§ 4.84.115. OWTS; minimum requirements.

a.

Where an OWTS is required, it shall, at a minimum, consist of a conventional OWTS as defined in this chapter. The septic tank and subsurface effluent dispersal system must be designed by a qualified OWTS design professional, permitted, and so constructed as to meet the requirements of this chapter and the rules, regulations and guidelines prescribed in the Onsite Systems Manual.

b.

No person may construct, add to, repair or alter any new or existing OWTS without first submitting plans to Environmental Health for approval and obtaining a permit pursuant to the requirements of this chapter and the Onsite Systems Manual.

c.

A primary dispersal field must be installed, consisting of two sets of effluent dispersal trenches interconnected with an approved flow diversion device (dual dispersal system), intended to allow alternate use of the two fields as prescribed in the Onsite Systems Manual. Additional dispersal fields equivalent to and separate from the primary dual dispersal fields, must be identified and such area held in reserve for potential future replacement of the primary field(s).

d.

For all locations where an OWTS is proposed to be installed or expanded, including designated replacement fields, soil percolation testing and other exploratory tests, as necessary, shall be performed to verify adequate depth and permeability of soil and separation between trench bottom and groundwater. Testing shall be conducted in accordance with requirements and guidelines prescribed in the Onsite Systems Manual. Such procedures shall include provisions for completion of Groundwater observations during the wet season, as well as wet season soil percolation testing in cases where soils exhibit high shrink-swell characteristics related to clay content, plasticity and/or structure.

e.

Soil percolation testing, groundwater determinations, and designation of adequate dispersal system area to meet the requirements of this chapter for divisions of land will be required on each proposed parcel.

(Ord. No. 04754, § 1, 1-5-2016)