HomeMy WebLinkAboutAs-built Report 11.27.2018DRAINAGE, UTILITY AND DITCH EASEMENT PER PLAT REC. NO. 544219
LOT 1
3.71AC.f
ABSORPTION
TRENCHES 14 EA
INFILTRATRORS.
.F. TOTAL AREA
Waste Water
Flow
Reference:
5 CCR 1002-43
Section 43.6
Design Flow.
75
gpd/person
No. Bedrooms:
3
No. people/bedroom
2
Total Daily Flow
450
gallons
(Table 6-1)
Percolation Data
Percolation tests performed Oct. 13, 2018
No ground water within 8' of theround surface
Average percolation rate = I 26.8 min/inch
IMPORTANT NOTE: On site water was used in the percolation tests.
Use of imported water (e.g, City of Glenwood Springs) for tests is invalid c
produces erroneous results that do not represent actual percolation rates.
Table 10-1 Soil Structure and LTAR
LTAR = 0.5 Gal/Day/Square Foot
Table 10-2 - Size adjustment for Application Method
No reduction; gravity flow for a trench (chanter)
Table 10-3 - Size ad
ustment for distribution media
Trench:
reduce to 70% of calculated area
REQUIRED TRENCH AREA
450 gpd / 0.5 gaVday/SF =
900
Table 10.3 reduction =
0.7
Net Required Trench Area:
630
S.F.
Design
Recommend Infiltrator brand or
equal, low profile
34" wide
48" effective length
S.F./Infiltrator
11.33
No. required:
55.6
Use 3 trenches
18.5
- Round to units each
trench
19
Total # chambers:
57
Total length of each trench:
76
Feet
Note:
Clear distance between trenches
6
feet
(measured adjacent sidewall to adjacent sidewall)
DESIGN AND CONSTRUCTION NOTES:
• Septic tank: 1,250 gallon. Install an effluent filter on the distribution end.
• Infiltrator brand low profile chambers or equal. Adjust the following calculations if a different brand or size
is used.
• Net absorption trench area = 630 s.f
• Designed for 3 bedroom home + auxiliary buildings (e.g„ shop)
• Design flow = 450 gpd
• Average percolation rate = 26.8 min/inch
• Soils are deep sandy silty loam, continuous. No water table within 8' of the ground surface. LTAR = 0.5
gal/day/SF.
• Each trench: 76 feet long x 34" wide (dig 36" wide). 19 chambers/trench are required.
• Trenches shall be as level as possible. Plans show the trenches parallel with the contours. This is
optional.
• Install 6" diameter PVC inspection ports at each end of each trench. Cover with an irrigation box at
grade.
• Min. of 18" soil over top of chambers.
• Lightly compact fill over top of chambers. Mound topsoil 6"-12" to allow settlement.
• Field fit elevations to septic tank / house elevations.
• Distribution lines: min. 4" diameter PVC
• Use 1x3 distribution / splitter box (gravity) = aw4 V @
• Place splash blocks under inlets to minimize erosion
•. d G, .G Uh ;
COMPLIANCE NOTES •\.•
• Offset to well = 207 feet ' // X/ " 24753 .
119 feet
VON
• Offset to nearest open ditch =
INSTALLATION INSPECTED NOV. 28, 2018 BY / • 4 c �'_" • • • • • ° `
PAUL C. CURRIER, P.E. ALL ITEMS WERE/d
INSTALLED IN CONFORMANCE WITH
SPECIFICATIONS. A FIELD CHANGE WAS MADE
TO USE 4 ROWS OF INFILTRATORS.
NOV 2018 / 14MAR19
501-1.0 LOT 1 ISDS.DWO
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CHKD : PCC