OSSF INSTALLER 1 TEST PAPER EXAM 2025/2026
QUESTIONS AND ANSWERS GRADED A++
✔✔Maintenance - ✔✔Maintenance does not include alterations
✔✔Maintenance provider - ✔✔Through August 31, 2009, a maintenance company is a
person or business that maintains on-site sewage facilities for compensation
✔✔Malfunctioning OSSF - ✔✔on-site sewage facility that is causing a nuisance or is not
operating in compliance
✔✔On-site sewage disposal system - ✔✔does not treat more than 5,000 gallons per
day, only used for disposal of sewage from site.
✔✔Professional engineer - ✔✔Texas Board of Professional Engineers to engage in the
practice of engineering in the State of Texas
✔✔Professional sanitarian - ✔✔individual registered by the Texas Department of State
Health Services to carry out educational and inspection duties in the field of sanitation
✔✔Recharge feature - ✔✔Permeable geologic or manmade feature located on the
Edwards Aquifer Recharge Zone, hydrologic interconnectedness and rapid infiltration
can occur
✔✔Sewage - ✔✔is primarily organic and biodegradable or decomposable, and
originates as human, animal, or plant waste
✔✔Site evaluator - ✔✔conducts preconstruction site evaluations, performs soil analysis,
a site survey, or other activities necessary to determine the suitability of a site for OSSF
✔✔Can a professional engineer perform sit evaluation without SE license - ✔✔Yes
✔✔What is a well - ✔✔defined under Texas Water Code, Chapters 26, 32, and 33, and
16 TAC Chapter 76
✔✔How often does an install renew their registration - ✔✔every 3 years
✔✔Types of penalties for violating OSSF regulations - ✔✔injunction, civil or criminal
✔✔Health and Safety Code, Chapter 366 - ✔✔Updated February 7, 2017
✔✔On-Site Sewage Facilities, Title 30, TAC Chapter 285 - ✔✔Effective December 29,
2016
, ✔✔Occupational Licenses and Registrations, Title 30, TAC Chapter 30, Subchapters A
and G - ✔✔Effective September 29, 2016
✔✔Major steps in permitting process - ✔✔Site/soil evaluation
Select OSSF system
System planning
Submit for permit
Review permit application
Authorization to construct issued
Construction
Inspection
Notice of approval
✔✔What types of criminal offenses are related to OSSF - ✔✔misdemeanor in
accordance with Chap 7 Texas Water Code and Chapter 12.23 of Texas Penal Code
✔✔Max allowable slope for less than 20 ft - ✔✔Stable Rock (Vertical)90*
Type A (3/4:1) 53*
Type B (1:1) 45*
Type C (1.5:1) 34*
✔✔What is not an effective way to warn traffic about construction - ✔✔Anything that
doesn't catch attention, like construction equipment. Must have movement by a person
or flashing lights
✔✔What are 4 safety concerns when channeling traffic thru a work area - ✔✔pre warn,
sign properly, regulate speed, guide properly
✔✔What is the angle of repose - ✔✔an angle closest to perpendicular at which the soil
remains at rest
✔✔how far ahead must someone call Texas One Call before digging with mechanical
equipment - ✔✔2 working days excluding weekend and holiday
✔✔Three types of infection risk - ✔✔hep A, leptospirosis and parasites
✔✔Dangers of confined space rescues - ✔✔Almost 60% of fatalities involved would be
rescuers
✔✔Cubic feet to Cubic Yards - ✔✔divide by 27
✔✔Gallons to Cubic Feet - ✔✔divide by 7.48
✔✔Gallons per minute to Gallons per day - ✔✔multiple by 1,440
QUESTIONS AND ANSWERS GRADED A++
✔✔Maintenance - ✔✔Maintenance does not include alterations
✔✔Maintenance provider - ✔✔Through August 31, 2009, a maintenance company is a
person or business that maintains on-site sewage facilities for compensation
✔✔Malfunctioning OSSF - ✔✔on-site sewage facility that is causing a nuisance or is not
operating in compliance
✔✔On-site sewage disposal system - ✔✔does not treat more than 5,000 gallons per
day, only used for disposal of sewage from site.
✔✔Professional engineer - ✔✔Texas Board of Professional Engineers to engage in the
practice of engineering in the State of Texas
✔✔Professional sanitarian - ✔✔individual registered by the Texas Department of State
Health Services to carry out educational and inspection duties in the field of sanitation
✔✔Recharge feature - ✔✔Permeable geologic or manmade feature located on the
Edwards Aquifer Recharge Zone, hydrologic interconnectedness and rapid infiltration
can occur
✔✔Sewage - ✔✔is primarily organic and biodegradable or decomposable, and
originates as human, animal, or plant waste
✔✔Site evaluator - ✔✔conducts preconstruction site evaluations, performs soil analysis,
a site survey, or other activities necessary to determine the suitability of a site for OSSF
✔✔Can a professional engineer perform sit evaluation without SE license - ✔✔Yes
✔✔What is a well - ✔✔defined under Texas Water Code, Chapters 26, 32, and 33, and
16 TAC Chapter 76
✔✔How often does an install renew their registration - ✔✔every 3 years
✔✔Types of penalties for violating OSSF regulations - ✔✔injunction, civil or criminal
✔✔Health and Safety Code, Chapter 366 - ✔✔Updated February 7, 2017
✔✔On-Site Sewage Facilities, Title 30, TAC Chapter 285 - ✔✔Effective December 29,
2016
, ✔✔Occupational Licenses and Registrations, Title 30, TAC Chapter 30, Subchapters A
and G - ✔✔Effective September 29, 2016
✔✔Major steps in permitting process - ✔✔Site/soil evaluation
Select OSSF system
System planning
Submit for permit
Review permit application
Authorization to construct issued
Construction
Inspection
Notice of approval
✔✔What types of criminal offenses are related to OSSF - ✔✔misdemeanor in
accordance with Chap 7 Texas Water Code and Chapter 12.23 of Texas Penal Code
✔✔Max allowable slope for less than 20 ft - ✔✔Stable Rock (Vertical)90*
Type A (3/4:1) 53*
Type B (1:1) 45*
Type C (1.5:1) 34*
✔✔What is not an effective way to warn traffic about construction - ✔✔Anything that
doesn't catch attention, like construction equipment. Must have movement by a person
or flashing lights
✔✔What are 4 safety concerns when channeling traffic thru a work area - ✔✔pre warn,
sign properly, regulate speed, guide properly
✔✔What is the angle of repose - ✔✔an angle closest to perpendicular at which the soil
remains at rest
✔✔how far ahead must someone call Texas One Call before digging with mechanical
equipment - ✔✔2 working days excluding weekend and holiday
✔✔Three types of infection risk - ✔✔hep A, leptospirosis and parasites
✔✔Dangers of confined space rescues - ✔✔Almost 60% of fatalities involved would be
rescuers
✔✔Cubic feet to Cubic Yards - ✔✔divide by 27
✔✔Gallons to Cubic Feet - ✔✔divide by 7.48
✔✔Gallons per minute to Gallons per day - ✔✔multiple by 1,440
