Texas OSSF Installer II
TEXAS OSSF INSTALLER II | VERIFIED ANSWERS AND QUESTIONS -
MOST RECENT EDITION 2026/2027
TEXAS OSSF INSTALLER II
Certification
1. Which state agency has primary regulatory authority over On-Site
Sewage Facilities (OSSF) in Texas?
A. Texas Department of State Health Services
B. Texas Department of Licensing and Regulation
C. Texas Water Development Board
D. Texas Commission on Environmental Quality (TCEQ)
ANSWER : D
2. OSSF rules in Texas are codified under which title of the Texas
Administrative Code?
A. 30 TAC Chapter 285
B. 30 TAC Chapter 217
C. 25 TAC Chapter 290
D. 16 TAC Chapter 302
ANSWER : A
3. An Installer II license authorizes the holder to install which type of
OSSF systems?
A. Only standard subsurface drainfield systems
B. Both standard and aerobic/alternative systems
C. Only aerobic treatment units
D. Only systems requiring a maintenance contract
ANSWER : B
4. An Installer I license is generally limited to installing which type of
system?
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, Texas OSSF Installer II
A. Drip irrigation systems only
B. Standard (non-aerobic) subsurface disposal systems
C. Any OSSF regardless of complexity
D. Aerobic treatment units with spray distribution
ANSWER : B
5. Who is legally responsible for obtaining a construction permit before
installing an OSSF?
A. Only the site evaluator
B. Only the installer
C. The property owner (or their authorized agent, including the installer)
D. The local health department automatically
ANSWER : C
6. An OSSF permit application must generally be reviewed by the
permitting authority within how many days of a complete submission?
A. 30 days
B. 90 days
C. 10 days
D. 5 days
ANSWER : A
7. Which document must an installer provide to the permitting
authority before beginning construction of a permitted OSSF?
A. A signed maintenance company contract only
B. A certified copy of the property deed
C. Proof of a valid, current OSSF installer license
D. A soil scientist's continuing education transcript
ANSWER : C
8. What is the primary purpose of an authorization to construct
(permit) under 30 TAC Chapter 285?
A. To confirm the planning materials meet minimum site and system
requirements before installation begins
B. To register the septic tank manufacturer with the state
C. To waive setback distance requirements
D. To certify the installer's annual continuing education hours
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, Texas OSSF Installer II
ANSWER : A
9. Under TCEQ rules, who may prepare planning materials (design) for
a standard OSSF?
A. Only the property owner
B. Only a professional engineer
C. A licensed installer, professional engineer, or registered sanitarian,
depending on system type and local requirements
D. Only the manufacturer of the treatment unit
ANSWER : C
10. What must occur before an installer covers or backfills an OSSF
system?
A. A 30-day waiting period
B. Payment of the final utility bill
C. An inspection and approval by the permitting authority (unless
properly waived)
D. Notification to the state legislature
ANSWER : C
11. Which of the following is grounds for suspension or revocation of
an OSSF installer's license?
A. Installing a system ahead of the scheduled date
B. Taking more than the minimum required continuing education
C. Installing a system that violates state rules or local order requirements
D. Using a subcontractor who is also licensed
ANSWER : C
12. How often must an OSSF installer generally renew their license in
Texas?
A. Licenses do not expire
B. Every two years
C. Every year
D. Every five years
ANSWER : B
13. What is the minimum continuing education requirement typically
associated with OSSF installer license renewal?
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, Texas OSSF Installer II
A. A set number of TCEQ-approved training hours within the renewal
period
B. A full re-examination every renewal cycle
C. Only a background check
D. No continuing education is required
ANSWER : A
14. Local governments (counties or districts) that adopt OSSF rules
stricter than the state minimum must do so under what authority?
A. Unilateral county authority with no state approval needed
B. City council resolution alone, regardless of county rules
C. Commission-approved order adopted under Texas Health and Safety
Code Chapter 366
D. Federal EPA delegation only
ANSWER : C
15. What happens if an installer installs an OSSF without a valid permit
having been issued?
A. Nothing, as long as the system functions properly
B. The homeowner alone bears all liability
C. The installer may face enforcement action, and the system installation
is considered a rule violation
D. The system is automatically permitted retroactively
ANSWER : C
16. Which entity typically issues the OSSF installer license itself, even
though a local permitting authority processes individual permits?
A. The Texas Real Estate Commission
B. TCEQ
C. The county tax assessor
D. The local water utility
ANSWER : B
17. An Authorized Agent under 30 TAC Chapter 285 refers to which of
the following?
A. Any licensed plumber
Page 4 of 48
TEXAS OSSF INSTALLER II | VERIFIED ANSWERS AND QUESTIONS -
MOST RECENT EDITION 2026/2027
TEXAS OSSF INSTALLER II
Certification
1. Which state agency has primary regulatory authority over On-Site
Sewage Facilities (OSSF) in Texas?
A. Texas Department of State Health Services
B. Texas Department of Licensing and Regulation
C. Texas Water Development Board
D. Texas Commission on Environmental Quality (TCEQ)
ANSWER : D
2. OSSF rules in Texas are codified under which title of the Texas
Administrative Code?
A. 30 TAC Chapter 285
B. 30 TAC Chapter 217
C. 25 TAC Chapter 290
D. 16 TAC Chapter 302
ANSWER : A
3. An Installer II license authorizes the holder to install which type of
OSSF systems?
A. Only standard subsurface drainfield systems
B. Both standard and aerobic/alternative systems
C. Only aerobic treatment units
D. Only systems requiring a maintenance contract
ANSWER : B
4. An Installer I license is generally limited to installing which type of
system?
Page 1 of 48
, Texas OSSF Installer II
A. Drip irrigation systems only
B. Standard (non-aerobic) subsurface disposal systems
C. Any OSSF regardless of complexity
D. Aerobic treatment units with spray distribution
ANSWER : B
5. Who is legally responsible for obtaining a construction permit before
installing an OSSF?
A. Only the site evaluator
B. Only the installer
C. The property owner (or their authorized agent, including the installer)
D. The local health department automatically
ANSWER : C
6. An OSSF permit application must generally be reviewed by the
permitting authority within how many days of a complete submission?
A. 30 days
B. 90 days
C. 10 days
D. 5 days
ANSWER : A
7. Which document must an installer provide to the permitting
authority before beginning construction of a permitted OSSF?
A. A signed maintenance company contract only
B. A certified copy of the property deed
C. Proof of a valid, current OSSF installer license
D. A soil scientist's continuing education transcript
ANSWER : C
8. What is the primary purpose of an authorization to construct
(permit) under 30 TAC Chapter 285?
A. To confirm the planning materials meet minimum site and system
requirements before installation begins
B. To register the septic tank manufacturer with the state
C. To waive setback distance requirements
D. To certify the installer's annual continuing education hours
Page 2 of 48
, Texas OSSF Installer II
ANSWER : A
9. Under TCEQ rules, who may prepare planning materials (design) for
a standard OSSF?
A. Only the property owner
B. Only a professional engineer
C. A licensed installer, professional engineer, or registered sanitarian,
depending on system type and local requirements
D. Only the manufacturer of the treatment unit
ANSWER : C
10. What must occur before an installer covers or backfills an OSSF
system?
A. A 30-day waiting period
B. Payment of the final utility bill
C. An inspection and approval by the permitting authority (unless
properly waived)
D. Notification to the state legislature
ANSWER : C
11. Which of the following is grounds for suspension or revocation of
an OSSF installer's license?
A. Installing a system ahead of the scheduled date
B. Taking more than the minimum required continuing education
C. Installing a system that violates state rules or local order requirements
D. Using a subcontractor who is also licensed
ANSWER : C
12. How often must an OSSF installer generally renew their license in
Texas?
A. Licenses do not expire
B. Every two years
C. Every year
D. Every five years
ANSWER : B
13. What is the minimum continuing education requirement typically
associated with OSSF installer license renewal?
Page 3 of 48
, Texas OSSF Installer II
A. A set number of TCEQ-approved training hours within the renewal
period
B. A full re-examination every renewal cycle
C. Only a background check
D. No continuing education is required
ANSWER : A
14. Local governments (counties or districts) that adopt OSSF rules
stricter than the state minimum must do so under what authority?
A. Unilateral county authority with no state approval needed
B. City council resolution alone, regardless of county rules
C. Commission-approved order adopted under Texas Health and Safety
Code Chapter 366
D. Federal EPA delegation only
ANSWER : C
15. What happens if an installer installs an OSSF without a valid permit
having been issued?
A. Nothing, as long as the system functions properly
B. The homeowner alone bears all liability
C. The installer may face enforcement action, and the system installation
is considered a rule violation
D. The system is automatically permitted retroactively
ANSWER : C
16. Which entity typically issues the OSSF installer license itself, even
though a local permitting authority processes individual permits?
A. The Texas Real Estate Commission
B. TCEQ
C. The county tax assessor
D. The local water utility
ANSWER : B
17. An Authorized Agent under 30 TAC Chapter 285 refers to which of
the following?
A. Any licensed plumber
Page 4 of 48
