DESIGN PRACTICES AND STANDARDS
o DIM o GS
SUMMARY DATA SHEET
1.0 NEW/UPDATED STANDARD
TITLE: GS 2-1-1 Noise
REVISION DATE & NO.: July 2004 Rev. 2
2.0 SPEC(S) USED PRIOR TO NEW/UPDATED STANDARD
TITLE: GS 2-1-1 Noise
REVISION DATE & NO.: February 1999 Rev. 1
3.0 PRIMARY AUTHOR(S):
(Name / Dept) Ahmad Zidni Mat / PPD
4.0 REVIEWERS:
(Name / Dept) Ungku Hishamuddin Tahir / Surface Technical Dept.
Larry W Dubose / Surface Technical Dept.
Colin Sanderson / Machinery
Ayob Yahaya / POD
Ho Wing Kwong / PPD
5.0 SUMMARY OF CHANGES
CHANGE IMPACT
Blank = None, P=Positive,
D=Detrimental
INTERNATIONAL STANDARDS EXCEPTION
NATIONAL STANDARDS EXCEPTION
CONSINDER FOR RETROACTIVE
APPLICATION (YES/NO)
COST IMPACT (USD K)
ENVIRONMENTAL
EMEP EXCEPTION
SAFETY/HEALTH
OPERABILITY
CORROSION
SCHEDULE
CHANGE DESCRIPTION REASON FOR CHANGE
RISK
(Indicate Para # from new/updated DIM/GS)
NO NO 3.0: Corrected "Lp" to "Lp" , Added to correct
"Lp = 20 log10 (P1/P0) dB" to mathematical expressions.
"Lp = 20 log 10 (P1/P0) dB ", and "2 x 10-5 Pa" to
"2 x 10-5 Pa" Clarification only.
NO NO 3.0: Corrected "Lw" to "Lw" , Added to correct
"Lw = 20 log10 (W1/W0) dB" to mathematical expressions.
"Lw = 20 log 10 (W 1/W 0) dB ", and "10-12 W" to
"10-12 W" Clarification only.
update data sheet GS 2-1-1 1
DESIGN PRACTICES AND STANDARDS
o DIM o GS
SUMMARY DATA SHEET
NO NO 3.0: Added " It can be written mathematically as: Added to improve the
contents and consistency.
1 n L ( i) / 10
LeqT = 10 log 10 [( ∑10 )]
T i =1
Clarification only.
where summation is taken over n events of
exposure time t(i) hours, and personnel are
exposed to known sound pressure levels L(i) over
an average working day of T hours (an average
working day consisting of n events lasting t(i)
hours).
NO NO 4.2: Added " .........except the engines of Firewater Industry is not ready to
Pumps and emergency generator for which the limit provide emergency
shall be 105dBA." measure below 105dBA.
Clarification only.
6.0 LIST OF UPDATED INTERNATIONAL & NATIONAL STANDARDS AND PRACTICES REFERENCED IN THE
DIM/GS.
NIL
7.0 CHECKLIST FOR NEW/UPDATED STANDARDS
Item No. Yes/No/NA Notes*
1. Does this DIM/GS require approval from Steering
Committee or Deputy Production Manager ? No
4. Conform to applicable National standards Yes
5. Conform to EMEP NA Applicable only after rollout is
completed
6. Meet or exceed applicable regulatory requirements or Yes
PETRONAS guidelines
7. Embody responsible requirements where regulations NA
do not exist
8. Reflect latest developments and lessons learned Yes
9. Consider facilities abandonment requirements (Refer to NA
PETRONAS Guidelines for Platform Decommissioning)
10. Consider Human Factor requirements (Refer to MOH No
Industrial Hygiene Checklist)
11. Consider effects of new/updated industry standards Yes
12. Consider applicable Project Change Notice (PCN) Yes
forms
13. Incorporate approved DIM/GS Permanent Change NA No PCR raised during this period.
Recommendation Forms
14. Consider relevant DIM/GS Bulletins Yes
update data sheet GS 2-1-1 2
DESIGN PRACTICES AND STANDARDS
o DIM o GS
SUMMARY DATA SHEET
Notes* - Include PCN No., Safety Bulletin Ref. No., Lesson Learned Ref. No. and GS/DIM Bulletin Ref. No.
8.0 APPROVAL TO ISSUE THE NEW/UPDATED STANDARD
(Refer to Section 4.3 in DIM 0-1 / GS 0-0-1 for approval level required)
Approved by: _____________________________ Date:
Param Kandiah
EMM Manager
update data sheet GS 2-1-1 3
DESIGN PRACTICES AND STANDARDS
o DIM o GS
SUMMARY DATA SHEET
COST-ADD IMPACT OF DIM/GS CHANGE
EVALUATION FORM
DIM/GS No & TITLE: GS 2-1-1 Noise - June 2004 - Rev 2.0
DESCRIPTION OF CHANGE IN DIM/GS REQUIREMENT:
Requirements before change:
Requirements after change: See Section 5, Summary of Changes
EVALUATION OF LIFE CYCLE COST IMPACT:
COST ESTIMATE (US$ 'K)
COST COMPONENTS
Before Changes After Changes Impact
CAPEX
- Design
- Fabrication
- Materials
- Testing / Commissioning
- Others (describe below):
Total CAPEX Impact:
OPEX (Typical Annual Cost)
Operations & Maintenance:
- Painting
- Repair
- Consumables
- Manpower Services
- Others (describe below):
Annual OPEX Impact: NA NA
BASIS FOR COST ESTIMATES:
All CAPEX costs are based on Class V estimates for each item that has changed in the Summary Section. No feedback
from vendors was obtained and the estimates are based on estimates from within the I&E Design Group. All costs are
estimated incremental costs.
PREPARED BY: Ho Wing Kwong / Ahmad Zidni
Mat - July 2004
[name & date]
REVIEWED BY: REVIEWED BY:
EPD Manager Operation Supt
[CAPEX Portion] [OPEX Portion]
APPROVED BY: APPROVED BY:
PPD Manager Operations Manager
[CAPEX > USD250K] [OPEX > USD100K]
update data sheet GS 2-1-1 4
DESIGN PRACTICES AND STANDARDS
o DIM o GS
SUMMARY DATA SHEET
update data sheet GS 2-1-1 5
