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b. Climate The city of San Leandro is located in Zone 17, a climate zone dominated by marine influence. Inland air exerts an influence as well but to a much lesser degree. The climate is mild without extreme high or low temperatures and is characterized by cool, wet winters and cool, dry summers with fog or wind. Droughts occur regularly in this region. Most of the area receives regular afternoon wind in the summertime. Therefore, appropriate trees must be selected not only on their ability to withstand drought, but also on their potential to grow large and strong enough to withstand and block winds. c. Soil The Soil Conservation Service identifies the soils of San Leandro in their 1981 Alameda County soil survey. The western portion of San Leandro soils consist of silty clay loams. These flood plain soils are poorly drained as well as extremely saline in some areas. Also found in the western portion of San Leandro are very deep, poorly drained, moderately alkaline silt loams. The water table of these soils is below a depth of six feet. East of the Nimitz Freeway are well drained, neutral clay loams. Water intake and permeability of these soils are slow, favoring deep rooting tree species. The information presented above has allowed the City to select trees that are ecologically and physically appropriate for the function to be performed in the planting space available. To ensure site suitability, trees will be sited with careful consideration to their eventual size and form. Large canopy, deep -rooting trees will be selected where space permits to maximize environmental and aesthetic benefits. Street trees will include drain pipes to facilitate deep rooting. Finally, a diversity of tree species will be advocated on neighborhood streets and within the park and school sites to achieve urban forestry and aesthetic benefits. 2. Plant Establishment and Long -Term Maintenance. The City of San Leandro Public Works Department, Landscape Maintenance Division, has enhanced and maintained an urban forest of 25,000 public trees for the last 35 years. The following table show current staffing levels for tree trimming: Crew 1 Tree Trimming (1) Tree Trimmer (1) Tree Trimmer I Aerial Bucket Truck/Chipper Crew 2 Tree Trimming II (1) Tree Trimmer (1) Tree Trimmer I Towable Lift Truck/Chipper Crew 3 Tree Trimming II (1) Tree Trimmer II (1) Tree Trimmer I Aerial Bucket Truck/Chipper The City also employs a groundkeeping staff who are trained in the pruning and Page 8