COMMERCIAL SEPTIC SYSTEM
INSTALLER GRADE A+ COMPLETE
EXAM QUESTIONS AND 100% VERIFIED
ANSWERS (2026/2027) PASS
GUARANTEE
Allmtanksmmustmhave:m-mCORRECTmANSWER2mcompartments
Allmtanksmwhethermpre-
manufacturedmormconstructedmonmsitemshallmbemconstructedmsomthatmthemlengthmism___________m
comparedmtomthemwidth.m-mCORRECTmANSWERatmleastmonemandmone-
mhalfm(1m1/2)mtimes...m"tomthemwidth."
SepticmTanksmmaymbemmademof:m-
mCORRECTmANSWERConcrete,mPlastic,mfiberglass,mormothermmaterialsmasmapprovedmbymthemdepart
ment.
Tankmcompartmentmpartitionsmwillmbemlocated:m-mCORRECTmANSWERNotmlessmthanmtwo-
thirdsmormmoremthanmthree-fourthsmthemLengthmofmthemtankmfrommthemInletmend.
Compartmentmpartitionsmwillmbemconstructedmsomampass-
thrumholemormslotmequalmtomormgreatermthanmthemdiametermofmtheminletmpipemismpositionedmbelowm
themliquidmsurfacemwithmam_____________________________.m-
mCORRECTmANSWERMinimumm25%mtomammaximummofm50%mofmthemtotalmliquidmdepth.
Totalmliquidmdepthmformlargermpoured-in-
placemtanksmshallmhavemammaximummofm______________inchesm-mCORRECTmANSWER66minches
TruemormFalse:mWallsmandmbottommofmpoured-in-placemsepticmtanksmmustmbemreinforced.m-
mCORRECTmANSWERTrue
, HowmcanmamSepticmtankmbemreinforced?m-
mCORRECTmANSWERsixminchmbym6minchm(6"x6")mNo.10mgagemweldedmsteelmreinforcingmwiremORmfib
rousmreinforcingmmaterialmconformingmtomASTMmspecificationsmformsuchmmaterials.
HowmmustmTankmLidsmbemReinforced?m-mCORRECTmANSWERusingmthree-
eightsmsteelmreinforcingmrodsm(rebar)mwhichmshallmbemspacedmtwelveminchesm(12")monmcentermeac
hmwaymextendingmamminimummofmtwomandmonemhalfm(2m1/2")minchesmandmammaximummofmthreem(3
")mfrommthemoutsidemedgemofmthemtankmlid.
Inmgeneral,mthemtankmmustmbemablemtomwithstandmamuniformmlivemloadmofm___________________
___mpoundsmpermsquaremfootminmadditionmtomallmloadsmtomwhichmanmundergroundmtankmismnormall
ymsubjected.m-mCORRECTmANSWER150
TruemormFalse:mWalls,mbottoms,mandmlidsmofmpoured-in-
placemsepticmtanksmshouldmhavemamminimummthicknessmofmfourminchesm(4").m-
mCORRECTmANSWERTrue
Tankmlidsmshallmbemconstructedminm______________________mpiecesmandmshallmhavemsecurable,m
removablemaccessmopeningsmlocatedmsomthatmtheminletmandmoutletmteesmcanmbem______________
__________________.m-mCORRECTmANSWERonemormtwo,m
readilymaccessed.
Accessmopeningmshallmhavemamminimummofm_________________mandmmaximummofm__________
_________mfreemspace.m-mCORRECTmANSWERMinimum:m15"
Maximum:m24"
Tanksmwithmmoremthanm12minchesmofmcovermmustmextendmaccessmopeningsmtomwithinm______minch
esmofmthemgroundmsurface.m-mCORRECTmANSWER12
INSTALLER GRADE A+ COMPLETE
EXAM QUESTIONS AND 100% VERIFIED
ANSWERS (2026/2027) PASS
GUARANTEE
Allmtanksmmustmhave:m-mCORRECTmANSWER2mcompartments
Allmtanksmwhethermpre-
manufacturedmormconstructedmonmsitemshallmbemconstructedmsomthatmthemlengthmism___________m
comparedmtomthemwidth.m-mCORRECTmANSWERatmleastmonemandmone-
mhalfm(1m1/2)mtimes...m"tomthemwidth."
SepticmTanksmmaymbemmademof:m-
mCORRECTmANSWERConcrete,mPlastic,mfiberglass,mormothermmaterialsmasmapprovedmbymthemdepart
ment.
Tankmcompartmentmpartitionsmwillmbemlocated:m-mCORRECTmANSWERNotmlessmthanmtwo-
thirdsmormmoremthanmthree-fourthsmthemLengthmofmthemtankmfrommthemInletmend.
Compartmentmpartitionsmwillmbemconstructedmsomampass-
thrumholemormslotmequalmtomormgreatermthanmthemdiametermofmtheminletmpipemismpositionedmbelowm
themliquidmsurfacemwithmam_____________________________.m-
mCORRECTmANSWERMinimumm25%mtomammaximummofm50%mofmthemtotalmliquidmdepth.
Totalmliquidmdepthmformlargermpoured-in-
placemtanksmshallmhavemammaximummofm______________inchesm-mCORRECTmANSWER66minches
TruemormFalse:mWallsmandmbottommofmpoured-in-placemsepticmtanksmmustmbemreinforced.m-
mCORRECTmANSWERTrue
, HowmcanmamSepticmtankmbemreinforced?m-
mCORRECTmANSWERsixminchmbym6minchm(6"x6")mNo.10mgagemweldedmsteelmreinforcingmwiremORmfib
rousmreinforcingmmaterialmconformingmtomASTMmspecificationsmformsuchmmaterials.
HowmmustmTankmLidsmbemReinforced?m-mCORRECTmANSWERusingmthree-
eightsmsteelmreinforcingmrodsm(rebar)mwhichmshallmbemspacedmtwelveminchesm(12")monmcentermeac
hmwaymextendingmamminimummofmtwomandmonemhalfm(2m1/2")minchesmandmammaximummofmthreem(3
")mfrommthemoutsidemedgemofmthemtankmlid.
Inmgeneral,mthemtankmmustmbemablemtomwithstandmamuniformmlivemloadmofm___________________
___mpoundsmpermsquaremfootminmadditionmtomallmloadsmtomwhichmanmundergroundmtankmismnormall
ymsubjected.m-mCORRECTmANSWER150
TruemormFalse:mWalls,mbottoms,mandmlidsmofmpoured-in-
placemsepticmtanksmshouldmhavemamminimummthicknessmofmfourminchesm(4").m-
mCORRECTmANSWERTrue
Tankmlidsmshallmbemconstructedminm______________________mpiecesmandmshallmhavemsecurable,m
removablemaccessmopeningsmlocatedmsomthatmtheminletmandmoutletmteesmcanmbem______________
__________________.m-mCORRECTmANSWERonemormtwo,m
readilymaccessed.
Accessmopeningmshallmhavemamminimummofm_________________mandmmaximummofm__________
_________mfreemspace.m-mCORRECTmANSWERMinimum:m15"
Maximum:m24"
Tanksmwithmmoremthanm12minchesmofmcovermmustmextendmaccessmopeningsmtomwithinm______minch
esmofmthemgroundmsurface.m-mCORRECTmANSWER12