Noise Feasibility Study Proposed Residential Development, 361 Tanbark Road Niagara-on-the-Lake, Ontario Prepared for: Blythwood Homes Inc. 7058 Ridgewood Crescent Niagara Falls, Ontario L2J 3H1 Prepared by Rajjot Arora, BASc EIT and Sheeba Paul, MEng, PEng July 11, 2016
Table of Contents 1 Introduction and Summary... 1 2 Site Description and Noise Sources... 2 2.1 Observations and Site Measurements... 2 3 Noise Level Criteria... 3 4 Traffic Noise Predictions... 4 4.1 Road Traffic Data... 4 4.2 Road Traffic Noise Predictions... 4 5 Discussion and Recommendations... 5 5.1 Outdoor Living Areas... 5 5.2 Indoor Living Areas... 6 5.3 Building Facade Constructions... 7 5.4 Warning Clauses... 8 6 Summary of Recommendations... 10 Figure 1 Figure 2 Figure 3 Key Plan Proposed Site Plan Showing Prediction Locations Proposed Site Plan Showing Acoustic Barriers and Ventilation Requirements Appendix A Traffic Data Appendix B Sample STAMSON 5.04 Output
Noise Feasibility Study, Blythwood Homes Inc. Page 1 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 1 Introduction and Summary HGC Engineering was retained by Blythwood Homes Inc. to conduct a noise feasibility study for a proposed residential development in Niagara-on-the-Lake, Ontario. The development is to be located west of Four Mile Creek Road and south of Line 9 Road. The legal description for the site is Plan of Subdivision of Part of Township Lot 88 (Geographic Township of Niagara), Town of Niagara-onthe-Lake, Regional Municipality of Niagara (RMN). A noise study is required by the Municipality as part of the planning and approvals process. Road traffic information for Four Mile Creek Road was obtained from the Regional Municipality of Niagara. This data was used to predict future traffic sound levels at the locations of the proposed dwelling facades and in the rear yard outdoor living areas. The predicted sound levels were compared to the guidelines of the Ministry of Environment and Climate Change (MOECC) and the RMN. Future daytime and nighttime sound levels exceed MOECC guideline limits at the facades of the dwelling units with exposure to Four Mile Creek Road. Physical mitigation in the form of acoustic barriers will be required for the rear yard outdoor living areas of lots directly flanking onto Four Mile Creek Road. Central air conditioning systems are required for units flanking directly onto Four Mile Creek Road. Forced air ventilation systems with ductwork sized for the future installation of central air conditioning by the occupant will be required for the units with some exposure to Four Mile Creek Road. Upgraded glazing constructions will be required for the units flanking directly onto Four Mile Creek Road. For the remaining units, any building construction meeting the minimum requirements of the Ontario Building Code will provide sufficient acoustical insulation for the indoor spaces. The MOECC guidelines require that noise warning clauses be included in the property and tenancy agreements to inform future residents of the traffic noise impacts. If the Telcon facility to the south remains in operation, the noise impact from the facility should be determined in a noise study and appropriate noise mitigation should be considered for the subject site and for the dwellings.
Noise Feasibility Study, Blythwood Homes Inc. Page 2 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 2 Site Description and Noise Sources Figure 1 is a key plan showing the location of the proposed residential development. The subject site is located on the west side of Four Mile Creek and south of Line 9 Road in Niagara-on-the-Lake, Ontario. Figure 2 shows the site plan prepared by Upper Canada Consultants, dated March 23, 2016. The proposed development will include 18 single detached lots and 11 blocks of townhouses. 2.1 Observations and Site Measurements HGC Engineering personnel visited the site during the month of December 2105 to make observations of the surrounding acoustical environment. Four Mile Creek Road was noted to be the dominant source of traffic noise. Line 9 Road is a two lane roadway (one lane each direction) east of Four Mile Creek Road and a single unpaved road west of Four Mile Creek Road. The subject site is currently vacant. There are existing single detached homes along Four Mile Creek Road and along Line 9 Road. Most of the surrounding land is existing/future residential uses. South of the site is Telcon Datvox Network Cabling. It is understood that the Telcon site to the south will be developed into residential uses in the future, as noted in the site plan. If the Telcon operation to the south remains in operation as the subject site moves forward in the approvals process, the noise impact from the Telcon site should be considered in the analysis and appropriate noise mitigation should be considered for the site and for the dwellings. To the southeast of the site is St. David s Cold Storage. Noise from this facility was not audible during site visit. There is a pumping station located to the east of Four Mile Creek Road and south of the existing residences. A site visit was conducted on March 3, 2016 along with RMN personnel to facilitate an inspection and sound level measurement of the pumping station. The potentially significant noise source associated with the pumping station is a Standby Generator used for emergency purposes which is tested monthly during the daytime hours. The generator was operated during the site visit and sound levels were measured in the vicinity. The measurements and the results of cursory calculations indicate that the sound emissions from the pumping station are not expected to exceed MOECC Guideline limits at the development site since traffic is dominant in the area. The pumping station is not considered further in this report. There are no other significant stationary sources of noise within 500 meters of the development.
Noise Feasibility Study, Blythwood Homes Inc. Page 3 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 3 Noise Level Criteria Guidelines for acceptable levels of road traffic noise impacting residential developments are given in the MOECC publication NPC-300, Environmental Noise Guideline Stationary and Transportation Sources Approval and Planning, release date October 21, 2013, and are listed in Table I below. The values in Table I are equivalent (average) sound levels [LEQ] in units of A-weighted decibels [dba]. Table I : MOECC Road Traffic Noise Criteria (dba) Area Daytime L EQ (16 hour) Nighttime L EQ (8 hour) Outside Bedroom Windows 55 dba 50 dba Outdoor Living Area 55 dba -- Inside Living/Dining Rooms 45 dba 45 dba Inside Bedrooms 45 dba 40 dba Daytime refers to the period between 07:00 and 23:00. Nighttime refers to the time period between 23:00 and 07:00. The term "Outdoor Living Area" (OLA) is used in reference to an outdoor patio, backyard, terrace, or other area where passive recreation is expected to occur. The guidelines in the MOECC publication allow the future sound level in an Outdoor Living Area to be exceeded by up to 5 dba, without mitigation, if warning clauses are placed in the purchase and rental agreements to the property. Where OLA sound levels will exceed 60 dba, physical mitigation will be required to reduce the OLA sound level to below 60 dba and as close to 55 dba as technically, economically and administratively feasible. A central air conditioning system as an alternative means of ventilation to open windows is required for dwellings where nighttime sound levels outside bedroom windows will exceed 60 dba or daytime sound levels outside living room windows will exceed 65 dba. Forced-air ventilation with ducts sized to accommodate the future installation of air conditioning by the occupant will be required when nighttime sound levels at bedroom windows will be in the range of 51 to 60 dba or when daytime sound levels at living room windows will be in the range of 56 to 65 dba.
Noise Feasibility Study, Blythwood Homes Inc. Page 4 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 Building components such as walls, windows and doors must be designed to achieve the indoor sound level criteria when the nighttime plane of window sound level will be greater than 60 dba or the daytime plane of window sound level will be greater than 65 dba. The use of warning clauses to notify future residents of possible excesses is also required. 4 Traffic Noise Predictions 4.1 Road Traffic Data Road traffic data for Four Mile Creek Road was obtained from the Region of Niagara in the form of 8-hour Turning Movement Count for the year 2014, and is attached in Appendix A. An average annual daily traffic (AADT) of 9 754 vehicles per day was applied. The data was projected 20 years to the year 2036, as per Region of Niagara policy dated November 1, 2006, using a 2.5% growth rate. A commercial vehicle percentage of 8% was split into 3%/5% medium and heavy trucks using Ministry of Transportation (MTO) procedures. A posted speed limit of 60 kph was also used along with a day/night split of 85%/15% since Four Mile Creek Road is a regional roadway. Four Mile Creek Road is situated at approximately the same grade as the proposed development. Table II summarizes the road traffic data used in the analysis. Table II: Projected Road Traffic Data to 2036 Medium Heavy Road Name Cars Total Trucks Trucks Daytime 13 132 428 714 14 273 Four Mile Creek Nighttime 2 317 76 126 2 519 Road Total 15 449 504 840 16 792 4.2 Road Traffic Noise Predictions To assess the levels of road traffic noise which will impact the site in the future, predictions were made using STAMSON version 5.04, a computer algorithm developed by the MOECC. Sample STAMSON output is included in Appendix B. Predictions of the traffic sound levels were made at various prediction locations. Sound levels were also predicted in the rear yard outdoor living areas to determine acoustic barrier requirements. These results are summarized in Table III.
Noise Feasibility Study, Blythwood Homes Inc. Page 5 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 Table III: Predicted Future Sound Levels, Without Mitigation, [dba] Unit No. 1 18 19 20 21 22 23 24 25 27 41 Description Townhouse unit with some exposure to Four Mile Creek Townhouse unit with some exposure to Four Mile Creek Townhouse unit with some exposure to Four Mile Creek Townhouse unit with some exposure to Four Mile Creek Townhouse unit with some exposure to Four Mile Creek Townhouse unit with some exposure to Four Mile Creek Townhouse unit flanking onto Four Mile Creek Townhouse unit with some exposure to Four Mile Creek Townhouse unit with some exposure to Four Mile Creek Townhouse units fronting onto Four Mile Creek Daytime in OLA L EQ-16 hr Daytime at Façade L EQ-16 hr Night-time at Façade L EQ-8 hr 55 55 50 <55 <55 50 <55 55 51 56 56 52 58 58 54 60 60 56 65 66 62 61 63 59 <55 <55 50 <55 63 59 5 Discussion and Recommendations The predictions indicate that the traffic sound levels will exceed the outdoor MOECC guidelines listed in Table I at the façades with exposure to Four Mile Creek Road and the rear yards with exposure to Four Mile Creek Road. Recommendations to meet the indoor MOECC guidelines are discussed below. 5.1 Outdoor Living Areas The predicted daytime sound levels in the OLA s of the lots directly flanking onto Four Mile Creek Road (Unit 23) will be 65 dba, 10 dba in excess of the MOECC s limit of 55 dba. Physical mitigation in the form of acoustic barriers will be required. An acoustic barrier 2.0 m in height will reduce the sound level in the rear yards to 58 dba. The 3 dba in excess of MOECC s limit is acceptable with the use of a noise warning clause.
Noise Feasibility Study, Blythwood Homes Inc. Page 6 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 The predicted daytime sound levels in the OLA s of the lots with some exposure to Four Mile Creek (Unit numbers 22 and 21) will be 60 dba and 58 dba. With the 2.0 m high acoustic barrier along the rear of the unit flanking onto Four Mile Creek Road (Unit 23), the sound levels in the rear yards of Units 22 and 21 will be reduced to 55 dba or less. Further physical mitigation is not required. The predicted daytime sound levels in the OLA s of the lots with exposure to Four Mile Creek Road (Unit number 24) will be 61 dba, 6 dba in excess of the MOECC s limit of 55 dba. Physical mitigation in the form of acoustic barriers will be required. An acoustic barrier 2.0 m in height will reduce the sound level in the rear yards to 55 dba. A noise warning clause is also required. Acoustic barriers can be any combination of an earth berm with an acoustic wall on top. All noise barriers must return back to the dwelling units so that the rear yards are entirely shielded from the roadway. The wall component of the barrier should be of a solid construction with a surface density of no less than 20 kg/m 2. The walls may be constructed from a variety of materials such as wood, brick, pre-cast concrete or other concrete/wood composite systems provided that it is free of gaps or cracks within or below its extent. Noise warning clauses are required for the lots with acoustic barrier requirements. Figure 3 indicates the approximate location and extent of the acoustic barriers for the rear yards of the units with exposure to Four Mile Creek Road. When grading information is available, the acoustic barrier heights should be refined. For the remainder of the lots in the subdivision, the predicted daytime sound levels in the OLA s are less than 55 dba and physical mitigation is not be required. 5.2 Indoor Living Areas Central Air Conditioning The predicted daytime sound level at the plane of living/dining room window of townhouse units directly flanking onto Four Mile Creek Road (Unit 23 and 24) will exceed 65 dba and 60 dba during nighttime at the plane of bedroom windows. To address these excesses, the MOECC guidelines recommend that these townhouse units be equipped with central air conditioning, so that the windows can be kept closed. Window or through-the-wall air conditioning units are not recommended because of the noise they produce and because the units penetrate through the exterior
Noise Feasibility Study, Blythwood Homes Inc. Page 7 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 wall which degrades the overall sound insulating properties of the envelope. The location, installation and sound ratings of the outdoor air conditioning devices should minimize noise impacts and comply with criteria of MOECC publication NPC-300. Figure 3 shows the buildings that require central air conditioning. Provision for Air Conditioning The predicted nighttime sound levels outside the bedroom windows of the future dwellings with some exposure to Four Mile Creek Road (units 19 22 and 27 41) will have nighttime sound levels that are in the range of 51 to 60 dba. These dwelling units require the provision for the future installation of central air conditioning systems. This requirement is typically satisfied through the installation of forced air ventilation systems with ductwork sized for the future installation of central air conditioning by the occupant. The location, installation and sound ratings of the outdoor air conditioning devices should minimize noise impacts and comply with criteria of MOECC publication NPC-300. Figure 3 shows the dwellings that require forced air ventilation systems. The remaining units will have sound levels below 55 dba during the daytime and 50 dba during the nighttime and therefore do not require any specific ventilation requirements. 5.3 Building Facade Constructions MOECC guidelines recommend that sound attenuating building constructions be specified for units where the nighttime sound levels exceed 60 dba and where daytime levels exceed 65 dba. This applies to the dwelling units flanking onto Four Mile Creek Road as sound levels exceed 65 dba during daytime and 60 dba during nighttime. Calculations have been performed to determine the building envelope constructions likely to be required to maintain indoor sound levels within MOECC guidelines. The calculation methods were developed by the National Research Council (NRC). They are based on the predicted future sound levels at the building facades and the anticipated area of the facade components (walls, windows and doors) relative to the floor area of the adjacent room. The minimum necessary specification for the building envelope is Acoustical Insulation Factor, AIF-27 for bedrooms and AIF-26 for living/dining/family rooms, based on the possibility of sound
Noise Feasibility Study, Blythwood Homes Inc. Page 8 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 entering the buildings through the walls and windows. As a general guideline, a glazing construction with two panes of 3 mm glass and 13 mm airspace will be sufficient for the dwelling unit as long as the window to floor area ratio does not exceed 50% for the bedroom windows and 63% for living/dining room windows. If patio doors are to be used in the dwellings, they must be included in the window area. When detailed floor plans and building elevations are available for the townhouse units (Units 23, 24) flanking onto Four Mile Creek Road, an acoustical consultant should provide revised glazing construction based on actual window to floor area ratios. All of the other lots in the development will have predicted sound level less than 65 dba during the daytime and less than or equal to 60 dba during the nighttime. Thus, any exterior wall and double glazed window construction meeting the minimum requirements of the Ontario Building Code (OBC) will provide adequate sound insulation. 5.4 Warning Clauses The MOECC guidelines recommend that warning clauses be included in the property and tenancy agreements for all units with anticipated road traffic sound level excesses. Examples are provided below. A suggested wording for future dwelling units which have sound level excesses but do not require mitigation measures is given below. Type A: Purchasers/tenants are advised that sound levels due to increasing road traffic on Four Mile Creek Road may occasionally interfere with some activities of the dwelling unit occupants as the sound levels exceed the Municipality s and the Ministry of the Environment and Climate Change s noise criteria. Suggested wording for future dwellings for which physical mitigation has been provided is given
Noise Feasibility Study, Blythwood Homes Inc. Page 9 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 below. Type B: Purchasers/tenants are advised that despite the inclusion of noise control features in the development and within the building units, sound levels due to increasing road traffic may occasionally interfere with some activities of the dwelling occupants as the sound levels exceed the noise criteria of the Municipality and the Ministry of the Environment and Climate Change. A suggested wording for future dwellings requiring forced air ventilation systems is given below. Type C: This dwelling unit has been fitted with a forced air heating system and the ducting etc., was sized to accommodate central air conditioning. Installation of central air conditioning will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the Municipality s and the Ministry of the Environment and Climate Change noise criteria. (Note: The location and installation of the outdoor air conditioning device should be done so as to minimize the noise impacts and comply with criteria of MOECC publication NPC-300) A suitable wording for future dwellings requiring central air conditioning systems if given below. Type D: This dwelling unit has been supplied with a central air conditioning system which will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the Municipality s and the Ministry if the Environment Climate Change noise criteria. These sample clauses are provided by the MOECC as examples and can be modified by the Municipality as required. An additional noise warning clause is required by the Region of Niagara and shall be included in the subdivision agreement and inserted in all Agreements of Purchase and Sale or Lease for each dwelling unit: Type E:
Noise Feasibility Study, Blythwood Homes Inc. Page 10 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 The lands in the plan of subdivision may be exposed to noise, odour and dust from nearby agricultural operations and agricultural-related traffic, industrial operations and industrial/commercial traffic that may occasionally interfere with some activities of the owners who may occupy these lands. 6 Summary of Recommendations The following recommendations are provided in regard to road traffic noise mitigation. 1. Acoustic barriers are required for the rear yards of units with exposure to Four Mile Creek Road (Units 23 and 24). 2. Central air conditioning will be required for units flanking onto Four Mile Creek Road (Units 23 and 24). Forced air ventilation systems with ductwork sized for the future installation of central air conditioning by the occupant is required for the future dwellings with exposure to Four Mile Creek Road (Units 19 22 and 27 41). The locations, installation and sound rating of the air conditioning devices should comply with NPC-300. 3. Upgraded glazing constructions will be required for units flanking onto Four Mile Creek Road. For all remaining units, any exterior wall, and double glazed window construction meeting the minimum requirements of the Ontario Building Code (OBC) will provide adequate sound insulation. 4. Noise warning clauses to inform the occupants of the sound level excesses should be placed in the property and tenancy agreements. 5. A detailed noise study is required to revise the acoustic recommendations for acoustic barriers when grading information for the site. 6. When detailed floor plans and building elevations are available for the units flanking onto Four Mile Creek Road, an acoustical consultant should provide revised glazing construction based on actual window to floor area ratios. 7. If Telcon facility to the south remains in operation as the subject site moves forward in the approvals process, the noise impact from the Telcon site should be considered in a noise impact study and appropriate noise mitigation should be considered for the site and for the dwellings.
Noise Feasibility Study, Blythwood Homes Inc. Page 11 361 Tanbark Road, Niagara-on-the-Lake, Ontario July 11, 2016 The noise control recommendations are summarized Table IV. The reader is referred to the previous sections of the report where these recommendations are discussed in more detail. Table IV: Summary of Road Traffic Noise Control Requirements and Noise Warning Clauses Unit No. Type of Upgraded Acoustic Ventilation Warning Building Barrier Requirements* Clause Construction 1 -- Forced Air A, C, E OBC 18 -- Forced Air A, C, E OBC 19 -- Forced Air A, C, E OBC 20 -- Forced Air A, C, E OBC 21 -- Forced Air A, C, E OBC 22 -- Forced Air A, C, E OBC 23 Central A/C B, D, E LR/DR: AIF-26 24 Central A/C B, D, E BR: AIF-27 LR/DR: AIF-26 BR: AIF-27 25 -- Forced Air A, C, E OBC 27 41 -- Forced Air A, C, E OBC Note: Type E noise warning clause is required for all the lots in the subdivision as required by the Region of Niagara -- no specific requirement * The location, installation and sound rating of the air conditioning condensers must be compliant with MOECC Guideline NPC-300. AIF building constructions must meet the minimum Acoustical Insulator Factor LR/DR Living/Dining Room, BR Bedroom OBC Ontario Building Code Requirements
#361 TANBARK ROAD TOWN OF NIAGARA-ON-THE-LAKE SUBJECT LANDS KEY PLAN LEGAL DESCRIPTION PART 1, PART OF LOT 88 GEOGRAPHIC TOWNSHIP OF NIAGARA TOWN OF NIAGARA-ON-THE-LAKE REGIONAL MUNICIPALITY OF NIAGARA SITE PLAN 1509-SITE 0
#361 TANBARK ROAD TOWN OF NIAGARA-ON-THE-LAKE SUBJECT LANDS KEY PLAN LEGAL DESCRIPTION PART 1, PART OF LOT 88 GEOGRAPHIC TOWNSHIP OF NIAGARA TOWN OF NIAGARA-ON-THE-LAKE REGIONAL MUNICIPALITY OF NIAGARA SITE PLAN 1509-SITE 0
APPENDIX A Traffic Data
Turning Movement Count Report Full Study Location... Municipality... GeoID... Count Date... Four Mile Creek Road @ York Road NIAGARA-ON-THE-LAKE 00913 Wednesday, 13 August, 2014 Four Mile Creek Road 4877 Peds 1 2431 Total Truck % Trucks Cars 608 13% 82 526 1732 6% 108 1624 91 2% 2 89 2446 7% 179 2267 Peds 10 York Road 121 7 5% 128 1643 9% 136 1502 476 15 3% 491 1297 3579 611 13% 77 534 1936 678 3% 21 657 W N S E 647 31 5% 678 1453 53 4% 1506 2803 647 6% 38 609 Peds 0 2880 177 6% 3057 500 1612 707 44 95 30 8% 6% 4% 544 1707 737 Cars Trucks Truck % Total 2988 Peds 10 6045 Thursday, September 24, 2015 Page 1 of 1
APPENDIX B Sample STAMSON 5.04 Output
Page 1 of 1 Unit 23 ola STAMSON 5.0 NORMAL REPORT Date: 10-07-2016 19:03:09 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: 23ola.te Time Period: 16 hours Description: Daytime sound levels in the flanking rear yard adjacent to the roadway, without mitigation Road data, segment # 1: Four Mile --------------------------------- Car traffic volume : 13132 veh/timeperiod * Medium truck volume : 428 veh/timeperiod * Heavy truck volume : 714 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) Data for Segment # 1: Four Mile ------------------------------- Angle1 Angle2 : -45.00 deg 90.00 deg Wood depth : 0 (No woods.) No of house rows : 0 Surface : 1 (Absorptive ground surface) Receiver source distance : 22.00 m Receiver height : 1.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : 0.00 Results segment # 1: Four Mile ------------------------------ Source height = 1.50 m ROAD (0.00 + 64.55 + 0.00) = 64.55 dba Angle1 Angle2 Alpha RefLeq P.Adj D.Adj F.Adj W.Adj H.Adj B.Adj SubLeq ------------------------------------------------------------------------- --- -45 90 0.66 69.60 0.00-2.76-2.29 0.00 0.00 0.00 64.55 ------------------------------------------------------------------------- --- Segment Leq : 64.55 dba Total Leq All Segments: 64.55 dba TOTAL Leq FROM ALL SOURCES: 64.55
Page 1 of 2 Unit 23 facade STAMSON 5.0 NORMAL REPORT Date: 10-07-2016 19:03:42 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: loca.te Time Period: Day/Night 16/8 hours Description: Daytime and nighttime sound levels at the façade closest to the roadway Road data, segment # 1: Four Mile (day/night) --------------------------------------------- Car traffic volume : 13132/2317 veh/timeperiod * Medium truck volume : 428/76 veh/timeperiod * Heavy truck volume : 714/126 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): 9754 Percentage of Annual Growth : 2.50 Number of Years of Growth : 22.00 Medium Truck % of Total Volume : 3.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : 85.00 Data for Segment # 1: Four Mile (day/night) ------------------------------------------- Angle1 Angle2 : -90.00 deg 90.00 deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : 19.00 / 19.00 m Receiver height : 1.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : 0.00 Results segment # 1: Four Mile (day) ------------------------------------ Source height = 1.50 m ROAD (0.00 + 66.44 + 0.00) = 66.44 dba Angle1 Angle2 Alpha RefLeq P.Adj D.Adj F.Adj W.Adj H.Adj B.Adj SubLeq ------------------------------------------------------------------------- --- -90 90 0.66 69.60 0.00-1.70-1.46 0.00 0.00 0.00 66.44 ------------------------------------------------------------------------- --- Segment Leq : 66.44 dba Total Leq All Segments: 66.44 dba
Page 2 of 2 Unit 23 facade Results segment # 1: Four Mile (night) -------------------------------------- Source height = 1.50 m ROAD (0.00 + 62.17 + 0.00) = 62.17 dba Angle1 Angle2 Alpha RefLeq P.Adj D.Adj F.Adj W.Adj H.Adj B.Adj SubLeq ------------------------------------------------------------------------- --- -90 90 0.57 65.08 0.00-1.61-1.30 0.00 0.00 0.00 62.17 ------------------------------------------------------------------------- --- Segment Leq : 62.17 dba Total Leq All Segments: 62.17 dba TOTAL Leq FROM ALL SOURCES (DAY): 66.44 (NIGHT): 62.17