HomeMy WebLinkAboutOWTS Review CommentsOWTS Permit # SEPT-7356
Review Comments
Reviewed 01/13/2022 by SAM
New OTWS for new 4 bedroom residence plus Beauty Shop with 1 chair
Paid app fee.
Design and report by Boundaries Unlimited dated June 27, 2021.
Soils analysis by K&A on August 23, 2020. Soil Type 2A- LTAR= 0.5
2 soil pits were dug to a maximum depth of 7 feet. No bedrock or ground water
was encountered.
Design Calculations:
-Average Design Flow= 75 GPD x 2 people/bedroom x 3 + 75 gallons per 1 additional bedroom + 1 chair
at beauty shop = 100 + 525= 625 GPD/0.5 LTAR = 1252
LTAR- 0.5
Factored treatment calculation= 1250 x 1.0 x 0.7= 875 gpd
-FACTORED SOIL TREATMENT AREA (STA): Pressure dosed bed 1.0 and chambers 0.7
Domestic water is supplied via an existing well on the property. The water line
will not come within established Regulatory setbacks (meets Regulations).
Design flow used for design meets Regulatory requirements (Table 6-1 => 4
bedrooms = 525 gpd).
The design will include a 3 chamber 1500-gallon septic tank with a 500 gallon
high head pump and risers to bring access to grade.
Effluent will pressure dose to manifold at a rate of 30 gallons/120 seconds 1
times per day to be distributed to the STA. Drain Back volume- 29.5
Minimum STA calculated appropriately (875 ft2 minimum).
Design recommends 1 gravelless bed with 4 trenches 10 Quik4 chambers per
trench for a total of 76 Quik4 chambers or 15 Arc 36 chambers for a total of 59
chambers (876 or 885 ft 2 total STA).
Observation ports located at the beginning and end of each trench.
Property Owner: Michael & Sarah Perdue/ 970-948-1735
Parcel #: 2407005400086
Engineer: Boundaries Unlimited/ 970-945-5252 ext. 01
Project Location: 357 CR 309 Parachute, CO