474 Disposal System Design PROPOSED DOMESTIC SUBSURFACE DISPOSAL SYSTEM DESIGN
Prepared For: l t d ich.ti l e
Location: Sr— i^�i .1-- 7- t) nin
Number of Bedrooms: //3 Garbage Disposal:
/Ga
LEACH AREA DESIGN
.3 Bedrooms x 2 persons/bedroom = 6i persons
(o Persons x 55 gallons of wastewater/person/day = S30 total gallons of
wastewater/day.
Percolation Rate: 2. 0 min/inch
Gallon of wastewater/square feet of leach area for a Percolation Rate of:
Z. 0 min/inch = 2:47 Gal/SF Sidewall Area
/•b Gal/SF Bottom Area
* If a leach bed is to be installed, no sidewall is allowed.
* If percolation rate exceeds 20 min/inch, no bottom area is allowed.
- SEPTIC TANK -
* WITHOUT GARBAGE DISPOSAL:
Gallons of wastewater/day x 150% = REQUIRED effective liquid
capacity of septic tank.
RECOMMENDED: Septic Tank
* In no case will the septic tank be less than 1,000 gallons (effective liquid capacity).
** WITH GARBAGE DISPOSAL:
330 Gallons of wastewater/day x 200%, = C.&O REQUIRED effective liquid
capacity of septic tank.
RECOMMENDED: /Spa Septic Tank
** In no case will the septic tank be less than 1,500 gallons (effective liquid capacity),
ALMER HUNTLEY, JR., & ASSOCIATES, INC.
LEACHING PIS N
Precast Pit Used /0 ' Long x
S Wide x 2 ' Effective Depth
Using
!/ of stone all around and /• O ' of stone under pit.
•
SIDEWALL AREA:
Long x ' Effective Depth x 2 Sides = /O
SF
/3 ' Wide x 3 Effective Depth x 2 Sides -
15 SF
Total of /g(o SF (Sidewall Area) x
2 •S� Gal/SF a 4/4.57 Gal/Pit (Sidewall
BOTTOM ARE :
l8 ' _-cg x /3 ' ide = zszle SF
13 '/ SF (3ottCQ Area) x
* Without Garbage Disposal:
Flow) = _Ili--* With Garbage Disposal: 1.5 x
3�p Gal/Day (Daily (REQUIRED'
Gal/Day (Daily Flow) G 9 9
Gal/Pit at — Pic(s)
Using S/y3
/. O Gal/SF = 2 215/ Gal, Pic (Bottom)
4/Ca J ai/Pit (3:13v3it)
' 2 3a( Gal/Pic (3octct)
Tarp'. Gal/Pit (Des'_gned)
Total Gal/Day (REQUIRED)
NOTE: •d/1 wage Wit
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ALMER HUNTLEY, JR. a ASSOCIATES , INC.
REGISTERED LAND SJRJEVORS l Cf E4GIMEERS
125 PLEASANT STREET
NORTHAMPTON , MASS .