4_Exhibits A-C - Laserfiche WebLink

Arborist Report—Gudaitis Residence, Pleasanton Page 7 January 19, 2021 City of Pleasanton Urban Tree Protection Requirements The Pleasanton Municipal Code Chapter 17.16 controls the removal and preservation of Heritage trees within the city. Heritage trees are defined as: 1. Any single-trunked tree with a circumference of 55 inches or more measured four and one-half feet above ground level; 2. Any multi-trunked tree of which the two largest trunks have a circumference of 55 inches or more measured four and one-half feet above ground level; 3. Any tree 35 feet or more in height; 4. Any tree of particular historical significance specifically designated by official action; 5. A stand of trees, the nature of which makes each dependent upon the other for survival or the area's natural beauty. Heritage trees may not be removed, destroyed or disfigured without a permit. Based on this definition, 16 trees are Protected or considered to be Heritage; 13 of these are off- site trees. The Protected status each tree is provided in the Tree Assessment exhibit. Evaluation of Impacts and Recommendations The Tree Assessment was the reference point for tree health, condition, and suitability for preservation. I used the Planned Unit Development Improvement Plan (Alexander&Associates, 1/14/21)to determine the project area and evaluate impacts to trees. The plans indicate demolition of the southern half of the lot and construction of three new single-family residences and a Proposed ADU, all with access from Diamond Court. The existing single-family home ("Lot 4") on the north end of the property at Sycamore Road is to remain. Impacts to individual trees are listed in the Tree Disposition Exhibit. Overall, based on my evaluation of impacts: • 21 trees will be removed (one tree, evergreen ash#64, is Heritage) • 20 trees can be preserved (11 Heritage) The twenty-one (21)trees listed for removal all are within the area planned for grading, except for tree#1320 which I am recommending for removal because it is dead. For the 20 trees planned for preservation, I expect impacts to range from minor to significant. Successful retention of the trees to be preserved will depend on the care with which work is performed around the trees and all parties committing to the Tree Preservation Guidelines (see page 9). • Coast redwoods#75-84 are growing behind a property line wall in the neighbor's yard to the west; construction impacts to these trees are expected to be minimal. • Trees#72 and 73, on the south side of the existing house, are also expected to experience minor to no impacts. • Impacts to off-site coast live oak#67 will be moderate to significant, because part of its canopy overhangs the area where the ADU unit will be constructed, close to the northern property line of that lot. In addition, it is located downhill from the demolition and grading area of the new lots, so there is a potential for root loss and impacts from excavation and altered drainage patterns on the subject property. • The building on the proposed Lot 3 appears close to off-site California black walnut#68. The tree leans south and is in poor condition. It will likely be adversely affected by the demolition and grading, I recommend monitoring of impacts during construction. The Project Arborist may recommend removal based on the observations in the field so that it does not become a safety hazard. Ho+i.Science Bartlett Consulting.Divisions of The F.A. Bartlett Tree Expert Company 11 t .. ,.$ , ,...",,,t1:,. -4, ' '?r!'• '. .#e di •uj' 1; 0:11 11 tr... za. cli• ,.,... . 126* e:t4,104.,- z FM ,::2.510 6.K.44ve ..r• „n•et.' .r---3 7- A. L.0 16.o6• • "- ,...iaraf--LEL. I i-LI.ZliCe ottD•14' '.:01$01"- •* fl "Z S A f 3 . OMOM4 44 CD . . i Ser . V •C 4- . ... . 41,*-ni t 1101 1444 t ts k t rii -' .c:;.0 PAR C E i 7 ; _1 4..'• PARCEL P.1 I Cr.510 ... k W4 ill •f: y Its PM Ii; 1 rA RiIi_ E3 1j 1. ..),, -"TT.)"NI ;:.'.f7.•![....? o , 1 i.1 .. .. 5 t V Vi • ) RECOrIDERS MEMO ---.} LENBILITY FOR NICPORt,ING MD CPPY1')G tifh•APSFACrOry Pi .1 POHTION nt 71.IC I 1-.. t III. 1,1 ll' ,, ..• ",-,-,...•... ft