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RULE §285.4Facility Planning

(a) Land planning and site evaluation. Property that will use an on-site sewage facility (OSSF) for sewage disposal shall be evaluated for overall site suitability. For property located on the Edwards Aquifer recharge zone, see §285.40 of this title (relating to OSSFs on the Recharge Zone of the Edwards Aquifer) for additional requirements. The following requirements apply to all sites where an OSSF may be located.

  (1) Residential lot sizing.

    (A) Platted or unplatted subdivisions served by a public water system. Subdivisions of single family dwellings platted or created after the effective date of this section, served by a public water supply and using individual OSSFs for sewage disposal, shall have lots of at least 1/2 acre.

    (B) Platted or unplatted subdivisions not served by a public water system. Subdivisions of single family dwellings platted or created after the effective date of this section, not served by a public water supply and using individual OSSFs, shall have lots of at least one acre.

    (C) A platted or unplatted subdivision where one tract is divided into four or fewer parts; where each tract is five acres or larger; and each tract is to be sold, given, or otherwise transferred to an individual who is related to the owner within the third degree by consanguinity or affinity, as determined under Texas Government Code, Chapter 573 is exempt from submitting planning materials required in this section.

  (2) Manufactured housing communities or multi-unit residential developments. The owners of manufactured housing communities or multi-unit residential developments that are served by an OSSF and rent or lease space shall submit a sewage disposal plan to the permitting authority for approval. The total anticipated sewage flow for the individual tract of land shall not exceed 5,000 gallons per day. The plan shall be prepared by a professional engineer or professional sanitarian. This plan is in addition to the requirements of subsection (c) of this section.

(b) Approval of OSSF systems on existing small lots or tracts.

  (1) Existing small lots or tracts that do not meet the minimum lot size requirements under subsection (a)(1)(A) or (B) of this section, and were either subdivided before January 1, 1988, or had a site-specific sewage disposal plan approved between January 1, 1988, and the effective date of this section, are allowed to use OSSFs, but the OSSFs must comply with the requirements set forth in this Chapter.

  (2) The owner of a single family dwelling on an existing small lot or tract (property 1) may transport the wastewater from the dwelling to an OSSF at another location (property 2) provided that:

    (A) both properties (properties 1 and 2) are owned by the same person;

    (B) the owner or owner's agent demonstrates that no OSSF authorized under these rules can be installed on the property which contains the single-family dwelling (property 1);

    (C) if property not owned by the owner of properties 1 and 2 must be crossed in transporting the sewage, the application includes all right-of-ways and permanent easements needed for the sewage conveyance lines; and

    (D) the application includes an affidavit indicating that the owner or the owner's agent recorded the information required by §285.3(b)(3) of this title (relating to General Requirements) on the real property deeds of both properties (properties 1 and 2). The deed recording shall state that the properties cannot be sold separately.

(c) Review of subdivision or development plans. Persons proposing residential subdivisions, manufactured housing communities, multi-unit residential developments, business parks, or other similar structures that use OSSFs for sewage disposal shall submit planning materials for these developments to the permitting authority and receive approval prior to submitting an OSSF application.

  (1) The planning materials must be prepared by a professional engineer or professional sanitarian and must include:

    (A) an overall site plan;

    (B) a topographic map;

    (C) a 100-year floodplain map;

    (D) a soil survey;

    (E) the locations of water wells;

    (F) the locations of easements, as identified in §285.91(10) of this title (relating to Tables);

    (G) a comprehensive drainage plan;

    (H) a complete report detailing the types of OSSFs to be considered and their compatibility with area-wide drainage and groundwater; and

    (I) other requirements, including Edwards Aquifer requirements that are pertinent to the proposed OSSF.

  (2) If the proposed development includes restaurants or buildings with food service establishments, the planning materials must show adequate land area for doubling the land needed for the treatment units. The designer may consider increasing the amount of land area for the treatment units beyond doubling the minimum required area.

  (3) The permitting authority will either approve or deny the planning materials, in writing, within 45 days of receipt.

Source Note: The provisions of this §285.4 adopted to be effective February 5, 1997, 22 TexReg 1114; amended to be effective June 13, 2001, 26 TexReg 4115; amended to be effective September 11, 2008, 33 TexReg 7536; amended to be effective December 27, 2012, 37 TexReg 9947

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