Note: Under s. 145.01(12), Stats., "private sewage system" means a sewage treatment and disposal system serving a single structure with a septic tank and soil absorption field located on the same parcel as the structure. This term also means an alternative sewage system approved by the department including a substitute for the septic tank or soil absorption field, a holding tank, a system serving more than one structure or a system located on a different parcel than the structure. A private sewage system may be owned by the property owner or a special purpose district.
Wis. Admin. Code Department of Safety and Professional Services SPS 316.100
See chs. SPS 361 to 366 for fire-resistance standards.