HomeMy WebLinkAboutOWTS Installation Observations 06.10.19
June 10, 2019 Project No. C1429-A
Max Filiss
max@dividecreekbuilders.com
Onsite Wastewater Treatment System (OWTS) Installation Observations
2-Bedroom Cabin
Cabin Parcel 1
398 CR 136
Garfield County, Colorado
Permit SEPT-03-19-5675
Max,
ALL SERVICE septic, LLC observed the installation of the onsite wastewater treatment system (OWTS)
on April 9, 2019 for the subject property. Avalanche Excavation installed the system.
Canyon Creek runs to the east of the cabin. All OWTS components were at least 50-feet from Canyon
Creek. We also verified the required 50-foot setback to other waterways, including ponds and a creek
tributary, on the property.
Two new 4-inch diameter SDR-35 sewer lines, each with double sweep clean outs were installed at the
2-bedroom cabin. This sewer lines had a minimum 2% grade to the septic tank. A new 1000-gallon, 2-
compartment concrete Valley Precast septic tank with an Orenco® ProPak and an Orenco® PF3005
pump in the second compartment of the septic tank was installed. There is a filter in this compartment of
the septic tank. The filter must be cleaned annually, or as needed. The floats were set to dose
approximately 60 gallons, allowing for 18 gallons of drain back each pump cycle. The control panel is
located on the west side of the cabin. Valley Precast performed start-up of the pumping system.
Effluent was pressure dosed through a 1.5-inch diameter pump line from the septic tank to the STA. The
pump line had minimum 1% grade for proper drain back into the pump chamber of the septic tank after
each pump cycle and ends at a high point at the connection to the manifold.
The STA consists of a chamber bed with three rows of 10 ‘Quick 4’ Standard Plus Infiltrator® chambers
for a total of 30 chambers and 360 square feet of infiltrative area.
Effluent is pressure dosed to a 1.5-inch diameter level manifold and 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 holes facing down for drainage, 2-feet on center. Each
lateral ends in a 90 degree ell facing up with a ball valve for flushing. Valves were placed in a valve box,
accessible from grade. Inspection ports were placed at each corner of the chamber 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. ALL SERVICE septic, LLC should be notified if changes are
made to the OW TS 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,
ALL SERVICE septic, LLC Reviewed By:
Carla Ostberg, MPH, REHS Richard H. Petz, P
Final grading of bed / inspection ports and flushing valves accessible
6/12/19
View of north end of bed looking toward pond
Septic tank installation / clean outs near buildings / 2 sewer lines exit building
Pump chamber spice box
View of pump chamber Control panel on west side of cabin
Inside control panel
Inlet tee view of STA, looking south
Inspection ports and flushing valves
Pipes hung underside of chambers
View of chamber bed manifold
Sweeps on laterals pump line from septic tank
Pump line from tank to STA
Pump line into STA sewer lines from cabin into septic tank
832‐R‐13‐002