Step 11 - Corrections for Acoustic Reflections

In cases where the NSR is a building, a positive correction of 3 dB(A) shall be applied to the PNL obtained in Step 9.

An additional positive correction of up to 3 dB(A) may be applied to the PNL in cases where the Authority considers that noise levels at the NSR will be increased due to the confined or reverberant nature of the immediate locality of the construction site or the NSR.

Step 12 - Corrected Noise Level (CNL) at the Noise Sensitive Receiver (NSR)

The corrections obtained in Steps 10 and 11 shall be applied to the PNL obtained in Step 9 to give the CNL at the NSR.

Step 13 - Construction Noise Permit (CNP) Issuing Procedure

The CNL at the NSR obtained in Step 12 shall be compared with the ANL obtained in Step 6. If the CNL is equal to or less than the ANL the CNP may be issued. If the CNL is greater than the ANL the CNP shall not be issued unless the application is a special case as defined in Section 3. The procedures detailed in Section 3 shall then be followed.

When giving consideration to the renewal of CNPs pursuant to section 8 of the Ordinance the Authority may impose additional conditions or may refuse to renew a CNP having regard to complaints received and other relevant factors, notwithstanding the procedures and guidelines detailed in Steps 1 to 12.

To assist in enforcement procedures the Authority may include as a condition for all CNPs a requirement for the CNP applicant to ensure that each item of PME which is permitted to be used on the construction site is, at the time of its use, labelled in a legible and conspicuous manner with the appropriate identification code as shown in Table 3. For items not given in Table 3 the identification code to be used shall be as specified by the Authority in the CNP.