Orica Australia Pty Ltd Ammonium Nitrate Facility Upgrade

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Penelope Foster
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1 Orica Australia Pty Ltd Ammonium Nitrate Facility Upgrade January 2010 Revision 0

2 Contents 1. Introduction Purpose Objectives Relevant Environmental Legislation, Guidelines and Policies Minister for Planning s Conditions of Approval (MCoA) 1 2. Potential Erosion and Sedimentation Impacts 2 3. Roles and Responsibilities 3 4. Erosion and Sediment Control Plan 4 5. Monitoring and Reporting 7 6. Review 9 Table Index Table 3-1 Responsibilities of Parties 3 Table 4-1 Erosion and Sediment Control Plan 4 Table 5-1 Monitoring and Reporting Commitments 7 Appendices A Erosion and Sediment Control Plan Example 22/14845/89141 R0 Ammonium Nitrate Facility Upgrade

3 1. Introduction 1.1 Purpose GHD has prepared an Erosion and Sediment Control Plan in accordance with Landcom s 2004 Managing Urban Stormwater: Soils and guidelines for the management of civil and other works associated with the expansion of Orica s Kooragang Island Ammonium Nitrate facility. 1.2 Objectives The objectives of the Erosion and Sediment Control Plan are to: Outline measures to manage civil and other works that could result in erosion of land and the generation of sediment discharge from the site. Detail the measures to be implemented to ensure that the appropriate controls are utilised during the course of the Project. 1.3 Relevant Environmental Legislation, Guidelines and Policies works on the site are required to be undertaken in accordance with various environmental legislation and government guideline documents. Key requirements include: NSW Protection of the Environment Operations Act 1997 (POEO). Landcom s Managing Urban Stormwater: Soils and (2004) Environment Protection Licence No. 828, including condition L1 which requires the licensee to comply with s120 of POEO unless provided for by a condition in the licence and condition M2 which requires monitoring of stormwater discharge from the site. 1.4 Minister for Planning s Conditions of Approval (MCoA) The Minister for Planning s Conditions of Approval (MCoA) No requires that the project meet the following requirements in relation to erosion and sediment control: Stormwater Management Plan 44 Prior to construction of the Project, the Proponent shall prepare an Erosion and Sediment Control Plan in accordance with Landcom s 2004 Managing Urban Stormwater: Soils and. 22/14845/89141 R0 Ammonium Nitrate Facility Upgrade 1

4 2. Potential Erosion and Sedimentation Impacts Erosion and sedimentation impacts which may result from the construction activities associated with the expansion project include: Increased potential for sedimentation of runoff due to erosion of areas disturbed by construction activities and the stockpiling of soils, resulting in a decline in the quality of stormwater discharge from the site. Potential for transport of sediment onto traffic areas, with subsequent air quality issues. Potential for obstruction of the stormwater network as a result of the settling of sediment into pipes and associated collection pits. 2 Ammonium Nitrate Facility Upgrade 22/14845/89141 R0

5 3. Roles and Responsibilities The personnel responsible for the implementation of this plan are specified in Table 3-1. Table 3-1 Responsibilities of Parties Title Project Manager Site Project Manager Project Environment Representative All personnel Responsibility The Project Manager is responsible for: Reviewing and authorising this plan. Monitoring the effectiveness of the measures detailed in this plan. The Site Project Manager is responsible for: Implementing this plan. The Project Environmental Representative is responsible for: Maintaining and updating this plan. Educating relevant staff and contractors to ensure all are aware of their obligations under this plan. Coordinating all activities and investigations required under this plan. Providing specialist advice on erosion and sediment control issues. Undertaking periodic reviews of compliance with this plan. The is responsible for: Implementing this plan. Coordinating any activities and investigations required under this plan. Undertaking periodic reviews to ensure implementation of this plan by the. The is responsible for: Implementing this plan. Coordinating any activities and investigations required under this plan. Ensuring all personnel are aware their obligations in relation to this plan. Other staff and contractors of the proponent are responsible for: Being aware of their obligations under this plan. Immediately informing their supervisor of any issues with erosion and sediment control measures. 22/14845/89141 R0 Ammonium Nitrate Facility Upgrade 3

6 4. Erosion and Sediment Control Plan This plan details the controls that shall be implemented to ensure that the project objectives are met as outlined in Table 4-1. Table 4-1 Erosion and Sediment Control Plan Issue Control Responsibility Timing Land Disturbance The soil erosion and sedimentation hazard on the site shall be kept as low as possible and practical. To this end, works shall be undertaken in the following general sequence: a) of sediment and erosion controls. b) Phase construction works so that land disturbance is confined to areas of workable size. c) Rehabilitation of any disturbed lands within 20 working days from completion of construction activities. Disturbed Land Sediment Control Clean water flow shall be diverted around land disturbance works using sandbags, earth bunds or other methods, to prevent contamination by sediments. Where required, sediment loss from disturbed land shall be minimised by installing sediment fences, sediment basins or other control measures, on their downstream side. Where required, measures shall be installed around kerb inlet pits to minimise the potential for discharge of sediment into the drainage system. Measures to be implemented could include the use of sandbags or netting/gravel sausages. Where spoil is placed in the vicinity of excavations or trenches it shall be located, where possible, upgradient of the opening to ensure any sediment is directed into the excavation. Temporary bunding shall be used to control flow if the material is placed downgradient of the excavation. 4 Ammonium Nitrate Facility Upgrade 22/14845/89141 R0

7 Issue Control Responsibility Timing Temporary sediment and erosion control structures shall be removed only after the disturbed lands they are protecting are rehabilitated and stable against erosion. Where required, road sweeping shall be undertaken to minimise the potential for sediment. Erosion Control Temporary protection from wind and water erosion shall be undertaken, if required, on stockpiles and disturbed land where work is unlikely to proceed for periods of at least two months and final shaping has not been completed. Options for management of this issue include: a) temporary vegetative cover. b) physical covering such as hessian and tarpaulin. Foot and vehicular traffic shall be kept away from any rehabilitated areas to aid their stabilisation. Final landscaping shall be undertaken on each area as soon as possible following completion of the construction works. Stockpile Management All stockpiles of soil or other materials shall be placed away from drainage lines, gutters or stormwater pits or inlets. Where required, controls shall be implemented to minimise the potential for erosion or sedimentation of the stockpiles. A sediment and erosion control plan shall be prepared for each stage of the Project where stockpiling of soil is undertaken detailing the sediment and erosion control measures. The requirements shall be documented in an Erosion and Sediment Control Plan, with an example (Drawing No SK002) shown in Appendix A. Site Project Manager Pre- 22/14845/89141 R0 Ammonium Nitrate Facility Upgrade 5

8 Issue Control Responsibility Timing Stockpiles of any contaminated soils shall be placed on concrete or plastic, or (where the potential for impact from leaching is low) on fill material destined for disposal. Controls shall be implemented to minimise the potential for erosion or sedimentation, including covering of stockpiles or use of sediment fences. Additional Matters Any existing trees which are to remain in the construction areas shall be protected by ensuring that no stockpiling of material occurs in their immediate vicinity. Fencing shall be installed to define No go areas under the canopy of the trees. Awareness and Training The relevant procedures and safeguards for the minimisation of erosion and sediment control shall be included in a site construction induction or similar with contractors to ensure they are aware of their responsibilities. Project Environment Representative Pre- Job Safety and Environmental Risk Assessments (JSERA s) shall incorporate relevant erosion and sediment control measures. / Project Environment Representative 6 Ammonium Nitrate Facility Upgrade 22/14845/89141 R0

9 5. Monitoring and Reporting Monitoring and reporting tasks and responsibilities for the duration of the upgrade are outlined in Table 5-1. Table 5-1 Monitoring and Reporting Commitments Monitoring and Reporting Commitments Responsibility Timing Inspections shall be undertaken on a daily basis during periods when there are earth works, large areas of disturbed land and stockpiles, to ensure that: Erosion and sediment control measures, such as sediment fencing and stockpile covering, are in place and are working effectively. Drains in and adjacent to the Project area are operating effectively. Repairs or maintenance shall be initiated as required. Spilled soil or other materials have been removed from areas where they could potentially be mobilised during a rainfall event. Sediment has been removed from basins and/or traps where it could impact on the performance of the installation. Rehabilitated lands have effectively reduced the erosion hazard. Upgrading or repairs shall be initiated as required. A record of these inspections shall be maintained. Periodic reviews shall be undertaken of the effectiveness of the erosion and sediment controls and remedial actions initiated as required. / Project Environment Representative 22/14845/89141 R0 Ammonium Nitrate Facility Upgrade 7

10 Monitoring and Reporting Commitments Responsibility Timing Failures in the erosion and sedimentation control works shall be reported in the Safety, Health and Environment Management and Reporting System (SHERMIS) and investigated in accordance with Orica and procedures. All personnel 8 Ammonium Nitrate Facility Upgrade 22/14845/89141 R0

11 6. Review The Erosion and Sediment Control Plan shall be reviewed on an annual basis, or as required, to ensure that appropriate requirements for the management of this issue are in place. The Project Environment Representative shall co-ordinate the review of the plan. 22/14845/89141 R0 Ammonium Nitrate Facility Upgrade 9

12 Appendix A Erosion and Sediment Control Plan Example 22/14845/89141 R0 Ammonium Nitrate Facility Upgrade

13 SANDBAGS PLACED SECURELY AROUND SILL OF DROP INLET GROUND LEVEL AT END OF SANDBAG BARRIER MUST BE HIGHER THAN DROP INLET SANDING LAYER. FLOW LEGEND SW STORMWATER DRAIN MAX. 0.25m S SEWAGE LINES EXCAVATION AREA THIS SANDBAG LAYER MUST BE HIGHER THAN THE DROP INLET SANDBAG LAYER SEDIMENT BARRIER DETAIL SANDBAGS PLACED AND COMPACTED TO PREVENT FLOWS PASSING THROUGH THE BARRIER. SEDIMENT CONTROL FENCE PIT INLET PROTECTION KERB INLET SPACER BLOCKS ROLL OF NETTING FILLED WITH 50mm TO 75mm OF GRAVEL SEDIMENT BARRIER FOR KERB INLET PITS 20m MAX. 1.0m GEOFABRIC FLOW STAR PICKETS SILT FENCE ON OR NEAR CONTOUR GEOFABRIC SILT FENCE - PLAN STAR PICKET FITTED WITH SAFETY CAP WOVEN GEOTEXTILE EMBEDDED 150mm INTO GROUND RUNOFF WATER WITH SEDIMENT 150mm GEOTEXTILE INLET FILTER - SECTION FILTERED WATER B FINAL DRAFT ED* C FINAL ISSUE rev description app'd date DISTURBED AREA 2.0m MAX. ORICA FLOW PLAN 0.5m MIN. 0.2m MIN. OVERLAP DETAIL GRASSED BUFFER ZONE GEOTEXTILE EMBEDDED 0.2m INTO GROUND ON UPSLOPE SIDE OF FENCE CAPPED STAR PICKET POSTS (OR EQUIVALENT) DRIVEN 0.5m - 0.7m INTO GROUND CLIENTS PEOPLE PERFORMANCE GEOFABRIC SILT FENCE - PERSPECTIVE Conditions of Use: This document may only be used by GHD's client (and any other person who GHD has agreed can use this document) for the purpose for which it was prepared and must not be used by any other person or for any other purpose. SEDIMENT AND EROSION CONTROL PLAN scale N.T.S for A1 job no SCALE N.T.S date JAN 2010 rev no. C approved E. DONATI* SK002 Plot Date: 14 January :46 AM Plotted by: Rebecca J. Cocks Cad File No: G:\22\14845\CADD\Drawings\ SK002.dwg

Rock & Aggregate Drop Inlet Protection

Rock & Aggregate Drop Inlet Protection SEDIMENT CONTROL TECHNIQUE Type 1 System Sheet Flow Sandy Soils Type 2 System [1] Concentrated Flow Clayey Soils Type 3 System Supplementary Trap Dispersive Soils