DUFFERIN AGGREGATES ACTON QUARRY EXTENSION PROJECT

Transcription

1 DUFFERIN AGGREGATES ACTON QUARRY EXTENSION PROJECT Noise Impact Study Project#: Prepared By: Steven Titus, B.A.Sc. P.Eng. Bob Rimrott, M.A.Sc, P.Eng AERCOUSTICS ENGINEERING LIMITED 50 Ronson Drive Suite 165 Toronto, Ontario M9W 1B3 November, 2008

2 TABLE OF CONTENTS 1.0 EXECUTIVE SUMMARY INTRODUCTION ACTON QUARRY EXTENSION OVERVIEW OF STUDY OVERVIEW OF THE PROPOSED ACTON QUARRY EXTENSION PROPOSED QUARRY OPERATION HOURS OF OPERATION SITE PREPARATION DRILLING & EXTRACTION AGGREGATE PROCESSING SHIPPING POINTS OF RECEPTION RECEPTOR LIST AND DESCRIPTION NOISE CRITERIA ACOUSTIC ENVIRONMENT TH LINE ROAD TRAFFIC NOISE PREDICTIONS SOUND LEVEL LIMITS CALCULATION PROCEDURE & PARAMETERS NOISE MODEL GROUND ABSORPTION FOILIAGE NOISE SOURCES RECOMMENDED NOISE CONTROLS GENERAL PHASE PHASE 5E PHASE 5W PHASE 6W PHASE 6E SOUTH EXTRACTION PHASE 7 NOISE CONTROLS PREDICTED NOISE LEVELS WITH CONTROLS NOISE FROM OTHER OPERATIONS CONCLUSION...31

3 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE EXECUTIVE SUMMARY Aercoustics has conducted a noise impact study for the proposed Dufferin Aggregates Acton Quarry Extension Project. The purpose of this study was to provide noise control recommendations in order that the operation of the proposed extension will satisfy the Ministry of the Environment (MOE) noise guidelines. The first step in the process was to identify the residential receptors in the vicinity. Receptors in the vicinity of the existing quarry and receptors along Highway 25 or 4 th line have been designated as having an MOE Acoustical Class 2 (Urban) designation, as the background noise at these receptors has an acoustic environment that has been defined by man made noise for many decades. A Class 2 (Urban) acoustic environment has its background noise dominated by man made sound during the daytime period. The sound level limits for receptors in a Class 2 designation are 50 dba for the daytime period (07:00 19:00) and 45 dba for the early morning, evening and night-time periods (19:00 07:00). The remaining receptors are all located to the south of the proposed extension lands and have been designated as Class 3 (Rural) receptors. The MOE sound level limits for these receptors is 45 dba for the daytime period of 07:00-19:00 and 40 dba for the early morning, evening and night-time period of 19:00-07:00. Based on the description of the proposed quarry operation provided by Dufferin Aggregates, noise impact predictions were performed. The operations in the noise impact evaluation included drilling, extraction, transportation and processing. An iterative process of predicting noise impact was performed modeling various noise controls based on discussions with Dufferin Aggregates team to obtain effective and practical controls. The resulting noise controls are presented in this noise impact study. They include extraction directions to utilize the shielding provided by the working face, perimeter berm/barriers, berm/barriers close to equipment, operation time and distance setback restrictions, and other controls. With their implementation, the MOE sound level limits are predicted to be satisfied.

4 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE INTRODUCTION Dufferin Aggregates, a business unit of St. Lawrence Cement Inc., is applying to expand its Acton Quarry, in the Town of Halton Hills, Regional Municipality of Halton. The proposed extension is located to the north and south of the existing operation. 2.1 ACTON QUARRY EXTENSION The Acton Quarry Extension is located in Part of Lots 19, 20, 21, 22, and 24 Concession 3 and Part of Lots 20, 21 and 22, Concession 4, Town of Halton Hills, Regional Municipality of Halton. The total proposed licence area is ha (307.4 ac) and the total proposed extraction area is 99 ha (244.6 ac). The required land use applications include: AGGREGATE RESOURCES ACT A Class A License, Category 2 Quarry Below Water NIAGARA ESCARPMENT PLANNING & DEVELOPMENT ACT An amendment to the Niagara Escarpment Plan (2005) for lands within the Niagara Escarpment Plan boundary. Niagara Escarpment Development Permit for lands within the Niagara Escarpment Development Control Area PLANNING ACT An amendment to The Regional Plan, Regional Municipality of Halton (2006). An amendment to the Town of Halton Hills Official Plan (2008). A Town of Halton Hills Zoning By-law Amendment for the lands outside of the Niagara Escarpment Development Control Area. 2.2 OVERVIEW OF STUDY This noise impact study addresses the environmental noise issues relating to the Dufferin Aggregates Acton Quarry Extension (Extension Lands) described above. The purpose of the study is to aid in the design of the Extension Lands project with the objective of satisfying the Ontario Ministry of the Environment (MOE) sound level limits, and assuring that the predicted noise impacts of the proposed operation are acceptable. To this end, noise receptors in the vicinity of the subject project were identified and appropriate sound level limits established, based on the noise guidelines of the Ministry of the Environment (MOE). Next the noise predictions of the quarry operations were performed at these residential receptors. Where the predicted levels were found to exceed the MOE sound level limits, noise control measures were recommended to satisfy these limits. This study was based on information from the drawings prepared by MacNaughton Hermsen Britton Clarkson Planning Limited (MHBC), and information supplied by Dufferin Aggregates and several site visits.

5 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 5 The general site location is presented as Figure 1. Figures 2 and 4 show site plans illustrating the existing quarry and the proposed extension lands and the identified residential receptor groups. 2.3 OVERVIEW OF THE PROPOSED ACTON QUARRY EXTENSION Dufferin has assembled ha (745 ac) generally north and south of its existing Acton Quarry. The Acton Quarry Extension is located in Part of Lots 19, 20, 21, 22, and 24 Concession 3 and Part of Lots 20, 21 and 22, Concession 4, Town of Halton Hills, Regional Municipality of Halton. The total proposed licence area is ha (307.4 ac) and the total proposed extraction area is 99 ha (244.6 ac). The remaining two-thirds of Dufferin s lands will be maintained and protected for conservation uses. Activities in these areas will be limited to monitoring, environmental mitigation and ecological enhancement. The proposed extension will operate as a continuation to the existing quarry. The proposed quarry will not result in an increase in permitted production levels. Dufferin is applying for a tonnage limit of 4 million tonnes per annum, which is the same as the existing quarry. Site preparation and extraction in Phase 4 will commence when Phase 3 of the existing quarry is nearing completion. There will be no processing in Phase 4. Blasted aggregate will be transported by quarry trucks to the existing processing plant. Shipping to market will be status quo as it will utilize the existing entrance / exit and established haul routes. Phase 5 is a continuation of the existing quarry from Phase 2 and 3. Phase 6 is a continuation of Phase 5. Blasted aggregate from Phases 5 and 6 will be predominately transported by quarry trucks to the existing processing plant using the same internal routes in place for Phase 2 and 3 of the existing operations. Shipping to market will be status quo as it will utilize the existing entrance / exit and established haul routes. Phase 6 east of 3rd Line is located south of the pillar. A sinking cut/access ramp will be required. Phase 6 west is a continuation of Phase 5 west and no sinking cut is required. Blasted aggregate will be predominately transported by quarry truck to the existing processing plant. Phase 6 east quarry trucks will travel up and over the rock pillar, north through Phase 2 to the at-grade crossing at 22nd Side road and through Phase 1 to the processing area. A portable processing plant is also permitted in Phase 5 and 6. If processing occurs in these phases material will be shipped directly from the phase and the shipment trucks will travel north on 3 rd Line and utilize the existing established haul routes. Phase 7 is the southernmost cell and a sinking cut/access ramp is required. Phase 7 includes a portable processing plant and shipping will occur directly from this Phase. Due to its size and configuration Phase 7 can only produce and ship approximately 1 million tonnes annually. Concurrent extraction of any two Phases is permitted to occur to allow for efficient operations and maximize progressive rehabilitation of the site. 3.0 PROPOSED QUARRY OPERATION The following presents descriptions of the normal general operation of the quarry that was used in the noise impact predictions. For the purposes of the noise impact study, the operation is broken down into four parts; site preparation, drilling & extraction, aggregate processing and shipping. 3.1 HOURS OF OPERATION The hours of operation of the quarry are presented below.

6 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE DRILLING & EXTRACTION Drilling: Monday to Friday: 07:00 19:00 Saturday: 07:00 19:00 Sunday: No operation Extraction: Monday to Friday: 05:45 23:30 Saturday: 05:45 23:30 Sunday: No operation AGGREGATE PROCESSING Main Processing Plant: Monday to Friday: 05:45 23:30 Saturday: 05:45 23:30 Sunday: No operation Portable Processing Plant: Monday to Friday: 07:00 19:00 Saturday: 07:00 19:00 Sunday: No operation There is one additional operational restriction of the main processing plant. There shall be no concurrent operation of the main aggregate processing plant and the shipment activity prior to 07:00 and after 19: SHIPPING The following lists the hours of operation of the shipment activity. Trucks travelling on 4 th Line: Monday to Friday: 06:00 17:00 Saturday: 06:00 12:00 Sunday: No operation Trucks travelling on Regional Road No. 25: Monday to Friday: 06:00 19:00 Saturday: 06:00 14:00 Sunday: No operation Occasional projects with the Ontario Ministry of Transportation (MTO) will have extended shipment hours as follows: Trucks travelling on 4 th Line: Monday to Friday: 06:00 17:00 Saturday: 06:00 12:00 Sunday: No operation Trucks travelling on Regional Road No. 25: 24 / 7 operation

7 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE SITE PREPARATION Site Preparation activities are considered to be construction activities and are not included as part of this noise study. Construction activities are exempt from the noise impact study, however, the MOE has provided guidelines for noise emissions which the construction equipment should satisfy. The equipment used for this activity is required to satisfy the noise emission requirements of MOE NPC-115 Noise due to Construction Equipment. For the purposes of this noise impact study, site preparation and construction activities include the construction of the perimeter berms/barriers, overburden stripping, initial sinking cuts, rehabilitation, as well as other construction projects that satisfy the following parameters; - It is not part of the daily normal operation of the pit - It is of short duration - It is only an occasional occurrence 3.3 DRILLING & EXTRACTION Extraction will occur in up to two lifts in each of the quarry extension phases. The drill will operate on top of the working face after the overburden is removed. Two front end loaders will operate at the base of the working face and load quarry trucks. These quarry trucks will generally transport the aggregate material to the main processing plant located in the existing quarry for processing and shipment off property. A portable processing plant may operate in phases 5, 6 or 7. When this occurs the aggregate material will be transported from the working face to this plant, rather than transporting the material to the main quarry. The extraction loaders and/or quarry trucks will be used for the aggregate product transport. The drilling, extraction and transport equipment of the Quarry Extension is understood to be as follows: 1 Rock drill 2 Extraction loaders operating at the working face Quarry trucks (max 20 trips/hr (40 passes/hr)) o 100T trucks for transport to the Main Processing Plant o 60T trucks for transportation to the Portable Processing Plant The drilling operation will not operate during the night-time hours, but the transport of material back to the processing plant will continue to occur.

8 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE AGGREGATE PROCESSING MAIN PROCESSING PLANT Most of the aggregate processing will be conducted by the main processing plant of the existing quarry. It is located both within and outside the existing licensed quarry area. The main processing area includes the lower plant area incorporating the main processing plant equipment located in the unlicensed area of the quarry as well as the upper plant area incorporating the primary crusher and re-crush plant located in a portion of the licensed area identified as the Phase 1 lands. Refer to Figure 2 for the locations of the processing plant and Phase 1 areas. The quarry trucks from the extension lands will transport aggregate material to the existing primary processing plant. This primary processing plant consists of a sub-grade primary crusher. Quarry trucks deliver and dump stone product into the crusher. The crushed product is transported via conveyor belt to additional processing stages in the upper and lower plant areas. Transport of aggregate between processing plant components is with conveyor belts. The processed aggregate is stored in stockpiles. The capacity of the processing plant will remain unchanged from current capacity. An Acoustic Assessment Report was issued on March 6, 2008, to support a Certificate of Approval Application for the main processing plant to operate during the daytime period of 07:00 19:00. This report was filed with noise control recommendations to ensure that the Ministry of Environment daytime sound level limits are satisfied. With the extension lands project, the quarry and aggregate processing operations are proposed to operate beyond the 07:00 19:00 time period. For this additional noise controls are required on certain sources to satisfy the night-time operation of the plant. Refer to Appendix A for additional detail of the main processing plant presenting the source listings, their emission levels and recommended controls. It should be noted that these additional noise controls are not required if the main processing plant is only operated in the daytime period of 07:00 to 19:00.

9 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE PORTABLE PROCESSING PLANT A portable processing plant may be used in extension land phases 5, 6 and 7. It will be positioned on the quarry floor and be comprised of several stages of crushing, screening and washing. Aggregate product will be stored in stockpiles in and around this portable processing plant. For operation phases where a portable processing plant will operate, it will typically be comprised of the following equipment: 2 Shipment loaders 60T quarry trucks (max 20 trips/hr (40 passes/hr)) Portable Processing Plant, typically comprised of the following o 1 jaw crusher o 1 scalping screen o 1 secondary crusher o 2 classifying screen o 1 tertiary crusher o 1 wash screen o 1 Diesel powered generator set Various assorted conveyors and stackers to move material depending on set-up Shipment trucks may access the extension quarry phases 5, 6 or 7 to pick up product. In phases 5 or 6, the shipment trucks will enter and exit the Acton quarry through the existing entrances. In phase 7, the shipment trucks will directly access this phase. It will have its own entrance and exit. 3.5 SHIPPING There are several on property shipment truck flow patterns that may occur during the proposed quarry extension lands operation. The predicted shipment truck flow patterns were developed based on the existing Acton quarry s product stockpile placement and the 2006 and 2007 truck volume breakdown based on tonnage shipped by product. This resulted in the shipment truck flow patterns of the existing quarry during full load and half load seasons. These represent the two shipment operation conditions that occur within a year. The full load season represents the typical operation of the facility that occurs for most of the year. During the half load season, which refers to a short time period in the spring, fully loaded shipment trucks are not allowed on 4 th Line Road. The shipment truck volumes also reduce significantly during this half load season. In the extension quarry Phase 4 operation, as well as the Phase 5 and 6 operations when no portable processing plant is operating, the shipment truck flow patterns are expected to remain the same as the existing flow patterns. When a portable processing plant is operating in either Phase 5 or Phase 6, it is expected that ¼ of the truck volume will pick up aggregate product in and around the portable processing plant. During the extension quarry Phase 7 operation, the shipment trucks are proposed to directly access this phase. The shipment trucks will arrive from Regional Road No. 25, travel along 22 nd Side road and 3 rd Line to enter the Phase 7 lands. It is expected that the truck volume will be ¼ the overall quarry truck volume.

10 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 10 Table 1 presents the expected truck volumes for the above described operations. Refer to Appendix B for figures presenting the truck flow patterns. Table 1: Maximum Hourly Overall Truck Shipment Traffic Volumes for Entire Quarry (Truck Passes per hour) Case 1 All Shipment in Main Processing Plant Area Case 2 Shipping Activity in Main Processing Plant area and in Phase 5 or 6 Case 3 Shipping Activity in Main Processing Plant area and in Phase 7 Full Load Season Half Load Season Morning (06 07) Day (07 19) Night (19-06) Morning (06 07) Day (07 19) Night (19-06) The shipping operation equipment is understood to be as follows: Up to 6 Shipment loaders Shipment trucks 4.0 POINTS OF RECEPTION 4.1 RECEPTOR LIST AND DESCRIPTION Noise sensitive receptors in the vicinity of the proposed Dufferin Aggregates quarry extension are comprised of single family dwellings located; 1) to the West - houses on Regional Road No. 25 2) to the South - houses on 3 rd Line Road 3) to the East - houses on 4 th Line Road and along 22 nd Side Road 4) to the North - houses along 3 rd Line Road (Note that the directions are Project directions, project North represents a Northwest direction) Aercoustics selected receptor group locations, R1 to R29, which were considered to be representative of these noise sensitive receptors in all directions around the perimeter of the proposed quarry extension lands. Figure 4 illustrates the locations of these residential receptors.

11 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE NOISE CRITERIA 5.1 ACOUSTIC ENVIRONMENT The background noise at the residences in the vicinity of the existing quarry for many decades have had an acoustic environment that is defined by man made noise, generally from the Acton quarry operations. Another source of noise in the vicinity is an aggregate pit operated by CBM Aggregates. The background noise environment for these receptors is consistent with a MOE Class 2 acoustic environment. This type of acoustic environment has its background noise dominated by man made sound during the daytime period. As such the sound level limits are provided in the MOE publication NPC-205 entitled Sound Level Limits for Stationary Sources in Class 1 & 2 Areas (Urban). There are receptors located to the North in a residential subdivision and receptors located along Regional Road 25 and along 4 th Line not in the immediate vicinity of the quarry which have also been considered in this analysis. These receptors have also been classified as MOE Class 2 receptors. Their background noise is defined by man made noise, specifically road traffic noise. The sound level limit for a the residential receptor with a MOE Class 2 acoustic environment can be summarized as follows; The energy averaged sound level (Leq) produced by a source at a receptor location in any one hour period should not exceed the greater of; the energy averaged sound level produced by road traffic in the same hour period, or 50 dba in the daytime period of 07:00-19:00, or 45 dba in the evening and night-time period of 19:00-07:00. The receptor locations located to the south of the existing quarry area are considered to have quiet background sounds in the daytime, evening and night time, dominated by natural sounds or infrequent human activity. These receptors have therefore been designated as Class 3 rural receptors. The sound level limits for this MOE receptor classification is 45 dba in the daytime period of 07:00-19:00 and 40 dba in the evening and night-time period of 19:00-07:00.

12 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE TH LINE ROAD TRAFFIC NOISE PREDICTIONS To establish the background noise produced by road traffic for receptors along 4 th Line Road, located North of 22 nd Side Road, predictions were performed using the MOE STAMSON computer program. The road traffic noise predictions were based on automobile traffic only; truck traffic associated with the Acton quarry was not included. Road traffic counts were performed by Ontario Traffic Inc. in the mornings of Wednesday, August 30 and Tuesday, October 3, Refer to Appendix C for the road traffic count information and the STAMSON computer printout. Table 2 presents the automobile road traffic counts for 4 th Line Road at the 22 nd Side Road. Table 2: Summary of Automobile Road Traffic Counts on 4 th Line Road, North of the 22 nd Side Road Intersection Time Period Traffic Count Wednesday August 30, 2006 Tuesday October 3, 2006 North of 22 nd Sdrd South of 22 nd Sdrd North of 22 nd Sdrd South of 22 nd Sdrd 06:00 07: :00 08: :00 09: :00 10: :00 11: :00 12: These road traffic counts were used to predict the road traffic noise at the receptors along 4 th Line Road; specifically for receptors R18 to R24. Table 3 summarizes the predicted road traffic noise levels at these receptors for the early morning time period of 06:00 07:00. Table 3: Predicted 4 th Line Road Automobile Traffic Noise at Receptors Receptor Distance from Road centre (m) Predicted 06:00 07:00 Road Traffic Noise (dba) R R R R R R

13 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE SOUND LEVEL LIMITS The appropriate noise criteria for the receptors in the vicinity of the Acton extension quarry is based on the Ministry of the Environment (MOE) noise guidelines; specifically MOE Noise Pollution Control publications 1) NPC-233 Guidelines on Information Required for the Assessment of Planned Stationary Sources of Sound 2) NPC-205 Sound Level Limits for Stationary Sources in Class 1 & 2 Areas (Urban) 3) NPC-232 Sound Level Limits for Stationary Sources in Class 3 Areas (Rural) The applicable sound level limits for the residential receptors are provided in the table below. Refer to Figure 4 for the locations of the residential groups. Based on this, the MOE sound level limits at the subject residential receptor groups are as follows: Table 4: Summary of MOE Sound Level Limits Sound Level Limits Leq 1hr versus Time of day (dba) Receptor Morning (06 07) Day (07 19) Night (19-06) R01 R R09 R R15 R R R R R R R R R25 R

14 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE CALCULATION PROCEDURE & PARAMETERS 6.1 NOISE MODEL The quarry operations described in Section 3.0 were modeled to conduct noise predictions at the receptor locations for each of the operational scenarios. These predictions were based on predictable worstcase design conditions for noise emission, which is when the quarry is running at capacity with all of the equipment operating simultaneously. The noise impact calculations are based on established prediction methods as per the ISO standard entitled Acoustics-Attenuation of sound during propagation outdoors - Part 2: General method of calculation. A noise propagation model was created using DataKustik s software Cadna/A version Using the model, Aercoustics predicted the noise impact of the operation at the receptor locations. Where the MOE sound level limits were calculated to be exceeded, additional noise control measures were modeled and the noise impact recalculated. This process was repeated until the sound level limits were satisfied. The acoustic modeling addressed the potential for concurrent operations within multiple phases. This was included in the calculations as assumed operation of two phases in sequence, listed in the table below. Table 5: Concurrent operation phases Main Operation Phase Concurrent Phase Modeled 4 None 5E 4 5W 5E 6W 5E 6E 6W 7 6W 6.2 GROUND ABSORPTION The ground was modelled as being acoustically hard ground within the quarry processing and extraction areas. Outside of these areas, all other ground was modelled as being acoustically soft ground. 6.3 FOILIAGE Foliage was included in this model. Vegetation locations were taken from drawings prepared by Stantec for the Ecological Land Classification mapping. Only dense forest units, with a minimum of 75% tree coverage were used in the acoustic model. A tree height of 9m was assigned to these areas.

15 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE NOISE SOURCES The following table presents the reference sound levels used for the quarry equipment. Table 6: Reference Sound Power Levels for Quarry Equipment Equipment Reference Sound Power Level (db(a)) Rock Drill 125 Excavation Loader 113 Shipment Loader 107 Quarry Trucks 30kph (PWL/m, per truck pass/hr) 74 (77*) Quarry Trucks 30kph (PWL/m, per truck pass/hr) 67 (70*) Portable Processing Plant 128 Enclosed Diesel Genset 103 * NOTE: PWL accounts for trucks traveling up grade. 8.0 RECOMMENDED NOISE CONTROLS Noise controls have been specified to satisfy the sound level limits outlined in Table 4 for each phase of extraction. It should be noted that both daytime and early morning, evening and night time operations are outlined below. Daytime hours refer to the hours fall between the hours of 07:00-19:00, the early morning, evening and night time periods refers to the hours outside of the daytime hours. The specific noise controls required for each phase are outlined in the following sections of this study. The following sections present noise controls that are recommended. 8.1 GENERAL 1) Equipment used for overburden stripping and rehabilitation, as well as other construction projects, should satisfy the noise emission levels of MOE NPC-115 Noise due to Construction Equipment. 2) Quarry Equipment should satisfy the reference sound power levels listed in Table 6. 3) Drilling should be limited to the daytime period of 07:00 19:00. 4) Operation of the Portable Processing Plant in Phases 5, 6 and 7 should be limited to the daytime period of 07:00 19:00. 5) Concurrent operations can occur in two phases with the following conditions satisfied: a. No simultaneous drilling b. No simultaneous portable processing plant operation 6) In the night-time or early morning period of 19:00 07:00 there should not be concurrent aggregate processing and shipment operations.

16 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE ACOUSTIC BARRIER Acoustic barriers are recommended for noise control. An acoustic barrier should be solid with no gaps or openings and satisfy a minimum surface density of 20 kg/m 2 (4 lb/ft 2 ). They can take the form of an earth berm, acoustic fence, aggregate stockpile, a combination of these or any other construction satisfying the requirements of an acoustic barrier PORTABLE DRILL BARRIER SYSTEM For some operation phases, a portable drill barrier system is recommended. This portable drill barrier system should be an acoustic barrier, which should be solid with no gaps or openings and satisfy a minimum surface density of 20 kg/m 2 (4 lb/ft 2 ). The portable barrier should be located within 10m of the drill under operation. The specific orientation of the barrier is defined for each phase of extraction in the following sections when a portable barrier is required. This barrier should have a minimum height of 5m, and be at least 14m long. Examples of a portable barrier system include acoustic fence, an ISO container or a modified truck trailer. 8.2 PHASE 4 The following noise controls are recommended in addition to the General controls for the Phase 4 extraction operation. Figures 5 through 7 outline the extraction operation in this phase and also indicate the required noise controls. 1) The first bench should have a floor elevation of EL+344m or lower. 2) Extraction should generally proceed in a Project Easterly direction. 3) Acoustic barriers should be constructed on portions of the Phase 4 boundary as shown in Figures 5 and 6. These acoustic barriers should have a height of 5m. 4) There should be no Portable Processing Plant operation in this phase. 8.3 PHASE 5E In addition to the General controls outlined in Section 8.1, the following noise controls are recommended for this phase and are also shown in Figure 8 and 9: 1) There should be no Portable Processing Plant operation during extraction of this phase. Note that a Portable Processing Plant may operate in this phase during extraction of the Phase 6E lands. 8.4 PHASE 5W In addition to the General controls outlined in Section 8.1, the following noise controls are recommended for this phase and are also shown in Figure 10: 1) The first bench should have a floor elevation of EL+342m or lower. 2) A 7m high acoustic barrier is required at the western perimeter along the extraction boundary, providing shielding to receptor R05 as seen in Figure 10. 3) A portable barrier system required for drill is required as identified in Figure 10. 4) There should be no Portable Processing Plant operation in this phase.

17 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE PHASE 6W In addition to the General Controls outlined above, additional noise controls are required for these phases of extraction. Figures 11 through 12 outline the extraction operation and the recommended noise controls. 1) The first bench should have a floor elevation of EL+342m or lower. 2) An acoustic barrier is required at the southern perimeter along the extraction boundary with a top elevation of EL+368m, providing shielding to receptors R10-R ) Portable Processing Plant operation to be limited to the daytime hours of 07:00 19:00. 4) The Portable Processing Plant should be shielded to the south from receptors R10-R13 by an acoustic barrier with a height of 12m positioned within 50m of the plant. 1 5) Portable drill barrier system required to provide shielding towards receptor R10-R13. 1 See Figures 11 and PHASE 6E In addition to the General Controls outlined above additional noise controls are required for this phase. Figures 13 and 14 outline the extraction operation in this phase and also the noise controls. 1) The first bench should have a floor elevation of EL+337m or lower. 2) A portable drill barrier system is required to provide shielding towards receptor R10-R ) There should be no Portable Processing Plant operation in the Phase 6E lands. 4) A portable processing plant can operate in Phase 5E or 6W lands during the extraction operation in Phase 6E. Controls for the portable processing plant operating in Phase 6W are outlined in Section ) The portable processing plant should shielded to the south from receptors R10-R13 by 1 a. The rock pillar. The portable processing plant should be positioned within 80m of the rock pillar as seen in Figure 14, or, b. An acoustic barrier with a height of 12m positioned within 50m of the plant. 6) A 8m high acoustic barrier to be located at the southern boundary of Phase 6E. 1 See Figure SOUTH EXTRACTION PHASE 7 NOISE CONTROLS In addition to the General Controls outlined above additional noise controls are required for this phase. Figures 15 through 18 outline the extraction operation in this phase and also the noise controls. 1) The first bench should have a floor elevation of EL+332m or lower. 2) A portable barrier system is required for the drill to provide shielding to receptors R10-R13 as indicated in Figures 15 to These noise controls are exclusively required address the noise impact at receptors R10 R13.

18 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 18 3) An acoustical barrier is required along the entire east perimeter of the Phase 7 extraction footprint. This berm/barrier should have a top elevation of EL+359m. 1 4) A 3m high acoustic barrier to be located along the western boundary of Phase 7. Figure 15 5) The portable processing plant is limited to daytime operation 07:00 19:00. 6) Shipment truck volumes for the early morning period of 06:00 07:00 should be restricted to 32 trucks/hr (64 passes/hr). 7) The Portable plant crushers and screens should be housed in enclosures, providing at least 15dB noise reduction. 1 1 These noise controls are exclusively required address the noise impact at receptors R10 R13.

19 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE PREDICTED NOISE LEVELS WITH CONTROLS Tables 7 through 18 present the predicted noise impacts for each of the operation phases under both full load shipping and half load shipping conditions. For the evening and night-time periods, the noise impact predictions of the Main Processing Plant and Shipment activity are presented separately. This was done as one of the noise controls recommended that these two activities not operate concurrently during the 19:00 07:00 time period. Table 7: Predicted Noise Levels at Receptors Main Operation Phase: Phase 4 Concurrent Operation Phase: None Shipping Operation: Full Load Season Receptor ID Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

20 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 20 Table 8: Predicted Noise Levels at Receptors Main Operation Phase: Phase 5E Concurrent Operation Phase: Phase 4 Shipping Operation: Full Load Season Receptor ID Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

21 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 21 Table 9: Predicted Noise Levels at Receptors Main Operation Phase: Concurrent Operation Phase: Shipping Operation: Receptor ID Phase 5W Phase 5E Full Load Season Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

22 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 22 Table 10: Predicted Noise Levels at Receptors Main Operation Phase: Concurrent Operation Phase: Shipping Operation: Receptor ID Phase 6W Phase 5E Full Load Season Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

23 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 23 Table 11: Predicted Noise Levels at Receptors Main Operation Phase: Concurrent Operation Phase: Shipping Operation: Receptor ID Phase 6E Phase 6W Full Load Season Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

24 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 24 Table 12: Predicted Noise Levels at Receptors Main Operation Phase: Phase 7 Concurrent Operation Phase: Phase 6W Shipping Operation: Full Load Season Receptor ID Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

25 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 25 Table 13: Predicted Noise Levels at Receptors Main Operation Phase: Phase 4 Concurrent Operation Phase: None Shipping Operation: Half Load Season Receptor ID Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

26 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 26 Table 14: Predicted Noise Levels at Receptors Main Operation Phase: Phase 5E Concurrent Operation Phase: Phase 4 Shipping Operation: Half Load Season Receptor ID Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

27 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 27 Table 15: Predicted Noise Levels at Receptors Main Operation Phase: Concurrent Operation Phase: Shipping Operation: Receptor ID Phase 5W Phase 5E Half Load Season Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

28 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 28 Table 16: Predicted Noise Levels at Receptors Main Operation Phase: Concurrent Operation Phase: Shipping Operation: Receptor ID Phase 6W Phase 5E Half Load Season Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

29 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 29 Table 17: Predicted Noise Levels at Receptors Main Operation Phase: Concurrent Operation Phase: Shipping Operation: Receptor ID Phase 6E Phase 6W Half Load Season Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

30 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE 30 Table 18: Predicted Noise Levels at Receptors Main Operation Phase: Phase 7 Concurrent Operation Phase: Phase 6W Shipping Operation: Half Load Season Receptor ID Daytime (07:00-19:00) Evening and Night-time (19:00-07:00) MOE Main Shipment Shipment MOE Full Sound Processing Activity Activity Sound Operation Level Limit Plant (19:00-06:00) (06:00-07:00) Level Limit R R R R R R R R R R R R R R R R R R / 48* R R / 48* R / 46* R / 49* R / 49* R / 46* R R R R R * - These represent sound level limits for the early morning time period of 06:00 07:00

31 DUFFERIN AGGREGATES: ACTON QUARRY EXTENSION PROJECT PAGE NOISE FROM OTHER OPERATIONS A second aggregate operation is located in the vicinity of the Acton Quarry. This operation is an aggregate pit, operated by CBM Aggregates, and has extraction operations on either side of 4 th Line in the vicinity of the intersection of 4 th Line and Glen Lawson Road. Without detailed noise predictions of the CBM Aggregates operation it is assumed that this operation satisfies the MOE sound level limits at the receptors that are common to both this operation and the Dufferin Aggregate quarry, the combined noise levels are expected to be insignificant. If both operations are each at the MOE sound level limit at a receptor, the combined noise levels would be 3 db higher than the noise impact of either operation separately. In environmental noise, a change in 3 db is considered minor CONCLUSION Aercoustics has conducted a noise impact study for the proposed Acton Quarry Extension Lands Project. The purpose of this noise impact study was to provide noise control recommendations in order that the operation within the quarry will satisfy the Ministry of the Environment (MOE) noise guidelines and that predicted noise impacts from the quarry will be acceptable. To this end, sound level limits, based on the MOE noise guidelines, were developed. Calculations were then carried out to determine the worst case noise for each of the quarry operation areas at each of the receptors. Where noise was predicted to exceed the MOE sound level limits, noise control recommendations and required equivalent source reference sound levels were provided. With the implementation of the recommended noise controls, the worst case quarry noise levels are predicted to satisfy the MOE sound level limits and as such the proposed operation will not result in unacceptable impacts on surrounding receptors.