NPDES Permit Inspector Exam Practice
Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
Question 1
What is the primary purpose of the NPDES permit program?
A. To regulate construction contracts
B. To establish requirements for controlling pollutant discharges to waters of the
United States
C. To approve local building designs
D. To regulate employee safety programs
Correct Answer: B. To establish requirements for controlling pollutant
discharges to waters of the United States
Rationale: The National Pollutant Discharge Elimination System (NPDES)
establishes a permitting framework for regulated discharges of pollutants from
point sources. Permit conditions are used to control those discharges and protect
water quality.
Question 2
What is the primary purpose of an NPDES compliance inspection?
A. To determine the contractor's profitability
B. To evaluate compliance with applicable permit requirements
C. To approve the project's architectural plans
D. To determine the site's property value
Correct Answer: B. To evaluate compliance with applicable permit requirements
,Rationale: An NPDES inspection is intended to determine whether the regulated
entity is complying with its permit and applicable requirements. For stormwater
sites, the inspection can include review of the permit, SWPPP, records, and field
conditions.
Question 3
Which document should an inspector review to understand the site's planned
stormwater controls?
A. Employee handbook
B. Construction contract
C. Stormwater Pollution Prevention Plan
D. Equipment purchase agreement
Correct Answer: C. Stormwater Pollution Prevention Plan
Rationale: The SWPPP documents how the operator intends to comply with
stormwater permit requirements and identifies site-specific pollution sources and
control measures. EPA inspection guidance recommends reviewing the SWPPP and
site map as part of the inspection process.
Question 4
Which item is most important for an inspector to compare during a field
inspection?
A. The SWPPP's described controls with the controls actually present on site
B. The contractor's payroll with its tax records
C. The project's architectural drawings with its advertising materials
D. The equipment inventory with employee schedules
Correct Answer: A. The SWPPP's described controls with the controls actually
present on site
Rationale: An inspector evaluates whether the SWPPP is accurately implemented.
The field inspection should verify that required BMPs are present, properly
installed, maintained, and functioning as intended.
,Question 5
Under the federal construction stormwater framework, construction activity
generally becomes subject to NPDES stormwater permitting when it disturbs:
A. 1 acre or more, subject to applicable regulatory requirements
B. Exactly 10 acres in every case
C. Any area smaller than 100 square feet
D. Only federally owned land
Correct Answer: A. 1 acre or more, subject to applicable regulatory
requirements
Rationale: EPA identifies construction activity disturbing one or more acres as
generally requiring NPDES stormwater permit coverage. Smaller disturbances may
also be regulated when they are part of a common plan of development or sale
that ultimately disturbs at least one acre.
Question 6
A project disturbs 0.7 acres but is part of a common plan of development that will
ultimately disturb 3 acres. What is the key permit consideration?
A. The project automatically qualifies for an exemption
B. Only the currently disturbed acreage matters
C. The common plan may make the activity subject to construction stormwater
permitting
D. Construction stormwater permits apply only to projects exceeding 10 acres
Correct Answer: C. The common plan may make the activity subject to
construction stormwater permitting
Rationale: A project disturbing less than one acre can still fall within construction
stormwater requirements when it is part of a common plan of development or sale
that will ultimately disturb one or more acres.
, Question 7
Which person is generally considered an operator for purposes of construction
stormwater permit coverage?
A. A visitor to the site
B. A person with operational control over construction plans or day-to-day
activities necessary for permit compliance
C. A neighboring property owner with no role in the project
D. A delivery driver making a single delivery
Correct Answer: B. A person with operational control over construction plans or
day-to-day activities necessary for permit compliance
Rationale: EPA describes operators in terms of operational control, including
control over construction plans and specifications or day-to-day activities needed
to ensure compliance with permit conditions.
Question 8
What is the purpose of a Notice of Intent (NOI)?
A. To notify the permitting authority of the intent to obtain permit coverage
B. To terminate permit coverage
C. To replace the SWPPP
D. To document final site stabilization only
Correct Answer: A. To notify the permitting authority of the intent to obtain
permit coverage
Rationale: The NOI is the mechanism used under the applicable general permit
process to notify the permitting authority that the operator intends to obtain
coverage. It does not replace the SWPPP.
Question 9
Which document generally communicates that an operator is ending coverage
under an applicable construction general permit?
Questions and Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
Question 1
What is the primary purpose of the NPDES permit program?
A. To regulate construction contracts
B. To establish requirements for controlling pollutant discharges to waters of the
United States
C. To approve local building designs
D. To regulate employee safety programs
Correct Answer: B. To establish requirements for controlling pollutant
discharges to waters of the United States
Rationale: The National Pollutant Discharge Elimination System (NPDES)
establishes a permitting framework for regulated discharges of pollutants from
point sources. Permit conditions are used to control those discharges and protect
water quality.
Question 2
What is the primary purpose of an NPDES compliance inspection?
A. To determine the contractor's profitability
B. To evaluate compliance with applicable permit requirements
C. To approve the project's architectural plans
D. To determine the site's property value
Correct Answer: B. To evaluate compliance with applicable permit requirements
,Rationale: An NPDES inspection is intended to determine whether the regulated
entity is complying with its permit and applicable requirements. For stormwater
sites, the inspection can include review of the permit, SWPPP, records, and field
conditions.
Question 3
Which document should an inspector review to understand the site's planned
stormwater controls?
A. Employee handbook
B. Construction contract
C. Stormwater Pollution Prevention Plan
D. Equipment purchase agreement
Correct Answer: C. Stormwater Pollution Prevention Plan
Rationale: The SWPPP documents how the operator intends to comply with
stormwater permit requirements and identifies site-specific pollution sources and
control measures. EPA inspection guidance recommends reviewing the SWPPP and
site map as part of the inspection process.
Question 4
Which item is most important for an inspector to compare during a field
inspection?
A. The SWPPP's described controls with the controls actually present on site
B. The contractor's payroll with its tax records
C. The project's architectural drawings with its advertising materials
D. The equipment inventory with employee schedules
Correct Answer: A. The SWPPP's described controls with the controls actually
present on site
Rationale: An inspector evaluates whether the SWPPP is accurately implemented.
The field inspection should verify that required BMPs are present, properly
installed, maintained, and functioning as intended.
,Question 5
Under the federal construction stormwater framework, construction activity
generally becomes subject to NPDES stormwater permitting when it disturbs:
A. 1 acre or more, subject to applicable regulatory requirements
B. Exactly 10 acres in every case
C. Any area smaller than 100 square feet
D. Only federally owned land
Correct Answer: A. 1 acre or more, subject to applicable regulatory
requirements
Rationale: EPA identifies construction activity disturbing one or more acres as
generally requiring NPDES stormwater permit coverage. Smaller disturbances may
also be regulated when they are part of a common plan of development or sale
that ultimately disturbs at least one acre.
Question 6
A project disturbs 0.7 acres but is part of a common plan of development that will
ultimately disturb 3 acres. What is the key permit consideration?
A. The project automatically qualifies for an exemption
B. Only the currently disturbed acreage matters
C. The common plan may make the activity subject to construction stormwater
permitting
D. Construction stormwater permits apply only to projects exceeding 10 acres
Correct Answer: C. The common plan may make the activity subject to
construction stormwater permitting
Rationale: A project disturbing less than one acre can still fall within construction
stormwater requirements when it is part of a common plan of development or sale
that will ultimately disturb one or more acres.
, Question 7
Which person is generally considered an operator for purposes of construction
stormwater permit coverage?
A. A visitor to the site
B. A person with operational control over construction plans or day-to-day
activities necessary for permit compliance
C. A neighboring property owner with no role in the project
D. A delivery driver making a single delivery
Correct Answer: B. A person with operational control over construction plans or
day-to-day activities necessary for permit compliance
Rationale: EPA describes operators in terms of operational control, including
control over construction plans and specifications or day-to-day activities needed
to ensure compliance with permit conditions.
Question 8
What is the purpose of a Notice of Intent (NOI)?
A. To notify the permitting authority of the intent to obtain permit coverage
B. To terminate permit coverage
C. To replace the SWPPP
D. To document final site stabilization only
Correct Answer: A. To notify the permitting authority of the intent to obtain
permit coverage
Rationale: The NOI is the mechanism used under the applicable general permit
process to notify the permitting authority that the operator intends to obtain
coverage. It does not replace the SWPPP.
Question 9
Which document generally communicates that an operator is ending coverage
under an applicable construction general permit?
