Rehabilitation of the Boksburg Lake: Draft Environmental Management Programme (draft EMPr) - Ekurhuleni Metropolitan Municipality (EMM) - SRK ...
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Rehabilitation of the Boksburg Lake: Draft Environmental Management Programme (draft EMPr) Report Prepared for Ekurhuleni Metropolitan Municipality (EMM) Report Number 498275/Draft EMPr Report Prepared by September 2018
SRK Consulting: 498275: Rehabilitation of the Boksburg Lake: Draft EMPr Page i
Rehabilitation of the Boksburg Lake: Draft
Environmental Management Programme (draft
EMPr)
Ekurhuleni Metropolitan Municipality (EMM)
100 Plane Rd
Spartan
Johannesburg
620
SRK Consulting (South Africa) (Pty) Ltd.
Block A, Menlyn Woods Office Park
291 Sprite Avenue
Faerie Glen
Pretoria 0081
South Africa
e-mail: pretoria@srk.co.za
website: www.srk.co.za
Tel: +27 (0) 12 361 9821
Fax:+27 (0) 12 361 9912
SRK Project Number 490243/Draft EMPr
September 2018
Compiled by: Peer Reviewed by:
Ndomupei Masawi Manda Hinsch
Senior Environmental Scientist Partner
Email: nmasawi@srk.co.za
Authors:
Ndomupei Masawi
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Table of Contents
Disclaimer..................................................................................................................................................... v
List of Abbreviations .................................................................................................................................... vi
1 Introduction and Scope of Report............................................................................... 1
1.1 Background ......................................................................................................................................... 1
1.2 Purpose of the Environmental Management Programme (EMPr) ...................................................... 4
1.3 Report Index in Relation to the NEMA Regulations ............................................................................ 4
2 Project Team ................................................................................................................. 7
2.1 Details and Expertise of the Environmental Assessment Practitioner (EAP) ..................................... 7
3 Project Details .............................................................................................................. 8
3.1 Project Description .............................................................................................................................. 8
3.2 Construction Methodology ................................................................................................................ 13
3.2.1 Site Establishment................................................................................................................. 13
3.2.2 Low Crest Weir ...................................................................................................................... 13
3.2.3 Concrete Works for the proposed Wastewater Processing Package Plant .......................... 13
3.3 Services ............................................................................................................................................ 14
3.3.1 Water for Construction Purposes .......................................................................................... 14
3.3.2 Power .................................................................................................................................... 14
3.3.3 Sanitation .............................................................................................................................. 14
3.3.4 Contractors Camp and Laydown Area .................................................................................. 14
3.3.5 Access Roads. ...................................................................................................................... 14
3.3.6 Stockpiles of Raw Materials ..................................................................................................14
3.4 Fuel Storage...................................................................................................................................... 14
3.5 Construction Materials ...................................................................................................................... 14
3.6 Employment ...................................................................................................................................... 15
3.7 Occupational Health and Safety ....................................................................................................... 15
4 Organisational Structure ........................................................................................... 16
4.1 Reporting Relationships .................................................................................................................... 16
4.2 Staffing Requirements ...................................................................................................................... 16
4.3 Roles, Responsibility and Compliance Monitoring Requirements .................................................... 17
4.3.1 Gauteng Department of Agriculture and Rural Development (GDARD) ............................... 17
4.3.2 Ekurhuleni Metropolitan Municipality (EMM) ......................................................................... 17
4.3.3 Engineer and Engineer’s Representative.............................................................................. 17
4.3.4 Contractors Representative .................................................................................................. 18
4.3.5 Environmental Control Officer ............................................................................................... 18
4.3.6 Engineer’s Environmental Representative ............................................................................ 19
4.3.7 Contractor’s Environmental Representative ......................................................................... 19
4.3.8 Liability .................................................................................................................................. 19
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5 Legal Review ............................................................................................................... 20
5.1 Compliance with Legislation and Regulations ..................................................................................20
5.2 Required Environmental Permits, Licences and Authorisations ....................................................... 20
5.2.1 Waste disposal ...................................................................................................................... 20
5.2.2 Storage of hazardous substances......................................................................................... 21
5.2.3 Alien Invasive Species .......................................................................................................... 21
5.2.4 Health and Safety .................................................................................................................. 21
5.2.5 Heritage Resources............................................................................................................... 21
5.2.6 Water Use licence (WUL) ......................................................................................................21
6 Guidelines for the Environmental Management Programme ................................. 22
6.1 General Guidelines ........................................................................................................................... 22
6.2 Environmental Principles .................................................................................................................. 22
6.3 Incidents and Non-Conformances .................................................................................................... 22
6.4 Penalties and Liabilities .................................................................................................................... 23
7 Quantitative Impact Assessment .............................................................................. 25
7.1 Methodology...................................................................................................................................... 25
7.2 Results .............................................................................................................................................. 26
7.2.1 Potential Impacts Associated with the Decommissioning and Closure Phase ..................... 36
8 Environmental Management Programme ................................................................. 37
9 Monitoring and compliance ....................................................................................... 53
9.1 Site Documentation ........................................................................................................................... 53
9.2 Monitoring Programme ..................................................................................................................... 54
9.2.1 Water Quality......................................................................................................................... 54
9.2.2 Variables of concern.............................................................................................................. 54
9.2.3 Assessment of the Water Quality Results ............................................................................. 55
9.3 Photographic Record ........................................................................................................................ 56
9.4 Environmental Monitoring ................................................................................................................. 56
10 Awareness Training ................................................................................................... 59
Appendices ...................................................................................................................... 62
Appendix A: CVs and Qualifications of Project Team members ............................... 63
MAND/hinm 2018.09.20_498275_R_Boksburg Lake Rehab D.EMPr_Final September 2018
SRK Consulting: 498275: Rehabilitation of the Boksburg Lake: Draft EMPr Page iv List of Tables Table 1-1: Requirements of Appendix 4 of GNR 982.................................................................................... 4 Table 6-1: Classification of Environmental Incident .................................................................................... 23 Table 7-1: Criteria for Assessing Significance of Impacts ........................................................................... 26 Table 7-2: Interpretation of Impact Rating ................................................................................................... 26 Table 7-3: Summary of the potential impacts that can be expected during the construction phase .......... 31 Table 7-4: Summary of the potential impacts that can be expected during the operation phase ............... 35 Table 8-1: Environmental Programme for the Planning Phase................................................................... 38 Table 8-2: Environmental Programme for the Construction Phase ............................................................ 40 Table 8-3: Environmental Programme for the Operational and Rehabilitation Phase ................................ 50 Table 9-1: Water quality sampling points around the Boksburg lake catchment ........................................ 54 Table 9-2: Water Quality Sampling variables analysed for in catchment and in the lake ........................... 54 Table 9-3: KRWQOs for the surface water in the Klip River Catchment from the DWAF 2003 ................. 55 Table 9-4: Environmental monitoring programme ....................................................................................... 57 List of Figures Figure 1-1: Location of the Boksburg Lake .................................................................................................... 3 Figure 3-1: Proposed Aeration Process ......................................................................................................... 9 Figure 3-2: Low Crest Weir........................................................................................................................... 11 Figure 3-3: Project Layout ............................................................................................................................ 12 Figure 4-1: Reporting Relationships for the Boksburg Lake Remediation Project ....................................... 16 Figure 4-2: Staffing arrangements for the Boksburg Lake Remediation Project.......................................... 17 MAND/hinm 2018.09.20_498275_R_Boksburg Lake Rehab D.EMPr_Final September 2018
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Disclaimer
The opinions expressed in this Report have been based on the information supplied to SRK Consulting
(South Africa) (Pty) Ltd (SRK) by Ekurhuleni Metropolitan Municipality (EMM). The opinions in this
Report are provided in response to a specific request from EMM to do so. SRK has exercised all due
care in reviewing the supplied information. Whilst SRK has compared key supplied data with expected
values, the accuracy of the results and conclusions from the review are entirely reliant on the accuracy
and completeness of the supplied data. SRK does not accept responsibility for any errors or omissions
in the supplied information and does not accept any consequential liability arising from commercial
decisions or actions resulting from them. Opinions presented in this report apply to the site conditions
and features as they existed at the time of SRK’s investigations, and those reasonably foreseeable.
These opinions do not necessarily apply to conditions and features that may arise after the date of this
Report, about which SRK had no prior knowledge nor had the opportunity to evaluate.
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List of Abbreviations
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1 Introduction and Scope of Report
1.1 Background
SRK Consulting (South Africa) (Pty) Ltd (SRK) was appointed by the Environmental Resource
Management Department of the Ekurhuleni Metropolitan Municipality (EMM) for the compilation of a
rehabilitation plan and to conduct the associated environmental authorisation application processes
for the Boksburg Lake Rehabilitation Project. Figure 1-1 provides the location of the Boksburg Lake
Rehabilitation Project.
Due to the increased sedimentation as well as the deterioration of the water quality in the Boksburg
Lake, it has become necessary to develop a rehabilitation plan for implementation to improve the
condition of the lake for use as a public amenity. This process forms part of the Lakes and Dams
Flagship programme implemented in the municipality to optimise the use of these amenities by the
public.
The siltation and pollution problems of Boksburg Lake are primarily caused by urban sprawls that have
affected the lake’s original recreational and aesthetic purposes, which are typical of urban
impoundments. The water quality study conducted found that the water quality of the lake is impacted
upon by the activities in the upstream catchment areas. As a consequence, and to meet the EMM
Lakes and Dams Flagship programme to optimise the public’s use of Boksburg Lake, EMM appointed
SRK to undertake studies that would identify the rehabilitation measures that may be implemented to
improve the status of the lake. The assessment of the lake was conducted in four phases as follows:
Site visit and literature review
Phase 1 -Status Quo Assessment: The status quo assessment included:
o An assessment of the current sediment size and quality;
o Sediment and water quality assessment;
o An assessment of the possible sources of contamination;
o Hydro-geochemistry conceptual modelling to describe the sequestering (sources and
sinks) of the contaminants in the sediments and their interaction with the water column.
o Soil erosion and sediment transport modelling in the catchment: Sources of silt in the Lake
were identified by inspection of the catchment and by using the hydrological model
SHETRAN to simulate the rainfall-runoff-erosion processes. The total sediment yield was
validated against a regional sediment yield methodology developed for the SA Water
Research Commission (2012).
o Sediment transport modelling: A two-dimensional hydrodynamic model Mike21C of the
Danish Hydraulic Institute was used to simulate the sediment transport and deposition
processes in the Lake. Cohesive and non-cohesive fractions were also simulated.
o An assessment and description of the aquatic ecology.
The output was a status quo report on the catchment sediment yield and sources of sediment,
and on the sediment transport processes in the Lake and physical sediment characteristics in
the Lake Sediment analysis and conceptual model as well as a description of the water quality
and sources of water pollution and aquatic ecology of the lake.
Phase 2 - Lake and Catchment Rehabilitation Plan: Remedial measures to limit the sediment yield
in the catchment were evaluated. The focus was on the most critical zones in the catchment as
identified by SHETRAN during the status quo assessment phase. At the Lake, remedial measures
such as dredging of the sediment, sluicing, flushing with water level drawdown, bypassing of
sediment and poor water quality through an underwater culvert/conduit along the bank, or a check
dam upstream of the Lake were considered. Conceptual hydraulic designs were done for costing
of the alternatives. The Lake sediment management scenarios were also evaluated by
hydrodynamic modelling of the flow and sediment transport patterns.
An extensive literature research was conducted to gather information on various methods and
techniques for lake protection and restoration. The literature contained many discussions on lake
water problems and criteria for classifying lakes according to their condition. Lake restoration
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techniques (Krishan P. Singh, 1982) presented a logical frame work in which to approach Lake
restoration which is the approach that has been taken in providing recommendations to EMM.
Several in lake ameliorative measures were considered and these were firstly to dredge the
sediments, lake drawdown and drainage and then an option which incorporates a process of
dilution, aeration hypolimnetic drainage. The output of this phase was a detailed remediation
plan/report related to sediment management, which included the cost of each option assessed.
Phase 3 – Stakeholder Engagement Process: The stakeholder engagement process formed an
important and integral part of the project. The stakeholder engagement process was primarily
aimed at affording I&APs and stakeholders the opportunity to gain an understanding of the
proposed project. In addition, the purpose of consultation with the landowners, key stakeholders,
and I&APs was to provide them with the necessary information about the proposed project so that
they can make informed decisions as to whether the project will affect them. Stakeholder
identification and database: Relevant stakeholders were identified and a database containing the
contact details of each stakeholder or stakeholder representative has been established. The
database will be updated throughout the project. Meetings to discuss the proposed project options
and the preferred option were undertaken.
The construction of the remediation measures will trigger activities listed in Listing Notices 1 and 3 and
will require an Environmental Authorisation from the Gauteng Department of Agriculture and Rural
Development (GDARD), Competent Authority. This EMPr has been compiled as part of the application
for an EA, as required in terms of GNR 982 of the National Environmental Management Act, 1998 (Act
107 of 1998) (NEMA).
MAND/hinm 2018.09.20_498275_R_Boksburg Lake Rehab D.EMPr_Final September 2018SRK Consulting: 498275: Rehabilitation of the Boksburg Lake: Draft EMPr Page 3 Figure 1-1: Location of the Boksburg Lake MAND/hinm 2018.09.20_498275_R_Boksburg Lake Rehab D.EMPr_Final September 2018
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1.2 Purpose of the Environmental Management Programme (EMPr)
The purpose of this Environmental Management Programme (EMPr) is to ensure that the
impacts of the proposed project are kept to the minimum. This EMPr is based on the principles
of the NEMA, which include:
To avoid, minimise, or correct pollution and degradation of the environment;
To avoid or minimise waste and to re-use or re-cycle waste where possible;
To apply a risk averse and cautious approach;
To anticipate and prevent negative impacts on the environment (physical, biological, social,
economic, and cultural). Where these impacts cannot be prevented, such impacts must be
minimized or remedied;
That negative impacts on the environment and on people’s environmental rights be
anticipated and prevented, and where they cannot be altogether prevented, are minimized
and remedied;
Environmental management must be integrated, acknowledging that all elements of the
environment are linked and interrelated, and it must consider the effects of decisions on all
aspects of the environment and all people in the environment by pursuing the selection of
the best practicable environmental option; and
The social, economic and environmental impacts of activities, including disadvantages and
benefits, must be considered, assessed and evaluated, and decisions must be appropriate
in the light of such consideration and assessment.
The NEMA stipulates that anyone who causes pollution or degradation of the environment is
responsible for preventing impacts occurring, continuing or recurring and for the costs of repair
of the environment. Other legislation that contain requirements which were taken into
consideration in drafting the EMP, include:
National Environmental Management Act No. 107 of 1998;
National Water Act, 1998 Act No. 36 of 1998; and
Occupational Health and Safety Act No. 85 of 1993.
This EMPr among other things:
Presents an action plan for the implementation of mitigation measures with the purpose of
regulating the Contractor’s conduct or method of working;
Provides specific environmental guidance for construction and operation activities;
Incorporates measures to manage and mitigate construction activities so that negative
environmental impacts are avoided or reduced;
Identifies and allocates responsibilities for specific actions associated with the
management of construction activities to mitigate negative environmental impacts; and
Provides an outline of the activities which require monitoring and the assessment thereof.
1.3 Report Index in Relation to the NEMA Regulations
Appendix 4 of GNR 982 published in terms of NEMA stipulates the minimal requirements and
issues that need to be addressed in the EMPr. This report strives to address all these
requirements as per regulations. Table 1-1 indicates the regulations that have been addressed
and the section of the EMPr where these requirements can be found.
Table 1-1: Requirements of Appendix 4 of GNR 982
Section of the Description of EIA Regulations Requirements for Section where
EIA EMPr addressed in the
Regulations, EMPr
2014
Appendix 4 (a) details of Section 2
i. the EAP who prepared the EMPr; and
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Section of the Description of EIA Regulations Requirements for Section where
EIA EMPr addressed in the
Regulations, EMPr
2014
ii. the expertise of that EAP to prepare an EMPr,
including a curriculum vitae;
Appendix 4 (b) a detailed description of the aspects of the activity that are Section 3
covered by the EMPr as identified by the project
description;
Appendix 4 (c) a map at an appropriate scale which superimposes the Figure 1-1
proposed activity, its associated structures, and
infrastructure on the environmental sensitivities of the
preferred site, indicating any areas that any areas that
should be avoided, including buffers
Appendix 4 (d) a description of the impact management objectives, Section 8
including management statements, identifying the impacts
and risks that need to be avoided, managed and mitigated
as identified through the environmental impact assessment
process for all phases of the
development including-
i. planning and design;
ii. pre-construction activities;
iii. construction activities;
iv. rehabilitation of the environment after
construction and where applicable post closure;
and
v. where relevant, operation activities;
Appendix 4 (e) a description and identification of impact management Section 8
outcomes required for the aspects contemplated in
paragraph (d);
Appendix 4 (f) a description of proposed impact management actions, Section 8
identifying the way the impact management objectives and
outcomes contemplated in paragraphs (d) and (e) will be
achieved, and must, where applicable, include actions to:
i. avoid, modify, remedy, control or stop any action,
activity or process which causes pollution or
environmental degradation;
ii. comply with any prescribed environmental
management standards or practices;
iii. comply with any applicable provisions of the Act
regarding closure, where applicable; and
iv. Comply with any provisions of the Act regarding
financial provisions for rehabilitation, where
applicable.
Appendix 4 (g) The method of monitoring the implementation of the impact Section 8
management actions contemplated in paragraph (f). Section 9
Appendix 4 (h) The frequency of monitoring the implementation of the Section 8
impact management actions contemplated in paragraph (f).
Section 9
Appendix 4 (i) an indication of the persons who will be responsible for the Section 8
implementation of the impact management actions
Appendix 4 (j) the time periods within which the impact management Section 8
actions contemplated in paragraph (f) must be
implemented;
Appendix 4 (k) the mechanism for monitoring compliance with the impact Not Applicable
management actions contemplated in paragraph (f);
Appendix 4 (l) a program for reporting on compliance, considering the Not Applicable
requirements as prescribed by the Regulations;
Appendix 4 (m) an environmental awareness plan describing the manner in Section 10
which-
i. the applicant intends to inform his or her
employees of any environmental risk which may
result from their work; and
ii. risks must be dealt with to avoid pollution or the
degradation of the Environment.
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Section of the Description of EIA Regulations Requirements for Section where
EIA EMPr addressed in the
Regulations, EMPr
2014
Appendix 4 (n) Any specific information that may be required by the None
competent authority.
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2 Project Team
The SRK team responsible for compiling the EMPr consists on Ms Ndomupei Masawi (Senior
Environmental Scientist) and Ms Manda Hinsch (Partner/Principal Environmental Scientist).
2.1 Details and Expertise of the Environmental Assessment
Practitioner (EAP)
Ndomupei Masawi is a registered SACNASP (Reg Number: 400045/14) Professional
Environmental Scientist who has more than 13 years of Integrated Environmental Management
experience. Her experience includes compiling Environmental Management Programmes,
undertaking Public Participation Processes, providing Geographic Information System (GIS)
Services and undertaking the processes and assessments to support applications for
Environmental Authorisations, Water Use Licences, Waste Management Licences and Air
Emission Licences, for roads, railway lines, power stations, airports, dams, housing
developments, schools in South Africa, Zimbabwe and Uganda.
Manda Hinsch has been involved in the water sector field for the past 34 years. Her expertise
includes:
Conducting processes to obtain water and environmental authorisations, including the
associated public participation processes
thorough and in depth understanding of the South African water legislation; National Water
Act (1998) associated with links to the Water Act of 1956;
Water reform strategies and reallocation. development of policies for Implementing Water
Allocation Reform (WAR) in South Africa with associated pilot implementation;
implementation of WAR in selected catchments the implementation of validation;
evaluation of impacts and management through the issuing of Water Use Authorisations
and the management of hazardous and solid waste for industrial, mining water and waste
water systems;
implementation and policy development in water and related fields focus on water quality
management and management of water quality in urban and informal areas;
waste management strategies;
institutional development in the water sector- establishment of Catchment Management
Agency member of various steering Committees, e.g. Development of Classification
System, 2010 Water Quality Standards, Development of Catchment Management Strategy
guidelines etc;
extensive experience in the environmental and water legislation both in policy development
and implementation and environmental (hydrology and water quality) investigation for
nuclear sites;
surface water, water quality, specialist studies including monitoring protocols and plans;
annual water monitoring studies and small towns water reconciliation studies;
steering and guiding of research projects in the water field through the Water Research
Commission; and
Development and implementation of policy and strategy on pollution from urban areas.
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3 Project Details
3.1 Project Description
The identified solution to address the immediate need to restore the water quality of the
Boksburg Lake so that it can be used by the public, is to facilitate the natural processes. The
critical problem with the Boksburg Lake is the constant inflow of Suspended Solids (SS) and
nutrients from the sewerage leaking into the municipal storm water system that drains into the
lake.
Specific strategies to address a lake’s nutrient enrichment problems must focus on activities in
the watershed and in-lake restoration techniques. However, strategies to address the nutrients
emanating from the watershed is a medium to long term process before results will be seen
and do not address the immediate EMM Lakes and Dams Flagship programme requirements
so in lake interventions are required.
Lakes and bodies of water have a certain amount of pollution they can handle without human
intervention, however if the pollution inflows into the lake exceed the amount that the natural
processes of the lake can handle this then leads to cultural eutrophication and the anaerobic
conditions that now prevail in the lake.
Due to the dynamic interaction of lake chemistry, plants, microbes and how they will respond
to this intervention it is recommended a staggered approach be taken. Once the Dissolved
Oxygen (DO) levels are raised and the aerobic conditions are restored and maintained that the
natural process will be able to cope with the high SS levels negating any further interventions.
The transfer of oxygen from the atmosphere to the top layer of the lake ensures a surface layer
of varying depth which keeps nature in equilibrium. Urbanisation drastically increases pollutants
into the lakes thus exceeding the capacity the water body can handle on its own and turning
the oxidative layer into anaerobic conditions. Aerators have proven that they increase the ability
of lakes to survive pollution, increased nutrient levels and eutrophication. By providing sub
surface aeration with directional mixing, the water moves in a circular pattern around the entire
lake, breaks up stratification and increases in DO levels, the aerators assist nature in returning
a healthy state of aerobic equilibrium.
The first step in the restoration will be to install four 45 kW aerators into the lake and then to
monitor the results (Figure 3-1).
2 X 4 KW aerators will be installed at the Boksburg Lake inlet to oxygenate water as it
enters the dam and to eliminate the possibility of stagnation. This will also create a
beneficial flow path towards larger aerators and outlet.
2 X 45 KW aerators will also be installed at the outlet, the deepest part of the dam. The
aerators will reduce ammonia through nitrification, ejecting 162 kg of oxygen per hour,
reducing Chemical Oxygen Demand (COD) and increasing the (DO) levels in the lake.
With the aeration of the water and improved DO content, aerobic conditions will return which in
turn will enable the digestion of the SS. It is possible that only this intervention could restore
the lake, however if the SS levels and nutrient loadings are not resolved with aerators the next
step would be to filter out the SS.
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Rehabilitation of the Boksburg Lake Project No.
498275
Proposed Aeration
Figure 3-1: Proposed Aeration Process
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The removal of the SS will require the construction of a low crest weir (Figure 3-2) and the
establishment of a filtration plant as shown in Figure 3-3.
The purpose of the low crest weir is to contain the sewage laden inflows from the main storm
water pipes into a holding area separate from the main body of the lake without creating
impoundment that would cause water during a storm event to back up and exacerbate the
flooding that is experienced under the railway bridge on Trichardt’s Street.
The low crest weir will span the “narrows” between Latitude -26.220416°; Longitude 28.249346°
and Latitude -26.221608°: Longitude 28.249553°. The depth of the lake at this point is up to
2m deep. The weir is to be constructed from hand sized stone crushed rock of a sound stable
lithology. The side slope of the rockfill is to be at an angle of 1v:3h and the crest is to be 2m
wide. The rock is to be nominally compacted so that the crest is on the mean average water
level of the lake of elevation 1 608m.
From this holding area water laden with SS will be processed through a filter plant that will
remove the SS and filtered water will run into the main body of the lake. The SS that are filtered
out will then be removed to a waste disposal facility. The most suitable filtration plant identified
is the Dynadisc plant. This plant has a small footprint and minimal establishment requirements.
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REHABILITATION OF THE BOKSBURG LAKE Project No.
LOW CREST WEIR 498275
Figure 3-2: Low Crest Weir
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REHABILITATION OF THE BOKSBURG LAKE Project No.
PROPOSED REHABILITATION OPTION 498275
Figure 3-3: Project Layout
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3.2 Construction Methodology
3.2.1 Site Establishment
The construction sites will be located on previously disturbed areas near the amphitheatre that
is in a securely fenced area on the northern shore of the Lake. These areas will make provision
for closed civil systems such as water tanks and conservancy tanks for sewerage containment.
All waste products will be removed from the construction sites to an approved and licensed
disposal site. Rehabilitation of the construction sites will be to the same level as to prior
establishment. The construction site camps will be located above the 1:100-year flood line with
hazard free accessibility from the main roads for delivery and access to the construction areas.
Access to the respective construction site would be possible via pre-existing roads. All additives
to be used are to be non-poisonous and environmentally sound. Batching of concrete for all
purposes is to be done at the construction site camps in a regulated environmentally friendly
way. No batching will be allowed to happen inside river servitude area of the 1:100-year flood
line. All construction equipment and material also to be stored at the site camps and above the
1:100-year flood line where required. All material will be imported thus no quarries will be
established in the vicinity.
3.2.2 Low Crest Weir
The construction of the low crest weir will entail:
1. Site clearance and establishment.
2. All necessary traffic accommodation and construction warning signage will be erected as
necessary.
3. Surveying and setting out.
4. Importing and placement of rock fill material. This will be end tipped from the truck
starting on the northern shore and the rock will be positioned and profiled with a 20t
excavator.
5. The weir will then be advanced towards the southern shore in this manner.
6. Landscaping, shaping of ground and planting of vegetation where required.
7. Rehabilitation and site de-establishment including the removal of all debris and waste
products off the site to an approved and licensed disposal site.
8. Maintenance of the rehabilitated areas should be carried out to ensure that the newly
planted vegetation does not die.
3.2.3 Concrete Works for the proposed Wastewater Processing Package Plant
The construction of the Wastewater processing filter plant will include:
1. Excavation into river bank.
2. Erect formwork and steel fixing.
3. Concrete to be cast.
4. Curing.
5. Stripping of shutters.
6. Backfill and compact.
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7. Landscaping, shaping of ground and planting of vegetation where required.
8. Rehabilitation and site de-establishment including the removal of all debris and waste
products off the site to an approved and licensed disposal site.
9. Maintenance of the rehabilitated areas should be carried out to ensure that the newly
planted vegetation does not die.
3.3 Services
3.3.1 Water for Construction Purposes
The water required for maintenance purposes will be supplied by the EMM.
3.3.2 Power
All machinery used during the construction will be diesel/petrol driven.
3.3.3 Sanitation
Chemical ablution facilities will be made available to the maintenance staff at all times during
the maintenance period. These facilities will be serviced regularly, and the waste will be
transported to a treatment facility off-site. The facilities will be removed from the site once the
maintenance phase is completed.
3.3.4 Contractors Camp and Laydown Area
The contractor’s camp and laydown areas shall be located outside the 1:100-year floodlines of
the Boksburg Lake, any drainage areas and the wetland buffer zone.
3.3.5 Access Roads.
The existing access roads will be used throughout the construction phase. It is expected that
access to the respective construction sites will be open spaces, golf course and park areas.
3.3.6 Stockpiles of Raw Materials
The stockpiles will be placed in such a way that they will not impact on the Boksburg Lake and
drainage areas and will be located outside the 1:100-year floodlines.
3.4 Fuel Storage
To prevent earthmoving machinery moving in and out of the site and disrupting traffic in the
area diesel will be stored on site. Diesel will be required primarily for the earth moving
equipment. The demand for diesel is estimated at 10 000 litres per month. On-site storage of
about 5 000 litres in above ground storage tanks will be required to ensure the continuation of
the construction activities.
3.5 Construction Materials
Suitable excavated material will be stockpiled adjacent outside the 1:100-year floodlines of the
Braamfontein Spruit or outside of the wetland buffer zone, or whichever is great, and used as
backfill where required. Material not suitable for backfilling and all excess excavated material
that is not required for backfilling will be disposed of at a registered Landfill Site. Batching of
concrete for all purposes will be done at the construction site camps in a regulated
environmentally friendly way. No batching will be allowed within the 1:100 floodlines of the
Boksburg Lake.
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3.6 Employment
It is anticipated that the contractor (s) who will be appointed to do the work will be responsible
for recruiting people, including those from the surrounding area. Employment will only be
generated during the construction phase of the project.
3.7 Occupational Health and Safety
As a basic, all contractor employees and visitors will undergo induction training about health,
safety and the environment. This training will be required prior to entering the site for the first
time and will be required each time the conditions on-site change such that additional training
is required.
Personal Protective Equipment (PPE) will be issued to all persons entering the construction
site. PPE includes safety shoes, goggles, earplugs, gloves, hard hats, masks, etc. The PPE
required will be dependent on the area that the person is working in, as well as the activity
he/she is undertaking. The Contractor will conduct continuous rainfall projection monitoring to
ensure the safety of the construction workers.
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4 Organisational Structure
The purpose of this section is to define roles for personnel and allocate responsibilities in the
implementation and monitoring of the EMPr. Once the EMM receives an Environmental
Authorisation (EA) from GDARD, the EMM will be responsible for appointing an Engineer who
will be responsible for the final design and execution of the project. The Engineer will be
responsible to appoint the Contractor who will be responsible to ensure that the EMPr is
implemented.
4.1 Reporting Relationships
The reporting relationships are set out in Figure 4-1.
Project
REHABILITATION OF THE BOKSBURG LAKE
No.
REPORTING RELATIONSHIPS
498275
Figure 4-1: Reporting Relationships for the Boksburg Lake Remediation Project
4.2 Staffing Requirements
The staffing arrangements for the implementation of the EMPr are illustrated in Figure 4-2. The
EMM’s Environmental Management Services will visit the construction site on occasion to
ensure that the EA and EMPr are implemented.
The engineer will be responsible for the appointment of an Environmental Representative (ER)
to ensure that the Contractor implements the EMPr and the Contractor will appoint an
Environmental Representative to implement the EMPr.
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Project
REHABILITATION OF THE BOKSBURG LAKE
No.
STAFFING REQUIREMENTS
498275
Figure 4-2: Staffing arrangements for the Boksburg Lake Remediation Project
4.3 Roles, Responsibility and Compliance Monitoring
Requirements
4.3.1 Gauteng Department of Agriculture and Rural Development (GDARD)
The GDARD plays a lead role in the implementation of environmental policies, legislation and
regulations. Their role is to ensure that the construction of the maintenance works on the
Boksburg Lake is implemented in a sustainable manner, in compliance with the relevant
environmental legislation. GDARD is responsible for approving the EMPr for the project and
any revisions and amendments thereto.
4.3.2 Ekurhuleni Metropolitan Municipality (EMM)
The EMM Environmental Management Services is responsible for the Environmental
Management in the EMM’s area of responsibility. As part of their functions the Department
reviews and comments on all documentation prior to submission to any Authorities for
authorisations. They will conduct regular inspections during the construction phase.
4.3.3 Engineer and Engineer’s Representative
The Engineer will be appointed to finalise the designs and supervise the construction. The
Engineer will be represented on site for the duration of the construction phase by the Resident
Engineer (RE). The Engineer will carry the responsibility for the effective implementation of the
requirements set out in this EMPr. The Engineer will have an Environmental Representative
at his disposal on the site.
It will be the responsibility of the Engineer to ensure that the Contractor adheres to construction
specifications, the EA and EMPr. The Engineer has the authority to stop any construction
activity which is in contravention of any of the specifications within the documents mentioned
above after consultation with the Environmental Control Officer (ECO). All major decisions
which may affect the programme or costs of the project with regards to the environmental
procedure or protocols must be approved by the Employer via the Engineer.
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4.3.4 Contractors Representative
The Contractor will be appointed by the Engineer to undertake the construction of the remedial
measures that are required on the Boksburg Lake. The Contractor must make sure that he/she
clearly understands the environmental matters pertaining to the project. The responsibilities of
the contractor may include but will not be limited to the following:
To ensure that all employees and sub-contractors attend the environmental awareness
training and subsequent refresher training where necessary,
To ensure that all the employees and sub-contractors are aware of the contents of the EA
and the EMPr,
The implementation of and adherence to the EMPr,
Report any non-compliance to the Resident Engineer within specified time of occurrence,
Report any non-compliance event that constitute an emergency immediately and in line
with the relevant communication protocol, and
To ensure that all remedial work that is required, because of environmental negligence,
mismanagement and/or noncompliance, be conducted according to the EMPr.
4.3.5 Environmental Control Officer
The role of the ECO is to act as an independent monitor on behalf of GDARD for the
implementation of the EA and the EMPr. The Contractor’s Environmental Representative (CER)
will be responsible for the on-site implementation of the EMPr. The Contractor must ensure that
the ECO is suitably qualified to perform the necessary tasks and is appointed at a level such
that he/she can interact effectively with other site Contractors, site staff, and the public. The
ECO will ensure that all sub-contractors working under the Contractor abide by the
requirements of the EMPr.
The role and function of the ECO is to:
Inspect the site as required to ensure adherence to the management actions of the EMPr,
Compile an environmental inspection report to be presented at the Project Management
Meetings,
Verify that mitigation measures and conditions of the EMPr are being applied,
Conduct formal third-party monitoring and auditing against the EMPr,
Review monitoring data and evaluate it against performance data, and
After consultation with the Engineer and the Contractor, inform GDARD of non-compliance
with conditions and approvals.
As an independent Consultant the ECO is not responsible for:
EMPr implementation,
Collection of environmental monitoring data and analysis, and
Resolving Interested and Affected Party (IAP) complaints.
The ECO is not accountable for the implementation of the EA or the EMPr and is also not linked
to the project authorities or the Engineer or the Contractor. Therefore, the ECO does not have
the authority to:
Make project related decisions,
Issue instructions to the Engineer or the Contractor,
Stop the construction of the remedial works, and
Demand the implementation of specific mitigation and/or corrective measures to the
Engineer or the Contractor.
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4.3.6 Engineer’s Environmental Representative
The Engineer’s Environmental Representative (EER) is employed by the Engineer and is
responsible for overseeing the daily implementation of the EMPr for the duration of the project.
The EER should have a clear understanding of the project as well as all the environmental
matters pertaining to the project and should have a good knowledge on the applicable
environmental legislation and processes.
Responsibilities of the EER include:
To advise and provide recommendations on all environmental and related issues based on
the requirements of the EMPr,
To record and forward complaints received from the public to the Resident Engineer and
Employer,
Resolve conflicts,
Keep detailed and accurate records of the EMPr related activities on site, and
Report to the ECO on the monitoring of environmental issues.
4.3.7 Contractor’s Environmental Representative
The Contractor’s Environmental Representative (CER) is part of the Contractor’s staff and is
responsible for all activities related to the day-to-day on-site implementation of this EMPr and
compliance with the environmental specifications, and for the compilation of regular (monthly)
Monitoring Reports. The CER must liaise with the Engineer on all environmental and related
issues when necessary and ensure that any complaints received from the public are properly
recorded and dealt with. The Contractor shall ensure that all his employees, visitors and sub-
contractors receive Environmental Awareness Training as specified.
The CER must:
Be well versed in environmental matters,
Understand the relevant environmental legislation and processes,
Understand the hierarchy of environmental compliance reporting, and the implications of
non-compliance,
Be able to resolve conflicts and make recommendations (to the Contractor) in terms of the
requirements of this EMPr,
Keep accurate and detailed records of all EMPr-related activities on site,
Keep the following on file:
o Material Safety Data Sheets (MSDSs) for all hazardous material stores,
o Waste disposal certificates, and
o Copies of all permits and agreements required during the construction phase.
Arrange the presentation of environmental awareness training courses to all site staff,
Contractors and Sub-contractors, and monitor the environmental awareness training for all
new site personnel employed by the Contractor, and
Advise on the rectification of any pollution, contamination or damage to the project site,
rights of way and adjacent land.
4.3.8 Liability
Parties responsible for transgression of this EMPr will be held responsible for any rehabilitation
that may need to be undertaken. Parties responsible for environmental degradation through
irresponsible behaviour/negligence should receive penalties.
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5 Legal Review
5.1 Compliance with Legislation and Regulations
The contractor is required to comply with all relevant national and provincial legislation and
regulations including:
Atmospheric Pollution Prevention Act No. 45 of 1965 for the Control of noxious and
offensive gases, smoke, dust and vehicular emissions;
National Environmental Management: Air Quality Act 39 of 2004, List of Activities which
result in Atmospheric Emissions which may have a Significant Detrimental Effect on the
Environment – GN R893/2013
o Listed activities and associated minimum emission standards identified in terms of
Section 21 of the National Environmental Management: Air Quality Act 39 of 2004;
National Dust Control Regulations, 2013 GN R827/2013;
Gauteng Noise Control Regulations GN R5479/99, Regulations 8, 9, 10, 12 and 16;
National Environmental Management Act No. 107 of 1998;
o Section 30 Environmental Emergency Reporting Requirements; and
o Environmental Impact Assessment Regulations, 2014 GN R982/2014;
National Environmental Management: Waste Act, 59 of 2008;
NEM: WA Section 19 – Listed Waste Management Activities that may require licensing
o Waste Classification and Management Regulations, 2013 – GN R634/2013;
o List of Waste Management Activities that have, or are likely to have a Detrimental Effect
on the Environment GN R921/2013;
o National Norms and Standards for Disposal of Waste to Landfill – GN R636/2013; and
o Gauteng Waste Information Regulations, 2004.
National Water Act 1998 (No. 36 of 1998)
o Section 20 Environmental Emergency Reporting Requirements; and
o Section 145 Flood risk information.
Water Services Act No. 108 of 1997
o Regulations relating to the Compulsory National Standards and Measures to Conserve
Water GN R509/2001; and
o Diversion or impoundment of rivers. Conservation and use of water. Treatment and
disposal of waste, wastewater and effluent. Pollution and pollution emergencies. Water
Users & Associations;
Occupational Health and Safety Act No. 85 of 1993: Controls the exposure of employees
and the public to dangerous and toxic substances or activities. Department of Labour;
National Environmental Management Biodiversity Act 10 of 2004;
o Alien and Invasive Species Lists, 2014; and
o Alien and Invasive Species Regulations, 2014;
Conservation of Agricultural Resources Act 42 of 1983;
o Conservation of Agricultural Resources Regulations GNR 1048/84;
National Forest Act 30 of 1998 – Section 15 (Effect of declaration of protected trees); and
5.2 Required Environmental Permits, Licences and Authorisations
5.2.1 Waste disposal
All hazardous waste generated during the construction phase on site will only be disposed of
to an appropriate licensed landfill site in terms of the National Environmental Management:
Waste Act, 2008 (Act 59 of 2008) (NEM: WA). Copies of the permits or licences of the landfill
sites to be used must be obtained and kept on site before the commencement of construction.
All general and hazardous waste generated on site shall be separated and disposed of at the
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