Laserfiche WebLink
SANTA ANA REZONE PROJECT <br /> INITIAL STUDYIMITIGATED NEGATIVE DECLARATION <br /> Less than <br /> Significant <br /> Potentially Impact with Less than <br /> Significant Mitigation Significant <br /> Environmental Issues Impact Incorporated Impact No Impact <br /> e) Conflict with or obstruct implementation of ❑ ❑ ® ❑ <br /> a water quality control plan or sustainable <br /> groundwater management plan? <br /> Environmental Evaluation <br /> Setting <br /> Project-related impacts related to water quality can generally occur over several different periods: <br /> • During the earthwork and construction phase,when the potential for erosion, siltation, and <br /> sedimentation would be the greatest; <br /> • Following construction, before the establishment of ground cover,when the erosion potential <br /> may remain relatively high; and <br /> • After project completion, when impacts related to sedimentation would decrease markedly but <br /> those associated with urban runoff would remain similar to existing conditions. <br /> National Pollutant Discharge Elimination System <br /> Under Section 402 of the Clean Water Act(CWA), the United States Environmental Protection <br /> Agency (EPA) has established regulations under the National Pollutant Discharge Elimination System <br /> (NPDES) program to control direct stormwater discharges from construction activities disturbing one <br /> acre or more of land. In California, the State Water Resources Control Board (State Water Board) <br /> administers the NPDES permitting program and is responsible for developing NPDES permitting <br /> requirements.The NPDES program regulates industrial pollutant discharges, which include <br /> construction activities. The State Water Board works in coordination with the Regional Water Quality <br /> Control Boards (RWQCBs)to preserve, protect, enhance, and restore water quality. The City is within <br /> the jurisdiction of the Santa Ana RWQCB. <br /> Short-term Construction <br /> Dischargers whose projects disturb 1 or more acres of soil (or whose projects disturb less than 1 acre <br /> but are part of a larger common plan of development that in total disturbs 1 or more acres), are <br /> required to obtain coverage under the General Permit for Discharges of Storm Water Associated with <br /> Construction Activity Construction General Permit Order 2009-0009-DWQ. Construction activity <br /> subject to this permit includes clearing, grading, and disturbances to the ground, such as stockpiling <br /> or excavation, but it does not include regular maintenance activities performed to restore the original <br /> line, grade, or capacity of the facility. To obtain coverage for discharges under the General <br /> fib FCS <br /> Ordinance No, N 5 uationa.sharepaint.i6m/sOesfPuhiicatfons5¢fShdfed ments/Pvhlicat{nn3fCliant(PN-IN)/0377/0327OU47/ISMND/03770047SantoAnaRa—Proje{tISMNo.6— <br /> Page 78 of 118 <br />