PROPOSED CONDITONS OF CONSENT FROM CONFERENCING 16/02/15

Transcription

1 PROPOSED CONDITONS OF CONSENT FROM CONFERENCING 16/02/15 MANAWATU-WANGANUI REGIONAL COUNCIL DISCHARGE PERMIT GRANTED TO MIDWEST DISPOSALS LIMITED TO DISCHARGE SOLID WASTE TO LAND AND LEACHATE TO GROUND Location Address for activity: Legal description: Wanganui Road, Marton Lot 9, DP2807 Block XIII Whangaehu Survey District, Certificate of Title 221/42 and 212/214; Lot 2, DP Certificate of Title 00/87922 Valuation Number: 13470/ and 13470/ Map Reference: S23: Details of resource consent Granted: Expiry: 35 years Replacing existing consent number: 3286/1 when this new consent is granted. To discharge refuse onto or into land up to 12.7 million cubic metres of airspace, and associated composting operations, at Bonny Glen Landfill, subject to the following conditions. 1. This consent is subject to the General Conditions in Schedule 1 and the specific conditions of this discharge permit. 2. The volume of refuse airspace authorised by this consent is up to 12.7 million cubic metres measured between the landfill liner and the post-settlement cap. 3. The consent holder shall carry out an air space survey of each completed stage/sub stage when it is filled. The air space volume is to be included in the annual report The area of the landfill extension commencing at Stage 8 shall be developed and operated generally in accordance with the Landfill Management Plan described in the General Conditions in Schedule 1 forming part of this consent. Commented [MSC1]: S Standen and M St Clair disagree. Survey is method to show that landfill has been constructed and filled in accordance with limits Prior to commencing activities authorised this consent the Consent Holder shall surrender resource consent 3286/1. 1

2 Landfill Ground Instability 6. The Consent Holder shall carry out annually an engineering geological assessment of the footprint of the landfill extension to identify and mitigate areas of current ground instability. 7. The assessment required by condition 6 shall be carried out by a suitably qualified and experienced geological engineering with a report provided to Manawatu- Wanganui Regional Council within one month of the assessment being carried out. 8. During excavation, the subgrade of the landfill should be regularly monitored by a geotechnical professional. 9. During each stage design, the following stability criteria shall be adopted: Factory of Safety to or greater than 1.5 under static (non-seismic) conditions; Factor of Safety equal to or greater than 1.0 under a 1:250 year AEP seismic event with failure allowed to occur into the soil profile underlying the proposed landfill; and Confirmation that displacement under a 1:500 event will be limited to less than around 300 to 400mm Landfill Design Specifications The landfill liner design shall comprise as a minimum: Commented [MSC2]: R Justice and P Goldsmith Geotechnical Conferencing Statement, Item 3, Conditions 6 and 7, dated 10 Feb 2015 Do not agree. Commented [MSC3]: R Justice and P Goldsmith Geotechnical Conferencing Statement, Item 4, Conditions 8, dated 10 Feb 2015 Do not agree Commented [MSC4]: R Justice and P Goldsmith Geotechnical Conferencing Statement, Item 6 Condition 11 - now 10), dated 10 Feb 2015 Do not agree disagreement of technical nature and unlikely to affect the currently proposed design or the performance or adequacy of the landfill development. a. A 1.5 mm thick high density polyethylene (HDPE) liner, textured both sides; overlying b. A geosynthetic clay liner of permeability not greater than 5 x ms -1 ; overlying c. A prepared high strength uniform proof rolled base grade; or d. An equivalent landfill liner system certified by the Manawatu-Wanganui Regional Council. The landfill liner system shall be constructed in accordance with the synthetic materials manufacturer s recommended quality assurance/ quality control measures. Advisory Note: Alternative liner designs and materials will be considered for acceptance by Manawatu-Wanganui Regional Council prior to the development of a new stage of the landfill where these are demonstrated to provide equivalent or superior performance Within 1 month of the liner being installed and prior to waste being discharged into each constructed stage or sub stage the Consent Holder shall provide to Manawatu- Wanganui Regional Council a statement from a chartered professional engineer experienced and qualified in landfill design and construction that the landfill liner and leachate interception, collection and storage systems complies with the requirements of condition The Consent Holder shall not commence discharging waste into the newly lined areas referred to in Condition 6 of this consent until the Manawatu-Wanganui 2

3 Regional Council s Regulatory Manager has approved the certification by the chartered professional engineer and has recorded/acknowledged the works in writing. This acknowledgement shall be advised in writing within 20 working days and shall not be reasonably withheld. Area of Discharge The discharge of material authorised by this consent shall only occur inside of landfill stages lined and certified in accordance with condition 5 and as shown on Figure 2 of the Fraser Thomas Ltd document entitled Project Description: Project FINAL December 2013 (Attached to this consent) The final discharge footprint of material authorised by this Consent shall not occur outside of the area described as the Landfill Extension Footprint as shown on Figure 5 of the Fraser Thomas Ltd document entitled Project Description: Project FINAL December 2013 (Attached to this consent). Waste Restrictions The Consent Holder shall designate an officer to control entry of waste into the landfill The Consent Holder shall not dispose of waste of an explosive, flammable, reactive, toxic, radioactive, corrosive or infectious nature other than minor quantities of such waste where they are part of and ordinarily found in general waste Further to Condition 11 of this consent, acceptable wastes for disposal are: a. General waste generated from residential, commercial and industrial sources. General waste covers all waste not otherwise defined below. It may contain minor quantities of special or prohibited waste which are normally part of the waste stream; b. Difficult wastes, including offal, dead animal bodies, wire rope, documents and bulky items. Due to their physical nature difficult wastes require special disposal; c. Special wastes, based on an assessment of the nature of the waste and its effects on the landfill and its receiving environment in accordance with the requirements of Condition 11 of this consent. Special wastes contain substances that may adversely affect the final leachate or landfill gas quality. d. Healthcare wastes, as set out in NZS 4304: 2002 Management of Healthcare Waste or any subsequent updates shall be acceptable for disposal at the landfill in accordance with NZS e. Liquid wastes in small containers that are impractical to empty; f. Sludges. Sludge materials have a solids content of a minimum of 20% on a weight basis, unless generated from within the site. g. Leachate or leachate sludge generated from within the site. h. Asbestos that is handled and disposed of in accordance with the Health and Safety in Employment (Asbestos) Regulations 1998 or any subsequent amendments. i. Solid wastes that meet the Appendix A: Total concentration or leachability limits for Class A landfills in Module 2 Hazardous Waste Guidelines: Landfill Waste Acceptance Criteria and Landfill Classification, MfE (2004), or any subsequent update Wastes not acceptable for disposal at the landfill are: 3

4 a. Liquid wastes, other than those described in Condition 12(e) and 12(g) above; and b. Hazardous waste, other than those asbestos containing materials described in Condition 12(h) above The Consent Holder shall maintain a record of the quantities and types of refuse accepted and declined at the landfill to demonstrate compliance with conditions 11, 12 and 13. A copy of this record shall be forwarded to the Manawatu-Wanganui Regional Council by August 31 of each year, unless otherwise agreed in writing. Advisory Note: Information provided as part of this condition may be subject to commercial sensitivity and therefore is not to be released under LGOIMA The Consent Holder shall keep a record of the location of all special waste burials in accordance with the Special Waste Acceptance Protocol forming part of the Landfill Management Plan. A copy of these records shall be made available to Manawatu- Wanganui Regional Council at any reasonable time upon request and provided in the Annual Report The Consent Holder shall only accept wastes by prior arrangement, either through standing arrangements for transfer stations and other commercial waste operations, or a special arrangement for individual consignments made in advance of disposal Prior to contracting to accept waste from a location where animal tuberculosis is endemic, the Consent Holder shall ensure that the nature of the transfer stations, waste containers and general waste acceptance and transport procedures in that location will minimise the risk of possible infected animals being brought to the landfill Where waste is rejected because it does not meet the requirements of Conditions 11, 12 and 13 of this Consent, the Consent Holder shall: a. Record whatever details are known of the waste, including type, volume, who transported it and their details, its source and intended destination; and b. Advise the Manawatu-Wanganui Regional Council within 48 hours via the pollution hotline on Exposed Refuse The uncovered areas of the working face shall be kept to a practicable minimum consistent with that required for practical operational purposes and as may be required for the safe operation of plant and equipment relevant to the portion of the landfill being filled. All necessary steps shall be taken to minimise odour and dust emissions. For the purposes of this condition, the working face is defined as the area on to which refuse is compacted.the amount of exposed refuse at any one time shall be no more than 1,000 square metres by 1 metre deep. Daily Cover Commented [MSC5]: Conference Statement A Curtis & D Ryan signed 3 Feb Page 6 Agreed - Depth component could be removed. Not agreed area of working face. Commented [MSC6]: P Mullinger Evidence Pages 27 29, paras 116 to Daily cover shall be placed over the entire working face by the end of each operating day. Daily cover may be 150 mm of soils or clays generated on site or imported, but 4

5 may also be one of a number of non-soil alternate daily cover (ADC) options of an appropriate thickness where it can be demonstrated that they achieve a comparable level of control with respect to air discharges, vermin, birds and litter. Intermediate Cover Intermediate cover shall be placed over daily cover to close-off a fill area that will not receive additional lifts of waste or final cover for more than 3 months. The combined depth of cover, including daily cover, over the waste for Intermediate cover surfaces shall be a minimum of 300mm thick. Intermediate cover shall be stabilised to comply with 14 and 15 of Resource Consent Final Cover and Closure The Consent Holder shall: a. Ensure the final landform, following the completion of settlement, meets RL heights, extent of filling, final batter slopes and other parameters as shown on Figure 2 of the Fraser Thomas Ltd report entitled Design Report Project FINAL December 2013 forming part of the conditions of this Consent in accordance with Condition 1 of Schedule 1 of this consent; b. Ensure that the landfill final cover comprises, from top to bottom: i. 200mm thick topsoil ii. 700mm of subsoil; overlying iii. A 300 mm thick granular fugitive gas collection layer which will be connected to the gas collection system; overlying iv. A 600 mm thick conventional compacted clay soil cap compacted to a permeability no greater than 1 x 10-7 ms -1. c. Ensure that the landfill final cover described in Condition 22(b) is underlain with intermediate cover of 300 mm depth. Detailed design for the final cover shall be forwarded to the Manawatu-Wanganui Regional Council 6 months prior to any stage final capping works commencing. d. Ensure that those parts of the landfill which will not be filled over for a period of three years or more will be temporarily capped with a minimum 500 mm thick layer of compacted clay soil and a 100 mm thick topsoil layer, overlying 300 mm thickness of intermediate cover, and be grassed. e. Achieve a final post settlement slope of not steeper than 1V : 3H (1 in 3) on any face, except that the overall post settlement slope of both eastern and western faces shall be no steeper than 1V : 4H. All slopes shall be vegetated with pasture and/or plants so as to minimise erosion potential The Consent Holder shall within one month following post settlement completion and remediation of any part of the landfill report on its compliance with Condition 22 of this consent in writing to the Manawatu-Wanganui Regional Council The Consent Holder shall undertake an inspection of the intermediate and final cover areas of the landfill site within five working days following significant storm events (greater than 50% AEP at a duration of less than 1 day), but at least every six months. The inspection shall check for: 5

6 a. Vegetation die off; b. Cracking of the landfill final cover; c. Subsidence and erosion; d. Leachate breakout through the final cover; Any defects noticed during the inspection shall be remedied immediately. A report on the inspection and details of any remedial actions undertaken as a result shall be forwarded to the Manawatu-Wanganui Regional Council within one month of each inspection. Groundwater Monitoring Requirements The Consent Holder shall prepare a Groundwater Management Plan (GMP) for the landfill extension. The GMP shall include but not be limited to: a. Schedule A bores (Attached to this consent); b. The method of bore construction, piezometer installation (including testing carried out in piezometers) and bore decommissioning; c. The location of monitoring bores on a plan of a suitable scale; d. The methods and frequency for groundwater monitoring; e. Baseline monitoring requirements; f. Operational monitoring requirements; g. Groundwater trigger levels; h. Procedures to follow in the event of trigger levels being exceeded; i. Contingency plans for remedial action should monitoring results show that leachate is contaminating groundwater; and j. Reporting requirements. The Consent Holder shall submit the GMP one month prior to the commencement of baseline groundwater monitoring to the Manawatu-Wanganui Regional Council s Regulatory Manager for certification Subject to Conditions 25 and 27, the Consent Holder shall install and maintain the groundwater monitoring bores proposed in the GMP for the period of monitoring specified by this consent. If any bores are damaged or become inaccessible then they should be replaced. Alternative locations for any replacement bores require written approval of Manawatu-Wanganui Regional Council s Regulatory Manager BG1 and BG6 bores are to be monitored until the immediately surrounding area is prepared for landfill development. As part of landfill base grade preparation works, both bores are to be decommissioned Bores BG10A, B and C will be extended through the piggy back liner over Stage 1 in 150 mm diameter HDPE with overlapping welded boot seals at the HDPE liner and are to be monitored as long as access to those bores can be practically maintained, recognising that the clay buttress fill at the eastern end of the site may make continuity impractical. Best endeavours will be undertaken to maintain these bores during construction works The Consent Holder shall carry out baseline groundwater monitoring prior to the placement of refuse in the extension area. The baseline monitoring shall be carried 6

7 out every three months over a twelve month period and include groundwater levels and inorganic and organic groundwater quality parameters The Consent Holder shall carry out operational groundwater monitoring during the placement of refuse within the extension area. The following operational monitoring is required: a. Six monthly monitoring of: Groundwater level ph (field and laboratory) Conductivity (field and laboratory) Ammoniacal nitrogen Chloride Boron (soluble) b. 24 monthly monitoring of: Groundwater level ph (field and laboratory) Conductivity (field and laboratory) Suspended solids Alkalinity Nitrate nitrogen, ammoniacal nitrogen, total Kjeldahl nitrogen Dissolved reactive phosphorus Sulphate, bicarbonate Calcium, magnesium, potassium, sodium, chloride Chemical oxygen demand (COD), biological oxygen demand (BOD 5) Aluminium, arsenic, cadmium, chromium, copper, iron, manganese, nickel, lead, zinc, boron, cobalt (all soluble) Organics (semi-volatile and volatile organic compounds) The Consent Holder is to adopt the following groundwater quality triggers: a. Alert trigger: Based on baseline mean values plus three standard deviations. b. Alarm trigger: ANZECC 80% level of protection for freshwater from ANZECC (2000). NZDWS Maximum Acceptable Values (MAV) for health from Ministry of Health (2008). Waste Monitoring Requirements The Consent Holder shall record: a. Quantity of refuse accepted at the landfill; b. The volume of leachate produced; and c. Quantity and description of any Difficult waste, Special waste or Sludge (as defined in Condition 12) accepted. 7

8 The records shall be made available to Manawatu-Wanganui Regional Council staff on request and included in the Annual Report Records referred to in Condition 32 of this Consent shall not, without the written approval of the Consent Holder, be released to any party other than Manawatu- Wanganui Regional Council and Rangitikei District Council The Consent Holder shall: a. Visually inspect the landfill for leachate break out, settlement, intermediate/final cover erosion and other adverse environmental effects at least once fortnightly until such time as discharge of refuse to the landfill ceases. Thereafter, the frequency of inspection shall be determined in consultation with the Manawatu-Wanganui Regional Council. b. Record: i. the date and time of visual inspection; ii. observations made during the visual inspection; and iii. any remedial action that is necessary as a result of the visual inspection. c. The records referred to in Condition 34b shall be made available to the Manawatu-Wanganui Regional Council on request and included in the Annual Report. Leachate Monitoring 40. The Consent Holder shall ensure the operation and maintenance of the leachate collection and storage system does not result in any direct discharge onto or into land. 41. The Consent Holder shall ensure the operation and maintenance of the leachate collection and storage system does not result in any direct discharge into the stormwater network. 42. The Consent Holder shall ensure the operation and maintenance of the leachate collection and storage system does not result in any direct discharge beyond the property boundary. Annual Report 43. The Consent Holder shall prepare an Annual Monitoring Report. This report shall cover landfill discharge activities provided for in this consent for the year ending 30 June and shall be forwarded to the Manawatu-Wanganui Regional Council by 31 August. The report shall include: a. All groundwater quality information, which should be compiled and compared to alert and alarm trigger levels. b. The waste monitoring records described in Condition 31 and other monitoring requirements of this Resource Consent. Lapse of Consent 8

9 44. This resource consent lapses on the expiry of five years after the date of commencement of this consent unless the consent is given effect to or other criteria contained within Section 125 of the Resource Management Act 1991 are met. Review Advice Note: Earthworks required to prepare the land for the receipt of solid waste is not covered by this resource consent. (Refer to Land Use Consent ) 45. The Manawatu-Wanganui Regional Council may, under section 128 of the Act, initiate a review of all conditions of these consents in February 2016 and every two years thereafter. The review shall be for the purpose of reviewing the effectiveness of the conditions in avoiding, or mitigating any adverse effects on the environment, which may arise as a result of the exercise of these consents. The review may be necessary to: delete or change any conditions of these resource consents to ensure adverse effects are appropriately mitigated; or addition of new conditions as necessary, to avoid, remedy or mitigate any unforeseen adverse effects on the environment; or if necessary and appropriate, the adoption of the best practicable options to avoid, remedy or mitigate any adverse effects on the environment. 9

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