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Who needs it
Sewage system installers (the sewage supervisor named on an installer firm's registration needs only this exam, no legal exam), on-site sewage system inspectors at municipalities, health units and conservation authorities (with GLP or Powers and Duties of CBO), and BCIN designers who design septic systems (with a legal exam).
Free On-site Sewage Systems study guide
One chapter per section of the exam, following the Ministry's study guide for the On-site Sewage Systems exam, in plain language, with every rule linked to the 2024 OBC article it comes from.
- 1Code structure, objectives and referenced documentsDivision A (except application of Part 2, building size determination and designated structures), objectives and functional statements.6 min read
- 2Occupant load and sanitary facilities (Part 3)The Part 3 items that drive sewage flows: occupant load, drainage and grades, plumbing facilities.4 min read
- 3Excavation and site drainageExcavation design, construction, water control, protection and backfill from Part 4.4 min read
- 4Plumbing connections to sewage systems (Part 7)The listed Part 7 items: floor drains, sanitary drainage and water distribution, private sewers and water supply, underground plastic pipe.5 min read
- 5Part 8 general: scope, classes and limits on dischargeScope and application of Part 8, its definitions, and limits on what may be discharged into a sewage system.4 min read
- 6Design standards: flows, clearances and tanksGeneral design requirements (daily design sanitary sewage flow, clearances to wells, lakes and property lines, access).7 min read
- 7Class 1, 2 and 3 sewage systemsPrivies (earth pit, privy vault, pail and portable privies), greywater systems (Class 2) and cesspools (Class 3).5 min read
- 8Class 4 systems: septic tanks and treatment unitsGeneral requirements for Class 4 systems, septic tank sizing and design, and treatment units with their effluent quality criteria.5 min read
- 9Leaching bedsLeaching bed general and design requirements (loading rates, percolation time T from SB-6, soil and separation to groundwater).7 min read
- 10Class 5 holding tanks, operation and maintenanceWhere holding tanks are allowed and how they are built.5 min read
- 11Existing buildings, renovation and Division C administrationAdditional requirements for existing buildings and change of use, Part 11 compliance alternatives.6 min read
On-site Sewage Systems calculations
The Calculation Lab works through the calculations this exam asks for, step by step, with worked examples and the traps that cost marks.
Practise for the On-site Sewage Systems exam
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- The Calculation Lab
On-site Sewage Systems prep
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