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actually connected, drainage water will be ponded on site. Beneficially, this would allow runoff water an opportunity to percolate, but negatively, it would also concentrate contaminants in a small area as water evaporates and percolates into the soil. Also standing water pumped into such a drainage area will precipitate a fine layer of silt as it stands and evaporates. This silt will prevent the rapid per- colation of water into the soil. If left standing this water could become an environmental aesthetic and health problem. Domestic water for the system will come from two deep wells installed on the site. The Stockton East Water District utilizes a house rate on the site. One well is a backup for emergencies and the other well is the major supplier of water for the subdivision. Well water is tested as to purity and does not require the installation of chlorination facilities. Whenever an individual system is shut down for repairs, some safeguard or precaution must be installed to prevent micro-organisms from entering the main water system. 3. Climatic conditions in the outdoor world will be un- affected by this subdivision. Energy use and climatic controls pertinent to indoor living will be discussed under the heading of Design Criteria Having Significant Social Impact, or Energy Impact. Indirectly, the project will have some affect upon the San Joaquin Air Basin. Vehicle exhaust emissions and burning hydro- carbons contribute to temperature and chemical changes that affect plant growth. Past experience has shown that there is no significant impact fm m a subdivision of this size except immediately adjacent to roadways where passing cars and trucks concentrate emissions and dust problems for plant life. Even immediately affected plants can be saved through various mitigation measures. Vehicles travelling to and from downtown Stockton travel about 2/3 of the distance required to reach other North Stockton subdivisions. As a result this subdivision would contribute less to polluting emissions than a new subdivision further from town or even 43 new units located in an existing sub- division further away. The economic level of home- owners will probably mean larger cars and more emissions. 4. Biotic conditions would definitely change. Native flora and fauna are practically non-existent at the present time. Walnut trees were an introduced specie. They are now 25-30 years old and are a healthy stand of trees according to Mr. Robert Cross of the County Department of Agriculture. The establishment of this subdivision will introduce a number of new plant species as residents seek to landscape their property. Ornamental -24-