TNAG-1613-FCO40-2221-Executive-Council-of-Hong-Kong-memoranda-and-minutes-of-meet-1987 — Page 241

TABLE OF CONTENTS

Page No.

1.

PRELIMINARY

1.1

Citation and Commencement

1.2

Application and Scope

1.3

Interpretation

1.4

General Introduction to the Procedures

2.

DETERMINATION OF THE PERMITTED HOURS OF

OPERATION FOR PERCUSSIVE PILING WORKS

2.1

J

Step 1 Location of the Most Affected Noise

Sensitive Receiver (NSR)

Determination of the Acceptable

1

1

1

3

4

2.2

Step 2

4

Noise Level (ANL) for the Noise Sensitive Receiver (NSR)

2.3

Step 3

Sound Power Levels for Percussive Piling

5

2.4

Step 4

Summation of Noise Levels

5

2.5

Step 5

Distance Attenuation

5

2.6

Step 6

Corrections for the Effect of Barriers

5

2.7

Step 7

Correction for Acoustic Reflections

6

2.8

Step 8

Corrected Noise Level (CNL) at the Noise Sensitive Receiver (NSR)

6

2.9

Step 9

Determination of the Permitted Hours of Operation

6

2.10 Step 10 Construction Noise l'ermit (CNP) Issuing

7

Procedure

3.

PROVISIONS FOR SPECIAL CASES

3.1

3.2

Quiet Working Methods or Other Special Factors

Percussive Piling Work Having Important Social Implications

7

7

TESTING FOR COMPLIANCE WITH CONSTRUCTION NOISE PERMIT CONDITIONS RELATING TO MAXIMUM NOISE LEVELS

8

ANNEX

-

GENERAL CALIBRATION AND MEASUREMENT PROCEDURES