Stormwater BMP Inspection Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1.During a routine inspection of a stormwater best management practice
(BMP), what is the primary purpose of the inspection?
A. To estimate future construction costs
B. To verify that the BMP is functioning as designed and protecting water
quality
C. To determine property values
D. To assess traffic conditions
B. To verify that the BMP is functioning as designed and protecting water
quality
The primary objective of BMP inspections is to ensure the practice is
operating effectively, minimizing pollutant discharge, and meeting
regulatory and design requirements.
2. Which of the following is generally considered the first step before
beginning a BMP inspection?
A. Remove accumulated sediment
B. Review design plans, maintenance records, and previous inspection
reports
C. Replace damaged vegetation
D. Measure rainfall
,B. Review design plans, maintenance records, and previous inspection
reports
Reviewing available documentation helps inspectors understand the
intended function of the BMP and identify recurring maintenance issues
before conducting the field inspection.
3. Which pollutant is most commonly removed by stormwater BMPs?
A. Radioactive waste
B. Household garbage
C. Sediment
D. Natural gas
C. Sediment
Sediment is one of the most common pollutants in stormwater runoff, and
many BMPs are specifically designed to capture and retain it before
discharge.
4. Excessive sediment accumulation in a detention basin most directly
indicates that:
A. The outlet structure is oversized
B. Maintenance is needed to restore storage capacity
C. The basin should be abandoned
D. Rainfall has permanently decreased
B. Maintenance is needed to restore storage capacity
Sediment buildup reduces the available storage volume and diminishes the
effectiveness of the BMP, requiring periodic removal.
5. Standing water remaining in a bioretention cell several days after
rainfall most likely indicates:
,A. Excellent infiltration
B. Drainage or infiltration problems
C. Proper operation
D. Low rainfall
B. Drainage or infiltration problems
Extended ponding often suggests clogged soils, blocked underdrains, or
other conditions that prevent proper drainage.
6. During an inspection, erosion around an outlet structure primarily
suggests:
A. Excessive vegetation growth
B. High flow velocities or inadequate energy dissipation
C. Insufficient rainfall
D. Proper operation
B. High flow velocities or inadequate energy dissipation
Erosion near outlets often occurs when runoff exits the BMP too quickly or
without adequate stabilization measures.
7. Why is vegetation important in many stormwater BMPs?
A. It increases runoff velocity.
B. It filters pollutants, stabilizes soil, and promotes infiltration.
C. It prevents rainfall.
D. It eliminates maintenance requirements.
B. It filters pollutants, stabilizes soil, and promotes infiltration.
Healthy vegetation plays a critical role in pollutant removal, erosion
prevention, and improving infiltration performance.
8. Which inspection finding requires immediate attention?
, A. Healthy grass cover
B. Minor leaf litter
C. Blocked outlet preventing drainage
D. Uniform mulch layer
C. Blocked outlet preventing drainage
A blocked outlet can cause flooding, structural damage, and reduced
treatment performance, making prompt corrective action necessary.
9. The primary purpose of a sediment forebay is to:
A. Store drinking water
B. Capture coarse sediment before runoff enters the main BMP
C. Increase traffic flow
D. Generate electricity
B. Capture coarse sediment before runoff enters the main BMP
Sediment forebays reduce maintenance needs by trapping larger particles
before they reach the primary treatment area.
10. Which document should be completed after every BMP
inspection?
A. Vehicle maintenance log
B. Inspection report
C. Payroll record
D. Building permit
B. Inspection report
Inspection reports provide documentation of BMP condition, maintenance
needs, deficiencies, and regulatory compliance.
11. Trash accumulation within a BMP primarily affects:
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1.During a routine inspection of a stormwater best management practice
(BMP), what is the primary purpose of the inspection?
A. To estimate future construction costs
B. To verify that the BMP is functioning as designed and protecting water
quality
C. To determine property values
D. To assess traffic conditions
B. To verify that the BMP is functioning as designed and protecting water
quality
The primary objective of BMP inspections is to ensure the practice is
operating effectively, minimizing pollutant discharge, and meeting
regulatory and design requirements.
2. Which of the following is generally considered the first step before
beginning a BMP inspection?
A. Remove accumulated sediment
B. Review design plans, maintenance records, and previous inspection
reports
C. Replace damaged vegetation
D. Measure rainfall
,B. Review design plans, maintenance records, and previous inspection
reports
Reviewing available documentation helps inspectors understand the
intended function of the BMP and identify recurring maintenance issues
before conducting the field inspection.
3. Which pollutant is most commonly removed by stormwater BMPs?
A. Radioactive waste
B. Household garbage
C. Sediment
D. Natural gas
C. Sediment
Sediment is one of the most common pollutants in stormwater runoff, and
many BMPs are specifically designed to capture and retain it before
discharge.
4. Excessive sediment accumulation in a detention basin most directly
indicates that:
A. The outlet structure is oversized
B. Maintenance is needed to restore storage capacity
C. The basin should be abandoned
D. Rainfall has permanently decreased
B. Maintenance is needed to restore storage capacity
Sediment buildup reduces the available storage volume and diminishes the
effectiveness of the BMP, requiring periodic removal.
5. Standing water remaining in a bioretention cell several days after
rainfall most likely indicates:
,A. Excellent infiltration
B. Drainage or infiltration problems
C. Proper operation
D. Low rainfall
B. Drainage or infiltration problems
Extended ponding often suggests clogged soils, blocked underdrains, or
other conditions that prevent proper drainage.
6. During an inspection, erosion around an outlet structure primarily
suggests:
A. Excessive vegetation growth
B. High flow velocities or inadequate energy dissipation
C. Insufficient rainfall
D. Proper operation
B. High flow velocities or inadequate energy dissipation
Erosion near outlets often occurs when runoff exits the BMP too quickly or
without adequate stabilization measures.
7. Why is vegetation important in many stormwater BMPs?
A. It increases runoff velocity.
B. It filters pollutants, stabilizes soil, and promotes infiltration.
C. It prevents rainfall.
D. It eliminates maintenance requirements.
B. It filters pollutants, stabilizes soil, and promotes infiltration.
Healthy vegetation plays a critical role in pollutant removal, erosion
prevention, and improving infiltration performance.
8. Which inspection finding requires immediate attention?
, A. Healthy grass cover
B. Minor leaf litter
C. Blocked outlet preventing drainage
D. Uniform mulch layer
C. Blocked outlet preventing drainage
A blocked outlet can cause flooding, structural damage, and reduced
treatment performance, making prompt corrective action necessary.
9. The primary purpose of a sediment forebay is to:
A. Store drinking water
B. Capture coarse sediment before runoff enters the main BMP
C. Increase traffic flow
D. Generate electricity
B. Capture coarse sediment before runoff enters the main BMP
Sediment forebays reduce maintenance needs by trapping larger particles
before they reach the primary treatment area.
10. Which document should be completed after every BMP
inspection?
A. Vehicle maintenance log
B. Inspection report
C. Payroll record
D. Building permit
B. Inspection report
Inspection reports provide documentation of BMP condition, maintenance
needs, deficiencies, and regulatory compliance.
11. Trash accumulation within a BMP primarily affects:
