Reso 2025-3788 - Laserfiche WebLink

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to a permitted facility for lawful disposal. The permittee has the option to confirm the contamination by means of state -approved water quality sampling and analytical methods. Dewatering effluent cannot be discharged into any structure connected to a public sanitary sewer system. (section 24.42-4 (2)(b)) The equipment used for regular maintenance and cleaning of stormwater and utility infrastructure must have its contents fully evacuated and the equipment shall be cleaned before being used for subsequent maintenance and cleaning operation in a system that is not within the responsibility of the same utility owner, or at a different project or construction site even when the new construction site has the same owner. The permittee must keep records of the dewatering activities performed as prescribed by the required Class V permit conditions and provide the records upon request to the Division of Environmental Resources Management staff. 3.2 Dewatering operations associated with emergency temporary flood protection ■ Class V permit must be obtained before the commencement of dewatering operations, in accordance with section 2.0 of this guidance. ■ The dewatering effluent must be pretreated for sediments, silt, and oils if the discharges are proposed into surface water, or a drainage system that is connected to an outfall or overflow structure. ■ The proposed point of discharge must have sufficient capacity to receive the proposed emergency effluent volumes, and the dewatering operation shall not cause water overflows, flooding, a worsening of the water quality in the receiving body of water, and/or other impact on adjacent properties. ■ The dewatering operation shall not result in the discharge of organic or inorganic matter into surface water, cause clogging of the existing drainage system by silt or sediments, or impair the functionality of the existing drainage system. The proposed activities and operation may not result in adverse impacts to natural resources, submerged lands, or the quality of surface waters, including but not limited to scouring, turbidity, or siltation. ■ The discharge point(s) must be monitored to identify any potential impact on water quality. The dewatering operation must be stopped immediately if such signs are observed. ■ Commencement of emergency dewatering operations as allowed under this section, must be immediately communicated to the Division of Environmental Resources Management staff for monitoring and follow-up. ■ Any deviations of the approved Class V conditions or locations must be immediately communicated to the Division of Environmental Resources Management staff for monitoring and follow-up. 4. Emergency dewatering activities. If an emergency dewatering is required to alleviate flooding, and a Class V permit has not been obtained, the Division of Environmental Resources Management, Water Control Section staff must be notified immediately. This notification must include the following information regarding the required dewatering operation: commencement of discharge, the location(s) of the dewatering activities, the number of deployed pumps, the point of discharge, discharge rates, and contact information for the personnel in charge. The best management practices listed in this policy must be followed and implemented during the emergency dewatering operations. Page 3 of 4