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Texas On-Site Sewage Facility (OSSF) Installer II Exam
COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Texas OSSF Installer II Exam
Exam Coverage Summary
The Texas OSSF Installer II license is the advanced installer certification issued by the Texas Commission
on Environmental Quality (TCEQ), authorizing holders to install all types of On-Site Sewage Facilities —
including conventional, aerobic, sand filter, and drip irrigation systems.
Requirements:
Pathway Education Experience Training
Installer I None 1 year as Installer I + 3 installations (or TEEX Installer II
Upgrade required approved documentation) Basic (20 hrs)
Apprentice None TEEX Installer II
2 years as Apprentice + 6 installations
Upgrade required Basic (20 hrs)
Application & Exam:
• Application fee: $111
• Exam passing rate: 70% (TCEQ minimum passing standard)
• License term: 3 years
• CE requirement for renewal: 24 hours of TCEQ-approved continuing education over 3 years
Question 1
What is the primary threat from malfunctioning OSSF systems?
A) Air pollution
B) Waterborne disease
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C) Noise pollution
D) Soil erosion
Correct Answer: B
Summary Rationale: Malfunctioning OSSF systems can release untreated pathogens into ground and
surface water, posing significant public health risks from waterborne diseases .
Question 2
The Texas Commission on Environmental Quality (TCEQ) began statewide regulation of OSSF systems in:
A) 1972
B) 1989
C) 1997
D) 2001
Correct Answer: B
*Summary Rationale: Statewide regulation of on-site sewage facilities began in September 1989 .*
Question 3
Wastewater disposal and OSSF systems are regulated primarily to protect:
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A) Property values
B) Public health and the environment
C) Homeowner aesthetics
D) Plumbing system longevity
Correct Answer: B
Summary Rationale: The fundamental purpose of OSSF regulation is to protect public health and the
environment from improperly treated sewage .
Question 4
A pathogen is best defined as:
A) A type of chemical contaminant
B) A disease-causing microorganism
C) A soil particle
D) A wastewater treatment chemical
Correct Answer: B
Summary Rationale: A pathogen is a disease-causing microorganism such as bacteria, viruses, or
protozoa that can be present in untreated sewage .
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Question 5
A groundwater chemical contaminant that can result from septic tank leachfields and causes
methemoglobinemia ("blue baby syndrome") in infants is:
A) Chlorine
B) Phosphates
C) Nitrates
D) Sulfates
Correct Answer: C
Summary Rationale: Nitrates from septic systems can contaminate groundwater. When ingested by
infants, nitrates interfere with oxygen transport in the blood, causing methemoglobinemia (blue baby
syndrome) .
Question 6
What does pH measure in wastewater?
A) Temperature
B) Acidity or basicity
C) Dissolved oxygen levels
D) Bacterial content
Texas On-Site Sewage Facility (OSSF) Installer II Exam
COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Texas OSSF Installer II Exam
Exam Coverage Summary
The Texas OSSF Installer II license is the advanced installer certification issued by the Texas Commission
on Environmental Quality (TCEQ), authorizing holders to install all types of On-Site Sewage Facilities —
including conventional, aerobic, sand filter, and drip irrigation systems.
Requirements:
Pathway Education Experience Training
Installer I None 1 year as Installer I + 3 installations (or TEEX Installer II
Upgrade required approved documentation) Basic (20 hrs)
Apprentice None TEEX Installer II
2 years as Apprentice + 6 installations
Upgrade required Basic (20 hrs)
Application & Exam:
• Application fee: $111
• Exam passing rate: 70% (TCEQ minimum passing standard)
• License term: 3 years
• CE requirement for renewal: 24 hours of TCEQ-approved continuing education over 3 years
Question 1
What is the primary threat from malfunctioning OSSF systems?
A) Air pollution
B) Waterborne disease
, Page 2 of 110
C) Noise pollution
D) Soil erosion
Correct Answer: B
Summary Rationale: Malfunctioning OSSF systems can release untreated pathogens into ground and
surface water, posing significant public health risks from waterborne diseases .
Question 2
The Texas Commission on Environmental Quality (TCEQ) began statewide regulation of OSSF systems in:
A) 1972
B) 1989
C) 1997
D) 2001
Correct Answer: B
*Summary Rationale: Statewide regulation of on-site sewage facilities began in September 1989 .*
Question 3
Wastewater disposal and OSSF systems are regulated primarily to protect:
, Page 3 of 110
A) Property values
B) Public health and the environment
C) Homeowner aesthetics
D) Plumbing system longevity
Correct Answer: B
Summary Rationale: The fundamental purpose of OSSF regulation is to protect public health and the
environment from improperly treated sewage .
Question 4
A pathogen is best defined as:
A) A type of chemical contaminant
B) A disease-causing microorganism
C) A soil particle
D) A wastewater treatment chemical
Correct Answer: B
Summary Rationale: A pathogen is a disease-causing microorganism such as bacteria, viruses, or
protozoa that can be present in untreated sewage .
, Page 4 of 110
Question 5
A groundwater chemical contaminant that can result from septic tank leachfields and causes
methemoglobinemia ("blue baby syndrome") in infants is:
A) Chlorine
B) Phosphates
C) Nitrates
D) Sulfates
Correct Answer: C
Summary Rationale: Nitrates from septic systems can contaminate groundwater. When ingested by
infants, nitrates interfere with oxygen transport in the blood, causing methemoglobinemia (blue baby
syndrome) .
Question 6
What does pH measure in wastewater?
A) Temperature
B) Acidity or basicity
C) Dissolved oxygen levels
D) Bacterial content
