HomeMy WebLinkAboutInstallation Observations 01.07.202133 FOUR WHEEL DRIVE ROAD
CARBONDALE, CO 81 623
970.309.5259
CARLA.OSTBERG@GMAIL.COM
January 7, 2021
Chuck Cole
chuck@holmesexcavation.com
Onsite Wastewater Treatment System (OWTS) Installation Observations
2321 CR 100
Garfield County, Colorado
Permit Number SEPT-02-20-6140
Chuck,
Project No. C1492
CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on April 7 and
August 18, 2015 for the subject property. You, the property owner, installed the system.
The OWTS design is based on 3-bedrooms in an accessory dwelling unit (ADU). An average daily
wastewater flow of 450 GPD was used. Use of the ADU near -term will include 2-bedrooms with a
commercial kitchen used for baking cakes. We recommend monitoring wastewater flows by keeping
track of pump cycles. The quality of the wastewater should not be significantly impacted by a cake
baking operations.
The sewer line exiting the residence has a double -sweep clean out and a minimum 2% grade to the
septic tank. The system installation included a 1250-gallon, two -compartment concrete septic tank with
an Orenco® Biotube Pump Vault and an Orenco® PF3005 pump in the second compartment of the septic
tank. There is an effluent filter in this compartment. This filter must be cleaned annually, or as needed.
Deadmen were used to anchor the septic tank due to high seasonal groundwater conditions. The floats
were set to dose approximately 70 gallons each pump cycle, allowing approximately 4 gallons of drain back
after 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 performed start-up of the pumping system.
The excavation for the sand filter began 2-feet below native grade with a level base for the sand filter. The
1.5-inch diameter pump line maintained a minimum 1 % slope for drain back to the septic tank after each
pump cycle. Effluent is pressure dosed through a 1.5-inch diameter pump line to a 12' x 47' partially
mounded, unlined sand filter with a minimum of 2-feet of sand filter material.
Laterals were connected with a 1.5-inch diameter level manifold. Laterals used to disperse the effluent were
surrounded by washed coarse screened gravel. Laterals were 1.5-inches in diameter with 5/32-inch
diameter orifices facing down, spaced 3-feet on center (OC). Each 1.5-inch diameter lateral ends in a
sweeping ell facing up with a ball valve for flushing. A soil separation fabric was placed over the gravel
layer followed by approximately 1-foot of topsoil or other suitable soil able to support vegetative growth. The
mound has a minimum 3:1 slope (horizontal:vertical).
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 of the expertise of the installer, soil
type, and weather conditions.
Please call with questions.
Sincerely,
CBO Inc.
(eL OV-bAs
Carla Ostberg, MPH, REHS
Clean out
Reviewed By:
Romeo Baylosis, P.E.
Sewer line to septic tank
4' ui ns t
480 9sf
NVC
Inlet tee
Deadmen
1250 gal stamp
Cables supporting Deadmen
`--
^
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Septic tank backfilled
Excavated footprint ofmound
Sand filter material
Pump line entering manifold
Laterals on gravel base with orifice shields
Control Panel
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Garfield County
Public Health
Garfield County Public Health
2014 Blake Ave.
Glenwood Springs, CO 81601
Phone: (970) 945-6614 ext. 8150
OWTS PERMIT
KEEP AVAILABLE AT PROJECT SITE
Permit Number SEPT-6140
Permit Type X New X Repair X Remodel/addition
Issue Date 03/11/2020 Expiration Date 03/11/2021
For inspections, call: 970-945-6614 ext. 8150 and call the Design Engineer, if applicable.
Project Address: 2321 County Road 100, Carbondale, CO 81623 Parcel No.: 2393-364-00-272
Owner Name: Charles Cole Rev Trust Owner Phone: (97Q 379-2245
Designed Sy: Carla Ostberg with CBO, INC. Designer Phone: (970) 309-5259
Contractor: Holmes Excavation
Contractor Phone: (970) 963-2007
Number of Bedrooms 3 Minimum Tank Capacity 1.250 gal Minimum Absorption 562.5 ft2
Permit Conditions:
This OWTS Permit is approved on the condition of compliance with the design as submitted by CBO,
INC dated January 2, 2020. Changes must be approved by Garfield County Public Health and the
designer prior to construction.
The new OWTS will serve a two -bedroom residence plus a commercial baking kitchen that may be
converted to a bedroom in the future and consist of a 1,250-gallon, two -compartment concrete
septic tank set level and accessible at grade with a pump in the second chamber of the tank,
followed by a 1.5" diameter manifold set level to distribute effluent to 564 square feet of Soil
Treatment Area (STA). The STA consists of 3 level 1.5-inch diameter laterals placed on a mounded,
unlined sand filter with inspection ports at each corner of the bed. Orifice holes in the laterals are to
be 5/32-inch diameter facing down, with orifice shields, drilled 3 feet on -center along the laterals.
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.
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 heen 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 t stem ill be issued.
I sued By: Garfield County Environmental Health
Department
03/11/2020
Date
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GRAIN
1 0 1
SIZE - mm.
0.01 0.001
% +3„
% Gravel %Sand
% Fines
Coarse
Fine Coarse Medium Fine
Silt j Clay
0
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2
SIEVE
PERCENT
SPEC.*
PASS?
Soil Description
SIZE
FINER
PERCENT
(X=NO)
ASTM C 33 Sand
3/8"
#4
#8
100
100
84
100
95 - 100
80 - 100
Atterberg Limits
#16
#30
#50
65
43
18
50 - 85
25 - 60
10 - 30
PL= LL= Pl=
Coefficients
#100
#200
6
2.5
2 - 10
0.0 - 3.0
Dg0= 3.0678 D85= 2.4655 D60= 1.0119
D50= 0.7441 D30= 0.4184 D15= 0.2523
D10= 0.1890 Cu- 5.35 Cc- 0.92
Classification
USCS= SP AASHTO=
Remarks
ASTM C 33 - Sand
Source of Sample: WSM
Sample Number: 165-19 Date: 5/23/2019
Kumar & Associates, Inc.
Glenwood Springs, Colorado
Client: WestemSlopeMaterials
Project: Misc. Lab Testing
Project No: 16-7-196 Figure 31
Tested By: KO
Checked By: TJW
Do Your Part, Be SepticSmart:
The Do's and Don'ts of Your Septic System
Learn these simple steps to protect your home, health, environment and property value:
septicsmart
U.S. Environmental Protection Agency
Do:
• Have your system inspected (in general) every three years by a licensed contractor
and have the tank pumped, when necessary, generally every three to five years.
Don't:
• Pour cooking grease or oil down the
sink or toilet.
• Rinse coffee grounds into the sink.
• Pour household chemicals down the
sink or flush them.
Do:
• Eliminate or limit the use of a garbage
disposal.
• Properly dispose of coffee grounds a
food.
• Put grease in a container to harden
before discarding in the trash.
Don't:
• Flush non -degradable products or
chemicals, such as feminine hygiene
products, condoms, dental floss,
diapers, cigarette butts, cat litter, paper
towels, pharmaceuticals.
Do:
• Dispose of these items in the trash can!
Don't:
• Park or drive on your drainfield. The
weight can damage the drain lines.
• Plant trees or shrubs too close to your
drainfield, roots can grow into your
system and clog it.
Do:
• Consult a septic service professional to
advise you of the proper distance for
planting trees and shrubs, depending on
your septic tank location.
Don't
• Concentrate your water use by using
your dishwasher, shower, washing
machine, and toilet at the same time.
All that extra water can really strain
your septic system.
Do:
• Stagger the use of water -generating
appliances. This can be helpful
especially if your system has not been
pumped in a long time.
• Become more water efficient by fixing
plumbing leaks and consider installing
bathroom and kitchen faucet aerators
and water -efficient products.
For more SepticSmart tips, visit: www.epa.gov/septicsmart
ISEFA 832-R-13-002 • September 2013