environmental noise impact report

Kings Forest Stage 1 Project Application

ENVIRONMENTAL NOISE IMPACT REPORT

Prepared for:

Project 28 Pty Ltd

24 August 2012 crgref: 09371a report rev.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.

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.

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.

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”.

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.

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.

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.

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

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).

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.

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.

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.

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).

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.

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

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

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.

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.

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.

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

APPENDIX A

Attachments, Subject Site and Recommended Acoustic Barriers

Attachment A: Australian Standard AS1055.2-1997 Appendix A

Figure 1: Subject site Location (Google Maps).

Precinct 5

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

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).

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.

APPENDIX B

Development Plan

Pag

e 29

APPENDIX C

Model Calculations / Predictions

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

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

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

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

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

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





SEL total SEL total


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





SEL total SEL total


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





SEL total SEL total


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


15 seconds


850 number of cars per 9hour

SEL total

SEL x number of cars = 10125302008 100.05408


Daytime with Precinct 5


15 seconds



SEL total



Night-time with Precinct 5


15 seconds



SEL total



Noise Descriptors at North leg of Parkway


15 seconds


19973 number of cars per hour

SEL total




15 seconds



SEL total




15 seconds



SEL total




15 seconds



SEL total


Day LAeq 1hr = 70.7 dB(A) at 10m


15 seconds



SEL total


Night LAeq 1hr = 65.5 dB(A) at 10m

environmental noise impact report

Documents