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1GUIDELINES FOR ENVIRONMENTAL MANAGEMENTDRAFT EPA CODE OF PRACTICE –ONSITE WASTEWATER MANAGEMENTPublication1364December 2010
DRAFT EPA CODE OF PRACTICE —ONSITE WASTEWATER MANAGEMENT2CONTENTSCHAPTER 1 —OVERVIEW OF THE ONSITE WASTEWATERFRAMEWORK........................51.1Purpose...........................................................................................................................51.2Stakeholders....................................................................................................................51.3Wastewater definitions.....................................................................................................51.4Scope..............................................................................................................................61.4.1Exclusions....................................................................................................................................61.4.2Sewered and unsewered areas...................................................................................................61.5Cumulative impacts..........................................................................................................71.6Legal framework..............................................................................................................71.6.1Environment Protection Act 1970.................................................................................................71.6.2State environment protection policies..........................................................................................81.6.3Planning legislation and policies..................................................................................................81.6.4Australian Standards....................................................................................................................91.7Roles and responsibilities................................................................................................91.7.1EPA Victoria..............................................................................................................................101.7.2Local government......................................................................................................................101.7.3Land capability assessors.........................................................................................................111.7.4Building surveyors.....................................................................................................................121.7.5Onsite wastewater system installers.........................................................................................121.7.6Service agents...........................................................................................................................131.7.7Property owners and occupiers.................................................................................................131.7.8Water corporations....................................................................................................................141.8Onsite wastewater treatment system approval processes..............................................141.8.1Manufacturers’ certificate of approval process.........................................................................151.8.2Property owners’ permit process...............................................................................................15CHAPTER 2 —INTRODUCTION TO ONSITE WASTEWATER MANAGEMENT....................162.1 Sewage Management Options............................................................................................162.1.1Unsewered areas......................................................................................................................162.1.2Sewered areas..........................................................................................................................162.1.3Onsite and cluster scale options...............................................................................................172.2Effluent quality standards...............................................................................................182.2.1Primary effluent standard..........................................................................................................182.2.2Secondary effluent standard (20/30/10 and 20/30)...................................................................182.2.3Advanced secondary effluent standard (10/10/10)...................................................................192.2.4Secondary effluent standard with nutrient reduction.................................................................192.3Principles of sustainable water resource management...................................................222.3.1Waste hierarchy........................................................................................................................222.3.2Environmental sustainability......................................................................................................222.3.3Organic matter and nutrients.....................................................................................................222.3.4Salts..........................................................................................................................................222.3.5Small blocks..............................................................................................................................232.3.6No offsite discharge of wastewater...........................................................................................242.4Approved effluent dispersal and recycling systems........................................................24CHAPTER 3 —ONSITE WASTEWATER MANAGEMENT IN UNSEWERED AREAS............26