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PX1000305 ( SA ) Project a 3 23 January 2020 San Joaquin County Industrial Storm Water General Permit Storm water discharges associated with industrial sites must comply with the regulations contained in the Industrial Storm Water General Permit Order No . 2014 7 - WO . For more information on the Industrial Storm Water General Permit , visit the Central Valley Water Board website at : ht : // waterboards ca ov/centr lv Iley/water issues/storm ester/industrial ener ( permits/in x . st I Dewa i r it 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 Risk GeneralOrder) 2003 - 0003 or the Central Valley Water Board ' s Waiver of Report of Waste Discharge and Waste Discharge Requirements ( Low Risk Waiver) 5 -2013 - 0145 . 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 Risk General Order and the application process , visit the Central Valley Water Board website at : http : //www . waterboards . ca , .qov/board decisions/adopted orders/water quality/200 3/ww o/Wgo2003 - 0003 . pdf For more information regarding the Low Risk Waiver and the application process , visit the Central Valley Water Board website at : http : //www . waterboards . ca . gov/centraIvaIley/board decisions/adopted orders/waiv ers/r5 -2013 - 0145 res . pdf Limited Threat n r l 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/centraIvaIley/board decisions/adopted orders/qen eral orders/6 -2016 - 0076 - 01 . pdf Municipal Permits ® The Phase I Municipal Separate Storm Water System ( MS4 ) Permit covers medium sized Municipalities ( serving between 100 , 000 and 250 , 000 people) and large sized municipalities (serving over 250 , 000 people) . The Phase II MS4 provides coverage for small municipalities , including non -traditional Small MS4s , which include military bases , public campuses , prisons and hospitals .