Section R317-401-4 - Feasibility Determination and Design Requirements4.1. General Criteria for Determining Graywater System Feasibility. The regulatory authority shall determine the feasibility of using a graywater system. The regulatory authority shall review required information for any existing or proposed system to determine graywater system feasibility. The required information shall be prepared at the owner's expense by, or under the supervision of, a qualified person approved by the regulatory authority. Required information shall include:
(a) name and address of the property owner and person requesting feasibility;(b) the county recorder's plat and parcel ID and situs address if available;(c) the location and distance to the nearest sewer, owner of sewer, whether property is located within the sewer service boundary, and size of sewer; and(d) a statement of proposed use if other than a single-family dwelling.4.2. Soil and Site Evaluation. Soil and groundwater evaluations shall be conducted by professionals fulfilling the requirements of Rule R317-11.
(a) Soil classification and maximum ground water determination shall be: (i) performed using a minimum of one test hole;(ii) dug in close proximity to the proposed subsurface distribution zone;(iii) be at least two feet below the bottom of the proposed subsurface distribution zone; and(iv) evaluated and reported using the USDA Soil Texture Classification method.(b) Soil sample test results may also be accepted from a qualified soil analysis lab at the discretion of the local health department.4.3. Plan Review and Permitting. Plans and specifications for the construction, alteration, extension, or change of use for any graywater system shall be submitted to the regulatory authority. The regulatory authority shall review said plans and specifications as to their adequacy of design for the intended purpose, and shall, if necessary, require such changes as are required by these rules. When the reviewing regulatory authority is satisfied that plans and specifications are adequate for the conditions under which a system is to be installed and used, a construction permit shall be issued to the property owner. Construction of any graywater system may not commence until the regulatory authority has issued a construction permit.
(a) System Designer Qualifications. Graywater system design requirements are determined by the complexity of the system. Systems shall be permitted by tiers.
(i) a Tier 1 System designer shall be certified at a Level 2 as defined by R317-11.(ii) a Tier 2 System designer shall be certified at a Level 3 as defined by R317-11.(b) Information Required. Plans submitted for review shall be drawn to scale, 1" = 10', 20' or 30', or other scale as approved by the regulatory authority. Plans shall be prepared in such a manner that the contractor can read and follow them in order to install the system properly. Depending on the individual site and circumstances, or as determined by the regulatory authority, required information may include:
(i) applicant information consisting of:(A) the name, current address, and telephone number of the applicant;(B) complete address, legal description of the property, or both to be served by the graywater system.(ii) a graywater irrigation system site plan consisting of:(A) submittal date of plan;(C) lot size and dimensions;(D) ground surface contours, preferably at 2 foot intervals, of both the original and proposed final grades of the property, or relative elevations using an established bench mark;(E) maximum number of bedrooms, including statement of whether a finished or unfinished basement will be provided, the number of fixtures proposed to be connected to graywater system, or if other than a single family dwelling, the number of occupants expected and the estimated gallons of wastewater generated per day;(F) location and dimensions of paved and unpaved driveways, roadways and parking areas;(G) proposed location and dimensions of the essential components of the graywater system;(H) location of all soil exploration pits and all percolation test holes;(I) location of any present or proposed retaining walls, drainage channels, or buildings;(J) location of building sewer and water service line to serve the building;(K) location of easements or drainage right-of-ways affecting the property;(L) location of all intermittent or year-round streams, ditches, watercourses, ponds, subsurface drains, etc. within 100 feet of proposed graywater system;(M) location, type, and depth of all existing and proposed non-public water supply sources within 200 feet of the graywater system, and of all existing or proposed public water supply sources within 1500 feet of the graywater system and associated source protection zones;(N) distance to nearest public water main and size of main; (O) distance to nearest public sewer, size of sewer, and whether accessible by gravity;(P) location of any onsite wastewater system, any replacement area, and location of the proposed graywater system;(iii) a statement with the site plan indicating the source of culinary water supply, whether a well, spring, non-public or public system, and its location and distance from any graywater systems within 200 feet. The regulatory authority may not approve a graywater irrigation system if: (A) the applicant has a private culinary system; and(B) lacks a water right with use type designated for irrigation by the Utah Division of Water Rights.(iv) relative elevations, using an established bench mark, including: (A) building drain outlet;(B) the outlet of any graywater system components;(C) the final ground surface over the graywater system. (v) Details for the graywater system design site, plans, and specifications as listed in Section R317-401-5, including: (A) schedule or grade, material, diameter, and minimum slope of graywater sewer and distribution pipes;(B) surge tank capacity, design, cross sections, etc., materials, and dimensions, if applicable. If tank is commercially manufactured, the name and address of manufacturer shall be provided;(C) subsurface graywater discharge system details, including:(1) details of mulch shields and mulch shield basins, if provided;(2) description and details for method of graywater dispersal, whether aggregate or chambers;(3) length, slope, and spacing of each absorption system component;(4) maximum slope across ground surface of absorption system area;(5) distance of graywater discharge system from trees, cut banks, fills, or subsurface drains;(6) cross section of graywater discharge system showing the:(I) depth and width of graywater discharge system excavation;(II) depth of distribution pipe;(III) depth of aggregate;(IV) barrier material, i.e. synthetic filter fabric, straw, etc., used to separate aggregate from cover; and(7) other pertinent information. 4.4. Plans Submitted. (a) All applicants requesting plan approval for a graywater system shall submit a sufficient number of copies of required information to enable the regulatory authority to retain one copy as a permanent record.(b) Applications may be rejected if proper information is not submitted.Utah Admin. Code R317-401-4
Amended by Utah State Bulletin Number 2020-08, effective 3/26/2020