Napa County Municipal Code Ch. 13.40 Types of Disposal Systems

The type of sewage disposal system shall be determined on the basis of use, location, soil porosity and groundwater level, and shall be designed to receive all sanitary sewage generated on the premises.

(Ord. 1109 § 1 (part), 1996: prior code § 5560)

A. Where private and public sewage disposal systems are not available and where conditions are such that an individual conventional sewage disposal system cannot be expected to function satisfactorily, as where the soil is heavy tight clay, hardpan, rock or other impervious formations, an alternative sewage treatment system may be permitted. All alternative sewage treatment systems must comply with the requirements of department of planning, building and environmental services as set forth in that document entitled, "Design, Construction, and Installation of Alternative Sewage Treatment Systems."

B. Proposed alternative sewage treatment systems shall be accompanied by complete design criteria based upon local conditions, and shall be subject to the approval of the administrative authority.

C. All alternative sewage treatment systems are required to be installed by a properly licensed contractor possessing a C-42, C-36, or General A Engineering license.

D. All alternative sewage treatment systems approved after January 1, 2000 are required to have an annual operating permit issued by the administrative authority. In addition, all alternative sewage treatment systems approved after July 1, 2006 are required to have necessary inspection and maintenance services provided by an approved service provider.

(Ord. No. 1337, § 22, 5-5-2010; Ord. 1109 § 1 (part), 1996: prior code § 5561)

(Ord. No. 1374, § 31, 9-11-2012)

Sewage disposal systems for minor, limited or temporary uses shall be subject to the approval of the administrative authority. Onsite wastewater systems that do not comply with the requirements of this code, but have demonstrated adequate performance in the California or National Parks Systems, may be approved at government controlled parks, preserve areas, and other similar remote areas at the discretion of the administrative authority. A qualified professional must design such systems.

(Ord. No. 1337, § 22, 5-5-2010; Ord. 1109 § 1 (part), 1996: prior code § 5562)

The administrative authority shall require that all private and individual sewage disposal systems be so designed that additional expansion area of adequate size for repair of the sewage disposal system remains available and unencumbered. The amount of area to be designated, based on soil type and waste water flows, shall be determined by the administrative authority and shall be specifically defined stated in the permit.

(Ord. 1109 § 1 (part), 1996: prior code § 5563)

Where, in the opinion of the administrative authority, there is insufficient lot area or improper soil conditions for adequate sewage disposal for the building or land use proposed, no permit shall be issued until engineering data, test reports and design satisfactory to the administrative authority have been submitted and approved.

(Ord. 1109 § 1 (part), 1996: prior code § 5564)

Whenever application is made to permit construction of privately owned, controlled, and/or maintained sewage collection, treatment and/or disposal facilities, the administrative authority may require the posting of a surety bond to guarantee the construction of the proposed sewage facilities.

(Ord. 1109 § 1 (part), 1996: prior code § 5565)