NOISE MANAGEMENT PLAN

Transcription

1 Young to Wagga Wagga Pipeline Looping Project Project No.: Q8291 Doc No: 8291-PLN-005 NOISE MANAGEMENT PLAN Details revised as per NSW Dept of Planning G.O Mahony P. Grant G. O Mahony Issued for Use sections 1 to 3 added; Construction and Blasting Limits section revised, general revisions (all unmarked). D. Bridge P. Grant G. O Mahony A Issued for Review Aecom G. O Mahony G. O Mahony REV DATE DESCRIPTION PREPARED CHECKED APPROVED 8291-PLN-005_1_NoiseMP.docx Page 1 of 18

2 Contents 1 Purpose Definitions References Noise Management Noise Management Levels Construction Noise Impacts Noise Barriers Key Construction Noise Mitigation Measures Construction and Blasting Blast Procedure Trial Blast Blasting Criteria Blasting Locations Blast Monitoring Complaints Management Notification and Recording Use of Noise Monitoring / Complaints Contingency Documentation Appendix 1 Construction Noise Contours PLN-005_1_NoiseMP.docx Page 2 of 18

3 List of Tables Table 1: Noise Level Thresholds... 6 Table 2: Noise Receptors Management Levels... 6 Table 3: Airblast Overpressure Criteria... 9 Table 4: Peak Particle Velocity Criteria... 9 Table 5: Complaints Management Contacts List of Figures Construction Noise Contours & Receptor Locations Figure 1 of Construction Noise Contours & Receptor Locations Figure 2 of Construction Noise Contours & Receptor Locations Figure 3 of Construction Noise Contours & Receptor Locations Figure 4 of Construction Noise Contours & Receptor Locations Figure 5 of o000o PLN-005_1_NoiseMP.docx Page 3 of 18

4 1 Purpose To describe the controls used on this project to manage noise levels from general construction activities vibration and airblast levels from blasting operations. 2 Definitions Airblast overpressure The pressure in excess of ambient atmospheric pressure which occurs when an air blast wave passes a given position. The maximum excess pressure is known as the peak overpressure and it is when this is excessive (>180dB) that structural damage may occur. Airborne noise management levels Background noise level To be measured and assessed at the residential property boundary that is most exposed to construction noise, and at a height of 1.5 m above ground level. If the residential property boundary is more than 30 m from the residence, the location for measuring or predicting noise levels is at the most affected point within 30 m of the residence. [Interim Construction Noise Guideline DECCW, July 2009] The underlying level of noise present in the ambient noise when extraneous noise is removed and excluding noise from the construction project under consideration. This is described using the L A90 descriptor. db(a) A measure of A-weighted sound levels. [Interim Construction Noise Guideline DECCW, July 2009] DECCW Department of Environment, Climate Change and Water (NSW). L A90(15 min) The A-weighted sound pressure level that is exceeded for 90% of the 15-minute measurement period, when measured in the absence of the construction works under consideration and excluding extraneous noise. This is considered to represent the background noise. [Interim Construction Noise Guideline DECCW, July 2009] L Aeq(15 min) The A-weighted equivalent continuous (energy average) A-weighted sound pressure level of the construction works under consideration over a 15-minute period and excludes other noise sources such as from industry, road, rail and the community. Other descriptors may be used providing they can be justified as representing the characteristics of the construction noise. [Interim Construction Noise Guideline DECCW, July 2009] Noise Noise includes vibration of any frequency, whether emitted through air or another medium PLN-005_1_NoiseMP.docx Page 4 of 18

5 Peak Particle Velocity The rate at which a particle of ground is moving, i.e. a measure of ground vibration, in millimetres per second. RBL Rating Background Level the overall single-figure background noise level for each assessment period. Determination of the rating background level is by the method described in the NSW Industrial Noise Policy (EPA 2000). This approach aims to result in the noise management level being met for at least 90% of the time periods (15 minutes each) over which reactions of annoyance can occur. [Interim Construction Noise Guideline DECCW, July 2009] 3 References The following documents were used as reference material for this noise management plan PLN-003 Environmental Management Plan. Project Approval, dated 25th May 2010 from the Department of Planning (NSW) Blasting Management Plan and Work Method Statement, prepared and authorised by Melanie Hodgson, Technical Service Engineer, Orica Quarry & Construction Services NSW dated Technical Basis for Guidelines to Minimise Annoyance Due to Blasting Overpressure and Ground Vibration, published by the Australian and New Zealand Environment Council, September Applicable legislation is: Protection of the Environment Operations Act 1997 (NSW) Protection of the Environment Operations (Noise Control) Regulation 2008 (NSW) Interim Construction Noise Guideline (NSW) 8291-PLN-005_1_NoiseMP.docx Page 5 of 18

6 4 Noise Management 4.1 Noise Management Levels Table 1 outlines the noise management levels as specified within the DECCW publication Interim Construction Noise Guideline. Table 1: Noise Level Thresholds Receptor Residence / Standard hours Classrooms at schools & other educational institutions Hospital wards and theatres Places of worship Active recreation areas Management Level [L Aeq(15 min)] Noise affected / RBL + 10 db(a) Internal noise level 45 db(a) Internal noise level 45 db(a) 45 db(a) 65 db(a) As the area is predominantly rural with very few permanent noise sources, the RBL has been conservatively assumed as 30dB(A). As such, a noise management level for the potentially affected residence as shown in Appendix 1 Construction Noise Contours would be 40dB(A) (this is also consistent with other sensitive land uses). Table 2: Noise Receptors Management Levels Receptor Offset Criteria Details Residences Noise Affected 40 db(a) 54 Highly Noise Affected 75 db(a) None Sensitive Receptors 45 db(a) / 65 db(a) None 4.2 Construction Noise Impacts While there are a significant number of receptors within distance of perception ( noise affected ), there are no receptors located within the highly noise affected (>75dB(A)) offset distance (refer Appendix 1 Construction Noise Contours). Furthermore, none of the specific receptors (e.g. classroom and places of worship) will experience the management levels outlined in the Interim Construction Noise Guideline. Noise impacts will be limited by the fact the construction site will progress along the route quite rapidly (approximately 2km per day weather and ground conditions permitting). This rate of progress would limit the exposure of noise levels from db(a) to approximately 1 day. If the need for rock hammering arises, it will be conducted intermittently and respite periods will be provided if required in close proximity to residences. Consultation with potentially affected land holders will be conducted, however this may be at short notice given the areas requiring rock hammering cannot be confirmed until excavation commences. No receptors are predicted to reach the barely noticeable degree of perception for vibration for rock hammering, and the offset distance will be greater than 20m for all residences PLN-005_1_NoiseMP.docx Page 6 of 18

7 4.3 Noise Barriers The use of noise barriers to reduce construction noise was assessed and rejected. For noise barriers to be effective in controlling noise from heavy plant and equipment they will need to be higher than the exhaust point, which is often located >3m from the ground. An effective barrier for such a source is required to be approximately 3-5m high and would need to be moveable making it very unwieldy and difficult to manage safely. Such a barrier would require substantial structural support and installation times would extend the period of exposure significantly and result in a greater potential impact. As such, barriers were not considered appropriate. The primary mitigation strategies for control of this short-term (approximately 2 day exposure) is considered to be best achieved through source controls (quiet equipment selection and maintenance), resident notification/consultation, and limiting of the exposure time by progressing works as efficiently as practicable. 4.4 Key Construction Noise Mitigation Measures Mitigation measures include the following: Construction, including rock hammering (but excluding blasting) that would generate audible noise at any residential premises will only occur during the following hours: 7am-6pm Monday to Friday inclusive 8am-1pm on Saturdays At no time on Sundays or public holidays. Where agreement is reached with sensitive receivers and no residential premises are affected, construction activities may be permitted outside of these hours. These hours do not apply where directed otherwise by police or other relevant authority for safety reasons. Construction work outside of these hours can only be conducted with prior written approval of the Director-General. A complaints response fact sheet will be prepared and potential receivers will be provided with points of contact accessible during working hours. Refer section 6 Complaints Management. Complaints relating to noise and vibration from construction activities raised will be urgently investigated and where required, additional controls implemented. Site induction will include measures to raise awareness on noise and vibration impacts. Machinery will be regularly serviced and maintained to optimum working conditions to minimise potential noise and vibration impacts. Reversing alarms may be temporarily disabled and replaced by spotters, if necessary, in urban environments. Loudest operations will be programmed for the time of day likely to cause least impact wherever practicable. Vehicle operation and deliveries will be restricted to working hours (where appropriate) PLN-005_1_NoiseMP.docx Page 7 of 18

8 Consultation has been ongoing throughout the duration of project development and included advisement of the anticipated construction timeframes. Further notifications will be provided prior to any site access and will include. the length of time and the hours during which impacts may be experienced, the nature of activities and potential impacts a contact number for complaints to be recorded and responded to 5 Construction and Blasting Refer: Blasting Management Plan and Work Method Statement, provided by Orica Quarry & Construction Services. Blasting is required on the project, and will be subject to a specific blasting plan and submitted for approval by the Department of Planning prior to commencement. 5.1 Blast Procedure Blasting operations will be conducted by licensed competent personnel in accordance with relevant legislation, the Explosives Act 2003 (NSW), and AS 2187 Explosives Storage, transport and use. The blasting subcontractor will conduct an on-site risk assessment in conjunction with WDS prior to the trial blast to determine risks, suitable management procedures, lines of communication and interaction with other pipeline activities, personnel and landowners. All site personnel will be advised of blasting operations and their responsibilities in the process, including blast vehicle routes and right of way, exclusion zones, blast times, blast warnings, the all clear, misfire warnings and emergency response procedures. Landowners potentially affected by blasting will be given one week notification in order to move or protect any infrastructure or livestock that may be affected by the blast. They will be notified again 48hrs prior to blasting and again on the day of the blast. Workcover, the Local Council and the local police will also be informed of blast times. It is planned that each main blast will be completed from set up to all clear in one day and the blasting program should last no more than one week at the specified blasting location. 5.2 Trial Blast The main sensitive receptor on the project is the existing pipeline. The Blast Design Engineer will use a formula (as per the Blasting Management Plan and Work Method Statement) to comply with the allowable peak particle velocity of 50mm/s limit. A trial blast will be conducted before main blasting commences in order to determine: The maximum charge that can be used in blasting to achieve the best possible results The most effective drill pattern 8291-PLN-005_1_NoiseMP.docx Page 8 of 18

9 5.3 Blasting Criteria Blasting criteria will be assessed in accordance with the Technical Basis for Guidelines to Minimise Noise Annoyance Due to Blasting Overpressure and Ground Vibration (ANZEC 1990) and the conditions contained in the Project Approval. Blasting will only be performed during the following hours: 9am-5pm Monday to Friday inclusive 9am-1pm on Saturdays At no time on Sundays or public holidays. Airblast overpressure generated by blasting associated with the project will not exceed the criteria specified in Table 3, when measured at the most affected residence or other sensitive receiver. Airblast Overpressure (db(linpeak) Table 3: Airblast Overpressure Criteria Allowable Exceedance 115 5% of the total number of blasts over a 12 month period 120 Never [Source: Project Approval dated 25 th May 2010, Table 1] Ground vibration generated by blasting associated with the project will not exceed the criteria specified in Table 4 when measured at the affected residence or other sensitive receiver. Table 4: Peak Particle Velocity Criteria Peak Particle Velocity (mm/s) Allowable Exceedance 5 5% of the total number of blasts over a 12 month period 10 Never [Source: Project Approval dated 25 th May 2010, Table 2] 5.4 Blasting Locations The current location of rock is marked on the drawings in Appendix 1 Construction Noise Contours.This is the only location along the pipeline route identified as requiring blasting. 5.5 Blast Monitoring With the exception of the existing pipeline, a dilapidation survey will be conducted of sensitive receptors within the 500m of the blast zone prior to, and after, a main blast. There are no sensitive receptors within this 500m zone at the current blast location. The closest residence is 1km away from this point. Monitoring of each main blast for airblast overpressure and peak particle velocity at the existing pipeline will be conducted by the blasting subcontractor and the results recorded. Misfires will be handled in accordance with the blasting subcontractor s procedures PLN-005_1_NoiseMP.docx Page 9 of 18

10 6 Complaints Management 6.1 Notification and Recording A Complaints Register will be held at the APA Offices in Young. Receivers that raise concerns with field staff will be provided with the details of the Site Contact telephone numbers in excess of those publically advised: For WDS records, the quality form QUA002 Action Request shall be used to log any complaints. Action Requests will then be logged for close-out using form QUA008 Action Request Register in accordance with section 2.12 Community Liaison & Notifications of 8291-PLN-003 Environmental Management Plan. Table 5: Complaints Management Contacts Who Position Phone Number Peter Huxley/ Phil Thurnam APA Supervisor Vladeo Maric Lands Manager Mukesh Bhatia/ Rehan Bukhari APA Project Staff Young (after hours) APA Controller All complaints will be recorded including the following information obtained and be relayed to the Lands Manager during business hours: a) the date and time, where relevant, of the complaint b) the means by which the complaint was made (telephone, mail or ) c) any personal details of the complainant that were provided, or if no details were provided, a note to that effect d) the nature of the complaint. The Young Complaints Register will also record a) any action(s) taken in relation to the complaint, including timeframes for implementing the action b) if no action was taken in relation to the complaint, the reason(s) why no action was taken. 6.2 Use of Noise Monitoring / Complaints Contingency Given the anticipated noise levels will be short term in any one area, regular monitoring is not considered to be warranted. However, where complaints arise, each resident will be initially responded to within 24 hours (immediately if possible) and where appropriate monitoring will be implemented. During construction, plant noise levels will be verified at approximately monthly intervals. To avoid unnecessary concerns with receptors, verifications will not involve testing at residential premises, unless specific concerns or complaints are received. Where monitoring forms part of the resident complaint resolution agreement, it is expected to comprise a combination of the following, but will be determined on a case by case basis: 8291-PLN-005_1_NoiseMP.docx Page 10 of 18

11 Monitoring at nearby residences Monitoring of plant and equipment 8291-PLN-005_1_NoiseMP.docx Page 11 of 18

12 7 Documentation The following WDS documents are referenced in this procedure: 8291-PLN-003 Environmental Management Plan... 5, o000o PLN-005_1_NoiseMP.docx Page 12 of 18

13 Appendix 1 Construction Noise Contours Young to Wagga Wagga Looping Pipeline Project Bethungra to Wagga Wagga Section 8291-PLN-005_1_NoiseMP.docx Page 13 of 18

14 Construction Noise Contours & Receptor Locations Figure 1 of PLN-005_1_NoiseMP.docx Page 14 of 18

15 Construction Noise Contours & Receptor Locations Figure 2 of PLN-005_1_NoiseMP.docx Page 15 of 18

16 Approx. Blast Location Ch to Construction Noise Contours & Receptor Locations Figure 3 of PLN-005_1_NoiseMP.docx Page 16 of 18

17 Construction Noise Contours & Receptor Locations Figure 4 of PLN-005_1_NoiseMP.docx Page 17 of 18

18 Construction Noise Contours & Receptor Locations Figure 5 of PLN-005_1_NoiseMP.docx Page 18 of 18