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b. Pesticide Information Several different types of pesticides, herbicides and fumigants could be expected to be used in the project vicinity . This will depend on several factors : time of year, weather and type of pest infestation. At the time the chemicals are applied, other faccois must be considered. These include method of application, weather conditions, toxicity and whether the chemical is dust, granular or spray form. The above factors will also relate to how the chemical may affect humans as a result of chemical drift. Agricultural chemicals are classified as "restricted" and "non-restricted . " If restricted chemicals are used , the farmer must obtain a permit to apply the chemical . When issuing the permit, the San Joaquin County Agricultural Commissioner ' s office must consider several factors including proximity of residences, adjoining land uses, and wind direction. Restrictive pesticides would require a "Restrictive Materials" permit while non-restrictive pesticides, such as sulphur dust, would not require a permit . Examples of restricted pesticides include 2, 4-D, Paraquat, Simazine and Parathion . These are liquid herbicides or pesticides that can be applied either on the ground or aerially . Restricted soil fumigants ( injected 6-24 inches into the soil ) include Systox , Metholobromide and Telone. Other restricted pesticides used as grain bait are placed underground and used for rodent control . These include Aluminum Phosphide, Zinc Phosphide and Strychnine . $ The Deputy County Agricultural Commissioner indicated that most of the orchard applications in this area are applied with sprayer equipment attached to platforms that are pulled throughi the orchards. Very little aerial spraying by plane or helicopter is done with orchard crops . 9 The applicant stated that helicopter spraying was used for treating the sugar beet crop and that nearby a residents are notified when the spraying will be undertaken. 10 C . Soil Types Th U. S. Soil Conservation Service has identified two soil types on the project site. These include CL-CLear Lake clay hardpan substratum, and ST-Jacktone clay . The Clear Lake clay is considered prime agricultural soil and includes +/- 46 acres. The northern two-thirds of the project site is considered Clear Lake clay , while the southern one-third portion is Jacktone clay . Both soils present constraints relative to sewage and drainage systems as discussed in Section V.B. 2. Environmental Impacts Development of the project site would result in the conversion of +/-62 acres of agricultural land (net amount after deducting existing residences - approximately 4 . 5 acres) into urban uses. In 1986 the County Agricultural Report stated that 659 , 150 acres had been harvested compared to 686, 110 in 1985. Conversion of the project site would represent a . 0010 percent 18