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Connectus 2719 Contamination Delivery Work Plan Addendum: Public Realm Reinstatement
Project: City Rail Link C2
Client: City Rail Link Limited
Doc. No. CRL-PAT-RME-AT-RPT-033005
Revision: 4, Date: 30th October 2018
DOCUMENT INFORMATION
Organisation: Connectus
Document Title: Contamination Delivery Work Plan Addendum: Public Realm Reinstatement
Fulcrum Document Number: CRL-PAT-RME-AT-RPT-033005
Document based on iTWOcx No: n/a
Client: City Rail Link Limited
Project: CRL Enabling Works: Contract Two
Location: Auckland CBD
Project No: 2719
REVISION HISTORY
This document remains the property of Connectus. Its contents are confidential and shall not be reproduced, destroyed or given away without the express, written permission of Connects. The electronic version of this document in iTWOcx Database on designated server(s) is the Master Copy and is a controlled document. Unless specifically noted thereon, other copies of this document are uncontrolled.
Connectus 2719 Contamination Delivery Work Plan Addendum: Public Realm Reinstatement
Project: City Rail Link C2
Client: City Rail Link Limited
This page intentionally left blank
Doc. No. CRL-PAT-RME-AT-RPT-033005
Revision: 4, Date: 30th October 2018
Project: City Rail Link C2
Client: City Rail Link Limited
This page intentionally left blank
Doc. No. CRL-PAT-RME-AT-RPT-033005
Revision: 4, Date: 30th October 2018
Public Realm Reinstatement
Project: City Rail Link C2
Client: City Rail Link Limited Revision: 4, Date: 30th October 2018
1 INTRODUCTION
The purpose of this Addendum to the City Rail Link (CRL) Enabling Works Contract 2 (C2) Contamination Delivery Work Plan1 (CDWP) is to ensure that activities associated with the CRL C2 Public Realm Reinstatement (PRR) works meet the requirements of the conditions (designation and resource consent2) set out in Section 1.2 of the CRL C2 CDWP.
The specific purpose of this Addendum is to deal with potential contaminated discharges associated with the PPR phase of the construction works that were not covered in the existing CRL C2 CDWP. Where the adverse effects from a specific activity are already covered in the CRL C2 CDWP, reference is made to the appropriate section.
2 PROJECT DESCRIPTION
This section presents a summary of the PRR works to provide context to the CRL C2 CDWP Addendum. A detailed description of the PRR works is provided in the CRL C2 Construction Environment Management Plan (CEMP) – PRR Addendum (CRL-PAT-RME-AT-RPT-033021).
2.1 CONSTRUCTION METHODOLOGY OVERVIEW
Following the completion of the cut and cover trenched section of the CRL tunnel along Albert Street between Customs Street and Wyndham Street, Connectus will progress with the reinstatement of the public realm along and around the physical works area. Connectus anticipate that the completion of the cut and cover trenched section will be achieved progressively from south to north along Albert Street. Accordingly, as the tunnel is progressively completed Connectus will undertake the PRR works in a staged manner along the works area, readying Albert Street and surrounding works area for public access once again.
The PRR works include the re-instatement of the road carriageway and footpaths, urban design enhancements, and landscaping. The area for reinstatement expands beyond the works area for the cut and cover trenched section, reflecting a logical transition between the reinstated works area and surrounding public realm. Figure 1 provides an overview of the PRR works area.
These works will be undertaken using standard methods, including using jackhammers and backhoes to remove old pavements, and rollers and compactors to prepare the base course/bedding for new paving. Pavers and curb stones will be cut as required using appropriate equipment.
Note: Parts of the PRR works area are located outside the CRL designation. Any works outside the CRL designation are not specifically considered within this DWP. If required, separate resource consents will be applied for these areas
1 Auckland City Rail Link Enabling Works Contract 2 Contamination Delivery Works Plan, Separable Portion 1 – Cut and Cover Works, CRL-PAT-ENV-CON-PLN-000899, Revision 05, 21-03-2016
2 Auckland Unitary Plan Operative in Part, Designation 2500, City Rail Link (CRL), City Rail Link Limited, and Discharge Permit R/REG/2014/5435 and land use consent R/LUC/2014/5428
Connectus 2719 Contamination Delivery Work Plan Addendum: Public Realm Reinstatement
Project: City Rail Link C2 Doc. No. CRL-PAT-RME-AT-RPT-033005
Client: City Rail Link Limited
Revision: 4, Date: 30th October 2018
Figure 1 - Public Realm Plan
2.2 CONSTRUCTION PROGRAMME OVERVIEW
The PRR works will progressively follow the completion of the cut and cover trenched section of the CRL tunnel along Albert Street between Wyndham Street and Customs Street West. As completion of the cut and cover trenched section of the CRL tunnel will occur south to north progressively along Albert Street, so too will the PRR. The exception to this is the Lower Albert Street works between Quay Street and Customs Street West which will occur first to achieve parallel construction timeframes with the Commercial Bay development.
Table 1 provides an overview of the construction staging as it relates to the PRR works. Within each area of works there will be multiple works phases (refer to the CRL C2 CEMP PRR Addendum for further detail regarding works phasing).
Table 1 Construction Staging Overview
to Mills
to Mills
2020
3 SITE MANAGEMENT GOALS
There is no change to the site management goals set out in Section 3 of the CRL C2 CDWP.
4 ROLES AND RESPONSIBILITIES
There is no change to the roles and responsibilities set out in Section 4 of the CRL C2 CDWP.
5 ENVIRONMENTAL SITE MANAGEMENT PRACTICES
5.1 SURFACE WATER AND SEDIMENT CONTROL AND MONITORING
There is no change to the existing methods set out in Section 5.1 of the CRL C2 CDWP and groundwater and perched water will continue to be managed in accordance with the CRL C2 Erosion and Sediment Control Plan (ESCP) (CRL-PAT-ENV-CON-PLN-000897). It is noted that the ESCP Addendum (CRL-PAT-RME-AT-RPT-033016) provides further works specific controls to the CRL C2
Connectus 2719
Project: City Rail Link C2
Client: City Rail Link Limited
Delivery Work Plan Addendum: Public Realm Reinstatement
Doc. No. CRL-PAT-RME-AT-RPT-033005
Revision: 4, Date: 30th October 2018
ESCP and expands the scope of the CRL C2 ESCP to include the PRR phase of works The following measures and controls are no longer required for the PRR works, therefore these controls no longer require consideration within the CRL C2 CDWP Addendum:
Surface water which collects within the construction zones will be pumped to a siltbuster (HB50) or settlement tank(s) before being discharged to the stormwater system
Any further treatment of water (for example, flocculent additives) will be added whilst being processed through the siltbuster (HB50) or settlement tanks.
Surface water which collects within the construction zones will be pumped to a siltbuster (HB50) or settlement tank(s) before being discharged to the stormwater system. If surface water is discharged to stormwater, it must be compliant with 50 times the ANZECC Guidelines for Fresh and Marine Water Quality (2000) for the protection of 95% of marine water species. AC require evidence of testing to demonstrate compliance.
Construction work will be avoided during heavy rainfall events. In the event of an unforeseen heavy rainfall, runoff will collect within the excavation. Works within the excavation will stop until all accumulated water is pumped to the siltbuster Units for treatment. Due to the significant depth and size of the excavation, overflows of collected rainwater are not a concern.
5.2 GROUNDWATER AND PERCHED WATER
There is no change to the existing methods set out in Section 5.2 of the CRL C2 CDWP. Groundwater and perched water will continue to be managed in accordance with the CRL C2 Groundwater and Settlement Monitoring and Contingency Plan (GSMCP) (CRL-PAT-ENV-CON-PLN-000627) It is noted that as the majority of the PRR work will be at surface level the risk of encountering ground and perched water is significantly reduced compared with the cut and cover phase of the project.
5.3 DUST CONTROL AND MONITORING
There is no change to the existing controls and monitoring set out in Section 5.3 of the CRL C2 CDWP. Dust will continue to be managed in accordance with the Air Quality (AQ) DWP (CRL-PATENV-CON-PLN-000900) It is noted that the AQ DWP PRR Addendum (CRL-PAT-RME-AT-RPT033017) provides further works specific controls to the CRL C2 AQ DWP and expands the scope of the CRL C2 AQ DWP to include the PRR phase of works
5.4 SOIL DISPOSAL
There is no change to the existing requirements set out in Section 5.4 of the CRL C2 CDWP.
5.5 MATERIALS IMPORTATION
There is no change to the existing standards and controls set out in Section 5.5 of the CRL C2 CDWP.
5.6 CONTINGENCY MEASURES FOR UNEXPECTED DISCOVERY OF CONTAMINATION
There is no change to the measures and controls set out in Section 5.6 of the CRL C2 CDWP.
Connectus 2719
Project: City Rail Link C2
Client: City Rail Link Limited
Revision: 4, Date: 30th October 2018
