Horsham Downs Substation NoR Issue-1.1

Horsham Downs Substation

New Substation Build

NOTICE OF REQUIREMENT

WEL Networks L imi ted: Horsham Downs Substat ion New Bui ld 2

Horsham_Downs_Substation_NoR_Issue-1.1 Last saved: 01/08/07 Our ref: WN 005 1205 Client ref: 112844

Quality Control Sheet Project: Horsham Downs Substation New Build Asset: Horsham Downs Substation Document: Notice of Requirement Client: WEL Networks Limited Prepared For: David Mollekin Project Manager: To be advised Client Reference: 112844 File Reference: WN 005 1205 Reviewed by: Laurence Sherriff Version: Issue 1.1 1 August 2007 For release Distribution: D. Mollekin WEL Networks Ltd E-mail Resource Consents Manager Hamilton City Council Post Produced by: Approved by: Kimberley Rolton Laurence Sherriff The Environmental Challenge Limited Date: 1/08/07 Limitations: This report has been prepared for the client according to their instructions. The information contained in this report should not be used by anyone else, or for any other purposes. Some of the information presented in this report is based on information supplied by the client. The Environmental Challenge Limited does not guarantee the accuracy of any such information. Any advice contained in this report is subject to this limitation.

WEL Networks L imi ted: Horsham Downs Substat ion New Bui ld 3


Table of Contents Item Page Form 18 ...........................................................................................................4 Annexure 1 ....................................................................................................11 Approval of WEL Networks as a Requiring Authority .....................................11 Annexure 2 ....................................................................................................12 Consideration of Alternative Sites and Methods ............................................12

Alternative Sites .........................................................................................13 Evaluation Criteria ......................................................................................14 Preferred Alternative ..................................................................................14

Annexure 3 ....................................................................................................16 Site Property and Planning Details ................................................................16

Site, Property and Planning Details............................................................17 Annexure 4 ....................................................................................................20 Description of the Project...............................................................................20

Scope of Works and Operation ..................................................................21 Site Layout .................................................................................................28 Substation Equipment ................................................................................28

Substation Yard Equipment ....................................................................29 Building Systems ....................................................................................30 Protection................................................................................................31 Site Access.............................................................................................31

Annexure 5 ....................................................................................................32 Assessment of Effects on the Environment and the Proposed Mitigation Measures .......................................................................................................32

Matters for Consideration ...........................................................................33 Environment Setting ...................................................................................33

Bio-physical Environment .......................................................................33 Socio-economic Environment .................................................................34 Cultural Environment ..............................................................................35

Magnitude and Significance of Environmental Effects................................41 Annexure 6 ....................................................................................................47 Planning Assessment ....................................................................................47

Resource Management Act, 1991 ..............................................................47 Designated Sites (Sections 166 to 186)..................................................47 Restrictions on Use of Land (Section 9) .................................................47

Regional and District Plans ........................................................................47 District Plans...........................................................................................47 Regional Plan .........................................................................................47

Rules, Conditions, Standards and Activity Status.......................................47 Appendix 1 - Site Drawings and Landscaping Plan Appendix 2 - Noise Level Predictions Appendix 3 - Oil Containment and Spill Mitigation Procedures Appendix 4 - NFPA Hazard Rating Sheets and HSFP Calculation Sheet Appendix 5 - Mitigation and Magnitude of Electric and Magnetic Fields Appendix 6 - “Electric and magnetic Fields and your Health” Appendix 7 - Substation Access-way Discussion Document Appendix 8 - Rototuna Structure Plan

Schedule I Resource Management (Forms, Fees, and Procedure) Regulations 2003


Form 18 NOTICE OF REQUIREMENT BY A REQUIRING AUTHORITY

FOR A DESIGNATION Section 168 (1) of the Resource Management Act 1991

TO: The Hamilton City Council 1. WEL Networks Limited (“WEL Networks”) gives notice of a requirement for a designation for an “Electricity Substation”. WEL Networks is a Requiring Authority approved under section 167 RMA. WEL Networks Requiring Authority approval was advertised in the Gazette as a Notice on the 18th of March, 2004; Gazette reference 30/689. Evidence of WEL Networks Limited requiring authority status is enclosed in Annexure 1. 2. Alternative sites, routes, and methods have been considered to the following extent: Under section 171(1)(b)(i) of the Resource Management Act, 1991 a territorial authority must have particular regard to the adequacy of consideration given to alternative sites, routes, or methods of undertaking the work if the requiring authority does not have an interest in the land sufficient for undertaking the work. WEL Networks does not have an interest in the land. WEL Networks has undertaken an evaluation of four sites. The evaluation is enclosed in Annexure 2. 3. The site to which the requirement applies is as follows: The proposed site is located west of Resolution Drive, in Rototuna, adjacent to the Borman Road extension. The legal description of the land on which the site will sit is Allot 518 Kirikiriroa Parish (SO 48706). The certificate of title is 49C/407. The land is owned by The Roman Catholic Bishop of the Diocese of Hamilton. The table and figures in Annexure 3 show the property and planning details of the proposed Horsham Downs Substation site. The proposed substation site boundary will be an irregular shaped lot (1,536 m2). It will contain a 37 m x 9 m (maximum) control building surrounded by a metalled yard and a strip for landscaping which will vary between 2 and 3 m in width. A section of the lot at the eastern end will be planted and landscaped. There will also be two entrance and access-ways leading onto the site. Drawings showing the property boundaries, site layout and profile, and entranceways are provided in Appendix 1.



4. The nature of the proposed public work (or project or work) is: The establishment, construction, operation, maintenance, replacement, repair, and minor upgrading of a substation, and parts of, and works for, or relating to, electricity transformation and distribution. Further details on the nature of the proposed works and operation, including the programme for the project are provided in the table in Annexure 4. The drawings in Appendix 1 depict the proposed project. 5. The public work (or project or work) and designation (or alteration) are reasonably necessary for achieving the objectives of the requiring authority because: The objectives of the requiring authority for which the designation is sought are: (a) The distribution of safe and reliable electricity to people, local

communities and industry in and around the Rototuna and Horsham Downs areas.

(b) The control of electricity flows over the distribution network. (c) The transformation of electricity from higher to lower voltages. The work is reasonably necessary for achieving the objectives of the requiring authority because: (a) The location of the Horsham Downs Substation has in part been

dictated by the electricity load (current and expected future demand) in the area. The site must be located as close as possible to the existing and anticipated electricity load.

(b) The electricity voltage must be lowered (i.e. transformed) so that it can be distributed, received and used by local households, communities and industry.

The designation is reasonably necessary, as a planning technique, for achieving the objectives of the requiring authority because: (a) The substation performs an extremely important function for people,

local communities and industry. Therefore, it must be protected from other land uses. A designation prevents a person from doing anything on a site that would prevent or hinder a project or operation to which the designation relates, without written consent of the requiring authority.

(b) Designated sites are shown on the district planning maps. This allows future land users to identify protected, sensitive and significant areas, in this case the Horsham Downs Substation, and to plan their land uses more effectively around such sites. It also allows future land users to avoid, remediate and mitigate any effects their activities might have on the substation. The Horsham Downs Substation is considered to be significant and sensitive part of the “environment” in terms of Section 2 of the Resource Management Act, 1991.



(c) Some developments by their very nature cannot comply with typical provisions in district plans and therefore risk cessation under any one of a number of procedures in the Resource Management Act, 1991. This may be because the development is limited to a certain site or that it has more than minor effects. Nonetheless, some of these activities are essential for the promotion of sustainable management, particularly with respect to enabling people and communities to provide for their social, economic and cultural wellbeing and their health and safety. These types of activities typically require high levels of investment and commitment in terms of people-time and resources. A notice of requirement (and the ensuing designation) is designed to provide a requiring authority with the certainty and means to plan for these types of projects and works. In light of this, it is considered that the Horsham Downs Substation construction requires the certainty offered by a notice of requirement and the ensuing designation.

(d) In dealing with a complex project such as the installation of a substation, it is only possible to provide a general and conceptual design, and not a full and detailed design, during the early stages of a project. The designation facility under the Resource Management Act, 1991 addresses this problem in a two step fashion: a notice of requirement provides the opportunity to lodge conceptual designs at an early stage; outline plans provide the opportunity to lodge detailed designs at a later stage. In light of this, it is considered that the development of the Horsham Down Substation design can be best communicated and consented using the two-step process provided under sections 168 and 176A of the Resource Management Act, 1991.

(e) The substation will require ongoing maintenance and possibly minor upgrading1 in the future. Maintenance and minor upgrades are an essential substation function and can occur on both a regular or irregular basis. The outline plan procedure under section 176A of the Resource Management Act, 1991 provides the requiring authority with a degree of certainty that it can conduct essential maintenance and where necessary minor upgrades, when needed, into the future. It also provides the requiring authority and territorial authority with an effective and efficient means for communicating and regulating activities within the substation, and for ensuring compliance with the Resource Management Act, 1991.

6. The effects that the public work (or project or work) will have on the environment, and the ways in which any adverse effects will be mitigated, are: An assessment of the effects that the project will have on the environment, including the proposed mitigation measures, is contained in Annexure 5.

1 No minor upgrades are currently planned.



7. The nature of the proposed restrictions that would apply is: WEL Networks Limited proposes that the designation be subject to the following conditions (or the like): (a) Construction noise emanating from the site shall not exceed the limits

in, and shall be measured and assessed in accordance with, New Zealand Standard NZS 6803:1999 Acoustics – Construction Noise.

(b) The substation shall be designed and operated to not exceed a noise level of 40 dBA (L10) at or as near as practicable to the boundary of any other site within the Residential Zone. Noise levels shall be measured in accordance with NZS 6801:1999 Acoustics – Measurement of Environmental Sound and assessed in accordance with NZS 6802:1991 Assessment of Environmental Sound.

(c) Electric and magnetic field levels at the substation property boundary shall not exceed the limits in the International Commission on Non-Ionising Radiation Protection (ICNIRP) guidelines endorsed by the National Radiation Laboratory, New Zealand Ministry of Health.

(d) Radio frequency radiation levels at the substation property boundary shall not exceed the levels specified in the New Zealand Standard NZS 6609: 1990 Radio Frequency Radiation.

(e) Landscaping shall be undertaken in general accordance with the landscaping plan submitted with the Notice of Requirement. The landscaping shall be maintained for the life of the substation.

(f) The management of hazardous substances shall be in general accordance with the information submitted in the Notice of Requirement.

(g) Dust and fine particulate discharged into the air from any earthworks shall not result in rates of deposition in excess of 4 grams per square metre per 30 day period. Any stockpiles of loose material shall be contained or maintained to prevent dispersal of material into the air.

(h) No new structures other than those specified in this notice, shall be erected on site after this notice of requirement is given, without the submission of an outline plan pursuant to section 176A of the Resource Management Act, 1991, unless the structures are a permitted activity in the Hamilton City Proposed District Plan.

(i) If Maori artefacts or European antiquity are uncovered during the earthworks the relevant iwi group and/ or appropriate museum institution shall be contacted to decide on what appropriate action to take. If artefacts made of organic material are uncovered from waterlogged or impervious mud or clays these shall be kept wet to prevent aerobic degradation until appropriate action, such as conservation treatment, is determined.

(j) If bodily remains are uncovered during the earthworks, the earthworks shall cease and the police, the Councils and any relevant iwi group shall be contacted to decide on what action to take. The earthworks shall not start until after the bodily remains have been removed and the necessary procedures or ceremonies have been conducted.



8. The following resource consents are (or are not) needed for the proposed activity and have (or have not) been applied for: It is considered that no resource consents from the Regional Council are needed for the proposed activity. In support of this claim an assessment of the relevant planning restrictions and provisions is provided in Annexure 6. A subdivision consent or a Certificate of Compliance for the subdivision of the site will be required. 9. The following consultation has been undertaken with parties that may be affected: Consultation is currently being undertaken with the potentially affected parties set out in Table 1.

Table 1 – Potentially Affected Parties

Landowners/ Neighbours/ Authorities/ Iwi Association with site Roman Catholic Bishop of the Diocese of Hamilton Bishop & Diocesan Depts Greg Schmidt – General Mgr Po box 4353 Hamilton

Landowner

Nga Maana Toopu O Kirikiriroa Wiremu Puke 105 Tawa Street, Hamilton

Local Iwi

Hamilton City Council Private Bag 3010 Hamilton 2020

Local District Council

Waikato Regional Council Box 4010 Hamilton

Local Regional Council

Sophia J Yapp 26 Gambia Grove Flagstaff Hamilton

Neighbour/ nearby landowner

Kevin and Lisa Rae 21 Gambia Grove Hamilton


Irene and Raymond Taylor & S and C Trustees Limited 19 Gambia Grove Hamilton


Paul and Nicollette Holloway 17 Gambia Grove Hamilton


Ian and Susan Megchelse 18 Killegray Close Flagstaff Hamilton




Landowners/ Neighbours/ Authorities/ Iwi Association with site Leslie and Sarah Graham 19 Killegray Close Flagstaff Hamilton


Vikki Brown & Justin Ooink 17 Killegray Close Flagstaff Hamilton


Jan Roznowski Dorota Nowogorska-Rosnowski 15 Killegray Close Hamilton


Christine and Michael Batty 13 Killegray Close Flagstaff Hamilton


Raymond and Kathryn Isaac 7 Killegray Close Flagstaff Hamilton


CDL Land New Zealand Ltd Level 13 280 Queen Street Auckland


The following consultation process is currently being undertaken with the potentially affected parties: (a) Send an information pack by post to the potentially affected parties and

ask them for comment on the project. (b) Phone or meet with those who do not reply to gain comment on the

project. (c) Meet with those people that have serious complaints or concerns. (d) Address any ideas, issues or concerns that are raised by the potentially

affected parties. (e) Send the details of responses from potentially affected parties, and any

actions taken to address any complaints or concerns, to the Hamilton City Council.

(f) Respond to the potentially affected parties as required. 10. Kimberley Margaret Rolton (on behalf of WEL Networks Limited) attaches the following information required to be included in this notice by the district plan, regional plan, or any regulations made under the Resource Management Act 1991. (a) Annexure 1 – Gazette Notice 30/689 (b) Annexure 2 – Consideration of Alternative Sites, and Methods (c) Annexure 3 – Site Property and Planning Details (d) Annexure 4 – Description of the Project (e) Annexure 5 – Assessment of Effects on the Environment and the

Proposed Mitigation Measures (f) Annexure 6 – Planning Assessment



11. Other matters: Designation to be provided for in the proposed district plan: Pursuant to section 175 of the Resource Management Act, 1991 the territorial authority must include the designation in its district plan and any proposed district plan (subject to certain conditions), and state the name of the requiring authority which has the benefit of the designation. As such, the designation will need to be provided for in the Hamilton City Proposed District Plan. ………………………………………………. Signature of person giving notice (or person authorised to sign on behalf of person giving notice) ……………………….. Date Lodgement Fee/ Deposit A deposit of $7000 is enclosed for the processing of this notice of requirement in accordance with the Resource Management Act 1991. All receipts should be made out to: The Environmental Challenge Limited. Address for service: The Environmental Challenge Limited 4/ 274 C Jackson Street, PO Box 33 215, Petone, Lower Hutt 5012, Telephone: 04 576 9644 Fax: 04 576 9643 E-mail: [email protected] Contact person: Kimberley Rolton, Resource Management Advisor

WEL Networks Limited: Horsham Downs New Substation Build Annexure 1


Annexure 1

Approval of WEL Networks as a Requiring Authority



Annexure 2

Consideration of Alternative Sites and Methods



Alternative Sites 2.1 Alternative sites have been considered for the substation. Alternative

methods for distributing, controlling and transforming electricity have also been considered. An outdoor substation was evaluated against an indoor substation scenario.

2.2 A number of sites around Rototuna have been evaluated against the

requirements of the RMA (section 168, RMA; Resource Management [Forms, Fees, And Procedure] Regulations 2003 Form 18; section 171, RMA). The sites are shown in Figure 1.

Figure 1 – Aerial Photograph of Alternative Sites

Source: GT Viewer, June 2007

2.3 Three sites underwent a preliminary evaluation. One site was

eliminated due to obvious practical limitations. Site 1 was sited too far to the north of existing electricity infrastructure and load demand.

2.4 The three remaining sites (Sites 2, 3 and 4) were evaluated in detail in

terms of the Hamilton City Proposed District Plan (HCPDP). 2.5 Two access route configurations for Site 3 were evaluated. The access

route evaluation also informed the site evaluation.

Site 1

Site 2 Site 3

Site 4



Evaluation Criteria 2.6 The evaluation involved an assessment of the:

• planning restrictions applicable to each site in order to determine the activity status of the work forming the projects; and

• planning duties applicable to each site in order to determine the scope of the matters to be considered by council, likely consultation requirements and likely monitoring conditions, and

• the ease of creation, and subsequent effects of access and entranceway locations, and

• the strategic planning of the Rototuna area as detailed in the Rototuna Structure Plan.

Preferred Alternative 2.7 The results of the evaluation are summarised in the following table.

The table evaluates the three remaining sites against key criteria drawn from the full assessment and evaluation.

2.8 Both sites 2 and 3 have the same activity status, and percentage of

activities that are permitted. However, the safety of the access and entrance way onto Resolution Drive is considered to be greater than that suggested for site 2 onto Cate Road.

2.9 Site 2 is also situated adjacent to an area suggested for education

(school) land use as per the Rototuna Structure Plan. 2.10 Negotiations for the purchase of site 3 were conducted. However after

detailed analysis of the Rototuna Structure Plan and consultation with the landowner it was determined that there were a number of practical limitations with the site.

2.11 Site 4 has potential for suitable access and is the nearest of the sites to

WEL’s existing network. 2.12 Site 4 is also considered suitable because there are no conflicts with

the Structure Plan for the development of the Rototuna Area. 2.13 An indoor substation was considered to be the best design considering

that the surrounding area is residential. 2.14 The evaluation summary (in the table below) indicates that Site 4 is the

alternative that is more likely to satisfy the requirements of sections 168 and 171 of the RMA.



Table 2 – Evaluation Summary of Sites 2, 3 & 4 Aspect Site 2 Site 3 (Resolution Drive

Access) Site 3 (Access through farmland)

Site 4

Overall Activity Status Discretionary Discretionary Discretionary Discretionary % of Project Activities that are Permitted

80 80 80 72

Predicted No. of Potentially Affected Parties

• Approx 6 parties • Iwi




Entranceway speed limit 100 kph 50 kph • 100 kph 50 kph

Entranceway line of sight (shortest of both directions)

50 m 150 m • 150 m 90 m

Conflict with Structure plan Adjacent to proposed school site

Potential site for proposed roadway or commercial town centre area

• Potential site for proposed roadway or commercial town centre area

• Major conflicts with structure plan due to access way requiring a strip of more than 200 m in length across the proposed structure plan development area

No conflicts

Indoor vs. Outdoor Substation Design

Indoor substation design preferred because it is located in a residential area beside a school

Indoor substation design preferred because it is located in a residential area





Annexure 3

Site Property and Planning Details



Site, Property and Planning Details 3.1 The proposed site will be called the Horsham Downs Substation. 3.2 The table below provides details on the site location for the project in

terms of: • Region/ District • General location/ orientation/ Grid reference • Legal and property descriptions • Tenure/ Ownership/ Requiring Authority details • Zone/ Overlay/ Designation information • References to applicable plan maps/ schedules.

Table 3 – Site, Property and Planning Details

Region/ District

Location Legal Description

Tenure Zone/ Overlay/ Designation/ Schedule

Plan Map/ Schedule Refs

Waikato Region Hamilton City

NZMG S14 2708819, 6384121 (or thereabouts) See Figure 2

Allot 518 Kirikiriroa Parish CT 49C/407 See Figure 3

Roman Catholic Bishop of the Diocese of Hamilton See Figure 3

Residential Zone See Figure 4

HCPDP2 Planning Map H16

3.3 The proposed site is shown below on the topographic, Terraview and

planning maps below.

2 HCPDP: Hamilton City Proposed District Plan, November 2001



Figure 2 – Topographic Map Showing Substation Location

Source: Memory-Map Navigator, November 2006

Figure 3 – Terraview Map Showing Substation Property Details

Source: Terraview (January 2007)

Approximate site location




Figure 4 – Hamilton City council Planning Map Showing Substation Zone Details

Source: Hamilton City Proposed District Plan Map H16 (extracted April 2007)




Annexure 4

Description of the Project



Scope of Works and Operation 4.1 The table below describes the project work and operation and gives

information on the following: • A breakdown of the activities forming the works • The objects and emissions associated with each of the activities • The dimensions, position and arrangement of activities and

objects • Additional information • Programme for the works (i.e. start and stop times, duration, daily

start and stop times, frequency, permanency). 4.2 Some assumptions have been made in the table in the absence of

specific information and data. 4.3 A Certificate of Compliance or Subdivision Consent application will be

lodged after this Notice of Requirement for the subdivision of the site.

WEL Networks Limited: Horsham Downs Substation New Build Annexure 4


Table 4 – Scope of Proposed Works and Operation

Activity Object/ Emission Dimensions/ Arrangement/ Position

Description Programme/ Timing

Cutting, excavating, removing, and backfilling, including compacting.

Soil, earth and other material, and graded metal

• Earthworks volume to be advised

• Final contour of the site will be flat, with banked landscaping soil to 600 mm

• Minor earthworks where spoil will be stockpiled for short periods (approximately two weeks) before re-use.

• Stockpiles will be contained. • Temporary activity resulting in noise and dust emissions from

earthworks • Exposed earth areas will be sowed with grass seed or

metalled

• During normal working hours: 7 am – 6 pm

• Temporary • Due to begin in

late 2007 or early 2008

Constructing/ laying

Entrance and access-ways The two entranceways will be constructed onto the Borman Road extension (designation 92) See Appendix 1 for drawings showing the entrance position

• They will be paved (metalled) • To enable entry or exiting the site • This is a temporary activity resulting in noise and dust

emissions • The entranceways will be chained off when not in use

See above


Foundations/ slabs for the: • building • transformers • circuit breakers • disconnectors • other smaller pieces of

electrical equipment

• Four 1.5 m2 foundations • Flat and flush to the ground • Building foundation approx.

9 m x 37 m

• There will be temporary construction noise and dust emissions

• There will be temporary traffic movements

See above

Constructing

Concrete bund wall • Around the perimeter of the transformer foundations

• Approximately 6 m x 10 m x 400 mm high

• To contain transformer oil during spills and stormwater • An automated isolation valve (triggered by the presence of

oil) is located on the stormwater drainage outlet of the transformer bund so if there is an oil spill, this will drain into a sump containing this AFL Industries Oil Stop Valve and alarm system

See above





Installing Oil containment/ interception facility

• Separation chamber & sump

• Another chamber with automatic oil shut off float valve

• The two transformer’s bunded area feeds into the sump • The oil shut off float valve floats in water to allow water to

escape through the outflow pipe under it, but sinks in oil, sealing the outflow pipe to stop the outflow. A water level sensor is to be installed above the normal water level with an alarm to indicate that the chamber is full.

• The outflow from the shut off valve will be discharged into a local storm-water drain. There will be a butterfly valve manual shutoff to interrupt the outflow.




Laying Subsoil drains In and around the substation area The exact location of any subsoil drains is to be advised

• The drains will not be visible • Affected areas will be revegetated

See above

Laying Pipes In and around the substation area The exact location of any pipes is to be advised

• Bunds will be drained to common site drainage, discharging into a suitable drainage channel

• The pipes will not be visible • Affected areas will be revegetated • Storm water and sewage water will be directed to council

services or to an on-site soak-pit.

See above

Laying Cables • 33 kV cables into the substation from the existing network

• 11 kV cables from the substation to the 11 kV distribution will be linked to existing underground network line

• Cables will not be visible • Affected areas will be revegetated

See above

Constructing Control/ switchgear building • Approximately 9 m x 37 m x 9 m high

• Low visibility from the road because it will be within the landscaping area

See Appendix 1 for drawings of the switchgear building

• The building will contain internal switchgear, load control plant and ancillary equipment

• There will be temporary noise and dust emissions • There will be temporary traffic movements • All other substation equipment will be within the building, and

therefore not visible from outside the site








Transporting Equipment To the site • The transformer will not contain oil during transportation, unloading or installation, so no oil spill can occur

• There will be temporary traffic movements

See above

Installing

Substation equipment: • two transformers • circuit breakers • disconnectors • indoor & outdoor

switchgear • other smaller pieces of

electrical equipment • telecommunication

equipment (antennae)

• Two 33/11 kV transformers, 18 MVA

• 33 kV circuit breakers • 33 kV disconnectors • Two antennae • Antennae Mast will not

exceed 15 m in height See Appendix 1 for drawings of the substation equipment

• There will be temporary noise and dust emissions • Transformer oil is currently classified as a “hazardous

substance” under the HSNO regulations3 • The antenna dimensions will meet the District Plan’s

permitted activity standards (diameter will not exceed 2 m)

See above

3 Transformer oil is classified and transferred by the Environmental Risk Management Authority.





Operating/ maintaining/ replacement/ upgrading

Substation equipment: • Two transformers • circuit breakers • disconnectors • indoor & outdoor

switchgear • other smaller pieces of

electrical equipment • telecommunication


Transformer noise levels to be determined in a noise assessment by Neville Hegley See Appendix 2 for approximate estimate of transformer noise levels (recommended noise limits in plan are estimated to be met at a distance of 10 m from the transformers)

• Noise emissions will result from operation of this equipment. • Noise attenuation will be incorporated into the design to

ensure that the noise level at the residential boundary complies with district plan requirements.

• Oil spill may occur during operation or maintenance • Upgrading activities may involve the replacement of

equipment with larger or additional equipment

Ongoing

Using Transformer oil • 15,000 L of transformer oil will be used in each transformer

• The total quantity of oil on site will therefore be 28.5 tonnes4

• The flash point for the transformer oil is 143 degrees Celsius

• The combined quantity ratio for the site is 4.12 (0.95 + 3.17)

See Appendix 4 for details of transformer oil

The CAS number for the transformer oil is 64741-96-4

Ongoing

Erecting Security and/ or perimeter fences and gates

• Approximately 2.2 m high • Located around the

perimeter but inside the landscaping zone

• Industry standard codes of practice and regulatory security arrangements will apply

• Standard substation construction wire mesh fence with steel poles and an electric security wire to deter rodent/ person entry


• Permanent • Due to begin in


4 This calculation is based on a specific gravity of .95 for the transformer oil. The specific gravity is multiplied by the total volume of 30,000 L.





Vehicle parking (cars and vans)

Area • This will be located within the switchyard area

• Will comply with vehicle parking requirements stated in the Plan

See Appendix 1 for drawings of the parking area

• No additional parking area is needed • Small single vehicles may park in the entranceway from time

to time for short periods

See above

Erecting Sign • Approximately 1000 mm x 500 mm

• It will be located at the site entrance way

• The sign will display information about WEL Networks and the substation name

• The dimensions will comply with the District Plan permitted activity

See above

Installing and operating

Night lighting • The lights will illuminate downwards

• Lights will operate inside the building

Night lighting is only used for emergencies • Intermittent, occurring approx. twice a month for short (approx 2 hours) durations

• Operated during the hours of darkness

Discharging Stormwater From the bunded area via the site drainage system

• Oil spill procedures will be in place (see Appendix 3) • The bund fitted beneath the transformers will prevent oil

spilling to ground • The bund will be fitted with an AFL. This is an automated

isolation valve (triggered by the presence of oil) and is located on the stormwater drainage outlet of the transformer bund. In the unlikely event of a spill, any oil will drain into the oil interception sump.

• The stormwater will be piped to an oil interception system and then discharged to a local stormwater drainage channel

Ongoing

Discharging Sewage From the toilet to existing sewage waste infrastructure

Sewage waste from the washroom will be discharged to council services

Ongoing

Discharging Subsoil drainage water From the subsoil drains beneath the site southwards towards existing infrastructure

Not a contaminant discharge in terms of what is defined as a contaminant under the RMA

Ongoing





Planting Landscaping vegetation • Approximately 5 m border around site

• There will also be a landscaped area on the eastern side of the lot

See Appendix 1 for drawings showing extent of landscaping

The selected plants may include Pittosporum species or lemonwoods (Pittosporum eugenoides) with native grasses lining the outer perimeter

• Planting will occur at the end of the works

• Ongoing • Due to begin

once substation building complete



Site Layout 4.4 The proposed site boundary will be close to a rectangular shape. The

approximate boundary lengths will be 28.88 m x 75.72 m x 33.70 m x 51.53 m (14.65 m + 14.65 m + 14.65 m + 7.58 m). The site will contain an approximately 5 metre wide strip for planting/ landscaping. There will also be an area of landscaping beside Resolution Drive.

4.5 Two access ways will lead onto the site from the Borman Road

extension. The entrance and access ways will also be designated up to the road boundary, which is also designated.

4.6 The drawings provided in Appendix 1 show the site layout and

demarcation of the proposed boundaries and entranceway. All areas within the boundaries, including the entrance and access way boundaries, form the designation area.

Substation Equipment 4.7 The substation will include the following equipment:

(a) Substation Yard Equipment (i) Oil Containment (bunding and interception facility) (ii) Switchyard Earthing (iii) 11 kV Cabling (iv) 33 kV Cabling (v) Outdoor Lighting (vi) Security and Security Fence (vii) Drainage (viii) Communication SYSCON (telecommunication antenna)

(b) Building Systems (i) Building (ii) 33 kV Indoor Switchgear (circuit breakers) (iii) 11 kV Indoor Switchgear (iv) Two 33/11 kV 11.5/23 MVA Transformers (v) Transformer Control Panel (vi) Remote Terminal Unit (vii) Signalling Plant (viii) Battery Systems (ix) Lighting and Smoke Detection (x) Security (xi) Water and Sanitation

(c) Protection (i) Cabling (ii) Switchgear

(d) Indication and Control (i) SCADA



Substation Yard Equipment Oil Containment 4.8 Bunded concrete pads will be located below each transformer, located

inside the building, and will drain into the oil containment facility which is designed to contain 30,000 L of oil.

Switchyard earthing 4.9 Switchyard earthing will be designed in accordance with IEEE STD 80-

2000 and WEL design and construction standards in mesh layout. Ground conditions are expected to present satisfactory conditions for earth current distribution within safe limits. The switchyard earthing will be located inside the perimeter of the security fence with the exception of a required earth perimeter wire installed 1 m outside of the fence for safety purposes.

33 kV Cabling 4.10 33 kV cabling from WEL’s 33 kV distribution network to the

transformers will be required. This cable will be buried.

11 kV Cabling 4.11 11kV cabling from the transformers to indoor switchgear will be

required. 4.12 In addition, 11 kV cabling from the indoor switchgear will be buried and

ducted to 11 kV lines. Outdoor Lighting 4.13 Outdoor flood lighting is required, which will be attached to the control

room. It will be required only for emergencies, or irregular maintenance and switching during the hours of darkness.

Security 4.14 Double entry gates, or a chained off driveway will be needed for

vehicular and person entry. Industry standard codes of practice and regulatory security arrangements will apply. The transformers are housed within a locked building, as shown in Appendix 1.

Parking 4.15 Parking for WEL staff/ contractors will also be provided on site. Communication SYSCON 4.16 The antennae will be located either on a 10 m high pole beside the

control room building or on the substation roof.



Building Systems Building 4.17 The substation building will be approximately 37 m x 9 m x 9 m high.

The building has been architecturally designed so that it is not obtrusive. It is similar in appearance as that of a residential dwelling. Conceptual drawings of this building are provided below and in Appendix 1.

Figure 5 – Conceptual Drawings of Horsham Downs Substation

Source: Spantech, 22 June 2007

4.18 Transformers, internal switchgear, load control plant and ancillary

equipment will be located in this building. It is proposed that low maintenance, fire rated construction materials be used to construct the building with concrete floor and cable channel ducting. Rainwater collection from the roof is proposed for washing facility.

Two 33/11 kV Transformers 4.19 Two 33/11kV 11.5/23 MVA transformers are proposed for the site.

Transport and crane will be required for movement. Each transformer will be connected to an indoor circuit breaker by buried 33 kV power cables.



33 kV &11 kV Switchgear 4.20 It is proposed that switchgear be installed. This should consist of

feeder panels with voltage transformers (VTs), circuit panels and associated current transformers (CTs), protection relays and local controls. Two 33 kV circuit breakers will be installed in the building.

Local Service Transformer 4.21 AC supplies are required within the control room for general services,

load control plant and battery charging. Lighting & Smoke Detection 4.22 Emergency lights may be needed inside the building depending on the

building type. 4.23 The building will have smoke detectors in each room which will be

linked to SCADA. Water & Sanitation 4.24 Connection to city services will be required for water supply and

wastewater disposal. Protection 4.25 All protection relays on switchgear and cabling will communicate to the

SCADA through the fibre optic cables. Site Access 4.26 The two access ways will extend to the boundary of Borman Road. See

Appendix 1 for drawings of the entrance and access-way design. 4.27 Appendix 7 contains a discussion document on the option of a single

entrance and access-way location. However, it has now been determined that it will be safer if large vehicles can drive through without having to carry out a three point turn within the site.

4.28 HCC has been informed of the proposed modification, but as yet no

response has been obtained.



Annexure 5

Assessment of Effects on the Environment and the Proposed Mitigation Measures



Environment Setting

Bio-physical Environment 5.1 The proposed site is located approximately 50 m west of the

intersection between the proposed Borman Road extension, and Resolution Drive.

5.2 The surrounding land to the west and north of the site is flat, and is

vegetated mostly with pastureland (see photographs below).

Photographs 1 & 2 – Surrounding pastureland

Source: TEC

5.3 A small stream/ stormwater drain runs in an east-west direction,

immediately south of the proposed site (see photographs below).

Photograph 3 – Stream immediately south of Site

Source: TEC

Location of substation

Location of Substation

Substation site

Stream



Photograph 4 – Stream immediately south of site

Source: TEC

Socio-economic Environment 5.4 Much of the surrounding land to the west and north of the proposed

site is used for pastoral farming. Traditional farming practices and objects dominate the landscape.

5.5 There is an increasing amount of residential and commercial

development in the Rototuna area, and in particular to the south of the proposed site (see photograph below).

Photograph 5 –Residential development south of site

Source: TEC

Substation site

Location of substation

Stream



5.6 The substation will be located adjacent to the extension of Borman Road. This road is currently being constructed, and is not yet used by traffic.

5.7 A number of construction activities and roading works are taking place

nearby. These activities form part of the receiving environment, however they are temporary activities.

5.8 The Rototuna Structure Plan (see Appendix 8) shows the possible

future developments in the area. The area surrounding the proposed substation is shown on the Rototuna Town Centre Concept Map below.

Figure 6 - Rototuna Town Centre Concept Map

5.9 The substation will be located opposite the proposed local commercial/

community node.

Cultural Environment 5.10 There are no pa zones, urupa, items of cultural heritage value or

archaeological features marked on the district plan maps in the area surrounding the site.

5.11 There are no records of any historic places, historic areas, wahi tapu

and wahi tapu areas according to the New Zealand Historic Places Trust.

5.12 There is a long history of pre-European Maori occupation of this area,

by various hapu, It is anticipated that the consultation process will confirm whether or not there are areas or objects with Maori or European cultural or heritage value located in the area.

Substation site



Matters for Consideration 5.13 The matters for consideration determine the scope of the Assessment

of Environmental Effects (“AEE”) and the consent authority’s consideration of an application.

5.14 When making a decision on a requirement, a territorial authority must

consider the effects of the activity on the environment (RMA 171(1)). The adequacy of consideration to alternatives must also be given regard if is it likely that the work will have significant adverse effects on the environment (RMA s171(b)(ii)).

5.15 In accordance with RMA s171(1)(a), the potential adverse effects on

the environment have been considered by having regard to the relevant provisions of, amongst other things (subject to Part 2): • Plans or proposed plans • Permitted baseline (RMA s104(2))

5.16 The table below sets out the matters that are relevant to the

consideration for the proposed work activity. 5.17 The AEE aims to show that the work will have no significant adverse

effects on the environment.



Table 5 – Identification of Environmental Effects Activity Object Matters for consideration Potentially

Affected Environment

Potential primary effects Potential secondary effects

• Neighbours • Motorists

• Dust emissions • Noise emissions • Traffic generation

• Public annoyance • Nuisance • Loss of health and

safety (road user conflict)

Cutting, excavating, removing, and backfilling, including compacting.


• Sections 5, 7 & 171 of the RMA • Objectives 4.1.2, 4.1.3, 4.2.1, 4.3.1, 7.2.1, 7.4.1 &

7.4.2 of the HCPDP • Policies 4.1.2b, 4.1.2c, 4.1.3c, 4.2.1a, 4.3.1c,

7.2.1a, 7.2.1b, 7.2.1d, 7.4.1a, 7.4.2a & 7.4.2d of the HCPDP

Iwi/ archaeological sites

Damage to or destruction of historical or cultural sites

Destruction of items of cultural significance


Entranceways • Sections 5, 7 & 171 of the RMA • Objectives 4.1.2, 4.1.3, 4.2.1, 4.3.1, 7.2.1, 7.4.1 &



Road users Addition of turning traffic and road user numbers

• Conflict of use between road users

• Compromised vehicle and pedestrian safety


Foundations/ slabs for the: • control room

building • transformers • circuit breakers • disconnectors • other smaller

pieces of electrical equipment

• Sections 5, 7 & 171 of the RMA • Objectives 4.3.1, 7.4.1, 7.4.2 of the HCPDP • Policies 4.3.1a, 4.3.1d, 7.4.1a & 7.4.2d of the

HCPDP

Neighbours • Dust emissions • Noise emissions

• Public annoyance • Nuisance

Constructing

Concrete bund wall • Sections 5, 7 & 171 of the RMA • Objectives 4.1.1, 4.3.1, 7.4.1, 7.4.2 of the HCPDP • Policies 4.1.1b, 4.1.1d, 4.1.1e , 4.3.1a, 4.3.1d,

7.4.1a & 7.4.2d of the HCPDP



Installing Oil containment/ interception facility

• Sections 5, 7 & 171 of the RMA • Objectives 4.3.1, 7.4.1, 7.4.2 of the HCPDP • Policies 4.3.1a, 4.3.1d, 7.4.1a & 7.4.2d of the

HCPDP





Activity Object Matters for consideration Potentially Affected Environment


Laying

Subsoil drains & pipes

• Sections 5, 7 & 171 of the RMA • Objectives 4.1.2, 4.1.3, 4.2.1, 4.3.1, 7.2.1, 7.4.1 &



Local Drainage Services

Overflow • Pooling • Loss of health and

safety

Laying Cables • Sections 5, 7 & 171 of the RMA • Objectives 4.1.2, 4.1.3, 4.2.1, 4.3.1, 7.4.1 & 7.4.2

of the HCPDP • Policies 4.1.2b, 4.1.2c, 4.1.3c, 4.2.1a, 4.3.1c,

7.4.1a, 7.4.2a & 7.4.2d of the HCPDP


• Dust emissions • Noise emissions • Traffic generation • Road obstruction


safety (road user conflict)

Constructing Control/ switchgear building

• Section 5, 7 & 171 of the RMA • Objectives 4.3.1, 7.4.1 & 7.4.2 of the HCPDP • Policies 4.3.1a, 4.3.1d, 7.4.1a & 7.4.2d of the

HCPDP

• Neighbours • Urban

landscape

• Noise emissions • Intrusion into existing

views

• Public annoyance • Nuisance • Loss of visual

amenity

Transporting Equipment

• Sections 5, 7 & 171 of the RMA • Objectives 4.2.1, 4.2.3 & 4.2.4 of the HCPDP • Policies 4.2.2a, 4.2.3c & 4.2.4a of the HCPDP

• Soil • Stream • Neighbours

Oil spill • Contamination of soil • Contamination of

waterways • Loss of health and

safety Neighbours • Noise emissions

• Production of electric & magnetic fields and radio-frequency emissions


safety • Effects on urban

amenity • Soil • Stream • Neighbours

Oil spill • Contamination of soil • Contamination of


safety

Installing/ Operating/ maintaining/ replacement/ upgrading

• two transformers • circuit breakers • disconnectors • Switchgear • indoor & outdoor

switchgear • telecommunication


• other smaller pieces of electrical equipment

• Sections 5, 7 & 171 of the RMA • Objectives 4.3.1, 4.4.3, 7.4.1, 7.4.2 of the HCPDP • Policies 4.3.1a, 4.3.1b, 4.3.1d, 7.4.1a & 7.4.2d of

the HCPDP

• Dwellings • Future

development • Communities • Industries

Improved efficiency and security of electricity supply

• Social and economic wellbeing and health and safety

• Economic benefits





Using Transformer oil

• Sections 5, 7 & 171 of the RMA • Objective 6.6.1 of the HCPDP • Policies 6.6.1a, 6.6.1b & 6.6.1d of the HCPDP

• Soil • Stream • Neighbours

• Oil spill • Fire/ explosion

• Contamination of soil • Contamination of


safety • Neighbours • Urban

landscape

Intrusion into existing views • Public annoyance • Loss of visual

amenity

Erecting

Security and/ or perimeter fences and gates

• Sections 5, 7 & 171 of the RMA • Objectives 4.3.1, 7.3.1, 7.4.1, 7.4.2 & 7.5.1 of the

HCPDP • Policies 4.3.1a, 7.3.1a, 7.3.1b, 7.3.1c, 7.4.1a,

7.4.2a, 7.5.1d, 7.5.1e, 7.5.1g & 7.5.1i of the HCPDP

Public Restrict access to substation

Improved health and safety

Creating Parking • Sections 5, 7 & 171 of the RMA • Objectives 4.3.1, 7.3.1, 7.4.1, 7.4.2 & 7.5.1 of the



Road users Provide parking facility Improved health and safety

Erecting Sign

• Sections 5, 7 & 171 of the RMA • Objectives 4.3.1, 7.3.1, 7.4.1, 7.4.2 & 7.5.1 of the



• Neighbours • Urban

landscape

Effects on urban amenity • Public annoyance • Loss of visual

amenity


Night lighting • Sections 5, 7 & 171 of the RMA • Objectives 4.3.1, 7.3.1, 7.4.1, 7.4.2 & 7.5.1 of the




Light spill and glare

• Public annoyance and nuisance

• Driver distraction • Loss of health and

safety

Discharging Storm-water, sewage and subsoil drain water

• Sections 5 & 104 of the RMA • Objective 5.2.2 of the WRP • Policies 3.5.3, 4 & 5.2.3 policy 1 of the WRP • Objectives 9.1.4 & 9.1.10 of the WDP • Policy 9.2.13 of the WDP

• Soil • Road drains

• Soil contamination • Pooling of water • Odour

• Groundwater contamination

• Surface water contamination

• Loss of health and safety






Planting Landscaping vegetation

• Sections 5, 7 & 171 of the RMA • Objective 4.3.1 of the HCPDP • Policy 4.3.1a of the HCPDP


Screening of substation Improve visual amenity



Magnitude and Significance of Environmental Effects 5.18 The table below identifies and predicts the magnitude, and evaluates

the significance of the effects arising from the proposed works and operation.

5.19 The magnitude of the effects is predicted having taken the proposed

mitigation and monitoring measures into account. 5.20 The effects have been evaluated using the scale below, which is

provided on the Quality Planning website:5 • Positive Effects • Nil Effects - No effects at all. • De minimis Effects - Minute level of effect that is basically

unnoticeable over ordinary day to day effects • Minor Adverse Effects - Adverse effects that are noticeable but that

will not cause any significant adverse impacts. • Significant Adverse Effects that could be remedied or mitigated -

An effect that is noticeable and will have a serious adverse impact on the environment but could potentially be mitigated or remedied.

• Unacceptable Adverse Effects - Extensive adverse effects that cannot be avoided, remedied or mitigated.

5.21 It is considered that the adverse environmental effects associated with

the proposed project will be minor adverse effects, de minimis effects, or nil.

Mitigation Measures 5.22 The mitigation measures are identified in the table below.

5 http://www.qp.org.nz/consents/assess-enviro-effects.php#extent



Table 6 – Assessment of Environmental Effects Potential primary effect

Potential secondary effects

Avoidance/ Remediation/ Mitigation Magnitude Significance

Dust emissions • Public annoyance

• Nuisance • Loss of health

and safety (road user conflict)

• Activities will be undertaken during normal working hours (7 am – 6 pm). • All stockpiles of earth will be contained. • The soil may be re-used in some instances. • Excavated areas will be regrassed or metalled.

• The dust emissions will be temporary. It is estimated that the earthworks will last approximately two weeks. • The soil will only be stockpiled for a short period (approximately two weeks). • The exposed area is relatively small and flat, so dust emissions will be minimal. • Existing construction and roading activates form part of the receiving environment. • Water sprayers can be used to prevent dust along the road.

De minimis

All excavation and construction activities • Activities will be undertaken during normal working hours (7 am – 6 pm). • The selected contractors will be required to comply with the New Zealand Standard 6803:1999 Acoustics – Construction Noise by way of their contract agreement.

All excavation and construction activities • The area to the north of the substation is rural, and dominated by pastoral land use. • There are no rural dwellings within close proximity to the proposed substation site. • There are approximately 6 urban residential dwellings 100 m to the south of the substation. • The noise emissions will only be temporary. • Existing construction and roading activates form part of the receiving environment.

Minor Noise emissions

• Public annoyance

• Nuisance

Operating substation equipment • The transformers will be located within a building thereby substantially reducing noise levels. • There will be a layer of vegetation providing a perceptual barrier to noise emissions. • Sound attenuation measures can be incorporated into the design of the building to comply with the noise limits in the plan. • A noise assessment will be undertaken by Neville Hegley and Associates which may recommend measures to mitigate noise emissions if required.

Operating substation equipment • The substation is located in the Residential Zone that is dominated primarily by residential development to the south, and pastureland to the north. • There are approximately 6 dwellings within 100 m of the substation. • The transformers and electrical equipment will be housed within a building, therefore the nearby residential dwellings will be shielded from noise emissions. • Screening will minimise the psychological effect of noise emissions. • The noise level for residential zone is predicted to be met at a distance of 10 m from the transformers (See Appendix 2).

Minor



Potential primary effect



Traffic generation Loss of health and safety (road user conflict)

• Activities will be undertaken during normal working hours. • The minimum line of sight stated in the plan is 160 m and will be met in both directions from the entrances. • There will be adequate area for machinery and parking within the site boundary.

• There will be a temporary increase in vehicle movements to and from the site during construction work. • All equipment will be kept clear of the road during construction. • The types of vehicles used for substation construction will include trucks and excavation machinery, as well as a crane. • Borman Road has not yet been constructed so motorists are currently not using this road.

Minor

Damage or destruction of historical or cultural sites

Destruction of items of cultural significance

• If any Maori artefact or European equity is uncovered during earthworks, the relevant iwi group and/ or appropriate museum institution be contacted to decide on the appropriate action to take. • If any bodily remains are uncovered during the earthworks, the earthworks shall cease and the police, council and any relevant iwi group shall be contacted to decide on the appropriate action to take. The earthworks shall not start until after the bodily remains have been removed and the necessary procedures or ceremonies have been conducted.

• Based on observations of the Hamilton City Proposed District Plan and the Historic Places Trust register, it appears that there are no sites in the vicinity of the proposed site holding Maori or European cultural, spiritual and heritage values. • If this is indeed the true representation then it is considered that there should be no loss of cultural, spiritual and heritage values. However, this will need to be confirmed via consultation with iwi.

To be determined during consultation

Addition of turning traffic and road user numbers

• Conflict of use between road users • Compromised vehicle and pedestrian safety

The minimum line of sight stated in the plan is 160 m and will be met in both directions from the entrances.

• Once commissioned, the ongoing maintenance of the substation will only involve intermittent and minor increases in vehicle movements to and from the substation (6-8 movements/month). • The substation site will be located near the intersection of Borman Road and Resolution drive so traffic speed in this area will be low. • Borman Road has not yet been constructed so motorists are currently not using this road.

De minimis






Substation buildings facilities and equipment • All substation equipment will be located within a building so it will not be seen. • The substation building will be designed to have a “residential” appearance. • Planting will take place around the entire perimeter of the site within the landscape strip. • The plants will grow to an approximate height of 8 m. These are likely to be evergreen, slow growing types suited to the open wet conditions of the locality. • The plants will be closely spaced in order to provide a dense coverage. Once the plants are mature the majority of the substation will be screened from view. • Parts of the substation will be visible through the entrance way but only for a limited range of viewing angles. • The sign will be barely legible to passing drivers. • The sign will not obscure or confuse the interpretation of “official signs” or traffic signals on the state highway.

Substation buildings, facilities and equipment • Construction of substation buildings and facilities will maintain the aesthetic qualities of the residential area. • All substation equipment will be located in a building, and the building will be screened by landscaping. • The substation building will be designed to be aesthetically pleasing (See Appendix 1). • There are approximately 6 dwellings already within 100 m of the substation • The intersection of Borman Road and Resolution drive will be a significant local visual feature, and will most likely contain a public art in the form of a sculpture. • The structures on site comply with the relevant Residential Zone standards for permitted activities in terms of size, lot coverage, set back and landscaping. • The sign will not be illuminated so there will not be any glare. • There will only be one small sign. It will be located at a low level at the entranceway to the substation.

Minor • Intrusion into existing views • Effects on urban amenity

• Public annoyance • Loss of visual amenity

Laying drains, pipes and cables Areas where excavations occur will be re-grassed/ metalled

Laying drains, pipes and cables There will be no visual change after mitigation

Nil






• Overflow • Pooling

• Odour • Contamination of waterways • Public annoyance and nuisance • Loss of health and safety

• Discharges of stormwater will be from bunded areas into existing services. • The discharge of wastewater will be into existing services.

• Roadside pooling will not occur because the discharges will flow into existing services. • The services will accommodate the proposed discharges.

Nil

• Oil spill • Fire/ explosion

• Contamination of soil • Contamination of waterways • Loss of health and safety

• Oil will not be contained in the transformers when they are being installed. • The area beneath the transformers will be bunded. • The bunded area will contain an automated isolation valve so that should an oil spill occur from the transformer this will be contained. • The bunded area drains into a sump containing an AFL Industries Oil Stop Valve and alarm system (i.e. an oil interceptor system which is designed to contain the amount of oil in the largest transformer and rainwater). • The contractors are required to maintain oil spill procedures, including an oil spill contingency plan (see Appendix 3). • Furthermore, the substation must keep and maintain approved industry standard oil spill containment kits on site. • The substation site will be secured from unauthorised entry by a fence, and the equipment will be housed within a locked building

• Transformer oil is a mineral oil prepared from the distillation and refining of petroleum. It comprises a complex mixture of three main groups of hydrocarbons: aromatic (10%), naphthenic (40-50%) and paraffinic. The exact composition is unknown, but the aromatic fraction is likely to contain polycyclic hydrocarbons, some of which are carcinogenic and mutagenic. Of the chemicals present in the transformer oil, these are likely to be the most hazardous in terms of water quality. The “NFPA Hazard Rating” sheets provided in Appendix 4 detail some of the physical and chemical properties. • The transformer oil is a non-PCB liquid6. • A major spill or explosion is unlikely outside of a natural disaster or deliberate human sabotage.

De minimis

Restrict public access


The security gates are a mitigation measure to ensure the public cannot access the substation.

Health and safety will be improved as public cannot enter the site.

Positive

6 Department of Health Publication: PCBs (Polychlorinated Biphenyls) Core Group and Hazardous Wastes Tasks Group. December 1988. Safe Management of PCBs: Code of Practice.






Provide parking facility


Parking is a mitigation measure to ensure that vehicles do not park on the side of the road.

Health and safety of motorists will be improved as vehicles are contained within the site.

Positive

Light spill and glare

• Public annoyance and nuisance • Driver distraction • Loss of health and safety

• The substation will be screened with trees around the perimeter of the site. • The lights will illuminate downwards. • The lights will be directed away from Borman Road and nearby dwellings.

• Night lighting is only used for emergencies and out of hours faults. • The effects will be infrequent. Approximately twice a month for short durations (approximately 2 hours) during the hours of darkness. • The lights will be off 99% of the time. • There will be a layer of screening to minimise the effect when it does occur. • The lighting levels will be less in magnitude and frequency than the typical levels of light spill emanating from a rural dwelling located on the roadside.

De minimis

Electric & magnetic fields

Loss of health and safety

Operating substation equipment See Appendix 5

Operating substation equipment See Appendix 5

Nil

Maintenance of urban amenity

Improve visual amenity

Planting is a mitigation measure to minimise adverse visual effects.

Planting will screen the building from the road and residential dwellings.

Positive



Annexure 6

Planning Assessment



Resource Management Act, 1991

Designated Sites (Sections 166 to 186) 6.1 WEL Networks became a requiring authority under section 167 of the

RMA on 18 March, 2004. Under section 168(2), a requiring authority can at any time give notice to a territorial authority of its requirement to designate a site or route.

6.2 A designation is a provision made in a district plan which relates to an

area. A designation authorises a requiring authority to carry out its work on a site without the need for a land use consent under section 9(1) from the relevant territorial authority7.

6.3 Once the designation is made, the requiring authority can do anything

on a designated area that is in accordance with the purpose of the designation without restriction from the district plan. However, in some instances a requiring authority must submit an outline plan to the territorial authority before it begins work on a designated site. An outline plan is a plan or a description of the work.

6.4 Activities of a requiring authority on a designated site are not exempt

from resource consents required by correct authorities under sections 9(3), 12, 13, 14 and 15. Furthermore, they must comply with the general requirements of section 16, that is, the duty to avoid unreasonable noise.

Restrictions on Use of Land (Section 9) 6.5 In the absence of a designation, the proposed work and operation is

subject to section 9 of the Resource Management Act, 1991. 6.6 In accordance with section 9(1), no person may use 8 any land in a

manner that contravenes a rule in an operative or proposed district plan, unless the activity is expressly allowed by a resource consent granted by the territorial authority responsible for the plan, or an existing use allowed by section 10. Note that section 9(1) does not apply to activities on a designated site that are consistent with the designation.

6.7 In accordance with section 9(3), no person may use any land in a

manner that contravenes a rule in an operative or proposed regional plan, unless that activity is expressly allowed by a resource consent granted by the regional council responsible for the plan, or an existing use allowed by section 20A.

7 Designations are sometimes described as ‘spot zones’. 8 The term “use” includes “erection, reconstruction, placement, alteration, extension, removal or demolition of any structure or part of any structure in, on, under, or over the land”.



Regional and District Plans District Plans 6.8 Parts of the proposed work and operation fall under the jurisdiction of

the Hamilton City Proposed District Plan. 6.9 The plan regulates activities ‘captured’ by sections 9 and 16 of the

RMA. Regional Plan 6.10 Parts of the proposed work and operation fall under the jurisdiction of

the Proposed Waikato Regional Plan. The proposed plan has been updated to December 2006. The regional plan is administered by Environment Waikato.

6.11 The Proposed Waikato Regional Plan regulates activities caught by

sections 9 (3) and 15 of the Resource Management Act, 1991 (e.g. earthworks, and contaminant and water discharges).

Rules, Conditions, Standards and Activity Status 6.12 A preliminary assessment of the rules, conditions, standards and

activity status applying to the various activities is outlined in Table 7 with respect to sections 9, 15 and 16 of the Resource Management Act, 1991.

6.13 Table 7 does not include the requirements of section 11, or the relief

provided by sections 168, 176 and 176A of the Resource Management Act, 1991.

6.14 In the absence of a designation the activity status of the proposed

substation would be discretionary under Rule 3.3.1 and 3.3.2 of the Proposed Hamilton City District Plan.



Table 7 – Planning Restrictions and Provisions Activity Object RMA

SectionPlan Rules/

Standards Conditions

Comment/ Evidence Activity Status

• 9 (1) • 16

HCPDP • Rule 6.2 • Rule 2.1 • Rule 6.7.1a

• Excavation and Earthworks must be carried out in accordance with good engineering practice

• Contractors will be required to meet the construction noise limits in NZS6803P:1999 – The Measurement and Assessment of Noise from Construction, Maintenance and Demolition Work

• Earthworks will comply with the relevant Regional Plan rules

• Earthworks will not occur in an Environmental Protection Overlay

• No vegetation will be removed

Permitted

Cutting, excavating, removing, and backfilling, and compacting.


9 (3)

PWRP • Rule 5.1.4.11 • Rule 5.1.5

Earthworks must not occur in an area defined as a High Risk Erosion Area (within 10 m of a waterway)

• Complies with the Permitted Activity Rule (Soil Disturbance, Roading, Tracking and Vegetation Clearance) because the activity involves minor earthworks and vegetation clearance

• Complies with all Rule 5.1.5 Conditions for Permitted Activity Rule 5.1.4.11 Standards and Terms for Controlled Activity Rules (Accelerated erosion)

• There will be no earthworks within 10 m of the stream (High Risk Erosion Area)

Permitted


Entrance and access-ways

• 9 (1) • 16

HCPDP • Table 5.2-3 • Table 5.2-4

• Access must be between 3 and 5.5 m in width

• A minimum of 65 m line of sight is required

• Intersection and Vehicle Access separation distance of 55 m is required

• Access will be created onto the Borman Road extension.

• There will be two entranceways • One entrance will not meet the

intersection separation distance (55 m) as it is located 31 m from the Borman Road/ Resolution Drive Intersection

• The entrance-ways will be 5.5 m wide • Sight distance onto the 50 kph road

(Borman Road) will be in excess of 90 m • See Appendix 6 for communications

with Hamilton City Council regarding a single access and entrance way

Restricted Discretionary



Activity Object RMA Section

Plan Rules/ Standards

Conditions


• 9 (1) • 16

HCPDP • Rule 4.1.2 • Rule 5.1

• Above ground structures in this Zone must not exceed a volume of 6.5 m3 and any total single dimension of 3 m


Activity will not comply with minimum volume and dimension limits on network utility above ground structure volumes (substation building).

Discretionary


Foundations/ slabs for the: • building • transformers • circuit breakers • disconnectors • other smaller


9 (3)

PWRP • Rule 5.1.4.11 • Rule 5.1.5


• Complies with the Permitted Activity Rule (Soil Disturbance, Roading, Tracking and Vegetation Clearance) because the activities involve land and soil disturbance

• Complies with all Rule 5.1.5 Conditions for Permitted Activity Rule 5.1.4.11 Standards and Terms for Controlled Activity Rules (Accelerated Erosion)

Permitted

Constructing Concrete bund wall • 9 (1) • 16

HCPDP • Rule 3.3.2 • Rule 4.1.2

• Above ground structures in this Zone must not exceed a volume of 6.5 m3 and any total single dimension of 3 m.


The bunding structures will comply with the relevant rules

Permitted

Installing Oil interception & containment facility

• 9(1) • 16

HCPDP Rule 3.3.2(a, ii) Below ground structures for Network Utilities must not exceed 40 m3 in this zone

Structures located below ground will exceed 40 m3

Discretionary





Conditions


9 (3)

PWRP • Rule 5.1.4.11 • Rule 5.1.5


• Complies with the Permitted Activity Rule (Soil Disturbance, Roading, Tracking and Vegetation Clearance) because the activity involves minor earthworks, vegetation clearance and paving an entrance way


Permitted

Laying Subsoil drains • 9 (1) • 16

HCPDP • Standard 3.3.2( a) (i)

• Standard 3.3.2( a) (ii)

• Rule 3.3.1a

• Below ground Network Utilities are a permitted activity

• Volume of underground utility structures must not exceed 40 m3 in this zone

• Storm water pipe to existing infrastructure

• Sewerage to existing infrastructure. • Storage or treatment of stormwater or

sewage will not exceed 50 m3 per day. • Any disturbed land will be reinstated • Volume of drains will not exceed 40 m3

Permitted

Laying Pipes • 9 (1) • 16

HCPDP • Standard 3.3.2( a) (i)

• Standard 3.3.2( a) (ii)

• Rule 3.3.1a

• Below ground Network Utilities are a permitted activity



• Sewerage to existing infrastructure • Storage or treatment of stormwater or

sewage will not exceed 50 m3 per day. • Any disturbed land will be reinstated • Volume of piping will not exceed 40 m3

Permitted

HCPDP Rule 3.3.1 • Below ground Network Utilities are a permitted activity


• The activity involves underground and necessary ancillary structures for network utilities

• Any disturbed land will be reinstated • Volume of cabling will not exceed 40 m3

Permitted

Laying Cables 9 (1)

PWRP • Rule 5.1.4.11 • Rule 5.1.5


• Complies with the Permitted Activity Rule (Soil Disturbance, Roading, Tracking and Vegetation Clearance) because the activity involves minor earthworks, vegetation clearance and paving an entrance way


Permitted





Conditions


Rule 3.3.1a • The utility structure must not exceed 3 m in height in this zone


• Buildings must not exceed 6.5 m3 in volume in this zone

• This is a substation activity in the Residential Zone

• Structure (control / switchgear building) will not meet the maximum height and volume requirements for utility structures in this zone

• Structures which exceed the rule’s size threshold are assessed against the relevant standards of the underlying zone, these standards are listed in the rows below

Discretionary

Rule 4.1.2(b)

Building site coverage must not exceed 40 % of net site area

• Building will occupy approximately 320 m2

• Lot are is in excess of 1200 m2, so the building will not exceed the maximum site coverage

See above

Rule 4.1.2(c)

Building height must not exceed 10 m

Building height will not exceed 10 m See above

Rule 4.1.2(d)

Height planes of 28 degrees (NE to NW) and 45 degrees (all other boundaries) must be maintained starting at a height of 3 m above the boundary

The building will be set back approximately 5 m from the boundary at the rear of the site, and will not exceed 8 m in height (3 m + 45 degrees angle to 5 m setback)

See above

Rule 4.1.2(e) Building must be set back 3 m from the road

Setback will be at least 3 m, see drawings in Appendix 1

See above

Constructing Control/ switchgear building

• 9 (1) • 16

HCPDP

Rule 4.1.2(f)

Building must be set back 1.5 m from all other boundaries besides the road

Setback will be at least 1.5 m, see drawings in Appendix 1

See above

Transporting Equipment • 9(1)

HCPDP N/A N/A No rule in the plan restricts legal vehicle movement to the site along public roads

Permitted





Conditions


Installing

• two transformers • circuit breakers • disconnectors • Indoor & outdoor

switchgear • other smaller


• telecommunication equipment (two antennae)

• 9 (1) • 16

HCPDP Rule 3.3.2a(ii)

• Contractors will be required to meet the construction noise limits in NZS6803P:1984 – The Measurement and Assessment of Noise from Construction, Maintenance and Demolition Work.

• Network Utility Structures in this zone must not exceed 6.5 m3 in volume

• This is a substation activity. • The activity does not comply with the

Network Utility rule relating to structure in the Future Urban Zone because some of these structures exceed 6.5 m3 in volume

Discretionary

Operating/ maintaining/ replacement/ upgrading

• two transformers • circuit breakers • disconnectors • Indoor & outdoor

switchgear • other smaller


• telecommunication equipment

• 9 (1) • 16

HCPDP Rule 3.3 .2c Operation and Maintenance must not result in; increase of voltage capacity of any line, increase in height of any structure, increase in level of non-compliance with Network Utility Standard in the HCPDP, or increase in level of magnetic field levels exceeding international guidelines for 24 hour public exposure

• Activity will comply with relevant rule • Any future activities which are not

permitted will be provided for by the submission of an Outline Plan

Permitted

Using Transformer oil 9 (1) HCPDP Rule 3.2.1 • Transformer oil is a flammable liquid

• The quantity ratio of hazardous substances must not exceed 0.02

The quantity ratio for the site is 3.16 (see HSFP calculation sheet in Appendix 3)

Discretionary

Erecting Security and/ or perimeter fences and gates

9 (1) HCPDP Rule 4.11.1b(ii) • A fence is included in the HCPDP definition of a building

• The fence must not exceed 3 m in height

• The height of the fence will not exceed 3 m

• A security fence may not be required if it is considered that the substation buildings provide adequate security

Permitted

Vehicle parking (cars and vans)

Area 9 (1) HCPDP Table 5.2.3 Plan does not specify that this activity requires a prescribed number of car parks

The activity complies with the parking provisions identified in the plan

Permitted





Conditions


Erecting Sign 9 (1) HCPDP Rule 3.1.3b(iv) • Any sign must not exceed 0.6 m3 in surface area

• Any sign must not have any part above 2 m from the ground

The sign will comply with the relevant rules

Permitted


Night lighting 9 (1) HCPDP Rule 5.4.1b No light may spill to adjoining properties in this zone

• All night lighting will be designed and located so as not to spill beyond the boundaries of the site

• Lighting will be directed down, not up or out from the site

Permitted

HCPDP • Standard 3.3.2 (a) (i)

• Rule 3.3.1a

Storage or treatment of storm water must not exceed 50 m3 per day


• Underground infrastructure • Stormwater will not be stored • Stormwater will not be treated, oil will be

removed from discharge by a stop valve

Permitted

Discharging Stormwater 15 (1)

PWRP • Rule 3.5.11.4 • Rule 3.5.11.5

• Interceptor system must be in place

• No contaminants may enter water

• Interceptor will take all storm-water from the bunded area


• Underground infrastructure

Permitted


• Rule 3.3.1a

Storage or treatment of sewage must not exceed 50 m3 per day

• Sewerage to existing infrastructure • Underground infrastructure

Permitted

Discharging Sewage 15 (1)

PWRP Rule 3.5.7.5

• Sewage must not exceed 1.3 m3 per day

• No direct discharge to water

• Sewerage to existing infrastructure • Underground infrastructure • Single toilet for occasional use only

Permitted


• Rule 3.3.1a

Storage or treatment of drainage must not exceed 50 m3 per day

Storage or treatment of any drainage/ storm water will not exceed 50 m3 per day

Permitted

Discharging Subsoil drainage water

15 (1)

PWRP • Rule 3.5.11.4 • Rule 3.5.11.5

• Interceptor system must be in place

• No contaminants may enter water

• Interceptor will take all storm-water from the bunded area


• Underground infrastructure

Permitted





Conditions


Planting Landscaping 9 (1) HCPDP Rule 5.3.1a The most stringent requirement in the plan is for a 2 m planting buffer strip around the complete boundary of the site

A planting strip of between 2 and 3 meters will be established around the site, within its perimeter

Permitted

WEL Networks Limited: Horsham Downs New Substation Build Appendices


Appendix 1

Site Drawings and Landscaping Plan



Appendix 2

Transformer Noise Predictions



Appendix 3

Oil Containment and Spill Mitigation Procedures



Appendix 4

NFPA Hazard Rating Sheets and HSFP Calculation Sheet



Appendix 5

Mitigation and Magnitude of Electric and Magnetic Fields



Appendix 6

“Electric and magnetic Fields and your Health”



Appendix 7

Substation Access-way Discussion Document



From: Cliff Newton-Smith [mailto:[email protected]] Sent: Tuesday, 13 March 2007 1:37 p.m. To: Phillip Smith Subject: RE: WEL Networks Substation at Rototuna/ Horsham Downs Thanks for the info Phillip. I see no reason to disagree with the access as you have shown it. Regards Cliff Ns -----Original Message----- From: Phillip Smith [mailto:[email protected]] Sent: Tuesday, 13 March 2007 12:04 PM To: Cliff Newton-Smith Subject: RE: WEL Networks Substation at Rototuna/ Horsham Downs

Cliff, Thanks for the response. The width of the access will be 5.5 m which is the upper limit of what is permitted in the residential zone in the District Plan (Table 5.2-3). The distance from the centre of the round-about on Resolution Drive to the southern edge of the proposed access will be approximately 90 m. Regards, Phillip Smith Resource Management Advisor

Unit 4, 274 C Jackson Street, PO Box 33 215, Petone, Lower Hutt 6340. Tel: 04 576 9644 Fax: 04 576 9643 Mob: 027 330 0010 Email: [email protected] www.tec.net.nz

CAUTION: This message and any attachments contain information that is CONFIDENTIAL and may be LEGALLY PRIVILEGED. If you are not the intended recipient any use, disclosure or copying of this email message or attachments is strictly prohibited. If you have received this message in error, please notify us immediately and erase all copies of this message and attachments. Thank you.

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From: Cliff Newton-Smith [mailto:[email protected]] Sent: Tuesday, 13 March 2007 11:49 a.m. To: Phillip Smith Subject: RE: WEL Networks Substation at Rototuna/ Horsham Downs Phillip Could you please supply some more details. I need the dimensions from the centre of the round about to the southern edge of the proposed access, and the width of the access that your require. We will respond as soon as the info comes in. On the face of it your request appears to be satisfactory but we would like to confirm for your benefit. Regards Cliff Newton-Smith -----Original Message----- From: Phillip Smith [mailto:[email protected]] Sent: Tuesday, 13 March 2007 11:35 AM To: Andrew Parsons; Deborah Mckillop Cc: Cliff Newton-Smith; [email protected] Subject: WEL Networks Substation at Rototuna/ Horsham Downs

Andrew, Deborah, (cc Cliff Newton-Smith)

As per our conversation this morning, WEL Networks have asked me to get a written statement from Hamilton City Council (“HCC”), or an agreement in principle, to allow the creation of an entranceway for access onto their proposed substation at Rototuna. The attached PDF diagram shows the basic location of a single accessway, which would meet WEL’s minimum access requirements.

A written statement regarding the suitability of the location of access/ entrance from HCC is needed to allow WEL to continue with the purchase of this land with surety. It is therefore requested that HCC respond as soon as is convenient.

Please note that WEL does not require sign off on the design, and that the written statement does not remove the need for any consents or permits that may be required through legislation or regulation.

Kind Regards,

Phillip Smith Resource Management Advisor

Unit 4, 274 C Jackson Street, PO Box 33 215, Petone, Lower Hutt 6340.

Tel: 04 576 9644 Fax: 04 576 9643 Mob: 027 330 0010 Email: [email protected]

www.tec.net.nz



Appendix 8

Rototuna Structure Plan

Documents

Horsham Downs Substation NoR Issue-1.1