HomeMy WebLinkAbout04-02-1984 Septic System Design SpecificationsLnRliY RADER
HEVIDED SYiiTEM DESIGN
LOT in, BLOCK 1
ABINGDON GLEN
l}-2-0l4.
1. Percolation Rato, Type of Syateni.
14.1 minutes per Inch for the new primary sitefholes 7“9).
Use shallow trench system with trenches no deeper than 2.0
feet in the natural soil. Use the old primary site as the
new alternate site.
2. Proposed Flow Rate.
5 possible bedrooms 1^0 G.P.D. is 750 G.P.D.
3. Soil Treabiiient Area Required.
Use 1.67 percolation rate factor x 750 G.P.D. for 12^0 Sq. Pt.
)|.. Size and Number of T^^cnches.
)4- trenches 3 feet wide and IClj feet long is 1250 Sq. Pt.
These trenches would be spaced a minimum of 7*5 feet a|uirt
center to center.
5.Drainfield Rock Needed.
69.5 cubic yds. of rock is needed bo have 12 inches under and
2 inches over a 4 inch distribution .pipe.
6. Septic Tanks.
Two tankn each of 1000 gallons are recommended. It addition,
it will ‘be necosaary to have a pump in a third pumping tank
in order bo reach the higher drainfield area. An alarm device
should be used bo warn of j'ump failure.
Sincerely,
PERGOR, INC,
I'iarlt C. Gronberg, P.E.