|
Contact 425-556-2840 for additional details pertaining to forms,
fees, or administrative requirements for developer utility system
extensions.
From
time to time, special appurtenances will be required for various
development projects including, but not limited to grease
interceptors,
oil water separators, backflow preventors and grinder pumps. Find more
specific information below.
Reimbursement
Agreement
Portions of a system extension may benefit other properties and meet the
criteria to be eligible for a reimbursement agreement. In order to be
eligible for reimbursement, the City must have received a completed
reimbursement agreement application prior to approval of construction
drawings and the agreement must be fully executed by the City prior to
commencement of construction of the facility. All reimbursement fees
must be paid prior to sale of water and side sewer permits and may be required prior to plat or short plat recording.
SEPA Mitigations
SEWER SYSTEM STUDY
As part of or in preparation for environmental documents for the
project, an engineering report/sewer plan shall be prepared in
accordance with Chapter 173-240 WAC. This report shall describe the
sewer trunks and collectors needed to serve the project and other
tributary areas. The engineering document will need to be adopted by
the City as part of its Utility Master Planning, either by
Development Guide Amendment or Technical Committee approval, as
appropriate. The engineering document will need to be reviewed and
approved by the applicable State and local agencies.
WATER SYSTEM STUDY
As part of or in preparation for environmental documents for the
project, a water system plan/project report shall be prepared in
accordance with Chapter 248-54 WAC. This report shall describe water
transmission/distribution mains and appurtenances needed to serve
the project and other proximate areas. The engineering document will
need to be adopted by the City as part of its Utility Master
Planning either by Development Guide Amendment or Technical
Committee approval, as appropriate. The engineering document will
need to be reviewed and approved by the applicable State and local
agencies.
Fees
Plan review and construction inspection fees are required and will be at
the rate in effect when plans are approved. Connection fees are at the
rate in effect when water meter and side sewer permits are issued. All reimbursement fees shall be paid prior
to sale of water and side sewer permits. Reimbursement fees may be
required prior to plat or short plat recording. Contact the Development
Services of the Public Works Department to
obtain an estimate of the fees that will apply.
Pretreatment
OIL/WATER SEPARATORS
Oil/water separators treat oily wastewater before the water is
discharged to the sanitary sewer. Oil water separators are required for underground parking
structures, gas stations, and for all facilities where there is
potential for discharge of oily contaminated waters. In addition, no
grease, oil, sand, liquid waste containing grease or flammable
material or other harmful ingredients in excessive amount shall be
discharged into any public sewer without installation of a
pretreatment process. The design shall follow criteria established
by the City and King County Wastewater Treatment
Division. For
permitting questions and other information please call 425-556-2840.
GREASE INTERCEPTORS
To ensure the proper disposal of animal fats and vegetable oils, and
to prevent sewage back-ups, the City requires grease-generating
establishments to correctly install, operate and maintain properly
sized and designed grease interceptors. Grease interceptors shall be required for all commercial buildings
with kitchen and/or cafeteria facilities. The sizing of the
interceptor shall be in accordance with Appendix "H" of
the latest edition of the Uniform Plumbing Code recognized by the
City. Approval of the interceptor sizing by the Development Services is required prior to installation. Inspection of the grease
interceptor shall be the responsibility of the Construction and/or
Building Divisions. For permitting questions, sizing criteria, or
other information please call 425-556-2840.
Backflow
Preventors
Locations and size of backflow preventors must be shown on the
construction drawings. Backflow preventors are to be installed in
accordance with the latest editions of the American Water Works Association
(AWWA) Cross Connection Control Manual and the Uniform Plumbing code
(UPC).
If the backflow preventor is to be installed within a vault located on
the exterior of the building, a detailed design must be included with
the construction drawings delineating the vault layout, piping
configuration, gravity drain and appurtenances.
Grinder
Pumps
Grinder pump applications are restricted to single-family and
single commercial buildings that are physically unable to connect to the
sanitary sewer system by gravity. For
all applications, each grinder pump shall have its own individual force
main. For further
information on Grinder Pumps please contact the Development Services at 425-556-2840.
|
