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TEXAS ON-SITE SEWAGE FACILITY (OSSF) MAINTENANCE
PROVIDER LICENSING Exam 2026-2027 BANK QUESTIONS
WITH DETAILED VERIFIED ANSWERS EXAM QUESTIONS
WILL COME FROM HERE (100% Latest Already Graded A+
Question 1
A homeowner reports sewage surfacing in the yard near the disposal
area of a conventional septic system. As a licensed OSSF Maintenance
Provider, what is your FIRST required action?
A. Immediately replace the drainfield
B. Inspect the septic tank for solids accumulation and outlet obstruction
C. Apply chemical additives to break down sludge
D. Recommend abandoning the system
Correct Answer: B
Explanation: Surfacing effluent most commonly results from hydraulic
failure or solids carryover. TAC 285 requires maintenance providers to
evaluate tank condition and flow path first before recommending major
repairs or replacement. Chemical additives are not approved corrective
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actions. The systematic approach to troubleshooting requires
identifying the root cause before undertaking costly or invasive
solutions .
Question 2
During a routine inspection of an aerobic treatment unit (ATU), the
chlorine tablet tube is empty. What is the most appropriate action?
A. Document and leave it empty until the next visit
B. Add liquid bleach directly to the pump tank
C. Replace tablets with NSF-approved chlorine tablets
D. Disable the system until the homeowner refills it
Correct Answer: C
Explanation: Disinfection is mandatory for ATUs. Only NSF-approved
chlorine tablets are allowed. Liquid bleach is prohibited due to dosing
inconsistency and potential system damage. Maintaining proper
disinfection is critical for protecting public health when effluent is
discharged to the surface .
Question 3
Which component failure in an ATU presents the GREATEST immediate
public health risk?
A. Aerator malfunction
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B. High-water alarm failure
C. Clarifier baffle damage
D. Disinfection unit failure
Correct Answer: D
Explanation: Failure of the disinfection unit allows pathogen-laden
effluent to be discharged to the surface, creating a direct exposure risk,
which is prioritized under TAC enforcement standards. While all
component failures are significant, disinfection failure presents the most
immediate health hazard .
Question 4
A maintenance provider observes thick scum and sludge layers
exceeding allowable limits in a septic tank. What is the correct
recommendation?
A. Increase water usage to flush solids
B. Add biological enzymes
C. Schedule tank pumping by a licensed pumper
D. Install a second tank immediately
Correct Answer: C
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Explanation: When sludge and scum accumulation exceeds allowable
limits, the only appropriate corrective action is to have the tank pumped
by a licensed pumper. Additives are not approved corrective measures,
and increasing water usage would worsen the problem by hydraulically
overloading the system .
Question 5
Which Texas regulation contains the primary rules governing OSSFs?
A. Texas Health and Safety Code Chapter 366
B. 30 TAC Chapter 285
C. 16 TAC Chapter 100
D. 40 TAC Chapter 101
Correct Answer: B
Explanation: Title 30 Texas Administrative Code (TAC), Chapter 285
contains the rules for OSSFs. Texas Health and Safety Code Chapter 366
is the State law that governs the OSSF permitting program, but the
specific rules are found in 30 TAC Chapter 285 .
Question 6
Under Texas law, what is the minimum required inspection frequency
for an aerobic treatment unit (ATU) with surface spray irrigation?
A. Annually
TEXAS ON-SITE SEWAGE FACILITY (OSSF) MAINTENANCE
PROVIDER LICENSING Exam 2026-2027 BANK QUESTIONS
WITH DETAILED VERIFIED ANSWERS EXAM QUESTIONS
WILL COME FROM HERE (100% Latest Already Graded A+
Question 1
A homeowner reports sewage surfacing in the yard near the disposal
area of a conventional septic system. As a licensed OSSF Maintenance
Provider, what is your FIRST required action?
A. Immediately replace the drainfield
B. Inspect the septic tank for solids accumulation and outlet obstruction
C. Apply chemical additives to break down sludge
D. Recommend abandoning the system
Correct Answer: B
Explanation: Surfacing effluent most commonly results from hydraulic
failure or solids carryover. TAC 285 requires maintenance providers to
evaluate tank condition and flow path first before recommending major
repairs or replacement. Chemical additives are not approved corrective
,2|Page
actions. The systematic approach to troubleshooting requires
identifying the root cause before undertaking costly or invasive
solutions .
Question 2
During a routine inspection of an aerobic treatment unit (ATU), the
chlorine tablet tube is empty. What is the most appropriate action?
A. Document and leave it empty until the next visit
B. Add liquid bleach directly to the pump tank
C. Replace tablets with NSF-approved chlorine tablets
D. Disable the system until the homeowner refills it
Correct Answer: C
Explanation: Disinfection is mandatory for ATUs. Only NSF-approved
chlorine tablets are allowed. Liquid bleach is prohibited due to dosing
inconsistency and potential system damage. Maintaining proper
disinfection is critical for protecting public health when effluent is
discharged to the surface .
Question 3
Which component failure in an ATU presents the GREATEST immediate
public health risk?
A. Aerator malfunction
,3|Page
B. High-water alarm failure
C. Clarifier baffle damage
D. Disinfection unit failure
Correct Answer: D
Explanation: Failure of the disinfection unit allows pathogen-laden
effluent to be discharged to the surface, creating a direct exposure risk,
which is prioritized under TAC enforcement standards. While all
component failures are significant, disinfection failure presents the most
immediate health hazard .
Question 4
A maintenance provider observes thick scum and sludge layers
exceeding allowable limits in a septic tank. What is the correct
recommendation?
A. Increase water usage to flush solids
B. Add biological enzymes
C. Schedule tank pumping by a licensed pumper
D. Install a second tank immediately
Correct Answer: C
, 4|Page
Explanation: When sludge and scum accumulation exceeds allowable
limits, the only appropriate corrective action is to have the tank pumped
by a licensed pumper. Additives are not approved corrective measures,
and increasing water usage would worsen the problem by hydraulically
overloading the system .
Question 5
Which Texas regulation contains the primary rules governing OSSFs?
A. Texas Health and Safety Code Chapter 366
B. 30 TAC Chapter 285
C. 16 TAC Chapter 100
D. 40 TAC Chapter 101
Correct Answer: B
Explanation: Title 30 Texas Administrative Code (TAC), Chapter 285
contains the rules for OSSFs. Texas Health and Safety Code Chapter 366
is the State law that governs the OSSF permitting program, but the
specific rules are found in 30 TAC Chapter 285 .
Question 6
Under Texas law, what is the minimum required inspection frequency
for an aerobic treatment unit (ATU) with surface spray irrigation?
A. Annually
