§ 700-080. LOCATION OF ON-SITE SEWAGE SYSTEMS

(a)

Every new on-site sewage system shall meet the minimum horizontal separations shown in Table I, Minimum Horizontal Separations:

Table I Minimum Horizontal Separations (Setbacks)
Items Requiring Setback	From edge of drainfield and replacement area	From septic tank, holding tank, pump tank, and distribution boxes	From undocumented OSS and seepage pits	From building sewer, and non-perforated transport line
Non-public well	100 ft.	50 ft.	150 ft.	50 ft.
Public water supply well 9,10,11	>150 ft.	100 ft.	>150 ft.	100 ft.
Surface water 1,2,12,13	100 ft.	50 ft.	100 ft.	10 ft.
Flood-irrigated crops, Retention ponds	50 ft.	50 ft.	50 ft.	10 ft.
Properly destroyed well	10 ft.	10 ft.	N/A	N/A
Pressurized water supply line	10 ft.	10 ft.	10 ft.	10 ft.
Irrigation/drainage pipe	10 ft.	5 ft.	10 ft.	5 ft.
Swimming Pool	8 ft.	8 ft.	8 ft.	5 ft.
Property line 5,6	10 ft.	5 ft.	10 ft.	N/A
Building foundation	8 ft.	5 ft.	8 ft.	5 ft.
Interceptor or curtain drain/drainage courses/stormwater disposal systems and detention ponds
Down-gradient	50 ft.	10 ft.	50 ft.	N/A
Up-gradient	25 ft.	10 ft.	25 ft.	N/A
Down-gradient cuts or banks with at least 5 ft. of undisturbed soil above a restrictive layer due to a structural or textural change	4x height 50 ft. max	10 ft.	4x height 50 ft. max	N/A
Public Utility Easements	10 ft.	10 ft.	10 ft.	N/A

 

If surface water is used as a public drinking water supply, the designer shall locate the OSS outside of the required sanitary control area.

Measured from the ordinary high water mark.

Before any drainfield can be placed within 100 feet of a well, the owner of record shall obtain a well destruction permit from the Department and have the well destroyed by a licensed well driller.

The LA may approve a water supply line within ten feet of an OSS component if the water line is sleeved in schedule 40 pipe that extends a minimum of ten feet from the OSS component, and is installed above the highest liquid level of any sewage or sewage effluent.

The LA shall require a fifty-foot setback to property lines adjacent to agriculturally viable property from the edge of the drainfield and replacement area to ensure that the OSS is not impacted by flood irrigation. The Health Officer shall also require a fifty-foot setback to property lines from the OSS when individual wells are to be installed and the minimum distance between the drainfield and wells cannot be assured.

The LA may allow on repairs, a reduced horizontal separation to not less than two feet where the property line, easement line, or building foundation is up-gradient.

The item is down-gradient when liquid will flow toward it upon encountering a water table or a restrictive layer. The item is up-gradient when liquid will flow away from it upon encountering a water table or restrictive layer.

The LA may increase the setback to down-gradient cuts or banks with less than five feet of undisturbed soil above a restrictive layer due to a structural or textural change.

If the dispersal system is less than ten feet in depth, then the setback must be greater than 150 feet from public water supply well.

If the dispersal system is greater than ten feet in depth, then the setback must be greater than 200 feet from public water supply well.

If the dispersal system is greater than 20 feet in depth, and less than 600 feet from the public water supply well, then the setback must be greater than the distance for the two-year travel time of microbiological contaminants, as determined by a qualified professional.

If the dispersal system is less than 1,200 feet from a public water system's surface intake, within its drainage catchment, and potentially threatens an intake, then the setback must be greater than 400 feet from the high-water mark of the surface water body.

If the dispersal system is greater than 1,200 feet, but less than 2,500 feet, from public water systems surface water intake, within its drainage catchment, and potentially threatens an intake, then the setback must be greater than 200 feet from high water mark of surface water body.

(b)

OSS design and/or installation shall only occur where:

(1)

The slope is less than 30%;

(2)

The area of the proposed OSS and the replacement area is not subject to:

a.

Encroachment by buildings or construction such as placement of swimming pools, patios, stormwater drainage systems or facilities, interceptor drains, drainage courses, and/or underground utilities;

b.

Cover by impervious material;

c.

Vehicular or animal traffic; or

d.

Other activities adversely affecting the soil or OSS performance; and

(3)

Sufficient replacement area exists to treat and dispose 100% of the design flow meeting current standards.

(Ord. No. 1632, § 1, 3-28-2017)