Construction sites in Chino must implement erosion and sediment control Best Management Practices (BMPs) under the San Bernardino MS4 Permit (Order R8-2010-0036), California Building Code Appendix J (grading), and — for sites disturbing 1 acre or more — the statewide Construction General Permit (Order 2022-0057-DWQ). BMPs must keep sediment, concrete slurry, and construction debris out of Chino's storm drains and creeks year-round, with intensified controls during the October 1 – April 30 wet season.
Chino Code Compliance and Engineering inspectors enforce site-specific erosion control plans submitted with grading permits. Required BMPs typically include perimeter silt fence or fiber rolls, stabilized construction entrances (rock pad), inlet protection on every adjacent storm-drain inlet, concrete washout containment, covered material stockpiles, dust suppression, and revegetation or hydroseed of disturbed areas. Sites of 1 acre or more must obtain coverage under the State Construction General Permit, file a Notice of Intent through the SMARTS system, designate a Qualified SWPPP Developer (QSD) and Qualified SWPPP Practitioner (QSP), and prepare a Stormwater Pollution Prevention Plan with risk-level-appropriate sampling. Wet-season inspections (October–April) require pre-storm, storm-event, and post-storm checks. California Building Code Appendix J (adopted by Chino under Title 15) sets minimum cut/fill slope ratios (typically not steeper than 2:1) and requires erosion control on slopes and disturbed surfaces. Discharging sediment-laden runoff or concrete washwater into a Chino storm drain is an illicit discharge.
Stop-work orders for unpermitted grading or missing BMPs. Administrative citations under Chino Municipal Code Title 1 (typical schedule $100 first / $200 second / $500 third per Cal. Gov. Code §36900). State Water Board administrative civil liability for Construction General Permit violations: up to $10,000 per day plus $10/gallon of unauthorized discharge per Cal. Water Code §13385. NPDES violations can also be pursued criminally for knowing endangerment.
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Chino, CA
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