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A. General.

1. The property owner is responsible for sewer system design.

2. The sewer system designer shall be a civil engineer licensed in the state of Washington and qualified by both experience and educational background in the design of sewer facilities.

3. Engineering and design shall conform to the engineering standards.

4. Sewer facilities in a designated coal mine area are subject to additional design requirements. See the coal mine area subdivision, development, and building permit regulations adopted by Resolution No. 5712.

B. Sewer Facility Requirements.

1. Whenever property is developed or redeveloped in any way such that sewage discharge is changed in content or volume, new sewer facilities shall be required whenever necessary to:

a. Meet hydraulic capacity requirements. See the engineering standards;

b. Replace or relocate existing facilities as required or authorized by the utility; or

c. Meet industrial waste pretreatment requirements pursuant to BCC 24.04.213.

2. Whenever property is developed or redeveloped, sewer mains shall be extended through and to the extremes of the property being developed, as required by the utility, when needed for the orderly extension of the public sewer system.

C. Side Sewer Design.

1. A maximum of four residential structures may be connected to a single side sewer.

2. Where physical conditions render compliance with utility side sewer requirements impracticable, the utility may require compliance insofar as is reasonably possible; provided, that the property owner execute and deliver to the utility an instrument, in a form furnished by the utility, agreeing to hold harmless and indemnify the utility and the city of Bellevue for any damage or injury resulting from such installation. The utility may require that such instrument be recorded against the property with the King County office of records and elections.

D. Pump Stations and Lifts.

1. Pump stations shall be permitted only for service to those properties which the director determines cannot reasonably be served by conventional gravity sewers.

2. In any structure in which the plumbing is too low to permit gravity flow to the designated connection point, the sewage shall be lifted by artificial means. When only the lower floor of a structure is too low for gravity flow, the sewage from the upper floors must flow by gravity. (Ord. 5964 § 1, 2010.)