Issuu

City Rail Link In association with:

Demolition Works-Mt Eden Active Construction Zone Erosion and Sediment Control Management Plan

Document Ref: CRL-MTE-RME-000-RPT-0139 Revision: 1 15 January 2019

INTERNAL WORKING DOCUMENT COMMERCIAL IN CONFIDENCE

Document control record Document prepared by: Aurecon New Zealand Limited Level 4, 139 Carlton Gore Road Newmarket Auckland 1023 PO Box 9762 Newmarket Auckland 1149 New Zealand

T F E W

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Document control Report title

Demolition Works-Mt Eden Active Construction Zone Erosion and Sediment Control Management Plan

Document ID

CRL-MTE-RME-000RPT-0139

Project number

239933

Client

City Rail Link Limited

Client contact

Richard Jenkins r

Rev

Date

Revision details/status

Prepared by

Author

Verifier

Approver

6 December 2018

Draft for internal review

Marcia Ho

Tiaan Nel

Anna Lindgren

15 January 2019

Draft for Peer Review

Marcia Ho

Tiaan Nel

Anna Lindgren

Current revision

Approval Author signature

Approver signature

Name

Marcia Ho

Name

Anna Lindgren

Title

Civil Engineer

Title

Associate

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Contents 1

Introduction

1.1 1.2 1.3 1.4 1.5

1 1 2 3 3

City Rail Link Advance Works Project Purpose Scope Report Structure

Project Description

2.1 2.2 2.3 2.4 2.5

4 5 5 7 9

General Site Location Catchment Area 1 Area 2 Area 3

Erosion and Sediment Control

3.1 3.1 3.2 3.3 3.4 3.5 3.6

12 12 12 13 14 16 18

Design Philosophy Erosion and Sediment Control Principles Sediment Yield Erosion and Sediment Control Measures Design of erosion and sediment control devices Specific erosion and sediment control devices Monitoring

Conclusion

Appendices Appendix A Drawings Appendix B Glossary of Terminology & Abbreviations Appendix C ISCA Requirements

Figures Figure 1 CRL Mt Eden active construction zone and construction support area Figure 2 CRL Outline Plan Contents Figure 3 Project Area Figure 4 Project area upstream catchment Figure 5 Area 1 extent Figure 6 Area 1 overland flow paths and upstream catchments Figure 7 Area 2 extent Figure 8 Area 2 overland flow paths and upstream catchments Figure 9 Area 3 extent Figure 10 Area 3 overland flow paths and upstream catchments Aurecon | Mott MacDonald | Jasmax | ARUP

1 2 4 5 6 7 8 9 10 11

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Tables Table 1: Sediment Yield Table 2: Silt fence design criteria reproduced from GD05 (F1.3) Table 3: Super Silt Fence Design Criteria reproduced from GD05 (F1.4) Table 4: Stabilised construction entrance design specifications as per GD05 E2.6

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13 15 15 16

Introduction

1.1

City Rail Link

The City Rail Link (CRL) project comprises the construction, operation and maintenance of a 3.4km underground passenger railway, running between Britomart Station and the North Auckland Rail Line (NAL) near Mt Eden Station. CRL Enabling Works commenced in December 2015 and the procurement of the main works contract (C3 Alliance) is being progressed with contract award likely in the first quarter of 2019. To allow works to commence as soon as possible upon award of the C3 Alliance, City Rail Link Limited (CRLL) are obtaining the necessary authorisations for demolition of buildings in the Mount Eden construction support area (CSA) and active construction zone (ACZ).

1.2

Advance Works Project

It is proposed to demolish the buildings and structures in the Mount Eden ACZ and CSA (â€œthe Projectâ€?), as identified in Figure 1 below. The Project is being undertaken in accordance with the CRL Designation 2500-6, confirmed in November 2015 and the Aotea Station to North Auckland Line (A2N) suite of resource consents approved in November 2016. The conditions of these authorisations require the preparation of an Outline Plan (OP), Delivery Works Plans (DWP) and Management Plans (MP). This Erosion and Sediment Control Plan (ESCP) is prepared in accordance with the CRL Designation and resource consent conditions and identified in the hierarchy of documentation illustrated in Figure 2.

Figure 1 CRL Mt Eden demolition area

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Figure 2 CRL Outline Plan Contents

The properties included in the Project area were purchased by Auckland Transport for the purposes of the CRL Project and are currently under CRLLâ€™s management. Most of the properties to be demolished are tenanted as of October 2018 with the remainder unoccupied. CRLL plan to commence the process of vacating the properties towards the end of 2018 and early 2019 to ensure sites are vacant in reasonable time ahead of the planned disconnection of services. Demolition will be undertaken in a staged manner the order of which is to be confirmed by the C3 Alliance. All buildings and structures will be removed to ground level, with the retention of some existing foundations where necessary for site stability. A soft strip of salvageable materials will be carried out where possible. All demolition material will be removed from the Project area and disposed of at approved facilities. The Project area will be fenced, with lockable gates, to prevent unauthorised entry. Where appropriate, solid plywood fencing will be used, with appropriate signage prohibiting unauthorised entry and identifying hazards.

1.3

Purpose

This ESCP has been developed by Aurecon New Zealand Limited (Aurecon) to describe the proposed erosion and sediment control methods and practices to be implemented to minimise the effects of demolition activities of the project and the potential consequential effects on the receiving environment. It outlines the control measures which should be implemented within the project area by the contractor to manage erosion and sediment. This report shall be read in conjunction with the Construction Environmental Management Plan, Contaminated Soils Management Plan and ESCP drawings (Appendix A). The purpose of this ESCP is to provide a high-level management strategy for the erosion and sediment generated from the demolition of the Mt Eden buildings and structures. The ESCP is designed to fulfil compliance requirements of the Resource Management Act 1991 (RMA) and provisions of the AUP regarding the mitigation and management of soil erosion and sediment yield related effects of the Project. It outlines the control measures to be implemented within the Project area by the contractor to manage erosion and sediment. It is expected that updates to the ESCP will be required once a preferred contractor has been selected and a site-specific demolition methodology has been developed by the contractor. Requirements associated with making any amendments to this ESCP (if required) will be detailed in the Construction Environmental Management Plan (CEMP) which will be submitted as part of this project resource consent.

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1.4

Scope

This ESCP provides a summary of the proposed erosion and sediment control measures relevant to the demolition of buildings in the Mount Eden CSA and ACZ. This ESCP relates to all temporary works required for the following: 

Demolition of buildings and structures;



Removal of utilities;



Site runoff management.

The implementation and monitoring of controls discussed within this ESCP are in accordance with Auckland Council (AC) Guideline Document 2016/005 (GD05) “Erosion and Sediment Control Guide for Land Disturbing Activities in the Auckland Region.” This ESCP supports the RMA authorisation1 for certification by Auckland Council and has been prepared based on the “Demolition Methodology for Properties for Construction Support Area at Mt Eden”. This plan has been developed based on the currently available demolition methodology, it is expected this will be updated following the confirmation of the preferred contractor and the development of a site/building specific demolition plan. Updates and changes to the ESCP should be re-submitted for Auckland Council certification.

1.5

Report Structure

The structure of the ESCP is designed to provide a logical and practical framework for the management of erosion and sediment control measures as it relates to the Project. The ESCP has the following key sections:

▪

Section 2 provides the Project general description, a description of the Project areas and the required demolition related works;

▪

Section 3 provides a detailed description of the erosion and sediment control measures proposed for the Project area;

All drawings referenced throughout the report are attached in Appendix A of this report.

CRL Designation 2500 and R/LUC/2016/1890. Aurecon | Mott MacDonald | Jasmax | ARUP

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Project Description

2.1

General

The Project works involve the demolition of building and structures including the removal of utilities within the Project Area including capping of three waters services at the site boundaries. The project Area is located to the west of Mt Eden Road and is bordered by the rail corridor to the south, Nikau Street to its north and Ngahura Street to its west as shown in Figure 3 below.

Area 3

Area 2 Area 1

Figure 3 Project Area

The Project Area is approximately 31,700m2 and comprises three smaller sub-areas, as shown in Figure 3. The order of demolition is yet to be confirmed, refer to the specific demolition methodology. The sub-areas comprise of the following addresses: Area 1: 95 & 97 Mt Eden Road and 8-36 Shaddock Street (even numbers only) Area 2: 6-10 Ngahura Street and 11-21 Ruru Street (odd numbers only) Area 3: 16-38 Nikau Street (even numbers only), 15-33 Shaddock Street (odd number only) and 5-6 Flower Street The demolition work is programmed to commence in June 2019 and expected to take approximately 5 to 6 months to complete. Work within the individual sub areas is expected to take between 6 to 8 weeks with some overlap between work in the different areas.

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2.2

Site Location Catchment

The topography of the catchment surrounding the project area is hilly with an approximate area of 77 ha. Figure 4 shows overland flow paths and floodplains in a 1 in 100 year rainfall event within the catchments with the project area highlighted in yellow in the north east corner of the catchment. Two main overland flow paths are shown to converge in Area 2 of the Project Area (refer to section 2.4 for details of Area 2). Figure 4 shows the catchments of each overland flow path.

Overland flow catchment 1 (Approx. 9.3 ha)

Rail corridor overland flow catchment (Approx. 67.4 ha)

Demolition Areas

Figure 4 Project area upstream catchment

2.3

Area 1

2.3.1

Site description

This area is bordered by Shaddock St to the north, Mt Eden Rd to the east and the railway corridor to the south as shown on Figure 5. It is approximately 14,000 m2 and is occupied by several existing buildings and hardstand areas. The site will be delineated by solid timber hoardings along the southern edge of Shaddock Street. This will prevent unauthorised entrance and make the ongoing works less visible. Refer to the specific demolition methodology to be developed for individual structures within this area designed to reduce risk to the rail corridor and overhead electrification system.

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Proposed Mt Eden Demolitions: Area I

N 8

6 26

6 30

6 97F 97/7

97G

34 36

97C 97B 97A 97K

Figure 5 Area 1 extent

2.3.2

Site levels and catchment

The general topography of the site is sloping northwest towards Shaddock Street. Area 1 falls from the northeast edge (RL 71m) at 8 Shaddock Street and southeast edge (RL 74 m) at 95 Mt Eden Road to an RL of 68 m at 28 Shaddock Street. The catchment of Area 1 is approximately 1.5 ha and drains towards existing soak pits within the internal road. Refer to DRG 1953. Based on stormwater infrastructure and kerb and channel within Shaddock Street it is assumed that it is mono cross fall and drains towards the northern side of Shaddock Street. The upstream catchment (approximately 0.5ha) drains towards Area 1 however is captured by existing stormwater infrastructure in the road adjacent to the north east boundary of the site. When buildings within Area 1 have been removed, the upstream catchment may drain through Area 1.

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Upstream Catchment (Approx. 0.5 ha)

Flood Plain Overland Flowpath Site Catchment (Approx. 1.4 ha)

Figure 6 Area 1 overland flow paths and upstream catchments

2.3.3

Site overland flow paths and flood plains

Auckland Council GIS shows that overland flow paths (OFP) and floodplains from the upstream catchments are located in the Project area, and the site will be affected by surface water runoff in the event of a 1 in 100-year rainfall event. The extent of the floodplains can be seen in Figure 6. Figure 6 shows that an existing OFP travels through Area 1 from the north-east corner of area and leaves at the low point in the centre of the northern boundary of the area. As there are existing buildings located in the OFP it is not considered to represent the existing situation accurately, however it is indicative of the OFP once the buildings are demolished. An existing floodplain is located at the southern boundary of the site within the rail corridor.

2.4

Area 2

2.4.1

Site description

This area is bordered by the rail corridor and Mt Eden Railway Station to the south, and Ngahura Street, Ruru Street and Shaddock Street to its east and west and existing properties to the north as shown in Figure 7. It is approximately 9,200 m2 and is occupied by several existing buildings and hardstand impervious areas. It is understood that only the building foundation slab and surrounding hardstand area of 21 Ruru St will remain following the departure of the current site occupants. The contractor may see benefit in leaving these slabs intact and utilising these as part of their construction support area. The property at 6-10 Ngahura St is known to contain some asbestos materials in the roofing and external cladding on some of the buildings. Refer to the asbestos management plan for building specific information regarding the demolition of this property.

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Proposed Mt Eden Demolitions: Area 2

11-13 15

6-10

Figure 7 Area 2 extent

2.4.2

Site levels and catchment

The general topography of this area is sloping ground in the north and relatively flat/slight slope in the south. The northern portion of the site slopes from a northwest (RL 72 m) to southeast direction to a low point (RL 68 m) overlapping a portion of 15 and 19 Ruru Street and 6-10 Ngahura Street. The southern portion of the site at 21 Ruru Street is reasonably flat at an approximate RL of 69 m. The catchment of Area 2 is approximately 0.96 ha with the catchments immediately to the north of the site being approximately 0.46 ha and 0.35ha (Figure 8). Surface runoff from the site is assumed to drain to a catchpit in the road on the north east boundary of the site. The catchpit connects to the reticulated stormwater system downstream of the site. Surface runoff from the upstream catchment of approximately 0.46ha and 0.35ha (Figure 8) discharges to nearby catchpits which connect to the reticulated stormwater system that runs through Area 2. Flows from this catchment are not expected to enter the site unless the primary stormwater system reaches capacity in which case flows from this catchment will flow through Area 2.

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Upstream Catchment (approx. 0.46 ha)

Upstream Catchment (approx. 0.35 ha)

Site Catchment (approx. 0.92 ha) Floodplain

Overland Flowpath

Figure 8 Area 2 overland flow paths and upstream catchments

2.4.3

Site overland flow paths and flood plains

Auckland Council GIS shows that the Project area interacts with OFP and floodplains from the upstream catchments and the site will be affected by surface water runoff in the event of a 1 in 100year rainfall event. The extent of the floodplains can be seen in Figure 8. Two main OFP travel through the area, one along the southern boundary of the site and the other entering on the south eastern side of the site from Nikau Street. These OFP converge at the south western corner of the site. Several smaller OFP also travel through the area such as those which converge within the flood plain.

2.5

Area 3

2.5.1

Site description

This area is bordered by Nikau Street to the north, Flower Street to the east and Shaddock Street along its southern and western edges as shown in Figure 9. Area 3 is the smallest of the three demolition zones at approximately 7,500 m2 and is occupied by several existing buildings and hardstand areas. The structure at 16-18 Ruru Street has already been demolished down to the foundation slab as part of the enabling works as can be seen on Figure 9. The building at 16 Nikau Street is positioned immediately next to the neighbouring property at 12-14 Nikau Street. Refer to the specific demolition methodology to be developed for further information regarding this. The properties at the north-east corner of this zone, from 18 Nikau Street to 24-26 Nikau Street and 5 Flower Street are in an area where the natural topography is very steep. It is understood that foundations and or basement structures of these buildings provide some earth retaining function in supporting the road corridor along the steeper reaches of Flower and Nikau Streets. Refer to the specific demolition methodology to be developed for individual structures and foundation removal. During the demolition of Area 3 access to the properties at the lower end of Flower Street and the culde-sac end of Shaddock Street will be maintained. If temporary closure of Flower and or Shaddock Street are required, closures will be undertaken separately so one will always remain open.

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Proposed Mt Eden Demolitions: Area 3

N 18 20-22 24-26 28-30 5 32-34

15-17

33-38 23

19 21 A/B/C

25 27-29 31 33

Figure 9 Area 3 extent

2.5.2

Site levels and catchment

The general topography of the site falls steeply in a southwest direction towards a localised low point near the south-western corner of the site. Area 3 falls from approximately RL 81 m at the intersection of Nikau and Flower Street to RL 66.5 m at the low point, across a distance of approximately 105 m (13.8% grade). The catchment of the main portion of Area 3 drains to a local low point/catchpit within the area at 3638 Nikau Street. An upstream catchment (0.14 ha) is contained within the road corridor and is not expected to cross the area in a normal rainfall event. The smaller section of Area 3 (16 Nikau St and 6 Flower St) to the east drains south towards the adjacent buildings. An upstream catchment (0.08 ha) is contained within the road corridor and is not expected to cross the area in a normal rainfall event.

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Upstream Catchment 1 (Approx. 0.14 ha)

Upstream Catchment 2 (Approx. 0.08 ha)

Overland Flowpath

Flood Plain

Site Catchment (Approx. 0.75 ha)

Figure 10 Area 3 overland flow paths and upstream catchments

2.5.3

Site overland flow paths and flood plains

Auckland Council GIS shows that the Project area interacts with OFP and floodplains from the upstream catchments and the site will be affected by surface water runoff in the event of a 1 in 100year rainfall event. The extent of the floodplains can be seen in Figure 10. One main OFP travels through along the southern boundary of the area. It should be noted than an existing floodplain is located at the north western boundary of the site within the Ruru/ Nikau Street road corridor.

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Erosion and Sediment Control

3.1

Design Philosophy

The construction environment of the Project related works is a highly developed urban area, predominantly formed of hard impervious paved areas and buildings. To construct the Project, the proposed works will require the demolition of the existing buildings in the three main areas as per Section 2. The proposed controls will ensure sediment generated on site will largely be contained within the site boundaries, resulting in minimal effect on the surrounding built environment.

3.1

Erosion and Sediment Control Principles

Erosion and sediment control measures will be established to minimise the extent of soil erosion and sediment yield from the Project area during construction. It will be implemented and monitored in accordance with AC “Erosion and sediment control guide for land disturbing activities” in the Auckland Region, known as GD05. The GD05 is an update of AC Technical Publication 90 (TP90) “Erosion and sediment control guidelines for land disturbing activities” in the Auckland Region and supersedes that guideline. All erosion and sediment control measures shall be fully established for each area within the Project before any physical works can commence in the area. Removal of devices and reinstatement of the surrounding ground upon completion of the works shall form part of the civil component of the project and shall be managed by the contractor.

3.1.1

Existing Stormwater Infrastructure

The project area including the upstream surrounding catchments is serviced by a reticulated stormwater network. Proposed controls to protect this system during the works include:

▪

Protecting the stormwater inlets - Using filter cloths/silt socks across inlets in accordance with GD05 guidelines;

▪

Sediment dispersion control - Stabilised entrance and exits with vehicle wash-down facilities is to be provided;

▪

Treating groundwater – Encountering groundwater onsite is not expected however, if required, groundwater will be pumped to a settlement tank prior to discharge to the existing stormwater network, minor dewatering will be discharged to stabilised surfaces and will be treated via downstream inlet catchpit protection measures; and

▪

Isolation of demolition areas – All demolition areas will be isolated from the surrounding environment to ensure clean water is diverted away from construction areas and that all construction related run off from the Project areas is collected and treated prior to discharge.

3.2

Sediment Yield

Table 1 shows the sediment yield for each area with and without erosion and sediment control measures. The calculation of the sediment yield is based on the Universal Sediment Loss Equation (USLE). Excavation works are not expected to be significant and therefore the soil type is determined from the initial soil layer of each area. The predominant soil type below the ground surface is fill determined from Structural Geological Long Sections (CRL-MTE-RME-000-DRG-2174-1.0 and CRL-EFC-RME000-DRG-2179-1.0). An assumption of clay, silt and sand composition was used to determine the soil erodibility factor F based on Section 5.5 of the Geotechnical Engineering Report CRL-SYW-GEO-000-

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RPT-0006 and geotechnical investigations carried out in the areas. Refer to Appendix C for calculations and assumptions. The demolition works is assumed to take 2 months per area and excavation works are assumed to include the removal of building foundations as a worst-case scenario. Refer to the demolition methodology for updated information on the demolition works. A 75% sediment control efficiency is assumed with sediment controls in place. Table 1: Sediment Yield

Area Area 1

Area (ha) 1.40

Time (months 2

Sediment Yield without ESC 0.45

Sediment Yield with ESC 0.11

Area 2 Area 3 (including removed building)

0.92

0.51

0.13

0.80

3.75

0.94

3.3

Erosion and Sediment Control Measures

3.3.1

General

The main sources of erosion for the site will be splash and sheet erosion in rainfall events. To minimise the generation and discharge of sediment the following key principals will be applied to each of the works sites in accordance with GD05:

▪ ▪ ▪

Employing sediment retention devices where practical; Rapidly stabilise exposed areas; and Minimise the areas of disturbance (both duration of works and physical area).

The works will be constructed in stages in conjunction with the overall construction sequencing to ensure that it accommodates the contractor’s requirements. By exposing only those areas that are required to be exposed for active demolition/earthworking at any one time, the duration of exposure and risk of erosion/sediment discharge can also be minimised. The control methods used will ensure:

▪ ▪

Stabilisation and cover of exposed areas as soon as practically possible;

▪

Capture and treatment of sediment laden water generated by the site works.

Installation of perimeter controls to protect the receiving environment from the demolition/earthworks; and

3.3.2

Proposed Erosion and Sediment Control Measures

Sediment loading is anticipated to be low as demolition/construction works will be undertaken using the following controls to minimise erosion potential and reduce sediment loads to the receiving stormwater network prior to discharge from the Project area (refer to drawings in Appendix A)

▪

Isolation of Project area – The work site shall include perimeter hoardings and temporary fencing to ensure separation of the work site from the public;

▪

Diverting road runoff – Ensure hot-mix bund is installed adjacent to the proposed works. As shown on drawings in Appendix A, the hot mix bund is positioned below site hoarding to prevent clean/dirty water infiltrating through the base of the hoardings and divert water to the nearest catchpit;

▪

Stormwater inlet protection – The existing network at the Project area is a fully reticulated pipe network common to a developed urban environment. All catchpits within and in the vicinity of the works site are to be protected using geofabric filter cloth across inlets in accordance with GD05 section F1.6. A silt sock is also to be placed completely around the inlet in accordance with GD05 section F1.5 as an added measure to act as a small sediment trap upstream of the catchpit. No discharge of surface or groundwater to wastewater systems is proposed;

▪

Managing surface water – Surface site runoff within the Project area shall generally be collected at silt fences ensuring treatment of sediment. Where flows are excessive, or ponding occurs pumping

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to a settlement tank or similar measure, shall be put in place to ensure flows are collected and treated prior to discharge from site. In areas where OFP’s are present, temporary diversion bunds will be constructed to divert any potential storm flows around the construction area. As soon as practical after the construction has passed these locations the diversion bunds will be removed, returning the OFP to its original path. Where this is not possible, overland flow paths through the site will be protected with geotextile fabric and super silt fences are proposed at the exit of the site to provide additional protection from sediment leaving the site;

▪

Dewatering – Ponding water or groundwaters are to be pumped to the settlement tank or similar for storage and treatment. Water treated through sediment settling is decanted from the settlement tank and discharged to the existing stormwater network or onto a stabilised flat area for sheet flow dispersion to a nearby catchpit;

▪

Treatment of surface water – Surface site runoff within the Project area shall fall to an existing catchpit or proposed catchpit with inlet protection;

▪

Water Quality – Batch dosing of any collected stormwater may be required subject to water quality testing conducted on the final discharge as indicated on the plans. A testing regime shall be established at the discharge point of all treatment facilities to ensure minimum water quality standards are met. Water quality testing requirements are outlined within the Water Quality Assessment appended to the Auckland City Rail Link Aotea Station to NAL project Resource Consent package. Note that if the testing determines that the flocculent treatment is required at the site, then a Flocculent Treatment Plan is required to be prepared and submitted to AC for certification prior to proceeding further with the construction works. See Appendix C for ISCA requirements.

▪

Open excavations – Excavated material shall be loaded straight onto trucks, where possible. Refer Section 3.5 for details if spoil/fill or demolition debris is to be stored on site temporarily. Extensive open excavations are not expected for the Project works. Should excavations and potholing be required they shall be covered in situations of high rainfall risk;

▪

Temporary and permanent site access - Access routes are expected to be impervious stabilised areas however if bare earth is exposed, stabilised entry/exit points shall be provided with basic vehicle wash-down facilities to prevent transport of sediment off site;

▪

Dust control – Dust production on site is expected to occur from demolition of existing buildings, material stockpiles if applicable and excavated ground areas. The Contractor required to manage dust as required through damping exposed areas utilising water carts and/or sprinklers. Construction of stabilised entrances and pathways are provided to limit dust generation. Regular monitoring of dust emissions and minimising areas of exposed soils to wind through construction staging is proposed;

▪

Loading trucks – Vehicles such as loading trucks are expected to travel solely along the stabilised access routes and are not expected to be accessing the exposed areas. However, if vehicles access the exposed areas, then a wash-down area and facility is to be provided to ensure vehicles are not carrying loose sediment; and

▪

Wet weather – During an unforeseen rainfall event that limits carrying out the work, the work shall be stopped, and the erosion and sediment control measures shall be checked to ensure they are operating correctly and upgraded or modified where necessary. Any open exposed areas should be suitably covered in anticipation of a rainfall event;

Specific control measures for each demolition are detailed in the following sections and drawings (Appendix A).

3.4

Design of erosion and sediment control devices

Drawings detailing control measures are included in Appendix A of this report. As a summary, the following control devices listed below are proposed across the sites. Details of each specific area are provided in consecutive sections.

▪ ▪ ▪

Asphalt bunds (section E2.1 of GD05); Super silt fences (section F1.4 of GD05); Silt fences (section F1.3 of GD05);

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▪ ▪ ▪ ▪ ▪

Silt socks/filter cloth (section F1.5 of GD05); Geotextile and Erosion control blankets (section E3.5 of GD05); Settlement tanks (section G1.0 of GD05); Catchpit inlet protection (section F1.6 of GD05); and Stabilised construction access (section E2.6 of GD05).

Silt fences Silt fences will be provided along the site perimeter in areas where runoff could leave the site in the absence of site hoardings (refer to Appendix A). Ground surface slopes where silt fences have been proposed are expected to be just greater than 2% grade in some areas. Length and spacings are to be in accordance with the design criteria as shown in Table 2 as specified GD05 F1.3. Table 2: Silt fence design criteria reproduced from GD05 (F1.3)

Ground surface slope steepness %

Slope length (m) (maximum)

Spacing of returns (m)

Flatter than 2%

Unlimited

N/A

2 – 10%

10 – 20%

20 – 33%

33 – 50%

> 50%

Super silt fences Super silt fences will be provided at sections along the site boundary where OFPs pass through the demolition area for added resilience (refer to Appendix A). Length and spacings are to be in accordance with the design criteria as shown in Table 3 as specified GD05 F1.3. Table 3: Super Silt Fence Design Criteria reproduced from GD05 (F1.4)

Ground surface slope steepness %

Slope length (m) (maximum)

Spacing of returns (m)

Super silt fence length (m) (maximum)

0 – 10%

Unlimited

10 – 20%

450

20 – 33%

300

33 – 50%

150

> 50%

Catchpit Inlet Protection Geofabrics are to be placed underneath catchpit grates that are immediately adjacent or within the works site in general accordance to GD05 section F1.6. In addition, a silt sock (refer to GD05 section F1.5) will be placed around inlets or catchpits. The silt sock will completely ‘ring fence’ the catchpit to enable treatment of runoff prior to entering the network. Settlement Tank It is expected that only very minor earthworks will be required for this Project, an area for placement of a settlement tank and pump has been allowed for on the plans in accordance with GD05 G1.0 should this be required. This should be used as required for dewatering of open excavations, potholing and groundwater. A minimum of 100 mm water clarity is required as per GD05 for pumping directly offsite.

Aurecon | Mott MacDonald | Jasmax | ARUP

File CRL- Mt Eden Demolition _ESCP_V3.docx, 2019-01-15 Revision 1

Geotextile mats Slope and soil stabilisation procedures will be used to prevent erosion on the steep slopes. Refer to specific areas in Section 3.5 for slopes with requiring geotextile slope protection. Exposed slopes are to be protected by temporary geotextile cover in accordance to GD05 E3.5. Stabilised construction vehicle entranceways and wheel wash Stabilised construction entrances (refer to Appendix A for plan and details) will be constructed as per GD05 E2.6 requirements. Aggregate used to construct the stabilised site entrance is to be in accordance with the specification in Table 4 as per GD05 E2.6. Stabilised entrances are to drain back onto the site or an asphalt speed hump is to be provided to prevent runoff leaving the site from the site entrance. In addition, a wheel wash facility is to be provided within the entranceway. Table 4: Stabilised construction entrance design specifications as per GD05 E2.6

3.5 3.5.1

Design parameter

Specification

Aggregate Size

50-150 mm washed aggregate

Minimum thickness

150mm

Minimum length

10 m

Minimum width

Specific erosion and sediment control devices Area 1

▪

Hoardings along the northern and north-eastern site boundary on Shaddock Street to be established on an asphalt bund to prevent dirty water leaving the site. Clean water will be conveyed by the asphalt bund around eastern boundary of the site towards existing stormwater infrastructure on Shaddock Street. Hoardings along the boundary adjacent to Mt Eden Road will divert clean water around the site along the rail corridor. Hoardings will also prevent overland flow paths from entering the site.

▪

The exposed ground surface of the Project area shall be gradually stabilised as demolition progresses. The contractor shall clear the entire site of all debris and demolition material. The basement structures of each demolished building shall be removed on a case by case basis determined by each structure’s local importance in supporting the nearby road carriageways. This process will require an engineering assessment. Refer to the specific demolition methodology to be developed by the Contractor.

▪

An indicative site access is required by GD05; this has been assumed to be via 95 Mt Eden Road. Where possible existing pavement is to be retained or suitable hardfill placed to provide a stabilised site entrance and exit in accordance with GD05 E2.6.

▪

A catchpit (CP 1) connected to manhole 90258 via a DN100 PVC pipe is proposed at the low point within Area 1 to collect dirty water diverted by the hoardings and asphalt bund on the eastern half of the area. Minor reprofiling at the hoardings edge in the eastern corner of the site is required to divert flows to the specified low point. An existing inlet (CP14593) will assist the capture of runoff from the western half of the site directed by the hoarding and asphalt bunding.

▪

Inlet protection with filter cloths and silt socks will also be installed for all existing soak pits located within Area 1.

▪

Ponding water within the site will be pumped to the indicative location of the settlement tanks if deemed to be required by the Contractor, this has been positioned to allow discharge of clean water to the existing stormwater water network in Shaddock Street via gravity;

▪

A silt fence will be installed along the western site boundary as required if Area 2 is demolished independently of Area 1.

▪

The steeper areas of the site around the proposed Mt Eden Road entrance will be protected by geotextile fabric to limit erosion. This will be installed as necessary on the steep sections as buildings are progressively demolished.

Aurecon | Mott MacDonald | Jasmax | ARUP

File CRL- Mt Eden Demolition _ESCP_V3.docx, 2019-01-15 Revision 1

3.5.2

Area 2

▪

Hoarding along the northern and eastern area boundary adjacent to Ruru Street to be established on an asphalt bund to divert clean water around the site. Hoardings along the southern boundary will divert clean water around the site within the rail corridor. Hoardings will also prevent overland flow paths from entering the site from the rail corridor. As this overland flow has a sizeable catchment it is crucial to prevent the flow from entering the site;

▪

Removable hoardings shall be installed at the intersection of Ruru and Nikau Street, this is required to allow overland flow through the site. In the case where this is required hoardings shall be lifted vertically or removed to all flow to pass through the site. Prevention of this would create serious flood risks within Shaddock Street in major storm events;

▪

The exposed ground surface of the Project area shall gradually be stabilised as demolition progresses. Overland flow paths crossing the site from Shaddock Street shall be stabilised or protected. Ground which has been exposed through removal of hardstand areas and/or building foundations must rapidly be stabilised with geotextile fabric to limit erosion. The contractor shall clear the entire site of all debris and demolition material. The basement structures of each demolished building will be removed on a case by case basis determined by each structure’s local importance in supporting the nearby road carriageways. This process will require an engineering assessment. Refer to the specific demolition methodology to be developed by the Contractor;

▪

An indicative site access is required by GD05; this has been assumed to be located on 21 Ruru Road. Refer to Contractor’s specific demolition methodology for location of site access. The existing pavement is to be retained or suitable hardfill placed to provide a stabilised site entrance and exit in accordance with GD05;

▪

A new inlet (CP4) is proposed at the low point within Area 2 and connected to the adjacent stormwater network in Ruru Road via a DN150 PVC pipe;

▪

A new inlet (CP5) is proposed at the western boundary of the site to treat and discharge the dirty water diversion.

▪

Dirty water diversions are graded away from the overland flow path to limit sediment washing away in the overland flow path.

▪

Ponding water within the site will be pumped to the indicative location of the settlement tanks, this has been positioned to allow discharge of clean water to the existing stormwater water network in Ngahura Street via gravity;

▪

A silt fence will be installed along the eastern site boundary as required if Area I is demolished independently of Area 2;

▪

The steeper areas in the north eastern section of the site will be protected by geotextile fabric to limit erosion. This will be installed as necessary on the steep sections as buildings are progressively demolished.

3.5.3

Area 3

▪

Hoarding on an as asphalt bund is proposed around the area perimeter to divert clean water flows and overland flows around the site.

▪

The exposed ground surface of the area shall gradually be stabilised as demolition progresses. Due to the steep site topography, basement structures of each demolished building will be removed on a case by case basis determined by each structure’s local importance in supporting the nearby road carriageways. This process will require an engineering assessment. Refer to the specific demolition methodology to be developed by the Contractor;

▪

An indicative site access is required by GD05; this has been assumed to be from Ruru Street. The existing pavement is to be retained or suitable hardfill placed to provide a stabilised site entrance and exit in accordance with GD05. This will be dependent on the condition of existing site entrance;

▪

An existing super pit (ECP2) is proposed to replace and existing catchpit adjacent to the area on Ruru Street. Refer to Contract 6 Nikau Street Shaft ESCP.

Aurecon | Mott MacDonald | Jasmax | ARUP

File CRL- Mt Eden Demolition _ESCP_V3.docx, 2019-01-15 Revision 1

▪

An existing inlet (CP2 on DRG 1955), as identified in the Contract 6 Nikau Street Shaft ESCP, is located in the localised low point within Area 3. A new pipe will be installed connecting the existing catchpit (CP2) to the reticulated network if required.

▪

Ponding water will be pumped as required into onsite settlement tanks and before discharge into the adjacent stormwater network in Nikau Street. Dirty water will be pumped to the indicative location of the settlement tanks, positioned to allow discharge of clean water to existing stormwater water network via gravity;

▪

The steeper areas of the site in the north east corner of the area will be protected by geotextile fabric to limit erosion. This will be installed as necessary on the steep sections as buildings are progressively demolished.

The following measures relate to the smaller section of Area 3, to the east of Flower Street;

▪

Hoarding along the area boundary to be established on an asphalt bund to divert clean flows around the site;

▪

A catchpit (CP3) will be installed at the low point of the site and connected to an existing manhole (38460). Asphalt bunding will divert dirty water concentrated at the bottom of the area to the proposed catchpit.

▪

Site access will be via Nikau Street. The existing pavement is to be retained or suitable hardfill will be placed in addition to a stabilised site entrance and exit in accordance with the GD05;

3.5.4

Site Spoil, Fill Material and Demolition Debris

Storage of excavated spoil, engineering fill, drainage materials or demolition debris will be limited at the worksite for the Project. Material from demolition is to be loaded directly into waiting trucks and disposed offsite as early as possible. However, if any debris is to be stockpiled temporarily it shall be stored on the up-slope side of the trench if possible or in a stabilised area such as the area available for the contractor which is away from the overland flow paths or exposed areas. Stockpiles shall be suitably compacted and covered by geotextile fabric to minimise sediment runoff and dust migration at the end of each day or when rain is forecast. Silt fences or other sediment control measures in accordance to GD05 shall be provided around the spoil storage area to prevent transport of sediment.

3.5.5

Reinstatement and Rehabilitation

On completion of the demolition works, the contractor will be required to:

▪ ▪ ▪

Ensure all excavations are backfilled and formed with approved material; Reinstate any utilities which were suspended or protected during construction; Remove erosion and sediment controls including silt socks and silt fences.

All reinstatement and rehabilitation works shall ensure that any sediment within these controls will be disposed of appropriately and care taken to ensure it does not discharge into the stormwater network or become susceptible to dispersion by overland flow paths.

3.6

Monitoring

As part of implementing the ESCP, the contractor will provide ongoing site monitoring to ensure that all proposed erosion and sediment control measures are installed correctly and continue to operate effectively and in the manner that was intended for the full duration of the works. All controls shall be inspected as a minimum weekly and following any heavy rain events to ensure devices continue to operate effectively. The following is an indicative outline of the inspection and maintenance regime proposed to ensure the erosion and sediment controls for the Project are maintained appropriately during construction:

▪

The Contractor shall inspect all control measures at the end of week/work period as a minimum and after every rainfall and periods of prolonged rainfall;

▪

All measures will be maintained in good working order;

Aurecon | Mott MacDonald | Jasmax | ARUP

File CRL- Mt Eden Demolition _ESCP_V3.docx, 2019-01-15 Revision 1

▪ ▪

Stabilised areas including entrances are to be maintained.

▪

The Project Engineer will be advised by the Contractor of any maintenance or remedial works undertaken, or any changes required to the ESCP to accommodate changes in conditions or work programme;

▪

Any change in the work programme requiring a significant change in the ESCP shall be approved by the Project Engineer and Auckland Council prior to installation;

▪

The Contractor shall maintain records on site of erosion inspections and will make available any reports at the request of the Project Engineer.

The Contractor shall monitor dust emissions on a daily basis, at a minimum. In windy dry conditions, dust emissions are to be monitored continuously. Water shall be reapplied as required to retain a moist ground in dry conditions.

A maintenance and inspections regime shall be established in consultation with the relevant Auckland Council representative and may require more regular inspections subject to the risk profile associated with each measure. ESC construction quality checklists for each measure are also available in Appendix C of the Auckland Council GD05 which may be used on site for guidance.

Aurecon | Mott MacDonald | Jasmax | ARUP

File CRL- Mt Eden Demolition _ESCP_V3.docx, 2019-01-15 Revision 1

Conclusion

The Mount Eden CSA and ACZ demolition work will require specific erosion and sediment control measures to be implemented by conditions of the consent in order to mitigate the environmental effects of the construction works. This ESCP provides a framework for identifying and implementing erosion and sediment controls during the demolition works. A design philosophy and number of design principles have been provided along with specific control methodologies for each area of the works. It is the contractorâ€™s responsibility to further develop or modify the ESCP measures based on the final demolition methodology. Requirements associated with making any amendments to this ESCP shall be defined in the CEMP which will be submitted as part of the Project outline plan. All controls shall be fully established before any physical works are undertaken and monitored in accordance with the Auckland Council GD05 Based on the proposed sediment and erosion controls detailed in this report, the effects of the Mount Eden CSA and ACZ demolition work can be managed in accordance with the CRL designation and resource consent conditions, statutory regulations and best management practices.

Aurecon | Mott MacDonald | Jasmax | ARUP

File CRL- Mt Eden Demolition _ESCP_V3.docx, 2019-01-15 Revision 1

Appendices

Appendix A Drawings

Document

Description

CRL-MTE-UTI-000-DRG-1951-A

City Rail Link Mt Eden- Demolition Works Erosion and Sediment Control Plan General Notes

CRL-MTE-UTI-000-DRG-1952-A

City Rail Link Mt Eden- Demolition Works Erosion and Sediment Control Plan General Overview

CRL-MTE-UTI-000-DRG-1953-A

City Rail Link Mt Eden- Demolition Works Erosion and Sediment Control Plan Area 1

CRL-MTE-UTI-000-DRG-1954-A

City Rail Link Mt Eden- Demolition Works Erosion and Sediment Control Plan Area 2

CRL-MTE-UTI-000-DRG-1955-A

City Rail Link Mt Eden- Demolition Works Erosion and Sediment Control Plan Area 3

CRL-MTE-UTI-000-DRG-1956-A

City Rail Link Mt Eden- Demolition Works Erosion and Sediment Control Plan General Details

GENERAL NOTES 1. ALL WORKS AND MATERIALS SHALL COMPLY WITH THE PROJECT DRAWINGS AND SPECIFICATIONS AND CURRENT AUCKLAND COUNCIL AND AUCKLAND TRANSPORT STANDARDS AND SPECIFICATIONS. ANY CONFLICT BETWEEN THE PROJECT DOCUMENTS AND COUNCIL STANDARDS SHALL BE RAISED WITH THE ENGINEER FOR RESOLUTION, PRIOR TO CONSTRUCTION. 2. THE EXACT EXTENT OF WORKS SHALL BE CONFIRMED ON SITE BY THE ENGINEER DURING CONSTRUCTION/DEMOLITION.

LEVEL AND SETOUT NOTES

EROSION AND SEDIMENT CONTROL NOTES

1. SURVEY INFORMATION DOES NOT INCLUDE A LEGAL BOUNDARY SURVEY OR IN SITU BOUNDARY MARKING UNLESS SPECIFICALLY NOTED. WHERE CADASTRAL BOUNDARIES ARE SHOWN, THEY HAVE BEEN SOURCED FROM LANDONLINE XML DATA AND ARE SUBJECT TO SURVEY. WORK AND MATERIALS SHALL COMPLY WITH THE PROJECT DRAWINGS AND SPECIFICATIONS AND CURRENT AUCKLAND COUNCIL STANDARDS AND SPECIFICATIONS. ANY CONFLICT BETWEEN THE PROJECT DOCUMENTS AND COUNCIL STANDARDS SHALL BE RAISED WITH THE ENGINEER FOR RESOLUTION, PRIOR TO CONSTRUCTION. SURVEY COORDINATES USED ARE IN TERMS OF MT EDEN GD 2000 COORDINATE.

1. ALL DIMENSIONS ARE IN METRES UNLESS OTHERWISE SHOWN.

3. UNLESS OTHERWISE NOTED, ALL LEVELS ARE METRES RELATIVE TO THE DATUM.

2. LEVEL INFORMATION IS IN TERMS OF AKL (MSL) 1946 DATUM.

4. DRAWINGS SHALL BE READ IN CONJUNCTION WITH THE SPECIFICATION. ALL DISCREPANCIES AND VARIATIONS SHALL BE REFERRED TO THE ENGINEER FOR DECISION BEFORE PROCEEDING WITH THE WORK.

3. THE TOPOGRAPHIC DATA SHOWN ON THESE PLANS HAS BEEN COMPILED FROM LASER SCAN SURVEYS UNDERTAKEN BETWEEN 2012 AND 2015 FOR THE PURPOSES OF PUBLIC REALM LANDSCAPING DESIGN ON THE CITY RAIL LINK PROJECT. ALL DETAIL IS SUBJECT TO VERIFICATION ON SITE PRIOR TO CONSTRUCTION.

5. DIMENSIONS SHALL NOT BE OBTAINED BY SCALING FROM THE DRAWINGS. 6. ALL WORK SHALL BE UNDERTAKEN SAFELY AND IN A MANNER MEETING ALL OBLIGATIONS UNDER THE HEALTH AND SAFETY AT WORK ACT 2015. 7. THE CONTRACTOR SHALL PROVIDE FOR SPECIALIST EQUIPMENT AS NECESSARY AND SAFE ENVIRONS FOR ANY INSPECTIONS REQUIRED TO BE MADE BY THE ENGINEER OR HIS/HER REPRESENTATIVES ON SITE.

4. SURVEY INFORMATION HAS BEEN SUPPLEMENTED BY INFORMATION FROM AUCKLAND COUNCIL GIS RECORDS. THE ACCURACY OF THIS INFORMATION CANNOT BE CONFIRMED AND THE LOCATION AND LEVEL OF ALL EXISTING UNDERGROUND SERVICES WITHIN THE EXTENT OF WORKS SHOULD BE CONFIRMED BY THE CONTRACTOR PRIOR TO CONSTRUCTION.

8. THE CONTRACTOR SHALL PROVIDE A SITE AND BUILDING SPECIFIC DEMOLITION PLAN.

4. BACKGROUND SURVEY INFORMATION (EXISTING CONTOURS) AND AERIAL PHOTO HAVE BEEN EXTRACTED FROM AUCKLAND COUNCIL GEOMAPS. 5. ANY STOCKPILE OF MATERIAL ONSITE SHOULD BE COVERED TO MINIMISE LOSSES AND NOT BE LOCATED IN OVERLAND FLOW PATHS OR SITE LOW POINTS. 6. ALL RUBBISH, VEGETATION, DEBRIS ETC SHOULD BE REMOVED FROM THE DEMOLITION/EARTHWORKS AREA AND DISPOSED OFF SITE BY THE CONTRACTOR PRIOR TO COMMENCEMENT OF SITE CLEARANCE. 7. THE CONTRACTOR IS TO PROVIDE A MOBILE SETTLEMENT TANK FOR DEWATERING OR SIMILAR DURING THE CONSTRUCTION PERIOD IN GENERAL ACCORDANCE TO GD05 SECTION G1.0. THE SIZE AND LOCATION OF THE TANKS ARE TO BE REVIEWED BY THE ENGINEER. 8. ALL EROSION AND SEDIMENT CONTROL MEASURES MUST BE OPERATIONAL PRIOR TO ANY OTHER WORK COMMENCING ON SITE. THE CONTRACTOR SHALL ARRANGE FOR AND ATTEND A PRELIMINARY SEDIMENT CONTROL MEETING ON SITE WITH THE ENGINEER AND A REPRESENTATIVE FROM AUCKLAND COUNCIL. 9. THE CONTRACTOR SHALL ENSURE COUNCIL BEST MANAGEMENT PRACTICES ARE IN PLACE DURING THE DEMOLITION/CONSTRUCTION PERIOD AND AT THE SITE ENTRANCE TO CONTROL ALL DUST, SILT, MUD AND SEDIMENT GENERATED BY THE WORKS AS TO NOT DISCHARGE FROM THE SITE AND/OR ENTER AUCKLAND COUNCIL STORMWATER SYSTEM.

9. RAIL ALIGNMENTS AND CIVIL INFRASTRUCTURE IS BASED ON INFORMATION PROVIDED BY RAILWAY INFRASTRUCTURE CONSULTANTS (RIC). 10. THE CONSTRUCTOR SHALL CONFIRM ALL DIMENSIONS ON SITE PRIOR TO COMMENCEMENT OF WORK. ANY DISCREPANCIES SHALL BE REFERRED TO THE ENGINEER FOR RESOLUTION BEFORE PROCEEDING WITH THE WORK.

10. FURTHER SEDIMENT CONTROL MAY BE REQUIRED BY THE ENGINEER AS THE PROJECT ADVANCES. THESE WILL BE INSTALLED AS AND WHERE DIRECTED BY THE ENGINEER. THE CONTRACTOR IS SOLELY RESPONSIBLE FOR ENSURING THAT THE SITE HAS EFFECTIVE SILT DETENTION FACILITIES OPERATING AT ALL TIMES.

EXISTING SERVICES

11. ALL SEDIMENT AND EROSION CONTROL FEATURES SHALL BE IN ACCORDANCE WITH AUCKLAND COUNCIL GD05.

1. THE LOCATIONS OF UNDERGROUND SERVICES SHOWN ON THESE DRAWINGS ARE APPROXIMATE ONLY AND BASED ON INFORMATION PROVIDED BY NETWORK UTILITY OPERATORS (NUO) AND KIWIRAIL. NO LIABILITY IS ACCEPTED FOR THE ACCURACY OR COMPLETENESS OF THE PLOTTED SERVICES. OTHER UNDERGROUND OR OVERHEAD SERVICES MAY EXIST THAT ARE NOT SHOWN ON THE DRAWINGS.

12. ALL EXISTING CATCHPITS LOCATED WITHIN THE SITE AND IMMEDIATELY ADJACENT TO THE SITE SHALL BE PROTECTED. 13. EXISTING STORMWATER NETWORK SOURCED FROM AUCKLAND COUNCIL GEOMAPS. 14. SILT FENCES ARE TO HAVE A MINIMUM 3m CLEARANCE FROM OPERATING RAIL TRACK CENTRELINES, IF THIS CANNOT BE ACHIEVED, THE ENGINEER SHALL DETERMINE ALLOWED CLEARANCE.

2. PRIOR TO COMMENCING ANY WORK INVOLVING EXCAVATION OR PENETRATIONS (PILING, DRILLING ETC) THE CONTRACTOR SHALL VERIFY THE LOCATIONS OF ALL SERVICES USING NUO DATA AND HAVE ALL SERVICES MARKED OUT ACCURATELY ON SITE USING NUO ON SITE LOCATION SERVICES PRIOR TO COMMENCING ANY GROUND DISTURBANCE.

15. EXISTING SERVICES HAVE BEEN PLOTTED FROM UTILITY COMPANIES RECORD MAPS AND ARE INDICATIVE ONLY. THE DRAWINGS ARE NOT TO BE TAKEN AS A COMPLETE AND ACCURATE RECORD OF THE SERVICES WITHIN THE AREA OF WORKS. ALL LOCATIONS ARE TO BE CONFIRMED ON SITE BY THE CONTRACTOR WITH THE RELEVANT SERVICE AUTHORITY REPRESENTATIVE PRIOR TO EXCAVATION.

3. PRIOR TO COMMENCING ANY DEMOLITION, EXCAVATION OR PENETRATION WORK IN ANY PART OF A LEGAL ROAD OR OTHER PUBLIC AREA THE CONTRACTOR SHALL APPLY FOR AND UPLIFT CORRIDOR ACCESS PERMITS AND MEET ALL ASSOCIATED REQUIREMENTS OF THE NUO.

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2. SITE LAYOUT IS INDICATIVE ONLY, AND IS TO BE CONFIRMED AT DETAILED DESIGN STAGE. 3. CONTRACTOR TO REFER TO SITE AND BUILDING SPECIFIC DEMOLITION METHODOLOGY.

EROSION AND SEDIMENT CONTROL LEGEND

16. ALL THREE WATERS LATERALS SERVICING DEMOLISHED BUILDINGS TO BE CAPPED AT THE BOUNDARY.

4. PRIOR TO COMMENCING PIPE, CABLE OR DUCT LAYING ACTIVITIES, THE CONTRACTOR SHALL POTHOLE ALL POTENTIAL SERVICE CONFLICTS AND ANY UNLEVELLED MAINS AT CONNECTION POINTS AND NOTIFY THE ENGINEER, TO ALLOW HIM/HER TO ACCURATELY LOCATE AND LEVEL THE SERVICES EXPOSED AND IF NECESSARY UNDERTAKE DESIGN MODIFICATIONS TO THE ALIGNMENT OR LONGSECTION OF THE NEW WORK.

EXISTING EXISTING OVERLAND FLOW PATH WITH BUILDINGS REMOVED (AKL GIS) ASSUMED OVERLAND FLOW PATH WITH EXISTING BUILDINGS IN PLACE EXISTING STORMWATER EXISTING Ø1950 STORMWATER MAIN

17. ALL EXPOSED GROUND SURFACES ARE TO BE PROTECTED FROM EROSION OR STABILISED 18. THESE DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE EROSION AND SEDIMENT CONTROL REPORT FOR THE MT EDEN CONSTRUCTION SUPPORT AREA & ACTIVE CONSTRUCTION ZONE.

SW SW

5. THE CONTRACTOR SHALL APPLY FOR AND UPLIFT ALL UTILITY PERMITS/CONSENTS, AND SATISFY ANY NUO REQUIREMENTS PRIOR TO UNDERTAKING ANY EXCAVATION OR UTILITY INSTALLATION WORK.

EXISTING CATCH PIT EXISTING SOAK PIT EXISTING CONTOURS (0.1m INTERVAL)

6. ALL STATUTORY AUTHORITIES SHALL BE NOTIFIED PRIOR TO ANY DEMOLITION, EXCAVATION OR EARTHWORKS TAKING PLACE IN PUBLIC PLACES AND RELEVANT NETWORK UTILITY OPERATORS NOTIFIED WHEN WORKING IN PROXIMITY TO THEIR SERVICES.

PROPOSED DEMOLITION BOUNDARY SITE BARRIER WITH HOARDING ON ASPHALT BUND

7. WHEN WORKS WILL AFFECT ROAD ACCESS OR ACCESS TO PRIVATE PROPERTIES, THE PROPERTY OWNERS SHALL BE GIVEN AT LEAST 5 DAYS’ NOTICE OF THE NATURE AND DURATION OF ANY IMPACTS AND ALL EMERGENCY SERVICES SHALL BE NOTIFIED.

DIRTY WATER DIVERSION CLEAN WATER DIVERSION PROPOSED STORMWATER PIPE SUPER SILT FENCE

8. ANY EXCAVATION NEAR ANY EXISTING UTILITY CABLE OR PRESSURE SERVICE (EG GAS, WATER OR SEWER RISING MAIN) SHALL BE ADVISED TO THE RELEVANT NUO AT LEAST TWO DAYS PRIOR TO COMMENCING ANY WORK AND WHERE REQUIRED SHALL BE UNDERTAKEN WITH OVERSIGHT BY A NUO REPRESENTATIVE.

SILT FENCE SITE ACCESS

5/12/2018 4:23:13 PM

Auckland

PROPOSED CATCH PIT FILTER CLOTH & SILT SOCK INLET PROTECTION SLOPE TO BE STABILISED WITH SYNTHETIC GEOTEXTILE IN STAGES AFTER DEMOLITION OF EACH BUILDING PROPOSED DIRECTION OF DEMOLITION (INDICATIVE) DIRECTION OF DRAINAGE

ORIGINAL DRAWING IN COLOUR

CLIENT

REV DATE REVISION DETAILS A 30.11.18 PRELIMINARY ISSUE

APPROVED A.LINDGREN

SCALE

SIZE

NOT TO SCALE

DRAWN

PRELIMINARY NOT FOR CONSTRUCTION

CITY RAIL LINK

PROJECT

MT EDEN - CONSTRUCTION SUPPORT EROSION AND SEDIMENT CONTROL GENERAL NOTES

APPROVED

H.ARSHAD

DESIGNED

DATE

TITLE

M.HO CHECKED

DOCUMENT

T.NEL 0

20mm ORIGINAL SIZE

100

200

300

400

500

600

PROJECT

ZONE

DISCIPLINE

ELEMENT

TYPE

SHEET

REVISION

CRL

MTE

UTI

000

DRG

1951

700

800

79 78 76

SW SW

70 70

SW SW

SW SW SW 73

77 72

SW 67

RO A

A UR

REFER DRG 1953

REFER DRG 1954

AREA 1

AREA 2

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SW W S

STR

T EE

DO AD

79 77 73

SW 71

SW SW

W SSW

SWK

SW SW W SWSW S

SW 70

REFER DRG 1955 68

AREA 3

SW 1 SW7

SW SW

30SW 0Ø RC C CON 225Ø

SW SW SW

SW XSW

SW SW

ET SW RE ST SW RU RU SW

SW SW

WHA SS

SWST

SWSW

REMOVED BUILDING

SW W S

SW 77

DIRECTION OF DRAINAGE

SW SW 73

SW 72

ASUW

NIK

E STR

PROPOSED CATCH PIT FILTER CLOTH & SILT SOCK INLET PROTECTION SLOPE TO BE STABILISED WITH SYNTHETIC GEOTEXTILE IN STAGES AFTER 74 75 DEMOLITION OF EACH BUILDING PROPOSED DIRECTION OF DEMOLITION (INDICATIVE)

T SW

SITE ACCESS

SILT FENCE

ET SW

AREA 3

SW 79

DIRTY WATER DIVERSION CLEAN WATER DIVERSION PROPOSED STORMWATER PIPE SUPER SILT FENCE

79 SW

SW 78

DEMOLITION BOUNDARY SITE BARRIER WITH HOARDING ON ASPHALT BUND

1. REFER TO DRG 1951 FOR ALL NOTES. 2. REFER TO UTILITIES MANAGEMENT PLAN FOR ALL SERVICES. SW 3. ALL THREE WATERS LATERALS SERVICING DEMOLISHED BUILDINGS TO BE CAPPED SW AT THE BOUNDARY. 4. ALL EXPOSED GROUND SURFACES ARE TO BE PROTECTED FROM EROSION W SOR STABILISED. 5. WHERE SEDIMENT REMOVAL BY FILTER CLOTH AND SILT SACKS IS DEEMED INSUFFICIENT 8BY 0 THE CONTRACTOR, SETTLEMENT TANKS ARE TO BE PROVIDED. THE SIZE AND LOCATION OF THE TANKS ARE TO BE REVIEWED BY THE ENGINEER. 6. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE EROSION AND SEDIMENT CONTROL REPORT FOR THE MT EDEN ACTIVE CONSTRUCTION ZONE & CONSTRUCTION SUPPORT AREAS. 7. ALL CATCHPITS 76 FOUND ON SITE ARE TO BE PROTECTED WITH FILTER CLOTHS AND SILT SOCKS. W

E RE

NOTE: 83

ET RE

K NI

ST RI RA KO

PROPOSED W

76 77

EXISTING CATCH PIT EXISTING SOAK PIT EXISTING CONTOURS (0.1m INTERVAL)

SW SW

EXISTING OVERLAND FLOW PATH WITH SW BUILDINGS REMOVED (AKL GIS) ASSUMED OVERLAND FLOW PATH WITH SW EXISTING BUILDINGS IN PLACE SW EXISTING STORMWATER EXISTING Ø1950 STORMWATER MAIN W S

T EE SW TR RS WE SW FLO

EXISTING

EROSION AND SEDIMENT CONTROL LEGEND

SW SW

ST RE

SW SW

69 69

IDOR

SW SW

Auckland

TO FEN

71 72

T REE N ST

RAIL CORR

7/12/2018 9:19:18 AM

72 71

REV DATE REVISION DETAILS A 30.11.18 PRELIMINARY ISSUE

APPROVED A.LINDGREN

SCALE

SIZE

1:500

DRAWN

PRELIMINARY NOT FOR CONSTRUCTION

CLIENT

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T.NEL 0

20mm ORIGINAL SIZE

100

200

300

400

500

MT EDEN - CONSTRUCTION SUPPORT EROSION AND SEDIMENT CONTROL GENERAL OVERVIEW PLAN

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M.HO CHECKED

CITY RAIL LINK

PROJECT

APPROVED

R.DAWSON

ORIGINAL DRAWING IN COLOUR

600

PROJECT

ZONE

DISCIPLINE

ELEMENT

TYPE

SHEET

REVISION

CRL

MTE

UTI

000

DRG

1952

700

800

SSWW

SW SW

AD DE

SW SW

HOARDINGS AND ASPHALT BUND. REFER TO DRG 1956

EROSION AND SEDIMENT CONTROL LEGEND EXISTING

PROPOSED SITE ACCESS. EXISTING PAVEMENT TO BE RETAINED OR SUITABLE HARD FILL PLACED TO PROVIDE STABILISED ENTRANCE

2 GE TA

71 S

SW SW SW

DEMOLITION BOUNDARY SITE BARRIER WITH HOARDING ON ASPHALT BUND DIRTY WATER DIVERSION CLEAN WATER DIVERSION PROPOSED STORMWATER PIPE SUPER SILT FENCE

REV DATE REVISION DETAILS A 30.11.18 PRELIMINARY ISSUE

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16m

DESIGNED CHECKED

100

200

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CITY RAIL LINK MT EDEN - CONSTRUCTION SUPPORT EROSION AND SEDIMENT CONTROL PLAN AREA 1

TITLE

DOCUMENT

T.NEL 80

DATE

PROJECT

M.HO

SCALE 1:400

PRELIMINARY NOT FOR CONSTRUCTION APPROVED

R.DAWSON 4

SW SW

CLIENT

ORIGINAL DRAWING IN COLOUR

ORIGINAL SIZE

70 SW

70 DIRECTION OF DRAINAGE

7/12/2018 9:15:58 AM

20mm

XW PROPOSED CATCH PIT SW S XW SW S FILTER CLOTH & SILT SOCKXINLET W S PROTECTION W SWX SW SWX S SW TO BE STABILISED WITH SYNTHETIC XSLOPE GEOTEXTILE IN STAGES AFTER DEMOLITION OF EACH BUILDING PROPOSED DIRECTION OF DEMOLITION (INDICATIVE)

SITE ACCESS

70 Auckland

SILT FENCE

PROPOSED

72 SW 71

W EXISTING CATCH PIT EXISTING SOAK PIT EXISTING CONTOURS (0.1m INTERVAL)

RAIL COR RIDOR

INDICATIVE VEHICLE WASH DOWN FACILITY TO BE PROVIDED BY CONTRACTOR.

EXISTING OVERLAND FLOW PATH WITH BUILDINGS REMOVED (AKL GIS) ASSUMED OVERLAND FLOW PATH WITH EXISTING BUILDINGS IN PLACE EXISTING STORMWATER EXISTING Ø1950 STORMWATER SWMAIN

AG E

SILT FENCE TO BE INSTALLED IF AREAS 1 & 2 ARE DEMOLISHED IN SEPARATE STAGES.

77 72 70

AREA 2 REFER TO DRG 1954 FOR AREA 2

71 72

78 SW

EXISTING SOAKPITS TO BE PROTECTED WITH FILTER CLOTH AND SILT SOCKS (REFER NOTE 5)

MINOR REPROFILING OF HOARDING EDGE TO DIVERT FLOWS TO LOW POINT.

CP 1

CP 14593

pw:\\designshare.au.aurecon.info:PW_PROD_AU\Documents\Projects\23xxxx\239933 - City Rail Link CDE\01-WIP\Drawings\CRL-MTE-UTI-000-DRG-1953.dwg

SW SW

SW W S

SW SW

67 SW

SW SW

80 SW

FILTER CLOTH & SILT SOCK INLET 70 PROTECTION TO BE PROVIDED AT EXISTING CATCHPIT (REFER NOTE 5)

GE STA

SW SW

INDICATIVE LOCATION OF SETTLEMENT TANKS IF REQUIRED

CP 15652

RURU ST REET

E RE

INDICATIVE WATER QUALITY TEST LOCATION (REFER NOTE 5)

SW SW

PROPOSED CATCHPIT TO BE 70 CONNECTED TO EXISTING STORMWATER INFRASTRUCTURE AND PROTECTED WITH FILTER CLOTH AND SILT SOCKS (REFER NOTE 5)

SW SW

SSW W

C CON 225Ø

0Ø

SW X 30

1. REFER TO DRG 1951 FOR ALL NOTES. 2. REFER TO UTILITIES MANAGEMENT PLAN FOR ALL SERVICES. 3. ALL THREE WATERS LATERALS SERVICING DEMOLISHED BUILDINGS TO BE CAPPED AT THE BOUNDARY. 4. ALL EXPOSED GROUND SURFACES ARE TO BE PROTECTED FROM EROSION OR STABILISED. 5. WHERE SEDIMENT REMOVAL BY FILTER CLOTH AND SILT SACKS IS 82 DEEMED INSUFFICIENT BY THE CONTRACTOR, SETTLEMENT TANKS ARE TO BE PROVIDED. THE SIZE AND LOCATION OF THE TANKS ARE TO BE REVIEWED BY THE ENGINEER. 6. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE EROSION AND SEDIMENT CONTROL REPORT FOR THE MT EDEN ACTIVE CONSTRUCTION ZONE & CONSTRUCTION SUPPORT AREAS. 7. ALL CATCHPITS FOUND ON SITE ARE TO BE PROTECTED WITH FILTER CLOTHS AND SILT SOCKS.

ET RE STSW SW

REFER TO DRG 1955 FOR AREA 3

EXISTING SERVICES TO BE REMOVED. REFER TO 73 UTILITIES MANAGEMENT PLAN

AREA 3

SW SW

75 74

NIK

R WE FLO W SW

E STR

NOTE:

OVERLAND FLOW PATH WILL BE DIVERTED AROUND THE SITE TO SHADDOCK STREET VIA HOARDINGS AND ASPHALT BUND

SW SW

600

PROJECT

ZONE

DISCIPLINE

ELEMENT

TYPE

SHEET

REVISION

CRL

MTE

UTI

000

DRG

1953

700

800

SW SW

X 0Ø SW RC

AREA 3

SW SW

ECP 2

SW X C CON 225Ø

SSW W

REFER TO DRG 1955 FOR AREA 3 ESCP SW

REMOVEABLE HOARDINGS IN THIS AREA TO ALLOW FOR OVERLAND PATHS

SW SW

SITE ACCESS

SW X

INDICATIVE WATER QUALITY TEST LOCATION (REFER NOTE 5)

SW SW

DIRECTION OF DRAINAGE

PROPOSED CATCH PIT FILTER CLOTH & SILT SOCK INLET PROTECTION SLOPE TO BE STABILISED WITH SYNTHETIC GEOTEXTILE IN STAGES AFTER DEMOLITION OF EACH BUILDING PROPOSED DIRECTION OF DEMOLITION (INDICATIVE)

SW SW

EE STR

AU NIK

SW SW

TO BE PROVIDED IF HARD STAND BOUNDARY REMOVED. REFER DEMOLITION TO DRG 1956. SITE BARRIER WITH HOARDING ON ASPHALT BUND AREA 1 DIRTY WATER DIVERSION REFER TO DRG 1953 FOR AREA 1 ESCP CLEAN WATER DIVERSION PROPOSED STORMWATER PIPE SILT FENCE TO BE INSTALLED IF SUPER SILT FENCE AREAS 1 & 2 ARE DEMOLISHED SILT FENCE IN SEPARATE STAGE.

ET RE ST RU RU

PROPOSED

SW SW

1. REFER TO DRG 1951 FOR ALL NOTES. 2. REFER TO UTILITIES MANAGEMENT PLAN FOR ALL SERVICES. 3. ALL THREE WATERS LATERALS SERVICING DEMOLISHED BUILDINGS TO BE 71 CAPPED AT THE BOUNDARY. 4. ALL EXPOSED GROUND SURFACES ARE TO BE PROTECTED FROM EROSION OR STABILISED. 5. WHERE SEDIMENT REMOVAL BY FILTER CLOTH AND SILT SACKS IS DEEMED INSUFFICIENT BY THE CONTRACTOR, SETTLEMENT TANKS ARE TO BE PROVIDED. THE SIZE AND LOCATION OF THE TANKS ARE TO BE REVIEWED BY THE ENGINEER. 6. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE EROSION AND SEDIMENT CONTROL REPORT FOR THE MT EDEN ACTIVE CONSTRUCTION ZONE & CONSTRUCTION SUPPORT AREAS. 7. ALL CATCHPITS FOUND ON SITE ARE TO BE PROTECTED WITH FILTER CLOTHS AND SILT SOCKS.

SW SW

EXISTING CATCH PIT INDICATIVE SITE ACCESS EXISTING SOAK PIT ON EXISTING PAVEMENT. EXISTING CONTOURS INTERVAL) STABILISED SITE(0.1m ENTRANCE

SW SW

HOARDINGS AND ASPHALT BUND. REFER TO RG 1956

NOTE: SW

SW SW

EXISTING OVERLAND FLOW PATH WITH BUILDINGS REMOVED (AKL GIS) HUMPFLOW / BUND TO WITH ASSUMEDSPEED OVERLAND PATH FROM EXISTING PREVENT BUILDINGSRUNOFF IN PLACE STABILISED ENTRANCE EXISTING STORMWATER FROM LEAVING SITE. EXISTING Ø1950 STORMWATER MAIN

EXISTING

EROSION AND SEDIMENT CONTROL LEGEND

SW SW

OP PR

INDICATIVE WATER QUALITY TEST LOCATION (REFER NOTE 5)

REMOVEABLE HOARDINGS IN THIS AREA TO ALLOW FOR OVERLAND PATHS

N1 DD

PIP

INLET TO BE PROTECTED WITH FILTER CLOTH AND SILT SOCKS (REFER NOTE 5)

C PV

CAUTION - ASBESTOS. REFER TO ASBESTOS MANAGEMENT PLAN

8 6PROPOSED CATCHPIT . E OS

SW SW SW SW

OVERLAND FLOW PATH WITH BUILDINGS REMOVED (BASED ON AUCKLAND GEOMAPS). OVERLAND FLOW TO BE PROTECTED VIA GROUND STABILISATION

CP 4

SHADDOCK

STREET

SW SW

pw:\\designshare.au.aurecon.info:PW_PROD_AU\Documents\Projects\23xxxx\239933 - City Rail Link CDE\01-WIP\Drawings\CRL-MTE-UTI-000-DRG-1954.dwg

D DN150 PROPOSE PIPE SW uPVC SW

CP 5 SW

MH16014

OVERLAND FLOW PATH WITH EXISTING BUILDINGS IN PLACE. OVERLAND FLOW PATH THROUGH SITE TO BE PROTECTED VIA GROUND STABILISATION.

SW SW

69 INDICATIVE LOCATION 71 OF SETTLEMENT TANK IF REQUIRED

INDICATIVE VEHICLE WASHDOWN FACILITY . LOCATION TO BE PROVIDED BY CONTRACTOR.

SW SW

NG AH A UR ST ET

7/12/2018 9:08:31 AM

Auckland

RAIL CORRIDOR

CLIENT

ORIGINAL DRAWING IN COLOUR

REV DATE REVISION DETAILS A 30.11.18 PRELIMINARY ISSUE

APPROVED A.LINDGREN

SCALE

SIZE

1:250

DRAWN 0

10m

DESIGNED CHECKED

ORIGINAL SIZE

100

MT EDEN - CONSTRUCTION SUPPORT EROSION AND SEDIMENT CONTROL PLAN AREA 2

TITLE

DOCUMENT

T.NEL 20mm

DATE

M.HO

SCALE 1:250

CITY RAIL LINK0

PROJECT

APPROVED

R.DAWSON 2.5

PRELIMINARY NOT FOR CONSTRUCTION

200

300

400

500

600

PROJECT

ZONE

DISCIPLINE

ELEMENT

TYPE

SHEET

REVISION

CRL

MTE

UTI

000

DRG

1954

700

800

INDICATIVE STABILISED SW SITE ACCESS.

EXISTING

78 76 SW

SW SW

RS WE

SW SW

FLO

W SWS

SW SW

SW SW SW

SW SW

PIP

R ST

SW SW

T EE

SW SW

K OC

0u SW

EXISTING LOW POINT / CATCH PIT TO BE PROTECTED WITH FILTER CLOTH AND SILT SOCKS. (REFER NOTE 5)

SW SW

INDICATIVE LOCATION OF VEHICLE WASHDOWN FACILITY TO BE PROVIDED BY CONTRACTOR.

SW SW

15 SW

W SSW

SW SW

NOTE:

SW SW

REV DATE REVISION DETAILS A 30.11.18 PRELIMINARY ISSUE

APPROVED A.LINDGREN

SCALE

SIZE

1:250

DRAWN 10

20m

DESIGNED CHECKED

DATE

MT EDEN - CONSTRUCTION SUPPORT EROSION AND SEDIMENT CONTROL PLAN AREA 3

TITLE

DOCUMENT

T.NEL 100

CITY RAIL LINK

PROJECT

M.HO

SCALE 1:500

PRELIMINARY NOT FOR CONSTRUCTION APPROVED

R.DAWSON 0

AREA 1

SW 5/12/2018 4:20:04 PM

1. REFER TO DRG 1951 FOR ALL NOTES. 2. REFER TO UTILITIES MANAGEMENT PLAN FOR ALL SERVICES. 3. ALL THREE WATERS LATERALS SERVICING DEMOLISHED BUILDINGS TO BE CAPPED AT THE BOUNDARY. 4. ALL EXPOSED GROUND SURFACES ARE TO BE PROTECTED FROM EROSION OR STABILISED. 5. WHERE SEDIMENT REMOVAL BY FILTER CLOTH AND SILT SACKS IS DEEMED INSUFFICIENT BY THE CONTRACTOR, SETTLEMENT TANKS ARE TO BE PROVIDED. THE SIZE AND LOCATION OF THE TANKS ARE TO BE REVIEWED BY THE ENGINEER. 6. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE EROSION AND SEDIMENT CONTROL REPORT FOR THE MT EDEN ACTIVE CONSTRUCTION ZONE & CONSTRUCTION SUPPORT AREAS. 7. ALL CATCHPITS FOUND ON SITE ARE TO BE PROTECTED WITH FILTER CLOTHS AND SILT SOCKS.

W EXISTING SSERVICE TO BEW REMOVED. REFER TO UTILITIESSW MANAGEMENT PLAN

CLIENT

ORIGINAL DRAWING IN COLOUR

SWW S

Auckland

SW SW

ORIGINAL SIZE

71 SW

CP 2

EXISTING CSA (REMOVED BUILDING)

ED SW

EXISTING SUPER PIT

AREA 2

72 71

20mm

ECP 2

EXISTING ACCESS POINTS LOCATED IN EXISTING STABILISED AREA. STABILISED CONSTRUCTION ENTRANCE TO BE PROVIDED IF REQUIRED

SW C X CON 225Ø

SW SW

30 0

X Ø R SW C

SWX

SW SW

NEW CATCH PIT PROTECTED WITH FILTER CLOTH AND SILT SOCKS (REFER NOTE 5)

SW SW

CP 3

E STR

(BASED ON AUCKLAND GEOMAPS)

SW SW

NIK

INDICATIVE LOCATION OF W SETTLEMENT TANKS IFS REQUIRED.

I ST

R RA

EXISTING SERVICE TO BE REMOVED. REFER TO UTILITIES MANAGEMENT PLAN

SW SW

DIRECTION OF DRAINAGE

PROPOSED CATCH PIT FILTER CLOTH & SILT SOCK INLET PROTECTION SLOPE TO BE STABILISED WITH SYNTHETIC GEOTEXTILE IN STAGES AFTER DEMOLITION OF EACH BUILDING PROPOSED DIRECTION OF DEMOLITION (INDICATIVE)

INDICATIVE WATER QUALITY TEST LOCATION (REFER NOTE 5)

SILT FENCE

pw:\\designshare.au.aurecon.info:PW_PROD_AU\Documents\Projects\23xxxx\239933 - City Rail Link CDE\01-WIP\Drawings\CRL-MTE-UTI-000-DRG-1955.dwg

SW SW SW

DIRTY WATER DIVERSION CLEAN WATER DIVERSION PROPOSED STORMWATER PIPE SUPER SILT FENCE

SITE ACCESS

SW MINOR REPROFILING OF SITE TO DRAIN SW DIRTY WATER TO LOW 72 POINT. E P PI W C SWS MH 38468 PV u 0 W 10 SWS DN D W E S 71 OS OP SW R P ABANDONED MANHOLE

DEMOLITION BOUNDARY SITE BARRIER WITH HOARDING ON ASPHALT BUND

PROPOSED

78 SERVICE TO BE EXISTING REMOVED. REFER TO UTILITIES MANAGEMENT PLAN

EXISTING CATCH PIT EXISTING SOAK PIT EXISTING CONTOURS (0.1m INTERVAL)

HOARDINGSSWAND ASPHALT BUND.SWREFER TO DRG 1956

80 SW

EXISTING OVERLAND FLOW PATH WITH BUILDINGS REMOVED (AKL GIS) ASSUMED OVERLAND FLOW PATH WITH EXISTING BUILDINGS IN PLACE EXISTING STORMWATER EXISTING Ø1950 STORMWATER MAIN

EROSION AND SEDIMENT CONTROL LEGEND

200

300

400

500

600

PROJECT

ZONE

DISCIPLINE

ELEMENT

TYPE

SHEET

REVISION

CRL

MTE

UTI

000

DRG

1955

700

800

SITE BOUNDARY SITE HOARDING AND ASPHALT BUND AGGREGATE

300mm

SILT SOCK RUNOFF WATER

COURSE GEOTEXTILE

EXISTING SURFACE N2 300

SEDIMENT BUILD UP

300

CESSPIT GRATE

CLEAN WATER DIVERSION

DIRTY WATER DIVERSION

CROSS SECTION SECTION 1:25

SILT SOCK

A -

CATCHPIT PROTECTION DETAIL (REFER TO GD05 SECTION F1.6) NOT TO SCALE STANDARD DETAILS FOR FABRIC JOIN

10m MIN.

3m MIN.

pw:\\designshare.au.aurecon.info:PW_PROD_AU\Documents\Projects\23xxxx\239933 - City Rail Link CDE\01-WIP\Drawings\CRL-MTE-UTI-000-DRG-1956.dwg

4m MIN.

CARRIAGEWAY

3m MIN.

AGGREGATE (50-150mm WASHED)

CARRIAGE WAY 150mm THICKNESS OR 1.5 x AGGREGATE SIZE

Auckland

GEOTEXTILE SILT FENCE WITH RETURNS AND SUPPORT WIRE

STABILISED CONSTRUCTION ENTRANCE (REFER TO GD05 PART E SECTION 2.6)

4/12/2018 11:30:21 AM

NOT TO SCALE

ORIGINAL DRAWING IN COLOUR 250

500

CLIENT

SILT FENCE DETAIL (REFER TO GD05 PART F SECTION 1.3)

SUPER SILT FENCE (REFER TO GD05 PART F SECTION 1.4)

NOT TO SCALE

REV DATE REVISION DETAILS A 30.11.18 PRELIMINARY ISSUE

APPROVED A.LINDGREN

1000mm

SCALE

SIZE

AS SHOWN

DRAWN

CITY RAIL LINK

PROJECT

MT EDEN - CONSTRUCTION SUPPORT EROSION AND SEDIMENT CONTROL GENERAL DETAILS

APPROVED

H.ARSHAD

SCALE 1:25

PRELIMINARY NOT FOR CONSTRUCTION .

DESIGNED

DATE

TITLE

M.HO CHECKED

DOCUMENT

T.NEL 0

20mm ORIGINAL SIZE

100

200

300

400

500

600

PROJECT

ZONE

DISCIPLINE

ELEMENT

TYPE

SHEET

REVISION

CRL

MTE

UTI

000

DRG

1956

700

800

Appendix B Glossary of Terminology & Abbreviations The following terminology has been used throughout this City Rail Link Erosion and Sediment Control Management Plan and are listed below for reference. Term

Description

Groundwater

Water located underground in pore spaces within the soil mass

Hoarding

Temporary fencing/barriers enclosing a construction site

the Project

Works related to Otahuhu Modifications

Spoil

Excavated material

The following abbreviations have been used throughout this City Rail Link Erosion and Sediment Control Management Plan and are listed below for reference. Abbreviation

Description

Auckland Council

AEE

Assessment of Environmental Effects

BOL

Block of Line

CRL

City Rail Link project

CRLL

City Rail Link Limited

CSMP

Contaminated Site Management Plan

ESCP

Erosion and Sediment Control Plan

GD05

Auckland Council Guideline Document for Erosion and Sediment Control (2016)

HAIL

Hazardous Activities and Industries List

NUO

Network Utility Operator

OFP

Overland Flow Path

PROJECT AREA

Works Area

PSI

Preliminary Site Investigation

RMA

Resource Management Act 1991

USLE

Universal Sediment Loss Equation

Appendix C ISCA REQUIREMENTS CRLL is seeking ISCA (infrastructure Sustainability Council of Australia) IS (infrastructure Sustainability) Rating for the whole project lifecycle where the requirements as per ISCA CRL IS Technical Manual – Mahi Rauora Aratohu - Version 1.2 are essential to achieve the Project’s sustainability goal (Reference to CRLL minimum requirements - Appendices 10, 23 and 24 of the contract documents). This Appendix includes IS requirements that are necessary to achieve a target level 3 of Dis-1 ISCA credits (CRLL Mandatory requirement as per Appendix 10 – Sustainability Minimum Requirements of the contract documents). The below Table to be reviewed, amended (as and if needed) and confirmed to meet the target level that is required. The relevant required evidence(s) to achieve the target to be provided at appropriate timing. ISCA Category Dis-1

Target Level 3

Construction Requirements

Wai Ora (Receiving Water Quality) Benchmark Measures to minimise adverse impacts to receiving wai environmental values during construction and operation have been identified and implemented. These measures demonstrate an awareness of the values of wai ora and its Mauri, and opportunity for mana whenua feedback has been provided and where practicable incorporated into these measures. AND Monitoring of wai discharges and receiving wai is undertaken at appropriate intervals and at times of discharge during construction AND Monitoring and modelling of wai discharges and receiving wai demonstrates no adverse impact on receiving wai environmental values.

How we Aim to achieve this

Section 3 of the Erosion and Sediment Control Management Plan. Modelling is not covered in this Management Plan. The need for modelling or otherwise for the related demolition works to be reviewed once the project goes forward and to be addressed accordingly prior to work progress.

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