Introduction 1

1. Introduction

The City Rail Link (CRL) project comprises the construction, operation and maintenance of a 3.4 km underground passenger railway, running between Britomart Station and the North Auckland Rail Line (NAL) in the vicinity of Mt Eden Station. The CRL involves the construction of two new underground stations at Aotea and Karangahape, and a redeveloped station at Mt Eden (refer to Figure 1-1). The design and construction of the CRL infrastructure between Aotea and Mt Eden Stations is being delivered by the Link Alliance.

This Air Quality Delivery Work Plan (AQ DWP) has been prepared in relation to the Mt Eden Enabling Works (“the Project”).

Figure 1-1: CRL Route and Location

1.1 Overview of CRL works in Mt Eden

The CRL works in the Mt Eden area involve the construction of the southern section of the tunnel structures and the tie-in to the existing NAL, including the construction of the redeveloped Mt Eden Station. The Mt Eden Active Construction Zone (ACZ) and Construction Support Area (CSA) is generally located between Nikau Street to the north, State Highway 1 (SH1) to the east, Dominion Road to the west and the existing NAL to the south.

The works in this area include:

Construction of an underground grade separation structure near Mt Eden Station; A new Mt Eden Station building incorporating passenger linkages; Modifications to the existing Mt Eden Station platforms; Road over rail bridges at Mt Eden Road, Normanby Road and Ruru Street with sections of road realignment; Grade separation structures for the existing and new rail lines to pass-over and connect with each other;

Pedestrian and cyclist bridge structures at Fenton Street and Porters Avenue; and New road linkages within the reinstated area post-construction.

Given the nature and scale of CRL works in Mt Eden, construction will be undertaken in a staged manner.

This AQ DWP only relates to the first stage of these works, the Mt Eden Enabling Works, as described in Section 2 below.

Following completion of the Mt Eden Enabling Works, works in this area will involve:

Main construction works –these works will include: Tunnel Boring Machine (TBM) operations, structure construction and waterproofing/tanking for cut and cover tunnels, utilities installation, retaining wall for Ruru Street extension, construction of the rail line tieins including junctions and grade separation structures, realignment of the existing Western Line including platform reconstruction, grade separation of Normanby Road, pedestrian / cyclist bridges at Fenton and Porters, construction of the new station buildings. The Main Works will be undertaken from mid 2020 through to 2024. Public realm reinstatement –these works will involve establishing the final finishings and features that will comprise the completed Mt Eden Station and surrounds and will likely to be undertaken from 2021 to first quarter-2024.

1.2 Purpose of the Air Quality DWP

This AQ DWP has been prepared to identify measures to mitigate and manage the potential adverse effects on air quality in the surrounding area during the Mt Eden Enabling Works. The objectives of the AQ DWP are:

To address requirements detailed in the CRL designation and relevant discharge permits for the Aotea to NAL (A2N) resource consent, which provides for the construction and ongoing operation, use and maintenance of the CRL route; Detail various sources of dust, odour and combustion air pollutants that may be created during the enabling works; Highlight specific sensitive locations; Identify dust and odour mitigation methods; Describe methods to minimise the discharge of combustion emissions from vehicles; Describe monitoring methods; and Set out methods for managing complaints regarding discharges into air and keeping compliance records.

This AQ DWP addresses the requirements of CRL designation condition 59 and A2N resource consent conditions 217 to 228 and will be implemented throughout the construction period.

The CRL designation (condition 59) requires the preparation of an AQ DWP, while conditions 217 to 228 of the A2N resource consent require an Air Quality Management Plan (AQMP). These two separate document requirements have been combined and are addressed in this single AQ DWP.

This AQ DWP has been prepared in consultation with the Mt Eden Community and Business Liaison Group (CLG) and reviewed by Independent Peer Review (IPR) prior to submission to Auckland Council (as per designation conditions 7 and 11, and condition 19 of the resource consent conditions).

This AQ DWP has been prepared by Link Alliance and forms part of the Construction Environmental Management Plan (CEMP) for the Project.

1.3 Relevant conditions

Table 1-1 identifies the designation and resource consent conditions relevant to this DWP and where they are addressed in the document.

Table 1-1: Relevant conditions and location in DWP

Condition No. Condition

CRL Designation Conditions

59.1 An Air Quality DWP shall be prepared to avoid, remedy or mitigate the adverse effects on air quality during the construction of the City Rail Link or any part of it.

59.2 The objective of the Air Quality DWP is to detail the best practicable option to avoid dust and odour nuisance being caused by construction works and to remedy any such effects should they occur.

59.3 To achieve the above objective the following shall be included in the Air Quality DWP and implemented as required:

(a) The procedures to be implemented for the continuous monitoring of Total Suspended Particulate (TSP) concentrations and meteorology including, but not limited to, the establishment of two monitoring sites (to the north and south of the site);

(b) Identification of the sensitive locations, and the specific methods for monitoring, including trigger limits to determine whether further action (such as implementation of the mitigation measures discussed below or other mitigation measures) is required;

(c) Procedures for responding to malfunctions with construction machinery or works causing accidental dust discharges including, but not limited to, the requirement to remedy any malfunction within 24 hours;

(d) Procedures for monitoring weather conditions and the requirement that water spray is used on soil stockpiles, any non-paved construction areas, and the wheels of trucks where dust may disperse beyond the site;

(e) Procedures for establishing when the covering of trucks will be required;

(f) Procedures for determining when hard surfaced areas in construction yards and active construction areas should be cleaned including, but not limited to, the requirement that such areas be cleaned whenever dust generation occurs due to traffic on these surfaces;

(g) Procedures for responding to discharges of odour (including in the event of excavation of contaminated sites) including, but not limited to, the requirement to address discharge of objectionable odour by immediately ceasing the activity causing the discharge;

(h) Procedures for equipment inspection (including timeframes for regular inspections), maintenance, monitoring and recording, including

Relevant section of DWP

This document

This document

Section 6.3

Sections 3.3, 6

Section 6.5

Sections 5, 6.3.2,

Section 5

Section 5

Section 6.6

Section 5

Condition No. Condition

baghouses, pressure relief valves and high level alarms to mitigate dust emissions;

(i) Procedures for, where practicable, limiting dust and odour nuisance and the methods for monitoring these procedures including Identification of contingency measures to address identified and verified adverse effects on sensitive receptors. Contingency measures may include options such as: i. Cleaning of air filtration intakes; or ii. Cleaning of other buildings and infrastructure; and

(j) Procedures for responding to any complaints received and the timeframes for response to complaints and reporting;

(k) Cross references to the specific sections in the Communication and Consultation Plan which detail how the communities in the vicinity of construction works are to be communicated with on the management of the adverse effects relating to air quality.

Discharge permit (air –construction) R/REG/2016/1899

217 This resource consent shall expire 15 years after the consent commences unless it has been surrendered or been cancelled at an earlier date pursuant to the RMA.

218 The Consent Holder shall ensure that all processes on the Project work site shall be implemented, operated, maintained, supervised, monitored and controlled so that any emissions authorised by this consent are maintained at the minimum practicable level.

219 Unless provided for by Condition 220, there shall be no dust or odour beyond the boundary of the Project work site caused as a result of on-site processes which, in the opinion of Council, is noxious, offensive or objectionable.

220 Any noxious, offensive or objectionable dust or odour beyond the boundary of the Project work site caused as a result of construction and earthworks activities associated with the Project shall be mitigated as soon as practicable in accordance with the requirements of the certified Air Quality Management Plan as required by Condition 222.

221 The Consent Holder shall ensure that beyond the boundary of the Project worksite, there shall be no hazardous air pollutant caused as a result of construction and earthworks activities associated with the Project that causes, or is likely to cause, adverse effects on human health, environment or property.

222 The Consent Holder shall review the draft Air Quality Management Plan –Aotea Station to North Auckland Line dated May 2016, and submit to Council (Team Leader Central Monitoring) a final AQMP/s which is generally consistent with the draft AQMP provided in support of the application.

223 The final AQMP/s shall be prepared by a Senior Qualified Person, provided to the Council (Team Leader Central Monitoring) for certification at least 20 working days prior to the commencement of construction and shall include:

a. a clear identification of the type and location of the controls proposed;

Relevant section of DWP

Section 5

Section 7.2

Section 7

Noted

This document

This document

This document

This document

This document

Section 5

Condition No.

224 Condition Relevant section of DWP

b. a detailed framework for the management, mitigation and monitoring of construction and earthworks activities associated with the Project; Section 5

c. a focus principally on the sources of dust discharges, and Section 5

d. an assessment of the risk of discharges from each ACZ and the associated CSA. Section 5.1, Appendix C

The final AQMP/s shall also provide detailed methods including, but not limited to, the following matters: a. methods to ensure exposed surfaces remain dampened to minimise dust emissions (possible examples include a water spray system or other suitable system, water carts and other suppression methods); Section 5

b. ensuring a 20 km/hr vehicle speed limit within the ACZs and CSAs; Section 5.2

c. operation of wheel washes; Section 5.2

d. regular sweeping of public roads around the exit points of ACZs and CSAs and sealed vehicle accessways within these areas;

e. measures for supressing dust from any temporary stock piles (demonstrating how they are to be limited to no more than 24 m³ of uncovered spoil at any one time in each ACZ); Section 5.2

Section 5.2

f. measures for the handling of cement associated with the forming of cement stabilised columns, including filter systems and high level alarms where a silo is used; Section 5.2

g. covering of loads of material being delivered and removed from the site; Section 5.2

h. instrument monitoring of dust concentrations (including identification of a monitoring methodology, monitoring network and appropriate alert thresholds) to ensure that any significant dust effects arising from the ACZs or CSAs are identified and remedied as soon as practicable throughout the Project; Section 6.3

i. the locations of instrument dust monitoring sites, including at least three re-locatable and/or fixed monitors to be associated with each of ACZs A, K and M, and the duration of this monitoring;

j. measures for responding to continuous instrument dust monitoring trigger alarms, including contingency measures to reduce measured concentrations below the trigger thresholds and provisions for responding after standard operating hours;

k. measures for undertaking meteorological observations and visual inspections of dust or other air discharges from the Project, to be completed at least on a daily basis, with all relevant information logged; and

l. information regarding complaint logging, investigation and response procedures, training and roles and responsibilities. The Team Leader Central Monitoring shall be requested to respond to the AQMP/s with any suggested changes within 10 working days from receipt of the AQMP; otherwise the AQMP may be considered by the Consent Holder to be certified by the Council. Section 6.3

Section 6.3

Section 6.3

Section 7.2

Condition No. Condition Relevant section of DWP

225 Any change to the AQMP/ shall be submitted to the Council (Team Leader Central Monitoring) for certification. No activity reliant upon a change to the AQMP can be undertaken until the change has been certified. N/A

The Team Leader Central Monitoring shall be requested to respond to the proposed change within 10 working days from receipt of the change; otherwise the AQMP may be considered by the Consent Holder to be certified by the Council.

226 All works shall be undertaken in accordance with the certified AQMP/s. Noted

227 Prior to the commencement of construction, and for the duration of excavation and construction associated with the Project which have the potential for significant dust emissions, the Consent Holder shall install, operate and maintain continuous dust monitoring undertaken using mobile instruments for the purposes of monitoring Total Suspended Particulates (TSP).

The locations, durations and methods of TSP monitoring at each of ACZs A, K and M shall be in accordance with the details in the certified AQMP(s) required by Condition 222.

228 The dust monitoring instruments shall be fitted with an alarm system that sends a warning to the responsible person identified by the AQMP/s when dust concentrations exceed alert levels specified by the certified AQMP/s.

The Consent Holder shall ensure that the responsible person, or other nominated person, is available at all times to take immediate action to reduce dust emissions from the site. Section 6.3

Section 6.3

1.4 Sustainability

The Link Alliance is seeking an Infrastructure Sustainability Council of Australia (ISCA) Infrastructure Sustainability (IS) Rating. Further details can be found in the Project CEMP and Sustainability Rating Management Plan. Project sustainability requirements that relate directly to this AQ DWP are included in Appendix A. These requirements are imbedded within this AQ DWP to ensure that sustainability is a key focus and ‘the way we do things’.

In some cases, the IS requirements and sustainability goals enhance the designation and consent requirements.

1.5 DWP review and updates

This DWP is a live document that will be reviewed and updated at least annually, or as a result of a material change to the project, identification of increasing dust levels or potential for nuisance identified in monitoring required under this DWP, or to address unforeseen adverse contamination effects arising from construction, or unresolved complaints. Refer to Section 6.7 of the CEMP for further detail on the review and updating process.

1.6 DWP authors

This AQ DWP has been prepared by a team of air quality specialists.

The AQ DWP has been authored by Jason Pene, a Senior Environmental Engineer and Principal of Tonkin & Taylor Ltd (T+T), with support from other T+T air quality specialists. Jason has over 18 years of experience in the assessment and management of air quality impacts, including management and monitoring of dust associated with linear infrastructure construction projects.

The AQ DWP has been reviewed by Richard Chilton, a Senior Air Quality Specialist of T+T. Richard has 20 years of experience assessing and managing air quality impacts, and was the technical lead for the assessment of air discharges associated with the regional consenting process for the CRL project.