HomeMy WebLinkAboutInstallation Observation Letter 02.18.2024CBO Inc.
129 Cains Lane
Carbondale, CO 81623
970.309.5259
carla.ostberg@gmail.com
February 18, 2024 Project No. C1801
Edmundo Castillo
mund74@gmail.com
Onsite Wastewater Treatment System (OWTS) Installation Observations
1863 Lazy K
Garfield County, Colorado
OWTS Permit SEPT-8263
Edmundo,
CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on October 24,
2023 for the subject property. You, the property owner, installed the system.
The property is currently developed with a Cabin (284.2 square feet). A new, 4-bedroom is proposed to
the south of the existing road. There are plans to add a toilet and sink to the Cabin. The OWTS design
is based on 4-bedrooms. An average daily wastewater flow of 525 GPD was used.
The structures will be served potable water from a private well located just west of the Cabin. The well is
located greater than 50-feet from the proposed septic tank and greater than 100-feet from the proposed
soil treatment area (STA).
Only the 4-inch SDR-35 sewer line exiting the Cabin was installed at the time of our inspection. The
sewer line has a double-sweep clean out and a minimum 2% grade to the septic tank. When the main
house is constructed, a sewer line will be installed. At that time, there must be a clean out a minimum of
every 100-feet of sewer line. A wye fitting should tie the Main Residence sewer line into the sewer line
from the Cabin prior to entering the septic tank. A minimum Schedule 40 sewer line or conduit must be
installed under the driveway.
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 must be cleaned annually, or as needed.
Risers bring the manhole lids to grade for access.
Effluent gravity flows to a distribution box, and then to five gravelless chamber trenches. The distribution
box was accessible from grade with flow equalizers, or similar product, installed on each outlet pipe in the
distribution box to assure equal flow to each trench.
Each trench consists of 15 ‘ADS’ ARC 36 chambers for a total of 75 chambers and 1125 square feet of
infiltrative area. There was at least 4-feet of undisturbed soil between each trench. Inspection ports
were installed at the beginning and end of each trench. Ports may be 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
Distribution box piping to trenches
View of trenches View of septic tank and distribution box
Trenches Effluent filter
Handle extension Filter prior to installing handle extension
Sewer line with fall
Clean outs
Sewer line from cabin
“wye” fitting for future connection to main house
Sewer line from cabin Dbox
Norwesco poly tank
Sewer line from tank to distribution box
Distribution box Trenches and inspection ports
SDR35 sewer line Trenches
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: 1863 Lazy K Rd New Castle, CO Parcel No.: _217710100208
Owner Name: Edmundo Castillo Owner Phone: (970) 309-3884
Designed By: CBO Designer Phone: (970) 309-5259
Number of Bedrooms: 4 Minimum Tank Capacity: 1,500-gallon Minimum Absorption: 1,050 ft 2
OWTS PERMIT
KEEP AVAILABLE AT PROJECT SITE
Permit Number _SEPT-8263_______________________________
Permit Type X New X Repair X Remodel/addition X Tank only
Issue Date _08/31/2023____________________ Expiration Date_08/31/2024_________________
Permit Conditions:
Permit Conditions: This OWTS Permit is approved on the condition of compliance with the design as
submitted by CBO dated June 17, 2023. Changes must be approved by Garfield County Public Health
and the designer prior to construction.
The new OWTS will serve a new 4-bedroom residence and an existing cabin. The system will consist
of a new, two-compartment minimum 1,500-gallon septic tank set level with access to grade and an
effluent filter in the outlet tee of the tank. Effluent will gravity flow to a distribution box set level
with access to grade that will distribute effluent to 1,080 ft2 of STA. The new STA will consist of 5
gravelless trenches. Each row will consist of 18 Quick4 chambers, for a total of 90 Quick4 chambers.
Inspection ports are to be installed at each end of each trench. Maintain all setbacks and elevations
as designed.
Contact 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.
08/31/2023
Issued By: Garfield County Environmental Health
Department
Date
832‐R‐13‐002