HomeMy WebLinkAboutEngineer's Installation Observation 08.21.2015ALL
SERYICE
6147 Braun Court
Arvada, CO 40004
303.908.7823
August 21, 2015
Keith Elhers
Three Sail Enterprise
Grand Junction, Colorado
kehlers threesaiI.net
Onsite Wastewater Treatment System (OWTS) Installation Conformation for ADU
Leable Residence
Garfield County, Colorado
Mr. Ehlers,
ALL SERVICE septic, LLC reviewed the installation of the onsite wastewater treatment system
(OWTS) for the subject 2 bedroom ADU.
The installation included a 1000 -gallon, two-compartment NorwecoTM septic tank, followed by 2 rows
of 8 ADS chambers each, for a total of 16 chambers and 240 SF of infiltrative area. Observation
ports were installed. Effluent is distributed serially within the trenches, via a 4" overflow SDR 35 PVC
pipe.
Design Calculations:
Daily Wastewater Flow = 75 x 2 x 2 Bedrooms = 300 GPD
LTAR (Per Garfield County Public Health Regulation = 0.8 GPD/SF (Treatment Level 1)
STA Calculations = 300 gallons/day / 0.8 SF/gallon (Soil Type 1, TL1) = 375 SF
Gravity trenches with chambers (x 0.5) = 187.5 SF
ADS Chambers = 16 total chambers = 240 SF of STA
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. Pump the septic tank yearly.
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:
Timothy Petz, P.G.