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Application for a wastewater works design approvalTo be read in conjunction with ‘Guidance for submitting an application for a wastewater works design approval’
Document title Application for a wastewater works design approvalContact details Peter RogersApproved by Tracy Ward Date approved 25 October 2019
Version Date Author Changes made
1.0 15/3/18 Peter Rogers & Chris Daly First version
2.0 10/7/18 Peter Rogers Clarify design and maximum flow rates
2.1 25/10/19 Peter Rogers
Exclude OWMS with a maximum domestic wastewater flow > 2000 litres day providing primary treatment to reflect Schedule 4 of Public and Environmental Health Regulations
Acronyms Full formABN Australian Business Number
ACN Australian Company Number
BOD Biochemical Oxygen Demand
DIR Design Irrigation Rate
DLR Design Loading Rate
EP Equivalent Persons
IMP Irrigation Management Plan
JAS/ANZ Joint Accreditation System-Australia and New Zealand
LAA Land Application Area
NATA National Association of Testing Authorities
RWMP Recycled Water Management Plan
SSC Site-and-Soil-Check
SSE Site-and-Soil-Evaluation
WWDA Wastewater Works Design Approval
Application for a wastewater works design approval
ContentsHow to complete this application........................................................................4How to lodge this application.............................................................................41. Application detail...........................................................................................52. General and supporting information................................................................63. Wastewater management system...................................................................74. Installation....................................................................................................95. System certification and performance...........................................................106. Site and soil evaluation................................................................................117. Wastewater disposal....................................................................................128. Large-scale WMS utilising recycled water including third party end use..........149. Dry composting/Wet composting/Hybrid toilets..............................................1510. Supporting documentation.........................................................................15
Application for a wastewater works design approval
How to complete this application The application must be read in conjunction with the Guidance for submitting an
application for a Wastewater Works Design Approval. For all WMS, Sections 1 to 7 must be completed. For systems utilising effluent recycling including third party end use, Section 8 must
also be completed. For dry composting/wet composting/hybrid toilets, Section 9 must also be completed.
How to lodge this applicationThe application, supporting documentation and receipt of fee payment should be mailed or emailed to:Department of HealthPublic Health Directorate:2nd floor, Casuarina Plaza258 Trower Road, Casuarina NT 0810PO Box 40596, Casuarina NT 0811Phone (08) 8922 [email protected]
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
1. Application detailApplicant
Applicant’s name
Applicant’s title
Company/Organisation
ABN ACN
Street No Street name
Suburb/Town/City State Postcode
Postal address Suburb/Town/City
State Postcode
Email Website
Phone Number Mobile Number
Applicant’s signature
Date
Location of wastewater management system (WMS)
Lot No. Street No.
Street Suburb/Town/City
Name of business/building/complex/site
Site specific location details: If further detail required to describe location of WMS on large or complex sites
Type of application
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
Type of application
☐ New WWDA application☐ Variation of the conditions of an existing WWDA:
WWDA Number:
WWDA category
☐ Product approved OWMS (onsite wastewater management system) with a maximum domestic wastewater flow ≤2000 litres/day providing secondary treatment, servicing buildings other than a single residential dwelling (Class 1a)☐ WMS with a maximum domestic wastewater flow >2000 litres day providing secondary treatment☐ Community wastewater management system, i.e. decentralised wastewater system that collects wastewater from more than one property or tenement and treats or disposes to another☐ Waste stabilisation ponds not owned or operated by the NTG☐ Large-scale water recycling scheme☐ Third party irrigation of recycled water sourced from an approved large-scale water recycling scheme or decentralised wastewater system ☐ Composting toilet system or hybrid toilet system servicing buildings other than a single residential dwelling (Class 1a)
2. General and supporting informationProvide a summary of the proposed WMS providing detail of the system loading, treatment technology, effluent disposal system, site location and any site constraints - or attach documents and references
3. Wastewater management systemWastewater treatment types
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
Primary Treatment
☐ Septic Tank☐ Greywater Diversion Device☐ Waste stabilisation ponds☐ Other:
Secondary Treatment
☐ Secondary Treatment System (STS)☐ Greywater Treatment System (GTS)☐ Electro-flocculation☐ Membrane Filtration☐ Ozonation☐ Reed bed☐ Rhizopod☐ Integrated Transpiration System (ITS)☐ Advanced Enviro Septic (AES)☐ Sand Filter☐ Trickling Filter / Packed Bed Reactor☐ Other
Disinfection
☐ Chlorine / Bromine☐ Ultra-Violet Light☐ Ozonation☐ Heat☐ Other
Manufacturer’s detail
Name & model number of the WMS
WMS manufacturer (Company name)
Street Name Suburb/Town/City
State Postcode
Postal Address Suburb/Town/City
Contact Person
Position
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
Website
Contact numbers
WMS loading parameters - Capacity
Maximum domestic wastewater flow the WMS is designed to treat
(L/day)
Maximum organic load the WMS is designed to treat
(g/day)
Total capacity of primary tanks
(L)
Total capacity pump stations
(L)
Total capacity of balance tanks
(L)
Total capacity of secondary tanks
(L)
Details of any pre-treatment devices if trade waste is discharged to the WMS
Type of alarm system
☐ Audible
☐ Visual ☐ SCADA ☐ Electronic notification
☐ Not applicable
WMS loading parameters - Design Flow
Design domestic wastewater flow of the WMSi.e. estimated hydraulic flow to be treated by the WMS
L/day
Design organic load of the WMSi.e. estimated organic load to be treated by the WMS
(g/day)
Number of equivalent persons (EP) serviced by the WMS
Number of sanitary fixtures to be connected to the WMS
Shower Bath Basin Trough Sink Toilet
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
4. InstallationInstallation company
Plumbing Licence/NT Registration No.www.ntlis.nt.gov.au/building-practitioners/
Company/Organisation
Postal Address
Street no PO Box
Street name
Suburb/Town/City
State Postcode
Contact person
Contact number
Phone Mobile
System maintenance
Operator / Maintenance contractor
Postal Address
Street no PO Box
Street name
Suburb/Town/City
State Postcode
Contact Person
Contact numbers
5. System certification and performance
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
Effluent quality
Proposed effluent quality after treatment
BOD5 mg/L
Suspended Solids mg/L
Free Residual Chlorine
mg/L
E. coli cfu/100mL
pH
Product approval and certification
Provide evidence of wastewater treatment including following as applicable, providing documentary evidence with reference in document schedule
Checklist
Detailed description (including schematic) of treatment technology, treatment train and rationale
☐
Engineering certification for the structural soundness of the WMS and its components
☐
Any evaluation report from any appropriate authority, detailing the performance of the WMS (i.e. validation and verification) against test criteria
☐
Contingency measure for malfunctions of the WMS and its components
☐
Copies of the servicing manual, operating manual and the recommended service details required for the maintenance of the WMS and its components
☐
Laboratory analysis reports, e.g. National Association of Testing (NATA) certification
☐
Product certification documentation from an independent product certification agency accredited by JAS/ANZ and/or NSF
☐
Other assessment or accreditation report for the WMS ☐
Additional information
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
6. Site and soil evaluationFor WMS that dispose of treated wastewater to a land application area, a thorough site and soil evaluation must be undertaken and evidence of this provided with the application. DoH recognises two approaches towards this:
Site and soil evaluation in accordance with AS/NZS 1547:2012; or Land Capability Assessment (LCA) in accordance with DoH Guidelines for Land
Capability Assessment for On-site Wastewater Management.
Indicate which approach has been adopted towards site & soil evaluation
Checklist
Site and soil evaluation in accordance with AS/NZS 1547:2012 ☐
Land capability assessment ☐
Site and soil assessment AS/NZS 1547:2012
Provide results of soil testing in accordance with AS/NZS 1547:2012
Attach results of site & soil investigation & reference in document schedule
Soil category and Textural classification
Textural classifications
Sand Sandy loam Loam Clay loam
Silty clay Clay
AS/NZS 1547:2012
1 2 3 4 5 6
Select ☐ ☐ ☐ ☐ ☐ ☐
Land capability assessment
Attach Land Capability Assessment Attach LCA investigation and reference in document schedule
Site assessor detail
Site assessor name
Company
Heritage assessment
Is the site declared as a Yes No If yes, provide a reference in
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heritage place? document schedule ☐ ☐
7. Wastewater disposalDesign Irrigation Rate (DIR)/ Design Loading Rate (DLR)
DIR / DLR utilised for sizing of land application area
Effective area of land application area
Effluent disposal system
Identify the end uses for the treated wastewater, or residual liquid from a dry composting toilet.
☐ Infiltration/soil absorption trench☐ Evapotranspiration bed/trench☐ Mound system☐ Surface irrigation
☐ Soil aquifer treatment☐ Point discharge to waterway☐ Subsurface irrigation☐ Rhizopod system☐ Integrated transpiration system
☐ Passive usage/ornamental☐ Dust suppression☐ Municipal irrigation☐ Other
Setback distances
Setback distances from the land application area to the nearest:
Bore metres Swimming pool metres
Watercourse, Lake, Dam
metres Driveway, paved surface
metres
Building metres Site boundary metres
Setback encroachments on neighbouring properties
Have all neighbouring properties that adjoin the property of the proposed WMS been considered for setback encroachments. Include road reserves, crown land, and private properties?
Yes☐
No☐
If no, then explain below
Easements or covenants
Are there any easements or covenants that will be influenced by the WMS?
Yes No If no, then explain below
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
☐ ☐
Statement of authority of adjoining land owners
Attach a statement of authority of any adjoining land owners whose allotment may be affected by the installation of the WMS.
Yes☐
No☐
Water discharge licence
Does the WMS dispose to a waterway?Yes☐
No☐
If yes, provide evidence of a DENR waste discharge licence
Certifying Engineering (Hydraulic) or Certifying Plumber and Drainer (Design)
Name of Certifying Engineer (hydraulic) or Certifying Plumber and Drainer (Design)In addition to designing the WMS, it is the role of the Certifying Engineer (Hydraulic) or Certifying Plumber and Drainer (Design) to prepare the application including compiling all supporting documentation
Company name
NT Building Practitioner Registration No.www.ntlis.nt.gov.au/building-practitioners/
8. Large-scale WMS utilising recycled water including
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
third party end useProposal outline
Provide an overview of the proposed effluent recycling / reuse scheme including any third party end use or significant risks - or attach documents and references
Effluent quality summary
Nominate the effluent class for recycling purposes appropriate for the end use
A+ ☐ A ☐ B ☐ C ☐ D ☐
Outline of end uses for recycling/reuse
Recycled water management plan
Indicate whether a recycled water management All water recycling systems ☐
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
plan (RWMP) is being submitted with application must have an RWMP
Irrigation management plan
Indicate whether an irrigation management plan (IMP) is being submitted with application
All third party reuse proposals must have an IMP
☐
9. Dry composting/Wet composting/Hybrid toiletsProposed outline
Provide an overview of the proposed dry composting/wet composting/hybrid toilets including product approval details or attach document and reference
10. Supporting documentationSchedule of plans and drawings
Provide a schedule of all drawings and plans included with the application including Site Plan, Land Application Area, aerial photographs, topographic plans and engineering drawings – or attach schedule
Reference
Schedule of supporting documents
Provide a schedule of all included with the Reference
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Application for a wastewater works design approvalQuestions are followed by answer fields. Use the ‘Tab’ key to navigate through. Replace Y/N or Yes/No fields with your answer.
application including land search certificates, brochures, - or attach schedule
Schedule of works
Provide a schedule of all works associated with the proposed WMS – or provide project management plan
Reference
Checklist for plans and drawings
Nominate plans and drawings lodged with the application. All plans and drawings must also be referenced in the schedule of plans and drawings
Provided
Site plan ☐
Topographical plan ☐
Aerial photographs / satellite imagery v
Engineering drawings ☐
Site constraints plan ☐
Land application area ☐
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