Table of Contents

1 General

1.1 Purpose Of Standard

1.2 Scope

1.3 Application

1.4 Risk Management Framework

1.5 Structure Of This Standard

1.6 Interpretation

1.7 Referenced Documents

1.8 Legislation

1.9 Definitions

1.10 Abbreviations

1.11 Conversion Of Per Cent Grade, Slope, And Gradient

2 Risk Management Process

2.1 Scope

2.2 Performance Requirement

2.3 The Risk Management Process

2.4 Implementing Risk Management

2.5 Review And Evaluation

3 Roles And Responsibilities

3.1 The Regulatory Authority

3.2 Planners/Surveyors/Land Developers

3.3 Site Evaluators And Soil Assessors

3.4 Designers

3.5 Installation Contractors

3.6 Equipment Manufacturers And Suppliers

3.7 Maintenance And Desludging/Pumpout Contractors

3.8 Property Owners

3.9 Estate Agents And Property Transfer Agents

4 Performance Statements

4.1 Primary Performance Objectives

4.2 Secondary Performance Objectives

4.3 Primary Performance Requirements

5 Design Of On-Site Systems

5.1 Scope

5.2 Site-And-Soil Evaluation

5.3 Design Flow

5.4 Wastewater Treatment Units

5.5 Land Application System Design

6 Construction, Installation, Operation,And Maintenance

6.1 Scope

6.2 Construction And Installation

6.3 Operation, Maintenance, And Monitoring

7 Administrative Guidance

7.1 Administration And Management

7.2 Construction, Installation, And Operation

7.3 Advice And Education

7.4 Reports

Appendix

Appendix A Risk Management Process Guidelines

Appendix B Site-And-Soil Evaluation Procedures

Appendix C Site-And-Soil Evaluation For Planning, Rezoning,And Subdivision Of Land

Appendix D Site-And-Soil Evaluation For Individual Lots

Appendix E Site-And-Soil Properties

Appendix F Dispersive Soil And Sodicity

Appendix G Soil Permeability Measurement– Constant Head Test

Appendix H Typical Domestic Wastewater Flow Design Allowances

Appendix J Recommended Capacities For Septic Tanks

Appendix Kland Application Systems – Guidance On Selection

Appendix L Land Application Methods – Trenches, Beds, And Eta/Ets Systems

Appendix M Land Application Methods – Irrigation Systems

Appendix N Land Application Methods – Mounds

Appendix P Disinfection

Appendix Q Water Balance And Land Application Systems

Appendix R Recommended Setback Distances For Land Applicationsystems

Appendix S Nutrients

Appendix T Operation And Maintenance Guidelines

Appendix U Monitoring Records For On-Site Systems

Appendix V Comparison Of Sectionsbetween As/Nzs 1547:2000 And As/Nzs 1547:2012

Table

Table 1.1slope Conversion Table

Table 3.1implementation Processes And Persons Involved – Essential Stages

Table 5.1determination Of Soil Category

Table 5.2soil Categories And Recommended Design Irrigation/Loading Rates (Dir/Dlr) For Land-Application Systems

Table A1 Examples Of Design Risk Reduction Measures

Table A2 Examples Of Operation And Maintenance Risk Reduction Measures

Table A3 Examples Of Administrative Risk Reduction Measures

Table B1 Summary Of Investigation Procedures

Table B2 Soil Properties

Table D1 Site Assessment Factors – Individual Lot

Table E1 Assessment Of Soil Textures

Table E2 Abundance Of Coarse Fragments

Table E3 Size Of Coarse Fragments

Table E4 Structure

Table H1 Typical Domestic Wastewater Design Flow Allowances – Australia

Table H2 Typical Domestic Wastewater Design Flow Allowancesfor Each Fixture – Australia

Table H3 Typical Domestic Wastewater Design Flow Allowances– Domestic Wastewater From Households – New Zealand

Table H4 Typical Domestic Wastewater Design Flow Allowances– Domestic Wastewater From Commercial Premises – New Zealand

Table J1 All-Waste Septic Tank Operational Capacities

Table J2 Greywater Septic Tank Operational Capacities

Table J3 Blackwater Septic Tank Operational Capacities

Table K1 Land Application Systems – Limitations Due To Site, Soil, And Climatic Factors

Table K2 Selecting The Land Application System To Fit The Site And The Soil

Table L1 Recommended Design Loading Rates For Trenches And Beds

Table L2 Typical Dimensions Of Conventional Trenches And Beds

Table M1 Recommended Design Irrigation Rate (Dir) For Irrigation Systems

Table M2 Recommended Reductions In Dir According To Slope

Table N1 Recommended Mound Design Loading Rates

Table R1 Guidelines For Horizontal And Vertical Setback Distances

Table R2 Site Constraint Scale For Development Of Setback Distances

Table S1typical Nutrient Contributions For Residential Dwellings

Figure

Figure 1.1management Framework For On-Site Systems

Figure 6.1 Example Record Sheet – Septic Tank And Trench System

Figure 6.2 Example Record Sheet – Awts And Irrigation System

Figure 6.3 Emergency Flow Chart

Figure A1 The Risk Management Process

Figure B1 Site-And-Soil Evaluation Form: Excavation Log – Example

Figure C1 Site-And-Soil Evaluation Process For Subdivisions

Figure C2 Slope Configuration And Surface Drainage

Figure D1 Site Plan – Individual Lot – Example

Figure D2 Site Information Sheet – Example

Figure D3 Site-And-Soil Evaluation Form –Individual Lot – Example

Figure E1 Example Of Pore Charts With An Areal Percentage Of 1.5%

Figure G1 Permeameter Assembly

Figure G2 Anti-Scouring Device

Figure G3 Soil Permeability Field Record Sheet – Example

Figure L1 Conventional Piped Trench

Figure L2 Self-Supporting Arch Trench

Figure L3 Boxed Trench

Figure L4 Discharge Control Trench

Figure L5 Conventional Bed

Figure L6 Eta/Ets Bed Details

Figure L7 Eta/Ets Trenches

Figure M1 Drip Irrigation System – Example Layout Of Components

Figure M2 Spray Irrigation System – Example Layout Of Components

Figure M3 Shallow Subsurface Lped Irrigation – Example System

Figure N1 Wisconsin Mound System

Figure Q1 The Natural Water Balance Of Land

Figure R1 Example Of Design And Compliance Boundaries For Applicationof Setback Distances For A Soil Absorption System

Figure R2 Example Of Wastewater Pathways And Site Constraints Forapplication Of Setback Distances For A Soil Absorption System

Figure T1 The Septic Tank And Land Application System

Figure T2 Traditional Septic Tank

Figure U1 Monitoring Form – Site Information

Figure U2 Monitoring Form – On-Site Assessment

Figure U3 Monitoring Form – Soil Investigation