If Class 4 sanitary sewage system cannot be installed on a new property and the owner wants to construct a Class 5 system, would a Class 5 be permitted under the Building Code in this situation?

If Class 4 sanitary sewage system cannot be installed on a new property and the owner wants to construct a Class 5 system, would a Class 5 be permitted under the Building Code in this situation?

• A. Yes, always
• B. No, because it is prohibited except under listed conditions
• C. Yes, with owner consent
• D. Only with environmental approval

Answer: (B)

The Building Code treats certain on-site sewage systems as standard or restricted to specific circumstances. Class 5 falls into that restricted category: it isn’t allowed by default, and a system outside the normal (Class 4) options is only permitted if the Code explicitly lists conditions under which it can be approved. If those listed conditions aren’t met, you can’t install a Class 5. So, in this situation, since Class 4 can’t be used on a new property, trying to use Class 5 would only be allowed if the Building Code has specific listed conditions that authorize it. If those conditions aren’t satisfied, it’s not permitted. Ownership approval or environmental approval alone doesn’t override that rule; they’re not substitutes for the Code’s explicit allowances.

The Building Code treats certain on-site sewage systems as standard or restricted to specific circumstances. Class 5 falls into that restricted category: it isn’t allowed by default, and a system outside the normal (Class 4) options is only permitted if the Code explicitly lists conditions under which it can be approved. If those listed conditions aren’t met, you can’t install a Class 5.

So, in this situation, since Class 4 can’t be used on a new property, trying to use Class 5 would only be allowed if the Building Code has specific listed conditions that authorize it. If those conditions aren’t satisfied, it’s not permitted. Ownership approval or environmental approval alone doesn’t override that rule; they’re not substitutes for the Code’s explicit allowances.