Walmart-Stormwater Practice Exam
Walmart-Stormwater Practice Exam 2026
Edition 100 Advanced Questions with
Answers and Detailed Rationales
Part 1 (Questions 1–25)
Question 1
Which federal law established the foundation for stormwater pollution regulation in the United
States?
A. Resource Conservation and Recovery Act (RCRA)
B. Clean Water Act
C. Safe Drinking Water Act
D. CERCLA
Answer: B
Rationale:
The Clean Water Act established the framework for regulating pollutant discharges into waters
of the United States and later led to the NPDES permitting program.
Question 2
Construction activities disturbing at least how many acres generally require NPDES permit
coverage?
A. 0.25 acre
B. 0.5 acre
C. 1 acre
D. 5 acres
Answer: C
, Walmart-Stormwater Practice Exam
Rationale:
Federal regulations generally require permit coverage for construction disturbing one acre or
more (or part of a larger common plan).
Question 3
The primary purpose of a Stormwater Pollution Prevention Plan (SWPPP) is to:
A. Increase construction productivity
B. Prevent pollutants from leaving the site
C. Reduce construction costs
D. Document employee attendance
Answer: B
Rationale:
A SWPPP identifies pollutant sources and describes Best Management Practices (BMPs) used to
minimize pollutant discharge.
Question 4
Which pollutant is typically the greatest concern from construction sites?
A. Chlorine
B. Sediment
C. Mercury
D. Nitrogen gas
Answer: B
Rationale:
Sediment is the most common pollutant generated from disturbed construction areas.
Question 5
, Walmart-Stormwater Practice Exam
Which BMP controls erosion rather than sediment?
A. Silt fence
B. Inlet protection
C. Temporary seeding
D. Sediment basin
Answer: C
Rationale:
Temporary vegetation prevents soil from eroding rather than trapping sediment after erosion
occurs.
Question 6
A silt fence is primarily designed to:
A. Divert groundwater
B. Filter sediment from runoff
C. Prevent flooding
D. Stop rainfall
Answer: B
Rationale:
Silt fences intercept sheet flow and trap sediment before runoff leaves the site.
Question 7
Concrete washout water should be:
A. Discharged into storm drains
B. Pumped into nearby streams
C. Contained in a designated washout area
, Walmart-Stormwater Practice Exam
D. Mixed with soil
Answer: C
Rationale:
Concrete washout is highly alkaline and must be properly contained.
Question 8
Which activity should be reported immediately?
A. Minor dust generation
B. Fuel spill reaching a storm drain
C. Temporary puddles
D. Grass growth
Answer: B
Rationale:
Fuel entering a storm drain poses immediate environmental risk and requires prompt response.
Question 9
Which BMP provides perimeter sediment control?
A. Check dam
B. Silt fence
C. Mulching
D. Hydroseeding
Answer: B
Question 10
Walmart-Stormwater Practice Exam 2026
Edition 100 Advanced Questions with
Answers and Detailed Rationales
Part 1 (Questions 1–25)
Question 1
Which federal law established the foundation for stormwater pollution regulation in the United
States?
A. Resource Conservation and Recovery Act (RCRA)
B. Clean Water Act
C. Safe Drinking Water Act
D. CERCLA
Answer: B
Rationale:
The Clean Water Act established the framework for regulating pollutant discharges into waters
of the United States and later led to the NPDES permitting program.
Question 2
Construction activities disturbing at least how many acres generally require NPDES permit
coverage?
A. 0.25 acre
B. 0.5 acre
C. 1 acre
D. 5 acres
Answer: C
, Walmart-Stormwater Practice Exam
Rationale:
Federal regulations generally require permit coverage for construction disturbing one acre or
more (or part of a larger common plan).
Question 3
The primary purpose of a Stormwater Pollution Prevention Plan (SWPPP) is to:
A. Increase construction productivity
B. Prevent pollutants from leaving the site
C. Reduce construction costs
D. Document employee attendance
Answer: B
Rationale:
A SWPPP identifies pollutant sources and describes Best Management Practices (BMPs) used to
minimize pollutant discharge.
Question 4
Which pollutant is typically the greatest concern from construction sites?
A. Chlorine
B. Sediment
C. Mercury
D. Nitrogen gas
Answer: B
Rationale:
Sediment is the most common pollutant generated from disturbed construction areas.
Question 5
, Walmart-Stormwater Practice Exam
Which BMP controls erosion rather than sediment?
A. Silt fence
B. Inlet protection
C. Temporary seeding
D. Sediment basin
Answer: C
Rationale:
Temporary vegetation prevents soil from eroding rather than trapping sediment after erosion
occurs.
Question 6
A silt fence is primarily designed to:
A. Divert groundwater
B. Filter sediment from runoff
C. Prevent flooding
D. Stop rainfall
Answer: B
Rationale:
Silt fences intercept sheet flow and trap sediment before runoff leaves the site.
Question 7
Concrete washout water should be:
A. Discharged into storm drains
B. Pumped into nearby streams
C. Contained in a designated washout area
, Walmart-Stormwater Practice Exam
D. Mixed with soil
Answer: C
Rationale:
Concrete washout is highly alkaline and must be properly contained.
Question 8
Which activity should be reported immediately?
A. Minor dust generation
B. Fuel spill reaching a storm drain
C. Temporary puddles
D. Grass growth
Answer: B
Rationale:
Fuel entering a storm drain poses immediate environmental risk and requires prompt response.
Question 9
Which BMP provides perimeter sediment control?
A. Check dam
B. Silt fence
C. Mulching
D. Hydroseeding
Answer: B
Question 10
