NPDES Level 1A Practice Test 2026/2027 – 100+ Questions on BMPs, Soil Erosion, Sediment Control, Permit Rules & Georgia State Compliance

NPDES Level 1A Practice Test 2026/2027 – 100+ Questions on BMPs, Soil Erosion, Sediment Control, Permit Rules & Georgia State Compliance Spillway pipe for a temporary sediment basin cannot be constructed with a pipe smaller than _____ inches. A) 6 B) 8 C) 10 D) 12 - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -C) 640 What may be used to construct a grade stabilization structure? A) Rock B) Cement C) Wood D) All of the above - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -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 - ANSWER -C) 3