Cal. Code Regs. tit. 23 § 3927
Regional Board Resolution No. R-3-2002-0063, adopted on May 16, 2003 by the Central Coast Regional Water Quality Control Board (Regional Board), modified the regulatory provisions of the Water Quality Control Plan for the Central Coast Region (Basin Plan) by establishing Total Maximum Daily Loads (TMDLs) for Sediment in the San Lorenzo River, including Carbonera Creek, Lompico Creek, and Shingle Mill Creek, adopting numeric targets for sediment, and adopting an implementation plan to achieve the TMDLs.
This Basin Plan amendment establishes the TMDL for sediment in the San Lorenzo River at 306,139 tons/year; in Carbonera Creek at 11,728 tons/year; in Lompico Creek at 9,542 tons/year; and in Shingle Mill Creek at 857 tons/year. An implicit margin of safety was incorporated into the TMDLs through the use of conservative assumptions throughout the sediment source analysis and characterization of beneficial use impacts. The Regional Board also allocated the TMDLs, based on achievable reductions in sediment loading of up to 27 percent of current loads, to the major land use categories in the watershed. Through this Basin Plan amendment, the Regional Board adopted numeric targets for streambed sediment characteristics known to be supportive of the beneficial uses protecting anadromous fish. These numeric targets interpret narrative water quality objectives for sediment in the Basin Plan. The Regional Board will evaluate the TMDLs by monitoring numeric targets and tracking implementation actions. Implementation emphasizes the role of the Santo Cruz County Departments of Planning and Public Works, the Santa Cruz County Resource Conservation District, and other public and private groups to implement self-determined activities identified in the amendment language. By the end of the first year of implementation, the Regional Board and the implementing parties will establish a time schedule for completion of trackable implementation actions identified in the amendment language, or, staff will develop the schedule and present it to the Regional Board as a Basin Plan amendment. If, in future years, self-determined actions have not been completed, staff will develop a regulatory approach (rather than a self-determined approach) and present a revised implementation plan to the Regional Board as a Basin Plan amendment. The Regional Board scheduled a 25-year implementation period to achieve the TMDL. Revision of the TMDL, the numeric targets, or the implementation strategy would be considered through the Basin Plan amendment process.
Cal. Code Regs. Tit. 23, § 3927