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<br />from nuisance flows. Nuisance flows is defined as runoff that <br />occurs during periods that are not usually associated with <br />rainfall¡ and are most commonly produced from landscaping <br />irrigation, leaking pipes¡ and water used to wash off surfaces <br />tributary to the street. Since nuisance flows usually originates <br />in the street¡ they commonly contain many common pollutants <br />found in streets such as oil and grease and sediment. Such <br />impacts could potentially be in conflict with water quality <br />standards established by the State Regional Water Quality <br />Control Board. Additionally, surface water runoff generated from <br />the project site during construction operations could be <br />degraded potentially resulting in adverse water quality impacts <br />to downstream receiving waters. <br /> <br />To reduce potential water quality impacts to a level considered <br />less than significant the following mitigation measure shall be <br />implemented. <br /> <br />Mitigation Measures <br /> <br />. <br /> <br />Prior to the issuance of grading permits, the project <br />applicant shall provide proof of coverage under NPDES <br />General construction Activity Storm Water Permit, which <br />includes a copy of the project permit number and two copies <br />of the Storm Water Pollution Prevention Plan. <br /> <br />. <br /> <br />Prior to the issuance of grading permits, the project <br />applicant shall prepare an NPDES post-construction storm <br />water management plan per Orange County Drainage Area <br />Management Plan (DAMP) that includes all structural and <br />non~structural Best Management Practic~s for the project. <br /> <br />a. <br /> <br />Submit and have approved a surface <br />plan to include all structural <br />Practices. <br /> <br />drainage/utility <br />Best management <br /> <br />b. Provide two copies of the Water Quality Management Plan <br />(WQMP) that includes a description of all-applicable <br />Structural and Non-Structural Best Management Practices, <br />which would apply to this project. <br /> <br />. <br /> <br />Prior to issuance of grading permits the project <br />applicant shall receive approval of NPDES Permit for the <br />State ~.e9ional Wate1.- Quality Contx.ol Board fo1.- proposed <br />onsite dewatering operations. <br /> <br />15 <br /> <br />31a1\2jä <br />