Texas OSSF Site Evaluator Exam Study Guide | Complete Practice
Exam Questions with Correct Answers and Detailed Rationales
100% Verified | Latest Update 2026/2027 | Already Graded A+
Question 1. What is the primary purpose of a preconstruction site evaluation?
A. Determine whether the site is suitable for an OSSF
B. Determine the property's market value
C. Determine the homeowner's tax rate
D. Select the home's electrical contractor
Correct Answer: A. Determine whether the site is suitable for an OSSF
Rationale: The site evaluation establishes the physical and environmental
conditions necessary to determine whether an OSSF can function properly at
the proposed location. It also provides information used to select an
appropriate treatment and disposal method.
Question 2. Which professional credential is specifically relevant to soil
science qualification for Site Evaluator licensing?
A. Certified Professional Soil Scientist
B. Certified Building Inspector
C. Licensed Electrician
D. Certified Welder
Correct Answer: A. Certified Professional Soil Scientist
Rationale: Soil science is central to OSSF site evaluation. TCEQ recognizes a
Certified Professional Soil Scientist as one of the qualifying professional
pathways for Site Evaluator licensure.
Question 3. Which Texas administrative rules are especially important for
OSSF Site Evaluators?
A. 30 TAC Chapters 30 and 285
B. 16 TAC Chapter 25 only
C. 37 TAC Chapter 1 only
D. 43 TAC Chapter 5 only
Correct Answer: A. 30 TAC Chapters 30 and 285
1
,Rationale: 30 TAC Chapter 30 contains occupational licensing and
registration requirements, while 30 TAC Chapter 285 contains the principal
Texas rules governing On-Site Sewage Facilities. A Site Evaluator should
understand both the licensing requirements and the technical OSSF
requirements.
Question 4. What is the primary function of a licensed OSSF Site Evaluator?
A. Install all septic systems
B. Perform preconstruction site evaluations
C. Manufacture septic tanks
D. Operate municipal wastewater plants
Correct Answer: B. Perform preconstruction site evaluations
Rationale: A Site Evaluator is authorized to perform preconstruction site
evaluations to determine whether a property is suitable for a particular
OSSF. The evaluation identifies soil and site conditions that influence the type
and size of system that can appropriately be used.
Question 5. What does OSSF stand for in Texas?
A. On-Site Sewage Facility
B. On-Site Safety System Facility
C. Official Sewage Service Facility
D. On-Site Sanitation Field
Correct Answer: A. On-Site Sewage Facility
Rationale: OSSF means On-Site Sewage Facility. These systems treat and
dispose of wastewater on or near the property being served rather than
transporting the wastewater to a centralized municipal treatment plant.
Understanding the terminology is fundamental because Texas regulations use
the term OSSF throughout the licensing, design, installation, and permitting
requirements.
2
,Question 6. What information obtained during a site evaluation is used to
determine the OSSF type and size?
A. Soil and site conditions
B. Property owner's income
C. House color
D. Mortgage balance
Correct Answer: A. Soil and site conditions
Rationale: Soil characteristics, groundwater conditions, restrictive horizons,
drainage, slope, surface features, and other site conditions directly affect
wastewater treatment and dispersal. These findings are therefore essential
when determining the appropriate OSSF design.
Question 7. Which person may generally perform a required Texas OSSF site
evaluation?
A. Any homeowner
B. A licensed Site Evaluator or Professional Engineer
C. Any excavation contractor
D. Any real-estate agent
Correct Answer: B. A licensed Site Evaluator or Professional Engineer
Rationale: Texas rules require a complete site evaluation to be performed by
a qualified Site Evaluator or Professional Engineer. This ensures that the
evaluation is performed by someone with the appropriate professional
qualifications and regulatory authority.
Question 8. Is there a minimum college education requirement specifically
for the Texas Site Evaluator license?
A. Yes, a bachelor's degree is mandatory
B. Yes, a master's degree is mandatory
C. No minimum educational requirement is specified
D. A doctorate is mandatory
Correct Answer: C. No minimum educational requirement is specified
3
, Rationale: TCEQ does not specify a minimum educational degree
requirement for the Site Evaluator license. However, an applicant must meet
one of the qualifying credential or license pathways established by TCEQ.
Therefore, "no minimum education requirement" does not mean that anyone
can obtain the license without meeting other eligibility requirements.
Question 9. Which of the following can qualify an individual for the Texas Site
Evaluator license?
A. Current Installer II license
B. Current Designated Representative license
C. Texas Professional Engineer license
D. All of the above
Correct Answer: D. All of the above
Rationale: TCEQ recognizes several qualifying pathways. These include a
current Installer II, Designated Representative, Professional Engineer,
Professional Sanitarian, Certified Professional Soil Scientist, or
Professional Geoscientist licensed in the soil science discipline, subject to
the applicable requirements.
Question 10. Which state agency administers the Texas OSSF Site Evaluator
licensing program?
A. Texas Department of Transportation
B. Texas Commission on Environmental Quality
C. Texas Department of Agriculture
D. Texas Department of Insurance
Correct Answer: B. Texas Commission on Environmental Quality
Rationale: The Texas Commission on Environmental Quality (TCEQ)
administers the OSSF occupational licensing program. TCEQ regulates Site
Evaluators and other OSSF professionals and establishes requirements for
licensing, training, examinations, continuing education, and renewal.
4
Exam Questions with Correct Answers and Detailed Rationales
100% Verified | Latest Update 2026/2027 | Already Graded A+
Question 1. What is the primary purpose of a preconstruction site evaluation?
A. Determine whether the site is suitable for an OSSF
B. Determine the property's market value
C. Determine the homeowner's tax rate
D. Select the home's electrical contractor
Correct Answer: A. Determine whether the site is suitable for an OSSF
Rationale: The site evaluation establishes the physical and environmental
conditions necessary to determine whether an OSSF can function properly at
the proposed location. It also provides information used to select an
appropriate treatment and disposal method.
Question 2. Which professional credential is specifically relevant to soil
science qualification for Site Evaluator licensing?
A. Certified Professional Soil Scientist
B. Certified Building Inspector
C. Licensed Electrician
D. Certified Welder
Correct Answer: A. Certified Professional Soil Scientist
Rationale: Soil science is central to OSSF site evaluation. TCEQ recognizes a
Certified Professional Soil Scientist as one of the qualifying professional
pathways for Site Evaluator licensure.
Question 3. Which Texas administrative rules are especially important for
OSSF Site Evaluators?
A. 30 TAC Chapters 30 and 285
B. 16 TAC Chapter 25 only
C. 37 TAC Chapter 1 only
D. 43 TAC Chapter 5 only
Correct Answer: A. 30 TAC Chapters 30 and 285
1
,Rationale: 30 TAC Chapter 30 contains occupational licensing and
registration requirements, while 30 TAC Chapter 285 contains the principal
Texas rules governing On-Site Sewage Facilities. A Site Evaluator should
understand both the licensing requirements and the technical OSSF
requirements.
Question 4. What is the primary function of a licensed OSSF Site Evaluator?
A. Install all septic systems
B. Perform preconstruction site evaluations
C. Manufacture septic tanks
D. Operate municipal wastewater plants
Correct Answer: B. Perform preconstruction site evaluations
Rationale: A Site Evaluator is authorized to perform preconstruction site
evaluations to determine whether a property is suitable for a particular
OSSF. The evaluation identifies soil and site conditions that influence the type
and size of system that can appropriately be used.
Question 5. What does OSSF stand for in Texas?
A. On-Site Sewage Facility
B. On-Site Safety System Facility
C. Official Sewage Service Facility
D. On-Site Sanitation Field
Correct Answer: A. On-Site Sewage Facility
Rationale: OSSF means On-Site Sewage Facility. These systems treat and
dispose of wastewater on or near the property being served rather than
transporting the wastewater to a centralized municipal treatment plant.
Understanding the terminology is fundamental because Texas regulations use
the term OSSF throughout the licensing, design, installation, and permitting
requirements.
2
,Question 6. What information obtained during a site evaluation is used to
determine the OSSF type and size?
A. Soil and site conditions
B. Property owner's income
C. House color
D. Mortgage balance
Correct Answer: A. Soil and site conditions
Rationale: Soil characteristics, groundwater conditions, restrictive horizons,
drainage, slope, surface features, and other site conditions directly affect
wastewater treatment and dispersal. These findings are therefore essential
when determining the appropriate OSSF design.
Question 7. Which person may generally perform a required Texas OSSF site
evaluation?
A. Any homeowner
B. A licensed Site Evaluator or Professional Engineer
C. Any excavation contractor
D. Any real-estate agent
Correct Answer: B. A licensed Site Evaluator or Professional Engineer
Rationale: Texas rules require a complete site evaluation to be performed by
a qualified Site Evaluator or Professional Engineer. This ensures that the
evaluation is performed by someone with the appropriate professional
qualifications and regulatory authority.
Question 8. Is there a minimum college education requirement specifically
for the Texas Site Evaluator license?
A. Yes, a bachelor's degree is mandatory
B. Yes, a master's degree is mandatory
C. No minimum educational requirement is specified
D. A doctorate is mandatory
Correct Answer: C. No minimum educational requirement is specified
3
, Rationale: TCEQ does not specify a minimum educational degree
requirement for the Site Evaluator license. However, an applicant must meet
one of the qualifying credential or license pathways established by TCEQ.
Therefore, "no minimum education requirement" does not mean that anyone
can obtain the license without meeting other eligibility requirements.
Question 9. Which of the following can qualify an individual for the Texas Site
Evaluator license?
A. Current Installer II license
B. Current Designated Representative license
C. Texas Professional Engineer license
D. All of the above
Correct Answer: D. All of the above
Rationale: TCEQ recognizes several qualifying pathways. These include a
current Installer II, Designated Representative, Professional Engineer,
Professional Sanitarian, Certified Professional Soil Scientist, or
Professional Geoscientist licensed in the soil science discipline, subject to
the applicable requirements.
Question 10. Which state agency administers the Texas OSSF Site Evaluator
licensing program?
A. Texas Department of Transportation
B. Texas Commission on Environmental Quality
C. Texas Department of Agriculture
D. Texas Department of Insurance
Correct Answer: B. Texas Commission on Environmental Quality
Rationale: The Texas Commission on Environmental Quality (TCEQ)
administers the OSSF occupational licensing program. TCEQ regulates Site
Evaluators and other OSSF professionals and establishes requirements for
licensing, training, examinations, continuing education, and renewal.
4
