HomeMy WebLinkAbout1.09 Wastewater Management13. Wastewater Management and System Plan (pursuant to Section 4-203.N)
Introduction
Lot 1 will be served by an Onsite Wastewater Treatment System (OWTS). NRCS Soil Survey information
indicates that site soils may limit the use of a conventional OWTS so use of an alternative OWTS may be
necessary. A site-specific geotechnical evaluation will be required to determine the type of OWTS best
suited for Lot l's geologic conditions. A request for a waiver of the submission requirements of Section 4-
203.N is included in this application.
The residential property just to the east of the proposed lot (parcel # 218933300036) installed and
operates a conventional OWTS (septic tank and absorption trench, bed or pit). Refer to the Garfield
County Building and Sanitation Department Septic Permit (#2765) included in this application. NRCS Soil
Survey information indicates that the soils on the neighboring property (Torriorthents-Camborthids-Rock
outcrop complex (6-65 % slopes)) have many of the same characteristics as soils on Lot 1.
There is sufficient space for an OWTS to be installed and conform with the County's minimum distance
requirements, specifically the minimum distance required between a leaching area and well (100 feet).
Refer to the Site Plan included in this application.
Design and Construction
The size of Lot 1 offers several locations where a residence could be constructed. The lot owner(s) will be
responsible for identifying their preferred building site. The location of the residence will then be used to
identify an appropriate site for an OWTS.
Absent an identified building site, a geotechnical evaluation of the entire 10 -acre lot or a geotechnical
evaluation of potential building sites (which there are several) would be necessary to satisfy the
requirements of Section 4-203.N, as part of this application. That would be an unnecessary financial
burden for the applicant and would not be practical. Therefore, at the time of building permit, it will be
the lot owner(s) responsibility to obtain a geotechnical evaluation from a qualified professional, pursuant
to Section 4-203.A, specific to the areas where improvements are to be constructed. The geotechnical
evaluation will include subsurface investigation, soil percolation testing and any other studies required to
determine the maximum seasonal groundwater and depth to bedrock in compliance with the applicable
County and State OWTS regulations. The location of percolation testing sites shall be noted and identified
on a map included in the geotechnical evaluation report.
The lot owner(s) will be responsible for ensuring that the plans, specifications and construction of their
OWTS conforms to the County's OWTS requirements, the requirements of the Colorado Department of
Public Health and the Environment (CDPHE) Water Quality Control Commission and any
recommendations provided in the geotechnical evaluation. The OWTS will be designed by qualified
professional engineer licensed in the State of Colorado. Evidence of the OWTS's compliance with the
applicable County and State OWTS requirements will be submitted by the lot owner(s) at time of building
permit.
Operation and Maintenance
The EPA and Garfield County recommend that property owners conduct regular maintenance on their
OWTS according to the following schedules:
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Table 20. Recommended OWTS Maintenance
Maintenance Task
Frequency
(Garfield County)
Frequency
(EPA)
Inspection of OWTS
Once a year.
At least every 3 to 5 years.
Cleaning of OWTS
Cleaned as necessary, if inspected
once a year.
No recommendation provided.
Pumping of OWTS
Every 4 years, when a yearly
inspection by the owner is not
practical.
Every 3 to 5 years.
Inspection of alternative OWTS with electrical float
switches, pumps, or mechanical components.
No recommendation provided.
Generally once a year.
Without a site-specific OWTS design, it is not possible to include a proposed management plan for the
operation and maintenance of the OWTS in this application. Therefore, the lot owner(s) will be
responsible for developing a management plan specific to their OWTS and providing a copy of such plan
to the County as required. As appropriate, the recommendations of the EPA and Garfield County should
be used to inform the OWTS management plan for Lot 1.
14. Compliance with Article 7
Division 1. General Approval Standards
Zone District Use Regulations
Table 21 demonstrates that the proposed lot conforms with the County's standards for the Rural (R) zone
district, pursuant to Section 3-201.
Table 21. Conformance with Rural (R) Zone District Standards
Rural (R) Zone District Standards
Conformance with Rural (R) Zone District Standards
Minimum Lot Size
2 -acres
The proposed lot is 10 -acres in size.
Maximum Lot151/
Coverage
The lot owner(s) will be responsible for ensuring that lot
coverage does not exceed 15% (1.5 -acres).
Front Setback
50 feet (arterial)
25 feet (local)
There is sufficient buildable area on the 10 -acre lot to
accommodate the required front setback. Refer to the Site Plan
included in this application.
Rear Setback
25 feet
There is sufficient buildable area on the 10 -acre lot to
accommodate the required rear setback. Refer to the Site Plan
included in this application.
Side Setback
10 feet or 1/2 the
building height,
whichever is greater
There is sufficient buildable area on the 10 -acre lot to
accommodate the required side setbacks. Refer to the Site Plan
included in this application.
Height
R: 25 feet
NR: 40 feet
The lot owner(s) will be responsible for ensuring that any
improvements constructed on the lot conform to the County's
height regulations.
Pursuant to Section 3-202.A, the proposed lot has a minimum of 25 lineal feet of frontage on road right-
of-way providing access. Section 3-202.B, 3-202.C, 3-202.D and 3-202.E are not applicable to this
application. The lot owner(s) will be responsible for ensuring that any projections into required yards of
the Rural (R) zone district conform to the requirements of Section 3-202.F.
Lot 1 is to be developed with a single dwelling unit. Pursuant to Section 3-403, a "Dwelling, Single -Unit" is
permitted by right in the Rural (R) zone district. The lot owner(s) will be responsible for ensuring that any
other land uses on Lot 1 conform to the applicable County requirements.
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