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Individual. drainage ponds will provide stormwater runoff retention on each lot. This pond is usually a shallow area 6" to 12" deep. In otheti rural residential subdivisions in Morada, a shallow sweeping swale is %iced to convey water to the pond. This pond must be separate from the leach- field area and should not be filled in if it is to function properly. After the developer :sells the lots, the maintenance of the individual systems will devolve on the individual homeowner rather than a special district or the public. A 12 acre area comprising 8 lots is proposed as a reserve for possible expansion of East- view School, Under present legislation the school district would be required to purchase any portion of this reserve which it wishes to use. After January 1, 1978 State Legisla- tion becomes effective enabling the County to pass an Ordinance requiring that the developer provide fees or land for temporary classroom facilities. This law will not apply to this project. II DESCRIPTION OF THE ENVIRONMENTAL SETTING A. Geology Topography and Soil: 1. The project is in the Central Valley of California. This feature consists of a deep alluvium filled trough between two mountain ranges - the Coast Range to the west and the Sierra Nevadas to the east. These mountains were the source of the alluvium which lies under the site. The alluvial strata dips toward the west line approximately defined by the San Joaquin River. Successive strata increases in age with depth of the deposite and consist mainly of sands, gravels and clays. The surface consists of recent (Holocence) deposits (actually the very top soil layer would contain material deposited during the most recent flood) . The first layer is the Victor formation, about 1500' in depth, then Laguna formation which extends beyond the depth of well log data in this area. -4-