Kendall Bay Sediment Remediation Project Community Information and Feedback Session 29 July 2014
Presentation overview • Project update • Technical assessments for the Environmental Impact Statement – preliminary findings • Q and A 2
Project update • Jemena Limited (Jemena) intends to secure development consent to remediate two defined areas within Kendall Bay bordering the former Mortlake Gasworks site • The key objectives of the Project are as follows: – Jemena to fulfil their obligations under their VRA with the EPA – to alleviate the current risk to human health associated with the contaminated sediments within the remediation areas – to alleviate adverse ecological impacts caused from the contaminated sediments 3
Project update and timelines • Currently awaiting outcome of Jemena’s State Significant Development application as well as updated Environmental Assessment Requirements (EARs) • Subject to the above, it is planned to lodge the EIS during Sept 2014, to the Department of Planning & Environment (DP&E), for the test of adequacy • The EIS will subsequently be placed on public exhibition – proposed 4 th Quarter 2014 4
Project area 5
Impact assessment methodology Source: ERM 2012 6
Technical studies for EIS Acoustic impact Hydrology assessment assessment Air quality/odour Landscape & visual impact assessment assessment Ecological impact Social impact assessment assessment Environmental hazard Soil & water assessment assessment Health risk assessment Traffic impact assessment Heritage impact assessment 7
Summary of noise assessment Methodology 1. Baseline studies and data • Baseline noise monitoring (Sept 2012 and Nov/Dec 2013) to establish existing noise conditions at sensitive receptor locations • Noise source data collected for all project plant and equipment – noise modelling to assess impact of remediation works on background (existing) noise levels 2. Impact Assessment • Noise modelling across all project phases (site establishment, remediation and decommissioning) • Predicted noise levels compared against noise assessment criteria at sensitive receptor locations 3. Mitigation Measures • Appropriate mitigation/ management measures devised to manage impacts 8
Summary of noise assessment Impact Mitigation Measures Significance of Impact with Mitigation • Implement best practice noise control The proposed works will result in an increase in noise at measures sensitive receptor locations • Community Consultation adjacent to Kendall Bay (5 – 15 • Noise Management Plan Moderate decibel increase) Noise levels remain under the maximum guidelines allowed for construction (75 decibels) • Community Consultation Traffic noise from heavy vehicle movements will be up to 1 • Noise Management Plan decibel above existing Minor • Limited construction Hours background noise levels 9
Summary of air quality/odour assessment Methodology 1. Baseline studies and data • Baseline odour monitoring (early 2014) at sensitive receptor locations • Baseline sampling from sediments collected from remediation areas • Review of existing meteorological conditions to inform air quality modelling 2. Impact Assessment • Odour and dust dispersion model predicts odour and dust levels at sensitive receptor locations • Odour and dust levels compared against EPA assessment criteria at the sensitive receptor locations 3. Mitigation Measures • Appropriate mitigation/ management measures devised to manage impacts 10
Summary of air quality/odour assessment Impact Mitigation Measures Significance of Impact with Mitigation • Odour control tent and pressurised Odour concentrations below the assessment criteria* industrial building identified at sensitive • Cap excavated area during extraction of receptor locations sediment in the exposed shoreline area Minor No emissions which are • Covered skip bin during marine transport detrimental to human health • Odour suppressant foam will be released during the remediation works • Dust suppressant sprays Dust concentrations below the assessment criteria^ at • Covered skip bin during marine based sensitive receptor locations transport Minor *Assessment criteria for odour is two units below the level set by the NSW EPA ^Assessment criteria for dust is two units below the level set by the NSW EPA 11
Summary of transportation assessment Methodology 1. Baseline studies and data • Traffic counts undertaken over a seven day period at three locations: − Staging site (28 vehicle movements/day) − Tennyson Road (1,257 vehicle movements/day) − Hilly Street (1,183 vehicle movements/day) • Review of all public transport and pedestrian access in the vicinity to the Project 2. Impact Assessment • Assessment of traffic impact on local roads - volumes, safety and efficiency • Assess intersection impacts and level of service post project • Identification of preferred and alternative haulage routes • Assessment of cumulative traffic impacts associated with traffic volumes for future developments in Breakfast Point 3. Mitigation measures • Devise appropriate mitigation/ management measures 12
Summary of transportation assessment Additional traffic from remediation works Stage Duration No. of Heavy Average Additional Vehicle Movements Heavy Vehicle per Day Movements per Day Site establishment ~3 months 11 1 movement per hour Remediation ~6 months 22 2 movements per hour Site De-mobilisation ~3 months 11 1 movement per hour 13
Summary of transportation assessment Cumulative Impacts Location Anticipated Daily Proportion of Traffic Generation Additional Traffic Generation Staging Site Up to 22 heavy vehicle 1% movements per day Staging Site Up to 20 light vehicle 1% movements per day (construction workers) Surrounding Developments 2,014 vehicle movements 98% per day • The assessment of the cumulative volume of traffic generated from both the Project and the new developments in Stage 2 of Breakfast Point indicates the Project will create approximately 2% of the additional traffic on the surrounding road network 14
Summary of transportation assessment Impact Mitigation Measures Significance of Impact with Mitigation • Construction Transportation Increase in heavy vehicle movements causing traffic, operational and/or Management Plan (CTMP) Negligible safety impacts • Traffic Control Plan (TCP) • CTMP 10 car spaces onsite will reduce to 5 - potential overflow in the vicinity of the • TCP Negligible staging site • Provision of additional on- site parking • No management/ mitigation Potential disruptions to local transport options/ routes in the vicinity of the measures identified Negligible staging site and wider Project Area • Notice to Mariners Disruptions to marine recreational use in Kendall Bay Negligible • Vessel speeds 15
Summary of ecological assessment Methodology 1. Baseline studies and data • Review of literature including relevant database searches • Habitat assessment including two field surveys to identify threatened species, communities, benthic organisms, populations and their habitat 2. Impact Assessment • Assessment of Impacts on flora and fauna in accordance with NSW and Federal legislation and NSW Planning Instruments 3. Mitigation Measures • Appropriate mitigation/ management measures devised to manage potential impacts 16
Summary of ecological assessment Options for mangrove stand in Remediation Area A Option 1 Option 2 Option 3 Retain all or part of the Remove the sediment Remove the mangroves mangrove stand while maintaining the and contaminated mangroves in situ sediment from remediation Area A Finding: Remediation cannot occur without removing/ damaging the existing mangrove colony. No practical solution is available to allow retention of mangroves and remediation of sediment on Area A. Option 3 is the only practical approach. Mitigation measures: Develop a mangrove management plan to prepare area for biodiversity re- establishment and management of progress of mangrove re-colonisation Monitor progress to employ adaptive measures if necessary 17
Summary of ecological assessment Impact Mitigation Measures Significance of Impact with Mitigation • Marine habitat monitoring Impacts on threatened or protected fauna species from loss of preferred habitat plan Negligible • Mangrove management plan Physical loss of mangroves habitat Negligible • Re-establishment of mangroves • Water quality management Altered water quality as a result of the re- suspension of sediments during dredging plan Negligible • Use of silt curtains. Water quality impacts from accidental hydrocarbon spills from plant, equipment or Negligible • Visual inspection of pipeline pipeline failure • None identified Impacts to the seabed and marine ecology during removal of contaminated sediments Positive 18
Q and A Session 19
Thank you and close Next Steps • Display and presentation materials from the session will be uploaded to the website for broader interest • Await outcome of Jemena’s State Significant Development application as well as updated Environmental Assessment Requirements (EARs) (expected Q3 2014) • Subject to the above, EIS to be lodged Q3 2014 • Public Exhibition Q4 2014/ Q1 2015 20
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