(A) General. When an onsite wastewater treatment system has atypical wastewater flow as described in this section, the Health Officer may require a system design, construction plan, construction procedure, inspection schedule and method, system materials, or other agreements and conditions in addition to the requirements of §§ 171.066 through 171.069.
(1) Description of atypical wastewater flow. The following conditions describe and define atypical wastewater flow and render the onsite wastewater treatment system subject to the requirements of the entirety of this section:
(a) Projected wastewater flow. The projected wastewater flow exceeds 1,500 gpd;
(b) Shared systems. Any part of the proposed onsite wastewater treatment system is shared by two or more dwellings or non-residential buildings, including community systems or clustered systems;
(c) Collection system. The wastewater collection system is of low pressure sewer design with septic tank effluent pump units (STEP tanks) or grinder pump units;
(d) High strength wastewater. The wastewater influent quality is projected to exceed 300 mg/l BOD5;
(e) Wastewater reuse or recycling. Any portion of the treated wastewater is proposed for reuse or recycling.
(B) Pre-proposal review and determination of additional requirements. When an applicant proposes to construct a new or replacement onsite wastewater treatment system, or repair an onsite wastewater treatment system that has atypical wastewater flow as described in this section, the Health Officer shall require a pre-review of the proposal to determine and establish additional requirements, if any, appropriate to the proposal. The review shall consider the elements of the proposal that may stress the onsite wastewater treatment system, such as waste strength (BOD, solids, greases and oils, etc.), peak flows, seasonal flow variations, soil or site limitations, and elements of the proposal that may require special arrangements for access or maintenance, such as shared ownership.
(1) Pre-proposal review meeting. As part of the pre-review, the Health Officer shall require a meeting with the applicant and/or individuals involved with the design of the system and project. Any additional requirements imposed by the Health Officer shall be established in this meeting, and shall be agreed to by the Health Officer and the applicant and/or individuals involved with the design of the system and project prior to the Health Officer approving the proposal.
(Ord. [Bd of Health Ord., Art. V], passed 11-12-1996; Ord. [Bd of Health Ord., Art. V], passed 11-12-2013)