15 ATTACHMENT 9 - Laserfiche WebLink

Dan Sarich HortScience, Inc. 1 Sarich Property Tree Preservation Page 4 -l We cannot 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 upon the intensity of proposed site changes. j Evaluation of Impacts and Recommendations for Preservation J Appropriate tree retention develops a practical match between the location and intensity of construction activities and the quality and health of trees. The Tree Survey Forms were the reference point for tree condition and quality. Potential 1 impacts from construction were evaluated using the lot plan provided by Ruggeri- . Jensen-Azar & Associates, Pleasanton. These plans depicted an extension to the existing entry road, building pads for a new home and two additional buildings, driveways, and underground utilitites. Impacts to trees will occur in several ways. Grading may damage tree roots both directly through mechanical injury, and indirectly by altering soil structure, drainage, and biology. Using the site plan, the potential impacts from construction were assessed for ~~ each tree. The most significant impacts to trees would occur as the result of the following: ^ Grading to create level building pads. ^ Constructing of new entry road to the site, structures, driveways, and underground utilities. __~ Based upon our evaluation of these plans, we recommend the preservation of 165 of the 226 trees identified on the site. Preservation of these trees is predicated on creation of a Tree Protectio n Zone (see Tree Preservation 1 J Guidelines). `- We recommend removal for 62 trees. The re are 16 Heritage trees within this group (see table 2). Twenty of the 62 trees recommended for removal were in -~ poor condition. Table 2: Trees recommended for removal from the Sarich Property. l (Heritage Trees are shown in bold type) J Tree No. Species Size Reason (in.) J 2 Silver dollar gum 16 Poor suitability g Valley oak 16 Development impacts 10 Valley oak 15 Development impacts 11 Valley oak 23 Development impacts 12 Valley oak 17 Poor suitability 15 Blue oak 24 Development impacts J 16 Blue oak 18 Development impacts 17 Blue oak 14 Development impacts 18 Blue oak 28 Development impacts 24 Blue oak 19,14 Poor suitability 25 Blue oak 20,10 Poor suitability 26 Blue oak 7 Poor suitability 27 Blue oak 10 Poor suitability ,_, l J (continued on nex 5 t page) :i