HomeMy WebLinkAboutInstallation Observation 05.01.2023CBO Inc.
129 Cains Lane
Carbondale, CO 81623
970.309.5259
carla.ostberg@gmail.com
May 1, 2023 Project No. C1811
Ian Young
ityoungpainting@yahoo.com
Onsite Wastewater Treatment System (OWTS) Installation Observations
182 Darrow Street
Garfield County, Colorado
OWTS Permit SEPT-8228
Ian,
CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on November 1,
2023 for the subject property. E&L Trucking installed the system.
The OWTS design is based on 5-bedrooms. An average daily wastewater flow of 750 GPD was used.
The existing sewer line was replaced with a new, 4-inch SDR-35 sewer line with a minimum 2% grade to
the septic tank and a double-sweep clean out. An additional sewer line exits the east side of the
residence and enters the side of the septic tank.
The system installation will include a 2000-gallon, two-compartment Valley Precast concrete septic tank
with an Orenco® Biotube Pump Vault and an Orenco® PF3005 pump in the second compartment of the
septic tank. There is a filter in this compartment that must be cleaned annually, or as needed. The
floats were set to dose approximately 83 gallons each pump cycle. The control panel for the pump is located
within line of sight of the septic tank. Valley Precast out of Buena Vista be performed start-up of the pumping
system.
Effluent is pumped through a 1.5-inch diameter pump line from the pump chamber to an Orenco®
automatic distributing valve (ADV), model 6403. The ADV was placed at a high point in the system in an
insulated riser with access from grade.
Effluent is pressure dosed to through 1.5-inch diameter distribution lines to three 12’ x 26’ beds. This results
in a total of 312 square feet per bed, and a total of 936 square feet. This is 1.5 square foot short of the
required area; however, given the constraints of the lot and the fact that this system replaces a cesspool, the
shortage will not adversely impact the overall functioning of the STA.
A minimum of 2-feet of sand filter material was installed in the over-excavated footprints. A gradation of
the sand media is enclosed.
Laterals are 1.5-inches in diameter with 5/32-inch diameter orifices facing down, spaced 2-feet on center,
installed on the GeoMat™ with the filter fabric over the laterals. Laterals were placed 2-feet from the edges
of the bed with 3.0-feet between the laterals. Laterals are connected with 1.5-inch diameter level manifolds.
Four 39” wide GeoMat™ sheets were placed on the 12-foot wide beds.
Each 1.5-inch diameter lateral ends in a sweeping ell facing up with a ball valve for flushing. Valves
should be placed in a 10-inch sprinkler box for access. Laterals were covered by a soil separation fabric
and at least 1-foot of topsoil or other suitable soil able to support vegetative growth. Inspection ports were
placed at each corner of each bed. 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
View of sand filters with GeoMat (laterals placed under filter fabric)
View of septic tank
Sewer line from east side of building Sewer line from north side of building
Sewer line out of east side of building Inlet tee
Pump chamber ADV
View of beds (all laterals placed under filter fabric)
Manifold Control Panel
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: 182 Darrow St Glenwood Springs, CO Parcel No.: 218527106004
Owner Name: Compass Peak Properties Owner Phone: (970) 309-8544
Designer: CBO Designer Phone: (970) 309-5259
Number of Bedrooms _5__Minimum Tank Capacity __2,000_gal__Minimum Absorption _937.5 ft 2
OWTS PERMIT
KEEP AVAILABLE AT PROJECT SITE
Permit Number _SEPT-8228_
Permit Type X New X Repair X Remodel/addition X Tank only
Issue Date 08/28/2023 Expiration Date 08/28/2024
Permit Conditions:
This OWTS Permit is approved on the condition of compliance with the application as submitted and
plans dated June 19, 2023, by CBO. Changes must be approved by Garfield County Public Health and
the designer prior to construction.
The new OWTS will serve an existing mixed-use structure that is currently on the site. A remodel of
the structure is proposed that will result in a triplex with a total of 5 bedrooms. The existing cesspool
is to be abandoned in place. The existing sewer line is to be replaced. The new OWTS will include a
new 2,000-gallon two-compartment tank, set level with risers to bring access to grade with a pump
package in the second compartment to distribute effluent to 937.5 ft 2 of STA. The STA will consist of
three GeoMat beds 12-feet wide by 26-feet long placed on 2 feet of secondary sand media with six
feet between each bed. Laterals will consist of 1.5-inch diameter Schedule 40 PVC with 5/32-inch
orifice holes spaced 2 feet on-center (O.C.). Effluent will be dosed at 83 gallons per cycle with
approximately 1 gallon of drain-back. Flushing valves are to be installed at the end of each lateral, as
well as inspection ports installed in each corner of each bed. Maintain setbacks as indicated above
and on the plans.
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.
08/28/2023
Issued By: Garfield County Environmental Health
Department
Date
832‐R‐13‐002
