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4 . CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD ( Staff Contact : Timothy O ' Brien , [ 916 ] 464 -4616 ) a . CONSTRUCTION STORMWATER PERMIT : A National Pollutant Discharge Elimination ( NPDES ) General Permit for Storm Water Discharges Associated With Construction Activities , Order No . 99 - 28 - DWQ , is required when a project involves clearing , grading , or disturbances to the ground such as stockpiling or excavation . Currently , construction activity that involves soil disturbances on construction sites five acres or greater or which part of a larger common plan of development or sale require a construction storm water permit . Because construction associated with the project will disturb more than five acres , the property owner needs to obtain permit coverage under the NPDES General Permit No . CAS000002 for Discharges of Storm Water Associated With Construction Activity . Before construction begins , the proponent must submit an NOI to comply with the permit to the State Water Resources Control Board , and a Stormwater Pollution Prevention Plan ( SWPPP ) must be prepared . The permitting requirement applies both that the excavation site and the processing facility . b . INDUSTRIAL STORMWATER PERMIT : Depending on the Standard Industrial Classification ( SIC ) code of the final project , compliance with the NPDES General Permit No . CAS000001 for Discharges of Storm Water Associated With Industrial Activities may be required . The SIC codes of activities requiring coverage are listed in the General Permit. In order to obtain coverage by the General Permit , the proponent must submit a Notice of Intent to comply with the permit ( NOI ) to the State Water Resources Control Board , and an SWPPP must be prepared . The permitting requirement applies both at the excavation site and the processing facility . c . SECTION 404 PERMIT : If the project will involve the discharge of dredged or fill material into navigable waters or wetlands , a permit pursuant to Section 404 of the Clean Water Act may be needed from the US Army Corps of Engineers . If a Section 404 permit is required by the Corps , the Board will review the permit application to ensure that discharge will not violate water quality standards . If the project requires surface water drainage realignment , the applicant is advised to contact the Department of Fish and Game for information on Streambed Alteration Permit Requirements . If a Section 404 permit is required , the proponent must apply to the Regional Board for a Water Quality Certification under Section 401 . d . DEWATERING PERMIT : The proponent may be required to file a Dewatering Permit covered under WDR ' s General order for Dewatering and Other Low Threat Discharges to Surface Water Permit , Order no . 5 - 00 - 175 ( NPDES CAG995001 ) . The following discharges may be covered by this permit provided they do not contain significant quantities of pollutants and are either ( 1 ) four months or less in duration , or (2 ) the average dry weather discharge does not exceed 0 . 25 million gallons per day ( mgd ) : ( 1 ) Well development water . ( 2 ) Construction dewatering . ( 3 ) Pump/Well testing . (4 ) Pipeline/tank ( 5 ) Pipeline/tank flushing or dewatering . ( 6 ) Condensate discharges . ( 7 ) Water supply system discharges . ( 8 ) Miscellaneous dewatering / low threat discharges . PA - 0400250 Conditions of Approval 6