Septic Tanks and Drainfeilds Flashcards
in order to determine the absorption qualities of soils for a proposed disposal field, code requires that the proposed site be:
subjected to a percolation test
the minimum sidewall of a seepage pit shall be at least
10 feet below the inlet
what is the minimum gallon capacity for a septic tank
750 gallons
the minimum liquid capacity of a septic tank serving 2 bedrooms 3 bath residence is
750 gallons
effluent or drainage from a home clothes washing machine may be disposed of by drainign
through a sanitary system connected to a septic tank
no cesspool, septic tank, seepage pit or drainfield shall be connected to any public sewer or to any building sewer leading to such public sewer (T/F)
true
a four inch concrete pad shall be poured around the well casing and shall extend ____ inches on all sides
18
maximum length of a single tile drainfield lateral shall be ____ feet
100
where distribution drain lines in leaching beds are used, the maximum distance between centers of distribution lines shall not exceed:
6 feet
where distribution drain lines in leaching beds are used, the minimum distance between centers of distribution lines shall not exceed
4 feet
a cesspool is 48 inches in diameter and 20 feet deep. if filled to the top with water the volume in gallons would most nearly be
1880
according to code, a septic tank cannot be installedcloser than ____ feet to the building water supply service.
5 feet
the liquid capacity of all septic tanks for dwelling units is determined by the number of
bedrooms
a septic tank for a 4 bedroom house must have a capacity of at least ____ gallons
1200
cast-in-place septic tanks located in a parking lot shall be designed to support the anticipated load but not less than that of a
ten ton truck
the minimum distance from a drainfeild to a basement wall shall be ____ feet
8
the minimum air space within a septic tank is
9 inches
residential septic tanks
shall be rectangualr in shap
the disposal feild line is sized by what
-septic tank size
-type of soil
-waste flow rate
a concrete septic tank shall be protected from corrosion by bituminous coating extending ____ inches below the water line
4
the minimum size hydropneumatic tank for a single family residence shall be
42 gallons
a disposal well for roof water shall be precceded by
a settling tank
what should be installed in a septic tank to reduce the scum agitation
baffle
when would a septic tank require cleaning
when the sludge is 1/4 the depth of the tank
when would be the best time to inspect a septic tank
durring periods of high flow
which of the following will not be reduced to a liquid form in a spetic tank
mineral substance
a cubic foot of water contains
7.48 gallons
a rectangular tank 4 feet long, 2 feet wide and 2 feet deep would contain ____ cubic feet
16
a rectangular tank 4 feet long, 2 feet wide and 2 feet deep would contain approximatley ____ gallons of water
119.7
which type of bacteria breaks down to liquids in a septic tank
anaerobic
how are required residential septic tanks sizes determined?
by the number of bedrooms
in a disposal feild, approved drainage pipe must be laid in a trench that has a minimum width of ____ inches. The maximum width is ____ inches
18-36
in a disposal field, approved drainage pipe must be laid in a trench that is near level. The maximum slope in 100’ is ____ inches
3
in a disposal field, approved drainage pipe must be laid over ____ inches clean stone gravel, slag or similar material. There, then, must be a minimum of ____ inches of filter material over the drain line
12
2
a disposal feild must have minimum distance of seperation of seperation from a soakage pit of ____ feet.
5
a disposal field must have a minimum earth cover of ____ inches
12
a disposal field must have a minimum distance of seperation from a basement wall or terraced area of ____ feet.
8
Blank
8
disposal fields must not be located within ____ feet of property lines other than public streets, alleys or sidewalks.
5
Disposal fields must not be located within ____ feet of water supply lines
5
disposal fields must not be located under any building or within ____ feet of any building
5
disposal fields must not be located within ____ feet of any provate water supply well whcih provides water for human consumption, bathing, or swiming
100
the septic tank cannot be located within ____ feet of a provate water supply well which provides water for human consumption, bathing or swimming
50
the septic tank cannot be located under or within ____ feet of any building
5
the septic tank cannot be located within ___ feet of any building
5
The septic tank cannot be located within ____ feet of the shore line of open bodies of water
50
the septic tank cannot be located within ____ feet of property lines other than public streets, alleys or sidewalks.
5
access to each esptic tank shall be provided by at least two manholes ____ inches in minimum dimensions
20
the inlet and outlet pipe or baffle of a septic tank shall extend ____ above and at least ____ below the water surface
4”
12”
All septic tank covers shall be capable of supporting an earth load of not less than ____ pounds per sq foot
300
the minimum wall thickness of any steel septic tank shall be ____ and each such tank shall be protected from corrosion both externally and internally
12 gauge
if you are a contractor and you discover a septic tank in the ground, what agency do you contact or do you just dig around it
building department
