OSSF INSTALLER 1 LICENSE EXAM LATEST UPDATE 2026

OSSF INSTALLER 1 LICENSE EXAM
LATEST UPDATE 2026

What are the three primary routes of
contamination for pathogenic microorganisms
and harmful chemicals from on-site sewage
systems to our environment? - answer-
Neighborhood pollution
Groundwater contamination
Surface water pollution


In the hydrologic cycle, water moves by
evaporation and transpiration into the - answer-
Atmosphere


evaporation where it comes in contact - answer-


Ground Water - answer-The term refers to
water that collects beneath the surface of the

, earth in porous, permeable, water-bearing
geologic formations or aquifers.


Surface water - answer-refers to water that is
found above ground in containment areas, such
as lakes, rivers, streams, creeks, and
reservoirs.


Water table aquifers are recharged by - answer-
Local percolation


Sepage pits - answer-


sepage pits - answer-Rock-filled or lined pits
dug at least 4 feet deep at the end of a septic
tank absorption field system are called


Cess pools - answer-Pits constructed in
permeable soil with open-jointed material along