Saskatchewan Onsite Wastewater Disposal Guide Third Edition November 2018 saskatchewan.ca TABLE OF CONTENTS Table of Contents ......................................................................................................................................... i Table of Figures ......................................................................................................................................... viii List of Tables ............................................................................................................................................... ix 1 Definitions and Abbreviations ............................................................................................................. x 2 Introduction ........................................................................................................................................ 1 2.1 Disclaimer ................................................................................................................................ 1 2.2 Acknowledgments ................................................................................................................... 1 2.3 Special Acknowledgments ...................................................................................................... 2 3 Goals & Objectives ............................................................................................................................. 3 4 Other Regulations/Bylaws .................................................................................................................. 4 4.1 The Shoreland Pollution Control Regulations, 1976 ............................................................... 4 4.2 Bylaws ..................................................................................................................................... 4 5 Private Sewage Works in Sensitive Areas .......................................................................................... 5 5.1 Description of Sensitive Areas ................................................................................................ 5 5.1.1 Location ............................................................................................................................... 5 5.1.2 Density ................................................................................................................................ 6 5.2 Permissible Solutions .............................................................................................................. 6 6 Site Evaluation .................................................................................................................................... 8 6.1 Requirements .......................................................................................................................... 8 6.1.1 Soils Investigation ............................................................................................................... 8 6.1.2 Site Investigation ................................................................................................................. 9 7 Administrative Requirements .......................................................................................................... 10 7.1 Sewage Disposal in Saskatchewan ........................................................................................ 10 7.2 Requirements ........................................................................................................................ 10 7.2.1 Site Evaluation Report ....................................................................................................... 10 7.2.2 Construction Drawing ....................................................................................................... 11 7.2.3 Operation and Maintenance Manual................................................................................ 11 8 Sewage Volume and Quality ............................................................................................................ 13 8.1 Requirements ........................................................................................................................ 13 8.1.1 Influent Quality ................................................................................................................. 13 8.1.2 Design Flows ..................................................................................................................... 14 9 Piping ................................................................................................................................................ 16 9.1 Description ............................................................................................................................ 16 9.2 Installation ............................................................................................................................ 16 9.3 Requirements ........................................................................................................................ 16 9.3.1 General .............................................................................................................................. 16 9.3.2 Protection from freezing ................................................................................................... 17 9.3.3 Pipe Supports .................................................................................................................... 17 i | Page 9.3.4 Backfill ............................................................................................................................... 17 9.3.5 Piping connections to tank ................................................................................................ 17 9.3.6 Gravity Piping .................................................................................................................... 17 9.3.7 Pipe Certifications ............................................................................................................. 17 10 System Alarms, Controls and Monitoring Systems .......................................................................... 19 10.1 Description ............................................................................................................................ 19 10.2 Requirements ........................................................................................................................ 19 10.2.1 Monitoring Systems .......................................................................................................... 19 10.2.2 Alarms ............................................................................................................................... 19 10.2.3 Control Systems ................................................................................................................ 20 11 Holding Tanks ................................................................................................................................... 21 11.1 Design .................................................................................................................................... 21 11.1.1 Capacity ............................................................................................................................. 21 11.2 Installation ............................................................................................................................ 22 11.2.1 Site Selection ..................................................................................................................... 22 11.2.2 Excavations for Holding Tanks .......................................................................................... 22 11.3 Care and Maintenance .......................................................................................................... 23 11.4 Requirements ........................................................................................................................ 23 11.4.1 General .............................................................................................................................. 23 11.4.2 Sizing ................................................................................................................................. 23 11.4.3 Design ................................................................................................................................ 23 11.4.4 Installation ........................................................................................................................ 24 12 Septic Tanks ...................................................................................................................................... 25 12.1 Function ................................................................................................................................ 25 12.1.1 Removal of Solids .............................................................................................................. 25 12.1.2 Biological Treatment ......................................................................................................... 25 12.1.3 Sludge and Scum Storage .................................................................................................. 25 12.2 Design .................................................................................................................................... 26 12.2.1 Capacity ............................................................................................................................