HomeMy WebLinkAboutOWTS Installation Observations 07.10.2017
July 10, 2017 Project No. C1281
Alleghany Meadows
alleghanym@gmail.com
Onsite Wastewater Treatment System (OWTS) Installation Observations
250 Willow Lane
Garfield County, Colorado
Permit Number SEPT-04-17-4683
Alleghany,
ALL SERVICE septic, LLC observed the installation of the onsite wastewater treatment system (OW TS)
on April 26, May 5, and June 26, 2017 for the subject property. Hagist Excavation installed the system.
The existing septic tank was pumped, crushed, and abandoned in-place. The existing soil treatment area
(STA) was also abandoned in place.
The new system installation included a 1500-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.
The septic tank was anchored with Deadmen because of the high seasonal groundwater table. The floats
were set to dose approximately 90 gallons each pump cycle. The control panel for the pump is located
within line of sight of the septic tank. Valley Precast personnel performed start-up on the pumping system.
Effluent is pressure dosed through a 1.5-inch diameter pump line to a mounded, 10’ x 52.5’ unlined sand
filter. The excavation for the sand filter began 1.0-foot below native grade. A minimum of 3-feet of sand filter
material was installed in the over-excavated footprint, resulting in 2-feet of sand filter material extending
above native grade.
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 and connected
with a 1.5-inch diameter level manifold. 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 to support vegetative growth.
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 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,
ALL SERVICE septic, LLC Reviewed By:
Carla Ostberg, MPH, REHS Richard H. Petz, P.E.
Existing septic tank abandoned
Sewer lines from house to tank
Prep for setting tank Anchoring with deadmen
Pump line exiting the septic tank (high groundwater in tank excavation)
Scaping vegetation for base of mound
Sand for mound system
Placement of gravel and laterals
Control panel
Inlet tee Tank lids to grade
Lids looking toward mound Flushing valves
Inspection ports
832‐R‐13‐002