HomeMy WebLinkAboutItem 2 - 3490 Empresa Dr. (ARCH-0516-2021)TREE COMMITTEE AGENDA REPORT
SUBJECT: Review of the proposed removal of 10 trees and replanting of 14 trees. Tree removals are
proposed to facilitate a proposed office/warehouse development consisting of 16,741 square feet of
commercial space, with associated parking and onsite landscaping.
PROJECT ADDRESS: 3490 Empresa Drive BY: Kyle Bell, Associate Planner
Phone: (805) 781-7524
E-mail: kbell@slocity.org
FILE NUMBER: ARCH-0516-2021 FROM: Anthony Whipple, Interim City Arborist
RECOMMENDATION: Recommend the Planning Commission find the proposed tree removals and
compensatory planting plan as part of the 3490 Empresa Drive Development project consistent with the
Tree Regulations. The Tree Committee may provide recommended considerations or condition(s) related
to the tree removals and compensatory planting.
SITE DATA
SUMMARY
The project consists of a proposed development of a vacant commercial property to include a two-story
warehouse and office development consisting of 16,741 square feet of commercial space. The project to
remove 10 existing trees and replace with 14 trees (Attachment 1, Tree Removal Plans).
1.0 COMMITTEE PURVIEW
The Tree Committee’s role is to review the project and provide a recommendation to the Planning
Commission regarding consistency with the policies and standards set forth in San Luis Obispo Municipal
Code (SLOMC) §12.24 (Tree Regulations).
Applicant Bryan Ridley
Zoning Commercial Retail (C-S-SP) within
the Higuera Commerce Park
Specific Plan
General Plan Services and Manufacturing
Site Area ~23,714 square feet
Environmental
Status
Categorically exempt from
environmental review under CEQA
Guidelines Section 15332 (In-Fill
Development Projects)
Meeting Date: February 28, 2022
Item Number: 2
Item 2
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ARCH-0516-2021
3490 Empresa Drive
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2.0 PROJECT DESCRIPTION
The project includes the removal of nine (10) on-site trees; six (6) Oak trees, and three (4) London Plane
trees. The six Oak trees range in size from 6-inches to 10-inches in diameter at breast height (DBH), and
the London Plane trees range in size from 16-inches to 34-inches (DBH). The Arborist Report (Attachment
2), prepared by Chris Stier, at Greenvale Tree Company, identified that the Oak trees are in good condition
but show evidence of overcrowding due to the overlapping canopies and significant one-sided leans. The
London Planes were also identified to be in good condition; however, the 34-inch London Plane tree seems
to have outgrown the original planter. The arborist report recommends removal of the trees as necessary to
accommodate the proposed building footprint. The project proposes to replace the 10 trees with 14 new
trees (replacement ratio 1.4:1).
Tree Type and Quantity Tree Species
Street & Shade Trees
(size undetermined) (14)
Species undetermined
3.0 TREE REGULATIONS
The City’s Tree Ordinance (Municipal Code Chapter 12.24) was adopted in 2010 and recently updated in
2019 with the purpose of establishing a comprehensive program for installing, maintaining, and preserving
trees within the City. This ordinance establishes policies, regulations, and specifications necessary to govern
installation, maintenance, removal, and preservation of trees to beautify the city; to purify the air; to provide
shade and wind protection; to add environmental and economic value; and to preserve trees with historic or
unusual value.
Criteria for Construction Related Tree Removal Recommendations. SLOMC §12.24.090 subsection F.4
requires review by the Tree Committee for tree removal requests related to discretionary permit applications
for Major Development Review1, to make a recommendation based on criteria set forth in subsection G.
The criteria are provided below with a description of how the proposed project responds.
• Size of Tree. The size of the trees proposed for removal range from 6-inches to 34-inches DBH.
Staff recommends that the Tree Committee provide feedback to the applicant team and Planning
Commission regarding potential preservation of the 34-inch London Plane tree, as the building
footprint could be slightly re-oriented to preserve the tree, and minor site improvements could be
made to enhance the existing planter to accommodate the continued growth of the tree.
• Location of Tree on Private Property. All trees proposed for removal are located on private property.
The trees are located throughout the property; some trees are visible from the public right-of-way,
including most prominently the London Plane trees. Staff recommends that the Tree Committee
provide feedback to the applicant team and Planning Commission regarding the potential
preservation of the 16-inch London Plane tree closest to the existing driveway approach, as this
location does not interfere with the proposed building footprint, and site improvements may be
1 Zoning Regulations § 17.106.030. Levels of Development Review. (D) Major. Major Development Review is a
discretionary Planning Commission review process that includes public notice with a public hearing conducted as is
required for all Planning Commission actions. (1) Multi-unit residential developments with more than 10 units... (3)
Nonresidential development with more than 10,000 gross square feet of new construction…
Item 2
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ARCH-0516-2021
3490 Empresa Drive
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slightly modified to accommodate preservation of the existing tree.
• Species of Tree. The species of trees proposed for removal include Oak trees which are native to
California, and London Plane trees which are non-native species from southeastern Europe.
• Forestry Best Practice. The project includes a replanting plan for an additional 14 trees that
significantly increases the biodiversity of the existing tree species and age distribution throughout
the neighborhood. Staff recommends that the Tree Committee provide feedback to the applicant
team and Planning Commission on the preferred species of all tree plantings (such as deciduous
species) within the parking lot and along the street, as well as the preferred size of all new tree
plantings.
• Public Right-of-Way Obstruction or Displacement. The project site street frontage does not contain
any existing street trees, therefore no street trees are proposed for removal.
• Compliance Regarding Compensatory Plantings. Per the Tree Regulations, tree removal shall be
compensated by planting a minimum of one new tree for each tree removed onsite (1:1 replanting
ratio). There are 10 trees proposed for removal throughout the site. The applicant is proposing to
replant 14 trees; this is a replanting ratio of 1.4:1. The compensatory planting plan complies and
exceeds the requirements of the Tree Regulations.
• Heritage Trees. None of the trees proposed for removal have been designated Heritage trees.
Street Tree Species. The Tree Committee may provide direction to the Planning Commission and the
applicant on any preferred species for street tree planting.
4.0 ATTACHMENTS
1. Tree Removal Plans
2. Arborist Report
Item 2
Packet Page 6
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Arborist Assessment
July 12, 2021
For: RS Paul Company, Inc.
Chris Hoover
Plant ID Quercus agrifolia (Coast Live Oak)
Platnus x acerfolia (London Plane Tree)
Task Assess trees for lot change and development
Background: It is being proposed to shift the lot line of the southern lot north toward the nearby (north) building.
In the future a new building will be built that will affect a group of six Coast Live Oak (grew from seedlings) and
four London Plane Trees (planted). All six oaks and three of the London Plane trees are directly along the current
lot line and one London Plane tree near the corner parking island will be within the eventual buildings footprint.
Quercus agrifolia (trees assessed as a group)
Canopy – Canopies of the trees are in good condition. Healthy growth with good color. Very crowded conditions
with overlapping canopies. Some twig and leaf dieback mainly due to low light levels. Likely two or three oaks
will eventually dominate under current conditions; smaller understory oaks will die. Foliage is growing through
the chain-link fence and is choking out original planted shrubbery.
Branches – Several of the oaks I noted narrow branch crotches with included bark. Some are developing
significant leans and one-sided growth due to overcrowding. Those closest to the small building adjacent will
need trimming very regularly to accommodate the building. Overall growth and position of the branches are
influenced by crowding and lack of light. Lots of small deadwood due to low light levels – fire hazard.
Trunk – I saw no cankers, lesions or galls. Some trunks are leaning due to low light levels.
Roots – No excavation of roots was made. These are close enough that curbs, pavement etc. will eventually be
disrupted/broken by roots.
Platnus x acerfolia (trees assessed as a group)
Canopy – Canopies of the trees are in good condition. Healthy growth with good color. These trees are doing
very well considering drought conditions. Some twig dieback (normal).
Branches – Likely these trees have been pruned several times to open the trees and to give the trees shape and
balance. Branch spacing, balance and weight are all very good. I see no real concerns with branch structure.
Trunk – I saw no cankers, lesions or galls.
Roots – No excavation of roots was made. These are close enough that curbs, pavement etc. will eventually be
disrupted/broken by roots. Tree in small planter near building is most likely to begin breaking curbs and
pavement – planter is very small for tree size.
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Conclusion: Considering the plans to develop this area all of the trees mentioned above will be within the
development footprint.
Recommendations:
Remove trees and mitigate with planting new trees or paying fees.
Please see pictures below for more details.
Sincerely
Chris Stier,
ISA Certified Arborist, #WE9262-A
*Assessment was made with observation, history and sound arboricultural and horticultural knowledge. It is always possible that other,
or different problems exist that may contribute to the destabilization, decline and death of trees. Further evaluation may be warranted if
the steps above do not work. Pathology tests and other lab analysis are available.
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This is a cluster of six Oaks. They are very tight and interwoven. At some point they will break the curb and pavement nearby.
Currently they are choking out the shrubs that were originally planted.
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Very crowded conditions of the Oak cluster. Many branches and trunks are leaning/imbalanced growth due to the crowding and
low light levels.
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The three London Plane trees along the current lot line and the one London Plane tree near the corner of the building will all be
in the footprint of the new building or its infrastructure.
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