HomeMy WebLinkAboutInstallation Observation 06.27.24CBO Inc.
129 Cains Lane
Carbondale, CO 81623
970.309.5259
carla.ostberg@gmail.com
June 27, 2024 Project No. C1871
Rue Balcomb
rue@ranchland.com
Onsite Wastewater Treatment System (OWTS) Installation Observations
401 CR 137
Garfield County, Colorado
OWTS Permit SEPT-8626
Rue,
CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on May 9, 2024 for
the subject property. Miles Rippy Excavating installed the system.
The OWTS design is based on 3-bedrooms in the residence and 1-bedroom in a future Accessory
Dwelling Unit (ADU). An average daily wastewater flow of 600 GPD was used.
The existing sewer line from the residence and existing 1250-gallon, two-compartment Copeland
concrete septic tank remained in use. An additional 1-foot of risers were added to the existing risers to
bring the septic tank lids to grade for future access and maintenance.
The system installation included a 500-gallon, single-compartment Infiltrator® poly pump chamber with
an Orenco® Biotube Pump Vault and an Orenco® PF3005 pump. There is a filter in this chamber. This
filter must be cleaned annually, or as needed. The floats were set to dose approximately 65 gallons
each pump cycle. The control panel for the pump is located within line of sight of the septic tank. We
tested the pump and alarm at the time of our site visit and everything was working properly.
Effluent will be pumped through a 1.5-inch diameter pump line from the pump chamber to an Orenco®
automatic distributing valve (ADV), model 6404. This pump line had a minimum 1% grade for proper drain
back into the tank after each pump cycle. The ADV was placed at a high point in the system in an insulated
riser with access from grade.
Effluent is pressure dosed through 1.5-inch diameter pipes to four gravelless chamber trenches, each
with 12 ‘Quick 4’ Plus Standard Infiltrator® chambers for a total of 48 chambers and 576 square feet of
infiltrative area. There was at least 4-feet of undisturbed soil between each trench.
Effluent is pressure dosed to 1.5-inch diameter laterals, which were hung with zip ties from the underside
of the chambers. Laterals have 5/32-inch diameter orifices facing up, with the exception of the first and
last orifices facing down for drainage. The orifices were placed 3-feet on center. Each lateral ends in a
90 degree ell facing up with a ball valve for flushing. Valves may be placed in a valve box, accessible
from grade, for access. Inspection ports were placed at the beginning and end of each trench. Ports
may be cut to grade and covered with a valve box for access.
The OWTS was generally installed according to specifications. This observation is not a guarantee of
workmanship and/or parts and materials. CBO Inc. should be notified if changes are made to the OWTS
in the future. Any additional OWTS construction must be according to the county regulations.
LIMITS: Observations are limited to components that are visible at the time of the inspection. The installer must
have documented and demonstrated knowledge of the requirements and regulations of the county in
which they are working. The quality of the installation is dependent on the expertise of the installer, soil
type, and weather conditions.
Please call with questions.
Sincerely,
CBO Inc.
Carla Ostberg, MPH, REHS
STA
Pump chamber to STA Control panel
Inside control panel Pump line (encased where crosses water line)
Inlet tee Outlet tee
Pump chamber Pump line
Pump chamber
ADV lid Inspection ports
Pump chamber installation / connecting to existing septic tank
Chamber trenches (pressurized laterals and inspection ports)
Distribution lines to trenches
ADV Flushing valves and inspection ports
Electrical line to pump
Trenches View of ADV and distribution lines
Trenches pump line to ADV
Pump chamber
Garfield County Public Health
2014 Blake Ave.
Glenwood Springs, CO 81601
Phone: (970) 945‐6614 ext. 8150
For inspections, call: 970‐945‐6614 ext. 8150 and call the Design Engineer, if applicable
Project Address: 401 County Road 137 Glenwood Springs, CO 81601
Parcel No.: _212325300004
Owner Name: Rue Balcomb Owner Phone: (970) 618‐0740
Designed By: CBO, Inc /K‐Cronk Engineering Designer Phone: (970) 309‐5259
Number of Bedrooms: _4_ Minimum Tank Capacity: 1,250‐gallon Minimum Absorption: 560 ft2
OWTS PERMIT
KEEP AVAILABLE AT PROJECT SITE
Permit Number _SEPT‐8626_______________________________
Permit Type X New X Repair X Remodel/addition X Tank only
Issue Date _04/26/2024____________________ Expiration Date_04/26/2025_________________
Permit Conditions:
This OWTS Permit is approved on the condition of compliance with the report and design as
submitted by CBO, Inc. and K‐Cronk Engineering dated April 1, 2024. Changes to the design and
permit must be approved by Garfield County Public Health and the designer prior to construction.
The new OWTS will serve an existing three‐bedroom residence and future 1‐ bedroom ADU and will
replace the existing OWTS on the property. The system will consist of the existing two‐compartment
1,250‐gallon septic tank at the residence and a new, single‐compartment 500‐gallon pump chamber
set level with access at grade with a high‐head pump in the pump chamber. Effluent will be pumped
to an Automatic Distributing Valve (ADV) set level with access at grade that will distribute effluent to
576 ft2 of STA. The new STA will consist of four gravelless chamber trenches, each trench consisting
of 12 Quick4 chambers per trench (48 Quick4 chambers total). Distribution laterals are to be 1 ½ inch
Schedule 40 PVC, with 5/32‐inch orifices 3‐feet on center and the laterals ending in 90‐degree bends
and flushing valves at the distal end of the laterals. Laterals are to be hung from the underside of the
chambers with zip‐ties. The orifices are to be facing upward except for the first and last orifices.
Inspection ports are to be installed at each end of each trench. Maintain all setbacks and elevations
as designed.
Contact the designer and Garfield County Public Health at least 48 hours prior to requesting final
inspection of the installed system prior to backfill. NO OWTS COMPONENT SHALL BE BACKFILLED
WITHOUT PRIOR APPROVAL FROM GARFIELD COUNTY PUBLIC HEALTH AND THE DESIGNER.
Agreement
All installations must comply with all requirements of the Garfield County OWTS regulations
including but not limited to the conditions specified above.
In consideration of the issuance of the permit, the applicant hereby agrees to comply with all
laws and regulations related to the zoning, location, construction, and erection of the proposed
OWTS and associated structures for which this permit is granted. The applicant further agrees
that if the above said regulations are not fully complied with in the zoning, location, erection,
and construction of the above described OWTS and structure, the permit may then be revoked
by notice from the Health Department and immediately become null and void.
The issuance of a permit and specifications of terms and conditions therein will not constitute
assumption of liability, nor create presumption that the local public health agency or its
employees may be liable for the failure or malfunctioning of any system. Permit issuance will
not constitute a certification that the system, the equipment used in the system, or any
component used for system operation will ensure continuous compliance with the provision of
the OWTS Act, the regulations adopted thereunder, or any terms and conditions of a permit.
Permit Approval
Plans and specifications for the proposed OWTS have been reviewed and are considered
satisfactory. Permission is hereby given to the property owner(s) to perform the work indicated
in accordance with the Garfield County OWTS Regulation. This Permit will expire 1 year from
the date of issuance unless construction on the system has commenced. An "as‐built" drawing
must be submitted and inspection of the system must be completed by GCPH before final
approval of the system will be issued.
04/26/2024
Issued By: Garfield County Environmental Health
Department
Date
832‐R‐13‐002