Hayward Fire Training Facility Tree Evaluation and Construction Impact Assessment Hayward, CA

PREFACE

This report is an evaluation of trees located within the proposed development area of the Hayward Fire Training Facility. The purpose of this evaluation is to assess the health and structural condition of trees occurring on the site and to provide a value for trees that qualify as ‘protected’ trees under the city of Hayward Tree Preservation Ordinance Chapter 10 Article 15.

James MacNair, principal of MacNair and Associates, ISA Certified Arborist WE-0603A, and ISA Qualified Tree Risk Assessor prepared this evaluation and report.

September 14, 2017

Unless expressed otherwise, the information contained in this report covers only those items that were examined and reflects the condition of those items at the time of inspection. The inspection is limited to visual examination of accessible items without dissection, excavation, probing, or coring. There is no warranty or guarantee, expressed or implied, that problems or deficiencies of the trees in questions may not arise in the future.

POST OFFICE BOX 1150 • GLEN ELLEN, CA 95442 • PHONE: 707.938.1822 Table of Contents

Hayward Fire Training Facility- Tree Evaluation and Construction Impact Assessment

Assignment ...... 1 Site Description ...... 1 Tree Species Discussion ...... 1 Construction Impact ...... 1 Tree Valuation ...... 2 Individual Tree Evaluations (Datum Descriptions) ...... 2 Site/Tree Images ...... 4-15

Appendix A- Tree Evaluation and Construction Impact Matrix ...... Attached Appendix B- Tree Valuation ...... Attached Appendix C- Tree Locations and Numbering Aerial ...... Attached

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Assignment:

The evaluated trees are numbered with tree locations shown on the attached aerial map. Twenty- seven (27) trees are individually evaluated as part of this report with all of the trees located within the project construction limits and along the street frontage. Appendix A is the individual tree data matrix that provides the specific tree description information and construction impact assessment.

Site Description:

The site is located 1401 West Winton Avenue in Hayward adjacent to the Hayward Municipal Airport. The project site is currently a fire department training facility that is being renovated and expanded to include new buildings and parking lots. The topography is flat and all of the trees are part of an existing landscape.

Tree Species Descriptions:

The 27 trees consist of seven species including three (3) bronze loquat (Eriobotrya deflexa), one (1) English walnut (Juglans regia), three (3) ginkgo (Ginkgo biloba), eight (8) Italian stone pine (Pinus pinea), nine (9) London plane tree (Platanus x acerifolia ‘Bloodgood’), one (1) Shamel ash (Fraxinus uhdei), and two (2) willows (Salix laevigata).

Detailed descriptions of the trees are provided in Appendix A of this report. The majority of the trees are in moderate health. The exceptions are the willows, Shamel ash, and four of the London plane trees are in poor to marginal health due to decay in the willows and drought stress impacting the ash and plane trees.

There is variability in structure ratings with the multiple trunk Italian stone pines having trunk attachment defects typical of this species, the willows having significant trunk decay, and the ash having included limb attachments.

The Tree Preservation Ordinance defines ‘protected trees’ as “trees having a minimum trunk diameter of eight inches measured 54 inches above the ground. When measuring a multi-trunk tree, the diameters of the three largest trunks shall be added together.” All of the evaluated trees meet the criteria for ‘protected’ tree status.

Construction Impact:

The construction plans indicate that removal of all the trees is required. Consequently, no tree protection procedures or recommendations are necessary for the on-site trees. However, the trees on the adjacent site to the west consists of mature stature Canary Island pines (Pinus caneriensis) and Monterey pines (Pinus radiata). These trees may require tree protection

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Tree Valuation:

With the exception of the London plane trees (street trees) being removed for the PG&E gas line project, all of the protected trees have been appraised using the ninth edition of the Guide for Plant Appraisal and specifically using the Trunk Formula Method. The valuation calculations are provided in Appendix B. The total appraisal value for the 18 trees is $183,900.00.

Individual Tree Evaluations

Following is a description of the various datum used in the evaluations.

Tree #:

The trees have been assigned a number as indicated on the aerial plan.

Botanical and Common Names:

The botanical name (species) and common name are provided for each tree.

DBH and # of Trunks:

DBH refers to the measurement of the trunk diameter at breast height (54 inches above grade). This measurement is useful to arborists providing quotations for tree maintenance work and evaluating tree growth over time.

The # of trunks notes single or multiple trunk trees. Trunks must occur at or below 54 inches above grade for tree to be considered as having multiple trunks for purposes of measurement.

Height and Crown Diameters:

These fields are approximate visual estimates of the tree’s height and crown spread. Accuracy is within plus or minus 10% of the indicated measurement.

Health and Structural Ratings and Descriptions:

The following chart describes the health and structural rating system used in the evaluation. It is a rating of relative conditions such as vigor, extent of decay, structure, and insect or disease problems. Good and moderate ratings indicate limited structural problems, acceptable vigor, and an absence of significant pest or disease problems. Poor and marginal ratings indicate serious health or structural problems especially if the tree is situated near structures or public areas. Trees rated as structurally poor or marginal are often at high risk of structural failure.

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Rating Chart:

4 Good condition Relatively minor structural concerns and no serious insect or disease problems. 3 Moderate condition Normal and correctable problems of structure or pests and diseases. 2 Marginal condition Indicates serious problems with structure, decay, or significant insect or disease problems. 1 Poor condition Indicates very poor health, vigor, or hazardous structural condition

Trees may be rated between two conditions, such as 2.5 or 3.5. This indicates the tree does not precisely meet the criteria for either of the two categories and allows the rating system to be used as a continuum.

The Health Description and Structural Description fields describe the basis for the health and structural rating. The specific pests, disease, and structural defects observed are described and identified if possible.

This evaluation is of above ground structure only and additional defects may exist at the root collar. Often, larger mature and over-mature trees require a root collar examination to evaluate the primary structural roots and root collar for decay and disease.

Observations:

This is summary discussion of the health and structural ratings as well as identification of any significant pest or disease issues or structural defects.

Suitability For Preservation

A rating has been provided for suitability for preservation based upon a tree’s ability to tolerate construction impact. The age, species, and condition of the tree affect this rating. Grading or site layout requirements may take precedent over this rating.

Recommendations/Construction Impact:

Recommendations are provided for either tree protection procedures or removal. Hazard abatement procedures may also be included where appropriate. A summary of potential impact to the tree from the proposed construction is also described. Clearance distances and type of construction are considered as part of this assessment.

Protected Tree Status:

Status of tree relative to protected tree designation based upon the city of Hayward Tree Preservation Ordinance.

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Site/Tree Images:

Tree #1, bronze loquat.

Trees #1, #2, and #3 bronze loquats.

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Italian stone pines (trees #4, #5, and #6).

Lower crowns of the Italian stone pines with dense ivy growing on trees.

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Italian stone pine #6.

Willows along property line (#7 and #8)

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Old, decayed wound on scaffold limb of willow.

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Italian stone pines, trees #9 and #10.

Mature Canary Island pines and Monterey pines on adjacent government property to west.

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Shamel ash, tree#11.

Italian stone pines, trees #12, #13, and #14.

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Defective, included, co-dominant trunks on Italian stone pine.

English walnut, tree #15.

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Ginkgo, tree #17.

Ginkgo, tree #21.

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London plane tree (tree #20) in marginal health due to drought stress. Arrow indicated underground gas line location. Tree #16.

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London plane tree in very poor condition (tree #18)

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London plane tree (#22) at adjacent property.

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London plane trees (#23 and #24) at adjacent property to east.

London plane trees (#25, #26, #27) at future parking lot.

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Appendix A

Tree Evaluation and Construction Impact Matrix Hayward Fire Training Facility, Hayward, CA- Tree Evaluation and Construction Impact Assessment (Appendix A)

Hayward Fire Training Facility, Hayward, CA- Tree Evaluation and Construction Impact Assessment

Health and Structural Rating Key: 3.0 = moderate or better condition Construction Impact Code: RC= Removal Due to Construction 2.5 = marginal to moderate RR- Removal Recommended Due to Condition 2.0 = marginal condition PI= Possible Impact- Tree Protection Required 1.5 = poor to marginal condition NI= No Impact 1.0 = poor condition Tree Tag Trunk Suitability for Appraisal /GPS Diameter @ # of Crown Crown Health Structural Preservation Tree Impact Protected Value Species Comments/Observations Construction Impact Waypoin 4.5' Trunks Height Diameter Rating Rating (Based on Code Tree Status (Protected t (inches) Condition) Trees) Wide, spreading crown form. Closely spaced, Located within bronze loquat (Eriobtrya multiple limb attachments form at 8'. No construction or grading 001 19.5 1 25'± 35'-40'± 3.0 3.0 Moderate RC Yes $12,100.00 deflexa ) significant structural defects observed. Vigor and limits with removal foliage density are moderate to good. required. Rounded crown form with closely spaced, multiple Located within limb attachments form at 8'. No significant construction or grading 002 bronze loquat 13.5 1 25'± 25'± 3.0 3.0 Moderate RC Yes $5,800.00 structural defects observed. Areas of variable limits with removal foliage density. Limited twig dieback occurring. required. Located within Wind shaped crown with closely spaced, multiple construction or grading 003 bronze loquat 13.5 1 25'± 30'± 2.5 3.0 limb attachments form at 8'. Significant twig Moderate RC Yes $5,800.00 limits with removal dieback occurring. required.

Mature tree with co-dominant trunks forming at Located within 10'. West trunk has 45° angle and then ascends. Italian stone pine (Pinus construction or grading 004 30.5 1 35'-40'± 50'-55'± 3.0 2.0 Originally a three trunk structure with trunk Marginal RC Yes $12,900.00 pinea ) limits with removal removal scar. Wood reaction ridge present. Dense required. crown with normal vigor. Dense ivy on lower trunk.

Mature tree with three trunk structure forming at 4.5'. Wide, symmetrical crown form. Wood Located within reaction ridge formed at trunk union. Significant construction or grading 005 Italian stone pine 26; 31 2 35'-40'± 50'-55'± 3.0 2.0 Marginal RC Yes $21,100.00 pavement displacement occurring from roots. limits with removal Vigor and foliage density are normal. Dense ivy on required. lower trunk. Mature tree with closely spaced limb attachments Located within forming at 6'. Wide, symmetrical, and dense construction or grading 006 Italian stone pine 43 1 35'-40'± 50'-55'± 3.0 2.0 crown. Extended limb over building. Vigor and Marginal RC Yes $23,300.00 limits with removal foliage density are normal. Dense ivy on lower required. trunk. Located within Mature tree with significant trunk and limb decay. construction or grading 007 willow (Salix laevigata) 21 1 40'-45'± 35'-40'± 2.0 1.5 History of limb failure. Old second trunk removed Poor RC Yes $900.00 limits with removal at base. required. Low, two trunk structure forming at grade. Small Located within cavity opening at base of trunk. High-branched construction or grading 008 willow 6; 14 2 40'± 30'-35'± 2.0 2.0 Poor RC Yes $400.00 structure. On opposite side of fence is a 15" willow limits with removal in very poor condition. required. Mature tree with low, two-trunk structure. Wide Located within structure with extended and heavy limbs. History construction or grading 009 Italian stone pine 34; 35 2 45'-50'± 40'-45'± 3.0 2.0 Marginal RC Yes $27,600.00 of lower crown pruning. Vigor and foliage density limits with removal are normal. required.

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Tree Tag Trunk Suitability for Appraisal /GPS Diameter @ # of Crown Crown Health Structural Preservation Tree Impact Protected Value Species Comments/Observations Construction Impact Waypoin 4.5' Trunks Height Diameter Rating Rating (Based on Code Tree Status (Protected t (inches) Condition) Trees) Mature tree with single trunk structure. Upright Located within crown form with no significant structural defects construction or grading 010 Italian stone pine 32 1 50'± 30'-35'± 3.0 3.0 Moderate RC Yes $18,100.00 observed. Dense crown. Pavement displacement limits with removal occurring. required. Semi-mature tree with closely spaced, multiple Located within Shamel ash (Fraxinus limb attachments. Deep seams and included construction or grading 011 17 30'-35'± 30'-35'± 2.0 2.0 Poor RC Yes $2,600.00 uhdei ) attachments present. Vigor is moderately low, with limits with removal significant upper crown dieback occurring. required. Located within Mature tree with two-trunk structure with seam construction or grading 012 Italian stone pine 24; 30 2 35'-40'± 35'-40'± 3.0 2.0 present. Dense, symmetrical crown form. Marginal RC Yes $20,800.00 limits with removal Extended and weighted limb form. required. Located within Mature tree with co-dominant trunks forming at construction or grading 013 Italian stone pine 33.5 1 35'-40'± 35'-40'± 3.0 2.0 10'. Vertical trunk forms with narrow union and Marginal RC Yes $15,300.00 limits with removal wood reaction ridge present. required. Located within Mature tree with single trunk structure. No construction or grading 014 Italian stone pine 26 35'-40'± 35'-40'± 3.0 3.0 significant structural defects observed. Dense Moderate RC Yes $12,200.00 limits with removal crown. required. Located within Young tree with low structure. No significant English walnut (Juglans construction or grading 015 7 (low) 2 12'± 15'± 3.0 3.0 structural defects observed. Vigor and foliage Moderate RC Yes $300.00 regia ) limits with removal density are moderate. Located at fence line. required. Mature tree located adjacent to sidewalk. History Located within the PG&E of displacement and repairs. Closely spaced, London plane tree high pressure gas line multiple limb attachments form at 10'. History of 016 (Platanus x acerifolia 26 1 40'-45'± 45'-50'± 2.0 3.0 Marginal easement and is being NA Yes NA lower crown pruning. No significant structural 'Bloodgood') removed as part of the defects. Vigor is low with significant branch and gas line project. twig dieback occurring. Apparent drought stress. Located within Small tree with leaning form. No significant construction or grading 017 ginkgo (Ginkgo biloba ) 7.5 1 15'± 20'± 2.5 3.0 structural defects. Vigor is moderately low from Moderate RC Yes $1,800.00 limits with removal drought stress. required. Located within the PG&E Mature tree located adjacent to storm drain. Open high pressure gas line limb structure with history of lower crown pruning. 018 London plane tree 16.5 1 35'± 30'± 1.5 2.5 Poor easement and is being NA Yes NA Very low vigor with substantial branch and twig removed as part of the dieback. gas line project. Located within Young tree with closely spaced multiple limb construction or grading 019 ginkgo 7 1 18'-20'± 15'± 3.0 3.0 attachments. No significant structural defects Moderate RC Yes $1,600.00 limits with removal observed. Vigor and foliage density are moderate. required. Located within the PG&E Located in 4' sidewalk cutout. Semi-mature tree high pressure gas line 020 London plane tree 13 1 35'± 30'± 2.0 2.5 with open, symmetrical crown form. Lower crown Marginal easement and is being NA Yes NA pruning. Vigor is low with twig dieback occurring. removed as part of the gas line project.

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Tree Tag Trunk Suitability for Appraisal /GPS Diameter @ # of Crown Crown Health Structural Preservation Tree Impact Protected Value Species Comments/Observations Construction Impact Waypoin 4.5' Trunks Height Diameter Rating Rating (Based on Code Tree Status (Protected t (inches) Condition) Trees) Located within Young tree with no significant structural defects. construction or grading 021 ginkgo 6 1 18'± 12'± 3.0 3.0 Moderate to Good RC Yes $1,300.00 Vigor and foliage density are moderate. limits with removal required. Mature tree with closely spaced, multiple limb Located within the PG&E attachments. No significant structural defects high pressure gas line 022 London plane tree 27 1 50'-55'± 50'-60'± 2.5 3.0 present. Lower crown pruning. Vigor and foliage Moderate easement and is being NA Yes NA density are moderately low with twig dieback removed as part of the occurring. gas line project. Mature tree with closely spaced, multiple limb Located within the PG&E attachments. No significant structural defects high pressure gas line 023 London plane tree 25 1 50'-55'± 50'-60'± 2.5 3.0 present. Lower crown pruning. Vigor and foliage Moderate easement and is being NA Yes NA density are moderately low with twig dieback removed as part of the occurring. gas line project. Located within the PG&E high pressure gas line Mature tree nearly entirely defoliated. Lower 024 London plane tree 18.5 1 50'-55'± 50'-60'± 1.5 2.5 Poor easement and is being NA Yes NA trunk wound present. Open limb structure. removed as part of the gas line project. Mature tree with closely spaced, multiple limb Located within the PG&E attachments. No significant structural defects high pressure gas line 025 London plane tree 26 1 45'-50'± 40'-45'± 2.5 3.0 present. Lower crown pruning. Vigor and foliage Moderate easement and is being NA Yes NA density are moderately low with twig dieback removed as part of the occurring. gas line project. Mature tree with closely spaced, multiple limb Located within the PG&E attachments. No significant structural defects high pressure gas line 026 London plane tree 15.5 1 45'-50'± 40'-45'± 2.5 3.0 present. Lower crown pruning. Vigor and foliage Moderate easement and is being NA Yes NA density are moderately low with twig dieback removed as part of the occurring. gas line project. Mature tree with closely spaced, multiple limb Located within the PG&E attachments. No significant structural defects high pressure gas line 027 London plane tree 31.5 1 50'-55'± 50'-60'± 2.5 3.0 present. Lower crown pruning. Vigor and foliage Moderate easement and is being NA Yes NA density are moderately low with twig dieback removed as part of the occurring. gas line project.

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Appendix B

Tree Valuations Hayward Fire Training Facility Appendix B- Tree Valuations

Trunk Formula Method Appraisal Calculations

Trunk Diameter (Or Replacement Replacement Appraised Trunk Species Replacement Installation Installed Tree Basic Tree Appraised Appraised Value Tree # Species Condition equivalent Location Site Contribution Placement Tree Size (in.) Tree Trunk Unit Tree Cost Area (TA ) (or % Loss Rating Tree Cost Cost Cost Cost Value (rounded) multiple trunk (Average) Area adjusted TA) diameter) bronze loquat 001 75% 19.5 33% 70% 15% 15% 70% 1.69 2.24 $172.73 $345.46 $518.19 $231.33 298 $69,052.58 $12,084.20 100% $12,100 (Eriobtrya deflexa ) 002 bronze loquat 75% 13.5 33% 70% 15% 15% 70% 1.69 2.24 $172.73 $345.46 $518.19 $231.33 143 $33,096.21 $5,791.84 100% $5,800 003 bronze loquat 75% 13.5 33% 70% 15% 15% 70% 1.69 2.24 $172.73 $345.46 $518.19 $231.33 143 $33,096.21 $5,791.84 100% $5,800 Italian stone pine 004 60% 30 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 707 $77,073.94 $12,948.42 100% $12,900 (Pinus pinea ) 005 Italian stone pine 60% 40 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 1149 $125,347.43 $21,058.37 100% $21,100 006 Italian stone pine 60% 43 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 1273 $138,874.92 $23,330.99 100% $23,300 willow (Salix 007 10% 21 33% 70% 15% 15% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 346 $37,766.23 $881.21 100% $900 laevigata) 008 willow 10% 15 33% 70% 15% 15% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 177 $19,268.49 $449.60 100% $400 009 Italian stone pine 60% 49 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 1504 $164,075.32 $27,564.65 100% $27,600 010 Italian stone pine 75% 32 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 788 $85,964.99 $18,052.65 100% $18,100 Shamel ash 011 30% 17 33% 70% 15% 15% 30% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 788 $85,964.99 $2,578.95 100% $2,600 (Fraxinus uhdei ) 012 Italian stone pine 60% 38 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 1134 $123,660.86 $20,775.02 100% $20,800 013 Italian stone pine 60% 33 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 835 $91,092.35 $15,303.51 100% $15,300 014 Italian stone pine 75% 26 40% 70% 25% 25% 70% 2.46 4.75 $172.73 $345.46 $518.19 $109.09 531 $57,891.10 $12,157.13 100% $12,200 English walnut 015 75% 7 25% 70% 3% 3% 30% 2.2 3.8 $172.73 $345.46 $518.19 $136.37 38 $5,245.31 $298.98 100% $300 (Juglans regia ) ginkgo (Ginkgo 017 75% 7.5 27% 70% 5% 5% 90% 1.69 2.24 $172.73 $345.46 $518.19 $231.33 44 $10,214.88 $1,838.68 100% $1,800 biloba ) 019 ginkgo 75% 7 27% 70% 5% 5% 90% 1.69 2.24 $172.73 $345.46 $518.19 $231.33 38 $8,898.29 $1,601.69 100% $1,600 021 ginkgo 80% 6 27% 70% 5% 5% 90% 1.69 2.24 $172.73 $345.46 $518.19 $231.33 28 $6,537.52 $1,255.20 100% $1,300 Total: $183,900

Appraised Value = Basic Tree Cost x Species Rating x Condition x Location Basic Value = Unit Tree Cost x Appraised Trunk Area (TA or ATA) Condition = Structural integrity and health rating (rating assigned based upon the following factors: roots, trunk, scaffold branches, smaller branches and twigs, and foliage.) Location = Mean of site, contribution, and placement ratings. Installed Tree Cost = The cost to buy and install the largest normally available transplantable tree in the Western Region. Unit Tree Cost = The cost per unit trunk area of an installed replacement tree as established by the Regional Supplement. Appraised Trunk Area (TA) = Cross-sectional trunk area measured at 4.5 feet above grade (dbh) in square inches. Adjusted TA = Adjusted trunk area for trees greater than a 30 inch diameter. Species Factor = regional rating of the appraised tree species.

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Appendix C

Tree Locations and Numbering Aerial Hayward Fire Training Facility Tree Location and Numbering Aerial

Aerial showing tree locations and assigned tree numbers.

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