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Kevin Swanson — - 2 - — 30 March 2007 Water Quality Certification - Wetlands If a U.S. Army Corp of Engineers (ACOE) permit is required due to the disturbance of wetlands, then Water Quality Certification must be obtained from the Regional Board prior to initiation of project activities. Section 401 of the federal Clean Water Act requires that the project proponent for any project that impacts surface waters of the United States (such as streams and wetlands) must request a 401 Water Quality Certification from the Regional Board. Water Quality Certification must be obtained prior to initiation of project activities. The proponent must follow the ACOE 404(b)(1) Guidance to assure approval of their 401 Water Quality Certification application. The guidelines are as follows: 1 . Avoidance (Is the project the least environmentally damaging practicable alternative?) 2. Minimization (Does the project minimize any adverse effects to the impacted wetlands?) 3. Mitigation (Does the project mitigate to assure a no net loss of functional values?) 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 . Dewaterinq Permit The proponent may be required to file a Dewatering Permit covered under WDRs General Order for Dewatering and Other Low Threat Discharges to Surface Waters 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): a. Well development water b. Construction dewatering c. Pump/well testing d. Pipeline/tank pressure testing e. Pipeline/tank flushing or dewatering f. Condensate discharges g. Water Supply system discharges h. Miscellaneous dewatering/low threat discharges If you have any questions about the storm water program, please call Dani Berchtold at (916) 464-4683. Additional information is available via the Internet at the Regional Board's Storm Water website http://www.swrcb.ca.govlstormwtrlindex.html. For more information W l I&MObAmT$an Jwquin\Miac Cor Swaine,29 Mai 07 dm