Construction that is considered to be a modification of wastewater
flow or contaminant load is defined in Ch. SPS 383.25(2)(c)2a and
b, Wis. Adm. Code.
(1) Prior to commencing the construction of an addition to or modification
of a structure which will affect the wastewater flow and/or contaminant
load to an existing private on-site wastewater treatment system, the
owners of the property shall:
(a)
Possess a sanitary permit to construct a new POWTS or modify
an existing POWTS to accommodate the modification in wastewater flow
or contaminant load; or
(b)
Provide the following to the Department:
1.
Documentation that a POWTS of adequate capability and capacity
to accommodate the wastewater flow and contaminant load already exists
to serve the structure, as specified in Ch. SPS 383, Wis. Adm. Code;
2.
Documentation showing that the location of the proposed structure
conforms to the applicable setback distances to all of the existing
POWTS components; and
(2) Any installation, addition or modification of a system must be completed
and accepted before the addition or modified area of the structure
may be occupied.
Prior to commencing construction of any structure or addition
to a structure on a site where there exists a POWTS, the owner or
his agent shall determine that the proposed structure conforms with
applicable setback limitations of Ch. SPS 383, Wis. Adm. Code. Documentation
shall be submitted as required in Ch. SPS 383, Wis. Adm. Code.