In the coming months, six newly-permitted MS4 programs will begin implementation of the Construction Site Runoff
Control and Post-Construction Stormwater Management Minimum Control Measures (MCMs) required in their permits.
These MCMs require that each MS4 develop, implement, and enforce a program to reduce pollutants in stormwater
runoff from land-disturbing activities. Each program must include provisions for the review of Stormwater
Pollution Prevention Plans (SWPPPs) for construction activities occurring within their jurisdiction. On the
dates noted below, SWPPPs and applications for construction activities must be submitted to the MS4s and receive
approval from them prior to DHEC's issuance of coverage under the NPDES Construction General Permit. For
projects located in Beaufort County, requests for NPDES Construction permit coverage and Coastal Zone
Consistency (CZC) Certification can be submitted to DHEC concurrently with application to the MS4 should this be
necessary to expedite permitting times.