Article V. - Construction of Sanitary Sewer Systems


13.18.140 - Design criteria and construction standards.

The department shall ensure that sewer facilities design and construction standards satisfy the standards of the most current department design and construction specifications, or as prescribed and interpreted by the director.

(Ord. 132-94 § 5.01, 1994).

13.18.150 - Connection to public sewers.

All connections to the public sewers of the county shall be made in a permanent and sanitary manner in accordance to the provisions of this chapter and shall be sufficient to carry all the wastewater of every kind from the building or structure into the public sewer.

(Ord. 132-94 § 5.02, 1994).

13.18.160 - Repairs to connections.

For assessed properties within Hartstene Pointe, any needed repair to a building sewer or connection to a public sewer shall be made within thirty days after the date of mailing or personal service of a notice by the director to the owner of the property served notifying such owner to make such repair. In the event of an emergency, the director may establish a shorter period of time for the repair to be made or, if the owner cannot be located or does not promptly make such repairs, the county may make the repairs under the procedures of this chapter and charge for the work based on the staff's hourly rate.

(Ord. 132-94 § 5.03, 1994).

13.18.170 - Connection standards.

(a)

Old building sewers may be used in connection with new buildings, or new building sewers only when they are found to meet all the requirements of this chapter.

(b)

The building sewer shall conform to all county and state building codes and/or with the manufacturer's recommended practices, whichever is more restrictive. Sewer pipe and fittings at a minimum shall be PVC and shall meet or exceed ASTM recommended specifications D3034-73, SDR 35, current revisions.

(c)

Connections between dissimilar pipe materials shall be by adaptors approved by the director or his agent. The first fitting at the connection of the building sewer to the public sewer service connection shall be a tee, furnished by the owner. Immediately after installation of the tee, an expandable watertight plug shall be installed in the tee branch connected to the public sewer. Said plug shall remain in place during construction and testing of the building sewer. After the plug has been removed, the tee riser shall be extended vertically to within six inches to eighteen inches of finished ground surface and shall be sealed with an approved cap or plug. The riser shall be used as an auxiliary cleanout.

(d)

The size and slope of the building sewer shall be subject to the approval of the director, but in no event shall the diameter be less than four inches. The slope of said four-inch pipe shall not be less than one-quarter inch per foot, unless approved by the director. In no case shall the slope of four-inch pipe be less than one-eighth inch per foot. A minimum of eighteen inches of cover shall be maintained over the top of service pipe at all times.

The building sewer shall be laid at uniform grade and in a straight alignment insofar as is possible. Changes in direction shall be made only with curved pipe no greater than forty-five-degree bends. All pipe shall be laid on a four-inch granular base of a three-fourths-minus rock, pea gravel, sand or combination thereof.

Whenever possible, the building sewer shall be brought to the building at an elevation below the basement floor. In all buildings in which any building drain is too low to permit gravity flow to public sewer, sanitary sewage carried by such building drain shall be lifted by an approved means and discharged to the building sewer.

(e)

All excavation required for the installation of a building sewer shall be open trench work unless otherwise approved by the director. No backfilling of the trench shall be done until inspection by the county has been conducted.

(f)

All joints and connections shall be made gastight and watertight.

(g)

The applicant for building permit shall notify the director when the building sewer is ready for inspection and connection to the public sewer. After final approval and testing of the building sewer by the director, the owner shall make the final connection to the building drain, unless otherwise authorized by the director. A thirty-minute internal hydrostatic test may be required on all building sewers before connection is made to the building drain. All water plugs and other facilities for making the test shall be furnished by the applicant. Minimum head over the top of the pipe shall be two feet and a maximum allowable leakage shall be four gallons per hour per one hundred feet.

(h)

Any structure having a plumbing outlet that serves fixtures with flood level rims located below the elevation of the next upstream manhole cover shall install an approved backwater valve.

(Ord. 132-94 § 5.04, 1994).

13.18.180 - Information from the county.

The owner of any building shall be responsible for obtaining from the director the approximate location and elevation of the sewer wye, tee or stub at the point of connection and, in the case of new construction, for planning the building and plumbing to provide adequate slope for building connection to the side sewer stub. The applicant for permit shall be responsible for determining the available grade between plumbing outlet and sewer wye, tee or stub. All department-supplied information shall be field-checked by the owner/developer or his/her representative prior to design and/or commencing construction. The county is not liable for inaccurate information provided to the county.

(Ord. 132-94 § 5.05, 1994).

13.18.190 - Costs of building sewer or sewer-line extension borne by owner.

All costs and expense incidental to the installation, connection, maintenance, cleaning, repair and/or addition to or of the building sewer shall be borne by the owner. This responsibility includes paying all costs incidental to the aforementioned activities performed on all segments of the sewer and including but not limited to side sewer stub, sewer tee, sewer wye and all other sewer appurtenances.

(Ord. 132-94 § 5.10, 1994).

13.18.200 - Reuse of old building sewers.

Old building sewers may be used only when they are found, on examination and test by the director to meet all requirements of this chapter. This examination and test shall be at the owner's expense. The owner or his/her agent shall demonstrate to the director that no connection to such building sewer line exists which conveys any material prohibited by county.

(Ord. 132-94 § 5.11, 1994).

13.18.210 - Protection of excavations and restoration of public property.

All excavations for building sewer or sewer-line extension installations shall be adequately guarded with barricades and lights in accordance with state and county requirements so as to protect the public from hazard. Roads, parkways and other public property disturbed in the course of the work shall be restored to original condition or better.

(Ord. 132-94 § 5.12, 1994).