CA AB756

Requires the Department of Transportation, in consultation with the State Water Resources Control Board, Department of Toxic Substances Control, and Department of Fish and Wildlife, to develop a programmatic environmental review process to prevent 6PPD and 6PPD-quinone (tire wear chemicals toxic to aquatic life) from entering salmon and steelhead trout bearing surface waters.

Mandates a pilot project at Highway 101's crossing over San Mateo Creek in San Mateo by December 31, 2025, to study the effectiveness and cost-effectiveness of installing bioretention and biofiltration systems to eliminate discharge of 6PPD and 6PPD-quinone into surface waters.

Requires the Director of Transportation to submit a report to the Legislature by December 31, 2026, describing the department's strategy to eliminate 6PPD and 6PPD-quinone discharge, including a map of all locations where the department is likely to discharge stormwater into salmon or steelhead trout bearing surface waters.

Starting January 1, 2027, requires the department to annually install bioretention or biofiltration controls at 10 percent of identified locations for 10 years until all locations are treated where the department discharges stormwater into salmon or steelhead trout bearing surface waters.

Requires annual status reports to the Legislature by October 31 of each year through October 31, 2038, describing the department's progress in preventing discharge of 6PPD and 6PPD-quinone.