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South Carolina (SC) Septic Tank Contractor
Practice Exam | Full Course – 2025 Edition
( Questions | Answers & Rationales)
1. What is the primary regulatory document governing onsite
wastewater systems in South Carolina?
a) NFPA 1403
b) SC DHEC Regulation 61-56
c) SC Department of Labor, Licensing and Regulation (LLR) Title
40
d) The International Plumbing Code (IPC)
Answer: b
Rationale: SC DHEC Regulation 61-56 is the official regulation
that specifies the minimum standards for the construction, design,
and installation of septic systems in South Carolina. NFPA 1403 is
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unrelated, and while Title 40 covers contractors, it does not
detail technical wastewater standards.
Q2. Which state agency has the primary authority for regulating
septic systems in South Carolina?
a) Department of Labor, Licensing and Regulation (LLR)
b) Department of Environmental Services (DES)
c) Department of Health and Environmental Control (DHEC)
d) Department of Natural Resources (DNR)
Answer: c
Rationale: In South Carolina, DHEC is the state agency
responsible for environmental health and safety, including the
regulation of onsite wastewater systems. DES is a newer
department that took over some environmental functions, but
DHEC remains the historical and primary authority cited in exam
materials.
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Q3. To install septic systems in South Carolina, a contractor must
hold which specific type of license?
a) A Residential Home Builder License
b) A General Contractor's License
c) An Onsite Wastewater Systems Contractor License (Tier 1 or
Tier 2)
d) A Plumbing Contractor's License
Answer: c
Rationale: SC Code of Regulations 61-56 requires a license to
construct or repair onsite wastewater systems. Applicants must
pass an exam with a minimum score of 80% to become a Tier 1
or Tier 2 installer.
Q4. What is the minimum passing score for the SC septic tank
contractor licensing exam?
a) 70%
b) 75%
South Carolina (SC) Septic Tank Contractor
Practice Exam | Full Course – 2025 Edition
( Questions | Answers & Rationales)
1. What is the primary regulatory document governing onsite
wastewater systems in South Carolina?
a) NFPA 1403
b) SC DHEC Regulation 61-56
c) SC Department of Labor, Licensing and Regulation (LLR) Title
40
d) The International Plumbing Code (IPC)
Answer: b
Rationale: SC DHEC Regulation 61-56 is the official regulation
that specifies the minimum standards for the construction, design,
and installation of septic systems in South Carolina. NFPA 1403 is
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unrelated, and while Title 40 covers contractors, it does not
detail technical wastewater standards.
Q2. Which state agency has the primary authority for regulating
septic systems in South Carolina?
a) Department of Labor, Licensing and Regulation (LLR)
b) Department of Environmental Services (DES)
c) Department of Health and Environmental Control (DHEC)
d) Department of Natural Resources (DNR)
Answer: c
Rationale: In South Carolina, DHEC is the state agency
responsible for environmental health and safety, including the
regulation of onsite wastewater systems. DES is a newer
department that took over some environmental functions, but
DHEC remains the historical and primary authority cited in exam
materials.
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Q3. To install septic systems in South Carolina, a contractor must
hold which specific type of license?
a) A Residential Home Builder License
b) A General Contractor's License
c) An Onsite Wastewater Systems Contractor License (Tier 1 or
Tier 2)
d) A Plumbing Contractor's License
Answer: c
Rationale: SC Code of Regulations 61-56 requires a license to
construct or repair onsite wastewater systems. Applicants must
pass an exam with a minimum score of 80% to become a Tier 1
or Tier 2 installer.
Q4. What is the minimum passing score for the SC septic tank
contractor licensing exam?
a) 70%
b) 75%
