January 22 ESP 179 Hydro

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  • 1. ESP 179- Winter 2013 Hydrology and Water QualityJanuary 22, 2012 Instructor: Trevor Macenski

2. Email Questions EIR Assignment Only Review a Draft Environmental Impact Report It is ok if its a joint EIR/EIS document Thresholds Matrix Two EIRs Same Project Different Locations Compare and Contrast Matrix Worksheet-Kevin to provide ISMND Assignment- Group Project 8-10 4 project choices Presentation Changing Thresholds Question 3. Lecture Outline Review CEQA Checklist Questions Federal Clean Water Act CAs Porter-Cologne Water Quality Control Act RWQCBs 303d List Flood Hazards Impact Analysis Approach Groundwater and WSAs Sample Discussion and Analysis Extra Credit- Reminder 4. Hydrology and Water Quality Appendix G Checklist: Hydrology and Water Quality Water Quality Standards and Waste DischargeRequirements Groundwater: supply, recharge, concept of net deficit, Alter drainage patterns and result in erosion or siltation Alter drainage an result in flooding Exceed capacity of drainage systems Degrade water quality Place housing within 100 year flood hazard Structures that would impede flood flows Levee or Dam failure Inundation by seiche, tsunami, or mudflow 5. Appendix G: Checklist Questions Projects that discharge waste/storm water Projects that are using groundwater: Residential/Commercial/ Industrial/ Energy Projects that have large cut and fill. Redirecting water. 6. Projects that have largecut and fill. Redirectingwater.Projects that haveincrease impervioussurfaces. 7. Water Quality Standards Pursuant to the Federal Clean Water Act,water quality standards are "provisions ofState or Federal law which consist of adesignated use or uses for the waters ofthe United States and water qualitycriteria for such waters based upon suchuses. Water quality standards are toprotect the public health or welfare,enhance the quality of water and serve thepurposes of the Act." 8. Federal Clean Water Act The Clean Water Act (CWA)is the majorfederal legislation governing water quality. The objective of the CWA is to restore andmaintain the chemical, physical, andbiological integrity of the Nationswaters. Important applicable sections of the Act are asfollows: Section 301 prohibits the discharge of any pollutantby any person, except as in compliance with Sections302, 306, 307, 318, 402, and 404 of the CWA.Sections 303 and 304 provide for water-qualitystandards, criteria, and guidelines. 9. Federal Clean Water Act Section 401 requires an activity which may result ina discharge to waters of the United States to obtaincertification from the State. Certification is providedby the RWQCB. Section 402 establishes the National PollutionDischarge Elimination System (NPDES) a permittingsystem for the discharge of any pollutant (except fordredge or fill material) into waters of the UnitedStates. This permit program is administered by theRWQCB. Section 404 establishes a permit program for thedischarge of dredge or fill material into waters of theUnited States. This permit program is administeredby the U.S. Army Corps of Engineers (USACE) 10. CAs Porter-Cologne Water QualityControl Act Porter-Cologne Water Quality Control Act(California Water Code Section 13000, etseq.) provides the basis for water qualityregulation within California. The Act requires a Report of WasteDischarge to land or surface waters thatmay impair a beneficial use of surface orgroundwater of the State. In practice, these requirements are typicallyintegrated with the NPDES permitting process. 11. CAs Porter-Cologne Water QualityControl Act The State Water Resources Control Board (SWRCB) and thevarious RWQCBs throughout the State Water Quality Control Plans (Basin Plans). These plans establish water quality standards for particular bodies of water. California water quality standards are composed of three parts: the designation of beneficial uses of water water quality objectives to protect those uses implementation programs designed to achieve and maintain compliance with the water quality objectives. The RWQCB implements management plans to modify andadopt standards under provisions set forth in section303(c) of the Federal CWA and California Water Code(Division 7, Section 13240). Under Section 303(d) of the1972 CWA, the State is required to develop a list of waterswith segments that do not meet water quality standards. 12. RWQCBs The Porter-Cologne Water Quality Control Acttook effect on January 1, 1970. It combined theState Water Rights Board and the State WaterResources Control Board and created the nineRegional Water Boards: Region 1: North Coastal RWQCB Region 2: SF RWQCB Region 3: Central Coastal RWQCB Region 4: LA REWQCB Region 5: Central Valley RWQCB Region 6: Lahontan RWQCB Region 7: Colorado River RWQCB Region 8: Santa Ana RWQCB Region 9: SD RWQCB 13. 303 (d) List and TDMLs Total Maximum Daily Loads A total maximum daily load (TMDL) refers to the amount of a specific pollutant a river, stream, or lake can assimilate and still meet federal water quality standards as provided in the CWA. The SWQCBs 303(d) list is an EPA approved listof impaired water bodies in the State of California(2008-2010). The list includes a priority schedule for the development of TMDLs for each contaminant or stressor impacting the water body. The major source of pathogens are typically: septic wastewater treatment systems runoff from new urban development 14. National Flood Insurance Program The Federal Emergency Management Agency(FEMA) administers the National Flood InsuranceProgram (NFIP) FEMA issues flood insurance rate maps for communitiesparticipating in the NFIP. These maps delineate floodhazard zones for each project site. Executive Order11988 (Floodplain Management) addresses floodplainissues related to public safety, conservation, andeconomics. It requires: Avoidance of incompatible floodplain development; Consistency with the standards and criteria of the NFIP;and Restoration and preservation of the natural andbeneficial floodplain values. 15. Inundation Hazards Seiche- (saysh): a series of standing waves (sloshingaction) of an enclosed body or partially enclosed body ofwater caused by earthquake shaking. Seiche action canaffect harbors, bays, lakes, rivers, and canals. Tsunami- (soo-NAH-mee): a Japanese word that meansharbor wave; a sea wave of local or distant origin thatresults from large-scale seafloor displacements associatedwith large earthquakes, major submarine slides, orexploding volcanic islands. Typically generated by seismicor volcanic activity or by underwater landslides, a tsunamiconsists of a series of high-energy waves that radiateoutward like pond ripples from the area in which thegenerating event occurred. Folsom Dam- Video 16. Hydrology Precipitation Mean annual rainfall Drainage Manuals- City and County Specific 100-year storm event Soils Soil classification- NRCS Soil Surveys Hydrologic Soil Group Infiltration SCS runoff curve numbers Topography Surveying line elevations 17. Hydraulics Analysis Capture it: Do you have enough capacity? Retention Basin= Hold and release Detention Basin= Holds for evaporation and percolation Stormwater Cells= Percolation Urban Stormwater System Infrastructure capacity- StormCAD Discharge it: Does the river or stream have enough capacity? Pre and Post Project Flow modeling: HEC-RAS Modeling 18. Groundwater and RechargeAnalysis Groundwater Recharge? Large land development projectsLarge areas of impervious surfaces Recharge wells? Geotechnical Study Stormwater or Infrastructure Study Urban Water Management PlanHigh recharge area?Impaired water basin? 19. Groundwater Use and WSAs Vineyard Area Citizens (4 Approaches)1) Applicable to multi-phased projects requiring procurement of additional supply for each phase. EIR to indicate whether there likely would be arough regional balance between water supply anddemand by analyzing competing long-term waterdemands within the applicable region (e.g., therelevant water agency zone) and the potential effectof such competing demands on the projects abilityto obtain sufficient water.Example: Conversion from Agricultural Use to Residential Use 20. Groundwater and WSAs Cont. 2) The second approach is to demonstrate a reasonable likelihood that water will be available for the project from an identified source by other means. Such a demonstration could be supported by: A description of infrastructure proposed to connect the water supply to the project The scheduled timing for constructing such infrastructure a funding mechanism that is in place for the infrastructure construction And evidence that available supply will not be allocated to other competing development.Evidence of contractual or other rights to water supply would also support a demonstration that an identified source is reasonably likely to be availableExample: Prison Expansion, planned infrastructure. 21. Groundwater and WSAs Cont. 3) The third possible approach to CEQA compliance could beused in circumstances where it is not possible todemonstrate a reasonable likelihood that water fromidentified sources will be sufficient. In such circumstances, the EIR must identify: Potential sources of water The environmental impacts of relying on those sources The likelihood the identified sources will be available. Additionally, the EIR must disclose any uncertainty regarding the supply, and where uncertainty exists, identify possible replacement sources or alternatives to use of the anticipated water, discuss their environmental consequences, and identify mitigation measures to minimize each adverse impact.Example: Basin in overdraft. Now what? Water right acquisition? 22. Groundwater and WSAs Cont. 4) The Court also indicated that a fourth approach would be for the EIR to incorporate or rely on an existing urban water management plan (UWMP) provided the UWMP accounted for the expectednew demand of the development project at issue