18 ATTACHMENT 09 - Laserfiche WebLink

Arborist Report. Revised February 1.2017 HortScience, Inc The Village at Valley Trails. Ponderosa Homes Page 5 We consider trees with high suitability for preservation to be the best candidates for preservation. We do not recommend retention of trees with low suitability for preservation in areas where people or property will be present. Retention of trees with moderate suitability for preservation depends on the intensity of proposed site changes. Table 2. Tree suitability for preservation. The Village at Valley Trails.Pleasanton CA. High Trees with good health and structural stability that have the potential for longevity at the site, London planes#239,240,241;coast live oak#234 and Callery pear#238 wer rated as having high suitability for preservation Moderate Trees in fair health and/or possessing structural defects that may be abated with treatment Trees in this category require more intense management and monitoring,and may have shorter life-spans than those in the"high"category Coast redwoods#223—228,230,231, 233.244; Callery pears#235,236, 237.242,243;Chinese elm #245; Calif. pepper#246;silver maple#247,and sweetgum#252 were rated as having moderate suitability for preservation. Low Trees in poor health or possessing significant defects in structure that cannot be abated with treatment. These trees can be expected to decline regardless of management. The species or individual tree may possess either characteristics that are undesirable in landscape settings or be unsuited for use areas. Twelve(12)sweetgums and coast redwoods#229 and 232 had low suitability for preservation. Evaluation of impacts and Recommendations for Action Appropriate tree retention develops a practical match between the location and intensity of construction activities and the quality and health of trees. The tree assessment was the reference points for tree condition and quality. Impacts from the proposed project were assessed using the Preliminary Grading& Utility Plan prepared by RJA Associates (dated June 2016). The plan included lot, road and entry layouts. set-back information and tree canopies. The plan proposes to construct 37 new residential units. The existing church building, parking lot and landscaping would be demolished The existing entry location on Valley Trails Drive would be retained and connected to a new circular, interior road. The most significant impacts to trees would be associated with 1)demolition of existing building and parking lot and 2)grading. Several redwoods were located within proposed lots 30 to 36 Other trees were located just off-site along the project periphery.