07/2398 - Request for information response [As Published] · 132007.2398

2

ask
4 Existing Noise Levels

Road traffic noise levels were measured in 2007 at location NMI'. The noise level monitoring
methodology was checked by ASK and found to be adequate.

ASK Consulting Engineers carried out attended and unattended noise monitoring at location NM2 to
determine current noise levels due to passing trains.

Figure 3.1 shows the noise monitoring locations. Both are on the boundary of the subject site with
the Cooroy Connection Road coridor, with location NMI and location NM2 being respectively
approximately 140m and 220m north of the southwestern comer of the subject site.

4.1 Road Traffic Noise Levels

The noise monitoring at location NMI was carried out on Wednesday 4 July 2007 and Thursday 5 .
July 2007. A summary of the results obtained is presented in Table 4.1. , {

Table 4.1. Measured Noise Levels 04/07/07 — 05/07/07 in dB(A) at Location
NMI

 

 

 

Lio(I8hour) | L90(i8hour) | Le0(8hour) | Leq(24hour) | Maximum | Maximum |
Leq( | hour) Lto(i hour) .
day : #
645 47.1 335 616 647 676

 

 

 

 

 

 

 

The noise parameters are defined as follows:

Lio the noise level exceeded 10% of the time;

L90 the noise level exceeded 90% of the time, and commonly referred to as the
background noise level:

L10(|8hour) the average of the hourly L10 noise levels between 6:00am and midnight;

L90(1 8hour)
L90(1 8hour)

' Air Noise Environment Report Proposed RSL Retirement Village Cooroy — Road and Rail Noise Assessment (Revised)
Project Reference: 1750, dated August 2008

the average of the hourly L90 noise levels between 6:00am and midnight;
the average of the hourly L90 noise levels between 10:00pm and 6:00am;

Page 4

4991 ROIVOI.doc Proposed RSL Care Retirement Village Cooroy RSL Care : @