Air Quality Delivery Work Plan

Karangahape Station Main Works Air Quality Delivery Work Plan

CRL-KRD-RME-LKA-PLN-800018

Revision: 000 Date: January 2020

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| Karangahape Station Main Works

Air Quality Delivery Work Plan

Karangahape Station Main Works Air Quality Delivery Work Plan CRL-KRD-RME-LKA-PLN-800018

This document is uncontrolled when printed. This document should be printed in colour

Revision Status Revision

Date

Version details

Prepared By

Approved By

Rev A

3/10/2019

Draft for Community Liaison Group and Mana Whenua

J Pene, R Butler, E Mace

Peter Roan

Rev B

12/12/2019

Draft for Auckland Council and Independent Peer Review

J Pene

Peter Roan

Rev 000

30/01/2020

Final for submission

J Pene

Peter Roan

Approval Status Name/Title

Signature

Date

Prepared by:

Jason Pene Senior Environmental Engineer

30/01/2020

Reviewed by:

Richard Chilton Senior Air Quality Specialist

30/01/2020

Approved by:

Peter Roan Link Alliance – Consents Lead

30/01/2020

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Air Quality Delivery Work Plan

Table of contents 1. Introduction ............................................................................................. 5 1.1

Karangahape Station ..................................................................................................... 5

1.2

Air Quality DWP Staging ................................................................................................ 5

1.3

Purpose of the Air Quality DWP ..................................................................................... 6

1.4

Relevant Conditions ...................................................................................................... 6

1.5

Sustainability .............................................................................................................. 10

1.6

DWP Review and Updates ........................................................................................... 10

1.7

Air Quality DWP Authors ............................................................................................. 10

2. Karangahape Main Works ...................................................................... 12 2.1

Overview of Works ...................................................................................................... 12

2.2

Discharges to Air ......................................................................................................... 12

2.3

Key Personnel ............................................................................................................. 14

3. Environmental Setting ........................................................................... 15 3.1

Locality ....................................................................................................................... 15

3.2

Meteorology ............................................................................................................... 15

3.3

Sensitive Receptors ..................................................................................................... 17

4. Environmental performance .................................................................. 18 5. Management Procedures ....................................................................... 19 5.1

Dust Risk Assessment .................................................................................................. 19

5.2

Dust Mitigation Measures ........................................................................................... 19

5.2.1.

Operation of Dust Control Equipment .......................................................................... 25

5.2.2.

Equipment Malfunction ................................................................................................ 25

5.3

Review of Dust Mitigation ........................................................................................... 25

5.3.1.

Sources of Information ................................................................................................. 25

5.4

Odour Control during Contaminated Material Handling ............................................... 25

5.5

Control of Engine Exhaust Emissions ............................................................................ 26

5.6

Dust Contingency Measures ........................................................................................ 26

6. Monitoring Requirements ...................................................................... 27

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6.1

Dust Monitoring .......................................................................................................... 27

6.2

Visual Inspection and Monitoring Methods .................................................................. 27

6.3

Instrumental Monitoring ............................................................................................. 28

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Air Quality Delivery Work Plan 6.3.1.

Dust Monitoring ............................................................................................................ 28

6.3.2.

Dust Trigger Levels and Alerts....................................................................................... 29

6.3.3.

Meteorological Monitoring ........................................................................................... 30

6.3.4.

Wind Speed Trigger Dust Alerts .................................................................................... 31

6.3.5.

Alternative Management Approach ............................................................................. 31

6.4

Monitoring Data.......................................................................................................... 32

6.5

Monitoring Equipment Maintenance and Calibration ................................................... 32

6.6

Odour Monitoring ....................................................................................................... 32

7. Communication and Complaints ............................................................ 34 7.1

Project Communications.............................................................................................. 34

7.2

Complaints .................................................................................................................. 34

8. Environmental Training .......................................................................... 35 8.1

Project Staff ................................................................................................................ 35

9. Record Keeping ...................................................................................... 36 9.1

Air Quality Log ............................................................................................................ 36

Appendix A: Record of Consultation ............................................................ 37 A1

CLG Comments ............................................................................................................ 37

A2

IPR Comments............................................................................................................. 38

A3

Auckland Council Review Comments ........................................................................... 39

Appendix B: ISCA Requirements................................................................... 40 Appendix C: Staging Drawings...................................................................... 41 Appendix D: Dust Risk Assessment Procedure ............................................. 42 Appendix E: Dust Risk Controls Sheet........................................................... 45 Appendix F: Air Quality Log Sheet ................................................................ 46

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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 in the vicinity of Mt Eden Station. The CRL also involves the construction of two new underground stations at Aotea and Karangahape and a redeveloped Mt Eden station (refer to Figure 1-1). The design and construction of the CRL infrastructure between the Aotea and Mt Eden Stations is being delivered by the Link Alliance.

Figure 1-1: CRL Route and Location

This Air Quality Delivery Work Plan (DWP) has been prepared in relation to the main construction works for the new Karangahape Station.

1.1 Karangahape Station The Karangahape Station consists of two entrances, one at Beresford Square / Pitt Street and the other at Mercury Lane, linked together by platforms with two mined tunnels approximately 32m below Pitt Street. The Station will also comprise equipment rooms, ventilation systems and emergency egress at both Mercury Lane and Beresford Square / Pitt Street.

Given the nature and scale of the Karangahape Station construction, works will be undertaken in a staged manner, involving: • • •

Early works (demolition, network utility relocation and site establishment works) – to be undertaken from October 2019 through to early 2020; Main construction works (construction of the station and mined tunnels for the rail tracks) – to be undertaken from early 2020 through to late 2023; and Public realm reinstatement – likely to be undertaken from late 2022 to late 2024.

1.2 Air Quality DWP Staging Page 5

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Air Quality Delivery Work Plan To reflect the staged construction approach for the Karangahape Station, a series of Air Quality DWPs are being prepared.

This Air Quality DWP addresses the Karangahape Station main works, which are detailed in the Construction Environmental Management Plan (CEMP), and summarised in Section 2 of this DWP. A further Air Quality DWP will be prepared for the future station superstructure and public realm reinstatement works.

1.3 Purpose of the Air Quality DWP This Air Quality DWP has been prepared to identify measures that will be implemented to mitigate and manage the potential adverse effects on air quality in the surrounding area during the Karangahape Station main works. The objective of the AQ DWP is to detail the best practicable options to avoid, remedy, or mitigate the adverse effects of discharges of dust, odour and hazardous air pollutants generated by the main construction activities.

This Air Quality DWP details the following matters: • • • • •

Sources of dust, odour and combustion air pollutants that may be created during the main works; Sensitive locations and receivers within/surrounding the works area; Methods to manage dust and odour emissions and mitigate impacts on local air quality; Methods to minimise the discharge of combustion emissions from vehicles; Monitoring methods to be implemented during the works; and Procedures for responding to complaints regarding discharges into air and keeping compliance records.

This Air Quality DWP addresses the requirements of CRL designation condition 59 and the Aotea to North Auckland Line (A2N) resource consent R/REG/2016/1899 conditions 217 to 228 and will be implemented throughout the main works period.

The CRL designation (condition 59) requires the preparation of a DWP while conditions 217 to 228 of the discharge permit (R/REG/2016/1899) require an Air Quality Management Plan. These two separate document requirements have been combined and are addressed in this single Air Quality DWP. This Air Quality DWP has been prepared in consultation with the Karangahape Community and Business Liaison Group (CLG) and reviewed by the Independent Peer Reviewer (IPR) prior to submission to Auckland Council (as per designation conditions 7 and 11, and condition 19 of the resource consent conditions). A record of consultation outcomes (CLG and IPR) is included in Appendix A. This Air Quality DWP has been prepared by Link Alliance and forms part of the CEMP for the Karangahape Station main works.

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

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Air Quality Delivery Work Plan Table 1-1: Relevant conditions and location in Plan

Condition No.

Condition

Relevant section of DWP 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.

This document

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.

This document

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);

Section 6.3

(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;

Sections 3.3, 6

(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;

Section 6.5

(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;

Section 6.3.2, 5

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

Section 5

(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;

Section 5

(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;

Section 6.6

(h) Procedures for equipment inspection (including timeframes for regular inspections), maintenance, monitoring and recording, including baghouses, pressure relief valves and high level alarms to mitigate dust emissions;

Section 5

(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:

Section 5

i. Cleaning of air filtration intakes; or Page 7

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Air Quality Delivery Work Plan

Condition No.

Condition

Relevant section of DWP

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;

Section 7.2

(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.

Section 7

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.

This document

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.

This document

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.

This document

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.

This document

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.

This document

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.

This document

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:

Section 5

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

224

Page 8

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.

5.1, Appendix C

The final AQMP/s shall also provide detailed methods including, but not limited to, the following matters:

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Section 5

Air Quality Delivery Work Plan

Condition No.

Condition

Relevant section of DWP

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); 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;

Section 5.2

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

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;

Section 6.3

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;

Section 6.3

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

Section 6.3

l. information regarding complaint logging, investigation and response procedures, training and roles and responsibilities.

Section 7.2

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.

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 Page 9

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

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N/A

Air Quality Delivery Work Plan

Condition No.

Condition

Relevant section of DWP

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).

Section 6.3

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.

Section 6.3

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.

1.5 Sustainability The Link Alliance is seeking an Infrastructure Sustainability Council of Australia (ISCA) Infrastructure Sustainability (IS) Rating. Further details can be found in the CEMP and Sustainability Rating Management Plan. Project sustainability requirements that relate directly to this AQ DWP are included in Appendix B. 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 resource consent requirements.

1.6 DWP Review and Updates This Air Quality DWP is a live document that will be reviewed at least annually, or as a result of a material change to the project, or to address unforeseen adverse air quality effects arising from construction, or unresolved complaints. Any material changes to the Air Quality DWP must be approved by Auckland Council prior to any on-site activity reliant upon the change commencing.

Refer to the CEMP for further detail on the review and updating process.

1.7 Air Quality DWP Authors This DWP has been prepared by a team of air quality specialists including: •

•

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The 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 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 | Karangahape Station Main Works

Air Quality Delivery Work Plan technical lead for the assessment of air discharges associated with the regional consenting process for the CRL project.

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2.

Karangahape Main Works 2.1 Overview of Works

The main construction works for the new Karangahape Station are described in detail in the CEMP and summarised in Table 2-1 below (refer also the drawings provided at Appendix C).

It should be noted that construction of the Mercury Lane and Beresford Square station entrance superstructures and other building units, along with the internal station fit out and public realm reinstatement works will form part of separate Air Quality DWPs to be prepared in the future prior to the commencement of the respective works.

Table 2-1: Overview of Main Works Construction Activities

Works location

Overview of construction activities

General establishment works

• Installation of hoardings and temporary traffic management around active construction zones

Mercury Lane

• Construction of the temporary shaft at Mercury Lane to provide access for tunnel construction. Works will include excavation, piling and construction of the above ground acoustic enclosure surrounding the shaft.

• Mining of platform tunnels (likely using a roadheader) from the temporary shaft through to the Beresford Square station box.

• Diaphragm wall construction and piling around the perimeter of the Mercury Lane station box.

• Construction of the Mercury Lane station box, involving: top down construction works - excavation and floor slab construction; and bottom up construction works - rock breaking and excavation, construction of floor slab construction and rail platforms.

• Off-site disposal of excavated material from the temporary shaft construction, mining of platform tunnels and station box construction.

Beresford Square

• Diaphragm wall construction and piling around the perimeter of the Beresford Square station box.

• Construction of the Beresford Square station box, involving: top down construction works - excavation and floor slab construction; and bottom up construction works - rock breaking and excavation, construction of floor slab construction and rail platforms.

• Off-site disposal of excavated material from the station box construction.

Construction Support Areas

• Continued establishment of Construction Support Areas (CSA) at Beresford Square and Mercury Lane (following on from the establishment works undertaken as part of the early works and authorised by the early works plans).

This will include the bentonite plant, water treatment plant and temporary spoil storage areas.

• Operation of the Beresford Square and Mercury Lane CSAs.

2.2 Discharges to Air The main discharge to air from the construction activities outlined in Table 2-1 will be particulate matter (dust). Dust has the potential to cause nuisance or soiling of property if deposited in sufficient quantities in the environment. Fine dust particles present in dust have the potential to Page 12

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Air Quality Delivery Work Plan affect respiratory heath while suspended in air. Bentonite powder used in the construction of diaphragm walls may contain respirable crystalline silica (RCS), which can also have respiratory health effects.

The majority of main works construction activities, including mining and excavation of tunnels and station platforms and construction of station boxes (below the ground level floor slab), will occur underground.

Dust generated from below surface activities is likely to be relatively well contained and discharged via active ventilation or passively through perforations in the ground level floor slab at Beresford Square and Mercury Lane. The details of ventilation design are yet to be confirmed as of preparation of this Air Quality DWP but will be specified to maintain underground dust and respirable particulate levels within Workplace Exposure Standards (which may include use of methods to remove suspended particulate) and avoid visible dust emissions on discharge.

The following proposed activities have the potential to result in discharges of particulate matter to air: • • • • • • • •

Excavation, drilling, and mining; Outdoor spoil handling/removal; Wind erosion of spoil and other stockpiled material; Mixing of bentonite powder (stored in bags) to form bentonite slurry; Piling; Concrete breaking (as part of the diaphragm wall construction); Backfilling of excavation; and Movement of vehicles over unsealed surfaces (this includes trucks, loaders and excavators required for the tunnel excavation and spoil removal, and the delivery of construction materials such as concrete and steel).

Other minor discharges to air could include: • •

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Combustion emissions from vehicles and machinery on site, which can affect respiratory health in the environment with sufficient exposure; and Odour from excavation or disturbance of contaminated soil (if encountered), which has the potential to cause nuisance.

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Air Quality Delivery Work Plan

2.3

Key Personnel

The key personnel responsible for implementation of this Air Quality DWP are identified in Table 2-2.

However, all site personnel are responsible for following the requirements of the DWP. Refer to the CEMP for further detail on roles and responsibilities.

Table 2-2: Key Personnel and Contact details

Role

Name

Karangahape Station Project Manager

Jonathan Hill

Karangahape Station Construction Manager

Dan Trotman

Environmental and Sustainability Manager

Sarah Sutherland

Link Alliance Karangahape Main Works Air Quality Specialist

Jason Pene

Link Alliance Communication and Engagement Manager

Rachel Blundell

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3.

Environmental Setting

This section of the Air Quality DWP describes the environment surrounding the works site in terms of meteorological influences on the transport of air contaminants and sensitivity of adjacent activities to those discharges.

3.1 Locality The new Karangahape Station will be constructed beneath the intersection of Karangahape Road and Pitt Street with station entrances at Beresford Square and Mercury Lane. The site is located in an urban environment adjacent to reasonably dense urban development comprising a range of commercial, residential and recreational activities. Due to the density of development and human occupation in surrounding areas, the receiving environment in general, is of a high sensitivity to air pollution.

3.2 Meteorology Figure 3-1 shows wind roses of wind speeds and directions measured at the Niwa weather station at the Auckland Museum of Transport and Technology (MOTAT), Western Springs over year round, summer (December to February) and winter (June to August) periods.

The weather station is located approximately 3 km south west of the works area. Wind measurements at this station are likely to be generally representative of conditions in central Auckland as it is relatively free from nearby obstructions or eddies created by adjacent buildings.

Although localised topographical features and adjacent buildings at the Mercury Lane and Beresford Square sites are likely to alter wind conditions, the wind direction frequency trends illustrated below are likely to be broadly similar to those experienced at the MOTAT site.

Based on the wind roses in Figure 3-1, winds are predominantly from the southwest and northeast.

Sensitive receivers located to the northeast and southwest of the main works construction site, respectively, are likely to be most frequently exposed to any off-site dust emissions from construction activities. The amount of dust that will be generated by the works will also depends on whether conditions are dry, and wind speeds, with faster wind speeds increasing effects of wind erosion and the distance that the dust travels.

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Air Quality Delivery Work Plan All months, 2016-2019, Calms = 5.52%

Winter months, 2016-2019, Calms = 6.28%

Summer months, 2016-2019, Calms = 2.25%

Figure 3-1: Wind rose frequency analyses of wind speeds and directions at the Auckland MOTAT weather station for August 2016 to August 2019, year round, winter and summer months. Source: NIWA Cliflo database.

Figure 3-2 shows that the expected drier months are during summer, when wind speeds also tend to be higher. Summer winds are dominated by a south-westerly wind which will transport any emitted dust towards sensitive receptors to the northeast of site.

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Figure 3-2: Percentage of wet days (rain exceeding 1 mm) over each month of the year at MOTAT. Source: NIWA Cliflo database.

3.3 Sensitive Receptors The site is located in a mixed use (Business - City Centre) zone, on the southern fringe of the Auckland CBD, and features a mix of adjacent land use activities.

Nearby activities (within 100 m of works activities) that may be sensitive to dust nuisance include: •

• • • • • •

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Residential apartments – located on Beresford Square, Samoa House Lane, Day Street, Hopetoun Street, Pitt Street, Poynton Terrace, Mercury Lane, Cross Street, Karangahape Road, East Street, Galatos Street, South Street, and Canada Street.

Hostel accommodation on Mercury Lane, Pitt Street, and Galatos Street.

Bars, cafes and restaurants, particularly where premises include outdoor dining or entertainment areas.

Pedestrian access and parked vehicles along neighbouring roads.

Auckland Methodist Central Parish, Pitt Street.

Central Auckland Fire Station and St Johns Ambulance Station, Pitt Street.

Retail, office and commercial premises.

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Air Quality Delivery Work Plan

4.

Environmental performance

As required by the CRL designation conditions and the A2N resource consent conditions, the purpose of this DWP is to ensure that construction air quality effects are kept to a practical minimum, recognising the sensitivity of the environment within which the works are being undertaken.

The key air quality compliance requirement for construction activities is that dust and other air discharges from the activities do not result in offensive or objectionable levels of dust or other contaminants beyond the site boundary.

A range of air quality management and monitoring measures are specified in Sections 5 and 6 of this DWP that shall be implemented during construction in order to minimise the potential for adverse air quality effects and avoid the occurrence of offensive or objectionable dust or contaminants in the surrounding environment.

These measures include monitoring trigger levels and response actions, which are intended to provide operational feedback to improve air quality management and avoid the effects described above. However, it should be noted that they are not intended as environmental performance standards in and of themselves.

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5.

Management Procedures

A range of routine measures will be implemented to manage and mitigate the effects of discharges of dust, odour or construction vehicle exhaust emissions during the main works. Additional mitigation may also be required in the event that: • • •

Monitoring indicates that abnormal discharges of dust are occurring; Weather conditions are changing such that dust or odour discharges are more likely as determined using the Dust Risk Assessment; and / or Complaints are received regarding discharges of dust, odour or construction vehicle exhaust emissions.

If the available mitigation methods are unsuccessful in controlling discharges (i.e. dust and odour) that cause significant adverse effects on receptors beyond the main works boundary, the activities causing the discharge shall be suspended until adequate mitigation can be put in place.

5.1 Dust Risk Assessment To provide guidance to the Environmental and Sustainability Manager, and area supervisors on implementing dust mitigation, the main works will use a Dust Risk Assessment (DRA) approach.

The DRA is described in Appendix D, and assigns a risk classification to each proposed construction activity with the potential to generate dust based on the scale of potential dust emissions and local environmental conditions (including sensitivity of adjacent activities and weather conditions).

As the dust risk is dependent on local environmental conditions, the dust risk associated with activities should be re-calculated as conditions change.

A “traffic light” indication of dust risk will be posted in each work area so that Project staff are aware of the dusk risk. The dust risk will be indicated as: • • •

Low risk (green).

Moderate risk (orange).

High or extreme risk (red).

5.2 Dust Mitigation Measures Dust management measures are specified for construction activities that will occur above ground level in Table 5-1, and for below ground activities in Table 5-2. Dust management measures may differ based on the dust risk of the activity calculated in accordance with Appendix D. The control measures specified for the calculated dust risk level shall be employed in addition to the measures for all preceding levels– e.g. a medium risk activity requires application of measures applicable to the corresponding low risk activity as well as measures specified for medium risk.

Alternate methods may be employed after the effectiveness of those methods is demonstrated and this DWP updated accordingly. The list of control methods is not exhaustive and additional methods may be found to be effective.

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Air Quality Delivery Work Plan Table 5-1: Dust management and mitigation measures for above ground activities.

Above ground dust source

Dust risk level1

Control measure(s)

Personal responsible

Enclosed stockpiles

Low

• Minimise handling of stockpiled material and drop heights to stockpiles during unloading to decrease potential for dust generation.

• Minimise vehicle entry and exit to/from the enclosure to maintain containment of dust.

Environmental Sustainability Manager or delegated person

Outdoor stockpiles

Low

• Store stockpiled material containing a high content of fine material indoors or undercover where practicable.

• Outdoor uncovered stockpiling will be limited to a volume of no more than 24 m3 at any one time in an active construction zone (ACZ). Such measures are not necessary where the material has a low dust potential, such as where washed aggregate is stored.

• Outdoor stockpiles of spoil within CSAs are to be maintained in damp condition with regular application of water (such as via water sprays).

• Windbreak fencing or other wind reduction structures of no less than 3 m in height shall be installed along the periphery of outdoor spoil storage areas of more than 24 m3 adjoining a boundary with private property. Fencing material should be of a porosity of approximately 50%.

• Limit the height of any outdoor stockpiles to reduce wind entrainment (generally no greater than 3 m).

• Orientate outdoor stockpiles to maximise wind sheltering as much as practicable.

• Keep active stockpiles damp at all times or bunker or cover stockpiles of fine materials.

• Dampen, cover or stabilise inactive stockpiles if they are producing visible dust emissions.

• Stabilise stockpiles using various means depending on the length of inactivity (e.g. soil binders if inactive for 28 days).

• Minimise handling of dry stockpiled material and drop heights to stockpiles during unloading to decrease potential for dust generation.

Environmental Sustainability Manager or delegated person

1 Dust risk levels for each activity will be dependent on environmental conditions and are to be calculated in accordance with the procedure described in Appendix C. Page 20 | Karangahape Station Main Works

Air Quality Delivery Work Plan

Above ground dust source

Surface vehicle movements (over sealed and unsealed surfaces)

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Dust risk level1

Control measure(s)

Medium

• Bunker or cover stockpiles of fine, dry materials if stockpile is existing for prolonged periods (greater than 1 month).

• Maintain active stockpiles in damp condition with regular watering.

• Dampen inactive stockpiles if they are producing visible dust emissions.

• Utilise windbreak fences or temporary bunkers if they are producing visible dust.

Low

• • • • •

Medium

• In dry conditions (e.g. less than 1 mm of rain in the preceding 48 hours), maintain unsealed surfaces in regular use in damp condition through surface watering (e.g. with water carts or fixed irrigation).

• If water supply for surface watering is restricted, synthetic dust suppressants may be used as an alternative. The use of recycled oil-based suppressants is expressly prohibited.

High

• Maintain regularly used unsealed road surfaces in damp condition through surface watering in all conditions.

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Limit vehicle speeds to 20 km/h (or less) within the site.

Limit load sizes to avoid spillages.

Cover loads of dry fine materials leaving or entering the site.

Minimise on-site travel distances through appropriate site layout and design.

Minimise mud and dust track out from unsealed areas to sealed areas by using wheel cleaning facilities at site exits to sealed roads.

• Wheels of all trucks exiting the Site to public roads are to be inspected and washed as required to prevent tracking of material off-site.

• Sealed access routes are to be inspected on a weekly basis (at a minimum) and deposited material is to be cleaned with a vacuum sweeper truck as required.

• Any material identified to be tracked onto public roadways during regular inspections (or via notification from the public) is to be cleaned with a vacuum sweeper truck.

Personal responsible

Environmental Sustainability Manager or delegated person

Air Quality Delivery Work Plan

Above ground dust source

Dust risk level1

Control measure(s)

Personal responsible

Excavation and mining

Low

• Limit the extent of excavation, mining and material handling activities in exposed areas carried out during dry and/or windy conditions as far as practicable.

• Limit drop heights of material during handling, including from any conveyor transfer points.

• Stabilise exposed areas not required for construction, access or parking, along with completed fill and spoil areas as soon as practicable.

• Maintain dry surfaces of active earthworks and mining areas in damp condition. This shall include pre-watering of active surfaces, prior to excavation and mining allowing enough time for moisture to penetrate the soil.

• Remove excavated spoil from site on a regular basis to minimise the need to temporarily stockpile material.

Environmental Sustainability Manager or delegated person

Medium and High

• Maintain surfaces of active earthworks areas in damp condition during excavations in dry weather. This should include pre-watering of dry soil surfaces, prior to excavation allowing enough time for moisture to penetrate the soil.

• Only wet cutting of concrete shall be undertaken.

• Any breaking of concrete shall be done under controlled conditions (e.g. using water sprays or fog cannons directed at where the breaking is occurring).

Loading and unloading of dry material

Medium

• Limit loading or unloading during windy conditions that cause dust to be emitted beyond the site boundary.

• Cover loads of fine, dry materials.

Environmental Sustainability Manager or delegated person

Unpaved surfaces (including roads and yard areas)

Low

• Limit the amount of unpaved surfaces as much as possible.

• Use water sprays or watering trucks to dampen dry unpaved surfaces.

• Stabilise cleared areas not required for construction, access or for parking if liable to cause excessive dust during windy conditions. Methods may include placing metal or other coarse material on surfaces.

Environmental Sustainability Manager or delegated person

Piling

Low and Medium

• All spoil shall be placed in a pre-identified stockpile location and removed from site as soon as possible.

• Any spilled material shall be cleaned up immediately.

Environmental Sustainability Manager or delegated person

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Above ground dust source

Dust risk level1

Control measure(s)

Personal responsible

Use and handling of bentonite powder

All dust risk levels

• Emptying of bentonite powder bags and mixing of bentonite shall occur within an enclosure.

•

Environmental Sustainability Manager or delegated person

Rock drilling in exposed areas

Medium and High

• Drills used on rock or concrete in exposed areas shall be operated with dust suppression mechanisms where practicable.

Environmental Sustainability Manager or delegated person

Miscellaneous

All dust risk levels

• Ensure sufficient water is available for dust sprays on-site.

• Taking account of daily of weather forecast wind speed and wind direction, and the condition of any excavated spoil (such as its dampness) before commencing an operation that has a high wind potential.

• Installing wind fences where practicable and appropriate. Effectiveness is greatest where fencing is perpendicular to the prevailing northeast and southwest winds with porosity of about 50%.

• Maintenance of surface moisture content: Watering or wet suppression shall be used to dampen dry or dusty exposed areas.

Environmental Sustainability Manager or delegated person

Table 5-2: Dust management and mitigation measures for below ground activities*.

Below ground dust source

Dust risk level2

Control measure(s)

Personal responsible

Surface vehicle movements (over unsealed surfaces)

Low

• Limit vehicle speeds to 20 km/h.

• Limit load sizes to avoid spillages.

Medium

• Maintain dry surfaces of active earthworks and mining areas in damp condition.

Environmental Sustainability Manager or delegated person

2 The dust risk level associated with below ground activities are considered “Low” as the only point of exposure for dust is from the ventilation system.

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Air Quality Delivery Work Plan

Below ground dust source

Dust risk level2

Control measure(s)

Personal responsible

Excavation and mining

Low

• Stabilise exposed areas not required for construction, along with completed fill and spoil areas as soon as practicable.

• Only wet cutting of concrete shall be undertaken.

• Any breaking of concrete shall be done under wet conditions (such as a water spray or fog directed at where the breaking is occurring).

Environmental Sustainability Manager or delegated person

Medium

• Pre-watering of active surfaces, prior to excavation and mining allowing enough time for moisture to penetrate the soil.

Low

• Drills used on rock or concrete shall be operated with dust suppression mechanisms where practicable.

Medium

• Pre-dampen all rock or concrete pre-drilling.

Low

• Locate and orientate active ventilation exhaust vents away from nearest site boundaries

Rock drilling

Underground construction ventilation

Environmental Sustainability Manager or delegated person Environmental Sustainability Manager or delegated person

• Apply additional management systems (such as misting sprays) are installed on the output of the ventilation system • Review ventilation exhaust vent location, relocate or re orientate vents if ventilation dust is transported beyond the site boundary. * Measures are specified in this table to manage/mitigate emissions of dust from below ground activities to atmosphere (e.g. via ventilation exhaust vents). Further measures may be required to manage indoor air quality in below ground work spaces.

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Medium

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5.2.1. Operation of Dust Control Equipment The dust control equipment supply subcontractor will provide information on the following: •

Procedures for equipment inspection (including timeframes for regular inspections), maintenance, monitoring and recording, including baghouses, pressure relief valves, high level alarms and dust suppression mechanisms such as fog canons or sprays.

5.2.2. Equipment Malfunction If construction equipment fails and causes accidental dust discharges, it will be shut down immediately and the fault repaired and tested prior to being allowed to continue operation.

If equipment associated with dust control fails (such as a baghouse and underground ventilation systems) the construction activities reliant on the equipment will be suspended until the fault can be repaired.

The location, duration and time of any dust discharge caused by equipment failure will be recorded in the Air Quality Log (described in Section 9.1 and example log sheet provided in Appendix F).

5.3 Review of Dust Mitigation When the site team is alerted to a potential off-site dust nuisance through any of the monitoring techniques described in Section 6 of this DWP, or as a result of a complaint from a third party, the Construction Manager / Site Supervisor will immediately undertake a review of site activities to determine the source of the dust and implement further mitigation measures as required in order to reduce the dust generation to acceptable levels. The Construction Manager / Site Supervisor will notify the Environmental and Sustainability Manager as appropriate.

In general, the additional mitigation will be those measures set out in Table 5-1 and Table 5-2.

Once the additional mitigation has been implemented the Construction Manager / Site Supervisor will review the monitoring data to ensure that it has been effective.

5.3.1. Sources of Information Information necessary for determining the DRA and the general dust control measure that shall be implemented during the works can be obtained by the site team from the following are sources: •

• •

Site specific monitoring web site where Total Suspended Particulate (TSP) and meteorological data can be accessed (to be established by the Link Alliance prior to the commencement of monitoring); Met Service: http://www.metservice.com/towns-cities/auckland/auckland-central; and MetVUW North Island forecast charts: http://metvuw.co.nz/forecast/.

5.4 Odour Control during Contaminated Material Handling Odour may be emitted if contaminated soil is encountered during the excavation works, depending on the nature of the contamination. This section of the Air Quality DWP sets out the mitigation required by CRL designation Condition 59.3(g) for minimising any potential for odour if contaminated material is encountered.

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Air Quality Delivery Work Plan Odour emissions will be monitored in accordance with Section 6.6 of this DWP during the excavation of contaminated material and the following techniques considered if necessary: • • •

Limiting the time that the odorous material in the excavation is exposed; Removing excavated odorous material from site as quickly as possible in covered trucks; and The use of odour masking agents, chemical counteractants or digestive deodorant sprays.

If significant odour is detected and the odorous material cannot be removed quickly and odour masking agents, chemical counteractants or digestive deodorant sprays are not immediately available, the odorous material shall be covered with uncontaminated soil or other suitable material to suppress odour emissions, and work in that area suspended until suitable mitigation measures can be put in place.

5.5 Control of Engine Exhaust Emissions The following key actions shall be carried out to minimise smoke and combustion by-product emissions from vehicle, machinery or generator engine exhausts: •

• •

•

Electrical generators or other stationary engines are to be sited and associated exhaust discharges are to be oriented to avoid exhaust discharges towards adjacent site boundaries (particularly windows, balconies, accessible terrace areas and air intakes) as far as practicable; All engines used on the site will be maintained at least in accordance with manufacturers’ requirements; Where excessive exhaust smoke is identified from any engine, it is to be serviced as soon as is practicable and the vehicle or piece of equipment is to remain out of service until such maintenance has been completed; and Unless warm-up or turbo maintenance procedures require it, construction vehicles will not be left idling while parked or unattended.

5.6 Dust Contingency Measures In the event of significant on-going dust emissions that are unable to be mitigated through the measures described in section 5.2 and are verified to have caused offensive or objectionable dust inside buildings surrounding the works area, the Environmental Sustainability Manager (or delegated person) shall investigate the implementation of dust contingency measures. The investigation is to consider the nature and scale of dust exposure and adverse effects at adjacent properties and the practicability of implementing contingency measures, including: •

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Commercial cleaning of buildings and infrastructure, including air ventilation intakes, at adjacent properties that are affected by adverse effects of dust.

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6.

Monitoring Requirements 6.1 Dust Monitoring

The overall approach to dust control for the works will be based on visual monitoring combined with targeted ambient instrumental dust monitoring; good management of the construction areas; and a rapid response to any of the triggers outlined in Sections 6.3.2 and 6.3.4 or complaints received.

Good practice focusing on proactive measures will aid in avoiding significant dust emissions, however if dust emissions do occur, the monitoring will help to identify such occurrences and enable a prompt response.

6.2 Visual Inspection and Monitoring Methods Visual monitoring of all construction areas will be undertaken on a daily basis, or more frequently if conditions change. This type of monitoring relates to the control measures described in Section 5 of this DWP and will include proactive measures to avoid dust emissions. Table 6-1 below describes the visual dust monitoring programme that will be implemented during construction.

Table 6-1: Visual dust monitoring programme

Monitoring activity

Frequency

Check weather forecasts for strong winds and absence of rainfall to plan appropriate work schedule and dust management response.

Daily

Inspect land adjacent to the site, construction exits and adjoining roads for the presence of dust deposition and/or accumulation of dust material.

Twice daily

Inspect underground ventilation system exhaust vents (when in use) for visible dust emissions or deposition

Twice daily

Observe weather conditions including wind and rain via observations and data outputs from weather stations.

Daily and as conditions change

Inspect all exposed un-stabilised surfaces for dampness and that the extent of those areas is being minimised.

Daily and as conditions change

Inspect stockpiles to ensure enclosure, covering, stabilisation or dampness.

Ensure stockpiles are no greater than a combined 24 m3 and less than 3 m in height where possible or appropriate.

Daily and as conditions change

Inspect dust generating activities to ensure dust emissions are effectively controlled.

Daily and as new activities are commenced

Inspect watering systems (sprays and water carts) to ensure equipment is maintained and functioning to effectively dampen exposed areas.

Weekly

Monitor dust generating activities and water application rate.

Daily in dry conditions and as wind conditions change

Check for dust on local roads being used to access the site.

Daily

Inspect any wheel wash equipment to ensure effective operation and that sediment laden water is not being tracked off site by vehicles.

Daily during spoil removal, weekly at other times

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6.3 Instrumental Monitoring 6.3.1. Dust Monitoring Continuous instrumental monitoring of ambient dust levels (concentrations) will be carried out at representative locations adjacent to sensitive areas when in the vicinity of dust generating activities (e.g. activities described in section 2.2).

Condition 224 (i) of the A2N resource consent infers that three dust monitors are to be associated with the Karangahape Station Active Construction Zones (ACZs). Two monitors are proposed to be located at each of the Mercury Lane and Beresford Square ACZs. The initial locations of the Mercury Lane monitors have been determined as follows: • •

At 2 Mercury Lane adjacent to the Cross Street corner. This site is intended to monitor particulate levels downwind of the Mercury Lane ACZ in prevailing southwest winds.

At the corner of Canada and East Streets. This site is intended to monitor particulate levels downwind of the Mercury Lane ACZ in northeast winds and identify any contribution from the adjacent motorway junction in southwest winds.

Monitoring locations at Beresford Square are yet to be confirmed but are proposed to include locations downwind of the Beresford Square ACZ and downwind of outdoor storage areas in the adjoining CSA. The location of the monitors may need to be re-evaluated, and potentially moved, by the Environmental and Sustainability Manager (or delegated person) if the location of dust generating activities shift to continue to provide effective monitoring of particulate levels. As required by Condition 227 of the A2N discharge permit R/REG/2015/1899, ambient dust monitoring will commence prior to activities that have the potential for significant dust emissions.

Dust monitors have been installed at Mercury Lane for the early works phase (including building demolition activities and establishment of the Mercury Lane construction support area and working platform)3.

Particulate instrumental monitoring for the main works will include: • • • • • •

3

Continuous instrumental monitoring of dust at the locations identified above; Calculation of 1-hour average concentrations from real-time monitoring data; Remote display of real-time particulate data (e.g. via the internet); Provision for alarms on 1-hour average concentrations measured above dust trigger levels (visual and/or via internet, email and mobile phone – refer Section 6.3.2); Recording/logging of monitoring data; and Where practicable the monitors shall be located in accordance with AS/NZ 3580.1.1:2016 Method for Sampling and Analysis of Ambient Air – Guide to Siting Air Monitoring Equipment.

Authorised by the CRL Enabling Work Outline Plan – Karangahape Road Demolition Works (Council reference OPW60339200), confirmed by Auckland Council in June 2019 and the Karangahape Early Works Outline Plan (OPW reference OPW60347591) Page 28 | Karangahape Station Main Works

Air Quality Delivery Work Plan Dust Profiler particle counters manufactured by Aeroqual are to be installed to monitor dust at the Mercury Lane locations identified above. Other options that meet the requirements of the CRL designation and resource consent conditions include: • •

Remote nephelometers; or Beta attenuation monitors.

6.3.2. Dust Trigger Levels and Alerts Dust monitoring results will be compared with trigger levels to indicate where dust levels may have the potential to cause adverse air quality effects and where modification to dust management measures may be required to avoid this outcome.

In the first instance, trigger levels published by the Ministry for the Environment (MfE)4 are adopted as operational dust trigger levels. In the event of monitoring results exceeding the trigger level, response actions will be undertaken as outlined below. The trigger level values that will be used for the main works are described in Table 6-2.

Table 6-2: Dust trigger levels

Discharge

Trigger Level

Dust monitoring*

• MfE recommended trigger values for TSP concentrations: − 200 µg/m3 (rolling 1-hour average) OR • MfE recommended trigger values for PM10 concentrations: − 150 µg/m3 (rolling 1-hour average)

• Evidence of dust on windows or cars (a finger run down the glass leaves a clear line) • Dirt on clean washing *The dust monitoring trigger levels should be updated to reflect the method of monitoring employed, if required (refer below). ** The MfE recommended trigger values do not relate specifically to rolling averages, which are specified in this case to provide instantaneous feedback on dust levels.

Dust deposition

The dust monitoring trigger levels should be reviewed through regular (at least monthly) review of monitoring results. The regular review should include comparison with: • • • •

The trigger alerts specified in Table 6-2; A review criterion for TSP concentrations of 60 µg/m3 (24-hour average); Visual monitoring records; Dust complaints.

If review of monitoring results indicate the triggers specified in Table 6-2 have not provided suitable advance indication of potential adverse air quality effects, the triggers may require modification. The monitoring equipment will be set up with text alerts to key personnel in the relevant work zone, when dust concentrations exceed the trigger values set out in Table 6-2. At a minimum this will include: • 4

The Karangahape Station Project Manager;

Ministry for the Environment. 2016. Good Practice Guide for Assessing and Managing Dust: Ministry for the Environment.

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Air Quality Delivery Work Plan • • •

The Karangahape Station Construction Manager; The Environmental and Sustainability Manager; and The Karangahape Station Site Supervisor.

If personnel change, the Instrument Technician will be contacted to update the alerts.

If a dust trigger alert is sent, one of the above staff members will immediately (within 30 minutes) respond and investigate the cause of the alert. This investigation will: • •

Determine if the alert is real and not caused by equipment malfunction; and Identify the source of dust and check to see that all of the required mitigation measures are being implemented.

If it is determined that construction activities are the cause of dust, and that mitigation measures outlined in Section 5 of this DWP are not effective for controlling dust, the Link Alliance will implement the dust contingency procedures outlined in Section 5.6 of this DWP. If these measures fail to effectively manage dust to acceptable levels, works shall be halted until it can be determined why dust emissions are occurring and what additional mitigation measures are required to control ambient dust to acceptable levels.

The findings of the investigation will be recorded in the Air Quality Log (refer to Section 9.1 of this DWP).

6.3.3. Meteorological Monitoring A meteorological station that can continuously measure the following parameters would provide useful information to inform dust control at the site and investigation of dust incidents. If used within the works area, meteorological measurements should include: • • • • •

Continuous instrumental monitoring of wind direction, wind speed, rainfall, and temperature; Calculation of 1-hourly averaged data; Provision for alarms on 1-hour average wind speed data measured above wind speed trigger levels (visual and/or via internet, email and mobile phone); Remote display of real-time meteorological data (e.g. via the internet); and Recording/logging of monitoring data.

Where practicable weather instruments shall be located in general accordance with AS/NZS 3580.14:2014 - Methods for sampling and analysis of ambient air – Meteorological monitoring for ambient air quality monitoring applications. It will preferably be located to avoid adjacent buildings and other obstructions, where possible.

In the absence of on-site weather monitoring data, information of current and preceding wind conditions may be obtained from: • • •

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Weather observations from other CRL works areas (if available); Weather observations from other weather stations in Central Auckland (if available); Current wind observations are displayed by the Met Service at www.metservice.com.

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6.3.4. Wind Speed Trigger Dust Alerts The Trigger Levels proposed for wind speed measurements (if wind monitoring is employed at the site) are detailed in Table 6-3.

Table 6-3: Wind speed trigger levels

Discharge

Trigger Level

Wind speed

• Wind warning level: − 5 m/s (1-hour average) − 10 m/s (1-minute average occurring twice in 20 minute period)

In the event that wind speeds exceed the trigger values set out in Table 6-3 of this DWP, text alerts will be sent to nominated project personnel in the relevant work zone. As a minimum, the nominated personnel will include: • • • •

The Karangahape Station Project Manager; The Karangahape Station Construction Manager; The Environmental and Sustainability Manager; and The Karangahape Station Site Supervisor.

If 1-hour average wind speeds exceed 5 m/s then the visual monitoring of the work area will be undertaken to ensure that all appropriate mitigation outlined in this DWP is being implemented and are effective.

6.3.5. Alternative Management Approach There is the potential that continuous instrumental measurement of particulate concentrations may be influenced by either background particulate emission sources (not associated with the Karangahape Station main works or other CRL construction activities, such as from domestic home heating or motor vehicle emissions) or rainfall/high humidity conditions that can affect certain instruments.

Previous experience at other CRL construction sites has shown that comparison of continuously measured ambient particulate concentrations with defined trigger levels may not always be indicative of adverse dust effects or a potential for dust nuisance experienced beyond the site boundary.

If investigations of exceedance trigger levels establish that trigger events are not associated with onsite dust generation, an alternative dust risk assessment approach can be implemented. In that instance and if identified to be required by the Environmental and Sustainability Manager in consultation with the Auckland Council Monitoring and Compliance team, the following alternative approach will be taken: •

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A response to individual dust trigger alerts in accordance with Section 6.3.2 will not be mandatory and instrumental dust monitoring results will instead be reviewed against the trigger levels specified in by the Environmental and Sustainability Manager (or delegated person) on a daily basis.

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•

Visual dust inspections are to continue in accordance with Section 6.2. If identified by the Environmental and Sustainability Manager as a result of a review of instrumental dust monitoring results, visual inspections may be required at an increased frequency.

Dust risk is calculated each morning by site engineers in accordance with Section 5.1 and Appendix C and used to inform appropriate management procedures.

6.4 Monitoring Data All monitoring data from the dust monitors and the on-site meteorological station will be available to project staff on-line, and electronically recorded for future reference.

6.5 Monitoring Equipment Maintenance and Calibration The dust monitoring and meteorological equipment will require periodic maintenance and calibration checks. These will be done at a frequency and as per manufacture specifications by either site personnel, who have received appropriate training, or an Instrument Technician.

Unless the instrument recommends a higher frequency, at least quarterly maintenance and calibration will be carried out by a qualified Instrument Technician familiar with the equipment installed.

In the event that there is an equipment malfunction, or the equipment needs to be relocated for some reason, then the Instrument Technician will attend to this.

6.6 Odour Monitoring Odour monitoring (observations) will be undertaken when it is considered likely that odorous material may be encountered (such as contaminated soil materials) during excavations. The decision to undertake monitoring by a suitable experienced odour observer will be made by the Environmental and Sustainability Manager.

The frequency of odour monitoring will be dependent on the nature/scale of the source, location in relation to sensitive receptors, and meteorological conditions during exposure. Odour observations will occur: • •

When potentially contaminated material is excavated and loaded onto trucks; and When odour complaints have been received.

The Environmental and Sustainability Manager will ensure that at least one person in each work area is trained as an odour observer.

Monitoring will involve the odour observer being positioned downwind of the works and assessing odours on the intensity scale set out in Table 6-4. Where odours are identified as being “Distinct” and above, and the odour characteristic unpleasant, mitigation measures will be implemented. All observations will be recorded in the Air Quality Log (refer Section 9.1 of this DWP).

Table 6-4: Odour intensity scale

Intensity scale

Criteria

0

No odour

1

Very weak

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Intensity scale

Criteria

2

Weak

3

Distinct

4

String

5

Very string

6

Extremely strong

The odour observer will reassess the level of odour once the mitigation measures have been implemented. If the odours are still ‘Distinct’, further mitigation will be implemented, and / or the works halted until more conducive meteorological conditions are present, i.e. not blowing towards the sensitive receptor.

If it is suspected that sources upwind of the works are responsible for any odour, the odour observer shall make appropriate observations and document these also.

As exposed odorants may potentially also present health risks, the procedures outlined in Section 7.1 of the Contamination DWP for unexpected discovery of contamination should also be followed.

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7.

Communication and Complaints 7.1 Project Communications

Section 6 of the Communication and Consultation Plan (CCP) for the Karangahape main works details how communities in the vicinity of the construction works will be communicated with in relation to the management of adverse effects relating to air quality. Communications will focus around informing communities of dust management and monitoring measures to be implemented during the Project and providing updates on these aspects as appropriate during the construction works.

7.2 Complaints Although the mitigation measures described in this Air Quality DWP are aimed at avoiding discharges to air, complaints may be received by members of the public. It is important to ensure that any complaints are recorded and promptly investigated to identify and resolve the cause of the complaint. The requirements and procedures relating to complaints are detailed in Section 7.3.2 of the CCP.

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8.

Environmental Training 8.1 Project Staff

All project staff (contractors and subcontractors) will undergo general environmental awareness training and training about their responsibilities relating to this Air Quality DWP. Training requirements are described in full detail within the CEMP. Specific training requirements relating to this DWP are outlined in Table 8-1.

Table 8-1: Air Quality DWP specific training requirements

Training requirements

Frequency

Attendance

Introduction to the on-site monitoring equipment

As required and during new staff induction

Site Manager, Environmental and Sustainability Manager, delegated staff member and duty managers

Responding to continuous dust monitoring trigger alarm alerts

As required and during new staff induction

Site Manager, Environmental and Sustainability Manager, delegated staff member and duty managers

Responding to complaints regarding dust and air quality concerns

As required and during new staff induction

Site Manager, Environmental and Sustainability Manager, delegated staff member and duty managers

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9.

Record Keeping 9.1 Air Quality Log

Construction activities can be affected by a number of different external and internal factors, such as weather conditions or equipment malfunction, which can contribute to an increase in dust emissions. Various control and mitigation measures will be carried out on-site to prevent such effects, and monitoring and inspection procedures will be used to assess the level of dust emissions both on the project site and beyond its boundary. Recording relevant monitoring and inspection results, as well as the conditions of external and internal factors, can help assess if control measures are being effective, and to define appropriate corrective or preventive actions in case any undesirable effects are detected.

The procedures for recording daily air quality inspections are detailed below: • •

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The Site Engineer will fill out an Air Quality Daily Log (refer to Appendix F) form each day and maintain the record on site.

The following information will be recorded: o Records of dust monitoring trigger events specified by this DWP, including identification of the monitor ID which registered the trigger event, the time and the averaging period of the TSP trigger event (e.g. 1-hour or 24-hour average concentration); o Any dust control equipment malfunctions and any remedial action(s) taken; o Results of the Visual Inspections of dust emissions; o General weather conditions during the day (i.e. windy, calm, warm, rain, etc.); o The frequency of watercart and/or water sprinkling system use; and o The date and signature of the person entering the information.

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Appendix A: Record of Consultation A1

CLG Comments

A meeting of the Karangahape Station CLG was held on 12 November 2019 to discuss the Karangahape Main Works and for the CLG to provide comments / feedback on the CEMP and subplans, including this AQ DWP. Comments from the CLG following the meeting are recorded in Table F1 below.

Table F1: Response to CLG feedback.

Comment ID

Feedback received from

Feedback comment

Response

CLG 01

Kate Woodruffe, George Court Building, 2 Mercury Lane

Dust and fumes may require windows to be shut to avoid construction effects. Location of generators and other equipment that may push fumes into units - this has been an issue in the past.

The measures described in section 5.2 are proposed to avoid dust impacts at the George Court Building (and other properties adjacent to works areas). A dust monitor is currently located on the George Court Building to provide rapid feedback on dust levels before nuisance impacts occur.

Exhaust vents from generators, stationary engines and the underground ventilation system are required to be directed away from site boundary (and the George Court Building beyond.

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A2

IPR Comments

Comments received from the independent peer review (IPR) are recorded in the table below.

Independent Peer Review feedback.

Comment ID

Content

Feedback comment

Response

IPR 01

Section 2.2 and 5.2

It is noted in Table 2.1, that the construction support area will include the bentonite plant. Controls around this plant are considered good practice with the silos fitted and operated with a level alarm and pressure relief valves to prevent overfilling as well as the silos being operated with a filtration system.

However, as bentonite is likely to contain both crystalline silica and cristobalite, the dust from this source may not be considered “particulate not otherwise regulated” and care must be taken to ensure the controls are adequate. As the safety data sheet for the product to be used has not been sighted, it is not possible to identify the actual percentage of crystalline silica and cristobalite present. A conservative approach is required for any dust from this product.

The Bentonite supplier has not been confirmed but Bentonite likely to contain small amounts of respirable crystalline silica (RCS). The MSDS provided by construction team for example Bentonite material contained <1% w/w RCS, though other bentonite powder materials may have a higher content.

Bentonite storage/delivery method has subsequently been confirmed to be by bag and mixed manually within an enclosure. The absence of pneumatic conveyance to silos will reduce the potential for bentonite dust emissions and the risk of RCS emissions from this source beyond the site boundary is low. Sections 2.2 and 5.2 have been updated to reflect this method.

IPR-02

Section 5.5

It is noted that there has been communication with the Community Liaison Group. A concern was raised about “fume” from generators being an issue in the past. The plan deals with vehicle exhaust emissions and emissions from construction machinery in Section 5.5. However, if this neighbour reports that there have been issues from the location of generators in previous stages of this work, then the controls have not been followed or not been adequate. It is recommended that the location of plant is given particular attention and possibly added as a specific control in Section 5.5.

Small generators may be used temporarily at locations where mains electrical supply is not available.

Section 5.5 has been broadened to refer to and specify management actions for all engines used on-site (including those associated with generators and machinery as well as vehicles). Requirements now include siting and orientation of generators and other stationary engines to avoid discharges towards site boundaries as far as practicable.

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A3

Auckland Council Review Comments

Comments received from the Paul Crimmins, Senior Specialist at Auckland Council are recorded in the table below.

Auckland Council Review feedback.

Content

Feedback comment

Response

Section 5.2

Section 2.1 notes that the majority of dust sources are underground, including the use of a roadheader excavator with active or passive dust extraction. The application for resource consent R/REG/2016/1899 stated that dust from this process would be extracted to a fabric filter dust control system capable of meeting a 30 mg/m3 dust discharge limit prior to discharge. There is no reference of this in this draft AQ DWP, but details of such an emission control device (including location, design, monitoring and maintenance) would be a key requirement for the control of off-site dust effects. I suggest Table 5-2 needs further info about the dust extraction from underground working areas

Additional information added to Table 5-2.

Section 6.3

An indication of possible locations for instrumental monitoring to the north of K’Rd would assist the OPW sign-off process (at present, s6.3 suggests two locations shall be determined in future).

Locations are still yet to be confirmed but additional text added Section 6.3 to give more certainty to locations.

Section 6.3.3

Meteorological monitoring; this doesn’t specify that on-site wind monitoring shall occur. I consider that the dust monitor placed in the most open space near to the K’Rd works area should be accompanied by a Met monitor to provide the useful data detailed by s6.3.3 and comply with Designation Condition 59.3(a).

Information added to Section 6.3.3.

Page 39

| Karangahape Station Main Works

Air Quality Delivery Work Plan

Appendix B: ISCA Requirements Table A identifies the ISCA Credit Requirements relevant to this Air Quality DWP and where they are addressed in the document.

Table A: ISCA requirements

Credit

Requirement

Relevant section

Other relevant information/comments

DIS-4 Level 1

Measures to minimise adverse impacts to local air quality identified and implemented

Table 5-1 and Table 5-2

Also refer to Project Erosion and Sediment Control Plan

DIS-4 Level 1

Monitoring of air emission and/or quality is undertaken at appropriate intervals

Section 6

DIS-4 Level 1

Monitoring of air emission and/or quality is undertaken in response to complaints

Section 7.2

DIS-4 Level 3

Monitoring and Modelling demonstrates no exceedances of air emission or air quality goals

Section 6

Page 40

| Karangahape Station Main Works

Note dust trigger levels specified in Section 6.3.2 are not intended as air quality goals.

Also refer to Monitoring Results and Reports.

Air Quality Delivery Work Plan

Appendix C: Staging Drawings

Page 41

| Karangahape Station Main Works

ISO A1 594mm x 841mm

N

1: Q4 2019 - Q1 2020 (continuation from Early Works)

SITE ACESS

TRAFFIC MANAGEMENT: Road closure and parking closure signage erected (if not previously done during Early Works).

Traffic attenuator trucks temporarily diverting traffic.

Traffic barriers and cones setup behind safety of attenuator trucks.

Necessary line-marking conducted.

-

SITE ACESS SITE OFFICE

SITE

STO

RAG

E

MAIN SHAFT PLATFORM

SIT

EA

CES S

STORAGE AREAS

HOARDING INSTALLATION: Approx. 450m, combination of fixed and movable barriers, completing installation from Early Works.

Traffic attenuator trucks temporarily diverting traffic.

1.

2. Crane truck deliver and install fencing.

3. Drill/fix hoarding posts into ground/concrete blocks.

Traffic barriers installed on Mercury Lane.

4. Install plywood and banners for hoarding.

5. Road closure and parking closure signage repositioned accordingly.

Necessary line-marking conducted.

6.

SITE FACILITIES/CSA: Continue setup from Early Works.

Storage containers.

1.

2. Install supply conduits/pipes to shaft area for D-Wall construction within CSA. 3. Set up environmental controls.

4. Set up waste management area.

Water treatment and covered spoil areas.

5.

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00 FIRST_ISSUE REV

DESCRIPTION

CHP

-

CHECKED

DATE

APPROVED

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

TYPE

SHEET

CRL - KRD - CON - LKA - DRG - XXXX00

REVISION

A00

TN

ISO A1 594mm x 841mm

2: Q1 - Q2 2020

SITE ACESS

SITE ACESS SITE OFFICE

SITE

STO RAG E

MAIN SHAFT PLATFORM

4.

5.

6.

7.

8.

9.

10.

11.

ACE

BATCH PLANTS FOR D-WALLS

SIT E

1.

2.

3.

D-WALL CONSTRUCTION: Remove redundant services.

Set up batch plant for D-Wall construction.

Excavate guide wall perimeter, 600m3 muckaway 190m (L) x 2m (W) x 1.5m (D) Construct concrete guide walls, pour 150m3 concrete.

Mobilise Hydrofraise cutter, grab crane and service crane.

Excavate D-Walls in stages with bentonite/polymer installation.

Progressively muck away spoil, approx 3,100m3 total.

Progressively deliver reinforcement cages for D-Walls.

Pour concrete for D-Wall in stages, total 3,100m3.

Vacuum top of concrete to cut off level.

Demobilise Hydrofraise, grab crane and batch plant.

SS

D-WALL .

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX00 A00

ISO A1 594mm x 841mm

3: Q1 - Q3 2020

PARKING CLOSURE

SITE ACESS

SITE ACESS

E

SITE OFFICE

STO RAG

TEMP SHAFT

SITE

MAIN SHAFT PLATFORM

BATCH PLANTS FOR D-WALLS

EA

SITE ACESS

SIT

TEMPORARY SHAFT CONSTRUCTION: 17m diameter, 22m deep excavated shaft for mined tunnel access.

1. Install sheet-piles down to rock head.

2. Construct foundations and working platform.

3. Excavate temporary shaft down to rock level, muck away approx 2500m3 spoil.

4. Install ring beams progressively.

5. Break through rock down to required depth, cart out approx. 2000m3 rock.

6. Install rock bolts and shotcrete as necessary.

Construct noise shelter above excavated shaft 7. opening.

CES

S

SPOIL AREA

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00 FIRST_ISSUE REV

DESCRIPTION

CHP

-

CHECKED

DATE

APPROVED

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

TYPE

SHEET

CRL - KRD - CON - LKA - DRG - XXXX00

REVISION

A00

ISO A1 594mm x 841mm

4: Q2 - Q3 2020

SITE ACESS SITE ACESS SITE OFFICE

SITE

STO RAG

E

TEMP SHAFT

EXCAVATION AREA AND CONCRETE SLAB

SPOIL AREA

SIT EA CES S

STORAGE,ENVIROMENTAL BATCH PLANTS AND COVERED CONTROLS FOR D-WALLS SPOIL AREA

TEMPORARY PLUNGED-IN COLUMNS: Approximately 17no. steel columns 35m deep.

Drill bored pile with temp support casing as necessary to required depth.

Muck-away approx. 500m3 bored pile material.

Progressively deliver plunged column sections to site.

Weld together for full column length.

Install column into pile and pour concrete.

Backfill above concrete cut-off as required.

Repeat at all proposed column positions.

1.

2.

3.

4.

5.

6.

7.

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX00 A00

ISO A1 594mm x 841mm

5: Q3 2020

INDICATIVE OPENINGS IN GROUND LEVEL CONCRETE SLAB

SITE ACESS

SITE ACESS

SITE

STO

RAG

E

SITE OFFICE

SS

EXCAVATION AREA AND CONCRETE SLAB

SIT E

ACE

STORAGE,ENVIROMENTAL BATCH PLANTS CONTROLS AND COVERED FOR D-WALLS SPOIL AREA

L0 GROUND FLOOR SLAB CONSTRUCTION: Breakout concrete guide walls and clear rubble.

Excavate ground floor slab area approx. 45m (W) x 40m (L) x 1.1m (D) Muck away approx 1,800m3 spoil.

Progressively deliver reinforcement for slabs.

Construct 1000mm thick floor slab (underground station roof), approx. 1,600m3 concrete.

1.

2.

3.

4.

5.

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX00 A00

ISO A1 594mm x 841mm

L0 ML ENTRANCE SSL 58893

PARKING CLOSURE

6: Q4 2020 - Q2 2021

B1 ML SOUTH SSL 51643

B2 ML SOUTH SSL 45493

ML SOUTH DWALL TOE 43150

B3 ML SOUTH SSL 40442 B4 ML SOUTH SSL 39643 B5 ML SO UTH SSL

38367

B6 PLATFORM SSL 33643 B7 UNDER PLATFORM SSL 32243

SITE ACESS

SITE ACESS

SITE

STO R

AGE

SITE OFFICE

LEVEL 1 AND B2 CONSTRUCTION BELOW GROUND

SIT

EA

CES

S

STORAGE,ENVIROMENTAL BATCH PLANTS CONTROLS AND COVERED FOR D-WALLS SPOIL AREA

TOP DOWN CONSTRUCTION B1-B2 BELOW GROUND L0: 1. Level B1 excavate 8,700m3 spoil 2. Level B1 pour concrete 950m3 3. Level B2 excavate 7,400m3 spoil 4. Level B2 pour concrete 900m3 Part of B2 excavation may be through rock 5. Crawler crane extract skips with spoil to ground level.

6. Tipper trucks move spoil to site stock pile or muck away off site.

7. Progressively deliver steel reinforcement and concrete.

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX00 A00

ISO A1 594mm x 841mm

7: Q1 2021- Q2 2022

PARKING CLOSURE

B5 ML SO UTH SSL

38367

B6 PLATFORM SSL 33643 B7 UNDER PLATFORM SSL 32243

SITE ACESS SITE ACESS

SITE

STO

RAG

E

SITE OFFICE

LEVEL B4,B6,B7 CONSTRUCTION BELOW GROUND

BOTTOM UP CONSTRUCTION B4, B6, B7: Level B4: rock break and excavate 6,400m3. Shotcrete and rock bolt as required.

Level B6: rock break and excavate 5,300m3. Shotcrete and rock bolt as required.

Level B7: rock break and excavate 2,500m3. Shotcrete and rock bolt as required Install drainage system level B7.

Level B7: Construct concrete floor slab 1,400m3.

Construct walls 700m3.

Install temporary steel props to support construction of Level B4 slab.

Level B4: Construct concrete floor slab 800m3, construct walls 550m3.

2.

3.

4.

5.

6.

7.

CES

S

STORAGE,ENVIROMENTAL BATCH PLANTS AND COVERED CONTROLS FOR D-WALLS SPOIL AREA

SIT EA

1.

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX00 A00

ISO A1 594mm x 841mm

8: Q1 2021 - Q3 2022

SITE ACESS

SITE ACESS

SITE

STO

RAG

E

SITE OFFICE

MECHANICAL, ELECTRICAL, FIRE & HYDRAULIC (MEFH): 1.

Deliver MEFH equipment to site above ground, including: Escalators Elevators Tunnel Ventilation Bathrooms Pipes/ducts Cables, fixtures, tiles, etc 2. Unload MEFH from semi trailers into site.

Lower MEFH equipment into station levels via openings and in3. stall

SIT EA

CES

S

STORAGE,ENVIROMENTAL CONTROLS AND COVERED SPOIL AREA

GENERAL LAYOUT NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

MERCURY LANE SITE OUTLINE

PARKING CLOSURES DESIGNATION BOUNDRY COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED

PROJECT:

MDS DRAWN

-

TITLE:

HCO A00FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

CITY RAIL LINK KARANGAHAPE_STATION

ZONE:

MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX00 A00

ISO A1 594mm x 841mm

N

Q2 2020 - Q4 2023

MINED TUNNEL BERESFORD SQUARE SHAFT

MINED TUNNEL

TEMP SHAFT MERCURY LANE SHAFT

NOISE ENCLOSURE

SPOIL AREA

MINED TUNNEL CONSTRUCTION: Works beneath noise shelter at Temporary Shaft. Gantry crane used to lift in/out plant, equipment and materials.

Large excavator to commence cross adit.

1.

2. Road-header mines cross adits and platform tunnels.

3. Rock anchors and shotcrete progressively installed.

4. Excavators and loaders collect excavated material.

5. Dumper trucks cart material to base of Temp shaft.

6. Gantry crane extracts skips with excavated material to ground level.

7. Excavators/Loaders load material to tipper/dump trucks.

8. Dump trucks muck away from noise shelter to designated site stock pile or cart off site.

9. Permanent concrete lining constructed.

10. 10. Fit out including precast / insitu concrete platforms GENERAL LAYOUT

NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

KROAD STATION SITE OUTLINE DESIGNATION BOUNDARY PARKING CLOSURES COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED -

TITLE:

HCO A00 FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

KARANGAHAPE_STATION

ZONE:

MDS DRAWN

CITY RAIL LINK

PROJECT:

BERESFORD_SQUARE_&_MERCURY_LANE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX00 A00

ISO A1 594mm x 841mm

PARKING CLOSURE

1: Q1 - Q2 2020 BUS S TOP R

N

SITE FACILITIES/CSA: Continue setup from Early Works.

Storage containers.

1.

2. Install Retaining walls 3. Supply conduits/pipes to shaft for D-Wall construction.

Excavate trench 50m (L) x 2m (W) x 1m (D) in road reserve (100m3), install pipes and backfill. Pedestrian access and private parking shall be maintained.

4. Set up environmental controls.

5. Set up waste management area.

Water treatment and covered spoil areas.

6.

EMOVE D

PRIVATE ACCESS MAINTAINED

MAIN SHAFT PLATFORM

HOARDING/BARRIERS RETAINING WALL

STORAGE AREA

S ES AC E SIT 50m (L) x 2m (W) x 1m (D) TRENCH FOR D-WALL PIPES/CONDUITS SITE OFFICES, WELFARE FACILITIES AND SERVICE SET-UP DURING EARLY WORKS

ROAD CLOSED

RO -

n

ve ro ED s or te p OS icle priva CL o veh ss to ed

-

IT EX

AD

ac

ce tain in ma

E SIT

ng rki pa s le rtie hic pe

PARKING CLOSURE

GENERAL LAYOUT

NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

BERESFORD SQUARE SITE OUTLINE

DESIGNATION BOUNDARY PARKING CLOSURES COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

TRAFFIC MANAGEMENT: Majority conducted during Early Works Traffic attenuator trucks temporarily diverting traffic.

Traffic barriers and cones setup behind safety of attenuator trucks.

Road closure and parking closure signage erected.

Necessary line-marking conducted.

Bus stops removed on Pitt Street.

HOARDING INSTALLATION: Approx. 600m, combination of fixed and movable barriers.

Traffic attenuator trucks temporarily diverting traffic.

1.

2. Crane truck deliver and install fencing.

3. Drill/fix hoarding posts into ground/concrete blocks.

4. Install plywood and banners for hoarding.

5. Road closure and parking closure signage repositioned accordingly.

6. Necessary line-marking conducted.

STATUS APPROVED -

TITLE:

HCO A00 FIRST_ISSUE REV

DESCRIPTION

CHP

-

CHECKED

DATE

APPROVED

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

KARANGAHAPE_STATION

ZONE:

MDS DRAWN

CITY RAIL LINK

PROJECT:

BERESFORD_SQUARE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

TYPE

SHEET

CRL - KRD - CON - LKA - DRG - XXXX01

REVISION

A00

ISO A1 594mm x 841mm

2: Q2 - Q4 2020

MAIN SHAFT PLATFORM PERIMETER GUIDE WALL

DIAPHRAGM WALL

D-WALL CONSTRUCTION: D-walls constructed in stages together with hoarding re-positioning to maintain vehicle access to private properties, trafficable plates may be used in conjunction Remove redundant services.

1.

2. Set up batch plant for D-Wall construction.

3. Excavate shaft perimeter, 600m3 muckaway approx. 200m (L) x 2m (W) x 1.5m (D) 4. Construct concrete guide walls, pour 200m3 concrete.

5. Mobilise Hydrofraise cutter, grab crane and service crane.

6. Excavate D-Walls in stages with bentonite/polymer installation.

7. Progressively muck away spoil with staged stockpiling at CSA, approx 4,000m3 total.

8. Progressively deliver reinforcement cages for D-Walls.

9. Pour concrete for D-Wall in stages, total 4,000m3.

10. Vacuum top of concrete to cut off level.

11. Demobilise Hydrofraise and grab crane.

SILOS

STORAGE

DESANDER PLANT

E SIT

SITE OFFICES, WELFARE FACILITIES AND SERVICE SET-UP DURING EARLY WORKS

ES AC

S

ROAD CLOSED

AD RO -

SS

ng rki pa s le rtie hic pe ve ro ED s or te p OS icle priva CL veh to no cess ined ac inta ma

-

CE

EA SIT

GENERAL LAYOUT

NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

BERESFORD SQUARE SITE OUTLINE DESIGNATION BOUNDARY PARKING CLOSURES COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED -

TITLE:

HCO A00 FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

KARANGAHAPE_STATION

ZONE:

MDS DRAWN

CITY RAIL LINK

PROJECT:

BERESFORD_SQUARE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX02 A00

ISO A1 594mm x 841mm

3: Q4 2020 - Q1 2021

INDICATIVE FLOOR SLAB OPENINGS FOR CONSTRUCTION ACCESS

GROUND LEVEL EXCAVATION AND L0 CONCRETE SLAB

STORAGE AREA

SS

CE

EA SIT

L0 GROUND FLOOR SLAB CONSTRUCTION: Breakout concrete guide walls and clear rubble.

1.

2. Excavate proposed shaft ground floor/roof slab area 20m (W) x 90m (L) x 1.5m (D) 3. Combined muckaway and/or stockpile at CSA 1,600m3.

4. Progressively deliver reinforcement for slabs.

5. Construct reinforced concrete floor slab (station roof), approx 1,500m3 concrete.

Sections of concrete slab shall be constructed in stages to maintain vehicle access to private parking. Trafficable plates may also be utilised as crossings.

STORAGE AREA

SITE OFFICES, WELFARE FACILITIES AND SERVICE SET-UP DURING EARLY WORKS

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GENERAL LAYOUT

NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

BERESFORD SQUARE SITE OUTLINE DESIGNATION BOUNDARY PARKING CLOSURES COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED -

TITLE:

HCO A00FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

KARANGAHAPE_STATION

ZONE:

MDS DRAWN

CITY RAIL LINK

PROJECT:

BERESFORD_SQUARE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX03 A00

ISO A1 594mm x 841mm

4: Q1 2021 - Q4 2021 nG

nF

nE

nD

nC

nB

nA

L1 BS ROOF SSL 70693

L0 BS ENTRANCE SSL 64593

B1 BS NORTH SSL 58643

B2 BS NORTH SSL 53643

◄ WEST

EAST ►

INDICATIVE FLOOR SLAB OPENINGS FOR CONSTRUCTION ACCESS

B3 BS NORTH SSL 48643

B4 BS NORTH SSL 43643

T AS

B5 BS NORTH SSL 38643

B6 PLATFORM SSL 33643 B7 UNDER PLATFORM SSL 32243

◄

T ES W

►

E

L0 CONCRETE SLAB

EA SIT

S CE

TOP DOWN CONSTRUCTION BELOW L0: EAST section levels B1 & B2. WEST section levels B1, B2, B3 & B4.

Position hoarding into required locations for remainder of Top-Down construction 1. phase.

2. Maintain necessary traffic management to allow access for vehicles to private property parking.

3. Excavate and top-down construct station slabs below L0 4. Level B1 EAST & WEST: excavate 8,000m3, pour concrete 900m3 5. Level B2 EAST & WEST: excavate 8,000m3, pour concrete 1,300m3 Part of Level B3 and B4 excavation may be through rock.

6. Level B3 EAST: rock break and excavate 3,800m3, pour concrete 600m3 7. Level B4 EAST: rock break and excavate 3,000m3, pour concrete 480m3 8. Crane extracts skips with spoil to ground level.

9. Tipper trucks move spoil to site stock pile or muck away off site.

10. Multiple deliveries of steel and concrete.

S

ROAD CLOSED

AD RO ng rki pa s le rtie hic pe ve ro ED s or te p OS hicle priva ve to no cess ined ac inta ma

CL

S

-

S CE EA T I S

GENERAL LAYOUT

NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

BERESFORD SQUARE SITE OUTLINE DESIGNATION BOUNDARY PARKING CLOSURES COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED -

TITLE:

HCO A00 FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

KARANGAHAPE_STATION

ZONE:

MDS DRAWN

CITY RAIL LINK

PROJECT:

BERESFORD_SQUARE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX04 A00

ISO A1 594mm x 841mm

5: Q4 2021 - Q4 2022 nG

nF

nE

nD

nC

nB

nA

L1 BS ROOF SSL 70693

L0 BS ENTRANCE SSL 64593

B1 BS NORTH SSL 58643

B2 BS NORTH SSL 53643

◄ WEST

EAST ►

INDICATIVE FLOOR SLAB OPENINGS FOR CONSTRUCTION ACCESS

B3 BS NORTH SSL 48643

B4 BS NORTH SSL 43643

B5 BS NORTH SSL 38643

ST

B6 PLATFORM SSL 33643 B7 UNDER PLATFORM SSL 32243

T ES

►

EA

W

◄

L0 CONCRETE SLAB

SS CE

EA SIT

ROAD CLOSED

ng rki pa s le rtie hic pe ve ro ED s or te p OS hicle priva ve to no cess ined ac inta ma

CL

-

S CE

AD RO -

S

EA SIT

GENERAL LAYOUT

NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

BERESFORD SQUARE SITE OUTLINE DESIGNATION BOUNDARY PARKING CLOSURES COMPANY NUMBER : 6267870 10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

0

BOTTOM UP CONSTRUCTION: EAST section levels B5, B6 & B7. WEST section level B3.

1. Level B5 EAST: rock break and excavate 2,500m3. Shotcrete and rock bolt as required.

2. Level B6 EAST: rock break and excavate 2,500m3. Shotcrete and rock bolt as required.

3. Level B7 EAST: rock break and excavate 1,000m3. Shotcrete and rock bolt as required.

4. Install drainage system and structures at Level B7.

5. Level B3 WEST: rock break and excavate 5,400m3, pour concrete slab 700m3, construct walls 450m3.

6. Level B7 EAST: Construct concrete slab 400m3, construct walls 350m3.

7. Install temporary steel props to support construction of B5 East.

8. Level B5 EAST: Construct concrete slab 400m3, construct walls 270m3.

9. Level B6 EAST: Construct station platform (in-situ and precast concrete) approx. 200m3.

STATUS APPROVED -

TITLE:

HCO A00 FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

KARANGAHAPE_STATION

ZONE:

MDS DRAWN

CITY RAIL LINK

PROJECT:

BERESFORD_SQUARE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX05 A00

ISO A1 594mm x 841mm

6: Q2 2021 - Q1 2023

INDICATIVE FLOOR SLAB OPENINGS FOR CONSTRUCTION ACCESS

T AS

T ES

◄

►

E

W

L0 CONCRETE SLAB

SS

CE

EA SIT

MECHANICAL, ELECTRICAL, FIRE & HYDRAULIC (MEFH): 1.

Deliver MEFH equipment to site above ground, including: Escalators Elevators Tunnel Ventilation Bathrooms Pipes/ducts Cables, fixtures, tiles, etc 2. Unload MEFH from semi trailers into site.

ROAD CLOSED

AD RO ng rki pa s le rtie hic pe ve ro ED s or te p OS icle priva CL veh to no cess ined ac inta ma

-

SS

CE

EA SIT

GENERAL LAYOUT

NTS

Link Alliance has prepared this document for the sole use of the client and for a specific purpose, each as expressly stated in the document. No other third party should rely on this document without the written consent of Link Alliance. Link Alliance undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document.

BERESFORD SQUARE SITE OUTLINE DESIGNATION BOUNDARY PARKING CLOSURES COMPANY NUMBER : 6267870 0

10

20

30

40

50

60

CREATOR ID : 70

80

90

100mm

SCALE

SIZE

AS SHOWN

A1

DESIGNED REVISIONS

CLIENT:

STATUS APPROVED -

TITLE:

HCO A00 FIRST_ISSUE REV

CHP DESCRIPTION

APPROVED

-

CHECKED

DATE

DATE

JH

_

This drawing is confidential and shall only be used for the purpose of this project. The signing of this title block confirms the design and drafting of this project have been prepared and checked in accordance with the Link Alliance quality assurance system to ISO 9001-2000.

KARANGAHAPE_STATION

ZONE:

MDS DRAWN

CITY RAIL LINK

PROJECT:

BERESFORD_SQUARE CONSTRUCTION_SITE_LAYOUT PLAN_VIEW PROJECT

DOCUMENT:

ZONE

DISCIPLINE

ORGANISTION

CRL - KRD - CON - LKA

TYPE

SHEET

REVISION

- DRG - XXXX06 A00

Air Quality Delivery Work Plan

Appendix D: Dust Risk Assessment Procedure The risk of adverse off-site dust impacts as a result of the main works and the level of dust mitigation and management processes required to minimise such impacts will vary depending on various factors including: â&#x20AC;˘ â&#x20AC;˘ â&#x20AC;˘

Proximity of activity to sensitive locations in the surrounding environment; Weather conditions such as wind speed and whether the ground is dry; and The dust emission potential associated with the type of activity being undertaken.

The objective of this dust risk assessment (DRA) procedure is to provide guidance to the Environmental and Sustainability Manager, and site supervisors of the level of dust management procedures that should be implemented depending on what activity is being undertaken on site. The DRA procedure is based on those implemented by London Council and is outlined in Figure C-1 below5,6.

Step 1 Calculate environmental dust potential from local weather conditions and proximity of sensitive receptors (Table C-1).

Step 2 Calculate dust risk for each activity to be undertaken (Table C-2).

Step 3 Ensure the appropriate level of dust management processes are implemented (Section 5.2), and that the dust risk is displayed on-site.

Figure C-1 Graphical representation of process to determine dust risk

Treatment of above and below ground activities A substantial proportion of dust generating activities in the Main Works phase will occur underground (either below the existing ground surface or underneath previously constructed floor slabs). Dust from underground activities will be contained and will not be influenced by external weather conditions. Any residual dust in air ventilated from underground works areas will be discharged via fixed vent locations.

Conversely, dust from most above ground activities associated with the works will not be physically contained and will be discharged diffusely, potentially from a wide variety of locations. Above ground activities will also be subject to ambient weather conditions.

The environmental influences on the potential for above and below ground activities to cause dust nuisance therefore differ and environmental dust potential of above and below ground activities is therefore calculated via separate activities below.

5

The Control of Dust and Emissions during Construction and Demolition. Greater London Authority, July 2014.

Guidance on the assessment of dust from demolition and construction, Version 1.1, Institute of Air Quality Management (UK), February 2014.

Page 42 | Karangahape Station Main Works 6

Air Quality Delivery Work Plan Calculating environmental dust potential for above ground activities The calculation of environmental dust sensitivity (and potential fort dust transport) for ground level activities requires identification of the following: 1. Identify location of nearest residential activity to the works activities to be undertaken and identify approximate separation distance for each works activity.

2. Review local weather forecast over works period for wind speeds (e.g. via https://www.metservice.com/towns-cities/auckland/auckland-central) and on-site meteorological data for rainfall in preceding 48 hours.

With this information the environmental dust sensitivity rating can be calculated from Table D-1 below.

Table D-1 Environmental potential calculation for ground level activities Meteorological influences Environmental dust sensitivity

Receptor sensitivity

Residential receptor within 100 m of activity Residential receptor within 200 m OR other activities within 100 m of activity All other scenarios

Predicted 1-hourly average wind speeds >5 m/s AND <1 mm of rain in the preceding 48 hours

Predicted 1-hourly average wind speeds >5 m/s OR <1 mm of rain in the preceding 48 hours

Predicted 1-hourly average wind speeds <5 m/s AND >1 mm of rain in the preceding 48 hours

High

Medium

Medium

Medium

Medium

Low

Low

Low

Negligible

Calculating environmental dust potential for below ground activities Environmental dust sensitivity and potential fort dust transport associated with below ground works is considered differently as dust generation from these activities will not be influenced by ambient weather conditions and dust will only be emitted from fixed discharge points in the ventilation system.

The environmental dust potential for underground dust generating activities is therefore calculated based on the state of discharge from ventilation exhaust points as follows: • •

LOW – Exhaust free of visible dust emissions; and MEDIUM – Visible dust emissions are observed from external exhaust vents.

Contingency measures for ventilation equipment malfunction is discussed in Section 5.2.2.

Page 43

| Karangahape Station Main Works

Air Quality Delivery Work Plan Dust risk calculation The dust risk for each prescribed activity associated with the works is subsequently derived from the dust emission potential and the calculated environmental dust potential as outlined in Table C-2.

Table C-2 Dust risk calculation

Calculated environmental dust potential Overall dust risk of activity

High

Medium

Low

High

High

Medium

High

Medium

Low

High

Medium

Low

High

Medium

Low

Piling

Medium

Medium

Low

Outdoor stockpiling

Medium

Medium

Low

Ground stabilisation

Medium

Low

Low

Construction

Medium

Low

Low

Indoor stockpiling

Low

Low

Negligible

Vehicle movements over paved surfaces

Low

Low

Negligible

N/A

Medium

Low

N/A

Medium

Low

N/A

Medium

Low

Medium

Low

Below ground activity*

Above ground activity*

Rock drilling in exposed areas Earthworks in exposed areas Vehicle movements over unpaved surfaces Handling bentonite powder

Vehicle movements over unpaved surfaces Excavation, mining and construction Rock drilling

Underground construction N/A ventilation * Each activity has a different dust emission potential

The calculated dust risk should be displayed on-site to ensure site staff implement the appropriate level of dust management procedures as specified in Section 5.2. The dust management procedures for each activitiesâ&#x20AC;&#x2122; risk level is described in Appendix D.

Page 44

| Karangahape Station Main Works

Air Quality Delivery Work Plan

Appendix E: Dust Risk Controls Sheet To be completed by the construction manager or others involved in the implementation of controls based on the requirements of section 5.2.

Page 45

| Karangahape Station Main Works

Air Quality Delivery Work Plan

Appendix F: Air Quality Log Sheet

Page 46

| Karangahape Station Main Works

DAILY LOG FORM Date:___/___/_____  Mon  Tue  Wed  Thu  Fri Sat  Sun

VISIBLE DUST EMISSIONS Source

Level*

Colour/Opacity

Time

Weather Cond.

Wind Speed / Wind Direction

(i.e. rain, windy, calm)

(e.g. “7 m/s / NE”)

_______________

____

___________

___:____

____________

__________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

_______________

____

___________

___:____

____________

_________/_________

*Levels (extent) of visible dust emissions: (1) Minor visible emissions (<5m from source); (2) Moderate visible emissions (<30m from source); (3) Major visible emissions (>30m from source).

INVESTIGATION AND RESPONSE Date event was investigated:___/___/_____ Person responsible for investigation and response:________________________________ Possible cause(s):

Corrective actions:

 Dust from wind erosion of exposed ground

Date:

Description:

 Watercart not used properly

___/___/_____

___________________________________________

 Exceedance of speed limit in unpaved surface

___/___/_____

___________________________________________

 Materials not handled or stored properly

___/___/_____

___________________________________________

 Loading/Unloading not carried out properly  Other_________________________________________ ________________________________________________ ________________________________________________ ________________________________________________

Preventive actions: Date:

Description:

___/___/_____

___________________________________________

___/___/_____

___________________________________________

___/___/_____

___________________________________________

________________________________________________

VEHICLES AND MACHINERY – PRESTART CHECK Equipment identification

Excessive or prolonged visible emissions observed?

If yes, describe action taken (e.g., equipment repaired or removed from site within 24 hours):

___________________

________________________

_________________________________________________________

___________________

________________________

_________________________________________________________

___________________

________________________

_________________________________________________________

Person responsible for the above information: Name:______________________ Job Title:_________________________ Signature:______________________ Date:___/___/_____