Soil and Water Management Plan€¦ · Soil and Water Management Plan Page 1 of 26 John Holland ......

Soil and Water Management Plan of 26 John Holland

Rev Date Prepared by Reviewed by Approved Remarks

A 10/07/2014 Krissy Vajda Draft for Principal Review

B 04/08/2014 Krissy Vajda Draft following ER Comments

C 15/08/2014 Krissy Vajda Draft following WP Comments

D 29/08/2014 Peter

Sheehan

Remove Appendix in relation to ERSED Plans and

Peel Ck Crossing now in the CEMP

1 01/09/2014 Peter

Sheehan For Approval

2 24/09/2014 Peter

Sheehan Brandon Perrin

Tony

O’Reilly Response to comments

3 18/11/2014 Peter


Tony

O’Reilly Adjust section 6.7 for static plant

4 23/4/2014 Peter


Tony

O’Reilly Section 6.7 Crane Refuelling MGS

5 03/09/15 Peter


Tony

O’Reilly Revision of Permit to Pump Appendix 3

6 14/01/16 Peter


Tony

O’Reilly Monitoring added to section 7.2

Chaffey Dam Safety Upgrade and Augmentation

Soil and Water Management Plan

Document No. JH/C680/08


Terms and Definitions

Term Definition

AMS Activity Method Statement

AS/NZS Australian Standard/New Zealand Standard

CEMP Construction Environmental Management Plan

CoA Conditions of Approval

DoE Commonwealth Department of the Environment

DPE NSW Department of Planning and Environment

DPI NSW Department of Primary Industries (a division of Trade and Investment)

EIS Environmental Impact Statement

EM Environmental Manager (Project)

EMS Environmental Management System

EPA NSW Environment Protection Authority

EPA Act Environmental Planning and Assessment Act 1979

EPBC Act Environment Protection and Biodiversity Conservation Act 1999

EPL Environment Protection Licence

ERSED Control Erosion and Sediment Control

ESCP Erosion and Sediment Control Plan

ER Environmental Representative

JH John Holland

MNES Matters of National Environmental Significance

NOW NSW Office of Water (a division of the NSW Department of Primary Industries)

NPW Act National Parks and Wildlife Act 1974

NSW New South Wales

PM Project Manager

POEO Act Protection of the Environment Operations Act 1997

SEP Site Environment Plan


Term Definition

SQE Safety, Quality and Environment

SQERM Safety Quality and Environment Risk Management

Project Infrastructure Approval

Infrastructure Approval SSI-5039 and accompanying Conditions of Approval (CoA), dated 27 February 2014

Project EIS

Environmental Impact Statement (EIS) for the Chaffey Dam Augmentation and Safety Upgrade prepared by Worley Parson, dated 07 December 2012 and Preferred Infrastructure Report (PIR) for the Chaffey Dam Augmentation and Safety Upgrade prepared by WorleyParsons, dated 15 March 2013

SSI Chaffey Dam Safety Upgrade and Augmentation project

The Proponent State Water Corporation

TRA Task Risk Assessment

WRA Workplace Risk Assessment


Table of Contents

................................................................................................................................................... 1

Terms and Definitions .............................................................................................................. 2

1. Introduction ..................................................................................................................... 6

1.1 Purpose and Application .......................................................................................... 6

1.2 Background .............................................................................................................. 6

1.2.1 Project Layout and Work Areas .................................................................... 7

1.3 Soil and Water Objectives ........................................................................................ 7

1.4 Environmental Management Documentation ............................................................ 8

1.5 Review and Ongoing Development .......................................................................... 8

1.6 Consultation ............................................................................................................. 9

2. Legal and Other Requirements ...................................................................................... 9

2.1 Legislation ................................................................................................................ 9

2.2 Guidelines and Standards ........................................................................................ 9

2.3 Licensing and Approvals ........................................................................................ 10

2.3.1 Environment Protection Licence ................................................................. 10

3. Roles and Responsibilities ........................................................................................... 10

4. Existing Environment ................................................................................................... 11

4.1.1 Existing Geology and Soil Landscape ......................................................... 11

4.1.2 Hydrology ................................................................................................... 11

4.1.3 Water Quality .............................................................................................. 12

5. Aspects and Potential Impacts ..................................................................................... 13

6. Management of Soil and Water Construction Impacts ............................................... 13

6.1 Site Specific Erosion and Sediment Control Plans ................................................. 15

6.2 Temporary Drawdown of Dam Water ..................................................................... 15

6.3 Construction Water Management – Sediment Basins............................................. 15

6.4 Surface Water Reuse and Discharge ..................................................................... 15

6.5 Borrow Areas ......................................................................................................... 16

6.6 Watercourse Crossings .......................................................................................... 16

6.7 Chemicals, Refuelling and Spill Management ........................................................ 16

6.8 Contaminated Materials Management .................................................................... 17

6.9 Management of Sewage ........................................................................................ 17

7. Training, Monitoring and Reporting ............................................................................. 17

7.1 Training .................................................................................................................. 17

7.2 Monitoring .............................................................................................................. 17

7.3 Reporting ............................................................................................................... 18

8. Non-Conformance and Corrective Action ................................................................... 18

Appendix 1 – Refuelling Procedure ...................................................................................... 19

Appendix 2 - Spill Response Procedure ............................................................................... 20

Appendix 3 – Water Reuse and Discharge Procedure ......................................................... 21


Treatment of Water Quality ............................................................................................. 22

Appendix 4 – Contamination ................................................................................................. 23

Appendix 5 Compliance Matrix ............................................................................................. 24

List of Tables

Table 1 - Roles and Responsibilities......................................................................................... 11

Table 2 - Aspects and Impacts ................................................................................................. 13

Table 3 - Mitigation Measures .................................................................................................. 14

Table 4 – Water Quality Objectives .......................................................................................... 16

Table 5 - Monitoring ................................................................................................................. 18

List of Figures

Figure 1 – Environmental Management Documentation ............................................................. 8

Figure 2 - Namoi Catchment .................................................................................................... 12


1. Introduction

1.1 Purpose and Application

This Soil and Water Management Plan (the Plan) is a key element of the overall Construction Environmental Management Plan (CEMP) and describes how John Holland will manage obligations and performance with regards to aspects and potential impacts associated with soil and water during the construction of the Project.

This Plan has been developed to ensure the requirements of the Project Infrastructure Approval, associated environmental documentation and contract requirements are satisfied to ensure the successfully delivery of the Chaffey Dam Safety Upgrade and Augmentation. This plan is applicable to the construction phase of the project.

1.2 Background

This Plan has been developed based on the Environmental Impact Statement (EIS) for the Chaffey Dam Augmentation and Safety Upgrade prepared by Worley Parson, dated 07 December 2012 and the Preferred Infrastructure Report (PIR) for the Chaffey Dam Augmentation and Safety Upgrade prepared by WorleyParsons, dated 15 March 2013 which takes into consideration a comprehensive assessment and analysis which details soil and water risks and proposed methods to manage, mitigate or minimise the potential impacts.

The potential soil and water impacts associated with the construction of the Project include the following

► Surface water impacts due to construction activities (working above water)

► Inundation of upstream land and tributaries

► Erosion and sedimentation

► Construction waste including spoil management/contamination and transport

► Flood flows


1.2.1 Project Layout and Work Areas

1.3 Soil and Water Objectives

The following soil and water objectives apply to the construction phase of the Project

► SSI shall be constructed to comply with Section 120, of the Protection of the Environment Operations Act 1997


1.4 Environmental Management Documentation

This Plan forms a key element of the environmental management documents for the Project as shown below.

Figure 1 – Environmental Management Documentation

1.5 Review and Ongoing Development

The Plan will be reviewed annually and/or under the following conditions –

► Significant change to the Scope of Works

► If required as a result of an audit or incident

Environmental

Assessment

Conditions of

Approval

Relevant

Legislation

Construction Environment Management Plan (DPE Approved)

Construction Environmental Management Sub Plans

► Biodiversity Management Plan (DPE Approved)

► Soil and Water Management Plan (DPE Approved)

► Dust and Air Quality Management Plan (DPE Approved)

► Construction Noise and Vibration Management Plan (DPE Approved)

► Construction Traffic Management Plan (DPE Approved)

► Heritage Management Plan (DPE Approved)

► Recreational Use Management Plan (DPE Approved)

► Waste Management and Recycling Plan

► Community Communication Strategy(DPE Approved)

► Dam Spill Management Plan(DPE Approved)

Environmental Management Procedures

► Refuelling Procedure

► Spill Management Procedure

► Dewatering and Discharge Procedure

► Contamination Management Procedure

Environmental Management Documents and Records

► Compliance Tracking Program

► Dewatering and Discharge Records

► Water Monitoring Records

► ERSED Control Plans

► Activity Method Statements

► Site Environmental Plans (SEPs)

Environmental

Impact Statement


► If State Water or the Environmental Representative formally requests the change

► If the Project Manager determines that it is appropriate

1.6 Consultation

The following stakeholders have been consulted in the preparation of this Soil and Water Management Plan

Stakeholder Dates

OEH Review of DRAFT Management Plan 07/08/2014

North West LLS Review of DRAFT Management Plan 06/08/2014

EPA Review of DRAFT Management Plan 06/08/2014

NOW (NSW Office of Water and NSW Fisheries) Review of DRAFT Management Plan 13/08/2014

Consultation has been carried out and the opportunity to review and provide comment on this plan.

The Erosion and Sediment Control Plans are in Appendix 6 of the Construction Environmental Management Plan (CEMP), these plans will be updated as the works progressed and reviewed by the Environmental Representative.

Erosion and Sediment Control Plan Section

Sheet 1 Road Alignment 1 Bowling Alley Point (now complete)

Sheet 2 Road Alignment 2 Bowling Alley Point (now complete)

Sheet 3 Road Alignment and Bridge BAP (now complete)

Sheet 4 Bridge and Site Sheds Bowling Alley Point (now complete)

Sheet 5 Crushing Area and Haul Road

Sheet 6 Main Site Office

2. Legal and Other Requirements

2.1 Legislation

The following legislation is applicable to soil and water management for the Project –

► Environmental and Planning Assessment Act 1979

► Protection of the Environment Operations Act 1997

► Contaminated Land Management Act 1997

► Soil Conservation Act 1938

► Water Management Act 2000

► Fisheries Management Act 1994

2.2 Guidelines and Standards

The following guidelines and standards relating to soil and water management have been referenced during the development of this Plan –

► Managing Urban Stormwater: Soils and Construction, Volume 1, 4th Edition (Landcom 2004) (Blue Book)


► NSW State Groundwater Quality Protection Policy (Department of Land & Water Conservation 1998)

► ANZECC (2000) Australian and New Zealand Guidelines for Water Quality Monitoring and Reporting (collectively known as the “ANZECC Guidelines’)

► Bunding and Spoil Management (EPA 1997)

► Waste Classification Guidelines (DECC 2008c)

► AS 1940:2004 The Storage and Handling of Flammable and Combustible Liquids

2.3 Licensing and Approvals

2.3.1 Environment Protection Licence

An Environment Protection Licence (EPL) under the is required for the construction of the Project due to it being classed as a Scheduled Activity “Extractive Activities” and “Crushing, Grinding and Separating” under Schedule 1 of the Protection of the Environment Operations Act 1997 POEO Act.

The EPL will include a number of conditions relevant to soil and water management and this Plan will be updated to reflect the EPL conditions. In accordance with the POEO Act ‘waters’ is defined as the whole or part of –

► Any river, stream, lake, lagoon, swamp, wetlands, unconfined surface water, natural or artificial watercourse, dam or tidal waters (including the sea), or

► Any water stored in artificial works, any water in water mains, water pipes or water channels, or any underground or artesian water.

Section 120 of the POEO Act states that it is illegal to pollute waters. Under the POEO Act, ‘water pollution’ includes introducing litter, sediment, oil, grease, wash water, debris, and flammable liquids such as paint into waters or placing such material where it is likely to be washed down or blown into waters or the stormwater system or percolate into groundwater.

3. Roles and Responsibilities

All Project personnel including subcontractors have a role in ensuring that the strategies and procedures set out in this Plan are implemented. Key roles and responsibilities have been outlined below –

Role Responsibilities

Project Manager

► Ensuring appropriate resources are available for the implementation and maintenance of appropriate soil and water management initiatives

Environment Manager

► Providing assistance and advice to all Project personnel to fulfil the requirements of this Plan

► Overseeing the implementation of soil and water management initiatives

► Ensuring appropriate training and awareness programs are developed and implemented

► Liaising with relevant authorities and organisations as necessary

Senior Project Engineer

► Liaising with the Environmental Manager (EM) to ensure appropriate corrective and preventative actions are developed and implemented in accordance with this Plan whilst maintaining constructability


Role Responsibilities

Superintendent and Supervisors

► Managing and / minimising impacts associated with soil and water as a result of construction activities

► Ensuring personnel are fully briefed on the relevant soil and water management requirements prior to work commencing

► In the event of identified potential or actual breaches, implementing appropriate corrective or preventative actions

Project and Site Engineers

► Ensuring that appropriate soil and water management measures are implemented and maintained on site

► Developing Activity Method Statements and Task Risk Assessments consultation with the EM and construction personnel

Construction Personnel ► Informing the supervisor of any soil and water management issues as they rise.

Table 1 - Roles and Responsibilities

4. Existing Environment

4.1.1 Existing Geology and Soil Landscape

Chaffey Dam is located within the Peel River Valley, which covers an area of approximately 4,669 km2 (NSW Office of Water 2010a). The Peel River Valley is a highland valley that drains onto the plains of the sedimentary basin of the Upper Namoi River and is part of the wider Namoi River Valley. The Peel River Valley is characterised by low peaked hills with a north-westerly alignment, moderate slopes and flat river valleys with deep fertile alluvial soils. Chaffey Dam is located on a steep to vertically dipping jasper and siltstone strata of the Woolomin Beds. The major bedrock lithologies comprise siltstone, jasper-chert and interbedded jasper-chert and siltstone in varying proportions. Broadscale soil mapping (AUSLIG 1990) shows that the Project Site lies within the Nandewar bioregion. The Nandewar bioregion is dominated by shallow and stony sandy loams, associated with the granites, sediments, red brown earths and black cracking clays, associated with volcanic substrate (DEC 2004). Less widespread soils include deep alluvial loams. Deeper, more fertile soils occur at lower elevations along the valley floors, while shallow and less fertile skeletal loams occur on of the steeper slopes and ridges (DEC 2004).

Soil landscapes in the vicinity of the Project Site are mapped as saline scalded lake bed clays, with deep alluvial loams to the west and southwest (Natural Resource Atlas 2012).

4.1.2 Hydrology

Chaffey Dam is located on the Peel River downstream of the village of Nundle. It is situated in the upper south-eastern section of the Namoi River Catchment, Figure 1. The dam has an upstream catchment area of 420 km2 with the headwaters draining rugged topography of the Great Dividing Range (GHD 2007b). The Peel River downstream of Chaffey Dam can be described as a low to moderate sinuosity gravelbed river. Channel bed morphology is characterised by a pool-riffle sequence set within a relatively consistent channel that is typically 30 to 40 m wide and 3 to 6 m deep (GHD 2007b).

Three major tributaries enter the Peel River between Chaffey Dam and Tamworth. These are:

► Duncan’s Creek, which enters the Peel River approximately 5 km downstream of the dam and has a catchment area of 93 km2;


► Dungowan Creek, which enters the Peel River at Woolomin, approximately 15 km downstream of the dam and has a catchment area of 344 km2; and

► Cockburn River which enters the Peel River just upstream of Tamworth and has a catchment area of approximately 1,130 km2.

Figure 2 - Namoi Catchment

4.1.3 Water Quality

Water quality in the Namoi Catchment is affected by nutrients, in particular phosphorous and nitrogen. The following items have been identified as likely sources of nutrients within the catchment:

► Silt erosion

► Natural phosphate deposits in the catchments

► Recreational activities

► Stormwater runoff

► Agriculture discharge (livestock waste and fertiliser)

The combination of heavy summer rainfall events and the steep, sparsely vegetated catchment create high rates of sediment erosion in the region.

High nutrient loading into Chaffey Dam from the upstream catchment has the potential to promote eutrophication. The dissolved phosphorous in the water column is predominantly orthophosphate (PO4), which is the most bio-available form to algae. Hence, algal blooms are often comprised of toxic cyanobacteria such as Anabaena and Microcystis, which can occur throughout the year (GHD 2008b; Molino Stewart 2011). This internal nutrient source occurs primarily during the summer with the development of anoxic conditions at the sediment-water interface.

The occurrence of algal blooms and the development of anoxic conditions are in large part driven by thermal stratification, which occurs throughout most of the year except during winter in Chaffey Dam (GHD 2008b).


State Water currently implements actions to manage the foreshore of Chaffey Dam, as well as downstream water quality, in accordance with the recommendations of the Report for Site Specific Action Plans Chaffey (GHD 2010) (also known as the Chaffey Dam Foreshore Management Plan).

5. Aspects and Potential Impacts

The key aspects and potential impacts in relation to the management of soil and water are listed in Table 2 below –

Table 2 - Aspects and Impacts

Aspect Potential Impact

Discharge of contaminated water from within site boundary

Contamination of adjacent watercourse and riparian environment. Poor quality water entering waterways and riparian environment impacting on water quality and ecosystem function

Erosion Sediment degrading surrounding environment

Increase turbidity for downstream users

Draw down of water during Morning Glory Spillway construction

Reduce water availability to downstream users

Flood flows

Contamination of floodwaters by sewage, fuels and/or chemicals onsite

These flows have the potential to cause damage to formwork used to construct the new spillway and the loss of timber and metal formwork materials into the reservoir and potentially through the morning glory spillway

Hazardous substances spills/leaks

Contamination of soil

Contamination of watercourses, riparian environment and groundwater ecosystems

Sediment-laden runoff Runoff entering creeks and drainage lines causing pollution

Sediment tracking onto public roads Potential impact on traffic safety

Potential for sediment to be washed into stormwater systems

Working above water i.e.. Morning Glory Spillway / Bridge construction

Pollution to waters

Sewage overflows from compounds

Contamination of soil

Contamination of watercourse, riparian environment and groundwater ecosystems

6. Management of Soil and Water Construction Impacts

All construction works around the perimeter of the reservoir, including work on the dam embankment and road realignments will cause ground disturbance. Mitigation measures to be undertaken to manage soil and water impacts during construction are detailed in Table 3 below.


Table 3 - Mitigation Measures

Mitigation Measure Project Phase

A Sediment and Erosion Control Plan (ESCP) will be developed and implemented, and will include, as a minimum:

► Use of silt fences, drains and sediment traps as relevant throughout ground disturbing

works

► Use of silt curtains where ground disturbing works are being carried out near or adjacent

to waterways

► Use of silt curtains where works are being carried out to the top or upstream

embankment of the dam wall

► Regular checking of sediment and erosion control devices, including after heavy rainfall

► Cleaning or replacement of sediment and erosion control devices as required

Construction

Existing cleared, disturbed and sealed areas will be identified and used preferentially for vehicle and machinery access, materials laydown and stockpiling wherever practicable to minimise disturbance to native vegetation, including areas of derived grassland

Construction

Off road driving will be minimised as far as practicable and will be limited to within designated works areas Construction

Topsoil will be separated from subsoil during excavation and replaced as the top soil layer upon backfilling or reused elsewhere for rehabilitation

Construction

Excavations will be backfilled as soon as practicable Construction

The extent of soil disturbance will be minimised and rehabilitation will be undertaken as soon as practicable following completion of works at each location

Construction

Rehabilitation will incorporate revegetation with native species of local provenance to stabilise soils and reduce erosion

Construction

Namoi CMA will be consulted during the preparation of the Sediment and Erosion Control Plan and during the revision of the Foreshore Management Plan

Construction

Sediment and erosion control devices will be checked regularly, including after heavy rainfall and cleaned or replaced as required.

Construction

All concrete pours and bitumen use will be appropriately supervised Construction

Placement of bitumen products will be restricted to periods where there is expected to be at least two days of dry weather after their application

Construction

If the reservoir is at or near FSL at the commencement of construction, the reservoir will be temporarily lowered to 2 m below FSL to provide construction access and flood protection, in accordance with any NSW Office of Water requirements

Construction

The use of heavy machinery on areas that are outside of the area of direct impact and excavation works will be avoided during, and immediately following heavy rainfall events to protect soils from erosion and compaction

Construction

Floating booms shall be utilised during activities adjacent to or over water where the potential exists for sediment, hydrocarbon leaks or spills to enter water

Construction

The extent of soil disturbance will be minimised and rehabilitation will be undertaken as soon as practicable following completion of works at each location.

Construction

Rehabilitation will incorporate revegetation with native species of local provenance to stabilise soils and reduce erosion.

Construction

Trimmed and cleared vegetation should be spread over construction areas that are above the new FSL during rehabilitation to assist in stabilisation and revegetation of the area and to minimise erosion and sedimentation. .

Construction

The Contractor will maintain the works areas in a clean and tidy fashion. Construction


6.1 Site Specific Erosion and Sediment Control Plans

Site specific Erosion and Sediment Control Plans (ESCPs) have been developed for each of the construction areas as per Appendix 6 of the CEMP, as construction progresses the controls required may change, the plans will be reviewed and updated when required during the course of the construction. The Environmental Representative will review the amendments during their inspections. All ESCPs will require sign off by the Environment Manager and a Site Supervisor prior to implementation.

Each ESCP will be prepared in accordance with Volume 2D of Managing Urban Stormwater: Soils and Construction (DECC 2008). The Erosion Sedimentation Control Plans will detail

i. access and haulage tracks

ii. borrow pits

iii. stockpile and storage areas

iv. temporary work areas

v. material processing areas

vi. compound areas

vii. concrete and asphalt batching areas

6.2 Temporary Drawdown of Dam Water

During the construction works associated with the raising of the Morning Glory Spillway and to reduce the risk of flood flows through the spillway water levels need to remain below 516.6m AHD.

Temporary drawdown will only be required if the water level at the time of construction is above 516.6m AHD, or if long term weather projections show a risk of the water levels rising. State Water Corporation will apply under the Water Management Act 2000 to vary Water Supply Approval 90WA819132.

6.3 Construction Water Management – Sediment Basins

Erosion and sedimentation controls will be designed in accordance with Landcom’s Managing Urban Stormwater, Soils and Construction (2004) (the Blue Book).

Sediment basins will be ideally positioned at natural low points in the landscape and/or proposed low points in the proposed road realignment. Ideally, sediment basins should be outside the footprint of any cuts/ fills to enable safe and efficient construction which lowers the risk of uncontrolled discharge of construction water from the site.

It is not desirable to establish sediment basins within the footprint as it affects the quality of fill compaction and greatly impacts on the safe and efficient movement of machinery.

Sediment basin locations will be illustrated in the Erosion and Sediment Control Plans.

6.4 Surface Water Reuse and Discharge

Any surface water emanating from the Project site will be stored, filtered and treated prior to being discharged onto adjacent land areas or waterways.

Discharging water from sedimentation basins within the Project will be required to ensure that sufficient storage capacity is available in the event of wet weather. Where practicable, water from sedimentation ponds will be reused within the premises e.g. dust suppression, watering revegetated areas. All water reuse or discharge will be undertaken in accordance with the Dewatering and Discharge Procedure, Appendix 3.


Testing and, where necessary, treatment of water captured within sedimentation basins, in excavations or in sealed container(s) will be undertaken. Prior to any discharge off the premises or reuse within the premises, the EM or authorised delegate(s) is to signoff that the water is suitable for reuse or discharge as per the Dewatering and Discharge Checklist, Water Quality Objectives (WQO) that are specified in the Table below.

Table 4 – Water Quality Objectives

Discharge to Stormwater / Watercourse Dispersed Discharge to Land

Water Parameter Objective Units Objective Units

pH 6.5 – 8.5 pH 6.5 – 8.5 pH

Total Suspended

Solids (mg/L) < 50 TSS N/A N/A

Hydrocarbons No hydrocarbon sheens observed N/A No hydrocarbon sheens observed N/A

6.5 Borrow Areas

Borrow areas for core material will be restricted to land above the 20 year ARI flood level at a distance of greater than 30meters from the waterway. Borrow pits will be backfilled with suitable material to natural bed levels and revegetated.

Any variation will require a demonstration of how borrow areas can be managed to limit future erosion, scouring and channel alignment during high flow periods.

6.6 Watercourse Crossings

Watercourse crossings will be designed in consultation with NOW and/or NSW Fisheries and are consistent with the following -

► Guidelines for Watercourse Crossings on Waterfront Land (NSW Office of Water, 2012)

► Policy and Guidelines for Fish Friendly Waterway Crossing (NSW Fisheries, February 2004)

► Policy and Guidelines for Design and Construction of Bridges, Roads, Causeways, Culverts and Similar structures

Appendix 6 details the Construction of the downstream Peel Creek Crossing and consultation undertaken with NOW.

6.7 Chemicals, Refuelling and Spill Management

The use, storage and handling of fuels, oils, chemicals and other dangerous goods will be undertaken in accordance with all relevant legislation, manufacturers’ instructions and the relevant Material Safety Data Sheets (MSDS).

Bunding and spill management will be undertaken according to requirements within:

► AS 1940:2004 The Storage and Handling of Flammable and Combustible Liquids;

► Storing and Handling Liquids: Environmental Protection Participant’s Manual (DECC, 2007); and

► Environmental Compliance Report: Liquid Chemical Storage, Handling and Spill Management – Part B Review of Best Practice and Regulation (DECC, 2005)

Activities with the potential for spillage (such as refuelling and the maintenance of equipment) and potentially hazardous and contaminating activities (such as washing construction plant and handling hazardous chemicals) will be conducted away from watercourses and when suitable


containment, treatment and disposal measures are in place. The location and size of spill kits will be detailed on Site Environmental Plans.

The following relevant procedures have been developed for the Project:

► Refuelling Management Procedure - Appendix 1

► Spill Response Procedure - Appendix 2

Static plant such as pumps my require refuelling within the 40 meter limit. The fuel will be taken to the site in a bunded container and only what is required to refuel the plant. Spill kits will be at the site of refuelling and a funnel will be used for refuelling. An oil only boom is located at the Bowling Alley Point Coffer Dam and in the event of a spill will be used to collect oil from the water. If there is likelihood of high rains or elevated river levels the static plant will be removed to higher ground.

The 160 Tonne crawler crane operating at the Morning Glory Spillway (MGS) is not practical to be moved 40 meters away from the dam water for refuelling. A concrete lined bund will be constructed for the crane to reverse into and be refuelled by a double skinned fuel truck. Silt booms are in the dam that will trap spills prior to the inlet of the MGS and hydrocarbon marine booms and spill kits are located in the area for containment and clean-up. This is detailed in Site Environmental Plan JH-C680-SEP-006 Morning Glory Spillway

6.8 Contaminated Materials Management

Any unexpected contaminated material encountered will be handled in accordance with the Contamination Chance Find and Management Procedure, Appendix 4.

6.9 Management of Sewage

The Project site will require the use of temporary site ablution facilities with effluent tanks. Details of locations for sewage connections and effluent tanks will be provided in Site Environmental Plans (SEPs).

7. Training, Monitoring and Reporting

7.1 Training

Personnel will receive training appropriate for their role in Soil and Water Management on the project. Ongoing toolbox talks on the requirements of soil and water management will raise awareness to the wider project team.

Personnel within the Construction team will be responsible for the on-ground installation and maintenance of erosion and sediment controls.

This will include:

► Sediment basin maintenance, including flocculation and discharge (pending authority to discharge from the Environment Manager or their delegate)

► Installation, cleaning and maintenance of controls such as sediment fences, gravel socks, inlet filters, straw bales and sandbags

► Spill kit training

► Installation of temporary drain and channel liners (e.g. geo-fabric and jute matting)

► All dewatering activities

7.2 Monitoring

In order to mitigate identified impacts JH will ensure appropriate environmental controls and


management procedures are implemented during construction activities. This will be implemented through pro-active soil and water management to minimise potential impacts to the local community and sensitive environmental areas. The following erosion and sediment monitoring will be implemented –

Table 5 - Monitoring

Activity Area Resource Responsibility Frequency

Visual Sediment Control

Measures Supervisors

Diary

Environment

Manager

Site Supervisors

Daily during rainfall events

Within 24hrs of the cessation of rainfall event causing runoff to occur on or from the premise

Weekly Environment

Inspection

Sediment Control Measures

Weekly Environment

Inspection Checklist

Environment Manager

Weekly during normal construction hours

ER Inspections All ER Inspection

Checklist Environment

Representative TBA

Discharge Contained Water Discharge Procedure

Environment Manager

Before Discharge

Rainfall Site BoM Environment

Manager Daily

Rainfall > 5 mm Temporary Bridge

Downstream Bom/Visual

Supervisor / Environmental

Manager

There will be a visual check at the temporary bridge for turbid water entering the Peel River.

If turbid water is entering the river there will be water testing

for SS downstream

Documents specific to the management of soil and water are detailed below -

► Water Discharge and Reuse records

► Spoil classification records and reports

► Site Environmental Checklist

► Community Complaints/Inquiry form

► Inspection Test Plans for earthworks, drainage and landscaping

► Weather records

7.3 Reporting

Erosion and sediment control will be recorded and provided to the EPA in accordance with the EPL.

8. Non-Conformance and Corrective Action

Procedures for Non-conformance and Corrective Actions are addressed in the Construction Environmental Management Plan (CEMP), Section 5.5.


Appendix 1 – Refuelling Procedure

Refuelling

Ensure spill kits are available and inspect

hoses/pumps for leaks and breakages

Maintain a 40m buffer zone from waterways

Refuel from bulk storage tank or mobile fuel

truck

In the event of a spill – refer to Spill Response

Procedure

Monitor hose

connections for

leakage

Ensure sufficient

capacity in

storage tank for

hose draining

Drain hoses on

completion of

refuelling and

close filling valves

Refuelling

operations to be

supervised at all

times

When refuelling

from mobile fuel

truck, only the

driver is to operate

the fuel pump


Appendix 2 - Spill Response Procedure

Spill Occurs

Control

Stop the source of the spill / leak if it is safe to

do so with the spill kit. PPE as required

Follow the Incident

Response Procedure

for details on notification

requirements

(Emergency Response

Plan)

No Yes

Protect Drains / Waterways

Protect drains, channels or other pathways for

environmental release to waterways. Do Not

Let Spill Go Off Site or enter waterways

Notify EM

Quantity of the

substance spilt?

What is the type of

substance? Refer to

MSDS.

What is the potential

impact on the

environment, and

the health and

safety of personnel?

Place in yellow

waste bag found

within spill kit.

These are then to

be disposed of to

the contaminated

waste bin

Transport and

disposal by licensed

contractor (if

required)

Contain

Absorbent materials from spill kit (i.e booms,

pads, pillows, granules etc);

Sand bagging, earth bund or silt sausages;

Replace Spill Kit Components

Notify your supervisor, Supervisor and/or EM to:

► Record the incident

► Ensure clean up materials are replaced

► Implement non-conformance and corrective

actions

Spill Clean Up

Follow EM direction for clean up and disposal

Initial Assessment of Situation

Is there any danger to you or others in

attempting to control the spill?


Appendix 3 – Water Reuse and Discharge Procedure

Environmental Manager

Superintendent / Supervisor


Superintendent

Supervisors


Superintendent / Supervisor

Training

► Water Management included in project induction and ongoing toolbox training

► Erosion/Sed Control training

Reduce the Volume of water on site

► Divert surface run-off around excavations / concrete wash outs using earth mounds, temporary drains etc

Discharge off the premises

HOLD POINT

► Testing and where necessary treatment (Refer next page) of all water must be undertaken prior to discharge from the premises. This may occur within excavation or the sediment basin

► Prior to any water discharge from the premises contact the EM or delegate who will sign off the hold point once water is suitable for discharge.

- Appropriate scour protection of the offsite discharge

► Record all details on the Dewatering and Discharge Checklist

Water Reuse on Site

HOLD POINT

► Prior to any water reuse on the premises contact the EM who will sign off the hold point confirming criteria has been met

► Record all details on the Dewatering and Discharge Checklist

Responsibility


Treatment of Water Quality

pH levels outside WQO

► pH under WQO, need to increase the pH by adding a base such as agricultural lime. Note. Aglime can take time to become soluble. Other, more soluble products may be available, but ensure you don't overshoot the pH.

► pH over WQO, need to lower the pH by adding hydrochloric acid. As a guide, 500mL hydrochloric acid lowers 7000L of water by a pH of approximately 1.5pH. To apply the acid safely all safety requirements specified in MSDS and Safety Plans must be followed.

► When adjusting water levels any additive should be even dispersed throughout. Limit the amount of adjustments done as this may affect other water qualities. Determine the correct adjustment amounts first and apply accordingly and sparingly.

Turbidity outside WQO

► Either wait for the water to settle naturally or floc the water to speed up the process. Treating water with flocculent (e.g. gypsum, liquid alum or flocculent blocks) will make the sediments drop to the bottom. Where possible, follow manufacturer’s instructions in the first instance.

► Gypsum: Can take 48hrs+ to act, should be dissolved into a slurry before dispersed into a holding tank/pond to increase its absorption/solubility. Dosing rates of 30kg per 100m3 (100,000L) can be used as a guide. Quantities should be tested prior in a sample bucket or drum.

► Liquid Alum: Faster acting, however Alum in acidic waters can become toxic and cause environmental damage. Be sure to check pH, it must be above 5.5 after treatment regardless of use. Some areas require a residual Alum test prior to release.

► Floc blocks: Can be situated in flow paths to ensure incoming water is dosed with flocculent as it enters holding pond/tank, fine tuning of flocculent can then be completed on the pond/tank. Floc blocks should not be left permanently in a pond/tank, instead they should be in a flow path leading to the pond/tank that is dry when no water is flowing into the system.

► Synthetic flocculants: Many products are available for floccing purposes, when using other products, ensure they are environmentally friendly and suitable for your application.

► Always re-test pH levels after you have allowed the flocculent to work and adjust accordingly. Most flocculants will lower the pH level and lime may be required. Avoid overfloccing.

► Remaining flocced sediment can turn into a thick jelly consistency over time. If pH levels are acceptable and no visible hydrocarbons, this sediment may be thinly dispersed somewhere on-site and seeded.


Appendix 4 – Contamination

Unexpected discovery of potentially contaminated material

Stop work immediately in the area of potential contamination

and inform the Environment Manager

EM to classify the waste in accordance with the Waste

Classification Guidelines (DECCW, 2009)

If relevant, the EM will notify and consult with authorities and

specialist consultants to determine suitable management

options

EM shall determine appropriate management (disposal or

treatment) measures.

Proceed with construction excavations following approval to

do so

Set aside potential contaminated material and recommence

works in alternate area


Appendix 5 Compliance Matrix

No. SSI-5039 Infrastructure Approval

Condition / Commitment

Implementation Stage Pre-

Construction (P),

Construction (C), Operation

(O)

Implementation Plan Document Reference OR

Documents to be Produced Responsibility

P C O

B25

Except as may be provided by an EPL issued for this SSI, the project shall be constructed and operated to comply with Section 120 of the Protection of the Environment Operations Act 1997, which prohibits the pollution of waters.

C Incorporate requirements of condition into Soil and Water Management Plan

Section 2.3 – Licensing and Approvals

JH

B26

Soil and water management measures consistent with Managing Urban Stormwater - Soils and Construction Vols 1 (Landcom, 2004) shall be employed during the construction of the SSI to minimise soil erosion and the discharge of sediment and other pollutants to land and/or waters.


Soil and Water Management Plan / ERSED

JH

B27

Borrow areas for core material shall be restricted to land above the 20 year ARI flood level at a distance of greater than 30 metres from the waterway. Borrow pits must be backfilled with suitable material to natural bed levels and revegetated in accordance with Condition C2 a)(ii). Any variation to this requirement must demonstrate how borrow areas can be managed to limit future erosion, scouring and channel alignment during high flow periods.

Incorporate requirements of condition into Soil and Water Management Plan

Section 6.5 – Borrow Areas State Water JH





Construction (P),


(O)



B28

Watercourse crossings shall be designed in consultation with DPI (NOW and/or NSW Fisheries) and, where feasible and reasonable, be consistent with the Guidelines for Watercourse Crossings on Waterfront Land (NSW Office of Water, 2012), Policy and Guidelines for Fish Friendly Waterway Crossings (NSW Fisheries, February 2004) and Policy and Guidelines for Design and Construction of Bridges, Roads, Causeways, Culverts and Similar Structures (NSW Fisheries 1999). Where multiple cell culverts are proposed for creek crossings, at least one cell shall be provided for fish passage, with an invert or bed level that mimics creek flows.


Section 6.6 - Watercourse Crossings State Water JH

C2 b)

The Proponent shall ensure that the following specific requirements are considered in developing the sub-plans or procedures identified in condition C1, further to any guidelines contained within the Guideline for the Preparation of Environmental Management Plans (Department of Planning, Infrastructure and Natural Resources 2004): b) Soil and Water, to be prepared in consultation with OEH, EPA, North West LLS, and DPI (NSW Office of Water and NSW Fisheries) and include the following:

P C Incorporate requirements of condition into CEMP (or Sediment and Erosion Control Plan).

Section 1.6 - Consultation State Water JH

(i) a description of measures to minimise soil erosion and the potential for the sediment transport to the reservoir and upstream and downstream waters in accordance with the Managing Urban Stormwater – Soils and Construction Vols 1 (Landcom, 2004); and

C Incorporate requirements of condition into CEMP (or Sediment and Erosion Control Plan).

Soil and Water Management Plan (This Plan)

JH





Construction (P),


(O)



(ii) contingency and ameliorative measures in the event that adverse impacts to water quality are identified.

C Incorporate requirements of condition into CEMP (or Sediment and Erosion Control Plan).

CEMP Incident Reporting JH

Soil and Water Management Plan€¦ · Soil and Water Management Plan Page 1 of 26 John Holland ......

Documents

Transcript of Soil and Water Management Plan€¦ · Soil and Water Management Plan Page 1 of 26 John Holland ......