HomeMy WebLinkAboutOWTS Installation Observations 09.12.2025CBO Inc.
129 Cains Lane
Carbondale, CO 81623
970.309.5259
carla.ostberg@gmail.com
September 12, 2025 Project No. C1804
Justin Sanford
justin@go-rentals.com
Onsite Wastewater Treatment System (OWTS) Installation Observations
Lot 12, Rapids on the Colorado
Garfield County, Colorado
Permit SEPT.8284
Justin,
CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on December 15,
2024 for the subject property. Alpine Land Clearing and Excavation installed the system.
The OWTS design is based on 4-bedrooms. An average daily wastewater flow of 525 GPD was used.
The 4-inch SDR-35 sewer line exiting the residence had a double-sweep clean out and a minimum 2%
grade to the septic tank.
The system installation included a 1500-gallon, two-compartment Norwesco poly septic tank with an
Orenco® Biotube effluent filter on the outlet tee. This filter should be cleaned annually, or as needed.
Effluent gravity flows to a distribution box, and then to two gravelless chamber beds. The distribution box
is accessible from grade and equalizers were installed on each outlet pipe in the distribution box to
assure equal flow to each bed.
A 4-inch diameter SDR-35 level manifold is installed to connect each row of the chamber beds. The
chamber beds consist of 3 rows of 9 ‘ADS’ ARC 36 chambers for a total of 54 chambers and 810 square
feet of infiltrative area. Inspection ports are installed at each corner of the beds. Ports are cut to grade
and placed in sprinkler boxes 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
Septic tank
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: TBD Rapids View Lane New Castle, CO Parcel No.: _218104307012
Owner Name: Justin Sanford Owner Phone: None given
Designed By: CBO Designer Phone: (970) 309-5259
Minimum Tank Capacity: 1,250-gallon Minimum Absorption: 735 ft2
OWTS PERMIT
KEEP AVAILABLE AT PROJECT SITE
Permit Number _SEPT-8284_______________________________
Permit Type X New X Repair X Remodel/addition X Tank only
Issue Date _09/19/2023____________________ Expiration Date_09/19/2024_________________
Permit Conditions:
This OWTS Permit is approved on the condition of compliance with the report and design as
submitted by CBO dated May 11, 2022. 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 a new 4-bedroom residence. The new OWTS components will consist of a
new, two-compartment 1,250-gallon septic tank set level with access to grade and an effluent filter
installed in the outlet tee of the tank. Effluent will gravity flow to the tank, then to a distribution box
set level with access to grade that will distribute effluent to 792 ft2 of STA. The new STA will consist
of two three-row gravelless chamber beds 9 ft wide by 45.6 ft long, each row consisting of 11
Infiltrator Quick4 chambers (66 chambers total). Inspection ports will be installed at each corner of
each bed. 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 BACKFILED
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.
09/19/2023
Issued By: Garfield County Environmental Health
Department
Date
832‐R‐13‐002