§ 44-55-1330

See Editor's notes. (A) A passive soil-based on-site disposal system must be installed only by installation technicians who are licensed by the department under Regulation 61-56.1 as an installer and certified by the manufacturer or a representative that has been duly authorized to administer licensed installer certification. (B) A passive soil-based on-site disposal system must be sized and installed according to these minimum standards: (1) The storage capacity of the system must be at least that available in a conventional gravel system below the invert. A manufacturer shall provide its product's storage capacity as determined by a recognized third party testing company. (2) The total trench bottom area of the passive soil-based on-site disposal system, measured as the area bounded by the trench width and length must be at least seventy-five percent of that required for a conventional gravel system. The system must not be less than three hundred square feet, measured as the area bounded by the trench width and length, for soils in all classifications.

t required for a conventional gravel system. The system must not be less than three hundred square feet, measured as the area bounded by the trench width and length, for soils in all classifications. In addition to the above requirement, the system must provide an unobstructed open bottom area equal to at least one-half the total bottom area of a conventional gravel system. The system must have a projected product width that fills the trench width within two inches. The system also must have a reserve area at least equal to fifty percent of the size of the installed system. (3) The absorption area must comply with all other appropriate separation distances, trench location, trench depth, and contour orientation as prescribed in Regulation 61-56. The permitting procedure for these systems will be the same as conventional systems to include site evaluation and final inspection. (4) The entire absorption area must be shown on a set of 'as built' diagrams prepared by the department at the time of final inspection to include information identifying the name of the installer, the name of the product manufacturer, and the type or model number of the installed product.

e department at the time of final inspection to include information identifying the name of the installer, the name of the product manufacturer, and the type or model number of the installed product. (5) Lateral trench runs must be as long as practical within the limits of the approved site so as to minimize the linear loading rate. Wastewater may be distributed to a lateral trench run either by gravity flow or by pump. HISTORY: 2003 Act No. 49, Section 1, eff June 6, 2003; 2015 Act No. 37 (H.3646), Section 3, eff June 1, 2015.