National Pollutant Discharge
Elimination System (NPDES)
An NPDES Permit issued by the EPA or state agency is required whenever one or more
acre of land is disturbed by a construction process. Drilling an oil or gas well, building a
tank battery, and many other oil & gas activities are considered construction under the
NPDES rule.
Part of obtaining the NPDES Permit is preparing and maintaining a Storm Water Pollution
Prevention Plan (SWPPP).
Storm Water Pollution Prevention Plan (SWPP)
The SWPPP identifies specific Best Management Practices to be deployed at the construction
site. It includes a topographical survey to determine the flow of storm water from the site
along with a method of preventing polluted storm water leaving the site.
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