Contamination Delivery Work Plan Addendum

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ENABLING WORKS CONTRACT 2 Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Separable Portion 1 – Cut and Cover Works Document Ref: CRL-PAT-RME-AT-RPT-033005 Revision: 04

FINAL 30th October 2018

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 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 Rev 01

Date 13/04/2018

Details st

1 Draft for CRLL Review

Author

Approver

S. Humphrey

C. Hind

M. Kerr-Ridge 02

5/05/2018

Final

S. Humphrey

C. Hind

M. Kerr-Ridge 03

03/10/2018

Final – Programme Update

S. Humphrey

C. Hind

M. Kerr-Ridge 04

30/10/2018

Final – Programme Update

M. Kerr-Ridge

C. Hind

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.

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 October 2018

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 October 2018

Table of Contents Document information .........................................................................................................................3 Revision History ..................................................................................................................................3 1

Introduction........................................................................................................................7

2

Project Description.............................................................................................................7 2.1

Construction Methodology Overview

7

2.2

Construction Programme Overview

9

3

Site management goals .....................................................................................................9

4

Roles and Responsibilities .................................................................................................9

5

Environmental site management practices .........................................................................9 5.1

Surface Water and Sediment Control and Monitoring

9

5.2

Groundwater and Perched Water

10

5.3

Dust Control and Monitoring

10

5.4

Soil Disposal

10

5.5

Materials Importation

10

5.6

Contingency Measures for Unexpected Discovery of Contamination

10

6

Health and Safety Plan .................................................................................................... 11

7

Works Summary reporting ............................................................................................... 11

8

Conclusion....................................................................................................................... 11

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 October 2018

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 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 consent 2) 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.

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 October 2018

Figure 1 - Public Realm Plan

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

2.2

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 October 2018

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 Albert Street Area of works

Activity Start Date

Approximate Duration

Customs to Quay

February 2019

18 months

Wyndham to Swanson

May 2019

17 months

Swanson to Customs

January 2020

9 months

Wyndham to Mills

September 2020

2 months

Swanson to Mills

April 2020

8 months

Wolfe to Customs

January 2020

12 months

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

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 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:   



5.2

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.

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.

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Connectus 2719 Project: City Rail Link C2 Client: City Rail Link Limited

Contamination Delivery Work Plan Addendum: Public Realm Reinstatement Doc. No. CRL-PAT-RME-AT-RPT-033005 th Revision: 4, Date: 30 October 2018

6 HEALTH AND SAFETY PLAN There is no change to the existing health and safety plans set out in Section 6 of the CRL C2 CDWP.

7 WORKS SUMMARY REPORTING There is no change to the existing drainage system and controls set out in Section 7 of the CRL C2 CDWP.

8 CONCLUSION It is considered that the existing management protocols detailed in the CRL C2 CDWP will appropriately manage the contamination related effects of construction from the PRR.

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