Commercial contractor study guide
Absorption field sound required what linear length - ANS-500ft
Access openings min and max - ANS-Min 15 inch free space max 24
Access to finish grade must be proceeded t or f - ANS-T
All dosing tanks must have liquid capacity of what percent of the interior volume of the
absorption lines - ANS-60-75
Alternating absorption filed required when - ANS-The total linear length exceeds 1000ft
Alternating siphons are used with systems of how many feet - ANS-More than 1000
As dosing tank fills what happens to the head pressure - ANS-It increases in the tank to a point
that will force effluent thru the siphon
Can dosing tank have single compartment - ANS-Yes
Conventional, polystyrene l, and bundled pipe dosing shall be based on - ANS-1/2 gallon per
linear foot
Do all septic tanks need to be constructed on site - ANS-No, only large ones
Dosing tanks water tight access cover should be how big and how low below ground surface -
ANS-24 inch diameter, no more than 12 inch below ground surface
Effluent from grease traps must be deposited into where - ANS-The inflect of the septic tank
along with the other water carried waste from the facility
Grease cleaned what retention - ANS-75%
How can reinforcing (pour in tank) be accomplished? - ANS-Using a minimum 6 inch by 6 inch
no.10 gage welded Steel reinforcing wire or fibrous reinforcing conforming to ASTM
specifications
How deep should tees extend? - ANS-Into the liquid a minimum of 25% and maximum 50%
depth
Absorption field sound required what linear length - ANS-500ft
Access openings min and max - ANS-Min 15 inch free space max 24
Access to finish grade must be proceeded t or f - ANS-T
All dosing tanks must have liquid capacity of what percent of the interior volume of the
absorption lines - ANS-60-75
Alternating absorption filed required when - ANS-The total linear length exceeds 1000ft
Alternating siphons are used with systems of how many feet - ANS-More than 1000
As dosing tank fills what happens to the head pressure - ANS-It increases in the tank to a point
that will force effluent thru the siphon
Can dosing tank have single compartment - ANS-Yes
Conventional, polystyrene l, and bundled pipe dosing shall be based on - ANS-1/2 gallon per
linear foot
Do all septic tanks need to be constructed on site - ANS-No, only large ones
Dosing tanks water tight access cover should be how big and how low below ground surface -
ANS-24 inch diameter, no more than 12 inch below ground surface
Effluent from grease traps must be deposited into where - ANS-The inflect of the septic tank
along with the other water carried waste from the facility
Grease cleaned what retention - ANS-75%
How can reinforcing (pour in tank) be accomplished? - ANS-Using a minimum 6 inch by 6 inch
no.10 gage welded Steel reinforcing wire or fibrous reinforcing conforming to ASTM
specifications
How deep should tees extend? - ANS-Into the liquid a minimum of 25% and maximum 50%
depth
