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PA- 1900061 ( UP ) Project - 2 - 6 September 2019 San Joaquin County 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/centraIvaIley/water issues/basin plans/ Antidegradation 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/centraIvaIley/water issues/ basin lans/sacs ' r 201 805 . 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 oh- twin ooveracge under the General Permit for Storm Water Discharges Associated with Construction Activities ( Construction General Permit) , Construction General Permit Order No . 2009 - 009 - DWQ . Construction activity subject to this permit includes clearing , grading , grubbing , disturbances to the ground , such as stockpiling , or excavation , but does not include regular maintenance activities performed to restore the original line , grade , or capacity of the facility . The Construction General Permit requires the development and implementation of a Storm Water Pollution Prevention Plan ( SWPPP ) . For more information on the Construction General Permit , visit the State Water Resources Control Board website at : http : //www , waterboards . ca . gov/water issues/programs/stormwater/constpermits . sht ml