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General Plan Amendment No . PA e 2 m 24 January 2023 -2000217 , Zone Reclassification No . PA- 2200021 , Major Subdivision No . PA- 2000218 , Williamson Act Cancellation No . PA- 2200070 Project San Joaquin County The Basin Plan is subject to modification as necessary , considering applicable laws , policies , technologies , water quality conditions and priorities . The original Basin Plans were adopted in 1975 , and have been updated and revised periodically as required , using Basin Plan amendments . Once the Central Valley Water Board has adopted a Basin Plan amendment in noticed public hearings , it must be approved by the State Water Resources Control Board ( State Water Board ) , Office of Administrative Law ( OAL ) and in some cases , the United States Environmental Protection Agency ( USEPA) . Basin Plan amendments only become effective after they have been approved by the OAL and in some cases , the USEPA . Every three ( 3 ) years , a review of the Basin Plan is completed that assesses the appropriateness of existing standards and evaluates and prioritizes Basin Planning issues . For more information on the Water Quality Control Plan for the Sacramento and San Joaquin River Basins , please visit our website : http : //www . waterboards . ca . gov/centralvalley/water issues/ basin plans/ Ant degradation Considerations All wastewater discharges must comply with the Antidegradation Policy ( State Water Board Resolution 68 - 16 ) and the Antidegradation Implementation Policy contained in the Basin Plan . The Antidegradation Implementation Policy is available on page 74 at : https : //www . waterboards . ca . gov/centralvalley/water issues/ basin plans/sacslr 2018 05 . pdf In part it states : Any discharge of waste to high quality waters must apply best practicable treatment or control not only to prevent a condition of pollution or nuisance from occurring, but also to maintain the highest water quality possible consistent with the maximum benefit to the people of the State . This information must be presented as an analysis of the impacts and potential impacts of the discharge on water quality, as measured by background concentrations and applicable water quality objectives . The antidegradation analysis is a mandatory element in the National Pollutant Discharge Elimination System and land discharge Waste Discharge Requirements ( WDRs ) permitting processes . The environmental review document should evaluate potential impacts to both surface and groundwater quality . II . Permitting Requirements Construction Storm Water General Permit Dischargers whose project disturb one or more acres of soil or where projects disturb less than one acre but are part of a larger common plan of development that in total disturbs one or more acres , are required to obtain coverage under the General Permit for Storm Water Discharges Associated with Construction and Land