SOUTH CAROLINA SEPTIC TANK INSTALLER LICENSE EXAM – QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Regulatory Framework and Licensing Administration
Site Evaluation and Soil Science
System Design and Component Function
Installation Procedures and Construction Standards
Health, Safety, and Environmental Protection
Professional Ethics and Legal Compliance
Troubleshooting, Repair, and System Maintenance
Introduction
The South Carolina Septic Tank Installer License Examination is designed to assess
the knowledge, skills, and competency of individuals seeking licensure to install
onsite wastewater systems. The exam evaluates a candidate's understanding of
Regulation 61-56, soil evaluation, system design principles, and installation
standards. The assessment utilizes multiple-choice and scenario-based questions to
simulate real-world challenges. Emphasis is placed on practical application, decision-
making, and strict adherence to public health and environmental regulations. This
comprehensive assessment ensures that licensed installers are prepared to protect
water quality and public safety across the state.
SECTION ONE: QUESTIONS 1–50
1. Which state agency is responsible for administering the licensing examination
and enforcing Regulation 61-56 for onsite wastewater systems in South Carolina?
,A. South Carolina Department of Labor, Licensing and Regulation (LLR)
B. South Carolina Department of Health and Environmental Control (DHEC)
C. South Carolina Department of Environmental Services (SCDES)
D. South Carolina Department of Natural Resources (DNR)
🟢 Correct Answer: C. South Carolina Department of Environmental Services
(SCDES)
🔴 Explanation: As of July 1, 2024, the environmental regulatory functions of
DHEC, including the enforcement of R.61-56 and licensing of septic installers, were
transferred to the newly established South Carolina Department of Environmental
Services (SCDES).
2. What is the minimum passing score required for the South Carolina septic
system installer licensing examination?
A. 70%
B. 75%
C. 80%
D. 85%
🟢 Correct Answer: C. 80%
🔴 Explanation: Regulation 61-56 mandates that an applicant must achieve a score
of 80% or better on the licensing exam to demonstrate competency in the required
subject matter.
3. A Tier 1 Installer license authorizes the holder to install which of the following?
A. All gravity-fed and fill-cap residential systems
B. Systems requiring pumps and grease traps
C. Commercial onsite wastewater systems
D. Standard 610 Specialized Onsite Wastewater Systems
🟢 Correct Answer: A. All gravity-fed and fill-cap residential systems
,🔴 Explanation: Tier 1 is the entry-level license restricted to new gravity-fed and
fill-cap residential systems. Pressurized systems, commercial systems, and
specialized engineered systems require higher tiers of licensure.
4. Which continuing education requirement must a Tier 2 Installer fulfill every
two years?
A. 8 hours of CEUs
B. 12 hours of CEUs
C. 16 hours of CEUs
D. 18 hours of CEUs
🟢 Correct Answer: B. 12 hours of CEUs
🔴 Explanation: Tier 2 installers are required to obtain 12 hours of continuing
education units every two years to maintain their license and stay current with
evolving standards.
5. Under South Carolina regulations, a construction permit for a septic system is
generally valid for what duration?
A. 1 year
B. 2 years
C. 3 years
D. 5 years
🟢 Correct Answer: C. 3 years
🔴 Explanation: Permits typically expire after three years if construction has not
commenced or substantial progress has not been made, ensuring site conditions
remain suitable for the approved design.
6. If a licensed installer allows their license to expire by failing to pay renewal
fees, what is the consequence?
, A. A late fee is assessed, and the license remains valid
B. The license drops to a Tier 1 status automatically
C. The installer must repeat the new license process, including retaking the exam
D. The license can be reinstated upon written request to the Department
🟢 Correct Answer: C. The installer must repeat the new license process, including
retaking the exam
🔴 Explanation: If a license is not renewed within the allowable period, it expires.
SCDES treats an expired license holder as a new applicant, requiring them to pass
the examination again to ensure current competency.
7. Who is legally responsible for obtaining the construction permit before
installing a septic system in South Carolina?
A. The property owner
B. The general contractor building the home
C. The licensed septic tank installer
D. The real estate agent handling the sale
🟢 Correct Answer: C. The licensed septic tank installer
🔴 Explanation: The licensed installer is legally responsible for ensuring that a
permit is obtained from the Department before any construction or repair work
begins on an onsite wastewater system.
8. What is the minimum setback distance required between a septic tank and a
private drinking water well?
A. 25 feet
B. 50 feet
C. 75 feet
D. 100 feet
🟢 Correct Answer: C. 75 feet
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Regulatory Framework and Licensing Administration
Site Evaluation and Soil Science
System Design and Component Function
Installation Procedures and Construction Standards
Health, Safety, and Environmental Protection
Professional Ethics and Legal Compliance
Troubleshooting, Repair, and System Maintenance
Introduction
The South Carolina Septic Tank Installer License Examination is designed to assess
the knowledge, skills, and competency of individuals seeking licensure to install
onsite wastewater systems. The exam evaluates a candidate's understanding of
Regulation 61-56, soil evaluation, system design principles, and installation
standards. The assessment utilizes multiple-choice and scenario-based questions to
simulate real-world challenges. Emphasis is placed on practical application, decision-
making, and strict adherence to public health and environmental regulations. This
comprehensive assessment ensures that licensed installers are prepared to protect
water quality and public safety across the state.
SECTION ONE: QUESTIONS 1–50
1. Which state agency is responsible for administering the licensing examination
and enforcing Regulation 61-56 for onsite wastewater systems in South Carolina?
,A. South Carolina Department of Labor, Licensing and Regulation (LLR)
B. South Carolina Department of Health and Environmental Control (DHEC)
C. South Carolina Department of Environmental Services (SCDES)
D. South Carolina Department of Natural Resources (DNR)
🟢 Correct Answer: C. South Carolina Department of Environmental Services
(SCDES)
🔴 Explanation: As of July 1, 2024, the environmental regulatory functions of
DHEC, including the enforcement of R.61-56 and licensing of septic installers, were
transferred to the newly established South Carolina Department of Environmental
Services (SCDES).
2. What is the minimum passing score required for the South Carolina septic
system installer licensing examination?
A. 70%
B. 75%
C. 80%
D. 85%
🟢 Correct Answer: C. 80%
🔴 Explanation: Regulation 61-56 mandates that an applicant must achieve a score
of 80% or better on the licensing exam to demonstrate competency in the required
subject matter.
3. A Tier 1 Installer license authorizes the holder to install which of the following?
A. All gravity-fed and fill-cap residential systems
B. Systems requiring pumps and grease traps
C. Commercial onsite wastewater systems
D. Standard 610 Specialized Onsite Wastewater Systems
🟢 Correct Answer: A. All gravity-fed and fill-cap residential systems
,🔴 Explanation: Tier 1 is the entry-level license restricted to new gravity-fed and
fill-cap residential systems. Pressurized systems, commercial systems, and
specialized engineered systems require higher tiers of licensure.
4. Which continuing education requirement must a Tier 2 Installer fulfill every
two years?
A. 8 hours of CEUs
B. 12 hours of CEUs
C. 16 hours of CEUs
D. 18 hours of CEUs
🟢 Correct Answer: B. 12 hours of CEUs
🔴 Explanation: Tier 2 installers are required to obtain 12 hours of continuing
education units every two years to maintain their license and stay current with
evolving standards.
5. Under South Carolina regulations, a construction permit for a septic system is
generally valid for what duration?
A. 1 year
B. 2 years
C. 3 years
D. 5 years
🟢 Correct Answer: C. 3 years
🔴 Explanation: Permits typically expire after three years if construction has not
commenced or substantial progress has not been made, ensuring site conditions
remain suitable for the approved design.
6. If a licensed installer allows their license to expire by failing to pay renewal
fees, what is the consequence?
, A. A late fee is assessed, and the license remains valid
B. The license drops to a Tier 1 status automatically
C. The installer must repeat the new license process, including retaking the exam
D. The license can be reinstated upon written request to the Department
🟢 Correct Answer: C. The installer must repeat the new license process, including
retaking the exam
🔴 Explanation: If a license is not renewed within the allowable period, it expires.
SCDES treats an expired license holder as a new applicant, requiring them to pass
the examination again to ensure current competency.
7. Who is legally responsible for obtaining the construction permit before
installing a septic system in South Carolina?
A. The property owner
B. The general contractor building the home
C. The licensed septic tank installer
D. The real estate agent handling the sale
🟢 Correct Answer: C. The licensed septic tank installer
🔴 Explanation: The licensed installer is legally responsible for ensuring that a
permit is obtained from the Department before any construction or repair work
begins on an onsite wastewater system.
8. What is the minimum setback distance required between a septic tank and a
private drinking water well?
A. 25 feet
B. 50 feet
C. 75 feet
D. 100 feet
🟢 Correct Answer: C. 75 feet
