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The San Joaquin County Land-Use Map designates the site and its sur- <br /> roundings as general agriculture land (GA-40 zoning designation) . In <br /> addition to livestock grazing, several areas are developed for the <br /> cultivation of crops, chiefly grapes (see Figure 3) . Approximately 20 <br /> scattered residences exist within 1 mile of the site; the majority of <br /> those are located along either Tully Road or Harney Lane. Since most <br /> water-supply wells in the area are located adjacent to homes, the dis- <br /> tribution of residences corresponds generally to the distribution of <br /> wells (see Figure 3) . <br /> Since land use is predominantly agricultural , ground water is tapped <br /> mainly for irrigation purposes, with a smaller quantity supplying <br /> household needs. Barring an unexpected resurgence in farming activity <br /> in this portion of San Joaquin County, no increase in ground-water <br /> pumpage is expected. <br /> D. CLIMATE <br /> The site experiences a Mediterranean-type climate that is typical of <br /> that found in the northern San Joaquin Valley. Winters are cool and <br /> moist, while summers are hot and dry. The mean daily maximum tempera- <br /> ture in July and August is in excess of 90°F, with frequent daily <br /> highs over 100°F. January minimum temperatures average between 35 and <br /> 40°F, with maximum temperatures in the mid-50s. Rainfall is seasonal , <br /> with 90 percent of the precipitation occurring from October through <br /> May. The annual precipitation for the area averages between 14 and <br /> 16 inches per year according to the U.S. Geological Survey. Central <br /> Sierra Subregion isohyetal map. <br /> PJ9 9390206.00D <br />