NPDES Level 1A Practice Test

A slope gradient of 25% (4:1) would indicate that in a horizontal length of 100 feet, the vertical rise would be ______ feet.

A) 2.5

B) 12.5

C) 25

D) 4

C) 25

As rain falls to the earth, what is the very first function of vegetation?

A) It reduces detachment

B) It increases infiltration

C) It absorbs rain drop impact

D) Roots hold soil in place

A) It reduces detachment

Because of the likelihood of thunderstorms which is the worst month to schedule land disturbing activities?

A) April

B) July

C) September

D) October

B) July

Which of the following is not a stage in Erosion and Sedimentation?

A) Detachment

B) Solubility

C) Transport

D) Deposition

B) Solubility

At what depth must sediment be removed from a silt fence barrier?

A) 12 Inches

B) 16 Inches

C) 1/4 full

D) 1/2 full

D) 1/2 full

When straw mulch is used to cover disturbed soil it must be maintained at a depth of ________ inches.

A) 1-2

B) 1-3

C) 2-3

D) 2-4

D) 2-4

If it is necessary to wash vehicle tires to remove excess sediment, the sediment run-off must be:

A) Kept at the construction exit pad

B) Filtered with hay bales

C) Directed away from the road with a diversion

D) Directed into an approved sediment trap or sediment basin

C) Directed away from the road with a diversion

The maintenance requirements for all BMPs are only found in the Field Manual for Erosion and Sediment Control in Georgia.

A) True

B) False

A) True

All land-disturbing activities covered by the E & SC Act must first secure a Land Disturbing Activity (LDA) Permit. Who is responsible for obtaining this permit?

A) Design Engineer

B) Building Contractor

C) Owner/ Operator

D) Utility Subcontractor

C) Owner/ Operator

If the local issuing authority's enforcement officer observed a significant amount of sediment entering state waters from a land disturbing activity the officer should do which of the following?

A) Issue a strongly worded Notice of Violation

B) Start proceedings for Forfeiture of Bonding

C) Move to revoke the company's business license

D) Issue a Stop Work Order

D) Issue a Stop Work Order

Spillway pipe for a temporary sediment basin cannot be constructed with a pipe smaller than _____ inches.

A) 6

B) 8

C) 10

D) 12

B) 8

What is the amount of over fall allowed at the end of the storm drain outlet apron?

A) 1/2 the diameter of the rip rap used

B) Not to exceed 6 inches

C) 1/2 the thickness of the apron

D) Zero

D) Zero

What size rocks should be used to fill gabion boxes?

A) 3 to 4 inches

B) 4 to 8 inches

C) Larger than 8 inches

D) Clean aggregate

C) Larger than 8 inches

A diversion constructed of compacted soil can be positioned ________ a slope.

A) Above

B) Across

C) Below

D) All of the above

B) Across

A temporary sediment basin's riser pipe must be anchored with a concrete foundation. The minimum thickness allowed for this foundation is ________ inches.

A) 12

B) 18

C) 24

D) 32

B) 18

A temporary down drain structure using a 12 inch pipe could drain up to ________ acres.

A) 0.3

B) 0.5

C) 0.4

D) 1.0

D) 1.0

A retrofit utilizing a slotted board dam can be used on projects with a larger drainage area than a retrofit utilizing perforated half round pipe.

A) True

B) False

B) False

A stream channel diversion can only be constructed on streams with a drainage area less than _________ acres.

A) 830

B) 725

C) 640

D) 500

C) 640

What may be used to construct a grade stabilization structure?

A) Rock

B) Cement

C) Wood

D) All of the above

D) All of the above

The apron for a storm drain outlet is designed to accommodate the storm water flow but the minimum length is ______ times the outlet pipe diameter.

A) 4

B) 5

C) 6

D) 8

C) 6

In jurisdictions where there is a local issuing authority (LIA) one NOI is submitted to the LIA and a second NOI is submitted to whom?

A) Nation Resource Conservation Service (NRCS)

B) Georgia Soil & Water Conservation Commission (GSWCC)

C) Department of Natural Resources (DNR)

D) Environmental Protection Division (EPD) District Office

D) Environmental Protection Division (EPD) District Office

When the entire project has undergone final stabilization the permittee must notify the EPD with which of the following?

A) A notarized statement of completion

B) A notarized statement of completion and a complete set of photographs of the project site

C) A Notice of Termination (NOT)

D) An affidavit from the LIA inspector stating that the project plan was complied with

C) A Notice of Termination (NOT)

Under an ES & PC Plan, how often should an inspection occur in areas where petroleum products are stored, used, or handled?

A) Daily

B) Weekly and after rainfall greater than 0.5 inches

C) Bi-monthly

D) Monthly

A) Daily

The components of an adequate erosion, sedimentation and pollution control plan around found in Part ______ of the General Permit.

A) 1

B) 2

C) 3

D) 4

C) 3

A buffer zone is required along the banks of state waters. How is it determined where to measure from on the stream bank?

A) From the center of the channel

B) From the area of wrested vegetation

C) From the area adjacent to the stream that is subject to overflow, as indicated by water loving plants

D) From the water side edge of plants growing in the water

B) From the area of wrested vegetation

The minimum buffer for a warm water stream is ______ feet.

A) 15

B) 25

C) 35

D) 50

B) 25

A single temporary sediment basin may not be utilized for a drainage area larger than ______ acres.

A) 225

B) 167

C) 150

D) 120

C) 150

A temporary sediment basin shall be designed by whom?

A) A certified design professional

B) The property owner/ operator

C) A person certified at Level 1A or 1B by GSWCC

D) A building inspector

A) A certified design professional

Only Geotextile material may be used as a filter under the apron of a storm drain outlet.

A) True

B) False

A) True

What is the purpose of a level spreader?

A) Discharges concentrated runoff at a non-erosive velocity

B) Diverts storm water into a stabilized channel

C) Filters sediment from storm water and release it as sheet flow

D) Conveys storm water down the face of a cut and fill slope

C) Filters sediment from storm water and release it as sheet flow

BMP

Best Management Practices

COE

US Army Corps of Engineers (Federal)

CWA

Clean Water Act (1972)

DNR

Department of Natural Resources (Federal)

EPA

Environmental Protection Agency (Federal)

EPD

Environmental Protection Division (State)

ES & PC Plan

Erosion, Sedimentation and Pollution Control Plan

FEMA

Federal Emergency Management Agency (Federal)

GESA

Georgia Erosion and Sediment Control Act (1975)

GSWCC

Georgia Soil & Water Conservation Commission

LDA

Land Disturbing Activity (Permitted by LIA or EPD)

LIA

Local Issuing Authority (Inspect/Enforce) Need MOA to review plans

MLRA

Major Land Resource Areas

NOI

Notice of Intent (Application for NPDES permit)

NOT

Notice of Termination (To end NPDES permit)

NPDES

National Pollution Discharge Elimination System

NTU

Nephelometric Turbidity Unit

O.C.G.A.

Official Code of Georgia Annotated

SWCD

Soil and Water Conservation District (State)

USDA

United States Department of Agriculture (Federal)