Brett Sheldon
Proposed Dwelling & Onsite Wastewater Disposal 18 Deeming Road, Okiato
Williams & King, Kerikeri1 2 July 2020
1 Williams & King - a Division of Survey & Planning Solutions (2010) Ltd Surveyors, Planners, Resource Managers - Kerikeri and Kaitaia PO Box 937 Kerikeri Phone (09) 407 6030 Email: [email protected] 1.0 Overview The Applicants, Brett Sheldon and Fleur Aspen, propose a new dwelling at 18 Deeming Road, Okiato, in the Coastal Residential Zone. The new dwelling will be located within twenty metres of a vegetated area on the downslope side of the subject site. Clearance of indigenous vegetation is required to prepare the building site. Wastewater will be treated and disposed on site, and the proposed system requires a discharge consent and land use consent due to the site constraints (size and position in relation to the coastal marine area).
The application site is zoned Coastal Residential in the District Plan. This application has been assessed as being a discretionary activity overall.
2.0 Description of Proposal Proposed Dwelling A new single bedroom dwelling is proposed, with the majority of the indoor area comprising a single level, and an internal staircase accessing a lower deck area and stairs accessing a higher car port via a covered deck. The floor area of the dwelling comprising the stair well and level 2 building area amounts to 101.6m². Deck areas amount to 84.6m² (note that the lower level deck is situated below the level 2 building). The carport will be 22.4m² and is accessed by a new driveway beyond the vehicle access to the existing shed.
A shed that is under construction (having already received a building consent) is also shown on the plans, as having a toilet and shower added. This will be included in the building consent application for the new dwelling.
The maximum height of the building is approximately 7.6m, as shown on Elevation 1 (refer to Appendix 1).
Exterior materials comprise pre-painted steel roofing and a combination of pre-painted steel and rusticated cedar weatherboard cladding.
Refer to the development plans in Appendix 1.
Earthworks Minimal excavation will be required to cut and retain the site in the location of the carport, driveway and upper deck area (approximately 25m³), and to cut, retain and batter the level 1 platform (approximately 65m³). A Temporary Site Sediment Control Plan is attached in Appendix 1.
Vehicle Access & Parking Vehicle access to the new dwelling will use the driveway being formed for the existing shed, directly off Deeming Road. Car parking will be available in the existing shed and proposed car port.
Wastewater, Water Supply & Stormwater Management The site is not serviced in terms of sanitary sewer and a new onsite wastewater system will be installed. Refer to the Waterflow NZ Onsite Wastewater Design Report in Appendix 2.
Water supply for domestic use and firefighting will be provided by two 25,000 litre water tanks on the site.
Total impermeable surfaces will occupy approximately 380m².
SHELDON – DEEMING ROAD 3.0 Application Site Details and Description Record of Title: NA24D/799 (refer to Appendix 3). Appellation: Lot 3 Deposited Plan 64099 Title Area: 1093m² more or less Address: 18 Deeming Road, Okiato Relevant Record of Title Interests: Nil (there is a private covenant recorded on the title – Land Covenant in Transfer 219016.
The property is located at 18 Deeming Road in Okiato, overlooking Veronica Channel. Refer to the location maps below. The site slopes down from Deeming Road towards the coastal marine area to the north-west. It is currently in grass with regenerated Manuka scrub in the northern western part of the site, becoming denser at the lower and steeper part of the site.
Building consent has been issued for the ‘Existing Shed’ shown on the Site Plan, and work has commenced.
The subject site’s south eastern boundary has direct frontage to Deeming Road. The site’s north western boundary also adjoins legal road reserve, which separates the property from Veronica Channel.
Photographs are presented in Appendix 4.
Figure 1: Location Map
SHELDON – DEEMING ROAD
Figure 2: Cadastral Map
4.0 District Plan Activity Status 4.1 Coastal Residential Zone The proposal complies with the following relevant permitted activity standards:
Residential Intensity Rule 10.8.5.1.2 does not limit the use of an existing site for a single residential unit for a single household, provided that all other standards for permitted activities are complied with. Our interpretation of this rule in relation to the proposal is that the existing site can be developed for a single residential unit, while the resultant breach of District Wide rules can be dealt with as a separate rule breach. It is therefore considered that the proposal complies with the permitted standard.
Scale of Activities The use of the proposed residential dwelling will comply with permitted activity rule 10.8.5.1.3.
Building Height Rule 10.8.5.1.4 limits building height to 8m – the maximum height of the building is less than this in compliance with this rule.
SHELDON – DEEMING ROAD Sunlight Rule 10.8.5.1.5 requires that no part of any building project beyond a 45 degree recession plan as measured inwards from any point 2m above the ground level on any site boundary, and where a site boundary adjoins a legally established entrance strip, private way, access lot, or access way serving a rear site, the measurement shall be taken from the farthest boundary. The proposal complies with this permitted standard, as indicated on the Elevation Plans within Appendix 1.
Stormwater Management Permitted activity Rule 10.8.5.1.6 limits impermeable surfaces to 50% or 1,000m² of the gross site area, whichever is the lesser. In this case 50%, or 546.5m². The cumulative amount of impermeable surfaces proposed will be approximately 379.1m², in compliance with this rule.
Setback from Boundaries Permitted activity Rule 10.8.5.1.7 requires a minimum building setback of 3m from road boundaries, and 1.2m from other boundaries (with no set-back required for a maximum total length of 10m along any one such boundary). Furthermore, no less than 50% of the area between the road boundary and a parallel line 2m therefrom is required to be landscaped.
As indicated on the site plan, the proposed building achieves setbacks exceeding 1.2m in relation to the north eastern and south western boundaries, with the exception of the low retaining wall behind the proposed car port, which will comply with the exemption.
Building Coverage Permitted activity Rule 10.8.5.1.16 limits building coverage of a site to 45% of the gross site area or 900m², whichever is the lesser. In this case, 45% is the lesser amount, equating to 491.85m². The building coverage will comply with this standard.
4.2 District Wide Provisions Natural and Physical Resources Compliance with the following relevant rules is assessed below.
12.2.6.1.4 and 12.2.6.1.1(n): The site already has 500m² of cleared land. Approximately 120m² of vegetation clearance will be required. Comparison of the current extent of vegetation on the site with aerial photographs from 2009 and 2010 shows that the bush line has remained much the same. As such, consent is required in terms of restricted discretionary activity Rule 12.2.6.2.2 (Indigenous Vegetation Clearance in Other Zones). The matters that Council will restrict the exercise of its discretion to are commented on in Section 6.0 of this Report.
12.3.6.1.3 Excavation and/or filling in the …. Coastal Residential Zone This rule allows excavation and/or filling within the Coastal Residential Zone provided that it does not exceed 200m³ and does not involve a cut or filled face exceeding 1.5m in height. The definition of cut or fill face excludes any face of a height greater than 1.5m but no greater than 3m which is to be retained by a property engineered retaining wall and for which a building consent has been issued. The proposed earthworks will not exceed 200m³ in volume (taking into account the 50m³ excavation for the existing shed). Therefore, the proposal is considered to comply with the permitted activity standard for earthworks.
SHELDON – DEEMING ROAD 12.4.6.1.2(a) Fire Risk to Residential Units Rule 12.4.6.1.2(a) requires residential units to be located at least 20m away from the drip line of any trees in a naturally occurring or deliberately planted area of scrub or shrubland, woodlot or forest. The new dwelling will be located less than 20m from the area bush on the north western portion of the property, with the separation distance being approximately 1.5 – 2.0m (refer to the site plan).
This aspect of the application will be a discretionary activity under Rule 12.4.6.3. The relevant Assessment Criteria are addressed in Section 6.0 of this Report.
12.7.6.1.1(b) Setback from … the Coastal Marine Area: This rule requires any building and impermeable surface to be setback a minimum of 26m from the listed water bodies in the Coastal Residential Zone. The proposed dwelling will comply with this rule – refer to the Site Plan.
12.7.6.1.4(b) Land Use Activities Involving Discharges of Human Sewage Effluent: This rule requires land use activities which produce human sewage effluent, where the effluent is treated and disposed of on–site such that each site has its own treatment and disposal system, to be located no closer than 30m from the boundary of the coastal marine area. The proposed land application disposal area will be a minimum of 20m (but less than 30m) from the coastal marine area and is therefore unable to comply with this rule - this will be a discretionary activity pursuant to Rule 12.7.6.3. The relevant criteria set out in 12.7.7 are addressed within Section 5.0.
Transportation
The proposal complies with the following relevant permitted activity standards:
Traffic 15.1.6A.2.1 / Table 15.1.6A.1 Traffic Intensity: The first residential unit on a site is exempt from this rule, as is construction traffic associated with the establishment of an activity
Car Parking 15.1.6B.1.1 On-Site Car Parking Spaces: Two car parking spaces are provided for the proposed building.
15.1.6B.1.5 Car Parking Space Standards: Car parking spaces will be provided in accordance with the permitted standard, within the existing shed under construction and a proposed car port.
Vehicle Access 15.1.6C.1: Vehicle access to the site off Deeming Road will be completed compliance with Rule 15.1.6C.1.
4.3 Overall Activity Status Overall, the proposed activity will be a discretionary activity in terms of the District Plan provisions.
SHELDON – DEEMING ROAD 5.0 Proposed Regional Plan for Northland Activity Status 5.1 Proposed Regional Plan for Northland The attached on-site wastewater treatment and disposal system is subject to rule C.6.1. The Onsite Wastewater Design Report summarises compliance with the permitted activity standard, and indicates that the proposed onsite wastewater system does not comply with clauses 5(d) and 9(a) and (b) relating to the inclusion of a 10m down slope buffer area from the lowest irrigation line and reserve disposal area. As such, the proposed onsite wastewater disposal system is a discretionary activity under Rule C.6.1.5.
6.0 Assessment of Environmental Effects
Clauses 6 and 7 of Schedule 4 of the RMA indicate the information requirements and matters that must be addressed in or by an assessment of environmental effects, both of which are subject to the provisions of any policy statement or plan. The relevant criteria and matters listed under sections 12.2.6.2.2, 12.4.7 and 12.7.7 are also addressed in the following assessment.
6.1 Water Quality Relevant Assessment Criteria - 12.7.7 (a) the extent to which the activity may adversely affect cultural and spiritual values: (c) the extent to which the activity may exacerbate or be adversely affected by natural hazards: (d) the potential effects of the activity on the natural character and amenity values of lakes, rivers, wetlands and their margins or the coastal environment: (e) the history of the site and the extent to which it has been modified by human intervention: (f) the potential effects on the biodiversity and life supporting capacity of the water body or coastal marine area or riparian margins; (g) the potential and cumulative effects on water quality and quantity, and in particular, whether the activity is within a water catchment that serves a public water supply: (h) the extent to which any proposed measures will mitigate adverse effects on water quality or on vegetation on riparian margins: (i) whether there are better alternatives for effluent disposal; (j) the extent to which the activity has a functional need to establish adjacent to a water body:
The Onsite Wastewater Design Report includes an assessment of environmental effects. In relation to surface and ground water, the assessment outlines that wastewater will be treated to a high standard prior to discharge, and that discharge visa a proposed irrigation system with a very conservative application rate to reduce the likelihood of any breakout or runoff or any risk of surface water or groundwater contamination. The risks to water quality have been assessed as being minor to nil. The western boundary of the subject site is at least 20m from the edge of the coastal marine area, and this vegetated area provides an adequate buffer to avoid any treated wastewater reaching the estuary shore. The proposed wastewater system has been designed following investigation of site and soil conditions and has been selected as the best practicable option, given the site constraints, to avoid adverse effects on water quality. The erosion and sediment control measures shown on the ‘Temporary Site Sediment Control’ plan will prevent any soil or sediment from being transported downslope beyond the property boundary. The implementation of this can be monitored by the nominated contractor. Overall, and subject to the recommendations of the Onsite Wastewater Design Report, and implementation of erosion and sediment control prior to earthworks, it is considered improbable that an adverse effect on water quality of Veronica Channel will occur.
SHELDON – DEEMING ROAD 6.2 Natural Hazards Relevant Assessment Criteria - 12.4.7 (j) in respect of fire risk to residential units: (i) the degree of fire risk to dwellings arising from the proximity of the woodlot or forest and vice versa; and (ii) any mitigation measures proposed to reduce the fire risk; and (iii) the adequacy of the water supply; and (iv) the accessibility of the water supply to fire service vehicles. 50,000 litres of water will be stored in buried concrete tanks. These will be positioned so that they are accessible to fire-fighting vehicles. The Russell Fire Station is located in Russell Township, approximately 7.5km away.
The proposed dwelling will have a pre-painted steel roof and a combination of pre-painted steel and cedar rusticated weatherboard cladding. Refer to the Elevation Plans. The steel roof material will mitigate the risk of fire.
In summary, the risk of fire is considered to have been alleviated, such that it will not be more than minor.
6.3 Ecological Effects 12.2.6.2.2 INDIGENOUS VEGETATION CLEARANCE IN OTHER ZONES (a) the significance of the area assessed using the criteria listed in Method 12.2.5.6; and (b) the extent to which adverse effects on areas of significant indigenous vegetation and significant habitats of indigenous fauna are avoided, remedied or mitigated; and (c) the extent to which any proposed measures will result in the protection and enhancement of the ecological values of the area; and
The vegetation includes regenerating manuka, which is a threatened species due to the myrtle rust outbreak. In this respect, it does have some significance, although the site is not part of a recorded natural area in the ‘Natural areas of Whangaruru Ecological District’ report2. The minimum necessary vegetation is proposed to create the building platform and achieve a suitable separation between the building and vegetation. The house is modest in footprint and will partly occupy an already cleared area of the site, which has reduced the need for excessive vegetation clearance. The remaining vegetation on the site will continue to link with the vegetation on the paper road to the north west. Overall, the extent of vegetation clearance is considered to be appropriate in this coastal residential environment, and adverse effects will be less than minor.
6.4 Visual and Amenity Values 12.2.6.2.2 INDIGENOUS VEGETATION CLEARANCE IN OTHER ZONES (d) the extent to which the activity may adversely impact on visual and amenity values; and Vegetation will be retained downslope from the developed area of the site, and this will link with vegetation on the paper road below and on adjacent private properties to soften and filter the view of the new structure from the coastal marine area and maintain visual and amenity values.
2 Booth. A (2005): Natural areas of Whangaruru Ecological District. Reconnaissance Survey Report for the Protected Natural Areas Programme. Department of Conservation, Whangarei, New Zealand.
SHELDON – DEEMING ROAD 7.0 Statutory Assessment 7.1 Objectives and Policies
7.1.1 New Zealand Coastal Policy Statement The proposal supports Policy 13 – Preservation of Natural Character – by consolidating the new dwelling within an existing coastal settlement, positioning the building and driveway on a cleared area, and maintaining vegetation to the extent possible between the building site and the coastal marine area.
7.1.2 Far North Operative District Plan Relevant objectives and policies related to the Coastal Residential Zone and Natural Hazards are commented on below. It is considered that the proposal will be compatible with the applicable strategies.
Coastal Environment 7.3 OBJECTIVES 10.3.1 To manage coastal areas in a manner that avoids adverse effects from subdivision, use and development. Where it is not practicable to avoid adverse effects from subdivision use or development, but it is appropriate for the development to proceed, adverse effects of subdivision use or development should be remedied or mitigated. 10.3.2 To preserve and, where appropriate in relation to other objectives, to restore, rehabilitate protect, or enhance: (a) the natural character of the coastline and coastal environment; (b) areas of significant indigenous vegetation and significant habitats of indigenous fauna; (d) the open space and amenity values of the coastal environment; (e) water quality and soil conservation (insofar as it is within the jurisdiction of the Council). 10.3.3 To engage effectively with Maori to ensure that their relationship with their culture and traditions and taonga is identified, recognised, and provided for. 10.3.8 To ensure provision of sufficient water storage to meet the needs of coastal communities all year round. 7.4 POLICIES 10.4.1 That the Council only allows appropriate subdivision, use and development in the coastal environment. Appropriate subdivision, use and development is that where the activity generally: (a) recognises and provides for those features and elements that contribute to the natural character of an area that may require preservation, restoration or enhancement; and (b) is in a location and of a scale and design that minimises adverse effects on the natural character of the coastal environment; and (c) has adequate services provided in a manner that minimises adverse effects on the coastal environment and does not adversely affect the safety and efficiency of the roading network; and (d) avoids, as far as is practicable, adverse effects which are more than minor on heritage features, outstanding landscapes, cultural values, significant indigenous vegetation and significant habitats of indigenous fauna, amenity values of public land and waters and the natural functions and systems of the coastal environment; and (e) promotes the protection, and where appropriate restoration and enhancement, of areas of significant indigenous vegetation and significant habitats of indigenous fauna; and (f) recognises and provides for the relationship of Maori and their culture and traditions with their ancestral lands, water, sites, waahi tapu and other taonga; and (h) gives effect to the New Zealand Coastal Policy Statement and the Regional Policy Statement for Northland. 10.4.2 That sprawling or sporadic subdivision and development in the coastal environment be avoided through the consolidation of subdivision and development as far as practicable, within or adjoining built up areas, to the extent that this is consistent with the other objectives and policies of the Plan. 10.4.3 That the ecological values of significant coastal indigenous vegetation and significant habitats are maintained in any subdivision, use or development in the coastal environment. 10.4.9 That development avoids, where practicable, areas where natural hazards could adversely affect that development and/or could pose a risk to the health and safety of people. 10.4.10 To take into account the need for a year-round water supply, whether this involves reticulation or on-site storage, when considering applications for subdivision, use and development. 10.4.11 To promote land use practices that minimise erosion and sediment run-off, and storm water and waste water from catchments that have the potential to enter the coastal marine area. 10.4.12 That the adverse effects of development on the natural character and amenity values of the coastal environment will be minimised through: (a) the siting of buildings relative to the skyline, ridges, headlands and natural features; (b) the number of buildings and intensity of development; (c) the colour and reflectivity of buildings;
SHELDON – DEEMING ROAD (d) the landscaping (including planting) of the site; (e) the location and design of vehicle access, manoeuvring and parking areas.
The natural character of this existing coastal settlement will be maintained given the presence of a vegetated legal road reserve between the subject site and the coastal marine area. The proposed building will be stepped down the slope to reduce its profile and blend it into the existing environment. Adverse effects on water quality are avoided through the wastewater and stormwater management proposals, and fire hazard is mitigated as discussed. The proposal minimises the requirement for vegetation clearance. Water supply will be provided through catchment of rainwater.
The proposal is considered to be an appropriate use of a vacant site within the Coastal Residential Zone, where vehicle access is readily available.
Coastal Residential Zone 7.7.3 OBJECTIVES 10.8.3.1 To enable the development of residential activity in and around existing coastal settlements. 10.8.3.2 To protect the coastline from inappropriate subdivision, use and development. 10.8.3.3 To enable the development of coastal settlements where urban amenity and coastal environmental values are compatible. 7.7.4 POLICIES 10.8.4.1 That standards in the zone enable a range of housing types and forms of accommodation to be provided, recognising the diverse needs of the community and the coastal location of the zone. 10.8.4.3 That residential activities have sufficient land associated with each household unit to provide for outdoor space and sewage disposal. 10.8.4.4 That the portion of a site covered in buildings and other impermeable surfaces be limited to enable open space and landscaping around buildings and avoid or mitigate the effects of stormwater runoff on receiving environments 10.8.4.5 That provision be made for ensuring sites have adequate access to sunlight and daylight. 10.8.4.7 That provision be made to ensure a reasonable level of privacy and amenity for inhabitants of buildings.
The proposed development complies with the stormwater management, sunlight and building coverage rules of the zone, while the proposed setback breach will not affect any adjacent private property. The zoning of the site supports residential use as proposed, and the on-site wastewater system has been designed with regard to site’s constraints in terms of size and the proximity of the coastal marine area.
Natural Hazards 12.4.3 OBJECTIVES 12.4.3.1 To reduce the threat of natural hazards to life, property and the environment, thereby to promote the well-being of the community. 12.4.3.2 To ensure that development does not induce natural hazards or exacerbate the effects of natural hazards. 12.4.3.7 To avoid fire risk arising from the location of residential units in close proximity to trees, or in areas not near fire fighting services. 12.4.4 POLICIES 12.4.4.7 That the risk to adjoining vegetation and properties arising from fires be avoided. Fire hazard is avoided through the selection of building materials, and the positioning of the proposed on-site water supply. The level of risk is considered to be reasonable for this particular site.
7.1.3 Proposed Regional Plan for Northland
The objective of the Proposed Regional Plan is to manage the use, development, and protection of Northland's natural and physical resources in a way, or at a rate, which enables people and communities to provide for their social, economic, and cultural well-being and for their health and safety while:
SHELDON – DEEMING ROAD 1. sustaining the potential of natural and physical resources (excluding minerals) to meet the reasonably foreseeable needs of future generations, and 2. safeguarding the life-supporting capacity of air, water, soil, and ecosystems, and 3. avoiding, remedying, or mitigating any adverse effects of activities on the environment.
Policy D.4.3 requires the specified coastal water standard to not be exceeded, and policy D.4.5 requires overall water quality to be maintained.
As outlined in the Onsite Wastewater Design Report, the risk of future disposal field failure are reduced by using a very conservative design loading rate. The area of bush in the legal road reserve below provides an off-site buffer to reduce the risk of effects on coastal water.
7.1.4 Regional Policy Statement for Northland The Regional Policy Statement maps the proposed site as being within the coastal environment, but not as having any outstanding natural landscapes or features, or as having high or outstanding natural character. Policies 4.2.1 and 4.6.1 are relevant:
4.2.1 Policy - Improving overall water quality Improve the overall quality of Northland’s water resources by: (a) Establishing freshwater objectives and setting region-wide water quality limits in regional plans that give effect to Objective 3.2 of this regional policy statement. (b) Reducing loads of sediment, nutrients, and faecal matter to water from the use and development of land and from poorly treated and untreated discharges of wastewater; and (c) Promoting and supporting the active management, enhancement and creation of vegetated riparian margins and wetlands.
This policy is supported through the careful design of the proposed on-site wastewater system, including high level of wastewater treatment and very conservative design loading rate as described in the Onsite Wastewater Design Report. The site will retain a vegetated area downslope from the wastewater disposal field.
4.6.1 Policy – Managing effects on the characteristics and qualities natural character, natural features and landscapes (1) In the coastal environment: b) Where (a) does not apply, avoid significant adverse effects and avoid, remedy or mitigate other adverse effects of subdivision, use and development on natural character, natural features and natural landscapes. Methods which may achieve this include: (i) Ensuring the location, intensity, scale and form of subdivision and built development is appropriate having regard to natural elements, landforms and processes, including vegetation patterns, ridgelines, headlands, peninsulas, dune systems, reefs and freshwater bodies and their margins; and (iii) Encouraging any new subdivision and built development to consolidate within and around existing settlements or where natural character and landscape has already been compromised.
This policy requires significant adverse effects to be avoided, and other effects to be avoided, remedied or mitigated using the listed methods. These methods have been taken into account as follows: • The site is part of an existing coastal residential settlement; and • Downslope vegetation will remain undisturbed by the proposed development.
7.2 Part 2 of the Resource Management Act 1991 PART 2 PURPOSE AND PRINCIPLES 5 Purpose (1) The purpose of this Act is to promote the sustainable management of natural and physical resources.
SHELDON – DEEMING ROAD (2) In this Act, sustainable management means managing the use, development, and protection of natural and physical resources in a way, or at a rate, which enables people and communities to provide for their social, economic, and cultural wellbeing and for their health and safety while- (a)Sustaining the potential of natural and physical resources (excluding minerals) to meet the reasonably foreseeable needs of future generations; and (b)Safeguarding the life-supporting capacity of air, water, soil, and ecosystems; and (c)Avoiding, remedying, or mitigating any adverse effects of activities on the environment.
7 Other matters In achieving the purpose of this Act, all persons exercising functions and powers under it, in relation to managing the use, development and protection of natural and physical resources, shall have particular regard to- (b) The efficient use and development of natural and physical resources; (c) The maintenance and enhancement of amenity values; (f) Maintenance and enhancement of the quality of the environment;
6 Matters of national importance In achieving the purpose of this Act, all persons exercising functions and powers under it, in relation to managing the use, development, and protection of natural and physical resources, shall recognise and provide for the following matters of national importance: (a) the preservation of the natural character of the coastal environment (including the coastal marine area), wetlands, and lakes and rivers and their margins, and the protection of them from inappropriate subdivision, use, and development:
8 Treaty of Waitangi In achieving the purpose of this Act, all persons exercising functions and powers under it, in relation to managing the use, development, and protection of natural and physical resources, shall take into account the principles of the Treaty of Waitangi (Te Tiriti o Waitangi).
The proposal achieves sustainable management by enabling development of the subject site to establish a single residential unit, while minimising vegetation clearance, mitigating the risk of fire, and establishing careful wastewater treatment and disposal and stormwater management.
Relevant Section 6 matters have been recognised and provided for, by minimising the requirement for vegetation clearance.
In relation to Section 7 of the Act, the proposal is considered to be an appropriate and efficient use of this land, considering the site’s zoning and location within an existing coastal residential settlement. Amenity values will be maintained through small scale and low profile of the new building from Deeming Road, and retention of intervening vegetation adjacent to Veronica Channel. The overall quality of the environment can be maintained provided that the on-site wastewater system is constructed as per the design requirements.
There are no known implications in terms of the Treaty of Waitangi.
6.3 National Environmental Standards Resource Management (National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health) Regulations 2011 The subject land is not recorded on the Northland Regional Council Selected Land-use Register as a site that has been used for any activity included in the Ministry for the Environment’s Hazardous Activities and Industries List.3 It is therefore considered that the proposed activity is not considered to be subject to the above legislation.
3 Northland Regional Council (n.d.): Selected Land-use Register Map. Retrieved 2 July 2020 from https://localmaps.nrc.govt.nz/localmapsviewer/?map=65b660a9454142d88f0c77b258a05f21
SHELDON – DEEMING ROAD 8.0 Consultation
8.1 Public Notification Assessment Step 1: Public notification is not requested, nor is it required in terms of the criteria listed in 95A(3). Step 2: Public notification is precluded under Section 95A(5)(b)(ii). Step 4: No special circumstances are considered to exist that warrant the application being publicly notified in terms of 95A(9).
8.2 Limited Notification Assessment Step 1: We are not aware of any affected groups / people in terms of Section 95B(2) or (3). Step 2: Limited notification is not precluded in terms of Section 95B(6). Step 3: Fire & Emergency NZ has been approached for their approval in terms of the proposed water supply and its suitability for firefighting. Refer to their approval in Appendix 5.
Having carried out an assessment in accordance with section 95E, no other person is considered to be an affected person in terms of 95B(8). A person is considered affected if the activity’s adverse effects are minor or more than minor (but are not less than minor). The Consent Authority may disregard an adverse effect of the activity on the person if a rule or a national environmental standard permits an activity with that effect, and for a restricted discretionary activity, must disregard an adverse effect that does not relate to a matter that the District Plan restricts discretion.
The proposed development is considered to be an appropriate use for the subject site, representing the most practical site layout taking into account the site constraints. Setback breaches for a proposed wastewater reserve disposal field for treated effluent occur in relation the legal road reserve adjoining the north eastern and south western boundaries of the site, and do not impact on any neighbouring private properties.
Step 4: There are no special circumstances the warrant notification of the application to any other persons in terms of 95B(10).
8.3 Notification Assessment Summary As outlined above we are of the opinion that the proposal satisfies the statutory requirements for non-notification, and we request that it be processed on that basis.
9.0 Conclusion In terms of section 104 and 104B of the Resource Management Act 1991, we consider that:
• The actual and potential adverse effects on the environment resulting from the proposed activity will be minor or less; • The proposal is considered to be consistent with the objectives and policies of the New Zealand Coastal Policy Statement, District Plan, Regional Policy Statement, and proposed Regional Plan; and • The proposal is in accordance with the Purpose and Principles of the Resource Management Act 1991.
SHELDON – DEEMING ROAD We also note that: • Fire & Emergency NZ have provided written approval. • No further written approvals have been sought. For these reasons it is requested this application be considered to be a non-notified application, and that the Council grant consent to the proposal, under delegated authority, as detailed in the application and supporting information.
6 July 2020 Signed ...... Date ...... Natalie Watson, WILLIAMS & KING Resource Planner Kerikeri
10.0 Appendices
Appendix 1: Proposed Development Plans Appendix 2: Onsite Wastewater Design Report Appendix 3: Record of Title Appendix 4: Site Photographs Appendix 5: Fire & Emergency NZ Written Approval
SHELDON – DEEMING ROAD Appendix 1: Proposed Development Plans
SHELDON – DEEMING ROAD 10093 5907 23100 Cut, retain and batter area for Level 1 platform. 100mm - 1 Existing buried 2 1950mm high. 65m3 approx. 1 . watertanks 0 0 1 C = 22.4m . B = 17.1m 4 2 2 0 22. . 0 6
0 1 . . 1 . 825 6 0 1.3 0 0
1.50m 8 1.20m . 2 . 4 0 0 1.66 . 0 800mm Proposed Shed Bathroom (hatched) 4.45m 4.80m 4800 high 6600 400mm FFL: 21.7m retaining
wide
x 1 wall 0 300mm . Existing 0 Proposed
deep 7800 Shed Coastal surface Dwelling new CP from 51.7m2 setback 20m area water L1 FFL: 18.1m 800mm Marine Cut, & retain area for FFL: 23.8m cut-off carport ,driveway and L2 FFL: 20.8m high upper deck area.
drain retaining 25m3 approx. Waster Water Land Application System: 213m of surface laid PCDI dripline, 16 x 2 6
. 19m pinned at 0.7m centers and covered CULVERT 0 with a minimum of 100mm landscape mulch. To be protected from stock and vehicular traffic. See Waste Water new CP Report. CP
approx. new CP driveway 170m2 2 5350 proposed vegetation area to be cleared 2 . 2 SWMH 1 Existing SW pipe 0 4
for new dwelling (120m2) 5.10m 2 Lid 102.89 1.50m .0 .
0 A = 16.2m
1 2 CULVERT 0 4 1 1 . . 6 approximate location of SW pipe 8 0 0 .0 (from Far North Maps) . SWMH 0 drainage easement Lid 102.79
connect SW drainage NaturalFlow Series into existing SW system NF11000P System
GENERAL NOTES
Lot No. 3 64099 900x1000 hose tap DP No. shower unit Site Area 1093m2 Territorial Authority Far North District Council
Planning Zone Coastal Residential 1020
Wind Zone Very High 90 New walls: 90x45 wall a r c h i t e c t u r a l 710 slider Earthquake Zone 1 framing @ 600crs lined p 0274 780 009 Corrosion Zone D with 12mm plywood e [email protected] 2770 90 each side. Auckland : PO Box 800 Whangaparaoa 0943 Maximum Building Height 8m Bay Of Islands : 30M Sullivans Rd Paihia 0200 www.goingarchitectural.co.nz
Job: Site Plan 1:200 Proposed new dwelling Existing Shed / Workshop 7800 for B. Sheldon & F. Aspden 18 Deeming Road, Okiato, Impermeable surfaces Russell
Garage = 51.7m2 House = 114.8m2 Shed Date: Carport = 22.6m2 25th June 2020 Watertanks = 20.0m2 Ref: 19-55 Scale: A3 size Driveway = 170.0m2 Plan 1:100 Sheet: A-02 of: Total Area = 379.1m2 6600 RC Plans -1 16300
900 10500 2400 3400
900 90 2040 70 820 90 1890 90 2000 90 2030 90 1110 90 2400 3400
800x800 800x800 800x800 90 90
290 pantry
L'dry eaves line (dotted) 1200 wc steel beam 1400 1580 2020 Ensuite WR 2300x1800 eaves 90
Louvres FFL: 21.7m
line 90
shown down Entry 2200x1400
dotted 5600 wall L2 FDL: 20.8m Carport Master Bedroom Kitchen 3930 retaining 3310 7800 2300x3300 steel beam wall timber 6600 high high wall 1200mm Louvres doors 800mm 90 2300x800 90 retaining 11200 A Deck A 8073.2 stacker A07 A07 L2 FFL: 20.8m timber high 2200x5400
Dining 1200mm Deck steel beam 3788.1 doors Lounge 5600 5600 balustrade stacker glass
high wood 2300x5400
Fireplace stack 265 3400 1.0m
Entertainment driveway
1846 1322.4 90 1800 2300x2200 90 2220
397.4 300 90 224.5 a r c h i t e c t u r a l 2400 p 0274 780 009 e [email protected]
Auckland : PO Box 800 Whangaparaoa 0943 Bay Of Islands : 30M Sullivans Rd Paihia 0200 1800 2408.2 5991.8 1200 2400 3400 www.goingarchitectural.co.nz Elevation Key Floor Areas Job: 4 900 15400 L2 House = 95.1m2 Proposed new dwelling = 6.5m2 1 3 L1 House for B. Sheldon & F. Aspden Total House = 101.6m2 18 Deeming Road, Okiato, 2 Russell Carport = 22.4m2
Date: Floor Plan 1:75 L2 Decks = 36.4m2 25th June 2020 L1 Deck = 48.2m2 Ref: 19-55 Scale: A3 size Total Decks = 84.6m2 Sheet: A-03 of: RC Plans -1 5090
1000 2910 90 1000 90 100 90 300 600x2400 (angled)
L1 FFL: 18.035m 5000 5320 dotted
up wall shown above retaining floor timber of high outline 90 11200 1950mm dotted
4900 Deck shown 4675 above deck of outline 925 1000 199 199 a r c h i t e c t u r a l p 0274 780 009 e [email protected]
Auckland : PO Box 800 Whangaparaoa 0943 Floor Areas Bay Of Islands : 30M Sullivans Rd Paihia 0200 www.goingarchitectural.co.nz
L2 House = 95.1m2 Job: L1 House = 6.5m2 Elevation Key Proposed new dwelling for B. Sheldon & F. Aspden Total House = 101.6m2 4 18 Deeming Road, Okiato, 1 3 Carport = 22.4m2 Russell Lower Floor Plan 1:100 2 L2 Decks = 36.4m2 Date: L1 Deck = 48.2m2 25th June 2020 Ref: Scale: Total Decks = 84.6m2 19-55 A3 size Sheet: A-04 of: RC Plans -1 compliant - cedar rusticated weatherboards rule over cavity battens
- sunlight colorsteel T-Rib metal longrun C roofing 24 24
compliant - rule colorsteel T-Rib metal cladding 22 sunlight (horizontal) over cavity 22
sunlight
rule - 20 compliant 20
Elevation 3. 1:100 18 18
B
16 A
Elevation 1. 1:100
colorsteel T-Rib metal cladding (horizontal) over cavity 24
22
20 a r c h i t e c t u r a l p 0274 780 009 e [email protected]
Auckland : PO Box 800 Whangaparaoa 0943 Bay Of Islands : 30M Sullivans Rd Paihia 0200 www.goingarchitectural.co.nz
18 Job: Proposed new dwelling Elevation 2. 1:100 for B. Sheldon & F. Aspden 18 Deeming Road, Okiato, 16 Russell
Date: 25th June 2020 Ref: 19-55 Scale: A3 size Sheet: A-05 of: RC Plans -1 24
22
20
18
Elevation 4. 1:100 16
5° pitch
24
22 3190 2455 800 900 1325 20
2455 a r c h i t e c t u r a l p 0274 780 009 e [email protected]
Auckland : PO Box 800 Whangaparaoa 0943 Bay Of Islands : 30M Sullivans Rd Paihia 0200 18 1950 www.goingarchitectural.co.nz
Job: Proposed new dwelling 16 Typical Section. 1:100 for B. Sheldon & F. Aspden 18 Deeming Road, Okiato, Russell 14 Date: 25th June 2020 Ref: 19-55 Scale: A3 size Sheet: A-06 of: RC Plans -1 selected colorsteel maxx metalcraft T-Rib roofing over on 240x45 timber rafters @ 800crs
selected colorsteel maxx metalcraft T-Rib roofing over building underlay 5° pitch and netting on 70x45 purlins on 2/240x45 timber rafters @ 900crs
cedar rusticated weatherboard 12mm plywood ceiling cladding over 20mm cavity 12mm plywood soffit lining lining fixed to 70x35 ceiling battens & building wrap battens @ 400crs selected powder coated aluminium 3190 joinery with double glazing selected ex 100x25 decking on 2455 190x45 deck joists @ 400crs 800 20mm plywood flooring on 290x45 floor joists @ 400crs 1.0m high glass balustrade system 900 1325
selected ex 100x25 decking on 240x45 cantilever deck joists @ 400crs
2455 expol under floor 200 SED H5 deck poles insulation panels selected ex 100x25 decking on set in 450dia x 1.8m fixed between joists 240x45 deck joists @ 400crs deep concrete bores 1950
Section A-A. 1:50
a r c h i t e c t u r a l p 0274 780 009 e [email protected]
Auckland : PO Box 800 Whangaparaoa 0943 Bay Of Islands : 30M Sullivans Rd Paihia 0200 www.goingarchitectural.co.nz
Job: Proposed new dwelling for B. Sheldon & F. Aspden 18 Deeming Road, Okiato, Russell
Date: 25th June 2020 Ref: 19-55 Scale: A3 size Sheet: A-07 of: RC Plans -1 10093 5907 23100
1 Existing buried
2
1 . watertanks 0 0 1
.
4 2 2 0 22. . 0 6
0 1 . . 1 . 6 0 1.3 0 0
8 1.20m . 2 . 4 0 0 1.66 . 0 4.45m 4.80m
400mm FFL: 21.7m 6600
wide
x
1 300mm 0 Proposed . Existing 0 Cut, retain and batter area for Level 1 platform. 100mm - deep Dwelling L1 FFL: 18.1m 7800 1950mm high. 65m3 approx. Shed
surface L2 FFL: 20.8m 51.7m2
water FFL: 23.8m Cut, & retain area for proposed vegetation area cut-off carport, driveway & to be cleared for new upper deck area. dwelling (120m2) drain 25m3 approx.
2 6
. CULVERT 0
0.8m x 0.8m x 0.4m deep proposed driveway detention pond 600mm CP driveway fit temporary 150mm dia flexible high approx. silt fence outlet pipe from top of detention 2
2
. SWMH pond to existing SW system 5.10m 2 1 Existing SW pipe 0 4
2 Lid 102.89 .0 .
0
1 2 CULVERT 0 4 1 1 . . 6 approximate location of SW pipe 8 0 0 .0 (from Far North Maps) . SWMH 0 drainage easement Lid 102.79
Effluent System position
GENERAL NOTES
Lot No. 3 DP No. 64099 Site Area 1093m2 Territorial Authority Far North District Council Planning Zone Coastal Residential Earthworks / site preparation Wind Zone Very High Site to be cleared of topsoil for flat concrete floor a r c h i t e c t u r a l building platforms. Earthquake Zone 1 p 0274 780 009 Corrosion Zone D All topsoil to be retained on site for reinstatement. e [email protected] Auckland : PO Box 800 Whangaparaoa 0943 Maximum Building Height 8m Bay Of Islands : 30M Sullivans Rd Paihia 0200 Silt control www.goingarchitectural.co.nz 600mm high silt detention fence to be errected around Job: building platform perimeter on all down-slope areas for Site Plan - Temporary Site Sediment Control 1:200 duration of project using geofabric supported with Proposed new dwelling waratahs, with earth bund and straw at base of fence. for B. Sheldon & F. Aspden 18 Deeming Road, Okiato, Russell
Date: 25th June 2020 Ref: 19-55 Scale: A3 size Sheet: EW-01 of: 1 Appendix 2: Onsite Wastewater Design Report
SHELDON – DEEMING ROAD STATEMENT OF DESIGN - PS1
Issued by: Dean Hoyle To: Robert Brett Sheldon Copy to be supplied to: Far North District Council In Respect of: NaturalFlow Domestic Onsite Wastewater and Sewage System Design At: 18 Deeming Rd, Okiato Legal Description: Lot 3 DP 64099
Waterflow NZ Ltd has been engaged by Robert Brett Sheldon to provide the technical design services and details in respect of the requirements of G13/VM4 and B2 Durability of the Building Regulations 2004, for an Onsite Wastewater and Sewage System for their building at the above location.
The Design has been carried out in accordance with Auckland Council TP-58 Guidelines and Clause B2, G13 and G14 of the Building Regulations 2004.
The proposed building work covered by this producer statement is described on the drawings titled: Robert Brett Sheldon Onsite Wastewater Design Report, and numbered 1-48 together with the specification, and other documents set out in the schedule attached to this statement.
On behalf of the Design Firm, and subject to: (i) Site verification of the following design assumptions: correct installation of the system and drainage fields (ii) All proprietary products meeting their performance specification requirements;
As an independent design professional covered by a current policy for Professional Indemnity Insurance, no less than $200,000*, I believe on reasonable grounds the building, if constructed in accordance with the drawings, specifications, and other documents provided or listed in the attached schedule, will comply with the relevant provisions of the Building Code.
Signed by: Dean Hoyle – PS Author ‘3037’ Auckland Council, NZQA Onsite Wastewater Training/Opus, BOINZ OWM, HBRC & FNDC Approved Designer
Date: 19.05.20
Signature:
Waterflow NZ Ltd 1160 State Highway 12 Maungaturoto 0520
Note: This statement shall only be relied upon by the Building Consent Authority named above. Liability under this statement accrues to the Design Firm only. The total maximum amount of damages payable arising from this statement and all other statements provided to the Building Consent Authority in relation to this building work, whether in contract, tort or otherwise (including negligence), is limited to the sum of $200,000*. Northland Regional Council Plan Rules 2019 (Pg 112 of Plan)
Permitted Activity Checklist C.6.1 On-site domestic wastewater discharges
The discharge of domestic type wastewater into or onto land from an on-site system is a permitted activity provided:
Pass / Fail / Not Applicable 1) the on-site system is designed and constructed in accordance with the New Zealand P Standard AS/NZS 1547:2012 - On-site Domestic Wastewater Management, and 2) the volume of wastewater discharged does not exceed two cubic metres per day, and P
3) the discharge is not via a spray irrigation system or deep soakage system, and P
4) the slope of the disposal area is not greater than 25 degrees, and P
5) the discharge of secondary treated or tertiary treated wastewater is via an irrigation line system that is: P a) dose loaded, and P b) covered at all times by a minimum of 50 millimetres of topsoil, mulch, or bark, and P
6) for the discharge of wastewater onto the surface of slopes greater than 10 degrees: P a) the wastewater, excluding greywater, has received at least secondary treatment, and P b) the irrigation lines are firmly attached to the surface of the disposal area, and P c) where there is an up-slope catchment that generates stormwater runoff, a diversion system must be installed and maintained to divert surface water runoff from the up- P slope catchment away from the disposal area, and d) a minimum 10 metre buffer area down-slope of the lowest irrigation line is included as part of the disposal area, ( Separation distance to watercourses is taken from the boundary of this F extended “disposal area”) and e) the disposal area is located within existing established vegetation that has at least 80 percent canopy cover, or P f) the irrigation lines are covered at all times by a minimum of 100 millimetres of topsoil, mulch, or bark, and P
7) the disposal area is situated outside of the relevant setbacks in Table 4 'Horizontal and vertical setback distances for on-site domestic wastewater systems', and P
8) for septic tank treatment systems, a filter that retains solids greater than 3.5 n/a millimetres in size is fitted on the outlet, and 9) the following reserve disposal areas are available at all times: a) 100 percent of the existing effluent disposal area where the wastewater has received F primary treatment or is only comprised of greywater, or
b) 30 percent of the existing effluent disposal area where the wastewater has received secondary treatment or tertiary treatment, and F
10) the on-site system is maintained so that it operates effectively at all times and is done, at a minimum, in accordance with the manufacturer's specifications for P maintenance, and
11) the discharge does not contaminate any water supply or surface water, and P
12) there is no surface runoff or ponding of wastewater, and P
13) there is no offensive or objectionable odour beyond the property boundary. P
Table 4 Horizontal and vertical setback distances for on-site domestic wastewater systems
Feature Primary P/F/NA Secondary P/F/NA Greywater P/F/NA + Property boundary 1.5m 1.5m 1.5m P
Identified stormwater flowpath, including road with curb and channel, water-table 5.0m 5.0m 5.0m P drain, off-stream dam or pond downslope of disposal area
River, lake, stream, pond or wetland 20.0m 15.0m 15.0m P
Coastal marine area 20.0m 15.0m 15.0m P
Winter groundwater table 1.2m 0.6m 0.6m P
Water supply bore 20.0m 20.0m 20.0m n/a
Floodplain 1% Annual 5% Annual 5% Annual exceedance exceedance exceedance n/a probability probability probability Overland flows for 1% Annual 1% Annual 1% Annual constructed stormwater exceedance exceedance exceedance probability probability probability n/a systems
tertiary
2020
Waterflow NZ Ltd Certified Designer
Robert Brett Sheldon 18 Deeming Rd Okiato Lot 3 DP 64099 19.05.20
[ONSITE WASTEWATER DESIGN REPORT]
Onsite Wastewater Design Report by Waterflow NZ Ltd – Copyright 2014 ON-SITE WASTEWATER DESIGN REPORT
TABLE OF CONTENTS
PART A: CONTACT AND PROPERTY DETAILS …………………………………………………………………………………..3
PART B: SITE ASSESSMENT - SURFACE EVALUATION …………………………………………………………………………………..5
PART C: SITE ASSESSMENT - SOIL INVESTIGATION …………………………………………………………………………………..7
PART D: DISCHARGE DETAILS - SEE HYDRAULIC LOADING TABLES …………………………………………………………………………………..9
PART E: LAND DISPOSAL METHOD …………………………………………………………………………………..10
PART F: PROPOSED WASTEWATER TREATMENT SYSTEM …………………………………………………………………………………..10
PART G: OPERATION AND MAINTENANCE OF SYSTEM …………………………………………………………………………………..11
PART H: SOIL LOG PROFILE …………………………………………………………………………………..12
PART I: SITE IMAGES …………………………………………………………………………………..13
DECLARATION …………………………………………………………………………………..14
SITE LAYOUT PLAN: …………………………………………………………………………………..16
Attachments - PS1 - Certificate of Title - Land Application System Schematics - Pump Specification - Electrical Diagram - Assessment of Environmental Effects - System & Installation Specifications - Home Owners Care Guide
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PART A: CONTACT AND PROPERTY DETAILS A 1. Consultant / Evaluator Name: Dean Hoyle Company/Agency: Waterflow New Zealand Ltd Address: 1160 SH 12 Maungaturoto Phone: 09 431 0042 Fax: 09 431 8845 Email Address: [email protected]
A 2: Applicant Details Applicant Name: Robert Brett Sheldon Company Name: Property Owner: Robert Brett Sheldon Owner Address: 18 Deeming Rd, Okiato Phone: Mobile: 021 402919 Email Address: [email protected]
A 3: Site Information Sited Visited by: Darren Adams Date: Physical Address: 18 Deeming Rd, Okiato Territorial Authority: Far North District Council Regional Council: Northland Regional Council Regional Rule C.6.1.5 Legal Status of Activity: Permitted: Controlled: Discretionary: x Total Property Area (m²): 1093m 2 Map Grid Reference: Legal Description of Land (as on Certificate of Title): Lot No: 3 DP No: 64099 CT No:
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A 4: Are there any previous existing discharge consents relating to this proposal or other waste discharge/disposal on the site?
Yes: No: x
If yes, give reference No’s and description:
A 5: Dwelling(s) for which on-site wastewater service is to be provided Status of dwelling(s) to be serviced: New: x Existing: Multiple: How many dwellings on the property? 1 Capacity of dwellings: Dwelling 1 1 (or number of bedrooms) Dwelling 2 Dwelling 3 Other: Notes:
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PART B: SITE ASSESSMENT - SURFACE EVALUATION B 1: Site Characteristics Performance of adjacent systems: (Unknown) Estimated annual rainfall (mm): 1250 - 1500 (as per NIWA statistics) Seasonal variation (mm): 300-400mm Vegetation cover: Native bush & regrowth Slope shape: Linear Planar Slope angle: 20 - 24 0 Surface water drainage characteristics: Broad overland flow across site Flooding potential? Yes: No: x If Yes, specify relevant flood levels relative to disposal area: Site characteristics: rectangular shaped rural residential property on the eastern slopes of a trending ridgeline. The eastern portion of the site is generally covered in pasture grass and the lower weastern portion is native bush and regrowth. The property is bounded by residential properties to the north and south, Demming Rd to the east and bush reserve to the west.
B 2: Slope Stability Has a slope stability assessment been carried out on the site? Yes: x No: If no, why not? Low slope: No signs of instability: Other:
If yes, give brief details of report: Details: Geotechnical Report Author: Callum Rees Company/Agency: Vision Consulting Date of report: 17/04/2020
B 3: Site Geology As per: Geotechnical Report by Vision Consulting
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B 4: Slope Direction What aspect does the proposed disposal system face? North West x North-West South-West North-East South-East East South
B 5: Site Clearances if applicable (also on site plan) Disposal Field Separation Distance Treatment Separation Distance (m) (m) Boundaries: >1.5 >1.5 Surface Water: >15 >15 Ground Water: >0.6 >0.6 Stands of Trees / Shrubs: n/a n/a Wells/Water Bores: n/a n/a Embankments / Retaining >2 >3 Walls: Buildings: >3 1.5 Other:
B 6: Please identify any site constraints applicable for this property, and indicate how the design process is to deal with these. Constraints Explain how constraints are being dealt with 1 Site constraints: (a) Site size allows no reserve area Have specified a very conservative DLR to mitigate/remove any risk of future field failure (b) Site size allows no buffer zone Have specified a very conservative DLR to mitigate/remove any risk of breakout or short curcuiting. There is also a large area of bush reserve adjacent to the western boundary
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PART C: SITE ASSESSMENT - SOIL INVESTIGATION C 1: Soil Profile Determination Method Test pit: Depth (mm): No. of Test pits: Bore hole: x Depth (mm): 2200 No. of Bore holes: 1 Other:
C 2: Fill Material Was fill material intercepted during the subsoil investigation? Yes: No: x If yes, please specify the effect of the fill on wastewater disposal:
C 3: Permeability Testing Has constant head Permeability Testing (Ksat) been carried out? Yes: No: x If yes, please indicate the details (test procedure, number of tests):
Test report attached? Yes: No: x
C 4: SURFACE WATER CUT OFF DRAINS Are surface water interception/diversion drains required? Yes: No: x
C 5: DEPTH OF SEASONAL WATER TABLE: Winter (m): >1.2 Summer (m): >1.2 Was this: Measured: ✓ no sign of ground water or mottling in bore holes Estimated:
C 6: SHORT CIRCUITS Are there any potential short circuit paths? Yes: No: x If yes, how have these been addressed?
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C 7: SOIL CATEGORY Is topsoil present? Yes: x No: If yes, what is the topsoil depth & soil description? 200mm Silty Topsoil over Silty Clays Indicate the disposal field soil category (as per AC TP-58, Table 5.1) Category Description Drainage (x) 1 Gravel, coarse sand Rapid draining 2 Coarse to medium sand Free draining 3 Medium-fine & loamy sand Good draining 4 Sandy loam, loam & silt loam Moderate draining 5 Sandy clay-loam, clay loam & silty clay-loam Moderate to slow draining 6 Sandy clay, non-swelling clay & silty clay Slow draining x 7 Swelling clay, grey clay & hardpan Poorly or non-draining
Reason for placing in stated category: Result of bore hole/test pit sample x Profile from excavation Geotech report Other:
C 8: SOIL STRUCTURE Based on results of the in-situ soil profile investigation above (C7) please indicate the disposal (land application) field soil structure: Massive Single grained Weak Moderate x Strong
C 9: As necessary, provide qualifying notes on the relationship of Soil Category (C7) to Soil Structure (C8) and the effect this relationship will have on design loading rate selection:
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PART D: DISCHARGE DETAILS - SEE HYDRAULIC LOADING TABLES D 1: Water supply source for the property: Rain water (roof collection) x Bore/well Public supply
D 2: Are water reduction fixtures being used? Yes: No: x If ‘yes’ Please state: Standard Fixtures include dual flush 11/5.5 or 6.3 litre toilet cisterns, and includes standard automatic washing machine, but a low water use dishwasher, no garbage grinder.
D 3: Daily volume of wastewater to be discharged: No. of bedrooms: Dwelling 1: 1 Dwelling 2: 0 Dwelling 3: 0 Design occupance (people): 2 (as per AC TP-58, Table 6.1) Black / Grey water Per capita wastewater production (litres/person/day): 160 (as per ARC TP-58, Table 6.2) Total daily wastewater production (litres per day): 320
D 4: Is daily wastewater discharge volume more than 2000 litres? Yes: No: x
D 5: Gross lot area to discharge ratio: Gross lot area: 1093 m² Total daily wastewater production (litres/day): 320 Lot area to discharge ratio: 3.42
D 6: Net Lot Area Area of lot available for installation of the disposal (land application) field and reserve area: Net lot area (m²): 400 m² Reserve area (m²): 0%
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PART E: LAND DISPOSAL METHOD E 1: Indicate the proposed loading method: Black / Grey Water Gravity Dose: Dosing Siphon: Pump: BIA-B42A
E 2: If a pump is being used please provide following information: Total Design Head (m): 32 Pump Chamber Volume (litres): 1500 Emergency Storage Volume (litres): 4500 Is a high water level alarm being installed in pump chambers? Yes: x No:
E 3: Identify the type(s) of Land Disposal method proposed for this site: Black / Grey Water P.C.D.I. Dripper Irrigation: PCDI surface laid and mulched L.P.E.D. System: Evapo-Transpiration Beds: Other: (as per Schematics attached)
E 4: Identify the Loading Rate proposed for option selected in E3: as per ARC TP-58, Table 9.2 & Table 10.3 Black / Grey Water Loading Rate (litres/m²/day): 1.5 Disposal Area Basal (m²): Areal (m²): 213
E 6: Details and dimensions of the disposal (land application) field: Length (m): 19.0 No. Lines: 16 Hole Size: N/A Width (m): 11.2 Spacing (m): 0.7 Hole Spacing: N/A
surface laid PCDI dripline pinned at 0.7m centers and covered with a minimum covering of Notes: 150mm landscape mulch. See schematic drawing attached.
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PART F: PROPOSED WASTEWATER TREATMENT SYSTEM
A Naturalflow NF11000P Treatment System, pump fed through surface laid PCDI dripline is suitable for this site. The NF11000P Treatment System has enough capacity to accommodate 2000ltr per day, so will be well within its capacity. The land application system is designed to discharge a maximum volume of 320ltrs per day and if this is exceeded it could cause failure resulting in environmental and public harm.
PART G: OPERATION AND MAINTENANCE OF SYSTEM
The operation of this complete system will be explained verbally to the owner by the Installer or Agent on Completion of Installation; also provided with Waterflow’s Home Owner’s Manual.
Waterflow NZ Ltd encourages the Home Owner to monitor and care for your Naturalflow system yourself, with our backing and support, and by doing so you will learn how your system works and operates and how to keep it in top working order.
It is also recommended that a Maintenance Program contract is in place at all times to ensure this system is maintained at top performance at all times.
All on site wastewater systems require regular maintenance; in this case once annually is suffice and may be specified within the consent process by the Building Department of Far North District Council. This Maintenance will be recorded on hard copy and supplied to both the Owner and Far North District Council Compliance Officer if requested.
NOTE TO OWNER: All written records pertaining to the wastewater system should be retained in a safe place. When a change of ownership occurs, a full and complete history is able to be passed to the new owners.
Animals are to be physically excluded from the installed effluent field to avoid damage, and to reduce the risk of soil compaction in the vicinity of the bed.
Planting within this area is encouraged to assist with evapotranspiration by plants.
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PART H: SOIL LOG PROFILE
200mm Silty Topsoil over Silty Clays Class 6, (as per AC TP-58, Table 5.1)
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PART I: SITE IMAGES
NaturalFlow Series Proposed Building Platform NF11000P System
Land Application System: 213m of surface laid PCDI dripline, 16 x 19m pinned at 0.7m centers and covered with a minimum of 100mm landscape mulch. To be protected from stock and vehicular traffic. See schematic drawing attached.
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DECLARATION I, hereby certify that, to the best of my knowledge and belief, the information given in this application is true and complete. Prepared By: Dean Hoyle – PS Author ‘3037’ Auckland Council, NZQA Onsite Wastewater Name: Training/Opus, BOINZ OWM, HBRC Approved Designer
Signature:
Date: 19.05.20
Reviewed By: Name: Gerald Hoyle - NZQA Onsite Wastewater Training/Opus, HBRC Approved Designer
Signature:
Date: 19.05.20
NOTE: The Waterflow Systems are to be installed by a registered drainlayer to the designs supplied by Waterflow NZ Ltd. All work to comply with Regional Council Water and Soil Plans.
Comments/Summary: The disposal field will need to be protected from traffic and animal grazing. Planting this area is recommended to increase Evapotranspiration.
Suitable plants for the disposal field can be found on our website www.naturalflow.co.nz
Waterflow Treatment systems to be installed by accredited installer unless other arrangements have been made by Waterflow NZ Ltd
For more information do not hesitate to contact the team at Waterflow NZ Ltd on 0800 628 356
Onsite Wastewater Design Report by Waterflow NZ LTD – Doc 1161 Copyright 0.0 Design Report Sheldon 14 Enlargement on next page
SITE LOCATION PLAN: SCALE: Robert Brett Sheldon 18 Deeming Rd Okiato 1 : 109 Lot 3DP 64099 0.1093HA @ A3
Onsite Wastewater Site Evaluation Investigation Checklist – Doc 1161 Copyright Page 14 Land Application System: 213m of surface laid PCDI dripline, 16 x 19m pinned at 0.7m centers and covered with a minimum of 100mm landscape mulch. To be protected from >20m Setback to stock and vehicular traffic. See schematic drawing attached. marine environment
Proposed Building Platform
Bore Hole
Boundary - 1.5m min setback
NaturalFlow Series NF11000P System
No reserve area available, have specified very conservative DLR to mitigate any risk of field failure in the future
SITE LAYOUT PLAN: SCALE: DATE DRAW: 19.05.20 Robert Brett Sheldon PREPARED BY: Dean Hoyle 18 Deeming Rd 1 : 25 REVISED: Gerald Hoyle Okiato Lot 3 DP 64099 0.1093HA @ A3
Onsite Wastewater Site Evaluation Investigation Checklist – Doc 1161 Copyright Page 15 Standard PCDI Single Manifold Layout
50 - 25mm Feed Line and Manifold
Vacuum Breaker @ highest point in Manifold 16mm PCDI Dripline Spaced as per Design
(Number & Length of PCDI Driplines as stated in Design)
Flush Valves
Flush Valve
150mm Mulch or Leaf Litter Subsoil Buried @ 100-150mm
PRODUCT PROFILE BIANCO SUBMERSIBLE PUMP BIA-B42A
The pump is a submersible drainage pump fitted with noryl impellers and stainless steel strainer.The pump has can handle particles up to 3mm.
The pump is characterised by: • Glass filled pump body and noryl impellers for durability • Fully automatic operation. • Dual mechanical seals (Carbon ceramic on pump side and silicon carbide/ceramic in oil bath on motor side) • Carry handle for ease of transport • 240V single phase motor with in-built auto reset thermal overload. • 10m of power cable. • Dewatering of cellars, garages etc. • Pumping clean or slightly dirty water • Flows to 105L/min • Heads to 32 m Electrical data: Rated voltage: 240V Liquid: Mains frequency: 50 Hz Clean water temperature range: 2 – 35 °C Rated output: 550W Materials: Current: 4.0 amps Pump body: Glass filled ylonn Capacitor: 20 uF Strainer: 304 SS Motor duty: Continuous Impeller: Glass filled ylonn Motor type: Asynchronous Shaft: Stainless Steel 410 Motor protection: In-built thermal overload Shaft seal: Dual mechanical seals (Carbon ceramic Ingress protection: IP 68 on pump side and silicon carbide/ceramic Insulation class: F in oil bath on motor side) Power cable length: 10 m H07RNF Net weight: 12 kg Installation: Dimensions: 171Lx162Wx461H (mm) Maximum ambient temperature: 40 °C Pipe connections discharge: 1¼” F 2 Year Bianco Pumpz Warranty
Distributed by White International Pty Ltd Distributed by White International NZ Ltd A.B.N. 48 000 119 380 138 Hugo Johnston Dr, Penrose, Auckland PO BOX 304 MILPERRA LPO NSW 2214 PO BOX 12704, PENROSE, AUCKLAND Ph: 02 9783 6000 Fax: 02 9783 6001 Ph: 09 579 9777 Fax: 09 579 7775 HOTLINE: 1300 783 601 FAXLINE: 02 9783 6003 HOTLINE: 0800 509 506 FAXLINE: 0800 804 344 BIA-B42A_121003
NaturalFlow Series NF11000 Treatment System Pump
Alarm controller inside dwelling (must be on a seperate electrical circuit H4 Tanalised 100x100 Post to power supply to outdoor power socket) Weatherproof IP53 power socket
Low voltage Power supply to outdoor 750mm Dia Lid cable for power socket (240 volt) alarm sensor Secondary (12 volt) SXL1000
1000 LTRS To Disposal Field as per AS/NZ 1547:2012 SXL1375 or relevant Local Authority requirements
1630 1500 LTRS
SXL5000 2100 ® 1300 WORMORATOR 1800mm 1260 Matrix Filter 4000 LTRS 470
2200 1260
Copyright Waterflow New Zealand Limited 2012© Assessment of Environmental Effects
Robert Brett Sheldon of 18 Deeming Rd, Okiato Lot 3 DP 64099
1.1 Description of Proposal The owners of this site propose the construction of a new 1 bedroom dwelling .
1.2 Site Description This site, located at 18 Deeming Rd, is a rectangular shaped rural residential property on the eastern slopes of a trending ridgeline. The eastern portion of the site is generally covered in pasture grass and the lower weastern portion is native bush and regrowth. The property is bounded by residential properties to the north and south, Demming Rd to the east and bush reserve to the west.
1.3 Wastewater Volume In calculating the wastewater flows we have allowed for a maximum occupancy of 2 persons, based on the proposed 1 bedroom dwelling (as per AC TP-58, Table 6.1). Total wastewater production is based on an allowance of 160 litres per person per day (as per ARC TP-58, Table 6.2), which is conservative given that water supply is roof collected rain water and standard water fixtures will be used throughout the house.
1.4 Wastewater Volume The Naturalflow Series NF11000 treatment system that is proposed will treat the wastewater to a high standard prior to dispersal using a PCDI drip line, into a purpose-designed disposal field, where the removal of nutrient will continue, both in the receiving soils and by plant uptake.
The system will be capable of producing reductions in Biochemical Oxygen Demand, Total Suspended Solids, Nitrogen, and Coliforms to a standard that meets the requirements (see details below). The system will cater for the wastewater requirements of the private dwellings (domestic wastewater) and will not service any commercial or trade waste sources. Risk Minor to Nil.
1.5 Proposed Treatment System The objective of the treatment system is to reduce and remove much of the contaminants from the wastewater prior to discharge into the receiving soil. This will improve the long- term performance of the disposal field as well as reducing the risk to the receiving environment. The system will consist of: - Wormorator Module - Grey Water Module - Treated Effluent Pump Chamber - Control panel with audio and visual alarm - Land Application System The system is constructed using plastic roto-molded tanks. The system produces treated effluent with BOD <20mg/l, Suspended solids <20mg/l.
1.6 Land Application System The proposed irrigation system uses pressure-compensating dripper lines ensuring an even delivery of moisture over the entire irrigation field and a conservative DLR of 1.5mm. We propose the use of Metzerplas unibioline ADI16/2.2 @ 0.6m/c with the Dripline laid out at 0.7m centres. This Dripline will then be covered by 100mm landscape mulch. Densely planting this area will greatly enhance evapo-transpiration and be very beneficial especially in the wetter months of the year. This irrigation can be installed in conjunction with existing or proposed landscaping.
1.7 Surface & Ground Water It is proposed to treat the water to a high standard prior to discharge and the proposed irrigation system will introduce the water into the topsoil horizon using PCDI irrigation. A low application rate of treated effluent into the topsoil will significantly reduce the likelihood of, any breakout or runoff or any risk of surface water contamination. With the ground water levels being >1.2m this conservative DLR also means the risk of ground water contamination is virtually nil. A majority of the undeveloped areas of this site are suitable for a PCDI disposal field when the necessary setbacks are observed. Risk Minor to Nil.
1.8 Air Quality The proposed Series NF11000 treatment system will produce no noticeable odour when functioning correctly. Any odour will be contained within the tanks. The PCDI irrigation system will load the soil at a rate that should not cause ponding, spraying or aerosol of the effluent that could potentially cause odours. Risk Minor to Nil.
1.9 Visual Impact The tanks are installed wholly below ground level with only the lids being visible. The lids will protrude approximately 100mm to prevent egress of storm water into the system. The disposal field will be located in a purpose designed mulched and intensively planted disposal area. Warning signs may be installed to indicate the presence of the disposal area, although probably not necessary in a domestic situation, also the area may be fenced to restrict access.
1.10 Environmental Risks Risks are associated with this proposal are minor. The treatment system will be automated, and the Home Owner will be given a ‘Home Owners Care Guide’ which explains the necessary visual checks to ensure no issues arise with the system, specifically – solids build- up - high water level – discharge failure – filter blockage.
Peak flow into the system are not expected to be significant and the system includes a large emergency storage volume.
1.11 Maintenance Requirements The maintenance requirement of this system is minimal, with the system fully automated. The system requires little input from the operator apart from the regular cleaning of the outlet filter between the treatment system and the Dripline field. All other maintenance interventions must be carried out by service persons familiar with the operation of the system and approved by the manufacturer. Maintenance may include checking of the dissolved oxygen levels, cleaning of effluent outlet filter, removal of excess sludge volume, checking of control panel function, etc….
The disposal field is quite possibly the most important and sensitive part of the treatment system and requires a reasonable amount of maintenance to keep it function well.Any leaking or damaged Dripline must be fixed quickly using the appropriate materials, the planting must be maintained, weeds removed and grass kept cut. The Dripline should be kept covered with a suitable bark, mulch, or topsoil. NaturalFlow Series NF11000 Treatment System System Specifications & Installation Instructions NATURALFLOW SERIES NF11000
System Specification & Installation Instructions
New Zealand’s Leaders in Eco-Sustainable, Odourless Wastewater and Sewage Systems
Compliance Requirements
All NaturalFlow Treatment Systems meet the requirements of the NZ Building Code G13-VM4.
Section 9 of AS/NZS 1546.1:2008 state that tanks constructed to these Standards will meet the requirements of the Code for Clauses B1 and B2, structure and durability.
Compliance with Section 9 of AS/NZS 1546.1:2008 and also Clauses G13.3.4 relating to on-site treatment and disposal systems and G14.3.1 and 14.3.2 relating to the control of foul water as an industrial waste are covered in the ‘NaturalFlow Compliance Requirements’ document.
Please feel free to ask for a copy of this complete document, if required.
The Treatment Process
The NaturalFlow Series NF11000 System comprises of a 1.8m diameter x 1.7m high WORMORATOR® module where the black water (B/W), (which in the NaturalFlow System includes the kitchen sink waste) in order to remove the solids, is directed onto a bed of natural medium lined with a textile cloth which is designed to retain maximum solids.
These residual solids are seeded with tiger worms which proceed, as results of long term testing have shown, to digest them reducing the volume by approximately 95%, leaving only residual vermicasts which are virtually free of harmful bacteria and other pollutants. The B/W then flows through a secondary filter tray which further treats the water reducing the TSS & BOD and also reducing the particle size, in the TSS, to less than 1mm. This secondary treatment tray acts as an in-built outlet filter AS/NZS 1546 1:2008 Clause D3.3. and has a minimum life expectancy of 15 years. It then flows into the Dose Treatment Chamber where it is combined with the grey water (G/W) and settlement and filtration takes place. Its final treatment, through an aerating matrix filter, brings its treatment level up to meet the 20/30 BOD/TSS, Secondary Treatment criteria and it is then reintroduced into the environment in accordance with AS/NZS 1547:2012 and the relevant local authorities’ requirements.
The G/W, which is separated at its source from the B/W, flows first into the Grey Water Treatment Tank that retains the bulk of the scum and solids and then trickle filters through an aerating matrix filter and layers of natural media. It is then combined with the B/W in the Wormorator® Chamber for disposal in accordance with AS/NZS 1547:2012 This filter chamber has a buffering capacity of 1000ltrs to contain any surge flows.
The size and extent of the disposal system is determined by the receiving environment and the expected flow volumes. Factors such as soil types, slope and the proximity of potentially sensitive environments such as creeks, wells, bores and other water ways determine the extent, location and type of disposal system chosen.
The Wormorator® and associated dose tank has a 2000ltr reserve capacity where pump loading is necessary to allow for 24hrs emergency storage should a pump fail. The operating capacity of the NaturalFlow Series NF11000 Treatment System is 2000ltrs per day of combined Black and Grey water.
Because the Wormorator® is a dry vault system there is negligible sludge build up so it does not require any regular de-sludging. This specifically meets clause AS/NZS 1547:2012 4.2.2.1 as to de-sludging requirements.
See our website: www.naturalflow.co.nz NATURALFLOW SERIES NF11000
System Specification & Installation Instructions
New Zealand’s Leaders in Eco-Sustainable, Odourless Wastewater and Sewage Systems
Wormorator® & Dose Chamber Specifications
Tanks are made of Cotene 9050 which is a linear medium density polyethylene, designed specifically for rotational molding of large tanks and products that require a high level of rigidity. It contains a fully formulated long term UV stabilization package (with a minimum UV8 rating) and is suitable material for wastewater treatment containment meeting all the requirements of Section 4.3.3 of AS/NZS 1547:2012 which cross references the structural performance requirements of its section 2.4.2.3 back to the relevant provisions of AS/NZS 1546.1, which for plastic septic tanks constructed via by rotational molding using thermoplastics (polyethylene) are set out in Section 9 of that Standard. These tanks have an expected lifespan of 50 years.
SXL5000 Wormorator® Module Dose Chamber 4000ltrs Nominal capacity 1500ltrs Nominal capacity 1800mm Diameter over main body 1200mm Diameter over main body 2200mm over feet 732mm Riser Diameter 1700 mm O/A height 2125mm O/A height
Grey Water Treatment Tank 1200ltrs Nominal capacity 1200mm Diameter over main body 1700mm O/A height Installation Location and Certification
These tanks are not designed for vehicle loads and shall be located no closer than 1.50m to a driveway, road frontage or a building. If for any reason the tank is located where vehicle traffic may drive over the tank or approach closer than 1.50m, or where it may be trampled on by farm stock then the tank should be protected by a concrete slab designed to support these loads. Surface water must also be diverted from flowing into the installation.
Installation must be certified to AS/NZS 1547:2012, the certificate to be issued and held by the regulatory authority.
High Water Table Installations
All tanks have been engineered and designed with support ribbing for maximum strength, in accordance with the NZC 3604. Clauses B1 and B2 for structure and durability, to withstand any hydraulic pressures, both lateral and uplift, created by high water table conditions, even when the tanks are completely empty at install stage.
As per the NaturalFlow Systems installation instructions, in these conditions, tanks must be anchored in with concrete around base, as per the installation instructions, to height as specified.
Plumbing Pipes and Fittings
All internal plumbing is done with PVC pipes with appropriate connections according to AS/NZS 1260 and AS/NZS 4130.
If in doubt contact the experts on 0800 628 356 or [email protected] NATURALFLOW SERIES NF11000
System Specification & Installation Instructions
New Zealand’s Leaders in Eco-Sustainable, Odourless Wastewater and Sewage Systems
Backfill and Bedding
Place and bed to NZBC G13/AS2, using compacted granular metal, in layers not exceeding 100mm.
Electrical
Where a pump is required on a flat site electrical connection must be installed according to AS/NZS 3000 and the control and alarm system must be in a weatherproof housing located in a readily visible position.
Warranty
WATERFLOW NZ LTD warrants that the NaturalFlow System will be free from defects in material and workmanship for the following periods of time from the date of installation as set out in the following conditions:
1. Roto-Molded tanks 15yrs 2. Filter media 15yrs 3. Dosing float/and or pumps 2yrs 4. WATERFLOW NZ LTD will at its discretion replace or repair such components that prove to be faulty with the same or equivalent part at no charge. 5. Warranty of operation covers the performance of the NaturalFlow systems as connected to the effluent inflow for which they are designed, and also installed to the criteria as set out in the relative installation instructions and procedures.
Warranty excludes defects due to:
A) Failure to use the system in accordance with owner’s manual. B) A force majeure event outside the reasonable control of WATERFLOW NZ LTD such as (but not limited to) earthquake, fire, flood soil subsidence ground water table variations or plumbing fault. C) Modifications to surrounding landscape contours after installation D) The actions of a third party E) The system required to bear loads (either hydraulic or biological) greater than that for which it was designed F) Any modifications or repairs undertaken without the consent of WATERFLOW NZ LTD G) Failure, where applicable, to fence and plant land application system (disposal field)
1st June 2014 Dean Hoyle Managing Director
See our website: www.naturalflow.co.nz NATURALFLOW SERIES NF11000
System Specification & Installation Instructions
NaturalFlow Series NF11000 Dose Installation Instructions
The NaturalFlow system is to be installed or signed off by a registered Drain layer to the design specified by Waterflow NZ Ltd.
The following installation instructions and procedures followed correctly will ensure System performance is not compromised in any way.
1. Excavate a 2.5m diameter level platform for the Wormorator® at the appropriate depth to ensure adequate fall for inlet pipe from the source. This has to be installed on virgin ground.
2. Lay 100mm of bedding metal on platform and place Wormorator®. Do this before excavating for dose chamber as this helps keep the excavations to a minimum.
3. Analyze where the dose chamber needs to be placed (this needs to line up with one of the feet at the base of the WORMORATOR®) and excavate a 1.3m diameter level platform 550mm below the Wormorator platform (this allows for 100mm of bedding material).
4. Very carefully drill a 127mm hole with a hole saw at the lowest point of the foot on Wormorator and fit Uniseal (see Uniseal instruction details appendix B below).
5. Lay 100mm of bedding metal on dose chamber platform and place tank.
6. Measure the distance between the Wormorator outlet and dose chamber inlet allowing 50mm both ends to insert into tanks. Mark pipe before inserting to ensure there is 50mm of pipe inside both tanks also fit the directional junction with flow being towards dose chamber.
7. Fit enough riser pipe to directional junction, to bring it up to grey water outlet level.
8. Trench from Dose Chamber outlet to disposal field, ensuring there is a constant fall from outlet to disposal field.
9. Where possible excavate a trench away from System and lay drain coil and drainage metal at the base of the system to drain away any surface or ground water. On a flat or high water table site System must be bedded in as per appendix A below.
10. Take a minimum of 3 photos at this point to showing connections and back fill, to ensure correct installation for sign off.
11. Back fill around the installed tanks until the required depth for the Grey Water module is reached, then excavate a level platform off 1.5m diameter and position tank on 100mm of bedding material and connect to ‘riser’.
12. Back fill around tanks with pea-metal or similar. DO NOT back fill with soil or clay of any type as this can cause point pressure on the modules, through expansion and contraction, and will cause distortion.
Caution: System must be protected from excessive super imposed loads both lateral and top loads. E.g. loads from vehicular traffic. There needs to be at least 2m of clearance maintained around system.
Worms: Ensure adequate moisture in the Wormorator® and add worms once installed unless systems is not going to be used within 2 months of installation.
If in doubt contact the experts on 0800 628 356 or [email protected] NATURALFLOW SERIES NF11000
System Specification & Installation Instructions
NaturalFlow Series NF11000 Pump Installation Instructions
The NaturalFlow system is to be installed or signed off by a registered Drain layer to the design specified by Waterflow NZ Ltd.
The following installation instructions and procedures followed correctly will ensure System performance is not compromised in any way.
1. Excavate a 2.5m diameter level platform for the Wormorator® at the appropriate depth to ensure adequate fall for inlet pipe from the source. This has to be installed on virgin ground.
2. Lay 100mm of bedding metal on platform and place Wormorator®. Do this before excavating for dose chamber as this helps keep the excavations to a minimum.
3. Analyze where the dose chamber needs to be placed (this needs to line up with one of the feet at the base of the WORMORATOR®) and excavate a 1.3m diameter level platform 550mm below the Wormorator platform (this allows for 100mm of bedding material).
4. Very carefully drill a 127mm hole with a hole saw at the lowest point of the foot on Wormorator and fit Uniseal (see Uniseal instruction details appendix B below).
5. Lay 100mm of bedding metal on dose chamber platform and place tank.
6. Measure the distance between the Wormorator outlet and dose chamber inlet allowing 50mm both ends to insert into tanks. Mark pipe before inserting to ensure there is 50mm of pipe inside both tanks also fit the directional junction with flow being towards dose chamber.
7. Fit enough riser pipe to directional junction, to bring it up to grey water outlet level.
8. Where possible excavate a trench away from System and lay drain coil and drainage metal at the base of the system to drain away any surface or ground water. On a flat or high water table site System must be bedded in as per appendix A below.
9. Take a minimum of 3 photos at this point to showing connections and back fill, to ensure correct installation for sign off.
10. Back fill around the installed tanks until the required depth for the Grey Water module is reached, then excavate a level platform off 1.5m diameter and position tank on 100mm of bedding material and connect to ‘riser’.
11. Trench from Dose Chamber outlet to disposal field, ensuring there is a constant fall from outlet to disposal field.
12. Back fill around tanks with pea-metal or similar. DO NOT back fill with soil or clay of any type as this can cause point pressure on the modules, through expansion and contraction, and will cause distortion.
Caution: System must be protected from excessive super imposed loads both lateral and top loads. E.g. loads from vehicular traffic. There needs to be at least 2m of clearance maintained around system.
Worms: Ensure adequate moisture in the Wormorator® and add worms once installed unless systems is not going to be used within 2 months of installation.
See our website: www.naturalflow.co.nz NATURALFLOW SERIES NF11000
System Specification & Installation Instructions
Appendix A and B
Appendix A
High Water Table: For installation in high water table areas, make sure you have a pump to pump away ground water whilst installing. Excavate a pump cavity to one side of the platform and pump ground water away during entire installation process .Half fill dose tank with water, this will flow back into Wormorator as well and will help with resisting the hydraulic uplift (ensure that Wormorator is not completely flooded). Either lay 2-3m3 of concrete around the base of the tanks or mix 3 bags of cement/cube of GAP20 (or similar) metal to form a mass to stop any hydraulic uplift. Leave water in tanks for at least 12 hours after installation is completed and then pump out to allow Wormorator to dry out.
Appendix B
Instructions for fitting UNISEAL®
1. Cut hole to the Hole saw size indicated for the UNISEAL® you are using. Either 127mm hole for a 4”/100mm pipe or 67.2mm hole for a 2”/50mm pipe.
2. Ensure that the hole is clean cut with sharp edges. Irregularities could cause poor seating and ultimate leakage.
3. Insert the UNISEAL® into the hole with the wide side facing the pipe to be inserted.
4. Make certain that the pipe end to be inserted is clean cut. File the edges so that there are no sharp points to cut UNISEAL®.
5. Using Detergent, lubricate the outside of the pipe end to be inserted, then push the pipe through the UNISEAL® from the large flange side. The detergent will be squeezed off as the pipe passes through the UNISEAL®. The co-efficient of friction of the rubber holds the pipe tightly in place.
Side Elevation: Outside Inside
Pipe
If in doubt contact the experts on 0800 628 356 or [email protected] NATURALFLOW SERIES NF11000
System Specification & Installation Instructions
NaturalFlow Series NF11000 Flow Charts
NaturalFlow Series NF11000 Treatment System Dose
750mm Dia Lid Grey Black 1800 Water Water from from House House
2100 0
1630
1630 Matrix Filter
Secondary 1260
470
To Disposal Field as per AS/NZ 1547:2012 or 2200 relevant Local Authority 1260 requirements
NaturalFlow Series NF11000 Treatment System Pump
750mm Dia Lid Grey Black 1800 Water Water from from Secondary House House
To Disposal Field as per AS/NZ 1547:2012 or
relevant Local Authority
2100 0
requirements 1630
1630
Matrix Filter 1260
470
2200 1260
Copyright Waterflow New Zealand Limited 2012©
See our website: www.naturalflow.co.nz
“We do it simpler”
Call us today to discuss your needs 0800 628 356 Or for more information www.naturalflow.co.nz
Head Office South Island Office Waterflow NZ Ltd NaturalFlow South Ltd, PO Box 24, 1160 State Highway 12, 15B Wilkinsons Road, Maungaturoto 0547, New Zealand Harewood, Christchurch 8051 P. 09 431 0042 P. 03 323 8541 E. [email protected] E. [email protected] www.naturalflow.co.nz by Waterflow NZ Ltd
“We do it simpler”
2020
Home Owner Care Guide HOMEHOME OWNERS OWNERS MANAGEMENT CARE GUIDE PLAN • Contents
To The Home Owner …3
Waterflow NZ Ltd Warranty …4
Caring For Your Wastewater And Sewage System …5
In A ‘Nutshell’… …8
Emergency Alrm Checklist …9
Household Cleaning Chemicals …10
Cleaning Substitues …11
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Thank you for choosing a NaturalFlow System to treat and care for your on-site sewage and wastewater.
NaturalFlow is a truly natural living system that uses well-established, sustainable processes to treat both solid and liquid waste. Nature is one huge recycling mechanism and NaturalFlow harnesses these forces that have been working together for thousands of years and continue to do so today, working with our Grey water comes Black water comes from Laundry, from toilet and environment, to treat your wastewater. Baths, Showers and Kitchen Sink The system does not draw on any other Hand Basins resources and does not use external power in any of the treatment processes. Wormorator™ Vermiculture We would encourage you to monitor and module care for your NaturalFlow system yourself with our backing and support and by doing NaturalFlow NaturalFlow so you will learn how your system works Treatment Processes Treatment Processes and operates and how to keep it in top working order. As with all living organisms Treated Black and Grey Water blended together a little care and supervision will ensure for nal disposal into the soil that it will run at peak performance for as per Council RegulaƟons many years.
The system accommodates and works with all of today’s conveniences such as conventional toilets, ‘waste master’ units from the kitchen and more. All domestic wastewater can be taken care of and even on steep and difficult sites with poor soakage; NaturalFlow will deliver consistent results year after year. Kind regards, nature, ove Stay L c The NaturalFlow Team lo se
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S u 0800 628 356 www.naturalflow.co.nz I yo 3 t will never fail HOMEHOME OWNERS OWNERS MANAGEMENT CARE GUIDE PLAN • Waterflow NZ Ltd Warranty
WATERFLOW NZ LTD warrants that the NaturalFlow System will be free from defects in material and workmanship for the following periods of time from the date of installation as set out in the following conditions: 1. Roto-Moulded tanks 15yrs 2. Filter media 15 yrs. 3. Dosing float and/or pumps 2yrs 4. WATERFLOW NZ LTD will at its discretion replace or repair such components that prove to be faulty with the same or equivalent part at no charge. 5. Warranty of Operation covers the performance of the NaturalFlow System as connected to the effluent inflow for which they are designed, and has been installed to the criteria as set out in the relative installation instructions and procedures, and has an assigned Service/Maintenace contract in place with Waterflow NZ Ltd or it’s appointed agent/s. Warranty excludes defects due to: A) Failure to use the system in accordance with owner’s manual. B) A force majeure event outside the reasonable control of WATERFLOW NZ LTD such as (but not limited to) earthquake, fire, flood, soil subsidence, ground water table variations or plumbing fault. C) Modifications to surrounding landscape contour after installation D) The actions of a third party E) The system required to bear loads (either hydraulic or biological) greater than that for which it was designed F) Any modifications or repairs undertaken without the consent of WATERFLOW NZ LTD G) Failure, where applicable, to fence and plant disposal field.
Dean Hoyle Managing Director.
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Home Owner Care Role The Home owner is greatly encouraged to maintain a monthly visual check of the operation of their system and to make sure their land application systems are maintained in good condition. 1. Industry recommendation is to have a maintenance contract in place at all times 2. Visual check of treatment system 3. Visual check of land application system 4. Notify Waterflow NZ of any issues
Inspection Checklist: When checking the system operation, take particular note of; 1. Wormorator build-up. Six monthly level should be no higher than 200mm below inlet pipe (simple observation through lid adequate). 2. Field performance, particularly looking for any undue odours or effluent breakout (flush field lines 2–3 monthly). 3. All electrical parts (if applicable). Ensure all pump alarms are working. 4. Check Grey Water and Dose tank outlet filter for any build-up. 5. Check Aerating Bio-Filter charge tank (1200 pump) for correct operation (simple observation through lid adequate) and that the plants themselves look healthy and lush (these can be trimmed if desired to keep looking tidy).
Did you know… …that as a homeowner you’re responsible to make sure your wastewater system gets the required maintenance needed to protect the investment in your home? This guide will help you care for your wastewater system. It will help you understand how your system works and what steps you can take as a homeowner to ensure your system will work efficiently.
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Components of Your Complete Wastewater Septic System A typical wastewater septic system has two main components: a Wastewater and Sewage Treatment System and a Land Application System (or disposal field)
The NaturalFlow System treats and reduces the solid content of the wastewater by up to 95%. The wastewater liquid then flows to the disposal field, where it percolates into the soil, and microbes provide final treatment by removing harmful bacteria, viruses, and nutrients before it eventually reaches the groundwater ecosystem, and the cycle begins again.
Efficient terWa Use – ‘it does make a difference’ Average indoor water use in the typical single-family home is approximately 180ltrs per person per day. The more water a household conserves, the less water enters the septic system. Efficient water use can improve the operation of the wastewater system and reduce any risk of disposal field overload.
High-efficiency toilets Toilet use accounts for 25 to 30 percent of household water use. Do you know how many litres of water your toilet uses to flush? Most older homes have toilets with 11+ litre reservoirs, while newer high-efficiency dual flush toilets use 6.3/5.5ltrs or down to 4.5/3ltrs of water per flush. N.B. Did you know leaky toilets can waste as much as 700ltrs each day.
Consider reducing the volume of water in the toilet tank with a volume displacer (fancy name for a brick, stone etc!) if you don’t have a high-efficiency model, or replacing your existing toilets with high- efficiency models. Check to make sure your toilet’s reservoir isn’t leaking into the bowl. Add five drops of liquid food colouring to the reservoir before bed. If the dye is in the bowl the next morning, the reservoir is leaking and repairs are needed.
Water fixtures A small drip from a faucet may add many litres of unnecessary water to your system every day. To see how much a leak adds to your water usage, place a cup under the drip for 10 minutes. Multiply the amount of water in the cup by 144 (the number of minutes in 24 hours, divided by 10). This is the total amount of clean water travelling to your septic system each day from that little leak.
Faucet aerators and high efficiency showerheads u ve nat re, Sta Faucet aerators help reduce water use and the volume of water entering your Lo y c lo se septic system. High-efficiency showerheads also reduce water use.
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Washing machines By selecting the proper load size, you’ll reduce wastewater. Washing small loads of laundry on the large-load cycle wastes precious water and energy. If you can’t select load size, run only full loads of laundry. N.B. A new Energy Star washing machine uses 35 percent less energy and 50 percent less water than a standard model.
Watch your drains! What goes down the drain can have a major impact on how well your wastewater system works.
What shouldn’t you flush down your toilet? Dental floss, feminine hygiene products, diapers, cotton swabs, cigarette butts, cat litter, and other kitchen and bathroom items that can clog and potentially damage septic system components if they become trapped. Flushing household chemicals, gasoline, oil, pesticides, antifreeze, and paint can also stress or destroy the biological treatment taking place in the system or might contaminate surface or ground waters.
Care for your Land Application System Your land appliaction system is an important part of your wastewater system. Here are a few things you should do to maintain it: • Flush driplines regularly – every 3 months recommended • Plant only recommended wetland plants over and near your wastewater system. Roots from nearby trees or shrubs might clog and damage the drainfield • Don’t drive or park vehicles on any part of your wastewater system. Doing so can compact the soil in your drainfield or damage the pipes, tank, or other septic system components • Do not build any structures over it or seal it with concrete, asphalt etc • Keep roof drains, basement sump pump drains, and other rainwater or surface water drainage systems away from the drainfield. Flooding the drainfield with excessive water slows down or stops treatment processes and can cause plumbing fixtures to back up • Trees with very aggressive roots, such as willows, should be kept well away from the disposal system, see page 11 for list of recommended plantings • A soggy drainfield won’t absorb and neutralize liquid waste. Plan landscaping, u roof gutters and foundation drains so that excess water is diverted away from ve nat re, Sta Lo y c the Land Application System lo se
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S u 0800 628 356 www.naturalflow.co.nz I yo 7 t will never fail HOMEHOME OWNERS OWNERS MANAGEMENT CARE GUIDE PLAN • In A ‘Nutshell’…
DO… • If your system requires power supply make sure this remains on continuously. • Check faucets and toilets for leaks; make repairs if necessary • Use low flush toilets where possible • Use a ‘displacer’ to reduce the amount of water needed to flush older toilets • Use aerators on faucets and flow reducer nozzles on showers to help lower water consumption • Reduce water levels for small loads of laundry • Wait until the dishwasher is full to run it • Densely plant your field to maximise transpiration • Perform regular monthly visual checks of your system and field • Grass should be mowed or trimmed regularly to optimize growth and prevent the grass from becoming rank • Use signs, fences and/or plantings to prevent any vehicle or stock access • Keep records of all maintenance undertaken on the wastewater systems • Monitor and care for your Wastewater System as per instructions in the home owner’s manual • You are welcome to install a Waste Master in your kitchen sink. The worms love it!! DO NOT… • Switch off power unless servicing • Use chlorine based disinfectant & cleaning products in the toilets or kitchen sink (Cleaners high in chlorine, phosphorous or ammonia must not be used) • Over use heavy cleaners that kill beneficial bacteria in the septic system • Pour any toxic/strong chemicals (paint, oil, grease, paint thinners or pesticides) down any drains • Pour strong or large volumes of acid down any drains. These include: vinegar, brine, lemon juice. • Flush down your toilet - Dental floss, feminine hygiene products, diapers, wipes, cotton swabs, cigarette butts, cat litter, dog poo, and other kitchen and bathroom items • Discard any drugs down the sink or toilet • Empty rubbish bags into Wormorator • Alter or add any part of your system without Waterflow NZ LTD’s approval
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S u 8 I yo 0800 628 356 www.naturalflow.co.nz t will never fail HOMEHOME OWNERS OWNERS MANAGEMENT CARE GUIDE PLAN • Emergency Alarm Checklist
Systems with a discharge pump will have a high level alarm This alarm alerts the home owner that the pump out has failed, causing the water level to rise in the tanks.
There 5 simple steps to take in view of determining the cause of the problem:
1. Check the power is switched on at the pump 2. Check the plug is firmly in the socket 3. Check the main switch board to ensure no fuses have been tripped 4. If your system has a disc filter, ensure that it has been cleaned. Blocked disc filters can restrict the pump and cause failure 5. Call a NaturalFlow service technician. Our number is at the bottom of every page
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S u 0800 628 356 www.naturalflow.co.nz I yo 9 t will never fail HOMEHOME OWNERS OWNERS MANAGEMENT CARE GUIDE PLAN • Household Cleaning Chemicals
Effects on Wastewater and Disposal System Receiving Environments Use of many cleaning chemicals in facilities served by on-site disposal systems, can result in high concentrations of the constituents in those cleaning agents being discharged into the receiving soils. These chemicals and constituents can have a massive impact on the quality and condition of the receiving soils over time.
Many of the chemicals can disrupt soil structure and decrease hydraulic conductivity while others can act as bactericides, destroying the essential micro-organisms required to achieve the high level of biodegradation in the treatment and disposal systems.
The following matters need to be considered when using cleaning agents in a domestic situation: • Laundry powders are often extremely high in sodium which will destroy the salt balance in the soils. Check the labels for low sodium and phosphorous contents. • Wastewater flow from dishwashing machines can have an impact on wastewater treatment systems, in terms of the strong cleaning chemicals used, so check labels for low sodium products • Highly corrosive cleaners (such as toilet and drain cleaners) that have precautionary labels warning users to minimise direct contact, are an indication that they can adversely affect the wastewater treatment system. Up to 1 cup of bactericides such as bleach can be sufficient to impact on all the microorganisms/bugs in a septic system.
Recommended Cleaning Brands:
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S u 10 I yo 0800 628 356 www.naturalflow.co.nz t will never fail HOMEHOME OWNERS OWNERS MANAGEMENT CARE GUIDE PLAN • Cleaning Substitutes
Substitutes For Household Cleaning Chemicals (Ref TP58) Use of the following readily biodegradable substitutes for common potentially harmful household cleaning chemicals will reduce the stress on any wastewater system, significantly enhance the performance of the whole system and increase the life of the land application system, while reducing the potential effects of the receiving soils.
General Cleaners Use soft soap cleaners and bio-degradable cleaners and those low in chlorine levels. Contact us for a new biological cleaner that will help you system..
Ammonia-Based Cleaners Instead sprinkle baking soda on a damp sponge.
Disinfectants In preference use Borax (sold in most Bin Inn stores): ½ cup in 4-litres of water.
Drain De-Cloggers Avoid using de-clogging chemicals. Instead use a plunger or metal snake, or remove and clean trap. Contact us for very effective, worm friendly, drain cleaning products..
Scouring Cleaners and Powders Instead sprinkle baking soda on a damp sponge or add 4-Tbs baking soda to 1-Litre warm water. It’s cheaper and won’t scratch.
Toilet Cleaners Sprinkle on baking soda, then scrub with toilet brush.
Laundry Detergent Choose one with a zero phosphate content and low in alkaline salts (in particular, a low sodium level) and no chlorine.
Oven Cleaners u Sprinkle salt on drips, then scrub. Use baking soda and scouring pads on ve nat re, Sta Lo y c lo older spills. se
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S u 0800 628 356 www.naturalflow.co.nz I yo 11 t will never fail by Waterflow NZ Ltd “We do it simpler”
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S u I yo t will never fail Call us today to discuss your needs 0800 628 356 Or for more information www.naturalflow.co.nz
Head Office South Island Office Waterflow NZ Ltd NaturalFlow South Ltd, PO Box 24, 1160 State Highway 12, 82 Johns Road, Maungaturoto 0547, New Zealand Belfast, Christchurch 8051 P. 09 431 0042 P. 03 323 8541 E. [email protected] E. [email protected] www.naturalflow.co.nz Appendix 3: Record of Title
SHELDON – DEEMING ROAD
Appendix 4: Site Photographs
Photograph 1: View over site from Deeming Road.
Photograph 2: Photo of Site Taken from Entrance off Deeming Road.
SHELDON – DEEMING ROAD
Photograph 3: View towards vegetated area on the site. Neighbouring House is visible on the left.
Photograph 4: Recent Photograph showing Building Platform for Existing Garage.
SHELDON – DEEMING ROAD Appendix 5: Fire & Emergency NZ Written Approval
SHELDON – DEEMING ROAD