Reso 1997-086 to 090 - Laserfiche WebLink

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2. SCOPE OF WORK Tasks Conduct a reconnaissance of the site and immediate vicinity to identify surface water quality and drainage conditions. Characterize, map and describe the hydrographic conditions including delineation of watersheds, drainages and water bodies, springs and points of discharge. Describe how the drainage system relates to site water quality and ecological conditions. • Describe the nature, sequencing and timing of proposed grading. Identify any potential soil erosion hazards resulting from exposure of bare soils to wind and water erosion. Estimate worst -case silt loading in drainages during the construction grading phase and during long- term project occupancy. • Qualitatively assess and describe the peak storm water run-off from the development of the generally pervious site. • Describe the proposed storm water management system. In particular, identify any plans for stormwater detention on site and the means of sediment control both during construction and long-term operation. • Describe how proposed drainage system maintenance would occur, identifying who will have responsibility for maintenance. Identify environmentally acceptable (and unacceptable) drainage system maintenance techniques in relation to meeting water quality objectives. • Additional mitigation measures, if required, will be directed to storm water management and possibly alteration of proposed grading to reduce silt loads. • Describe requirements of Regional Water Quality Control Board National Pollutant Discharge Elimination System (NPDES) storm water pollution prevention permits. The site is sufficiently large to require such a permit for the proposed grading. Review provisions of the Storm Water Pollution Prevention Plan (SWPPP), if one is available. Discuss how unmitigated non -point pollutant discharges may conflict with water quality objectives of the Basin Plan, the City of San Leandro General Plan, and the East Bay Regional Park District . Using published reports of the U.S. Geological Survey, California Department of Water Resources, San Leandro General Plan, site geotechnical reports and others, describe groundwater conditions and trends at the site. Identify any wells and their uses; if possible, obtain and summarize their status. Identify any history or known sources of groundwater or surface water pollution from the site or vicinity that may affect the project. Describe impacts that the project's grading plan and residential development could have on groundwater quality. Identify mitigation, if required, to minimize impacts to groundwater systems. 23 of 37 Boulders Residential Development E/R