RESIDENTIAL CONTRACTOR EXAM
Setback80for80Wells80and80Springs80-80ans--
✔✔50'80from80tank80and80100'80from80absorption80field
Setback80for80Property80Lines80-80ans--
✔✔10'80from80tank80and805'80from80absorption80field.8050'80from80adjacent80property80lin
es
Setback80for80Bodies80of80Water80or80Impoundments80-80ans--
✔✔25'80from80tank80and8050'80from80absorption80field
Setback80for80Streams80or80Tributaries80-80ans--
✔✔25'80from80tank80and8050'80from80absorption80field
Setback80for80Ponded80Wetlands80-80ans--✔✔50'80from80absorption80fields
Setback80for80Building80w/80Basement80-80ans--✔✔10'80from80foundation
Setback80for80Building80w/out80Basement80-80ans--
✔✔Absorption80field805'80from80foundation80and80tank8010'
Setback80for80Surface80Drainage80Ditch80-80ans--✔✔Tank8015'80from80drainage80ditch.
Setback80for80Subsurface80Drainage80-80ans--
✔✔10'80upgrade80or8030'80downgrade80from80absorption80line
Setback80for80Water80Supply80Lines80-80ans--
✔✔If80within8010'80of80absorption80field,80water80supply80line80shall80be80at80least8012"80
above80the80top80of80aggregate80layer
First80Component80of80on-site80sewage80management80system80-80ans--
✔✔Septic80Tank
Minimum80Septic80Capacity80for801-480bedrooms80-80ans--✔✔1,000
Septic80Capcity80increases80by80how80much80per80each80additional80bedroom80over804?
80-80ans--✔✔250
How80much80should80tank80increase80with80garbage80disposal?80-80ans--✔✔50%
, Primary80Purpose80of80Septic80Tank80-80ans--
✔✔Settling80out80of80solid80matter80from80liquid
Which80is80higher80-80Outlet80or80Inlet?80-80ans--✔✔Inlet
How80many80inches80difference80between80outlet80and80inlet?80-80ans--✔✔2
How80should80a80properly80installed80septic80tank80be80placed?80-80ans--
✔✔Level,80on80undisturbed80earth,80and80constructed80to80prevent80surface80water80fro
m80entering80the80tank
When80is80a80riser80required?80-80ans--
✔✔If80more80than801280inches80of80cover80is80to80be80placed80over80the80tank
What80must80be80installed80on80the80outlet80end80of80the80tank?80-80ans--
✔✔An80approved80filter
When80is80a80grease80trap80required?80-80ans--
✔✔When80grease80exceeding805080milligrams80per80liter80may80be80introduced80into80a8
0system
Where80is80effluent80from80grease80trap80deposited?80-80ans--
✔✔The80tank80and80not80the80absorption80field
When80are80pump80systems80necessary?80-80ans--
✔✔If80gravity80flow80is80not80possible80to80access80the80desired80absorption80field80for80
any80type80of80system
What80type80of80pumps80must80be80used?80-80ans--
✔✔Submersible80and80wastewater80approved
What80must80pumps80be80capable80of80delivering?80-80ans--
✔✔Flow80at80designed80total80dynamic80head
Where80should80pumps80not80be80placed?80-80ans--✔✔Inside80the80primary80tank
Dosing80Tank80Volume80-80ans--
✔✔Needs80to80have80sufficient80volume80to80provide80desired80dosing80volume80plus80r
eserve80volume.
Reserve80volume80-80ans--✔✔Estimated80daily80wastewater80flow
What80is80an80aggregate80system80-80ans--
✔✔Approved80system80that80uses80an80approved80distribution80pipe80surrounded80by80
gravel80or80other80approved80aggregate80material
Setback80for80Wells80and80Springs80-80ans--
✔✔50'80from80tank80and80100'80from80absorption80field
Setback80for80Property80Lines80-80ans--
✔✔10'80from80tank80and805'80from80absorption80field.8050'80from80adjacent80property80lin
es
Setback80for80Bodies80of80Water80or80Impoundments80-80ans--
✔✔25'80from80tank80and8050'80from80absorption80field
Setback80for80Streams80or80Tributaries80-80ans--
✔✔25'80from80tank80and8050'80from80absorption80field
Setback80for80Ponded80Wetlands80-80ans--✔✔50'80from80absorption80fields
Setback80for80Building80w/80Basement80-80ans--✔✔10'80from80foundation
Setback80for80Building80w/out80Basement80-80ans--
✔✔Absorption80field805'80from80foundation80and80tank8010'
Setback80for80Surface80Drainage80Ditch80-80ans--✔✔Tank8015'80from80drainage80ditch.
Setback80for80Subsurface80Drainage80-80ans--
✔✔10'80upgrade80or8030'80downgrade80from80absorption80line
Setback80for80Water80Supply80Lines80-80ans--
✔✔If80within8010'80of80absorption80field,80water80supply80line80shall80be80at80least8012"80
above80the80top80of80aggregate80layer
First80Component80of80on-site80sewage80management80system80-80ans--
✔✔Septic80Tank
Minimum80Septic80Capacity80for801-480bedrooms80-80ans--✔✔1,000
Septic80Capcity80increases80by80how80much80per80each80additional80bedroom80over804?
80-80ans--✔✔250
How80much80should80tank80increase80with80garbage80disposal?80-80ans--✔✔50%
, Primary80Purpose80of80Septic80Tank80-80ans--
✔✔Settling80out80of80solid80matter80from80liquid
Which80is80higher80-80Outlet80or80Inlet?80-80ans--✔✔Inlet
How80many80inches80difference80between80outlet80and80inlet?80-80ans--✔✔2
How80should80a80properly80installed80septic80tank80be80placed?80-80ans--
✔✔Level,80on80undisturbed80earth,80and80constructed80to80prevent80surface80water80fro
m80entering80the80tank
When80is80a80riser80required?80-80ans--
✔✔If80more80than801280inches80of80cover80is80to80be80placed80over80the80tank
What80must80be80installed80on80the80outlet80end80of80the80tank?80-80ans--
✔✔An80approved80filter
When80is80a80grease80trap80required?80-80ans--
✔✔When80grease80exceeding805080milligrams80per80liter80may80be80introduced80into80a8
0system
Where80is80effluent80from80grease80trap80deposited?80-80ans--
✔✔The80tank80and80not80the80absorption80field
When80are80pump80systems80necessary?80-80ans--
✔✔If80gravity80flow80is80not80possible80to80access80the80desired80absorption80field80for80
any80type80of80system
What80type80of80pumps80must80be80used?80-80ans--
✔✔Submersible80and80wastewater80approved
What80must80pumps80be80capable80of80delivering?80-80ans--
✔✔Flow80at80designed80total80dynamic80head
Where80should80pumps80not80be80placed?80-80ans--✔✔Inside80the80primary80tank
Dosing80Tank80Volume80-80ans--
✔✔Needs80to80have80sufficient80volume80to80provide80desired80dosing80volume80plus80r
eserve80volume.
Reserve80volume80-80ans--✔✔Estimated80daily80wastewater80flow
What80is80an80aggregate80system80-80ans--
✔✔Approved80system80that80uses80an80approved80distribution80pipe80surrounded80by80
gravel80or80other80approved80aggregate80material
