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Kings Forest Stage 1 Project Application
ENVIRONMENTAL NOISE IMPACT REPORT
Prepared for:
Project 28 Pty Ltd
24 August 2012 crgref: 09371a report rev.2
Page 2
1.0 INTRODUCTION
1.1 Executive Summary
The Kings Forest Stage 1 Project Application No. MP 08_0194 was lodged in November 2011. The
Application and Environmental Assessment Report was advertised from December 2011 to January
2012 following which 302 public submissions and 10 agency submissions were received.
As a result of the submissions, amendments to the project have been made. The amended project
contains the following key elements (NB: these elements will be revised and updated as the amended
project is finalised).
Subdivision to create new lots for future development;
o Bulk earthworks across the site;
o Road works comprising:
- construction of the entrance road into the site and associated intersection works on Tweed
Coast Road;
- alignment and construction of the proposed Kings Forest Parkway from Tweed Coast Road
via Precincts 4 and 5 through to the western precincts; and
- alignment and part construction of two proposed roads through SEPP 14 areas to access the
southern precincts;
Development of 2,036 m2 of floor space for rural supplies development and access arrangements
within Precinct 1;
Construction of subdivision and infrastructure works along the Kings Forest Parkway and within
Precincts 1 and 5;
The Plan of Development for Precinct 5.
This report is in response to a request by Project 28 Pty Ltd for an environmental noise impact
assessment of the proposed “Kings Forest” Estate, Stage 1 Project Application at Cudgen, Northern
NSW.
Page 3
1.2 Report Preliminary Notes
This report is a revision to a previous acoustic assessment (CRG ref: 09371a report rev.1) dated March
2011). This revised Report addresses the amendments to the project and the key issues raised in the
submissions.
In undertaking the above acoustic assessment, predictions of existing and future road traffic noise
impacts were produced as well as commercial activity noise impacts (from the proposed commercial
precincts within the “Kings Forest” estate) and construction activity noise.
The adopted criterion road traffic noise has been sourced from the NSW EPA “Environmental Criteria
for Road Traffic Noise” (ECRTN) with commercial activity noise assessed in accordance with New
South Wales EPA “Industrial Noise Policy”; and construction activity noise assessed in accordance
with the NSW EPA’s “Interim Construction Noise Guideline”.
Based upon noise criterion this assessment explores available acoustic treatment options suitable for
the development site and provides recommendations for a balanced acoustic treatment outcome. We
note that a balanced treatment strategy for road traffic noise is supported by both the ECRTN (refer to
Section 3.6 of the document); and the NSW Department of Planning document “Development near
Rail Corridors and Busy Roads – Interim Guideline” (refer to Section 3.8 of the document).
The final acoustic recommendations provided within this report not only provide a balance of suitable
options, but are also generally considered urban planning best practice.
Page 4
2.0 SITE & DEVELOPMENT DESCRIPTION
The proposal relates to the “Kings Forest” Estate Stage 1 Project Application No. MP 08_0194 lodged
in November 2011. For site location refer to Appendix A of this report.
The “Kings Forest” estate is bounded by Tweed Coast Road to the east, Duranbah Road to the west,
and Cudgen Nature Reserve to the south.
The amended project contains the following key elements (NB: these elements will be revised and
updated as the amended project is finalised).
Subdivision to create new lots for future development;
o Bulk earthworks across the site;
o Road works comprising:
- construction of the entrance road into the site and associated intersection works on Tweed
Coast Road;
- alignment and construction of the proposed Kings Forest Parkway from Tweed Coast Road
via Precincts 4 and 5 through to the western precincts; and
- alignment and part construction of two proposed roads through SEPP 14 areas to access the
southern precincts;
Development of 2,036 m2 of floor space for rural supplies development and access arrangements
within Precinct 1;
Construction of subdivision and infrastructure works along the Kings Forest Parkway and within
Precincts 1 and 5;
The Plan of Development for Precinct 5 (for development plans refer to Appendix B).
The acoustic environment at the site is generally influenced by traffic noise from The Tweed Coast
Road. The Tweed Coast Road at the location of the subject site is a two lane road and currently carries
in the order of 9,187 vehicles per day (as of year 2009).
As the subdivision is likely to be impacted by road traffic noise from The Tweed Coast Road, the
development is required to be assessed in accordance with New South Wales EPA “Environmental
Criteria for Road traffic Noise” (ECRTN). The Policy “provides a framework that guides the
consideration and management of traffic noise issues associated with new building developments near
existing or new roads, and new or upgraded road developments adjacent to new or planned building
developments. The framework must allow the best mix of short-, medium- and longterm strategies to be
selected to meet the appropriate noise level, given existing and emerging conditions”.
Assessment of traffic generated by the development is also required to be assessed, as with traffic noise
from the completed Kings Forest Parkway.
Commercial activity noise from the future commercial precincts of the “Kings Forest” estate (i.e.
school to the north and town centre to the west) have been assessed to ensure acceptable noise amenity
can be achieved at the proposed residential lots within Precinct 5.
Page 5
3.0 NOISE CRITERIA
3.1 Road Traffic Noise
Assessment of potential noise impacts from road traffic are required to be conducted as per the New
South Wales EPA ECRTN “Environmental Criteria for Road traffic Noise” (Refer to Table 1 below).
3.1.1 External Criterion
We note The Tweed Coast Road is considered an Arterial Road based upon the road definitions
provided within the ECRTN document. The future access road to Precinct 5 (Kings Forest Parkway) is
considered a collector road.
Table 1 (P4 to 5): Road noise criteria from “Environmental Criteria for Road Traffic Noise”.
Page 6
Table 1 (P4 to 5): Road noise criteria from “Environmental Criteria for Road Traffic Noise”.
3.1.2 Internal Criterion
Further to the above, as the criterion for “new residential developments affected by freeway / arterial
traffic noise” and “collector roads” and the new draft “NSW Road Noise Policy” refers to internal
layouts, building arterials and construction as methods for minimising road traffic noise impacts; hence
we provide the following internal noise limits for assessment of internal areas of future onsite
dwellings:
We recommend applying the “Maximum” indoor sound levels as specified in Australian Standard
AS/NZS 2107:2000 “Acoustics – Recommended Design Sound Level and Reverberation Times for
Building Interiors”. These levels expressed as LAeq and are presented in Table 2 below:
7. RESIDENTIAL BUILDINGS Recommended Design Sound Level, LAeq dB(A)
Satisfactory Maximum
Houses and apartments near major roads –
Living areas
Sleeping areas
Work areas
35
30
35
45
40
45
Table 2: Internal noise limits from AS/NZS 2107.
Page 7
3.2 Commercial Activity Noise
Commercial activity associated with the future Town Centre Precinct and Community Facilities
Precinct of the “Kings Forest” Estate is regulated by the New South Wales EPA “Industrial Noise
Policy”.
The assessment procedure has the following components:
Control of intrusive noise impacts – The limit criteria for this assessment is as follows:
LAeq, 15 min ≤ rating background level1 + 5 dB;
Maintaining noise level amenity for residential premises. This is achieved by ensuring that the
proposed development complies with the noise limit criteria set in Table 2.1 of the Policy. If we
assume that the area will be within an Urban Area (as defined in the Policy) at the completion of
the “Kings Forest” Estate, the following limits apply:
Table 3: Amenity Criterion Prescribed in the New South Wales EPA “Industrial Noise Policy”.
With regards to the LAeq, 15 min ≤ rating background level + 5 dB criterion, based upon the location of
the subject site, the area is considered to be a Category R3 area (Areas with medium density
transportation and some commerce or industry) as defined in Australian Standard AS1055.2-1997. The
background noise levels for a Category R3 are presented as an attachment in Appendix A (i.e.
50 dB(A) during the daytime, 45 dB(A) evening and 40 dB(A) night-time).
By considering the above criteria, we recommend the following noise limits for the proposed use:
Daytime (7 am – 6 pm Mon-Sat; 8 am – 6 pm Sun) 55 (AS1055 50 + 5) dB(A) Leq;
Evening (6 pm – 10 pm) 50 (AS1055 45 + 5) dB(A) Leq; and
Night (remaining periods) 45 (AS1055 40 + 5) dB(A) Leq.
Overall, the resulting LAeq, 15 min ≤ rating background level + 5 dB criterion are at or below the
“Acceptable” amenity criterion levels for an Urban area (refer to Table 3 above).
Further to the above criteria, we recommend applying a design target of 45 dB(A) L10 inside living
areas and bedrooms from short term noise events. This level is within sleep disturbance prevention
criteria set by the World Health Organisation.
1 The rating background level is the overall single figure background level representing each assessment period
(day/evening/night over the whole monitoring period.
Page 8
3.3 Construction Noise Criteria
The NSW EPA’s “Interim Construction Noise Guideline” provides the following guidance in relation
to construction noise:
Based upon the criterion presented above and the background levels for a Category R3 area (Areas with
medium density transportation and some commerce or industry) the following noise limits apply:
Receiver Type Noise Limit Criterion LAeq dB(A)
Residential Dwelling or Motel 60 (Background RBL 50 + 10 dB(A))
Commercial Premises 70
Industrial Premises 75
Table 4: Construction activity noise limits.
It is also noted that Australian Standard AS 2436 – 1981 “Guide to noise control on construction,
maintenance and demolition sites” provides extra guidance for management of on-site noise.
Page 9
4.0 CALCULATIONS AND RESULTS
4.1 Modeled Road Traffic Noise Levels
4.1.1 Existing and Future Traffic Volumes
Tweed Shire Council has advised that in year 2009 the Tweed Coast Road carried in the order of 9,187
vehicles per day. Applying a 2% compound annual growth rate provides a year 2023 traffic volume of
12,140 vehicles per day.
With regards to entire “Kings Forest” development (including Precinct 5), the CRG Traffic Report
(CRG ref 09055t dated July 2012) indicates that Kings Forest Parkway will ultimately carry in the
order of 23,852 vehicles per day with 57% of traffic expected to head north along the Tweed Coast
Road and 43% to head south (determined by combining the morning and afternoon peak percentages to
determine a daily percentage). We note that entry into and exist from the “Kings Forest” development
is from the northern leg of Kings Forest Parkway only at intersection with The Tweed Coast Road.
Trips generated by Precinct 5 dwellings on the road network are estimated to be at 9 trips per day as per
the CRG Traffic Report (CRG ref 09055t dated July 2012). Based upon 431 dwellings within
Precinct 5 the resulting traffic on Tweed Coast Road and Kings Forest Parkway are as follows:
Development Site Dwellings Daily Trips on Road Network
Precinct 5 431 3,879
Table 5: Precinct 5 Site Trip Generation.
Based upon the above predicted traffic volumes we provided the following local road summary.
Table 6: Traffic Volume Summary for the local roads.
4.1.2 Adopted Road Traffic Noise Descriptors Based upon Traffic Volumes
From the above vehicle passes (for each time period) along the northern leg of Kings Forest Parkway
we predicted the following LAeq road traffic noise impact levels at 10m from the road. Refer to
Appendix C of this report for calculation results.
Receiver Location Predicted Traffic Noise: Façade Corrected dB(A)
LAeq 24hr LAeq 15hr LAeq 9hr LAeq 1hr Daytime LAeq 1hr Night time
Dwellings along Parkway 67 69 60 71 66
Adjustment from the LAeq 24hr N/A +2 -7 +4 -1
Table 7: Comparison of LAeq levels to the LAeq 24hr.
AADT 15hr 9hr Day 1hr Peak Night 1hr Peak
Percentage of Total Volume 100% 93% 7% 10% 3%
The Tweed Coast Road 12140 11290 850 1214 364
Kings Forest Parkway (northern leg) 19973 18575 1398 1997 599
Kings Forest Parkway (western leg) 19973 18575 1398 1997 599
AADT 15hr 9hr Day 1hr Peak Night 1hr Peak
Percentage of Total Volume 100% 93% 7% 10% 3%
The Tweed Coast Road 3879 3607 272 388 116
Kings Forest Parkway (northern leg) 3879 3607 272 388 116
Kings Forest Parkway (western leg) 1940 1804 136 194 58
Ultimate Volumes on Local Roads Without
Precint 5 Generated Traffic
Traffic Volume
Precinct 5 Generated Traffic Volume on
Local Roads
Traffic Volume
Page 10
4.1.3 Precinct 5 Noise Impacts from Additional Traffic on the Surrounding Road Network
Based upon the ultimate traffic volumes presented in Table 6 of Section 4.1.2 (which includes the
completed “Kings Forest” development); and the trip generation rates expected from the completed
Precinct 5 we present the following traffic noise increase predictions.
Measurements from a similar previous site in NSW were taken of vehicles travelling along a local road.
Table 8 below presents the measured noise levels.
Road Traffic Noise Measurements Measured Level at 10m from Passing Vehicles dB(A)
Average LAeq passby 59
Average SEL passby 71 (15 sec.)
Table 8: Measured vehicles pass-bys on a locale street.
Predicted LAeq levels for the local roads have been determined by multiplying the measured SEL of a
vehicle pass-by by the number of car passes for each time period. Refer to Appendix C for
calculations. We note that the above method has been applied given that the local roads within the
“Kings Forest” development are note yet constructed, and to incorporate the local road environment
(i.e. undertaking of attended measurements of vehicles using a local NSW road).
The predicted LAeq,15hr, LAeq,9hr, and LAeq,1hr noise levels at existing offsite dwellings and future
dwellings within the “Kings Forest” estate are presented in Table 9. We note that the levels are
predicted at 10m from Kings Forest Parkway and 40m from The Tweed Coast Road and do not include
acoustic barrier treatments.
Receiver Location Predicted Traffic Noise: Façade Corrected dB(A)
LAeq 15hr LAeq 9hr LAeq 1hr Daytime LAeq 1hr Night time
Without Precinct 5 Generated Traffic
Existing Dwellings along Tweed Coast Rd 59 50
Future Dwellings along Parkway (North) 71 66
Future Dwellings along Parkway (West) 71 66
With Precinct 5 Generated Traffic
Existing Dwellings along Tweed Coast Rd 61 52
Future Dwellings along Parkway (North) 72 66
Future Dwellings along Parkway (West) 71 66
Criterion 60 55 60 55
Table 9: Predicted noise impacts at existing streets.
Precinct 5 traffic volume comprises 24% of the total traffic volume travelling along The Tweed Coast
Road (excluding traffic volume from the remaining “Kings Forest” estate as worst case scenario),
which would result in an overall 1.2 dB increase of the traffic noise from the Precinct 5 generated
traffic.
Precinct 5 traffic volumes comprises between 9% to 16% of the total (all of the estate) ultimate traffic
volume travelling along the western and northern legs of Kings Forest Parkway, which would result in
an overall 0.4 to 0.8 dB increase of the traffic noise from the Precinct 5. In all cases the traffic noise
increases due to Precinct 5 derived traffic has resulted in less then 2 dB increase as recommended
within the NSW EPA “Environmental Criteria for Road Traffic Noise” (ECRTN).
Page 11
4.1.4 Ultimate Modeled Road Traffic Noise Levels Impacting Precinct 5 Dwellings
Road traffic noise predictions were conducted using PEN3D, which is a CoRTN based model.
As Kings Forest Parkway is yet to be constructed, model verification was unable to be undertaken.
From previous work conducted in NSW the PEN3D model is generally within the allowable 2 dB
deviation of the measured road traffic noise levels.
The following parameters were used in developing the PEN3D model for the development site:
2.5 dB(A) façade correction.
Recommended acoustic barrier treatments as detailed in Section 5.1.1.
60 km/hr posted speed limit on Kings Forest Parkway.
Dense graded asphalt surface (no road surface correction required).
ARRB correction for Australian conditions of -1.7 dB at façade and -0.7 dB free-field.
Finished ground levels provided by Mortons Urban Solutions in 3d dwg file format.
Ground Floor receiver heights taken at 1.8m above ground level.
First Floor receiver heights taken at 4.6m above ground level.
-3.5 dB(A) adjustment to the model to determine the LAeq 24hr from the LA10 18hr.
LAeq (15hr, 9hr, and 1hr) levels based upon the differences between the predicted LAeq 24hr levels
as detailed in Table 7 of Section 4.1.2.
Based upon ultimate traffic volumes, the PEN3D model predicts the following façade corrected traffic
noise levels as detailed in Table 10.
Predicted ultimate road traffic noise impacts at the nearest Precinct 5 lots to The Tweed Coast Road
(Tweed Coast Road carrying 22,396 vehicles per day (vpd) south of the Kings Forest Parkway
intersection (i.e. 57% of 23,852 vpd + 12,140 vpd) are as follows:
LAeq 15hr: 48 dB(A) Ground Floor Level 49 dB(A) Top Floor Level; and
LAeq 9hr: 39 dB(A) Ground Floor Level 40 dB(A) Top Floor Level.
The impact levels from The Tweed Coast Road are well below the noise criterion of 55 dB(A) LAeq 15hr
for the daytime period and 50 dB(A) LAeq 9hr for the night-time period due to a minimum separation
buffer distance of 500m from The Tweed Coast Road and the nearest residential receiver. For PEN
calculations refer to Appendix C of this report.
For the 12 existing dwelling lots fronting The Tweed Coast Road (i.e. directly to the north of the
intersection with Kings Forest Parkway) traffic noise impacts from the entire “Kings Forest” estate are
predicted to increase by 3.7 dB from the no development existing scenario. We recommend
construction of a 2.5m high acoustic barrier fronting The Tweed Coast Road to reduce the predicted
levels to within 2 dB of the noise criteria of 60 dB(A) LAeq 15hr and below the night-time criteria of
55 dB(A) LAeq 9hr. For PEN calculations refer to Appendix C.
Page 12
Receiver Location
Predicted Ultimate Kings Forest Parkway Traffic
Noise – Façade Corrected dB(A)
LAeq (24hr) LAeq (1hr) Daytime LAeq (1hr) Night time
Ground Floor Façades
Southern Lots Fronting Parkway 59 63 58
Southwestern Lots Fronting Parkway 58 62 57
Roundabout Setback South Lots Fronting Parkway 53 57 52
Roundabout Setback North Lots Fronting Parkway 53 57 52
Northwestern Lots Fronting Parkway 58 62 57
Northern Intersection Lots Fronting Parkway 58 62 57
Northern Lots Fronting Parkway 58 62 57
Northeastern Lots Fronting Parkway 58 62 57
Townhouse Site 49 53 48
Setback Southern near Townhouse Site 54 58 53
Setback Southern Lots 54 58 53
Setback Southwestern 52 56 51
Setback Northwestern 53 57 52
Setback Northern Lots 52 56 51
Setback Northeastern Lots 52 56 51
Central Parkland 46 50 45
Existing dwellings along Tweed Coast Road 54 58 53
First Floor Façades
Southern Lots Fronting Parkway 65 69 64
Southwestern Lots Fronting Parkway 63 67 62
Roundabout Setback South Lots Fronting Parkway 55 59 54
Roundabout Setback North Lots Fronting Parkway 55 59 54
Northwestern Lots Fronting Parkway 64 68 63
Northern Intersection Lots Fronting Parkway 63 67 62
Northern Lots Fronting Parkway 63 67 62
Northeastern Lots Fronting Parkway 63 67 62
Townhouse Site 51 55 50
Setback Southern near Townhouse Site 58 62 57
Setback Southern Lots 57 61 56
Setback Southwestern 54 58 53
Setback Northwestern 55 59 54
Setback Northern Lots 55 59 54
Setback Northeastern Lots 54 58 53
External Road Traffic Noise Criterion 60 55
Table 10: Predicted traffic noise impact levels at the Precinct 5 proposed development.
We note that for some lots predicted noise impacts are within 3 dB of the noise criterion. As the
average person cannot typically detect a 3 dB variation in sound pressure level a 3 dB exccedance of he
criterion is unlikely to cause annoyance and should be considered acceptable. We also note that for lots
setback from the roads (i.e. first floor levels with +3 dB of the criteria) additional screening will be
provided by the buildings fronting the roads, which has not been included in our assessment.
For PEN3D calculations and receiver locations refer to Appendix C of this report.
Page 13
4.2 Commercial Activity Noise: Impacting Noise Sensitive Receivers
Commercial activity noise from the future Town Centre Precinct and Community Facilities Precinct of
the “Kings Forest” Estate have been assessed to ensure acceptable noise amenity can be achieved at
the proposed residential lots within Precinct 5.
All noise source levels used in the assessment have been collected from similar previous investigations.
All noise levels have been corrected for impulsiveness or tonality as per Australian Standard
AS 1055:1997 – “Acoustics-Description and measurement of environmental noise”. The following
noise sources are typically associated with the operation of a Town Centre Precinct and Community
Facilities Precinct and have been assessed within this report:
Activity/Noise Source Noise Level, SPL LAeq dB(A)
Car door closure 78* dB(A) @ 1m
Car bypass at 5km/hr 57 dB(A) @ 3m
Children playing normally 60 dB(A) @ 1m
Children playing boisterously 80 dB(A) @ 1m
Patrons at alfresco dining area 75 dB(A) @ 1m
Goods delivery 85* dB(A) @ 1m
Waste collection 88* dB(A) @ 1m
Roof top commercial A/C unit 68** dB(A) @ \2m
Table 11: Typical noise source levels associated with a Town Centre and Community Facilities.
Based upon the location of the onsite lots (façades and inside rooms assuming open windows), we
predict the following noise impact levels from typically occurring activities from the future offsite
commercial sites as presented in Table 12. It is noted that the predicted level assume that the
recommended acoustic treatments as detailed in Section 5.2 are incorporated into the development.
Noise source
Predicted Noise Impact, SPL LAeq dB(A)
Nearest Façade to Development Inside with
Windows Open
Rw to Achieve
Criteria Inside
Ground floor level of future onsite dwellings fronting Kings Forest Parkway
Car door closure 39 32 N/A
Car bypass at 5km/hr 28 21 N/A
Children playing normally 21 <20 N/A
Children playing boisterously 41 34 N/A
Patrons alfresco dining area 36 29 N/A
Goods delivery 46 39 Refer Below
Waste collection 57 50 Refer Below
A/C Units 44 36 N/A
Top floor level of future onsite dwellings fronting Kings Forest Parkway
Car door closure 47 40 N/A
Car bypass at 5km/hr 36 29 N/A
Children playing normally 29 22 N/A
Children playing boisterously 49 42 N/A
Patrons alfresco dining area 44 37 N/A
Goods delivery 54 47 Refer Below
Waste collection 57 50 Refer Below
A/C Units 44 36 N/A
Criterion dB(A) 7am – 6pm: 55 / 6pm – 10pm: 50 Inside: 45
Table 12: Predicted noise impact from onsite noise sources at ground floor façades.
As waste collection and delivery activities are generally infrequent events and of short duration we
have not based our Rw requirements on these predicted impact levels.
Page 14
5.3 Onsite Construction Activity Noise: Impacting Offsite Receivers
Onsite construction activity noise source levels have been compiled from measurements taken from
similar previous investigations. All noise levels have been corrected for impulsiveness or tonality as
per Australian Standard AS 1055:1997 – “Acoustics-Description and measurement of environmental
noise”. The following plant and activities and noise source levels are likely to occur during the
proposed construction works:
Activity/Noise Source Noise Level SPL dB(A) Leq @ 1m
Concrete truck 88 dB(A)
Hammering 93*dB(A)
Electric hand tool 84** dB(A)
Truck unloading 83 dB(A)
Excavator 88 dB(A)
Cement vibrator 89 dB(A) * Denotes + 5 dB correction for impulsiveness in accordance with AS1055. ** Denotes + 5 dB correction for tonality in accordance with AS1055.
Table 13: Typical noise source levels associated with construction works.
Based upon the assumed noise source levels and the nearest existing dwellings along the Tweed Coast
Road, we predict the following noise impact levels at the nearest noise sensitive uses:
Noise source Predicted Noise Impact, SPL LAeq dB(A)
Kings Forest Parkway Construction Nearest Façade to Noise Source
Concrete Truck 26 – 60
Hammering 31 – 65
Electric Hand Tools 22 – 56
Truck Unloading 21 – 55
Excavator 26 – 60
Cement vibrator building shell 27 – 61
Precinct 5 Construction Nearest Façade to Noise Source
Concrete Truck 26 – 37
Hammering 31 – 42
Electric Hand Tools 22 – 33
Truck Unloading 21 – 32
Excavator 26 – 37
Cement vibrator building shell 27 – 38
Criterion dB(A) Residential: 60
Table 14: Predicted noise impact levels from construction activity at surrounding properties.
The above sources were located as close to, and as far away the receivers as possible. For point source
calculation sheets, refer to Appendix C of this report. This approach illustrates the effect of noise
sources that will move around a site during the construction process. The “Interim Construction Noise
Guideline” states that construction noise impacting above the noise limit criteria of RBL + 10 dB (for
residential properties) is the point that there may be some community reaction to noise, and that if noise
exceeds the criteria, that the proponent should apply all feasible and reasonable work practices to meet
the noise criteria. Construction noise impacts above 75 dB(A) represents the point that a strong
community reaction to noise may occur, and that restriction to work times to periods of lower
community noise sensitivity (e.g. limiting works generating more than 75 dB(A) to mid-morning or
mid-afternoons).
From the predicted levels above, the bulk of onsite activity will impact at within 1 dB, or below the
noise criteria, apart from hammering at road construction nearest the northern dwellings fronting the
Tweed Coast Road (as the average person cannot detect less than a 3 dB shift in sound pressure level,
we have assumed a 1 dB exceedance of the criteria is not significant).
Page 15
5.0 RECOMMENDED ACOUSTIC TREATMENTS
5.1 Road Traffic Noise Acoustic Treatments:
5.1.1 Acoustic Barriers
In-keeping with best practice noise mitigation measures and considering other planning constraints (i.e.
visual amenity, streetscape, loss of breezes, passive surveillance and the early morning and afternoon
shadows) we have recommended acoustic barriers along the Kings Forest Parkway frontage at
Precinct 5 to a height of 2.0m for the majority of the site and 2.1m at the southern end of the site
adjacent the southern roundabout (at Lots 59, 60 and 61 – refer to Appendix C of this report for the
adopted lot numbering).
The recommended location of the acoustic barriers is presented in Sketch 1 of Appendix A. Barriers
must be constructed above finished ground levels. Acoustic barriers must not have any gaps between
the barrier and the ground below. Typical materials include earth berms, 19mm lapped timber fence
(40% overlap), 6mm FC sheet, masonry, or a combination of the above (a minimum surface mass of
11kg/m2 is required).
It is noted that the barrier returns at the locations of the access pathways and road entry into Precinct 5
along the Kings Forest Parkway frontage have been designed to provide sufficient road traffic noise
mitigation to the adjacent and surrounding proposed residential lots. We have provided noise contour
results (refer over the page) for the entry locations to show the noise criterion in relation to the length
of the barrier returns.
As can be seen on the contour results over the page the barrier returns at the northern and southern path
access entries have been recommended to continue until the 60 dB(A) LAeq 1hr Daytime and 55 dB(A) LAeq
1hr Night-time contour lines have been reached. The minimum required lengths that the barrier returns need
to be constructed are also presented over the page.
For the road entry location, the barrier returns have been recommended to continue until the 61 dB(A)
LAeq 1hr Daytime and 56 dB(A) LAeq 1hr Night-time contour lines, which is within 1 dB of the external noise
criterion. As noted in Section 4.1.4, as the average person cannot typically detect a 3 dB variation in
sound pressure level a 1 dB exccedance of the criterion is unlikely to cause annoyance and should be
considered acceptable. Further, the barrier returns do not run the full length of the side boundaries of
the adjacent lots (i.e. to connect with the criterion contours line) as the future dwellings on the lots
would be set back from the eastern boundaries; with only non-noise sensitive uses such as driveways at
the eastern perimeters of the lots.
For the 12 existing dwellings fronting The Tweed Coast Road (i.e. directly to the north of Kings Forest
Parkway) we recommend construction of a 2.5m high acoustic barrier fronting The Tweed Coast Road
and Kings Forest Parkway to reduce the predicted traffic noise impacts to within 2 dB of The Tweed
Coast Road external criteria and below the Kings Forest Parkway criteria. Refer to Sketch 2 of
Appendix A for the barrier location.
Page 16
Northern Estate Entry (Not to Scale)
Southern Estate Entry (Not to Scale)
Road Entry (Not to Scale)
13m
16m
60 dB(A) LAeq 1hr Daytime and
55 dB(A) LAeq 1hr Night-time
60 dB(A) LAeq 1hr Daytime and
55 dB(A) LAeq 1hr Night-time
61 dB(A) LAeq 1hr Daytime and 56 dB(A) LAeq 1hr Night-time
Page 17
Precinct 5 Kings Forest Building Rw Indicative Acoustic Treatment
Space Component **Verify with supplier proposed element achieves required Rw**
Standard Building Construction:
Glazing 24 4mm glass in a standard grade frame
External Wall 33 - 35
Conventional timber stud framed wall, clad externally with 9mm thick timber or hardboards
or flat cellulose-cement sheets, and internally with 10mm thick plasterboard; or
conventional brick veneer construction
Roof / Ceiling 33 - 35 Conventional pitched roof with tiles or corrogated metal, over 10mm thick plasterbaord
Lots predicted to have TNR
values up to 25
5.1.2 Building Treatments
Based upon the ultimate road traffic noise modelling (Refer to Table 9 of Section 4.1.4), traffic noise
is predicted to exceed the external noise criterion at the above ground floor levels of future dwellings
within the nearest lots; hence further acoustic treatments are required to the top floor levels of two
storey dwellings.
To determine the extent of acoustic building shell treatments to top floor levels of dwellings,
assessment of habitable spaces (i.e. bedrooms and living/dining/kitchen areas) should be undertaken
in accordance with Australian Standard AS3671:1989 “Acoustics – Road traffic noise intrusion –
Building Siting and Construction” to achieve the “maximum” internal noise levels prescribed in
AS/NZS 2107:1987 “Acoustics – Recommended Design Sound Level and Reverberation Times for
Building Interiors” – refer to Table 2 of Section 3.1.
Based upon predicted impact levels at lot building façades (refer to Table 10 of Section 4.1.4), the
TNR values (Traffic Noise Reduction) as defined in AS3671:1989 are as follows:
Table 12: TNR values for above ground level noise affected habitable rooms.
TNR values between 10 and 25 (Refer to Table 12) are considered as Construction Category 2 within
AS3671:1989, which is defined as follows:
“Standard construction, except for lightweight elements such as fibrous cement or metal
cladding or all glass façades. Windows, doors and other openings must be closed.”
Australian Standard AS3671:1989 also provides guidance on standard building construction for those
lots with TNR values between 10 and 25:
Table 13: Standard Building Shell Treatments.
Hence, to achieve the internal noise criterion at the above ground level noise affected habitable rooms
(i.e. living areas and bedrooms) of future dwellings on lots fronting Kings Forest Parkway (refer to
Table 12) standard construction is likely to be sufficient. To ensure compliance with the internal
noise criterion we recommend that additional noise assessments be conducted once building plans are
finalised. Assessment of habitable rooms should be undertaken in accordance with Australian
Standard AS3671:1989 “Acoustics – Road traffic noise intrusion – Building Siting and Construction”
to achieve the maximum internal noise levels prescribed in AS/NZS 2107:1987 “Acoustics –
Recommended Design Sound Level and Reverberation Times for Building Interiors”.
To allow occupants to close windows and doors and still have a supply of fresh air, provision of air
conditioning or sealed mechanical ventilation is required to noise affected habitable rooms.
Impact Criteria TNR
dB(A) dB(A) dB(A)
Lots Fronting Parkway First Floor Living Areas Fronting Parkway 67 - 69 45 22 - 24
Lots Fronting Parkway First Floor Bedrooms Fronting Parkway 62 - 64 40 22 - 24
Receiver Space
Page 18
5.2 Recommended Acoustic Treatments for Offsite Commercial Activity
Based upon the assumed commercial noise source levels, the following acoustic treatments and
management principles are recommended to mitigate offsite commercial noise emissions:
Construction of the acoustic barriers as detailed in Sketch 1 of Appendix A (also recommended
in Section 5.1.1 for road traffic noise mitigation).
5.3 Construction Noise
The following treatments and practices are recommended to manage noise from the construction
phase of the development of Precinct 5:
The “Interim Construction Noise Guideline” sets restrictions to construction works to the
following times:
o Monday – Friday: 7 am – 6pm
o Saturday: 8 am – 1 pm
o Sundays & Public Holidays: not allowable
A noise management plan is implemented (An example plan is provided in “Attachment B” of
Appendix A).
Contact occupants of the existing dwellings fronting the Tweed Coast Road at the earliest
possible time before any site work begins the nature of the construction stages and the duration
of noisier activities (e.g. cement vibrating).
Ensure that all equipment is in good working order, and that mobile plant commence work as far
from the dwellings as possible in the mornings.
Locate fixed plant as far from neighbouring property boundaries as possible (e.g. power units for
cement vibrators be located as far from property boundaries as possible).
Locate fixed plant behind buildings or materials stockpiles to take advantage of acoustical
screening from physical barriers.
Page 19
6.0 DISCUSSION
6.1 Road Traffic Noise
Based upon ultimate volumes, road traffic noise levels are predicted to impact the proposed subdivision
at levels above the adopted road traffic noise criterion; hence acoustic treatments are required. This
assessment has explored available acoustic treatment options which are suitable (reasonable and
achievable) for the development site and has provided recommendations for a balanced acoustic
treatment outcome as a balanced treatment strategy is supported by both the ECRTN (refer to Section
3.6 of the document); and the NSW Department of Planning document “Development near Rail
Corridors and Busy Roads – Interim Guideline” (refer to Section 3.8 of the document).
For ground floor level façades and outdoor recreation areas we have recommended the construction of
acoustic barriers.
The adopted criterion has been sourced from the NSW EPA “Environmental Criteria for Road Traffic
Noise” (ECRTN). We note that the above criterion also refers to internal layouts, building materials
and construction as methods for minimising road traffic noise impacts. For building façades predicted
to be affected by traffic noise above the external noise criterion, acoustic treatments are likely to be
limited to standard building shell construction at future dwellings (i.e. Traffic Noise Reduction values
between 10 and 25).
To ensure compliance with the internal noise criterion at above ground floor levels of dwellings on lots
affected by road traffic noise (presented in Table 10), additional assessments will need to be undertaken
in accordance with AS3671:1989 to show that the “Maximum” internal noise levels defined in
AS/NZS 2107:1987 can be achieved at the noise affected habitable rooms. For noise affected habitable
rooms, provision of air conditioning or sealed mechanical ventilation is required to allow occupants to
close windows and doors.
Final acoustic recommendations which include acoustic barriers, acoustic building shell treatments and
appropriate locations of private open recreation spaces not only provide a balance of reasonable and
achievable options but is also considered the preferred option for the following site specific reasons:
The development provides for a mixture of dwelling product types.
Lots requiring upgraded building shell treatments are limited to first floor levels of dwellings
fronting Kings Forest Parkway.
A barrier higher than 2.0m to 2.1m along the road frontage would have negative impacts on other
urban planning issues such as visual amenity, streetscape, loss of breezes, passive surveillance and
the early morning and afternoon shadows cast by such a barrier.
The recommended treatments are generally considered acceptable and this consultancy have
undertaken a number of similar developments in Northern New South Wales which have had
similar approved recommended acoustic treatments.
The increases in traffic volume on the local roads due to the completed Precinct 5 development are
predicted to increase noise levels at, or less than 2 dB(A) which is within the requirements of the NSW
RTA’s “Environmental Criteria for Road Traffic Noise”. For the 12 existing dwellings fronting The
Tweed Coast Road (i.e. directly to the north of Kings Forest Parkway) we recommend construction of a
2.5m high acoustic barrier fronting The Tweed Coast Road and Kings Forest Parkway to reduce the
predicted levels to within 2 dB of The Tweed Coast Road noise criteria; and below the Kings Forest
Parkway criteria.
Page 20
6.2 Offsite Commercial Noise
Based upon the assumed noise source levels and recommended acoustic treatments, noise impacts at
the ground floor and first floor level residential building façades are predicted to be within the daytime
and evening-time “Background +” external criterion and the adopted internal limit of 45 dB(A) with
the exception of waste collection and deliveries.
We note that most commercial operations (including schools) operate generally within the daytime and
evening hours (i.e. between 7am and 10pm). Outside these hours residential occupants are typically
inside their dwellings; therefore adopted internal noise limit applies.
The predicted levels are generally below the noise criterion given that the commercial noise sources are
located across the Kings Forest Parkway road corridor to the dwelling receiver, which provides a buffer
distance of approximately 45m.
With regards to waste collection and deliveries, given that such activities are generally infrequent and
of short duration such activities are unlikely to cause annoyance.
The recommended acoustic treatments for road traffic noise mitigation (i.e. acoustic barrier along the
Kings Forest Road frontage and building shell treatments) will provide additional mitigation of future
commercial activities surrounding the Precinct 5 development.
We also note the future commercial sites will require an acoustic assessment prior to Council approval.
The assessment would be undertaken once development plans have been finalized for the commercial
sites, and likely commercial tenancies determined. The outcomes off the acoustic assessment would
provide more detailed acoustic treatments to mitigate commercial noise emissions to the Precinct 5
residential development.
6.2 Construction Noise
The bulk of the construction activity likely to be undertaken onsite is predicted to impact around the
“RBL + 10 dB” criteria.
Through management of activities, particularly those activities occur in close proximity to the nearest
existing dwellings, the potential for noise annoyance will be reduced significantly.
A key component in managing noise annoyance from construction works is communication with
neighbouring property owners – if the Builder gives sufficient notification to the occupants of
neighbouring properties when noisy activity is going to occur, agreeable times for these types of
activity can be set, and will also give the neighbours a sense that their rights are being respected.
Page 21
7.0 CONCLUSIONS
This report is in response to a request by Project 28 Pty Ltd for an environmental noise impact
assessment of the proposed “Kings Forest” Estate, Stage 1 Project Application at Cudgen, Northern
NSW.
Overall, the proposed development will generally be within acceptable levels of the adopted criterion,
subject to the acoustic treatments recommended in Section 5 being integrated into the design,
construction and operation of the development.
Report Reviewed By:
Report Compiled by:
JAY CARTER BSc
Director
Matthew Lopez BEng
Consultant
Page 22
APPENDIX A
Attachments, Subject Site and Recommended Acoustic Barriers
Page 23
Attachment A: Australian Standard AS1055.2-1997 Appendix A
Page 24
Figure 1: Subject site Location (Google Maps).
Precinct 5
Page 25
Sketch No. 1: Precinct 5 Site Layout and Recommended Acoustic Barriers (Not to Scale).
ACOUSTIC BARRIER LEGEND
Recommended location of 2.0m high
solid acoustic barriers
Recommended location of 2.1m high
solid acoustic barriers
16m barrier return
16m barrier return
13m barrier returns
Location of 2.1m high
acoustic barrier
Page 26
Sketch No. 2: Tweed Coast Road Existing Dwellings and Recommended Acoustic Barriers (Not to Scale).
ACOUSTIC BARRIER LEGEND
Recommended 2.5m high acoustic barrier constructed above finished ground. Barriers are to be constructed free of gaps
and holes. Typical materials include earth berms, 19mm lapped timber fence (40% overlap), 6mm FC sheet, masonry, or
a combination of the above (a minimum surface mass of 11kg/m2 is required).
Page 27
Attachment B: CONSTRUCTION NOISE MANAGEMENT PLAN
CONSTRUCTION NOISE MANAGEMENT PLAN
CONTROL STRATEGY
Australian Standard AS 2436 – 1981 “Guide to noise control on construction, maintenance and
demolition sites”, states that control of noise emissions from construction sites can be broken
down into 2 broad strategies as follows:
Control of noise at source;
Controlling the spread of noise (control in noise path).
By employing both aspects of the above, emissions can be minimised as much as is practical.
Strategies
The construction firm shall observe the following treatments and principles to manage potential
noise impacts:
a) No works are conducted outdoors before 7 a.m. or after 6. p.m. Monday to
Saturday, or any time on a Sunday or public holiday should be avoided. In
special cases, if the time restrictions cannot be met, the construction manager
should contact Council for a temporary relaxation of the time restriction. In such
cases, it would be necessary to notify all potentially affected residents that out of
hours work will be conducted, and the times for such works.
b) Commence earthworks in the mornings as far from the residential premises as is
possible.
c) Maintenance of equipment. Regular maintenance of stationary and mobile
equipment, including off-site vehicles. By maintaining equipment, noise
emissions from older equipment will be similar to that of new equipment.
d) Install residential mufflers on earthmoving equipment.
e) Use and siting of equipment. By locating noisy equipment as far away from
noise sensitive premises as is practical, distance separation will reduce potential
noise impacts. Unloading building materials should be conducted as far away
from noise sensitive premises as possible.
f) Assign the task of managing noise emissions to a person (the ‘responsible
person’) that is likely to be present on-site most of the time that activity is
occurring. This person would be responsible for handling noise complaints
sensitively, and ensuring that work does not commence before the times specified
in Section 6 above. The name and contact details of the ‘responsible person’
shall be displayed outside the principal construction office.
g) Encouraging workers to not congregate outside the site before 6.45 a.m.
h) If complaints arise regarding noise, the complaint will be directed to the
‘responsible person’, who will determine the source of the noise, and take
immediate steps to mitigate the noise. This may involve moving the noise source
further away from affected premises, replacing the equipment, or in some cases,
engaging a qualified acoustic consultant to provide specialist control advice.
Performance Indicators
The performance indicator adopted is that the site is not the subject of noise complaints.
Page 28
APPENDIX B
Development Plan
Pag
e 29
Page 30
APPENDIX C
Model Calculations / Predictions
Page 31
POINT CALCULATIONS
Pen3D2000 V 1.9.11
Project Code:09371a
Project Description:Noise assessment of Kings Forest P5 File:Z:\CRG ACOUSTICS\ACOUSTIC JOBS\09371a Kings Forest Tweed\09371a_pen\09371a_ultimate August 2012.PEN
File Description:Data file covering Ultimate
Wednesday 15 Aug, 2012 at 13:19:41
CoRTN Calculations
All road segments included. Segmentation angle: 10degrees. Road elevations apply. Receptor X Posn Y Posn Height Leq(24hour)
(m) (m) (m) (dB(A))
1 54804.8 70455 1.8 57.7 2 54791.1 70446.6 1.8 57.8
3 54779.2 70439.3 1.8 58
4 54768.4 70431.9 1.8 57.8 5 54756.5 70424.9 1.8 58.1
6 54746.2 70418.1 1.8 58
7 54733.7 70410.2 1.8 58.1 8 54720.6 70401.5 1.8 58
9 54708.4 70393.9 1.8 58
10 54698.3 70387.2 1.8 57.8 11 54687 70381.1 1.8 57.9
12 54673.6 70374.2 1.8 57.8
13 54658.8 70367.5 1.8 57.8 14 54642.9 70361 1.8 57.8
15 54627.9 70356 1.8 57.8 16 54614.3 70352.2 1.8 57.8
17 54599.6 70348.7 1.8 57.7
18 54583.4 70344.7 1.8 57.7 19 54568.3 70341.7 1.8 57.9
20 54556.8 70339.3 1.8 57.9
21 54543.3 70335.8 1.8 57.8 22 54527.8 70330.2 1.8 57.6
23 54513.7 70322.4 1.8 57.5
24 54502.2 70314.1 1.8 57.5 25 54490.9 70303.3 1.8 57.9
26 54470 70272.2 1.8 58
27 54464 70257.4 1.8 58.1
28 54461.8 70244.9 1.8 57.7
29 54459.5 70231.4 1.8 57.6
30 54457.8 70219.2 1.8 57.3 31 54455.6 70206.4 1.8 57.3
32 54453.7 70194.5 1.8 57.3
33 54451.5 70179.7 1.8 57.1 34 54448.1 70158.1 1.8 57.1
35 54446.1 70144.1 1.8 57.3
36 54445.3 70081 1.8 57.2 37 54445.3 70068.1 1.8 57.4
38 54445.8 70053.1 1.8 57.5
39 54446.2 70037.1 1.8 57.6 40 54446.5 70024 1.8 57.9
41 54446.5 70011.7 1.8 58.1
42 54446.6 69999.5 1.8 58.4 43 54446.8 69984.3 1.8 58.3
44 54447.2 69967.3 1.8 58
45 54447.4 69952 1.8 57.7 46 54447.8 69938.4 1.8 57.6
47 54447.8 69925.9 1.8 57.3
48 54446.5 69910.8 1.8 57.2 49 54443.8 69893.3 1.8 57.1
50 54440.4 69877.4 1.8 57.2
51 54437.6 69865.4 1.8 57 52 54433.7 69855.5 1.8 57.4
53 54418.7 69818.8 1.8 57.6
54 54410 69803.3 1.8 57.9 55 54397.2 69783.4 1.8 58.1
56 54383.6 69766.3 1.8 58.4
57 54369.6 69752.7 1.8 58.5 58 54358.5 69743.6 1.8 58.8
59 54347.3 69736.6 1.8 58.8
60 54334.3 69728.6 1.8 59.2 61 54315.5 69717 1.8 59.1
62 54316 69700.9 1.8 57
63 54321 69680.8 1.8 54.7
Page 32
64 54322 69667.7 1.8 53.8
65 54321.6 69654.2 1.8 54.4
66 54320.2 69612 1.8 51.8
67 54320.1 69596.9 1.8 51 68 54319.7 69584.1 1.8 50.5
69 54318.9 69572.1 1.8 50
70 54318.3 69559.5 1.8 49.5 71 54318 69545.2 1.8 48.8
72 54321.7 69529.4 1.8 48.2
73 54330.5 69513.8 1.8 47.5 74 54355.9 69508.8 1.8 47.1
75 54790.6 70394.7 1.8 52
76 54773.7 70383.6 1.8 51.8 77 54760.3 70375.1 1.8 51.8
78 54722.2 70351.7 1.8 51.4
79 54696.2 70338.7 1.8 51.4 80 54660.4 70321.8 1.8 51.2
81 54646.1 70317.5 1.8 51.3
82 54627.2 70312 1.8 51.3 83 54591 70302.6 1.8 51.6
84 54578.7 70299.6 1.8 51.7
85 54564 70296.7 1.8 51.8 86 54552.6 70293.8 1.8 52
87 54523 70274.3 1.8 52
88 54507.7 70262.9 1.8 52.7 89 54498.3 70226.1 1.8 52
90 54493.7 70192.6 1.8 51.8 91 54482.6 70143.4 1.8 53
92 54485.9 70088.1 1.8 52.8
93 54487.8 70057.2 1.8 51.6 94 54487.8 70043.2 1.8 51.6
95 54490.4 70010.3 1.8 51.5
96 54491.4 69993.7 1.8 51.6 97 54491.1 69972.9 1.8 51.5
98 54492.3 69928.9 1.8 51.3
99 54490.7 69908.7 1.8 51.4 100 54483.9 69859.9 1.8 51.3
101 54479.3 69844 1.8 51.5
102 54454.9 69813.1 1.8 52.5
103 54443.5 69792.2 1.8 52.9
104 54436.7 69779.5 1.8 53.1
105 54430.8 69768.5 1.8 53.2 106 54423.3 69755.4 1.8 53.4
107 54414.8 69742.4 1.8 53.5
108 54407 69730.7 1.8 52.9 109 54398.6 69720 1.8 52.7
110 54389.8 69711.8 1.8 52.4
111 54378.4 69703.4 1.8 52.5 112 54370.2 69694.3 1.8 52
113 54366 69676.7 1.8 51.5
114 54365.4 69653.6 1.8 50.8 115 54364.4 69608 1.8 50.4
116 54364 69593 1.8 50
117 54363.7 69577.1 1.8 49.3 118 54281.4 69531.5 1.8 48.8
central park 54696.5 70171.9 1.5 46.3
1 54804.8 70455 4.6 63.2
2 54791.1 70446.6 4.6 63.3
3 54779.2 70439.3 4.6 63.4 4 54768.4 70431.9 4.6 63.3
5 54756.5 70424.9 4.6 63.4
6 54746.2 70418.1 4.6 63.4 7 54733.7 70410.2 4.6 63.4
8 54720.6 70401.5 4.6 63.2
9 54708.4 70393.9 4.6 63.2 10 54698.3 70387.2 4.6 63.1
11 54687 70381.1 4.6 63.2
12 54673.6 70374.2 4.6 63.1 13 54658.8 70367.5 4.6 63.1
14 54642.9 70361 4.6 63.1
15 54627.9 70356 4.6 63 16 54614.3 70352.2 4.6 63
17 54599.6 70348.7 4.6 62.9
18 54583.4 70344.7 4.6 63
Page 33
19 54568.3 70341.7 4.6 63.1
20 54556.8 70339.3 4.6 63.2
21 54543.3 70335.8 4.6 63.2
22 54527.8 70330.2 4.6 63.3 23 54513.7 70322.4 4.6 63.2
24 54502.2 70314.1 4.6 63.1
25 54490.9 70303.3 4.6 63.1 26 54470 70272.2 4.6 63.5
27 54464 70257.4 4.6 63.7
28 54461.8 70244.9 4.6 63.3 29 54459.5 70231.4 4.6 63.1
30 54457.8 70219.2 4.6 62.9
31 54455.6 70206.4 4.6 63 32 54453.7 70194.5 4.6 62.9
33 54451.5 70179.7 4.6 62.9
34 54448.1 70158.1 4.6 63 35 54446.1 70144.1 4.6 63.4
36 54445.3 70081 4.6 62.8
37 54445.3 70068.1 4.6 62.3 38 54445.8 70053.1 4.6 62.3
39 54446.2 70037.1 4.6 62.3
40 54446.5 70024 4.6 62.3 41 54446.5 70011.7 4.6 62.4
42 54446.6 69999.5 4.6 62.5
43 54446.8 69984.3 4.6 62.6 44 54447.2 69967.3 4.6 62.6
45 54447.4 69952 4.6 62.5 46 54447.8 69938.4 4.6 62.4
47 54447.8 69925.9 4.6 62.2
48 54446.5 69910.8 4.6 62.2 49 54443.8 69893.3 4.6 62.3
50 54440.4 69877.4 4.6 62.4
51 54437.6 69865.4 4.6 62.3 52 54433.7 69855.5 4.6 62.5
53 54418.7 69818.8 4.6 62.5
54 54410 69803.3 4.6 62.6 55 54397.2 69783.4 4.6 62.7
56 54383.6 69766.3 4.6 62.9
57 54369.6 69752.7 4.6 62.9
58 54358.5 69743.6 4.6 63.3
59 54347.3 69736.6 4.6 63.6
60 54334.3 69728.6 4.6 64.2 61 54315.5 69717 4.6 65.4
62 54316 69700.9 4.6 62.7
63 54321 69680.8 4.6 59.7 64 54322 69667.7 4.6 58.2
65 54321.6 69654.2 4.6 56.8
66 54320.2 69612 4.6 54 67 54320.1 69596.9 4.6 53.1
68 54319.7 69584.1 4.6 52.5
69 54318.9 69572.1 4.6 52 70 54318.3 69559.5 4.6 51.4
71 54318 69545.2 4.6 50.8
72 54321.7 69529.4 4.6 50.1 73 54330.5 69513.8 4.6 49.5
74 54355.9 69508.8 4.6 49
75 54790.6 70394.7 4.6 54.4 76 54773.7 70383.6 4.6 54.3
77 54760.3 70375.1 4.6 54.3
78 54722.2 70351.7 4.6 53.9 79 54696.2 70338.7 4.6 53.7
80 54660.4 70321.8 4.6 53.5
81 54646.1 70317.5 4.6 53.7 82 54627.2 70312 4.6 53.8
83 54591 70302.6 4.6 54.1
84 54578.7 70299.6 4.6 54.3 85 54564 70296.7 4.6 54.5
86 54552.6 70293.8 4.6 54.6
87 54523 70274.3 4.6 54.5 88 54507.7 70262.9 4.6 55.3
89 54498.3 70226.1 4.6 54.3
90 54493.7 70192.6 4.6 54 91 54482.6 70143.4 4.6 55.3
92 54485.9 70088.1 4.6 55
93 54487.8 70057.2 4.6 54.2
Page 34
94 54487.8 70043.2 4.6 54.3
95 54490.4 70010.3 4.6 54
96 54491.4 69993.7 4.6 54.2
97 54491.1 69972.9 4.6 54.1 98 54492.3 69928.9 4.6 53.9
99 54490.7 69908.7 4.6 54
100 54483.9 69859.9 4.6 54 101 54479.3 69844 4.6 54.3
102 54454.9 69813.1 4.6 55.9
103 54443.5 69792.2 4.6 56.6 104 54436.7 69779.5 4.6 56.6
105 54430.8 69768.5 4.6 56.7
106 54423.3 69755.4 4.6 56.9 107 54414.8 69742.4 4.6 56.9
108 54407 69730.7 4.6 56.9
109 54398.6 69720 4.6 57 110 54389.8 69711.8 4.6 57.1
111 54378.4 69703.4 4.6 57.4
112 54370.2 69694.3 4.6 56.9 113 54366 69676.7 4.6 56.1
114 54365.4 69653.6 4.6 54.8
115 54364.4 69608 4.6 52.6 116 54364 69593 4.6 52
117 54363.7 69577.1 4.6 51.3
118 54281.4 69531.5 4.6 50.6
existing dwelling TCR 3 55179.5 70816.5 1.8 50.3 existing dwelling TCR 1 55207.5 70754.7 1.8 53.7
existing dwelling TCR 2 55190.6 70802.3 1.8 51.3
POINT CALCULATIONS
Pen3D2000 V 1.9.11 Project Code:09371a
Project Description:Noise assessment of Kings Forest P5
File:Z:\CRG ACOUSTICS\ACOUSTIC JOBS\09371a Kings Forest Tweed\09371a_pen\09371a_ultimate coast road 2012.PEN File Description:Data file covering ultimate coast road only
Thursday 16 Aug, 2012 at 14:59:17
CoRTN Calculations
All road segments included. Segmentation angle: 5degrees. Road elevations apply.
Receptor X Posn Y Posn Height Leq(24hour) (m) (m) (m) (dB(A))
Coast Rd GF 54876.9 70136.7 1.8 46.0
Coast Rd FF 54876.1 70136.7 4.6 47.2
Existing dwelling existing traffic 55215.2 70812.5 1.5 59.8
Existing dwelling ultimate no barrier 55215.2 70812.5 1.5 63.5 Existing dwelling ultimate 2.5m barrier 55215.2 70812.5 1.5 60.2
Page 35
Lot Numbering Sketch
Northeastern Lots Fronting
Northeastern Lots Setback
Northern Lots Fronting
Northern Lots Setback
Northern Intersection Lots
Northwestern Lots Fronting
Northwestern Lots Setback
Southwestern Lots Fronting Southwestern Lots Setback
Southern Lots Setback
Southern Lots Fronting
Southern Roundabout Lots
Northern Roundabout Lots
Townhouse Lot
Southern Lots near Townhouse Site
Page 36
Kings Forest Parkway (northern leg) Kings Forest Parkway (western leg)
Daytime without Precint 5 Daytime without Precint 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds 15 seconds
3600 seconds per 1 hour 3600 seconds per 1 hour
1997 number of cars per hour 1997 number of cars per hour
SEL total SEL total
SEL x number of cars = 23797676748 103.76535 SEL x number of cars = 23797676748 103.76535
LAeq 1hr = 70.7 dB(A) at 10m -0.8 LAeq 1hr = 70.7 dB(A) at 10m
Night-time without Precint 5 Night-time without Precint 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds 15 seconds
3600 seconds per 1 hour 3600 seconds per 1 hour
599 number of cars per hour 599 number of cars per hour
SEL total SEL total
SEL x number of cars = 7139303024 98.536558 SEL x number of cars = 7139303024 98.536558
LAeq 1hr = 65.5 dB(A) at 10m -0.8 LAeq 1hr = 65.5 dB(A) at 10m
Daytime with Precinct 5 Daytime with Precinct 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds 15 seconds
3600 seconds per 1 hour 3600 seconds per 1 hour
2385 number of cars per hour 2191 number of cars per hour
SEL total SEL total
SEL x number of cars = 28419475582 104.53616 SEL x number of cars = 26109171911 104.16793
LAeq 1hr = 71.5 dB(A) at 10m LAeq 1hr = 71.1 dB(A) at 10m
Night-time with Precinct 5 Night-time with Precinct 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds 15 seconds
3600 seconds per 1 hour 3600 seconds per 1 hour
716 number of cars per hour 657 number of cars per hour
SEL total SEL total
SEL x number of cars = 8525842675 99.307373 SEL x number of cars = 7832751573 98.939144
LAeq 1hr = 66.2 dB(A) at 10m LAeq 1hr = 65.9 dB(A) at 10m
The Tweed Coast Road -7.0441019 distance reduction from 10m to 40m
Daytime without Precint 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
54000 seconds per 15 hour
11290 number of cars per 15 hour
SEL total
SEL x number of cars = 1.34522E+11 111.28793
LAeq 15hr = 59.4 dB(A) at 40m
Night-time without Precint 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
32400 seconds per 9 hour
850 number of cars per 9hour
SEL total
SEL x number of cars = 10125302008 100.05408
LAeq 15hr = 50.4 dB(A) at 40m
Daytime with Precinct 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
54000 seconds per 15 hour
14898 number of cars per 15 hour
SEL total
SEL x number of cars = 1.77505E+11 112.4921
LAeq 15hr = 60.6 dB(A) at 40m
Night-time with Precinct 5
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
32400 seconds per 9 hour
1121 number of cars per 9hour
SEL total
SEL x number of cars = 13360561192 101.25825
LAeq 15hr = 51.6 dB(A) at 40m
Noise Descriptors at North leg of Parkway
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
86400 seconds per 24 hour
19973 number of cars per hour
SEL total
SEL x number of cars = 2.37977E+11 113.76535
LAeq 24hr = 66.9 dB(A) at 10m
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
54000 seconds per 15 hour
18575 number of cars per 15 hour
SEL total
SEL x number of cars = 2.21318E+11 113.45018
LAeq 15hr = 68.6 dB(A) at 10m
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
32400 seconds per 9 hour
1398 number of cars per 9hour
SEL total
SEL x number of cars = 16658373724 102.21633
LAeq 9hr = 59.6 dB(A) at 10m
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
3600 seconds per 1 hour
1997 number of cars per hour
SEL total
SEL x number of cars = 23797676748 103.76535
Day LAeq 1hr = 70.7 dB(A) at 10m
Car pass LAeq 59.0 794328.2347 11914924 70.8 SEL at 10m
15 seconds
3600 seconds per 1 hour
599 number of cars per hour
SEL total
SEL x number of cars = 7139303024 98.536558
Night LAeq 1hr = 65.5 dB(A) at 10m
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