waterview connection project (ca3466) · 2015-06-29 · monitoring results are shown in table 2....

Waterview Connection Project (CA3466):

Auckland Council Monthly Environmental Report Report 39 – Period May 2015

Document 025-RPT-03750

22 June 2015

May 2015 Environmental Report

AC Monthly Report May 15.docx 15 June 2015

Contents

1. Introduction .................................................................................................................................................. 3

2. Resource Consents ........................................................................................................................................ 3

3. Construction Works – May until August 2015 .............................................................................................. 3

4. Site Meetings and Inspections ...................................................................................................................... 4

5. Environmental Monitoring............................................................................................................................ 4

5.1. Tree Management ................................................................................................................................ 4

5.2. Noise and Vibration Monitoring ........................................................................................................... 6

5.3. Air Quality Monitoring .......................................................................................................................... 6

5.4. Ground Water Monitoring .................................................................................................................... 7

5.5. Settlement Monitoring ......................................................................................................................... 8

5.6. Water Quality and Ecological Monitoring ........................................................................................... 11

5.6.1. Water Quality .............................................................................................................................. 13

5.6.2. Ecological Monitoring & Management ....................................................................................... 16

5.7. Contaminated Soil Monitoring ............................................................................................................ 17

5.7.1. Site monitoring............................................................................................................................ 17

5.7.1. Soil disposal ................................................................................................................................. 17

5.7.2. Phyllis Reserve landfill monitoring .............................................................................................. 18

5.8. Erosion and Sediment Control Monitoring ......................................................................................... 23

5.9. Archaeological monitoring .................................................................................................................. 23

5.10. Waste Management ....................................................................................................................... 23

5.11. Hazardous Substance Management ............................................................................................... 24

6. Stakeholder Management .......................................................................................................................... 24

6.1. Stakeholders – local liaison activity .................................................................................................... 24

6.2. General Communications Activity: Overview ..................................................................................... 25

6.3. Queries, Concerns and Complaints ..................................................................................................... 26

Appendix A .......................................................................................................................................................... 28



1. Introduction

To meet reporting requirements for the Waterview Connection, a monthly report will be prepared and sent

to AC in the 2nd week of the following month.

This report sets out the reporting requirements for the Waterview Connection for the period May 2015.

2. Resource Consents

With the exception of Consents ARC:38325, 38326, 38327 and 38328 which relate to rock crushing and

concrete batching plant activities, all other remaining consents have been triggered by works to date.

Appendix A provides a table of all the additional resource consents obtained for the project to date.

Resource consents (R/LUC/2015/1361 (landuse) and R/REG/1321 (coastal permit) were granted on 7 May

2015 for the construction and operation of a Boardwalk at Eric Armishaw Reserve. Resource consent was

also granted on 29 2015 May for the earthworks associated with the demobilising of the pre-cast yard out at

East Tamaki.

3. Construction Works – April until July 2015

The table below details the construction works carried out in May, as well as an indicative programme which

shows the anticipated works in the coming 3 months until 31th of August 2015.

South Work Package May June July Aug

Dominion to Maioro St Earthworks, drainage, service relocations, ground improvement & structures

Maioro St to Richardson Rd

Construct cycleway (including earthworks and service installation)

Cut batter at Maioro off ramp

Construct Richardson Road Bridge Pedestrian stairway (inc piling)

Richardson Rd to cut in (SAT) Hendon Footbridge ( Ramps and foundations)

Valonia Street civil works (inc skatepark and Valonia Carpark and ablutions)

Oakley Creek Pedestrian Bridge #2

SAT cut to CY9 (inc Tunnel Civils)

TBM excavation

Load out spoil to Wiri

Tunnel Backfill/Drainage

Cross passage construction and excavation



North Work Package May June July Aug

Northern Approach Trench (NAT) & surrounds

NAT infill columns, beams and road deck.

Footpath construction & landscaping 23 - 33 Waterbank Cres

Waterbank Reserve – Landscape Park Areas/ Playground

Howlett Reserve Walkway

Northern Fill, Oakley Inlet (the Bog) & Ramp Construction

Beam Placement – Ramp 4

Oakley Creek Footbridge – investigation works/ site establishment

North abutment of Heritage Footbridge

Great North Rd Interchange

Cleaver –footpath and pavement construction. Landscaping.

Boomerang - Gas relocation works

Ramp 2 western abutment (median works) – piling & retaining wall

Carrington Rd Interchange

Retaining Wall 601 - Panel placement

Retaining Wall 603 – West Carrington Rd – Soil nails, bench and shotcrete

Retaining Wall 603 – East of Carrington Rd – Soil nails and piling

Retaining Wall 603 – Demolition of old wall

Retaining Wall 603 - Panel placement

4. Site Meetings and Inspections

Auckland Council Erosion and Sediment Control officers visited the Northern Area on the 28th May, which

resulted in an inspection score of 1. No Council Erosion and Sediment Control inspections were undertaken

in the South during May.

5. Environmental Monitoring

5.1. Tree Management

Grant Sirl, Arborist – Arbor Advice Ltd (the Project Arborist) assessed the site in May. His report is included

below:



Table 1 – Amenity Trees

Amenity Tree

Species Location Health Fencing Observations/recommended actions

South

522 Zelkova Within compound area adjacent north side Richardson Rd

Good. Good

No actions required.

698 Group various native species

Alan Wood Reserve, access via Methuen Rd

Good/ fair Sound barrier wall excludes grove of vegetation from work site.


Group Lemonwood/ Titoki

Barrymore Rd Fair Located within road reserve


Group. Kowhai, Karamu, tree fern & various native & exotic species.

Southwestern side of Allan Wood Reserve

Good Good. No actions required.

Group #'s 512, 513 to 516 and 519

Titoki, Prunus, Totara, Tarata, Karaka & Cabbage

Near western apex of Allan Wood Reserve, outside designation area.

Good / fair.

Good. No actions required.

North

N/A Pohutukawa Waterview Primary School, (outside designation).

Good Sound wall separates tree from site.


Status quo. Overall vitality of

tree reasonably good. Deadwood

becoming more prevalent in

northern aspect of crown.

Epicormic growth established

upon reduced stems and

throughout crown.

# 811 Titoki (x2) Herdman Street - street trees

Good/ Fair

Trees excluded from construction by sound wall


# 247 Pohutukawa Waterview Reserve

Fair Tree relocated to reserve


Various Waterview Reserve

Majority good

All remaining trees within reserve ring fenced.


Development of reserve currently being undertaken.

#272 Totara Robinia Karaka Karaka

Star Mill site - archaeological area

Good/Fair Trees in archaeological area have been fenced off from construction

Actions required.

Extensive regrowth from Robinia

cut stumps establishing.



Amenity Tree

Species Location Health Fencing Observations/recommended

actions

#'s 804, 805, 806, 807,

808 & 809.

Kowhai, Silver Birch, Kawaka, Kahikatea, Bottlebrush. Lancewood & Cabbage Tree

23-25 Waterbank Crescent

Majority Good.

No actions Required.

Noted foliage decline prevalent over crown of Kawaka.

#790 Pine Group Oakley Creek Inlet Good Located on inlet embankment


Status quo.

#326 Cypress Located next to SRP14 beside a small Norfolk Island pine.

N/A N/A Action required.

Subject tree in an advanced state of decline.

(Clearance to be carried out in conjunction with pond works in area in 2016)

5.2. Noise and Vibration Monitoring

Noise monitoring has been undertaken for new plant and activities since commencement of construction in

January 2012 to assess levels against noise predictions (as per the Construction Noise and Vibration

Management Plan) and confirm compliance with the project noise criteria, specifically as relates to Consent

conditions CNV.2 for noise, CNV.3 for noise from air blast and CNV.4 and CNV.5 for vibration.

The focus for noise and vibration during May has been assessment of extended works required outside

normal working hours (07.30 – 18.00hrs Monday to Saturdays), submission of Site Specific Noise

Management Plans (SSNMPs) to Council and noise monitoring of ramp construction and tunnel operations.

Monitoring results are shown in Table 2.

Mitigation has been installed on the pumps and the cooling fan at Construction Yard 9 which were identified

as the main noise sources during initial monitoring at 96 Methuen Road in April. The monitoring 28 May 2015

indicates that following mitigation, noise levels are marginally above night-time noise criteria. A SSNMP has

been submitted to Council for operation of the cooling fan at Construction Yard 9. Monitoring was also

undertaken at 188 Methuen Road following installation of cladding around the conveyor belt storage. This

indicated that noise levels are still being measured above night-time noise criteria. Additional noise

mitigation is being investigated for conveyor operation in the vicinity of the segment yard and a SSNMP will

be submitted to Council.



Table 2 - Measured Noise Levels

SSNMP Date/time Measurement location

Activity Noise level LAeq15min (dB)

Noise level LAMax (dB)

SSNMP# 61 Rev6

06/05/15 1.05am

End of Maryland Street, GNRI

Pouring barriers at ramp 3 50.3 64.6

Project noise criteria Northern area applicable if operating outside normal working hours (20.00 -07.30 ) (Apply at residential property)

60 75

n/a 07/05/15 8pm – 6am 96 Methuen Road,

1m from facade Construction yard CY9 operation (fan noise)

40-51 65

28/05/15 10pm-5am

46 -48 69

20/05/15 10pm – 5am

188 Methuen Road, first floor balcony

Tunnel operations (conveyor), segment yard

43-53 70

Project noise criteria Southern area applicable if operating outside normal working hours (20.00 -07.30 ) (Apply at residential property)

45 75

The SSNMPs submitted and approved in May 2015 pursuant to consent condition CNV13 are listed below.

Table 3 – SSNMPs submitted and approved for May

SSNMP Ref Date of Works

Night Works or Day Works

Location of Works

Description of Works

Works start time

Works end time

Date SSNMP

Submitted to Council

Date SSNMP Approved by

Council

Monitoring specified in

SSNMP

SSNMP# 52 Rev8

10/05/15-24/05/15

Night SH20 SB

Maioro on-ramp

SH20 traffic management

works 10pm 5am 4/05/15 6/05/15 No

SSNMP# 72

29/05/15 -31/10/15

Night Construction

yard 9, Southern Area

Cooling fan operation

7am 7am 29/05/15 04/06/15 Yes

SSNMP# 73

10/06/15 Night

Hendon footbridge

northern arch pad

Early morning concrete pour

3am 7.30am 29/05/15 04/06/15 No

5.3. Air Quality Monitoring

Two Total Suspended Particulate (TSP) analysers and one met mast are required in the Southern Area

(Sector 9) and one TSP analyser with met mast is required in the Northern Portal Area (sector 7) under

consent conditions AQ16 and AQ17.

On 22 December 2014 one of the analysers in the Southern Area was removed from service on agreement

with Auckland Council.

The Southern Area E-BAM is located nearby the Southern Approach Trench (EBAM2). The Northern Portal

area E-BAM is located outside the Waterview School grounds (EBAM3).

E-BAM results for May show levels below the project limits for TSP at all monitoring sites with the following

exceptions:

Southern Area (EBAM 2):

No exceedences were recorded of the hourly average TSP trigger level of 200 µg/m3 at EBAM2.

No exceedences were recorded of the daily average TSP trigger level of 80 µg/m3 at EBAM2.



A beta count failure occurred on 28 May 2015 at 9:00 p.m. and was repaired on 29 May 2015 at

11:45 a.m. The fault later re-occurred on 29 May 2015 at 8:30 p.m. and was repaired on 30 May

2015 at 1:45 p.m.

A temperature sensor fault occurred on 30 May 2015 at 4:30 p.m. The fault was detected on 31

May 2015 however due to persistent rain, could not be attended to until 01 June 2015 at 9:45 a.m.

when the sensor was replaced.

Northern Area (EBAM 3):

One exceedence was recorded of the hourly average TSP trigger level of 200 µg/m3 at EBAM3. The

exceedance was measured on 28 May 2015 between 11:00 p.m. and 12:00 a.m. with a maximum

concentration of 233 µg/m3. The exceedance occurred at night during cold, calm weather

conditions and is likely due to humidty (dew) effects.

No exceedences were recorded of the daily average TSP consent limit of 80 µg/m3 at EBAM3.

Table 4 – TSP and PM10 Monitoring Results for May

Monitoring Period

Description EBAM % Data capture

Concentration

in µg/m3

Project criteria in

µg/m3

01/05/15-31/05/15

Maximum Hourly Average TSP 2-southern area

83% 142 200

Maximum Rolling 24-Hour Average TSP 46 80

Maximum Daily Average TSP (Consent condition AQ.20 Trigger for investigation)

36 80

01/05/15-31/05/15

Maximum Hourly Average TSP 3-northern area

100% 233 200

Maximum Rolling 24-Hour Average TSP 45 80

Maximum Daily Average TSP (Consent condition AQ.20 Trigger for investigation)

38 80

5.4. Ground Water Monitoring

Monthly monitoring for piezometers identified in Appendix A of the Groundwater Management Plan

(GWMP rev 4) is on-going; with the exception of 2 piezometers which are still to be installed. The

piezometers are located in Ngati Whatua owned land within the grounds of Unitec and in the Dorje Chang

Institute, and will be installed when landowner approvals allow. As noted below, where a piezometer is

within a zone of active excavation twice-weekly monitoring is being undertaken.

Seasonal Trends

Total rainfall in May was 140 % of mean (Figure 1), following on from a relatively dry six months, which

included a very dry January (2nd driest on record). Overall a rise in groundwater level, typically ~ 0.5 m to

1.5 m, was seen across most of the site. The rise in groundwater level was more significant around the SAT;

in some piezometers up to 3.0 m, in direct response to the sustained period of rainfall near the end of May.



Figure 1 - Auckland Monthly Rainfall Data

Southern Approach Trench

The southern approach trench extends from approximate CH10530 (to the south) to the southern portal

head wall at CH11080. Dewatering via sump pumps in the excavation and below the base slab has been

occurring since September 2012. The SAT structure has been complete since August 2013.

Drawdown in the basalt, alluvium and ECBF reached steady state conditions (between March and June

2013) and groundwater levels have since fluctuated at or about the same level in response to changing

rainfall conditions.

Piezometers around the SAT have generally recorded a rise in groundwater level since the last report

(between 0.5 m to 3.1 m but typically 1.5 m). Groundwater levels are comparable to or higher than for the

same time period last year; the only exception being the groundwater level in the residual soils at DH826

which is 1.0 m lower than for the same time period last year.

Nine (9) piezometers continue to have groundwater levels fluctuating about or below alert trigger level, as

has been the case since early 2012 with groundwater levels having reached steady state conditions

(excluding seasonal fluctuations). These piezometers also have groundwater levels that are comparable to

the same time period last year. The water level in the ECBF at BH503a remains below the alarm level as per

previous reports.

As outlined in previous reports the potential for damaging consolidation settlement is considered to be

very low and groundwater levels in all piezometers except BH503 remain well above the alarm trigger

levels. As such approval has been sought to review the alert and alarm water levels in these piezometers,

0

20

40

60

80

100

120

140

160

180

200

220

240

260

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May-0

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Au

g-09

Sep

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9Jan

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Feb

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Mar-1

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May-1

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Sep

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1Jan

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Feb

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Mar-1

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Calendar Month

Auckland Monthly Rainfall Data

Whenuapai Wairau Rd Mt Albert Mt Roskill Avondale Mean Auckland Rainfall

Source: ARC Hydrotel website



and the draft rev 5 Groundwater Effects Management Plan has been updated accordingly. The GWEMP will

be submitted for certification this month.

Markers within 100 m of the area (generally located on control sections K, L and M) have been specifically

reviewed, with movement being within the trigger levels for these areas, and in many cases within the

accuracy of the survey (i.e. no movement that can be attributed to construction).

Tunnels

Tunnelling commenced on the 14th November 2013 and the TBM broke-through the Northern Portal,

completing the first tunnel on the 29th September 2014. The TBM recommenced on 3rd December 2014

however active excavation of the ground did not commence until 7th January 2015.

Tunnelling of the second drive recommenced on 23rd April 2015. Negligible drawdown has been observed

as a result of tunnelling; however, where a piezometer is located within 30 m of the tunnel a small rise in

groundwater level, due to pressurisation of the TBM face and annulus was observed. The groundwater

level fully dissipates within a couple of days.

The TBM is now within the zone where some connection to the creek (manifesting as bubbles due to the

propagation of air from pressurisation of the TBM face and annulus) was observed during construction of

the first tunnel; as such we have reduced the face pressure. Given the proximity to buildings in this zone a

careful balance between controlling ground settlement (by a higher face pressure) and reducing the risk

connection to the creek (by a lower face pressure) is required.

Drawdown has been observed associated with exploratory probe drilling and canopy tube drilling at the

cross passage locations. At the end of April, the groundwater levels in the following piezometers in East

Coast Bays Formation rock (EU) remain at or below alert level as a result of the probe drilling.

XP03: BH1111 (EU only) and BH1112 (EU and Alluvium)

XP06: DH920a (EW only)

The rapid response to the probe and canopy tube drilling indicate that at these locations there is a direct

connectivity with low storativity fractures resulting in rapid drawdown in the rock. In all cases the

groundwater levels are comparable to the drawdowns which were experienced during the first tunnel pass,

that resulted in no adverse environmental impact and which fully recovered post tunnelling. We expect

these will also recover over the coming months. Twice weekly monitoring will continue in the interim.

Excavation has commenced at XP03 (in Alan Wood Reserve), as such piezometers within 50 m of the face

are now within a zone of “active excavation” and are being monitored twice weekly.

Five (5) piezometers located around Cradock Street continue to have groundwater levels below alert trigger

level (as a result of a head intervention undertaken in July 2014). These piezometers have shown negligible

change in level since the last report. As with piezometers in Alan Wood Reserve we anticipate that

groundwater levels in these piezometers will continue to slowly recover over a long time period. However

as the groundwater levels in these piezometers remain well above the alarm trigger levels and the

drawdown is within the ECBF rock, the potential for damaging consolidation settlement is considered to be

very low (as confirmed by on-going survey monitoring).

The groundwater level in the residual soils at DH836, reported in alert last month, has now risen by 3.0 m

and is well above the alert level; comparable to the same time period in 2013 and 2014 confirming that this



is a naturally occurring seasonal low level. Long term monitoring indicates a seasonal range at this location

of 7.5 m.

Northern Approach Trench

The Northern Approach Trench extends from the northern portal head wall at approximate CH13500 (to

the south) to the beginning of the Great North Road interchange at approximately CH13800. Excavation is

at final depth (and base slab constructed) over this length with active dewatering underway since August

2013.

Groundwater levels have generally been steady since March 2014 with small fluctuations in response to

rainfall. Piezometers within 150 m of the trench have recorded a small rise in groundwater level (typically

0.5 m to 1.5 m) since the last report. Groundwater levels are comparable to the same time period last year

and the groundwater level in all piezometers is within consented levels.

5.5. Settlement Monitoring

Monthly monitoring of framework ground settlement markers identified in the Settlement Effects

Management Plan (draft SEMP rev4), and additional markers installed since that time continues.

Southern Approach Trench

The majority of markers continue to show movement within +/- 3 mm of their adopted pre-construction

minimum (i.e. within the accuracy of the survey). Though some small fluctuations are seen from month to

month, overall the markers show a broad flat trend since works commenced in 2012.

Two markers (Z154 and Z155) have continued to record downward movements in the range of 10 mm to 34

mm since March 2013. These markers form a differential pair (in accordance with condition S.17);

differential settlement between the two markers is calculated to be ~1/720 therefore the potential for any

adverse effects is considered to be negligible and all other markers in this area have indicated movement of

less than 3 mm to 5 mm (well within trigger levels).

Differential movement between all other differential marker pairs is flatter than 1 in 5,000 and remains

well below trigger levels, as are assessed building damage categories in the area.

Tunnels

Markers located within 150 m of the TBM location are monitored weekly during active tunnelling.

Construction markers directly above the TBM have indicated less than 15 mm of mechanical movement

due to the TBM. This is consistent with the construction of the first tunnel.

Markers around the buildings between 1481 Great North Road and 2 Oakley Ave have recorded 5 mm to 17

mm movement since December, comparable to the seasonal trend observed last year. These markers have

shown recovery in the last eight weeks; consistent with seasonal trends observed for the same time period

last year (i.e. the movement appears to be wholly seasonal with no tunnelling influence).

Markers on the buildings at 1510 Great North Road indicate a maximum cumulative settlement (i.e. from

both tunnel drives (and without filtering of seasonal movements) of 18 mm but typically less than 10 mm.

This is well within the consent limit of 100 mm and within the Alliance’s internal design target of 35 mm.

Differential movement is typically flatter than 1/2000 as a result of a slightly wider than anticipated trough,



which results in reduced strains and deflections. The calculated building damage category is “0” or

negligible damage (cf. to the consented limit of “2”).

Markers on the building at 1550 Great North Road, and Unitec, have shown no movement that can be

attributed to the passing of the TBM (i.e. less than 3 mm or within the accuracy of the survey).

For all tunnel markers, maximum movements are within consented limits.

Construction monitoring arrays in Oakley Esplanade, Great North Road and in the approach to the Northern

Portal had continued to record further movement since the end of tunnelling for the first drive. The cause

of on-going movement is under investigation however it is likely to be a combination of seasonal

movement (due to the exceptionally dry summer, including the 2nd driest January on record and large soil

moisture deficits) and on-going movement due to several active landslips in the area. Markers on these

monitoring arrays were installed for construction monitoring only, are located within Oakley Esplanade (i.e.

there are no buildings directly above) and are not part of the network of compliance monitoring; regardless

we note that the movement of two markers has exceeded the consented alert limit (75 mm) for this area.

We note that monitoring in the wider area indicates seasonal / background movement of 10 mm to 25 mm

are not unexpected in this area, and monitoring of the slip at the BP indicates slope movement of 20 mm to

70 mm per year. These markers have shown 5 mm to 10 mm recovery through May, comparable to

movement observed on markers in the surrounding area.

Marker E14 located on Blockhouse Bay Road is now above the adopted trigger level, having recovered 13

mm since March, comparable to observations from the same time period last year.

Two markers (Y53 and C10) continue to show movement fluctuating at or about trigger level (i.e. 5 mm), as

they have done since June 2013. This is coincident with the introduction of the deep benchmarks. These

markers are all more than 250 m from the alignment, and markers between their localities and the

alignment show negligible movement (i.e. there is no clear spatial pattern that can be attributed to

tunnelling or other construction activities). Movement is inferred to be seasonal movement that was not

picked up until the installation of the deep benchmarks and hence isn’t reflected in the adopted trigger

levels.

Northern Approach Trench

Surveyed ground levels have generally remained steady since the end of September, with minor

fluctuations in response to rainfall.

Markers around the NAT have shown movement in the range of 1 mm to 15 mm below their adopted pre-

construction level; well within adopted trigger levels.

Markers installed to monitor the slip adjacent to the BP on Great North Road (BP10 to BP22 and Z177)

recorded downward movement of up to 75 mm between October 2013 and April 2014, coincident with an

increase in the rate of movement in the inclinometers installed in the slip. Survey monitoring over summer

2015 suggests that the slip may again be showing some accelerated rate of movement (again up to 70 mm

between October 2014 and March 2015). Since mid-March the movement has stabilised, as it did last year

with the onset of rainfall. The Alliance is continuing to share monitoring data with BP and Auckland

Transport.

Markers located around the BP building and fuel tanks, and on Great North Road between the BP and the

construction zone, have indicated less than 7 mm of movement i.e. the larger movements appear to be



wholly related to movement of the land slip not construction related ground settlement, and all these

markers have been steady or shown upward movement since May 2014.

Differential movement between marker pairs is flatter than 1 in 1500 in all other areas and remains well

below trigger levels, as are assessed building damage categories in the area. Markers will continue to be

monitored and reviewed weekly.

5.6. Water Quality and Ecological Monitoring

5.6.1. Water Quality

Construction phase water quality monitoring in Oakley Creek/Te Auaunga has been carried out monthly, as

required by consent conditions, with the most recent routine monitoring carried out on 16 May 2015. The

weather on the day of sampling was passing showers, with heavy rain in the few preceding days (52 mm of

rain at Auckland Airport in the five days prior). There was evidence of recent high flows with debris high up

the banks.

Pre-construction and construction phase monitoring results are shown in Figures 2 to 7 below.

Figure 2: Turbidity data from sites WR1-WR5



Figure 3: Total suspended solids (TSS) data from sites WR1-WR5

Figure 4: pH data from sites WR1-WR5



Figure 5: Total copper data from sites WR1-WR5

Figure 6: Total lead data from sites WR1-WR5



Figure 7: Total zinc data from sites WR1-WR5

The May 2015 routine water quality monitoring data are summarised as follows:

Turbidity was slightly elevated at all sites compared to the April monitoring, presumably as a result of

rainfall on and prior to the day of sampling. However, suspended solids were relatively low at all

sites except WR1 (Waterview Glades), where TSS was slightly elevated compared to April, although

well within the previously measured range.

pH was near neutral at all sites.

Copper, lead and zinc were slightly elevated at all sites compared to April, although again were well

within th previously-recorded range. While zinc was slightly elevated at WR5, this site is an upstream

control site, and the raised zinc levels are unlikely to be related to WCA activities.

Overall, there is no indication of adverse water quality effects of the project.

5.6.2. Ecological Monitoring & Management

Fortnightly monitoring of significant vegetation, including geraniums, continues to be carried out. All

translocation of geranium plants from areas that will be affected by the works has been completed. This has

included successful transplanting into the Diversion B and C areas. Prolific growth of geraniums as well as

self-seeding has been recorded in both of these areas.



5.7. Contaminated Soil Monitoring

5.7.1. Site monitoring

No unexpected contaminated soil was reported during the month of May 2015. An account of the asbestos-

contaminated soil discovered at the end of April 2015 during earthworks for the Waterview Playground and

Sports Courts is attached in Appendix B. The table of total disposed soil for April 2015 that was included in

the April Environmental Report did not include the asbestos-containing spoil from the playground works. An

updated table of total quantities of spoil disposed offsite for April 2015 is included in Appendix B.

5.7.1. Soil disposal

More than 150,000 tonnes of tunnel spoil from the southern section was disposed to Wiri in May.

Construction of the Carrington Road and Great North Road interchanges also produced small amounts of soil

requiring disposal. The daily volumes of soil disposed from the southern and northern parts of the project

during the month of May are shown on Tables 6 and 7 respectively.

Table 6: Disposal location and approximate quantity of soil disposed of off site from the south in May 2015

Volume Volume

Tonnes tonnes m3 * Tonnes tonnes m3 *

1/05/2015 312.26 109,264.56 64,273 4,897.74 1,290,323.93 759,014

2/05/2015 109,264.56 64,273 908.60 1,291,232.53 759,549

4/05/2015 109,264.56 64,273 5,666.40 1,296,898.93 762,882

5/05/2015 109,264.56 64,273 7,813.18 1,304,712.11 767,478

6/05/2015 109,264.56 64,273 5,877.60 1,310,589.71 770,935

7/05/2015 109,264.56 64,273 5,409.88 1,315,999.59 774,117

8/05/2015 109,264.56 64,273 5,566.14 1,321,565.73 777,392

9/05/2015 109,264.56 64,273 1,067.50 1,322,633.23 778,020

11/05/2015 103.08 109,367.64 64,334 5,532.80 1,328,166.03 781,274

12/05/2015 109,367.64 64,334 7,631.08 1,335,797.11 785,763

13/05/2015 109,367.64 64,334 6,960.14 1,342,757.25 789,857

14/05/2015 109,367.64 64,334 7,773.71 1,350,530.96 794,430

15/05/2015 109,367.64 64,334 8,327.97 1,358,858.93 799,329

16/05/2015 109,367.64 64,334 4,352.42 1,363,211.35 801,889

18/05/2015 109,367.64 64,334 6,380.79 1,369,592.14 805,642

19/05/2015 109,367.64 64,334 7,384.78 1,376,976.92 809,986

20/05/2015 109,367.64 64,334 8,513.94 1,385,490.86 814,995

21/05/2015 109,367.64 64,334 8,271.82 1,393,762.68 819,860

22/05/2015 109,367.64 64,334 7,966.58 1,401,729.26 824,547

23/05/2015 109,367.64 64,334 2,844.18 1,404,573.44 826,220

25/05/2015 109,367.64 64,334 6,081.42 1,410,654.86 829,797

26/05/2015 109,367.64 64,334 5,029.80 1,415,684.66 832,756

27/05/2015 109,367.64 64,334 5,270.92 1,420,955.58 835,856

28/05/2015 109,367.64 64,334 7,794.35 1,428,749.93 840,441

29/05/2015 109,367.64 64,334 6,404.55 1,435,154.48 844,209

30/05/2015 109,367.64 64,334 2,194.52 1,437,349.00 845,499

Month of May 415.34 109,367.64 64,333.91 151,922.81 1,437,349.00 845,499

Date

Three Kings Managed Fill Site

Cumulative total

Wiri Disposal Site (Cleanfill)

Cumulative total



Table 7: Disposal location and approximate quantity of soil disposed of off site from the north in May 2015

Notes: * Estimated volume based on a soil density of 1.7 tonnes/m

3

^ Estimated volume based on 19 tonnes for an articulated truck

5.7.2. Phyllis Reserve landfill monitoring

5.7.2.1. Overview

Monitoring of landfill gas, pH and electric conductivity (eC) in selected groundwater wells at the Phyllis

Reserve commenced in October 2013 (i.e. 1 year prior to the estimated time of arrival of the tunnel boring

machine (TBM) beneath the landfill), to meet consent conditions CL.9 and CL.10. The monitoring programme

is described in Section 3.4.3 of the Contaminated Soil Management Plan Rev 4/5.

The intention of the monitoring is to establish if ground disturbance from the TBM has resulted in the release

of landfill gas or leachate into underlying groundwater.

Monitoring locations are shown on Map 5.1 below. Table 8 below provides summary information of the

groundwater wells that have been selected for pH and eC measurements.

Volume Volume

Tonnes tonnes m3 * Tonnes ^ tonnes m3 *

1/05/2015 86.84 20,964.78 12,332 697.36 63,464.02 37,332

7/05/2015 128.88 21,093.66 12,408 63,464.02 37,332

8/05/2015 248.04 21,341.70 12,554 63,464.02 37,332

11/05/2015 21,341.70 12,554 315.52 63,779.54 37,517

12/05/2015 322.04 21,663.74 12,743 31.58 63,811.12 37,536

13/05/2015 256.36 21,920.10 12,894 63,811.12 37,536

15/05/2015 106.22 22,026.32 12,957 29.46 63,840.58 37,553

20/05/2015 182.34 22,208.66 13,064 63,840.58 37,553

25/05/2015 236.26 22,444.92 13,203 63,840.58 37,553

26/05/2015 108.1 22,553.02 13,266 63,840.58 37,553

28/05/2015 23.86 22,576.88 13,281 63,840.58 37,553

Month of May 1,698.94 22,576.88 13,280.52 1,073.92 63,840.58 37,553.28


Cumulative total

Ridge Road Disposal Site

Cumulative total

Date



Map 5.1: Monitoring locations

MW4 MW3

MW1

MW2

BH709d

BH709a1

BH709a

BH709c

DH832



Table 8: Groundwater well summary information

Borehole ID Location Well screen depth (m) Screened geological unit

BH709d Northern boundary of landfill 1.5 – 5 Landfill material

BH707 Western boundary of landfill 5.5 – 9 Landfill material (Now decommissioned)

BH709a1 Northern boundary of landfill 6.5 – 10.5 Landfill material

BH709a Northern boundary of landfill 15.5 – 19.5 Weathered Waitemata Group, about 7.5 m below landfill base

BH709c Northern boundary of landfill 12.3 – 16.8 Tauranga Group, about 4.8 m below landfill base

DH832d Down gradient of landfill 5.5 – 8 Tauranga Group

5.7.2.2. Landfill gas monitoring results

Landfill gas monitoring was undertaken on 29 May 2015. Results of the landfill gas monitoring are provided in Table 9. Results are within the range of the historical and baseline monitoring data.

Table 9: Methane concentrations (% vol)

MW1 MW2 MW3 MW4

(up gradient)

Historical range1 0 – 0.3 0 – 5.9 0 – 24.2 0 – 0.1

25/10/2013 0 0 48 0

15/11/2013 0.1 0 27.1 0

13/12/2013 0.1 0 7.5 0.1

9/01/2014 0 0 15.3 0

28/02/2014 0 0 22.8 0

31/03/2014 0 0 13.6 0

29/04/ 2014 0 0 15 0

30/05/2014 Not sampled2 0 12.9 0

02/07/2014 0.1 0.1 22.5 0

21/07/2014 0 0 5.2 0

30/07/2014 0 0 13.7 0

29/08/2014 0 0 0 0

30/09/2014 0 0 2.4 0

16/10/2014 0 0 2.5 0

14/11/2014 0.1 0 27.4 0

15/12/2014 0.1 0.1 18.1 0

07/01/2015 0.2 0 14.6 0

16/02/2015 0.1 0 21.5 0

19/03/2015 0.1 0 18.9 0

16/4/2015 0.5 0 18 0

29/05/2015 0 0 0 0 1 Obtained from Auckland Council data - refer Contaminated Soil Management Plan Rev 4 2 No access to sample well as new lock had been installed



5.7.2.3. Groundwater monitoring results

Monitoring of selected groundwater wells occurred at the landfill on 27 May 2015 and continue to show

overall similar results to April 2015, except for electrical conductivity in well 709a1_6.5-10.5 m. The

conductivity reading in the sample collected in May decreased sharply, however, the parameter in this well

has a history of variability over the monitoring period so at this stage the conductivity is considered

acceptable. Graphs of the measurements, together with water level measurements, are presented overleaf.

Water levels in all wells are generally similar to levels at the same time last year.

pH and conductivity in all monitored wells are showing similar trends and are within the

preconstruction range.

The review continues to show that there is no clear indication of any water quality degradation that

can be associated with tunnelling and TBM activities under the landfill.



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5.8. Erosion and Sediment Control Monitoring

New and amended CESCP’s submitted to and approved by Auckland Council in May include:

34 Rev 2 – Removal of SRP10

47 – Maioro St off-ramp batter remedial works

123 Rev 3 – Topsoiling at eastern end of the Boomerang

126 Rev 2 – Topsoiling in the Cleaver

129 – Ramp 2 Median Works

Regular monitoring of erosion and sediment control has been undertaken in May 2015 by the Erosion and

Sediment Control Team and Construction Teams.

5.9. Archaeological monitoring

General archaeological monitoring continues by project archaeologists Clough and Associates in accordance

with consent conditions and the following Heritage New Zealand (HNZ) Authorities:

2013/174 - General Authority for earthworks in association with Stage 3 Northern Portal Works.

2013/518 - General Authority for earthworks in association with Stage 4 Great North Road Interchange

Works.

2015/296- General Authority for earthworks in association with the Howlett Reserve Footpath

The archaeological authority for the Oakley Inlet Heritage Area (OIHA) around the site of the old Star Mill has

been accepted by Heritage New Zealand. A general authority has been granted under the id 2015/1062. An

amendment to this authority being sought to cover planting and landscaping works that were not accepted

at the time of lodgment due to insufficient informaiton. Clough and Associates are to submit a revised

Management Plan to Heritage NZ which will cover the final works.

5.10. Waste Management

Regular inspections of the Waste Storage Areas are being carried out to ensure they are kept tidy and

recyclable materials are being separated. Yards are set up with bins for wood waste, plastic waste, general

waste and steel. Office areas have co-mingled recycling bins and paper bins.

Regular audits of skips are being carried out and opportunities to reduce waste generation and to reuse

materials whenever possible are regularly investigated.

Waste tracking for the project up to the end of May shows 68.48% of waste being diverted from landfill for

recycling. A break down for the project to date is shown in Table 10.



Table 10: Waste Records Project to Date (tonnes)

Wood Gib Metal Plastics Comingle Card & Paper

Poly-styrene

Hardfill General Waste

Total

611.69 3.94 390.51 85.92 40.48 37.46 8.51 470.26 775.16 2459.06

25% 0% 16% 3% 2% 2% 0% 20% 32% 100%

5.11. Hazardous Substance Management

Monthly inspections of hazardous substance storage areas and associated controls, such as spill kits, are

identified in the Hazardous Substances Management Plan (HSMP rev4) that has been prepared to meet

condition CEMP.10, and are ongoing.

There are hazardous substance storage areas for the Project established within construction yards CY6, CY9

and CY10, 160 Stoddard Road Southern Area stores and at East Tamaki Precast Yard. Hazardous Substances

and New Organisms (HSNO) Act 1996 certification requirements have been identified as below for these

storage areas, in liaison with the Project’s HSNO Test Certifier Pete Roche. During May, two staff were

certified as approved handlers, bring the total to 44 that have been certified on the Project. In addition the

location test certificate for CY9 was updated to allow for additional gas storage for tunnel team operations.

Table 11: Project Test Certification

Storage Area Test Certification Date certified

CY6 Northern area

Location test certificate: 250 litres class 3.1A, 600 litres class 3.1B and 3.1C (combined).

02 August 2014 – 01 August 2015

CY9 Tunnel team

Stationary Container System test certificate: 60,000 litres Sodium silicate. Stationary Container System test certificate: 30,000 litres diesel. Location test certificate: 2000kg class 2.1.1A, 400m3 class 5.1.1.

07 November 2013 – 06 November 2015 14 May 2014 -13 May 2019. 02 August 2014 – 01 August 2015

CY10 Tunnel team

Location test certificate: 600 litres class 3.1B and 3.1C (combined).

04 April 2015– 03 April 2016

160 Stoddard Road, Southern area

Location test certificate: 500 litres class 3.1B and 3.1C (combined).

02 August 2014 – 01 August 2015

East Tamaki Precast Yard Location test certificate: 6000 litres class 3.1B and 3.1C (combined).

02 August 2014 – 01 August 2015

6. Stakeholder Management

6.1. Stakeholders – local liaison activity

We continue to enjoy a good relationship with our surrounding communities, which is founded on a

proactive approach to informing of any changes to the norm and ‘personal service’ through our dedicated

community liaison managers. Beyond our everyday interactions with residents and the delivery of monthly

project updates, below is a summary of some of our local activity in May:

Southern & Tunnel sector



Ongoing liaison with specific residents above the tunnel alignment

Maioro Street on-ramp works notification – 5 letters in total because wet weather

Notification to residents at 23 and 33 Valonia Street properties regarding Retaining wall and fence

construction.

Notification to residents leiving near May Road regarding rock-breaking work

Liaison with Mt Roskill New World and AT Bus Depot around temporary traffic management impacts

Northern sector

Liaison with affected residents regarding upcoming and out of hours works in various places including: o Ground stabilisation on SH16 adjacent to Carrington Road Bridge and SH16 – two notices o Notification around the resumption of works on Ramp 4 o Night works notification at the Northern Approach Trench

Formal letter signed by Waterview School Principal and Board regarding the proposed construction of a permanent fence on boundary between school and project site.

Formal completion of documentation regarding St Francis School boundary fence

Site tours

There were 22 site tours during the month of March

Key visitors included o Auckand Council CEO – Stephen Town

There were 6 off site presentations to community groups

We hosted a visit to Alice the TBM for a group of TradeMe auction winners, they bid on tickets to support our Ride to Conquer Cancer team.

We hosted 20 delegates from the Asia Pacific Stormwater Conference, they visited the southern site to view the works around Oakley Creek regeneration.

6.2. General Communications Activity: Overview

We continue to get good feedback for the monthly Project Updates; these are distributed to around 5000 households each month and emailed out to thousands more. They offer updates on work, milestones reached, progress photos and a community corner. Last month we released three media releases announcing resumption of construction of GNRI ramp 4 after faulty concrete issue (this release covered in detail by NZ Herald), progress of TBM on main drive south (good coverage in the media) and Project and NZTA providing video interviews for British-based electronic magazine called Tunnel Talk about tunnel progress. We are contining work with the Ministry of Education to further advance the Engineering Challenge sponsored by the Minister of Tertiary Education. The Minister wants to use Waterview as an “Educational Tool” to encourage secondary school students to consider a career in engineering. We continue updating via Facebook, YouTube, Twitter and Instagram, all of which are gaining more followers. This month we put online the footage of a drone fly through of the project, it was a phenominal success, it was immediately shared on the NZ Herald website and Stuff.co.nz. This post had the most ‘likes’ and ‘shares’ of any of the posts to date. This also sparked a TV interview with TVOne. https://www.youtube.com/watch?v=e0Ogx3k2vBs

https://www.youtube.com/watch?v=e0Ogx3k2vBs



Key links www.facebook.com.alicetbm www.youtube.com/wcnow http://www.nzta.govt.nz/projects/waterviewconnection twitter.com/wcnow

6.3. Queries, Concerns and Complaints

Compliments: Five compliments were received in May. Largley relating to customer satisfaction in relation to positive community relationships and social media compliments. Complaints: Eight complaints were received during the month of May 2015. Four were not related to WCA but were received via our 0508 phone number. A summary of the other four complaints received is as follows:

Dangerous driving by truck leaving a southern site access. The incident is being followed up with the subcontractor.

Two incidents of noise from a truck braking at the weighbridge disturbing residents. This was followed up with the subcontractor who identified the driver concerned.

Weeds behind a noise fence encroaching on neighbours property. Maintenance has been completed to address this.

May 2015 Report

http://www.facebook.com.alicetbm/

http://www.youtube.com/wcnow

http://www.nzta.govt.nz/projects/waterviewconnection



Case Title Subject Case Type Origin Area Status Owner

Actual Start Date Street Name Suburb

Concern re earthworks in Teardrop at GNRI affecting health. (Not WCA, passed to CA to address.) ENV - Dust Concern Email North Resolved Claire Cooney 4/05/2015 Alberta Street Pt Chevalier

Complaint: Worker vehicles parking across driveway (NOT WCA) GEN - Traffic Complaint Phone North Resolved Jocelyn Shaw 5/05/2015 Oakley Ave Waterview

Complaint - Stone on the motorway broke windscreen (NOT WCA) GEN - Traffic Complaint Email South Resolved Jocelyn Shaw 6/05/2015

Complaint re noise of rumbling motor (NOT WCA) ENV - Noise Complaint Phone North Resolved Claire Cooney 6/05/2015 Alverston Street Waterview

Compliment from St Francis School re boundary fence GEN - Other Compliment In Person North Resolved Claire Cooney 6/05/2015 Montrose Street Pt Chevalier

Request for information from local board member re faulty concrete GEN - Other Request Email North Resolved Jocelyn Shaw 6/05/2015 Howlett Avenue Waterview

Concern re road marking and steel mats on Waterview section of SH16. GEN - Traffic Concern Phone North Resolved Claire Cooney 8/05/2015 SH16 Motorway

Request for information on Waterview Reserve GEN - Other Request Email North Resolved Claire Cooney 8/05/2015 Waterview

Compliments on Facebook regarding the Drone footage GEN - Other Compliment Web Project Wide Resolved Claire Cooney 11/05/2015 Waterview

Complaint re noise from trucks braking at 2.00am. Also earlier shifts 5.00am instead of 6.00am ENV - Noise Complaint Phone South Resolved Leigh Tracey 12/05/2015 Whittle Place

New Windsor

Compliment: A Big Thanks to the Tunnel Team GEN - Other Compliment Email Tunnel Resolved Jocelyn Shaw 12/05/2015

Complaint - weed growing from WCA site onto his property ENV - Other Complaint Phone South Resolved Leigh Tracey 13/05/2015 Hendon Avenue Mt Roskill

Concern - Someone jumped through construction fence between 10 -12 Howlett Street GEN - Other Concern Phone North Resolved Leigh Tracey 13/05/2015 Howlett Avenue Waterview

Complaint - strong vibrations being felt at family home (Not WCA) ENV - Vibration Complaint Email North Resolved Leigh Tracey 18/05/2015 Novar Place Point Chev

Compliment: Marque Blog & Waterview resident GEN - Other Compliment Web Project Wide Resolved Jocelyn Shaw 18/05/2015

Thanks for drainage pipe off cuts delivered to resident for hobby project GEN - Other Compliment Phone North Resolved Claire Cooney 19/05/2015 Pt Chevalier Road Pt Chevalier

Enquiry into who will cover costs incurred due to faulty concrete on Ramp 4 GEN - Other Request Phone North Resolved Claire Cooney 20/05/2015 Alford Street Waterview

Complaint: Loud engine braking noise at 7pm – not related to site. ENV - Noise Complaint Phone South Resolved Jocelyn Shaw 20/05/2015

Information: Stone deflected onto car from truck merging into SH20 GEN - Traffic Suggestion In Person South Resolved Jocelyn Shaw 26/05/2015

Request for Information - Fence replacement at 17 Valonia Street GEN - Other Concern In Person South Resolved Leigh Tracey 27/05/2015 Valonia Street Mt Roskill

Suspected oil spill from site at CY9 to reserve. Investigated immediately. Bund around diesel tank intact/ no sign of spill. ENV - Spills Concern Phone South Resolved Claire Cooney 28/05/2015 Hendon Avenue Owairaka

Complaint - Dangerous driving from truck leaving site onto motorway. Being followed up with trucking company. GEN - Traffic Complaint Email South Active Leigh Tracey 28/05/2015



Appendix A

Additional Consents Obtained

Additional consents obtained:

(New consents for the month shown in bold)

Consent Description Date Lodged Decision Date

R/LUC/2015/47163 Landuse consent for earthworks associated with the demobilising of the pre-cast yard at East Tamaki.

15th

May 2015 25th

May 2015

R/LUC/2015/1316 R/REG/2015/132

Landuse consent and coastal permit for works associated with the construction and occupation of a boardwalk at Eric Armishaw reserve.

10th

April 2015 7th

May 2015

R/LUC/2015/1113 Landuse consent for the construction and operation of a ablutions block at Valonia carpark, Alan Wood Reserve.

27th

March 2015

9th

April 2015

R/LUC/2014/5226 Landuse consent for the provision of a new car park and volleyball court for Alan Wood Reserve

15th

December 2014

21st

January 2015

R/LUC/2014/4244 Land use consent to construct and establish a new coastal pathway through the Howlett and Waterview Esplanade Reserves, Waterview

7th

October 2014

5th

November 2014

R/LUC/2014/3265 & R/REG/2014/3266

Land use and discharge permits to undertake enabling earthworks (preparatory only) to re-grade the Valonia Street carpark and change facility.

6th August 2014

1st September 2014

R/LUC/2014/926 Land use consent to remove native trees within an open space reserve

12th

Mar 2014 31st

Mar 2014

R/LUC/2011/4677 35 Valonia Street, New Windsor

Land use consent for temporary carpark and access way, associated earthworks and tree removal, and works within the dripline of protected trees.

16th

Dec 2011 20th

Jan 2012

ARC: 39983 35 Valonia Street, New Windsor

Landuse consent for earthworks. 16

th Dec 2011 20

th Jan 2012

R/LUC/2012/991 Alan Wood Reserve

Removal and works within the dripline of protected trees associated with the relocation of a wastewater pipe (the Hendon Sewer) within Alan Wood Reserve.

2nd

April 2012 30th

April 2012

ARC: 40316 - Stormwater ARC: 40318 - Industrial & Trade; ARC: 40319 - Air Discharge; and ARC:40627 – Landuse 53 Ormiston Road, East Tamaki

Integrated Land use consents (District & Regional) for the diversion and discharge of stormwater, the discharge of contaminants from an industrial or trade activity, the discharge of contaminants to air and parking and vehicular access infringements associated with the construction and operation of a Pre-Cast concrete facility at 53 Ormiston Road, East Tamaki.

16th

May 2012 15th

Aug 2012

R/LUC/2012/1879 6 Barrymore Road, Owairaka

Land use consent for removal of eight protected trees associated with the creation of pedestrian and vehicular accesses within Barrymore Road Reserve.

18th

June 2012 11th

July 2012

R/LUC/2012/2168 142-160A Stoddard Rd, Mount Roskill

Land use consent for the construction and use of a new Project Site Office at Stoddard Rd, including associated earthworks and parking.

11th

July 2012 8th

Aug 2012

ARC: 40097 and 40166 53 Ormiston Road, East Tamaki

Land use consents for land modification and land disturbance for construction of a Pre-Cast Facility.

16th

July 2012 13th

April 2012




R/LUC/2012/2568 Installation of above ground duct containing power, water and telecommunication services

Installation of an above ground duct containing power, water and telecommunication services to provide services to Construction Yard 11

10th

Aug 2012 29th

Aug 2012

R/LUC/2012/4601 Valonia Sportsfield Lights 35 Valonia Street, New Windsor

To construct a sportsfield lighting column, with 2000 watt medium beam lights mounted on a 16.5 metre high pole, at Valonia Sports Field (Field No.2). 12

th Dec 2012 8

th Feb 2013

R/LUC/2013/646 CY11 Carpark & Storage

CY11 Carpark Extension and Storage, including associated earthworks

25th

Feb 2013 22nd

April 2013

ARC: 41436 Stormwater CY11 Carpark & Storage

CY11 Carpark Extension – associated stormwater diversion

25th

Feb 2013 22nd

April 2013

ARC: 41437 Earthworks CY11 Carpark & Storage

CY11 Carpark Extension – associated earthworks

25th

Feb 2013 22nd

April 2013

R/TRC/2013/709 Richardson Rd Tree Removal

The removal of a generally protected tree located within the road reserve of Richardson Road associated with the shared pedestrian and cycleway.

1st

March 2013 5th

March 2013

R/LUC/2013/3071 Resource Consent for Recovery of the Lost Core Barrel in Alan Wood Reserve

Resource Consent Approval for recovery of the lost core barrel in Alan Wood Reserve.

16th

Aug 2013 17th

Sept 2013

R/OPW/2013/3106 Outline Plan of Works SH20 Extension Dominion Rd to Maioro St

Approval for the Outline Plan of Works for the widening of the existing State Highway 20 northbound alignment between Dominion Road and Maioro Street. 20

th Aug 2013 13

th Sept 2013

R/LUC/2013/3363 Dominion Rd to Maioro St NES Soils Consent

Discretionary activity consent for soil disturbance pursuant to Regulation 11 of the National Environmental Standard for Assessing and Managing Effects on Human Health (NES (Soil)).

4th

Sept 2013 3rd

Oct 2013

R/LUC/2013/3513 Resource Consent for relocation of an existing gas regulator unit

Resource Consent Approval for the relocation of an existing gas regulator unit within a road reserve

12th

Sept 2013 11th

Oct 2013

R/LUC/2013/4460 Trimming of a tree and removal of another at Unitec

Resource Consent for the trimming of a tree and removal of another at the Unitec site at 1 Carrington Rd

30th

Oct 2013 20th

Nov 2013

R/LUC/2013/4534 Demolition of 27 Parr Rd South dwelling

Resource Consent Approval for the demolition of 27 Parr Rd South dwelling

7th

Nov 2013 20th

Nov 2013




R/OPW/2013/4455 Outline Plan of Works Southern Ventilation Building, Control Building and Stack (OPW2)

Approval for the Outline Plan of Works for the Southern Ventilation Building, Control Building and Stack (OPW2) – No requests for changes.

30th

Oct 2013 2nd

Dec 2013

Alteration to Designation: Retaining Wall 603 (Unitec)

Alteration to Designation: Retaining Wall 603 (Unitec) ‘A07-01E Motorway: Western Ring Route – Waterview Connection, Alteration to Designation A07-01 SH16 between Great North Road and St Lukes Interchange

12th

Nov2013 6th

Dec 2013

R/OPW/2014/9 Outline Plan of Works Northern Ventilation Building, Control Building and Stack (OPW1)

Approval for the Outline Plan of Works for the Northern Ventilation Building, Control Building and Stack (OPW1) – No requests for changes.

16th

Dec 2013 18

th February 2014

R/LUC/2014/926 and R/REG/2014/929 Harbutt Reserve Tree Clearances

Approval for clearing and pruning trees within Harbutt Reserve for the purposes of installing Settlement Monitoring Rods.

11th

March 2014

31st

March 2014

NZHPT Authorities obtained:

Heritage New Zealand Authority – Howlett/Waterview Esplanade walkway

General Heritage New Zealand Authority for earthworks associated with the construction of Howlett/Waterview Esplanade walkway (Auth Number 2015/396)

Archaeological Authority required in accordance with Section 48 of the Heritage New Zealand Act

NZHPT Authority Southern Area Enabling Works

General NZHPT Authority for Earthworks in association with Southern Area Enabling Works

Archaeological Authority required in accordance with Section 12 of the Historic Places Act.

NZHPT Authority Southern Area Main Works

General NZHPT Authority for Earthworks in association with Southern Area Main Works


NZHPT Authority Northern Portal Works

General HPT Authority for Earthworks in association with Northern Portal Works


NZHPT Authority Great North Interchange Works

General HPT Authority for Earthworks in association with Great North Interchange Works




Appendix B

Summary of asbestos removal at Waterview Playground and Sports Courts

This report summarises the findings and remediation work undertaken in April 2015 at the proposed

Waterview Playground and Sports Courts area, located at the corner of Waterbank Crescent and Herdman

Street. An update to the total spoil volumes for April 2015 in the northern section is included at the end of

this appendix.

B1 Background

Asbestos-containing materials (ACM) were encountered in several areas of the proposed Waterview

Playground and Sports Courts area during excavation of surface soil at the end of April 2015 (refer Figure B1).

The ACM, based on the location where it was encountered, is likely to have been associated with either fill

material or incomplete demolition of previous structures (e.g. house cladding or roofing, or boxing of

concrete building foundations).

B2 Summary of remediation works

Remediation of the playground area was achieved by excavating and removing all ACM from the playground.

The excavation work was conducted by Nikau Demolition, supervised by a certificate of competence (CoC)

holder under the Asbestos Regulations 1998.

In all areas where ACM was discovered and including the stockpile areas, the ground was over-excavated by

a minimum of 50 mm below the last observed ACM fragments, and at least 500 mm laterally in all directions.

A visual inspection of the surface was carried out and validation samples were collected from the base of the

remediation excavation.

A total of 1,109 tonnes of ACM and associated soils were disposed of at Redvale Landfill (refer Table B3).

As a precautionary measure, and in order to progress works without waiting for the laboratory test results

for the validation samples, remediated areas were covered with bidim before the area was backfilled with

lime-stabilised clay and roller compacted. The bidim was placed to act as a visual deterrent/barrier for future

excavations, in the event that validation samples were to indicate asbestos-contaminated soils present

beneath the base of the remediation excavation. The bidim was overlapped by at least 200 mm to form a

continuous layer across the playground area and anchored with steel pins approximately every 5-10 m.

Natural East Coast Bays Formation clay, sourced from the retaining wall construction to the north of Unitec,

was placed directly on top of the bidim.

B3 Air Monitoring

Air monitoring was conducted for a minimum of 4 hours per day, each day ACM remedial works was being

undertaken (total of 6 days). Two air monitors were employed, one on the eastern and one on the western

boundary of the site (refer Figure B1). Air filters were analysed at Dowdell and Associates laboratory in

Penrose.

Air monitoring results are summarised in Table B1. Laboratory transcripts are attached. All samples were

below the laboratory detection limit and health screening level of 0.01 fibres/mL.



Table B1: Air monitoring results

Date Fibres in Air (fibre/mL)

Western boundary Eastern boundary

21/04/2015 <0.01 <0.01

22/04/2015 <0.01 <0.01

23/04/2015 <0.01 <0.01

24/04/2015 <0.01 <0.01

28/04/2015 <0.01 <0.01

29/04/2015 <0.01 <0.01

B4 Validation sampling and results

Validation samples were collected from the base of the remediation excavations (refer Figure B1), across the

playground. The samples were comprised of yellow-brown and orange clay with some silt.

Seven (7) samples, S1 – S7, were sent to Hill Laboratories in Hamilton to test for ACM, metals and

polyaromatic hydrocarbons (PAH). Three (3) of the seven (7) samples were analysed for total petroleum

hydrocarbons (TPH). One duplicate sample of S6 was collected for quality control and quality assurance

purposes. Another twelve (12) samples were submitted to Dowdell and Associates laboratory for qualitative

(presence/absence) ACM analysis. Full laboratory transcripts are attached.

No ACM was detected in all nineteen (19) samples sent for analysis.

Table B2 (following page) summarises the metals and PAH results, together with the assessment criteria

appropriate for the site, as follows:

NES Soil1 contaminant standards for recreational landuse; and

Permitted activity acceptance criteria for discharges outlined in the Auckland Regional Plan: Air Land and

Water (ALW Plan) and Proposed Auckland Unitary Plan (PAUP).

All samples tested for PAH and/or TPH had concentrations of these contaminants below the laboratory

detection limit. Metal concentrations were all below the NES Soil contaminant standards for recreational

land use and the permitted activity criteria for discharges in the ALW Plan and PAUP.

Conclusions

The validation programme confirms that the playground area has been successfully remediated with regards

to the proposed future land use from a ground contamination perspective.

1 Resource Management (National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human

Health) Regulations 2011



Table B2: Soil analytical results - metals

Metal NES Soil contaminant

standards for recreational landuse

ALW Plan /PAUP permitted activity discharge criteria S1 S2 S3 S4 S5 S6 Dup (S6) S7

Total Recoverable Arsenic 80 100 < 2 < 2 4 < 2 < 2 < 2 < 2 3

Total Recoverable Cadmium 400 7.5 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10

Total Recoverable Chromium >10,000 600 6 4 16 6 5 8 7 9

Total Recoverable Copper >10,000 325 3 3 21 4 5 4 4 5

Total Recoverable Lead 880 250 8.4 7.4 136 8.9 25 159 141 11.1

Total Recoverable Nickel 1,200 105 2 < 2 11 3 3 < 2 2 5

Total Recoverable Zinc 30,000 400 11 6 70 5 18 45 48 11

Table B3: Updated daily volumes of spoil for northern section for April 2015

Volume Volume Volume

Tonnes tonnes m3 * Tonnes ^ tonnes m3 * Tonnes tonnes m3 *

1/04/2015 - 20,664.76 12,156 433.18 60,222.20 35,425 - 978.43 576

2/04/2015 - 20,664.76 12,156 30.80 60,253.00 35,443 - 978.43 576

7/04/2015 - 20,664.76 12,156 166.48 60,419.48 35,541 - 978.43 576

8/04/2015 - 20,664.76 12,156 334.30 60,753.78 35,738 - 978.43 576

9/04/2015 - 20,664.76 12,156 377.62 61,131.40 35,960 - 978.43 576

10/04/2015 - 20,664.76 12,156 508.06 61,639.46 36,259 - 978.43 576

13/04/2015 - 20,664.76 12,156 427.32 62,066.78 36,510 - 978.43 576

15/04/2015 - 20,664.76 12,156 699.88 62,766.66 36,922 - 978.43 576

17/04/2015 24.04 20,688.80 12,170 - 62,766.66 36,922 - 978.43 576

21/04/2015 - - - - 84.56 1062.99 625

22/04/2015 - - - - 270.76 1333.75 785

23/04/2015 53.34 20,742.14 12,201 - 62,766.66 36,922 226.88 1560.63 918

24/04/2015 - - - - - 165.46 1726.09 1015

28/04/2015 - - - - - - 126.16 1852.25 1090

29/04/2015 - - - - - - 184.96 2037.21 1198

30/04/2015 135.80 20,877.94 12,281 - 62,766.66 36,922 49.86 2087.07 1228

Month of April 213.18 20,877.94 12,281 2,977.64 62,766.66 36,922 1108.64 2087.07 1228

Cumulative totalDate


Cumulative total

Ridge Road Disposal Site

Cumulative total

Redvale Disposal Site

waterview connection project (ca3466) · 2015-06-29 · monitoring results are shown in table 2....

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