OSSF Designated Representative | EXAM QUESTIONS AND
VERIFIED ANSWERS (100%VERIFIED) GUARANTEED
SUCCESS | GRADE A+ | LATEST UPDATE 2026/2027.
What is the principle factor determining the survival of bacteria in the
soil?
Ans: Moisture. Temperature, pH, and the availability of organic matter
are other factors
Where does Adsorption occur best?
Ans: In water with high hardness and neutral or slightly acidic pH.
This is the most important mechanism for removing viruses.
What concentration does Nitrogen occur in domestic wastewater?
Ans: 20 to 80 mg/L
How is Nitrogen removed from wastewater?
Ans: vegetation uptake and denitrification (both biological)
30 TAC Chapter 285
Ans: This chapter establishes minimum standards for planning
materials, construction, installation, alteration, repair, extension,
operation, maintenance, permitting, and inspection of OSSFs. This
,chapter also provides the procedures for the designation of local
governmental entities as authorized agents.
30 TAC Chapter 30
Ans: The licensing of installers, designated representatives, and site
evaluators and the registration of apprentices is included in this chapter.
September 1989
Ans: The year in which statewide regulation of OSSFs began
OSSF minimum requirements
Ans: 1) produce no more than 5,000 g of waste daily
2) waste must originate and be disposed of on site
3) wastewater must be disposed in soil or as vapor
1990
Ans: The requirement for installers to be licensed went into effect
1998
,Ans: The requirement for Installer II and DR to be licensed went into
effect
Title 5, Chapter 366 Texas Health and Safety Code
Ans: The Texas statute establishing OSSF regulations and regulators.
2002
Ans: The requirement for SE to be licensed went into effect 2009
Ans: The requirement for MP to be licensed went into effect
Installer II extra requirements
Ans: - one year as Installer I and 3 installations w/notarized
statements
- or two years as apprentice with six installations w/notarized
statements
SE extra requirements
Ans: must have previous license of one:
Installer II
DR
PE
, RS
Professional Geoscientist
Maintenance Technician and Apprentice note
Ans: Only license that doesn't require exam, Apprentice does not
require class either
3 years, 24 hours
Ans: OSSF licenses are issued for a term of ____ years and require
____ hours for renewal
Daily
Ans: How often must an installer check an apprentice's work?
Ten Acre Rule
Ans: An OSSF for a single-family residence on a 10 acre lot or more
with disposal lines at least 100ft from property line are not required to
apply for a permit for a new construction.
Permit Processing Steps
Ans: 1) Site Evaluation w/ written report
2) Selection of OSSF based on Site Evaluation
VERIFIED ANSWERS (100%VERIFIED) GUARANTEED
SUCCESS | GRADE A+ | LATEST UPDATE 2026/2027.
What is the principle factor determining the survival of bacteria in the
soil?
Ans: Moisture. Temperature, pH, and the availability of organic matter
are other factors
Where does Adsorption occur best?
Ans: In water with high hardness and neutral or slightly acidic pH.
This is the most important mechanism for removing viruses.
What concentration does Nitrogen occur in domestic wastewater?
Ans: 20 to 80 mg/L
How is Nitrogen removed from wastewater?
Ans: vegetation uptake and denitrification (both biological)
30 TAC Chapter 285
Ans: This chapter establishes minimum standards for planning
materials, construction, installation, alteration, repair, extension,
operation, maintenance, permitting, and inspection of OSSFs. This
,chapter also provides the procedures for the designation of local
governmental entities as authorized agents.
30 TAC Chapter 30
Ans: The licensing of installers, designated representatives, and site
evaluators and the registration of apprentices is included in this chapter.
September 1989
Ans: The year in which statewide regulation of OSSFs began
OSSF minimum requirements
Ans: 1) produce no more than 5,000 g of waste daily
2) waste must originate and be disposed of on site
3) wastewater must be disposed in soil or as vapor
1990
Ans: The requirement for installers to be licensed went into effect
1998
,Ans: The requirement for Installer II and DR to be licensed went into
effect
Title 5, Chapter 366 Texas Health and Safety Code
Ans: The Texas statute establishing OSSF regulations and regulators.
2002
Ans: The requirement for SE to be licensed went into effect 2009
Ans: The requirement for MP to be licensed went into effect
Installer II extra requirements
Ans: - one year as Installer I and 3 installations w/notarized
statements
- or two years as apprentice with six installations w/notarized
statements
SE extra requirements
Ans: must have previous license of one:
Installer II
DR
PE
, RS
Professional Geoscientist
Maintenance Technician and Apprentice note
Ans: Only license that doesn't require exam, Apprentice does not
require class either
3 years, 24 hours
Ans: OSSF licenses are issued for a term of ____ years and require
____ hours for renewal
Daily
Ans: How often must an installer check an apprentice's work?
Ten Acre Rule
Ans: An OSSF for a single-family residence on a 10 acre lot or more
with disposal lines at least 100ft from property line are not required to
apply for a permit for a new construction.
Permit Processing Steps
Ans: 1) Site Evaluation w/ written report
2) Selection of OSSF based on Site Evaluation
