South Carolina Septic Tank Installer
SOUTH CAROLINA SEPTIC TANK INSTALLER CERTIFICATION EXAM
READY 2026/2027 - VERIFIED QUESTIONS AND ANSWERS
1. Which South Carolina agency regulates onsite wastewater systems under
Regulation 61-56?
A. U.S. Environmental Protection Agency
B. S.C. Department of Labor, Licensing and Regulation
C. S.C. Department of Natural Resources
D. S.C. Department of Health and Environmental Control (DHEC)
D. S.C. Department of Health and Environmental Control (DHEC) —
DHEC administers and enforces R.61-56, the Onsite Wastewater Systems
regulation, statewide.
2. What is the primary purpose of R.61-56 in South Carolina?
A. To protect public health and the environment from improperly treated
sewage
B. To license real estate agents selling rural property
C. To set property tax rates for rural land
D. To regulate municipal drinking water treatment plants
A. To protect public health and the environment from improperly treated
sewage — R.61-56 exists to prevent disease transmission and
environmental contamination from wastewater.
3. Before installing a septic tank system in South Carolina, an installer must
first obtain what?
A. Nothing if the lot is over one acre
B. A building permit only, with no DHEC involvement
C. A construction permit issued by DHEC
D. Verbal approval from a neighboring property owner
C. A construction permit issued by DHEC — DHEC issues the
construction permit only after site/soil evaluation confirms suitability.
4. Who is legally responsible for ensuring a septic system is installed according
to the approved permit?
A. The soil classifier only
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, South Carolina Septic Tank Installer
B. The licensed installer performing the work
C. The homeowner's insurance agent
D. The county tax assessor
B. The licensed installer performing the work — The licensed installer
bears responsibility for compliant construction per the approved permit.
5. In South Carolina, septic tank installers must be licensed through which
mechanism?
A. DHEC-administered installer registration/licensing program
B. Local municipal business license alone
C. A national plumbing board only
D. Self-certification with no oversight
A. DHEC-administered installer registration/licensing program — DHEC
maintains the registration and licensing requirements specific to onsite
wastewater installers.
6. What document must be on the job site during installation for DHEC
inspection purposes?
A. The approved permit and site/soil evaluation
B. The installer's personal tax return
C. A copy of the county zoning map only
D. The homeowner's mortgage statement
A. The approved permit and site/soil evaluation — Inspectors verify
installed work against the DHEC-approved permit and evaluation
documents.
7. An installer who deviates from the approved permit design without DHEC
approval is subject to what?
A. Automatic license upgrade
B. A warning letter only, regardless of severity
C. Enforcement action, including permit revocation or fines
D. No consequence if the system still functions
C. Enforcement action, including permit revocation or fines —
Unauthorized deviations violate R.61-56 and can trigger enforcement,
fines, or license action.
8. How long is a standard DHEC construction permit typically valid before it
may expire if work is not started?
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, South Carolina Septic Tank Installer
A. Indefinitely with no expiration
B. A defined period set by DHEC, after which renewal is required
C. Only 48 hours
D. One week
B. A defined period set by DHEC, after which renewal is required —
Permits carry a defined validity window; installers must renew if
construction is delayed.
9. What is required before final approval (operating permit) is issued for a
completed system?
A. Nothing beyond the initial construction permit
B. Payment of property taxes for the year
C. A final inspection confirming installation matches the approved permit
D. A letter from the local fire department
C. A final inspection confirming installation matches the approved permit
— Final inspection verifies as-built compliance before DHEC issues
approval to operate.
10. Which of the following best describes an installer's continuing education
obligation in South Carolina?
A. Only required for engineers, not installers
B. Periodic training/renewal requirements to maintain licensure
C. No continuing education is ever required
D. One-time training with lifetime validity
B. Periodic training/renewal requirements to maintain licensure —
Licensed installers must meet periodic renewal and training requirements
set by DHEC.
11. If a homeowner requests an installer bypass DHEC permitting to save
time, the installer should:
A. Refuse and explain permitting is legally required
B. Comply since the homeowner owns the property
C. Only permit the tank, not the drainfield
D. Install it and permit it later once inspected
A. Refuse and explain permitting is legally required — Installers must
follow R.61-56 regardless of homeowner pressure; unpermitted work is
illegal.
12. What is the role of a licensed soil classifier in the SC permitting process?
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, South Carolina Septic Tank Installer
A. Pouring the septic tank concrete
B. Evaluating and classifying site soils to determine suitability and system
sizing
C. Setting the final sale price of the property
D. Selling septic tanks to installers
B. Evaluating and classifying site soils to determine suitability and system
sizing — Soil classifiers assess texture, structure, and restrictive features to
guide system design.
13. Under R.61-56, who may perform the required site and soil evaluation for
a permit application?
A. A real estate appraiser
B. A DHEC-approved/licensed soil classifier or qualified professional
C. The property owner, self-certified
D. Any licensed installer without additional credentials
B. A DHEC-approved/licensed soil classifier or qualified professional —
Only qualified, credentialed evaluators may perform the soil evaluation
DHEC relies on.
14. What happens if an installer's license lapses while a job is in progress?
A. Nothing changes; licensing is only advisory
B. The installer must cease regulated work until the license is reinstated
C. Work may continue since the job was already started
D. The permit automatically transfers to another installer
B. The installer must cease regulated work until the license is reinstated —
An installer must hold a valid, active license to legally perform permitted
work.
15. Which statement about system modifications (repairs/alterations) is
correct under R.61-56?
A. Alterations are exempt if performed by the original installer
B. Any repair can be done without notifying DHEC
C. Most repairs and alterations require DHEC notification or a new permit
D. Only additions of bedrooms require permits
C. Most repairs and alterations require DHEC notification or a new permit
— Significant repairs or alterations generally require DHEC review to
ensure continued compliance.
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SOUTH CAROLINA SEPTIC TANK INSTALLER CERTIFICATION EXAM
READY 2026/2027 - VERIFIED QUESTIONS AND ANSWERS
1. Which South Carolina agency regulates onsite wastewater systems under
Regulation 61-56?
A. U.S. Environmental Protection Agency
B. S.C. Department of Labor, Licensing and Regulation
C. S.C. Department of Natural Resources
D. S.C. Department of Health and Environmental Control (DHEC)
D. S.C. Department of Health and Environmental Control (DHEC) —
DHEC administers and enforces R.61-56, the Onsite Wastewater Systems
regulation, statewide.
2. What is the primary purpose of R.61-56 in South Carolina?
A. To protect public health and the environment from improperly treated
sewage
B. To license real estate agents selling rural property
C. To set property tax rates for rural land
D. To regulate municipal drinking water treatment plants
A. To protect public health and the environment from improperly treated
sewage — R.61-56 exists to prevent disease transmission and
environmental contamination from wastewater.
3. Before installing a septic tank system in South Carolina, an installer must
first obtain what?
A. Nothing if the lot is over one acre
B. A building permit only, with no DHEC involvement
C. A construction permit issued by DHEC
D. Verbal approval from a neighboring property owner
C. A construction permit issued by DHEC — DHEC issues the
construction permit only after site/soil evaluation confirms suitability.
4. Who is legally responsible for ensuring a septic system is installed according
to the approved permit?
A. The soil classifier only
Page 1 of 57
, South Carolina Septic Tank Installer
B. The licensed installer performing the work
C. The homeowner's insurance agent
D. The county tax assessor
B. The licensed installer performing the work — The licensed installer
bears responsibility for compliant construction per the approved permit.
5. In South Carolina, septic tank installers must be licensed through which
mechanism?
A. DHEC-administered installer registration/licensing program
B. Local municipal business license alone
C. A national plumbing board only
D. Self-certification with no oversight
A. DHEC-administered installer registration/licensing program — DHEC
maintains the registration and licensing requirements specific to onsite
wastewater installers.
6. What document must be on the job site during installation for DHEC
inspection purposes?
A. The approved permit and site/soil evaluation
B. The installer's personal tax return
C. A copy of the county zoning map only
D. The homeowner's mortgage statement
A. The approved permit and site/soil evaluation — Inspectors verify
installed work against the DHEC-approved permit and evaluation
documents.
7. An installer who deviates from the approved permit design without DHEC
approval is subject to what?
A. Automatic license upgrade
B. A warning letter only, regardless of severity
C. Enforcement action, including permit revocation or fines
D. No consequence if the system still functions
C. Enforcement action, including permit revocation or fines —
Unauthorized deviations violate R.61-56 and can trigger enforcement,
fines, or license action.
8. How long is a standard DHEC construction permit typically valid before it
may expire if work is not started?
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, South Carolina Septic Tank Installer
A. Indefinitely with no expiration
B. A defined period set by DHEC, after which renewal is required
C. Only 48 hours
D. One week
B. A defined period set by DHEC, after which renewal is required —
Permits carry a defined validity window; installers must renew if
construction is delayed.
9. What is required before final approval (operating permit) is issued for a
completed system?
A. Nothing beyond the initial construction permit
B. Payment of property taxes for the year
C. A final inspection confirming installation matches the approved permit
D. A letter from the local fire department
C. A final inspection confirming installation matches the approved permit
— Final inspection verifies as-built compliance before DHEC issues
approval to operate.
10. Which of the following best describes an installer's continuing education
obligation in South Carolina?
A. Only required for engineers, not installers
B. Periodic training/renewal requirements to maintain licensure
C. No continuing education is ever required
D. One-time training with lifetime validity
B. Periodic training/renewal requirements to maintain licensure —
Licensed installers must meet periodic renewal and training requirements
set by DHEC.
11. If a homeowner requests an installer bypass DHEC permitting to save
time, the installer should:
A. Refuse and explain permitting is legally required
B. Comply since the homeowner owns the property
C. Only permit the tank, not the drainfield
D. Install it and permit it later once inspected
A. Refuse and explain permitting is legally required — Installers must
follow R.61-56 regardless of homeowner pressure; unpermitted work is
illegal.
12. What is the role of a licensed soil classifier in the SC permitting process?
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, South Carolina Septic Tank Installer
A. Pouring the septic tank concrete
B. Evaluating and classifying site soils to determine suitability and system
sizing
C. Setting the final sale price of the property
D. Selling septic tanks to installers
B. Evaluating and classifying site soils to determine suitability and system
sizing — Soil classifiers assess texture, structure, and restrictive features to
guide system design.
13. Under R.61-56, who may perform the required site and soil evaluation for
a permit application?
A. A real estate appraiser
B. A DHEC-approved/licensed soil classifier or qualified professional
C. The property owner, self-certified
D. Any licensed installer without additional credentials
B. A DHEC-approved/licensed soil classifier or qualified professional —
Only qualified, credentialed evaluators may perform the soil evaluation
DHEC relies on.
14. What happens if an installer's license lapses while a job is in progress?
A. Nothing changes; licensing is only advisory
B. The installer must cease regulated work until the license is reinstated
C. Work may continue since the job was already started
D. The permit automatically transfers to another installer
B. The installer must cease regulated work until the license is reinstated —
An installer must hold a valid, active license to legally perform permitted
work.
15. Which statement about system modifications (repairs/alterations) is
correct under R.61-56?
A. Alterations are exempt if performed by the original installer
B. Any repair can be done without notifying DHEC
C. Most repairs and alterations require DHEC notification or a new permit
D. Only additions of bedrooms require permits
C. Most repairs and alterations require DHEC notification or a new permit
— Significant repairs or alterations generally require DHEC review to
ensure continued compliance.
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