The Ontario Building Code | Clearances for a Class 4 or 5 Sewage System
8.2.1.6. Clearances for a Class 4 or 5 Sewage System
(1) Except as provided in Sentences 8.2.1.4.(1) and (2), a treatment unit shall not be located closer than the minimum horizontal distances set out in Table 8.2.1.6.A.
Table 8.2.1.6.A.
Minimum Clearances for Treatment Units
Forming Part of Sentence 8.2.1.6.(1)
| Item | Column 1 Object | Column 2 Minimum Clearance, m |
| 1. | Structure | 1.5 |
| 2. | Well | 15 |
| 3. | Lake | 15 |
| 4. | Pond | 15 |
| 5. | Reservoir | 15 |
| 6. | River | 15 |
| 7. | Spring | 15 |
| 8. | Stream | 15 |
| 9. | Property Line | 3 |
(2) Except as provided in Sentences 8.2.1.4.(1) and (2), a distribution pipe shall not be located closer than the minimum horizontal distances set out in Table 8.2.1.6.B. and these distances shall be increased when required by Sentence 8.7.4.2.(11).
Note: On January 1, 2018, Sentence 8.2.1.6.(2) of Division B of the Regulation is amended by striking out "a distribution pipe" and substituting "the centreline of a distribution pipe or leaching chamber". (See: O. Reg. 139/17, s. 57 (1))
Table 8.2.1.6.B.
Minimum Clearances for Distribution Piping
Note: On January 1, 2018, the heading to Table 8.2.1.6.B. of Division B of the Regulation is amended by adding "and Leaching Chambers" after "Distribution Piping". (See: O. Reg. 139/17, s. 57 (2))
Forming Part of Sentence 8.2.1.6.(2)
| Item | Column 1 Object | Column 2 Minimum Clearance, m |
| 1. | Structure | 5 |
| 2. | Well with a watertight casing to a depth of at least 6 m | 15 |
| 3. | Any other well | 30 |
| 4. | Lake | 15 |
| 5. | Pond | 15 |
| 6. | Reservoir | 15 |
| 7. | River | 15 |
| 8. | Spring not used as a source of potable water | 15 |
| 9. | Stream | 15 |
| 10. | Property Line | 3 |
(3) Except as provided in Sentences 8.2.1.4.(1) and (2), a holding tank shall not be located closer than the minimum horizontal distances set out in Table 8.2.1.6.C.
Table 8.2.1.6.C.
Minimum Clearances for Holding Tanks
Forming Part of Sentence 8.2.1.6.(3)
| Item | Column 1 Object | Column 2 Minimum Clearance, m |
| 1. | Structure | 1.5 |
| 2. | Well with a watertight casing to a depth of at least 6 m | 15 |
| 3. | Any other well | 15 |
| 4. | Spring | 15 |
| 5. | Property Line | 3 |
8.2.2. Treatment and Holding Tanks