Vista, CA Environmental Rules: Erosion Control (2026)

060), with narrow exemptions for excavations or fills under 50 cubic yards, emergency work, cemetery graves, and utility trenching. 330 sets the design standards: exposed soils and slopes must be protected to the maximum extent practicable (MEP) with temporary and permanent BMPs consistent with the city's Stormwater Standards Manual, sediment must be retained on-site using berms, swales, ditches, vegetated filter strips or catch basins, and sediment control devices such as debris basins or desilting basins must be installed prior to or concurrent with initial grading and maintained throughout construction.

No earth or organic material may be deposited where it could wash into a stream, marsh, slough, lagoon or other body of standing water. During the October 1 to April 30 rainy season, grading is barred entirely unless the contractor has an approved Stormwater Quality Management Plan, has installed all erosion and sediment control devices before the rainy season begins, and has posted the required security with the City Engineer; temporary erosion control materials such as mulch, plastic sheeting, gravel bags or biologs must be kept on-site and ready for installation whenever the National Oceanic and Atmospheric Administration forecasts a 30 percent or greater chance of precipitation.

270 requires the permittee to post erosion control security equal to 100 percent of the estimated cost of the erosion control system, with at least 25 percent posted in cash, before any grading permit issues. The City Engineer administers and inspects the program and can issue a stop-work order or use posted security to complete corrective erosion work directly.