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06
City of Pleasanton
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CITY CLERK
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AGENDA PACKETS
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2017
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011717
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06
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1/11/2017 4:34:02 PM
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CITY CLERK
CITY CLERK - TYPE
AGENDA REPORT
DOCUMENT DATE
1/17/2017
DESTRUCT DATE
15Y
DOCUMENT NO
06
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Tree assessment Hort Science, Inc <br /> Bonde Ranch City of Pleasanton Page 7 <br /> Recommendations <br /> Based on my observations and assessment, I recommend the following <br /> 1 Remove blue gums#141 and 157 which received risk rankings of 7 and 8 <br /> respectively <br /> 2 Prune or remove blue gum#142 which received a risk ranking of 8 Prune to <br /> reduce the upper crown that is bowed towards the residence <br /> 3 Prune blue gum #159 which received a risk ranking of 8 The central leader was <br /> lost high in the crown As a result, sections of the upper canopy bow to the <br /> south, over the property line and residence The problematic stems could either <br /> be removed or reduced in length <br /> 4 Continue the program of pruning trees along the property line Rather than <br /> cutting branches at the property line, however, remove branches at their point of <br /> origin Include reduction of stems that are bowed towards back yards and <br /> residences in pruning specifications <br /> Our procedures focus on trees with observable defects This is not to say that trees <br /> without significant defects will not fail Failure of apparently defect-free trees does occur, <br /> especially during storm events Wind forces, for example, can exceed the strength of <br /> defect-free wood causing branches and trunks to break Wind forces coupled with rain <br /> can saturate soils, reducing their ability to hold roots, and blow over defect-free trees <br /> Although we cannot predict all failures, identifying those trees with observable defects is <br /> a critical component of enhancing public safety <br /> Furthermore, trees change over time Our inspections represent the condition of the tree <br /> at the time of inspection Annual tree inspections are recommended to identify changes <br /> to tree health and structure In addition, trees should be inspected after storms of <br /> unusual severity to evaluate damage and structural changes <br /> Thank you for the opportunity to assess these trees If you have any questions, please <br /> feel free to contact me I look forward to hearing from you <br /> Sincerely, <br /> !_yiLt___, <br /> James R Clark, Ph D <br /> Certified Arbonst WE-0846A <br /> Registered Consulting Arbonst#357 <br /> Enc Tree Assessment Form <br /> Tree Risk Rankings <br /> Tree Location Map <br />
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