Table of Contents Page

Section 1 Introduction

1.1 Purpose of This Volume 31.2 EffluentDischargeStandardsandRequirements 41.3 WhoShouldUseThisVolume 41.4 RelatedReferenceMaterial 5

Section 2 General Guidelines

2.1 InitialConsultation 92.2 WhereaPublicSewerisAvailable 92.3 WhereNoPublicSewerisAvailable 92.4 HomesteadDevelopments 10

2.4.1 SingleDevelopmentupto30Unitsor150PE 10 inTotal

2.4.2 SingleDevelopmentOver30UnitsinTotal 10 WithAverageHousingDensityGreaterThan FiveUnitsperHectare

2.4.3 SingleDevelopmentOver30UnitsinTotal 10 withAverageHousingDensityLessThan FiveUnitsperHectare

2.4.4 IndividualDevelopmentOutsideLocal 11 AuthorityAreas

Section 3 Design Guide

3.1 General 153.2 Planning 16

3.2.1 SiteSelection 163.2.2 MaintenanceVehicleAccess 173.2.3 SafetyRequirements 183.2.4 DesludgingWorks 183.2.5 LocationofSepticTankwithinPremise 18

ofProperty3.2.6 InspectionChamber 193.2.7 SepticTankDrawings 193.2.8 FutureConnectiontoPublicSewersfromProposed/ 20 ExistingSepticTank

3.3 Design

3.3.1 VolumetricCapacity 213.3.2 Compartmentalization 223.3.3 InletandOutlet 233.3.4 EffluentDischarge 243.3.5 HeadRoom 243.3.6 Covers 253.3.7 Construction 253.3.8 PrincipalDimensionsforCastIn-SituSepticTank 263.3.9 PrincipalDimensionsforPrefabricatedSepticTank 26

3.4 Non-proprietarySystems 27

3.5 ProprietarySystems 27

3.5.1 TankMaterial 283.5.2 TankFabricationandConstruction 293.5.3 InspectionChamberandSepticTankCovers 293.5.4 Ventilation,InletandOutletPipes 293.5.5 FilterChamberandFilterMedia 303.5.6 Marking/Labelling 303.5.7 BaseofSepticTank 313.5.8 Installation 313.5.9 TestingofSepticTanks 32

Section 4 Septic Tanks Located in Sensitive Receiving Watercourses

4.1 General 354.2 FurtherTreatmentMethodsForAchievingHigherEffluent 35

Quality4.3 Disinfection 36

Appendices

AppendixA RecommendedPopulationEquivalent 39

AppendixB EffluentDischargeStandardstoMalaysianInlandWaters 42

AppendixC TypicalLayoutUsingRearAccess 43 (BungalowandFactory)

AppendixD TypicalLayoutUsingRearAccess 44 (TerraceHouse,ShopHouseandCommercialBuilding)

AppendixE TypicalLayoutUsingFrontAccess 45 (TerraceHouse,ShopHouseandCommercialBuilding)

AppendixF LayoutshowingBypasstoPublicSewer 46 (forallapplicabledevelopmentsincludingTerraceHouses)

AppendixG DetailsShowingBypasstoPublicSewer 47

AppendixH TypicalConcreteSepticTankDiagram(PE≤12) 48

AppendixI TypicalConcreteSepticTankDiagram(12<PE≤30) 49

AppendixJ TypicalofaProprietarySepticTank 50

AppendixK TypicalBedSystemforSoilAbsorption 51

AppendixL TypicalMoundSystemforSoilAbsorption 52

AppendixM TypicalBuriedIntermittentSandFiltersforEffluentPolishing 53

AppendixN ListofReferencesonFurtherTreatmentMethods 54

AppendixO TypicalLayoutforHomesteadUnitWithSepticTank& 55 FurtherTreatmentFacilities