BMP Reviewer Re-certification Exam

1. The MDC were created by:

a. A team of stakeholders including design consultants, local government engineers, professors, environmental groups, developers, DOT staff, DENR staff, a soil scientist, a landscape architect.
b. By DENR in an isolated state conference room.
c. By the Professional Engineers of North Carolina.
d. By the NC General Assembly.

2. The new term for “Best Management Practice” is:

3. Which of the following statements about Minimum Design Criteria (MDC) is NOT true:

a. The MDC are design standards that ensure that a stormwater practice functions in perpetuity, protects water quality standards, and removes pollutions.
b. The MDC must be followed immediately.
c. The MDC apply regardless of the geographical location of the stormwater practice.
d. The MDC apply regardless of the stormwater program requirements to which a stormwater practice is subject.

4. Designers may use the MDC now to meet the requirements of a state-issued permit shall be if:

a. The DEMLR director grants permission for a specific project.
b. The designer combines the MDC with standards in the current BMP Manual, picking the design standards he/she prefers.
c. The designer provides a lengthy explanation as to why he/she wishes to follow the MDC.
d. The applicant increases the permit application fee.
e. All of the General MDC as well as device-specific MDC are met.

5. The MDC were developed because:

6. According to the MDC, SCMs that are designed to infiltrate may be sited in or on:

7. After construction, SCMs that are impacted by sediment and erosion control should be:

8. According to the MDC, Infiltration System designs shall include all of the following EXCEPT:

9. According to the MDC, a bioretention cell planting plan shall be based on:

a. Providing 400 stems per acre.
b. Achieving 50 percent coverage with either canopy, ground cover or a combination of canopy and ground cover at 5 years after planting for tree/shrub cells.
c. Providing at least 10 different species of plants.
d. Preventing cattails from taking over.

10. According to the MDC, bioretention cells should include an underdrain with an upturned elbow for internal water storage unless:

11. Which of the following statements about the wet pond MDC is NOT correct:

a. The forebay and main pool shall have a minimum sediment storage depth of six inches.
b. A trash rack or other device shall be provided to prevent large debris from entering the outlet system.
c. The Hydraulic Retention Time method may be used instead of the SA/DA tables for sizing the wet pond.
d. The vegetated shelf shall be a minimum of 10 feet in width.

12. According to the MDC, the maximum ponding depth for a stormwater wetland is:

13. According to the MDC, which of the following is the correct specification for the shallow water zone of a stormwater wetland?

a. It should be six to nine inches deep and should comprise about 50 percent of the wetland area.
b. It should be zero to twelve inches deep and should comprise about 30 percent of the wetland area.
c. It should be three to twelve inches deep and should comprise about 40 percent of the wetland area.
d. It should be zero to nine inches deep and should comprise about 40 percent of the wetland area.

14. According to the MDC, a level spreader-filter strip that receives flow directly from the drainage area shall be sized based on:

a. The flow rate during the 0.75 inch per hour storm, with a flow bypass system for larger storm events.
b. The flow rate during the 1.0 inch per hour storm, with a flow bypass system for larger storm events.
c. The flow rate during the 25 year storm event.
d. The capacity of the blind swale.

15. The MDC for permeable pavement require all of the following EXCEPT:

a. A washed stone base.
b. A permeable pavement course with a demonstrated infiltration system rate of at least 200 inches per hour.
c. An observation well.
d. A soil subgrade surface with a slope of two percent or less (level).

16. According to the sand filter MDC, the required storage volume of the sediment and sand chambers shall be determined by:

17. The pollutant removal swales MDC require:

18. According to the MDC for green roofs, which of the following statements is correct:

a. The maximum rainfall depth that can be treated in a green roof is 1.0 inch.
b. The planting plan shall be designed to achieve a 90 percent cover within 2 years.
c. The green roof shall be less than two percent slope (level).
d. The design volume shall equal the media depth times the plant available water (PAW).

19. The MDC for Disconnected Impervious Surfaces require that:

a. The maximum drainage area for a disconnected downspout shall be 200 square feet.
b. The vegetated receiving area shall have a slope of two percent or less (level).
c. New sites shall be tilled to six inches prior to vegetation establishment.
d. The vegetated receiving area for disconnected pavement shall be 20 feet in length.

20. The “Recommendations” in the MDC ____ required to be following in order to obtain a permit.