HVO 2009 Annual Environmental Management Report - Final

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Coal & Allied – Hunter Valley Operations Blast exceeded 115 dB on 21 Jan 09 Wind affected result Warkworth Blast exceeded 120 dB on 6 July 09 130 11 120 10 Overpressure (dB) 110 100 90 80 70 60 9 8 7 6 5 4 3 2 Ground Vibration (mm/s) 50 1 40 0 Jan Feb March April May June July Aug Sept Oct Nov Dec Overpressure dB(L) EPA Overpressure Limt for Max 5% of Blasts EPA Ground Vibration Limit EPA Overpressure Limit Ground Vibration (mm/s) EPA Ground Vibration Limit for Max 5% of Blasts Figure 76: Warkworth Blast Monitoring Results 2009 AEMR 2009 129
Coal & Allied – Hunter Valley Operations 3.10 OPERATIONAL NOISE 3.10.1 Environmental Management The objectives of acoustic management on site are to install, operate and efficiently maintain equipment in such a way that: Emitted noise levels within the workplace do not exceed defined health criteria; and Emitted noise levels do not unduly affect the amenity at the nearest privately owned residences. The DoP has responsibility for the approval of noise emissions from industrial and mining sites. Consent limits are determined in conjunction with the DECCW. The current consent limits are based on guidelines in the DECCW Industrial Noise Policy. Noise impacts must be assessed separately against each of the relevant development consents. Refer to Appendix 12 for attended noise monitoring and Appendix 13 for real time noise monitoring results. Since 2006, all private agreements between HVO and neighbouring property owners have ceased. One agreement ceased due to the purchase of the property by Coal & Allied. Another agreement concluded due to the purchase of the property by a neighbouring mining company and another ceased due to the property owner withdrawing from the agreement. Operational Noise Controls HVO manages and controls noise in accordance with HVO noise management plan and Coal & Allied’s EMS Environmental Procedure 9.1 Noise. Control procedures used as part of the HVO include: At the project approval stage, noise modelling is used to predict the areas potentially affected by noise impacts; Development consent conditions are established to allow the purchase of those properties adversely affected; Mining equipment is maintained to ensure high availability and to meet relevant noise emission criteria; Monitoring of mobile plant and ancillary plant sound power levels is undertaken on an ongoing basis; Preferential use of quieter equipment in noise sensitive areas; The CHPP is enclosed in buildings and protective structures that effectively contain noise generated in these processes to the close proximity of the plant; Designation of dumps for night time and day time use are incorporation into the mine planning process; and Ongoing operator education is carried out to improve awareness of noise issues. The mobile equipment noise measurement specification, developed by Coal & Allied in 1999, continued to be applied during 2009. Figure 77 details the HVO Equipment Noise Reduction Plan for 2009. HVO have established an equipment noise-monitoring programme to comply with consent conditions relating to the investigation of ways to minimise operational noise. Sound power testing is undertaken on an ongoing basis in order to identify items of plant which are noisier than average (typical for that type of plant item), and also to see if there is a change in sound power with time. The intention is that those items identified with greater than average sound power or showing a significant increase during subsequent testing may come under additional scrutiny as part of routine maintenance procedures. This type of monitoring and action is a form of noise control. Sound power testing of equipment was undertaken in August 2009. A total of 51 pieces of equipment were tested throughout the reporting period, representing a total of 34 per cent of the total equipment fleet tested. AEMR 2009 130
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HVO 2009 Annual Environmental Management Report - Final

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