A Guide to Good CNP Submission (original) - epd.gov.hk · Construction Noise Permit (GW)...

A Guide to Good CNP Submission

W. K. WONGEnvironmental Protection Department

CNP Processing TimeCNP Processing Time-- mainly essential works with excavation permit (~ 40%)mainly essential works with excavation permit (~ 40%)

Year 2010 Year 2011(up to August 11)

% within 14 days 82 % 79 %

% between 15 and 18 days

14 % 15 %

% > 18 days 4 % 6 %

CNP TargetCNP Target

CNP Target

Performance Pledge 18 days (90 %)

“Good” submission 10 -14 days

Percussive Piling General Works

Hours General Holidays

Weekdays General Holidays

Weekdays

0000-0700 X X CNP CNP

0700-1900 X CNP CNP √

1900-2400 X X CNP CNP

The CNP SystemThe CNP System

Construction Noise Control PhilosophyConstruction Noise Control Philosophy

• Day time (weekdays) - no CNP control on GW

• Night time - people have theright of peace for rest

• No CNP granted unlessreally necessary

CNP ApplicationsCNP Applications

• Fully utilize the less noisesensitive hours

• Apply only if really necessary

• Self-assess before applying

• Apply well in advance

• Provide all relevant information and supportingdocument – e.g. essential works

CNP AssessmentCNP AssessmentTechnical memoranda for assessment

Meeting noise requirements

No prohibited activities

Special Case - unavoidable constraints on workinghours e.g. roadworks with excavation permit atbusy street• Justification required

• Quietest means + Practical noise mitigationmeasures

Checklist for a Good CNP SubmissionChecklist for a Good CNP Submission

1. Joint Venture / Consortium company –provide the names of all the concerned incorporated mother companies

PMM JV (trading as ABC Co. and XYZ Co. Ltd)

Form 1Construction Noise Permit (GW) Application

(Mainly focus on unavoidable constraints on working hours, essential permits)


2. Provide copyof the BRC of theapplicant

Checklist for a Good CNP SubmissionChecklist for a Good CNP Submission3. Show the previous CNP no.

ABC Construction Co. Ltd.

Checklist for a Good CNP SubmissionChecklist for a Good CNP Submission4. Provide copy of the Works Order /

Excavation permit no., if any5. A site plan of appropriate scale (preferably

1:1000)


XXXXXXX

Works Order No. HD003524 from Hyd.

XXXXXXXXXXXXXXXXXXXX

XXXXXX

XXXXXXXXXXXX

Checklist for a Good CNP SubmissionChecklist for a Good CNP SubmissionHyd’s Term Maintenance Contract No. 20/HY/2004

(for blanket permit submission)


6. Actual working days required – fill in Part E.2 e.g. the use of multiple breakers resulting in shortening the actual excavation period

The excavation together with the rectification works will last for one week only, i.e. 2.11.2011 to 8.11.2011.

XXXXX


7. Provide clear 3R size color photograph

Clear color photo

Unclear photo

√


8. Provide NEL / QPME copy, if any

NEL (breaker) QPME label


9. Fixed location PME - e.g. fixed generator, tower crane and material hoist

provide relative distances of such equipment to the site boundary on the submitted plan to facilitate EPD’s assessment

10. Identify practicable working hours that cause the least noise nuisance

• Refer to “Checklist to explore the feasibility of daytime roadwork”


http://www.epd.gov.hk/epd/english/application_for_licences/guidance/files/roadwork_checklist.pdf

Checklist to explore the feasibility of Checklist to explore the feasibility of daytime roadworksdaytime roadworks

1. Non-restricted hours (day hours of normalweekdays)

2. Day hours on general holidays (preferablyafter 9 or 10 a.m.)

3. Evening hours outside general holidays

4. Overnight

Feasibility of daytime roadworks ?Feasibility of daytime roadworks ?

Feasibility of daytime roadworks ?Feasibility of daytime roadworks ?

11.11. Essential work Essential work - unavoidable constraints onworking hours

• No acceptance of CNP application in generalwithout supporting document

• Provide supporting documents

TD/Police’s comment

TMLG meeting notes

Results of trial lane closure


XXXXXXXXXXXX

XxxxxxxxxxxxXXXX

XXXX

12.12. Essential work Essential work - unavoidable constraints on working hours

• Require the use of quietest practicable construction

method

• Use of Quiet Construction Equipment for Road Opening Works during non-Sociable Hours

http://www.epd.gov.hk/epd/english/resources_pub/publications/files/pn96_1.pdf


ProPECCPN1/96

• Hydraulic crusher for demolition 20 dB(A) lower than excavator mounted breaker

• others, e.g. QPME

Modern wire saw for concrete cutting 16 dB(A) lower than excavator mounted breaker

√

√

Quiet Construction Equipment

Enclosure / Barriers

Acoustic enclosure for breaker reduce 3-5 dB(A)

6m barrier for pre-bored machines reduce 3 dB(A)

√

√

•• Emergency Emergency ≠≠ ““planned planned ““ urgent worksurgent works

• Emergency work shall satisfy requirements Emergency work shall satisfy requirements of defence provisions under S. 33 of NCOof defence provisions under S. 33 of NCO

• ““PlannedPlanned”” urgent works require a CNP urgent works require a CNP (CNP could be issued in a shorter time if all info. is available(CNP could be issued in a shorter time if all info. is available))

• Fallacy of Fallacy of ““blackspotsblackspots”” where CNP will where CNP will never be grantednever be granted

ReminderReminder

• “How to complete and submit CNP application forms”

http://www.epd.gov.hk/epd/english/application_for_licences/guidance/cnp.html

• “Checklist to explore the feasibility of daytime roadwork”

http://www.epd.gov.hk/epd/english/application_for_licences/guidance/files/roadwork_checklist.pdf

• “Use of Quiet Construction Equipment for Road Opening Works during non-Sociable Hours”

http://www.epd.gov.hk/epd/english/resources_pub/publications/files/pn96_1.pdf

• “Guidelines for preparation of noise measurement report for PME”

http://www.epd.gov.hk/epd/english/application_for_licences/guidance/files/guidelines_nm_pme.pdf

Useful EPD’s Website :

Thank YouThank You！！

A Guide to Good CNP Submission (original) - epd.gov.hk · Construction Noise Permit (GW)...

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