I agree this is a convoluted one because of Calgreen and SWRCB requirements. SWRCB as a division of CalEPA follows the Clean Water Act NPDES rules.
NPEDS is a national program under the USEPA. Different states have authority to administer NPDES. California is authorized so the Cal EPA via State Water Resources Control Board administers the NPDES CGP and the SWPPS as part of the Clean Water Act as I understand it.
The NPDES Program is a federal program which has been delegated to the State of California for implementation through the State Water Resources Control Board (State Water Board) and the nine Regional Water Quality Control Boards (Regional Water Boards), collectively Water Boards. In California, NPDES permits are also referred to as waste discharge requirements (WDRs) that regulate discharges to waters of the United States.
http://www.swrcb.ca.gov/water_issues/programs/npdes/That said; Calgreen chapter 5 states:
5.106.1 Storm water pollution prevention plan. For newly
constructed projects of less than one acre, develop a Storm
Water Pollution Prevention Plan (SWPPP) that has been
designed, specific to its site, conforming to the State Storm
water NPDES Construction Permit or local ordinance, whichever
is stricter, as is required for projects one acre or more. The
plan should cover prevention of soil loss by stormwater run-off
and/or wind erosion, of sedimentation, and/or of dust/particulate
matter air pollution.
Note: Assistance with the permit may be obtained from the
California StateWater Resources Control Board (SWRCB)
at:
http://www.swrcb.ca.gov/stormwtr/, from a Regional
Water Quality
Bottom line---we are probably going to be more concerned with the non-residential Calgreen requirements for this exam so: For projects under 1 acre we need a SWPP. For projects over 1 acre we need a Construction General Permit that complies with NPDES or local ordinance whichever is more restrictive.
Corkscrewed wrote:You are correct. But just to clarify (cuz I missed the nuance initially when I was studying):
There is a difference between what CALGreen calls the SWPP (2 P's) and what the SWRCB requires, which is a SWPPP (3 P's).
CALGreen requires stormwater pollution prevention. Period. Lower case. Generic measures. These can be in the form of Best Management Practices or following guidelines of local jurisdiction when a project is under 1 acre.
However, when it is 1 acre or greater, a Stormwater Pollution Prevention PLAN is required. This is based on SWRCB requirements.
The confusion is that CALGreen decided to title this generic term SWPP. It would be the same thing if they'd called it something like "stormwater treatment measures" or such (which they do in the text, but I recall the heading saying SWPP).