture and Block Manufacturing US. This NAICS code is part of the 324 Group, and does not fall under Schedule 4 or 5 of O. Reg. 419/05. 3.2 General Process and Operations Description The U.S. Environmental Protection Agency ( EPA ) document AP-42, Fifth Edition Compilation of Air Pollutant Factors, Volume 1: Stationary Point and Area Sources, Chapter 11 Section 1: Hot Mix Asphalt Plants ( AP-42 ) dated April 2004, was used to prepare this Preliminary ESDM. The specific model of HMA plant to be used at the Plantagenet site has not been determined. PB Paving however has confirmed that they will be constructing and operating a batch type plant. PB Paving has also confirmed that they will be fueling the plant with natural gas. The plant will be equipped with a primary collector for particulate emissions and a secondary collector costing of a filter fabric type dust collector, or an equivalent emission control device. The main activities associated with a batch type asphalt plant operation are: receiving and handling of fine and coarse aggregate, reclaimed asphalt pavement ( RAP ) and liquid asphalt cement (bitumen); aggregate size sorting; drying and mixing of sorted aggregate with recovered particulate matter, RAP and liquid asphalt cement; loading; and, possibly storage. Drawing 10074-SK-002 provides a general process flow diagram for a typical batch plant, based on AP-42. March 29, 2012 p. 4 of 21

3.3 Operating Envelope PB Paving is expected to operate the HMA plant twelve (12) hours per day, five (5) days per week and up to 200 days per year. Using a maximum production rate of 250 tons/hr, an annual asphalt throughput of 5.4x10 8 kg (0.54 MMT) can be estimated for the PB Paving facility. 3.4 Description of Raw Materials and Products The raw material used at the proposed PB Paving facility is fine and coarse aggregate, RAP and liquid asphalt cement. A typical weight distribution of HMA is 92% aggregate and RAP, and 8% liquid asphalt cement and water. March 29, 2012 p. 5 of 21

4.0 INITIAL IDENTIFICATION OF SOURCES AND CONTAMINANTS This section provides an initial identification of the sources and corresponding contaminants emitted from the proposed PB Paving facility. 4.1 General Characterisation of s Contaminant emissions from the asphalt plant operation have been identified through the AP-42 document. The contaminants can be considered in several groups: particulate matter (PM) emissions from the dust collector, transportation and fugitive emissions; products of combustion from the natural gas fired dryer; volatile organic compounds (VOC) from combustion and the heated asphalt; polyaromatic hydrocarbon compounds (PAH) from the heated asphalt semi-volatile and heavy organic compounds from the heated asphalt; and trace metals from the heated asphalt. The PB Paving facility will be a batch plant will have three (3) main sources of contaminant emissions: Source 1, the natural gas fired dryer, is further described in section 4.1.1; Source 2 is the combined fugitive emissions from several load-out locations of the HMA plant, is further described in section 4.1.2; and Source 3, the silo filling process, is further described in section 4.1.3. 4.1.1 Natural Gas Fired Dryer s The most significant source of emissions at the PB Paving facility will be a natural gas fired dryer. Contaminants from the rotary dryer will be directed to a primary collector then to a common dust collector where the contaminants will be filtered, with trace contaminants emitted directly to atmosphere through a stack. 4.1.2 Load-Out Operation s Fugitive load-out emissions will be generated by several activities throughout the HMA plant. These activities will emit particulate material ( PM ) directly to atmosphere. 4.1.3 Silo Filling s A separate point source of PM emissions is the silo filling operation. This activity will also emit PM directly to atmosphere. 4.2 Source and Contaminant Identification The sources of emissions from the PB Paving facility are tabulated in Table 4.1, the Source and Contaminant Identification Table. March 29, 2012 p. 6 of 21

For the purposes of this report, the emissions from the natural gas fired dryer are referred to as Source No. 1, the emissions from the load-out operations are referred to as Source No. 2 and the emissions from the silo filling procedure are referred to as Source No. 3. Table 4.1 Source and Contaminant Identification Table Source Information Source No. Source Description 1 natural gas fired dryer Expected Contaminants PM, NO x, SO 2, benzene, formaldehyde, quinine, beryllium, cadmium, hexavalent chromium 2 load-out operations PM 3 silo filling operations PM March 29, 2012 p. 7 of 21

5.0 ASSESSMENT OF THE SIGNIFICANCE OF CONTAMINANTS AND SOURCES This section provides an assessment of the significance of sources and contaminants emitted from the proposed PB Paving facility. 5.1 Insignificant Sources In accordance with subsection 7.2.2 of the Procedure document, individual sources that emit contaminants at a rate less than 5% of total property-wide emissions of a contaminant can be considered insignificant sources. PM is the only common contaminant to be emitted from multiple sources. PM emissions from the natural gas fired dryer, load-out and silo filling procedures are estimated in the following table, based on the AP-42 document. Table 5.1 PM from Insignificant Sources Verification Source No. Rate (g/s) Percent of Total s (%) 1 1.33 97 2 0.018 1.5 3 0.020 1.5 Total: 1.37 100 As shown in Table 5.1, PM emissions from Sources No. 2 and 3 can be considered insignificant, as these sources are expected to emit below the 5% property-wide emission threshold for PM. 5.2 Contaminants Emitted in Negligible Amounts None of the identified emission sources are listed in Appendix B.2 of the Procedure document and therefore the contaminants from the specified sources cannot be categorized as emitted in negligible amounts. Several of the contaminants identified in the AP-42 document are associated exclusively with the combustion of natural gas for the dryer. As stated in Section 7.1.1 of the Procedure document the only significant contaminant from the combustion of natural gas is NOx. Since the asphalt plant will have only moderately sized heaters, the combustion contaminants listed in Table 5.2 have been further excluded from the ESDM. Table 5.2 Contaminants Associated with Natural Gas Combustion Emitted in Negligible Amounts Source No. Contaminant AP-42 Reference Table CAS # 1 methane 11.1-6 74-82-8 1 carbon monoxide 11.1-5 630-08-0 1 carbon dioxide 11.1-5 124-38-9 1 sulphur dioxide 11.1-5 7446-09-5 March 29, 2012 p. 8 of 21

Additionally the AP-42 document identifies total organic carbon and volatile organic carbon as general, non-speciated emissions. This ESDM addresses only the individual speciated emissions. 5.3 Contaminants Emitted in Insignificant Quantities Contaminants emitted in insignificant quantities can be identified by developing emission thresholds. Contaminants emitted at a rate below the threshold may be considered negligible in accordance with the following equation used to calculate the emission threshold from subsection 7.1.2 of the Procedure document: The Dispersion Factor is selected from Appendix B.1, Table B-1 of the Procedure document based on the distance from the emission source to the closest Point of Reception ( POR ). The distance from the point source of the main asphalt plant stack to the nearest POR is approximately 45 metres. Using Table B-1 of the Procedure document, a more conservative distance from the main plant point source of 40 metres was used to obtain a rural dispersion factor of 8,100 µg/m 3 per g/s emission. 5.3.1 Screened Out VOC s Several of the speciated VOC compound identified in Table 11.1-9 of the AP-42 document can be screened out using the Threshold procedure specified in subsection 7.1.2 of the Procedure Document. The screened out VOCs are listed in Table 5.3. Table 5.3 AP-42 Table 11.1-9 VOC Contaminants Screened Out Using Section 7.1.2 of the Procedure Document Contaminant CAS # Factor (lb/ton of HMA produced) Threshold (g/s) Rate (g/s) Factor Rating acetaldehyde 75-07-0 0.00032 0.030864 0.01008 E ethylbenzene 100-41-4 0.0022 0.086419 0.06929 D toluene 108-88-3 0.001 0.123456 0.03150 D xylene 1330-20-7 0.0027 0.135802 0.08504 D 5.3.2 Screened Out PAH s Similarly, Table 11.1-9 identifies several PAH compounds that can be screened out using the Threshold. The screened out PAH compounds are listed in Table 5.4 Of the PAH compounds listed in Table 11.1-9 of AP-42 with a corresponding MOE published POI limit, only 2-methylnaphthalene (CAS 91-57-6) was emitted at a rate above the threshold. The calculated Point of Impingement ( POI ) concentration for 2-methylnaphthalene however is less than 1 % of the allowable published limit, even though it is the PAH emitted in the greatest amount. March 29, 2012 p. 9 of 21

Also noteworthy is that benzo(a)pyrene, the PAH with the lowest allowable POI of 0.0033 micrograms per cubic meter (3.3 nanograms per cubic meter) was screened out using Section 7.1.2. Table 5.4 AP-42 Table 11.1-9 PAH Contaminants Screened Out Using Section 7.1.2 of the Procedure Document Contaminant CAS # Factor (lb/ton of HMA produced) Threshold (g/s) Rate (g/s) Factor Rating acenaphthene 83-32-9 9.0E-07 6.1E-05 2.8E-05 D acenephtyelene 208-96-8 5.8E-07 6.4E-04 1.8E-05 D benzo(a)pyrene 50-32-8 3.1E-10 2.0E-07 9.7E-09 E naphthalene 91-20-3 3.6E-05 2.2E-03 1.3E-03 D 5.3.3 Additional Screened Out PAH Compounds The remaining PAH compounds identified in Table 11.1-9 of AP-42 do not have published POI limits. If a POI limit of 1.0 micrograms per cubic meter (the next lowest published POI to benzo(a)pyrene), all but phenanthrene (CAS 85-01-8) could be screened out using the Thresholds. Even using a POI of 0.0033 micrograms per cubic meter, all listed PAH compounds not screened out would still have a modelled POI concentration below 0.0033 micrograms per cubic meter, except fluorene (CAS 86-73-7) which would be slightly above at 0.0036 micrograms per cubic meter. Based on the above evaluation, all other PAH compounds identified in Table 11.1-9 of AP-42 can also be screened out. The additional PAH compounds to be screened out are listed in Table 5.5, with a conservative POI limit of 1 microgram per cubic meter used as the screening POI, except 2-methylnaphthalene (CAS 91-57-6) which has a published POI of 30 micrograms per cubic meter. March 29, 2012 p. 10 of 21

Table 5.5 Additional AP-42 Table 11.1-9 PAH Contaminants to be Screened Out by Section 7.1.2 of the Procedure Document Contaminant CAS # Factor (lb/ton of HMA produced) Threshold (g/s) based on 1 µg/m3 POI Rate (g/s) Factor Rating 2-methylnaphthalene 91-57-6 7.10E-05 1.85E-03 2.24E-03 D anthracene 120-12-7 2.10E-07 6.17E-05 6.61E-06 D benzo(a)anthracene 56-53-3 4.60E-09 6.17E-05 1.45E-07 E benzo(b)fluoranthene 205-99-2 9.40E-09 6.17E-05 2.96E-07 D benzo(h,g,i)perylene 191-24-2 5.00E-10 6.17E-05 1.57E-08 E benzo(k)fluoranthene 207-08-9 1.30E-08 6.17E-05 4.09E-07 E chrysene 218-01-9 3.80E-09 6.17E-05 1.20E-07 E dibenz(a,h)anthracene 63-70-3 9.50E-11 6.17E-05 2.99E-09 E fluoranthene 206-44-0 1.60E-07 6.17E-05 5.04E-06 D fluorene 86-73-7 1.60E-06 6.17E-05 5.04E-05 D indeno(1,2,3-ed)pyrene 193-39-5 3.00E-10 6.17E-05 9.45E-09 E phenanthrene 85-01-8 2.60E-06 6.17E-05 8.19E-05 D pyrene 129-00-0 6.20E-08 6.17E-05 1.95E-06 D 5.3.4 Screened Out Non-Hazardous Air Pollutants Table 11.1-9 of AP-42 identifies only four non-hazardous air pollutants (non-hap) organic compounds emitted from batch asphalt plants. Although these four non-hap organic compounds do not have published POI limits, they can also be reasonably screened out as non-hazardous emissions, using a conservative POI limit 1 microgram per cubic meter. The non-haps that can also be screened out are listed in Table 5.6. Table 5.6 AP-42 Table 11.1-9 non-hap Organic Contaminants Screened Out Using Section 7.1.2 of the Procedure Document Contaminant CAS # Factor (lb/ton of HMA produced) Threshold (g/s) Rate (g/s) Factor Rating benzaldehyde 100-52-7 1.30E-04 6.17E-05 4.09E-03 E butraldehude/ 78-84-2 3.00E-05 6.17E-05 9.45E-04 E isobutraldehyde crotonaldehyde 4170-30-3 2.90E-05 6.17E-05 9.13E-04 E hexanal 66-25-6 2.40E-05 6.17E-05 7.56E-04 E 5.3.1 Screened Out Metals The last group of contaminants to be considered are the trace metal emissions from the asphalt plant. All of the metals identified in Table 11.1-11 of AP-42 can be screened out using Thresholds from section 7.1.2 of the Procedure document except beryllium (CAS 7440-41-7), cadmium (CAS 7440-43-9), and hexavalent chromium (CAS 740-47-3). The metals that can be screened out are listed in March 29, 2012 p. 11 of 21

Table 5.7 AP-42 Table 11.11 Trace Metal s Screened Out by Section 7.1.2 of the Procedure Document Contaminant CAS # Factor (lb/ton of HMA produced) Threshold (g/s) based on 1 µg/m3 POI Rate (g/s) Factor Rating arsenic 7440-38-2 4.60E-07 6.17E-05 1.45E-05 D barium 7440-39-3 1.50E-06 1.85E-03 4.72E-05 E chromium 7440-47-3 5.70E-07 3.09E-04 1.80E-05 D copper 7440-50-8 2.80E-06 6.17E-03 8.82E-05 D lead 7439-92-1 8.90E-07 9.26E-05 2.80E-05 D manganese 7439-96-5 6.90E-06 4.63E-04 2.17E-04 D mercury 7440-97-6 4.10E-07 1.23E-04 1.29E-05 E nickel 7440-02-0 3.00E-06 3.09E-04 9.45E-05 D selenium 7482-49-2 4.90E-07 1.23E-03 1.54E-05 E zinc 7440-66-6 6.80E-06 6.17E-03 2.14E-04 D 5.4 Significant Contaminants The remaining contaminants that are emitted in significant quantities are listed in Table 5.8. Table 5.8 Remaining Significant Contaminants Source No. Contaminant CAS # MOE POI Limit (µg/m 3 ) 1 PM 0 100 1 NOx 10102-44-0 500 1 SOx 7446-09-5 690 1 benzene 71-43-2 7 1 formaldehyde 50-00-0 65 1 quinone 106-51-4 45 1 beryllium 7440-41-7 0.03 1 cadmium 7440-43-9 0.075 1 hexavalent chromium 7440-47-3 0.002 March 29, 2012 p. 12 of 21

6.0 OPERATING CONDITIONS, EMISSION ESTIMATING AND DATA QUALITY This section provides a description of the operating conditions used in the calculation of the emission estimates. The emissions estimates for contaminants determined to be insignificant in Section 5.0 have been included to demonstrate the estimating technique used. 6.1 Source No. 1 Natural Gas Fired Dryer An exhaust fan is attached to the proposed secondary collector used in the hot mix asphalt paving process at the PB Paving facility. The contaminants generated by the secondary collector are captured by a bag house. 6.1.1 Natural Gas Fired Dryer Operating Conditions Contaminant emissions were modelled as exhausting continuously over a half hour period from the asphalt plant operating at a peak throughput rate of 250 tons per hour. 6.1.2 Natural Gas Fired Dryer Rates Dryer emissions rates for Source No. 1 contaminants are summarized in Table 6.1. Table 6.1 Source No. 1 Expected s Rates Contaminant AP-42 Referen ce Table Factor (lb/ton of HMA produced) Rate (g/s) Factor Rating PM 11.1-1 0.042 1.32E+00 B NO x 11.1-5 0.025 7.87E-01 D SO x 11.1-9 0.0046 1.45E-01 E benzene 11.1-9 0.00028 8.82E-03 D formaldehyde 11.1-9 0.00074 2.33E-02 D quinone 11.1-9 0.00027 8.50E-03 E beryllium 11.1-11 1.50E-07 4.72E-06 E cadmium 11.1-11 6.10E-07 1.92E-05 D hexavalent chromium 11.1-11 4.80E-08 1.51E-06 E 6.1.1 Source No. 1 s Data Quality Statement Based on subsection 8.3.2 of the Procedure document, the data quality for the benzene, formaldehyde and PM emissions can be considered above-average data quality as the emission rate estimates that are developed from tests on a moderate to large number of sources where the source category population is sufficiently specific to minimize variability. Based on subsection 8.3.3 of the Procedure document, the data quality for the nitrogen oxide emissions can be considered average data quality as the emission rate estimates that are March 29, 2012 p. 13 of 21

developed from tests on a reasonable number of facilities where the source category population is sufficiently specific to minimize variability. Based on subsection 8.3.4 of the Procedure document, the data quality for berylium, cadmium, and hexavalent chromium, emissions can be considered marginal or uncertain data quality as the emission rate estimates that are developed from tests on a reasonable number of facilities where the source category population is sufficiently specific to minimize variability. 6.2 Amalgamated Source Summary For a HMA maximum production rate of 250 ton/hr, the estimated emissions of significant contaminants have been included in Table 7.1. March 29, 2012 p. 14 of 21

7.0 SOURCE SUMMARY TABLE s of sources with significant contaminants are summarized in Table 7.1, the Source Summary Table. Table 7.1 Source Summary Table Source No. 1 Source Description Natural Gas Fired Dryer Stack No. Stack Volumetric Flow Rate [m 3 /s] 1 5.0 (est) Source Data Stack Inner Diameter [m] 0.5 (est) Stack Height Above Grade [m] 20.0 Stack Height Above Roof [m] 0.0 Contaminant CAS # Maximum Rate [g/s] Data Averaging Period [hrs] PM 0 1.32E+00 0.5 NOx 10102-44-0 7.87E-01 0.5 SO2 7446-09-5 1.45E-01 0.5 benzene 71-43-2 8.82E-03 0.5 formaldehyde 50-00-0 2.33E-02 0.5 quinone 106-51-4 8.50E-03 0.5 beryllium 7440-41-7 4.72E-06 0.5 cadmium 7440-43-9 1.92E-05 0.5 hexavalent chromium 7440-47-3 1.51E-06 0.5 Estimating Technique emission factor emission factor emission factor emission factor emission factor emission factor emission factor emission factor emission factor Data Quality B Percentage of Overall s [%] 93.4% D 11.1% E 1.5% D 8.9% D 2.5% E 1.3% E 1.1% D 1.8% E 5.3% March 29, 2012 p. 15 of 19

8.0 NOISE ASSESSMENT A noise assessment report is being submitted separately. March 29, 2012 p. 16 of 21

9.0 DISPERSION MODELLING s from the property were modeled using MOE RUN308 modelling software. The property was modeled as an irregular shaped polygon, based on Drawing 10074-SK-001 Site Plan. Modelling was completed for a generic 1 g/s emission from a point source. A description of the application of an approved dispersion model is tabulated in Table 9.1 below. Table 9.1 Dispersion Modelling Input Summary Table Relevant Section of the Regulation Section Title Summary of How the Approved Dispersion Modelling was Used 8 Negligible Sources of Contaminant See ESDM Section 5.1 9 Same Structure Contamination n/a 10 Operating Conditions See ESDM Section 3.3 11 12 13 Source of Contaminant Rates Combined Effect of Assumptions for Operating Conditions and Rates Meteorological Conditions See ESDM Section 6 as per RUN 308 as per RUN 308 14 15 Area of Modelling Coverage(receptor locations) Stack Height for Certain New Sources of Contaminant n/a 14 m 16 Terrain Data as per RUN 308 17 Averaging Periods Half hour averaging periods were used as required for use with RUN308. March 29, 2012 p. 17 of 21

9.1 Point of Impingement Calculations The ESDM will be submitted in accordance with Section 19 of O. Reg. 419/05. Modelling for the ESDM has been completed using the RUN308 modelling software as specified in the Appendix to Regulation 346. The contaminant emissions from the proposed PB Paving facility have been modeled as emissions from a point source, based on an extended stack height of 20 m above grade, which is more than two (2) times the height of the proposed noise attenuation barrier. The stack will be located approximately 45 m from the west property boundary. The generic 1 g/s emission from the point source resulted in a maximum ground level POI concentration of 70.616 µg/m 3 at the property line. Maximum POI concentrations for all significant contaminants were calculated by multiplying the generic 1 g/s maximum POI concentration by the ratio of the actual contaminant emission rate relative to the generic 1 g/s emission rate. 9.2 Dispersion Modelling Input and Output Files A copy of the model input data for the file PBPOIN20.stk, converted to PBPOIN20.doc is provided in Appendix C. The RUN308 output file for the maximum ground level concentration, converted to file PBMAXGLC.doc is also provided in Appendix C. March 29, 2012 p. 18 of 21

10.0 EMISSION SUMMARY TABLE The POI concentration of all significant expected contaminants calculated in subsection 9.1 has been summarized in Table 1.1, the Summary Table. The calculated POI concentrations were compared against the criteria listed in the MOE document Summary of Standards and Guidelines to Support Ontario Regulation 419: Air Pollution Local Air Quality ( Guideline ). All expected contaminant emissions in the Summary Table are below their respective limits. Particulate matter is expected to have the highest POI concentration, relative to the MOE criteria listed in the Guideline, at 93 %. 10.1 Summary and Conclusions There are expected to be nine (9) contaminants with significant emissions from the processes at the PB Paving facility. The nine significant contaminants are: PM; NO x ; SO 2 ; benzene; formaldehyde; quinine; beryllium; cadmium; and hexavalent chromium These contaminants will be emitted from Source No. 1, the natural gas fired dryer. The contaminants emitted from the PB Paving facility are in compliance with the corresponding standards published in O. Reg. 419/05, based on the emission estimates and dispersion modelling. March 29, 2012 p. 19 of 21

12.0 REFERENCES 12.1 Regulation, Codes and Standards Environmental Protection Act Ontario Regulation 419/05 Air Pollution-Local Air Quality 12.2 Publication and Documents Ontario s Ambient Air Quality Criteria, Standards Development Branch, Ontario Ministry of the Environment, February 2008 Jurisdictional Screening Level (JSL) List Procedure for Preparing an Summary and Dispersion Modelling Report, Ontario Ministry of the Environment, March 2009 AP-42, Fifth Edition Compilation of Air Pollutant Factors, Volume 1: Stationary Point and Area Sources, Chapter 11 Section 1: Hot Mix Asphalt Plants, U.S. Environmental Protection Agency, April 2004 Drawing 101085-01 Proposed Asphalt Plant Location Existing Features- General, Levac Robichaud Leclerc Associates Ltd, November 2011 Drawing 101085-02 Proposed Asphalt Plant Location Existing Features, Levac Robichaud Leclerc Associates Ltd March 29, 2012 p. 21 of 21

13.0 APPENDICES March 29, 2012 p. 22 of 21

Appendix A ESDM Supporting Documentation (RESERVED-to be included in MOE submission only): Environmental Compliance Approval Application (RESERVED-to be included in MOE submission only): Acoustic Assessment Report for P B Paving, Hugh Williamson Associates Inc, March 29, 2012

Appendix B ESDM Supporting Documentation 10074-SK-001 Site Plan 10074-SK-002 Example Process Flow Diagram 10074-SK-003 Nearest Point of Reception Township of Alfred-Plantagenet Zoning By-Law for PB Paving Site March 29, 2012

(0, 385) (840, 385) (820, 310) (985,270) stack (500,70) 45 m (720, 50) County Road 17 (770,50) (0, 0) (165,0) berm PRELIMINARY EMISSION SUMMARY AND DISPERSION MODELING REPORT FOR P.B. PAVING AND LANDSCAPING FACILITY, PLANTAGENET, ONTARIO DISPERSION MODELLING SITE PLAN 10074 1 AAH 1 1 MAR 29, 2012 NTS 10074-SK-001

Note: A reproduction of Figure 11.1-1. General process flow diagram for batch drum mix asphalt plants (source classification codes in parentheses), taken from The U.S. Environmental Protection Agency document AP 42, Fifth Edition Compilation of Air Pollutant Factors, Volume 1: Stationary Point and Area Sources, Chapter 11 Section 1: Hot Mix Asphalt Plants dated April 2004. PRELMINARY EMISSION SUMMARY AND DISPERSION MODELING REPORT FOR P.B. PAVING AND LANDSCAPING FACILITY, PLANTAGENET, ONTARIO 10074 MAR 29, 2012 1 NTS TYPICAL HOT MIX ASPHALT PLANT PROCESS FLOW DIAGRAM AAH 10074-SK-002 1 1

Maximum ground level concentration 460 m County Road 17 PRELIMINARY EMISSION SUMMARY AND DISPERSION MODELING REPORT FOR P.B. PAVING AND LANDSCAPING FACILITY, PLANTAGENET, ONTARIO MAXIMUM GROUND LEVEL CONCENTRATION COUNTOUR 10074 2 AAH 1 1 MAR 29, 2012 NTS 10074-SK-003

Appendix C Dispersion Modelling PBSTACK.doc converted from PBSTACK.stk RUN308 input file PBSTAK2.doc converted RUN308 output file March 29, 2012

This is the updated property description for the PB Paving facility in Plantag Property line co-ordinates # 1=( 0. 0.) # 2=( 165. 0.) # 3=( 720. 50.) # 4=( 770. 50.) # 5=( 985. 270.) # 6=( 820. 310.) # 7=( 840. 385.) # 8=( 0. 385.) # 9=( 0. 0.) #10=( 0. 0.) #11=( 0. 0.) Point Sources y m Number Height Exit Diameter Temp x Rate Velocity m gm/s m/s m C m 1 20.0 1.00 10.0.5 300.0 500. 70. This is the point source for the PB Paving stack.

MAXIMUM GROUND LEVEL CONCENTRATION VERSION 2.00 Date: March 28, 2012 Application No: 10074 Reviewer: RSW Title: RSW This is the maxglc for a 1 g/s emission from the main asphalt plant source at P B Paving. Data from file: pbstack.stk Point Sources Y m Number Height Exit Diameter Temp X Rate Velocity m gm/s m/s m C m 70. 1 20.0 1.00 10.0.5 300.0 500. Single Source Maximum Ground Level Concentrations Source Stability Maximum Distance Wind Speed Conc (ug/m3) (m) (m/sec) 1 C 59.496 260. 2.235 D 70.616 459. 2.235 Maximum off-property ground level concentration 70.616 ug/m3 Stability D Wind direction 247.760 deg Wind speed 2.235 m/s Coordinates 326.2-354.9 (m) Maximum Concentration along the property line 70.616 ug/m3 Stability D Wind direction 188.769 deg Wind speed 2.235 m/s Coordinates 46. 0. (m)