ms4 npdes permit compliance program

los angeles county, dept. of public works


Since 2007, CASC has provided Storm Water Quality compliance services and other permit assistance to the County of Los Angeles, Department of Public Works (LADPW). These services are in support of LADPW’s road, bridge, traffic signal, flood control, sewer, and water construction projects located throughout the county. CASC provides various support services including construction inspection, contract administration, training, SWPPP review, and project and program scheduling.

Our staff interacts with local, state, and federal regulatory agencies (including the LARWQCB) and assists in the implementation and enforcement of various NPDES permit requirements. 

Reports, Policies and Procedures, Reviews and Recommendations

  • CASC has prepared a variety of reports for the department and advises the department regardingnew or changed regulatory requirements, andhas been a major contributor in developing and editing the county’s stormwater Best Management Practices (BMP) Manual, SWPPP Preparation Manual, SWPPP template, Inspection Reporting form, BMP/SWPPP Staff Guide, and Stormwater Contract Special Provisions.

LADPW Staff Training

  • CASC assists in the development and delivery of LADPW employee and contractor environmental-related training programs.

SWPPP reviews

  • Our field staff assist in the implementation and enforcement of various NPDES permit requirements including storm water pollution prevention plan (SWPPP) reviews.

Field Compliance Inspections

  • Our field inspectors review construction sites, County facilities, and maintenance operations.  CASC has also been assigned to monitor environmentally related operations such as dewatering, excavation, and disposal of contaminated soil. 

We review implementation of Best Management Practices, monitor waste discharge requirements, and complete monitoring and reporting requirements. Field inspectors provide electronic copies of all correspondence and reports and include them in the project files and database.  Our field management team interacts with local, state, and federal regulatory agencies as necessary.