SR 05:031 - Laserfiche WebLink

A preliminary geotechnical analysis for the proposed development, "Planning/Develop- ment Level Geologic and Geotechnic Investigation, Kottinger Hills, Pleasanton, Califor- nia'', was prepared by Frank Groffie, Principal Geologist, of Berlogar Geotechnical Con- sultants. The report identified the locations of landslides, a geotechnical constraints free zone, preliminary mitigation measures, etc., for the subject property and proposed devel- opment. The preliminary report, however, did not address the provision of swales and detention ponds. The preliminary geotechnical report would be peer-reviewed by a City- selected geotechnical consultant. X May be Insignificant Insignificant Significant if Mitigated 3.04 Air Quality Impacts (Emissions, Odors, Change in Microclimate, etc.): The residential development of the Lin property would result in incremental increases in emissions due to building heating/cooling, fireplace operation, vehicular usage, etc. In addition, there would be temporary increases in dust and vehicular emissions during the initial construction phases, e.g., rough site grading, of the project's initial development and then during later construction phases, e.g., finished site grading of the individual building lots. All grading and construction activity on the site would be subject to dust control measures to reduce potential conflicts with nearby residential developments and residential properties. X May be Insignificant Insignificant Significant if Mitigated 3.05 Water Related Impacts (Runoff, Flood Hazard, Quality and Quantity of Surface and Ground Waters): The Lin property is covered by ephemeral creeks, swales, and gullies. Typically, where proposed development adjoins a cheek channel, riparian area, swale, etc., the San Fran- cisco Bay Area Regional Water Quality Control Board (RWQCB), has required a 100- foot setback between the proposed development - typically determined to be any change from existing topography - and a creek channel's top-of-bank. The proposal would re- quire review and comment from responsible outside agencies including the United States Army Corps of Engineers, the California Department of Fish and Game, and the RWQCB. The proposed project would have an increase in the hard-surface areas, e.g., paving and buildings. Urban pollutants, typical of that found in similar residential developments in the City, would be introduced to the surface runoff from the site. Drainage system im- provements, including the construction of vegetative filter swales and stormwater deten- PUD-S3, Initial Study Page 5 of l I December 4, 2003