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John Miller Architects, Saint Elizabeth Seton Church Tree Report, June 2006 HortScience, Inc. Page 2 5. Rating the suitability for preservation as 'good', 'moderate' or "poor". Suitability for preservation considers the health, age and structural condition of the tree species, and its potential to remain an asset to the site for years to come. Good: Trees with good health and structural stability that have the potential for longevity at the site. Moderate: Trees with somewhat declining health and/or structural defects than can be abated with treatment. The tree will require more intense management and monitoring, and may have shorter life span than those in 'good' category. Poor. Trees in poor health or with significant structural defects that cannot be mitigated. Tree is expected to continue to decline, regardless of treatment. The species or individual tree may have characteristics that are undesirable for landscapes, and generally are unsuited for use areas. Description of Trees Twelve (12) trees potentially impacted by the proposed changes were included in the survey. Ten (10) of the 12 trees were in a row at the east edge of the empty field, adjacent to the parking lot. Some trees within the proposed area of work had diameters below 6', and were not included in the survey. The row included eight (8) young deodar cedars and two (2) London plane trees with diameters between 6' and 7". These trees were all in good condition, and appeared to be relatively new plantings, as most were still staked (Table 1, following page). The remaining two (2) trees were walnuts. A 27" diameter English walnut was growing at the southem end of the open field, and was in poor condition. It had dieback in the upper crown and trunk wounds from sun scald (Photo 1). A large, multi-stem Calif. black walnut was growing along the southem property line. The Calif. black walnut was in fair condition with minor twig and branch dieback. This was the largest diameter tree surveyed, with trunk diameters of 26", 22' and 14'. The city of Pleasanton defines any tree with a diameter of 18" or greater, or a multi-stem tree with cumulative diameter of 18" or greater, as "Heritage'. Only the two walnuts (#181 and 182) met these criteria. Photo 1: English walnut #181 was in poor condition. The tree had extensive twig and branch dieback in the upper crown and trunk wounds from sun scald (not shown).