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Site Approval PA - 2200038 Project - 4 - 17 January 2023 San Joaquin County https : //www , waterboards . ca . gov/board decisions /adopted orders /water quality/200 4 /wq o /wg o2004 - 0004 . pdf Dewatering Permit If the proposed project includes construction or groundwater dewatering to be discharged to land , the proponent may apply for coverage under State Water Board General Water Quality Order ( Low Threat General Order) 2003 - 0003 or the Central Valley Water Board ' s Waiver of Report of Waste Discharge and Waste Discharge Requirements ( Low Threat Waiver) 135 - 2018 - 0085 . Small temporary construction dewatering projects are projects that discharge groundwater to land from excavation activities or dewatering of underground utility vaults . Dischargers seeking coverage under the General Order or Waiver must file a Notice of Intent with the Central Valley Water Board prior to beginning discharge . For more information regarding the Low Threat General Order and the application process , visit the Central Valley Water Board website at : http : //www , waterboards . ca . gov/ board decisions/ adopted orders /water quality/2003 / wq o /wg o2003 - 0003 . pdf For more information regarding the Low Threat Waiver and the application process , visit the Central Valley Water Board website at : https : //www . waterboards . ca . gov/ centralvalley/ board decisions/adopted orders/waiv e rs / r5 - 2018 - 0085 . pdf Limited Threat General NPDES Permit If the proposed project includes construction dewatering and it is necessary to discharge the groundwater to waters of the United States , the proposed project will require coverage under a National Pollutant Discharge Elimination System ( NPDES ) permit . Dewatering discharges are typically considered a low or limited threat to water quality and may be covered under the General Order for Limited Threat Discharges to Surface Water ( Limited Threat General Order) . A complete Notice of Intent must be submitted to the Central Valley Water Board to obtain coverage under the Limited Threat General Order . For more information regarding the Limited Threat General Order and the application process , visit the Central Valley Water Board website at : https : //www . waterboards . ca . gov/centralvalley/ board decisions /adopted orders /gene ral orders / r5 - 2016 - 0076 - 01 . pdf NPDES Permit If the proposed project discharges waste that could affect the quality of surface waters of the State , other than into a community sewer system , the proposed project will require coverage under a National Pollutant Discharge Elimination System ( NPDES ) permit . A complete Report of Waste Discharge must be submitted with the Central Valley Water Board to obtain a NPDES Permit . For more information regarding the NPDES Permit and the application process , visit the Central Valley Water Board website at : https : //www . waterboards . ca . gov/ centralvalley/ help/ permit/