RESOURCE CONSENT CRC175273

RESOURCE CONSENT CRC175273

The Canterbury Regional Council (known as Environment Canterbury)

GRANTS TO: Christchurch City Council

A DISCHARGE PERMIT (S15): To discharge construction phase stormwater and dewatering water.

COMMENCEMENT DATE: 27 Apr 2017

EXPIRY DATE: 27 Apr 2019

LOCATION: 239 Gardiners Road, Harewood, Christchurch

SUBJECT TO THE FOLLOWING CONDITIONS:

Limits

1 _{The discharge shall be only:}

a) sediment laden stormwater from exposed areas; and b) dewatering water

during the construction of a water pump station at 239 Gardiners Road, Harewood, legally defined as Section 1 SO 496002 and Section 2 SO 496002, at or about map reference NZ Topo50 BX24:6670-8716 as shown on Plan CRC175273, attached to and forming part of this resource consent.

2 _{Construction phase stormwater and dewatering water shall be discharged via a}

land based treatment train to the Styx River. The treatment train shall include but not be limited to;

a) Settlement tanks/ponds; b) Vegetated buffer strips;

c) Use of the existing swale and wetlands following settlement of sediment; or

d) Equivalent sediment removal methods detailed in the site Erosion and Sediment Control Plan.

3 _{The concentration of total suspended solids in the discharge to the Styx River shall}

not exceed 50 g/m3.

4 Stormwater generated within the site from all rainfall events up to and including a 24 hour duration 2 percent annual exceedance probability rainfall event shall be retained on site and shall not discharge into any surface waterway without treatment detailed in Condition (2).

Prior to the Commencement of Works

5 _{Prior to the works described in Condition (1) the consent holder shall ensure that all}

personnel working on the site are made aware of and have access to the contents of:

a) This consent document;

b) Excavation land use consent CRC175275; and

c) Groundwater take for site dewatering purposes water permit CRC175274.

Erosion and Sediment Control

6 _{The discharge shall occur in accordance with an Erosion and Sediment Control}

Plan (ESCP) which shall detail the sediment control measures that will be taken to ensure compliance with the conditions of this consent. The consent holder shall prepare the ESCP in accordance with:

a) Environment Canterbury’s "Erosion and Sediment Control Guidelines for the Canterbury Region" Report No. CRC R06/23, February 2007 (ESGC), or any updates to this document; or

b) An equivalent industry guideline. If an alternative guideline is used, the ESCP shall provide details of the relevant alternative methods used and an explanation of why they are more appropriate than the ESCG.

7 The ESCP shall include, but not be limited to: a) A map showing the location of all works;

b) Detailed plans showing the location of sediment control measures, on-site catchment boundaries, and sources of runoff;

c) Drawings and specifications of designated sediment control measures; d) A programme of works, which includes but is not limited to, a proposed

e) The management of stockpiled soils during excavation works; f) Inspection and maintenance of the sediment control measures; g) Sampling procedures and protocols;

h) Defined discharge points where stormwater leaves the site;

i) The description of best practicable options to be applied to mitigate sediment discharge beyond the site boundary;

j) The method(s) for stabilising the site if works are abandoned; and k) The method(s) for stabilising the site and decommissioning erosion and

sediment control measures after works have been completed.

8 The ESCP shall be submitted to the Canterbury Regional Council, Attention: Regional Leader - Monitoring and Compliance, at least ten working days prior to earthworks commencing, for certification that it complies with the conditions of this consent.

a) The discharge shall not commence until the consent holder has received the certification from the Canterbury Regional Council that it consistent with the conditions of this consent.

b) Notwithstanding Condition (a), if the consent holder has not received the certification within ten working days of the Regional Leader - Monitoring and Compliance receiving the ESCP, the discharge may commence.

9 _{The Erosion and Sediment Control Plan may be amended at any time. Any}

amendments shall be:

a) For the purpose of improving the efficacy of the erosion and sediment control measures, and shall not result in reduced discharge quality; b) Consistent with the conditions of this resource consent; and

c) Submitted in writing to the Canterbury Regional Council, Attention: Regional Leader - Monitoring and Compliance, prior to any amendment being

implemented.

10 _{During construction of the Water Pump station , the consent holder shall take all}

practicable measures to prevent the discharge of sediment-laden stormwater into any part of the stormwater system for the developed site, or into any water race, or outside the boundaries of the site. Measures shall include but not be limited to:

a) The installation of structures to intercept run-off to divert clean water from the construction areas and to control sediment-laden water;

b) The installation of site perimeter controls or sediment fences to separate the site from adjacent boundaries and any surface waterways;

c) The location of any stockpiles of material inside the site perimeter controls; d) The installation of stabilised entry and exit points; and

e) Restricting the maximum area of unsealed/unconsolidated surfaces to two hectares at any one time.

Inspections and Maintenance

11 _{Erosion and sediment control measures shall be inspected and maintained by the}

Consent Holder at least once per week. A record of the inspections shall be kept in a log book and provided to the Canterbury Regional Council on request.

12 _{The consent holder shall inspect any cut-off drains, bunds, or storage and soakage}

areas after each rainfall event and remove any sediment accumulation if greater than 200 millimetres in depth.

13 All exposed surfaces shall be stabilised once earthworks are complete or if the exposed area is not to be earthworked for a period of 14 days or more.

14 Erosion and sediment control measures shall not be decommissioned until the catchment requiring those measures is stabilised and the permanent stormwater system is operational.

Abandonment

15 If the consent holder abandons work on-site, they shall first take adequate preventative and remedial measures to control sediment discharges, and shall thereafter maintain those measures for so long as necessary to prevent erosion or sediment discharges from the site.

Decommissioning

16 The erosion and sediment control measures shall not be decommissioned until the site is stabilised and the stormwater system for the developed site is functioning.

17 Once construction of the site has ceased:

a) Decommissioning of sediment and erosion control measures shall be

undertaken. Decommissioning shall be only undertaken when dry weather is forecast for a period suitable to allow decommissioning to be carried out without rainfall occurring and all disturbed areas are stabilised.

b) Any visible debris, litter, sediment and hydrocarbons shall be removed from all sediment control measures.

Administration

18 _{The Canterbury Regional Council may, once per year, on any of the last five}

working days of March and September, serve notice of its intention to review the conditions of this consent for the purposes of:

a) Dealing with any adverse effect on the environment which may arise from the exercise of the consent ; or

b) Requiring the adoption of the best practicable option to remove or reduce any adverse effect on the environment.

Issued at Christchurch on 28 April 2017 Canterbury Regional Council

Canterbury Maps, Env ironment Canterbury

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Land Information New Zealand;

Map Created by Canterbury Maps on 1:43: 20 p.m.

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Rivers and Streams Lak es, Ponds and Reservoirs Canals and Water Rac es 1:50,000 Topom ap River and Stream lines Rivers and Streams Canals and Water Rac es Drains Regional Boundaries Territorial Authority Boundaries Land Parcels Land Parcel State highway s outs ide Canterbury Site: 239 Gardiners Road, Section 1 SO 496002 and Section 2 SO 496002, NZ Topo50 BX24: 6670-8716

Exercising of resource consent CRC175273

It is important that you notify Environment Canterbury when you first

start using your consent.

GRANTED TO: Christchurch City Council

A DISCHARGE PERMIT (S15): To discharge construction phase stormwater and dewatering

water.

LOCATION: 239 Gardiners Road, Harewood, Christchurch

Even if the consent is replacing a previous consent for the same activity, you need to complete and return this page.

Providing this information will:

• Validate your consent through to its expiry date

• Minimise compliance monitoring charges

• Help provide an accurate picture of the state of the environment.

If consent CRC175273 is not used before 28 Apr 2019 this consent will lapse and no longer be valid.

Declaration:

I have started using this resource consent.

Action taken: (e.g. pasture irrigated, discharge from septic tank/boiler/spray booth etc).

___________________________________________________________________________________________ Approximate start date (Note: this may be different to the date the consent was granted):: ____________________

Signed: __________________________________________ Date: _________________________________ Full name of person signing (please print): ____________________________________________________

Please return to:

Environmental Protection - Administration Environment Canterbury

PO Box 345 Christchurch 8140