2 of · Project Manager: B ryan Gordon Per: This report is based on site walk with Project Manager Bryan Gordon, Land Planner Sean Poirier, Superintendent Mickey Powers and reference

Prepared by:

Chris Scettrini, Consulting Utility Forester Joshua Keene, Senior Consulting Utility Forester, ISA Certified Arborist PD-2453A

Arborist Report For: R-914, San Rafael, CA Replacement, L-021G PO# 74008652

Date: 29 March 2018 For: Pacific Gas & Electric Co. (PG&E)

Land Consultant: Brian Kirk Land / Environmental Planner: Sean Poirier

Project Manager: Bryan Gordon

Per: This report is based on site walk with Project Manager Bryan Gordon, Land Planner Sean Poirier, Superintendent Mickey Powers and reference to Worksite Drawings and KMZs that took place 29 March 2018.

● If construction plans change as they relate to tree work then the site should be re-assessed by an

arborist to maintain the integrity of these recommendations.

● See associated tables & figures for further tree work and location information

● Tree protection recommendations are based on the International Society of Arboriculture Best

Management Practices (BMP) for Managing Trees During Construction. Tree trimming & protection

recommendations are also based on ANSI a300 Standards (parts 1 & 5). Any work performed outside

of these BMPs & Standards is solely the decision of construction mgt. Any work in reference to the

gas line right-of-way (ROW) is based on PG&E utility standard TD-4490S.

Executive Summary of Vegetation Recommendations

● Removal of 25 Trees ○ See Table 2

● Trim 26 Trees ○ See Table 3

● Remove 67,000 Square Feet of Misc. grass, coyote brush, scrub oak brush

Southern Section of Project area appears to be in proximity or within property parcel APN: 180-124-06 (per PG&E’s Land Parcels Layer) which is owned by CIVIC CENTER MARIN LLC. Permission regarding vegetation work with property owners is recommended.

Central Section of Project area appears to be in proximity or within property parcel APN: 155-110-24 (per PG&E’s Land Parcels Layer) which is owned by MHC CONTEMPO MARIN LLC. Permission regarding vegetation work with property owners is recommended.

29 March 2018, San Rafael Arborist Report Page 1 of 24

Northern Section of Project area appears to be in proximity or within property parcel APN: 155-011-08 and APN: 155-011-07 (per PG&E’s Land Parcels Layer) which is owned by SILVEIRA SAN RAFAEL RANCH LLC. Permission regarding vegetation work with property owners is recommended.

Eastern Section of Project area appears to be in proximity or within property parcel APN: 155-011-06 (per PG&E’s Land Parcels Layer) which is owned by SONOMA-MARIN AREA RAIL TRANSIT DISTRICT. Permission regarding vegetation work with property owners is recommended.

Review of City of San Rafael and Marin County Tree ordinances is recommended. Introduction

Request for arborist support was received 26 February 2018. Project referred to as R-914 was evaluated 29 March 2018 per site visit with Project Manager Bryan Gordon, Land Planner Sean Poirier, Superintendent Mickey Powers and review of Construction Drawings and KMZs. Vegetation management at this site was requested in order to provide a safe and clear workspace for the construction personnel, equipment staging and work site excavations of Project R-914 near Line L-021G, MP 18.39-20.02.

The following recommendations are made to avoid irreparable damage to vegetation in the area during construction. This report goes into further detail, identifying the issues and scope of vegetation work at each location. In the event of any changes in scope of work and/or location of construction activities, the site will need to be reassessed by the Project Arborist to maintain the integrity of these recommendations. Project Locations: Southern Section (38.0021192, -122.5369130). Central Section (38.0091065, -122.5307298). Northern Section (38.0226074, -122.5249912), San Rafael, CA.


Scope of Work

Removal of twenty-five Trees (Removals 1-25) is recommended due to the very close proximity of proposed work, staging and excavation areas.The trimming of twenty-six Trees (Trims 1-26) next to proposed work, staging and excavation is recommended. Fifteen feet of vertical clearance recommended for Trim 1-4 and ten feet of horizontal clearance is recommended for Trim 3. Forty feet of vertical clearance for Trims 16-26 is recommended due to proximity of proposed work, staging and excavation areas in northern section of L-021G. Thirty feet of clearance for PG&E easement along central section of L-021G is indicated with Brush Area 10, Removals 3-20 and Trims 5-13. Removal of approximately 67,000 square feet of Misc. Grass, Coyote brush, Scrub oak and Misc. to-be-determined species in the proposed work, staging, excavation and trench areas for all site locations combined is recommended as well. All stumps will cut as close to ground as possible and all material and debris will be hauled off site. The Vegetation Inventory Map is presented in Figure 1, 2 and 3 below. The corresponding Brush Area and Tree data are presented in Tables 1, 2 and 3 respectively. Photos of vegetation areas are shown in Figures 3 - 32 respectively. Figure 1: Vegetation Inventory Map.


Table 1. Brush Inventory Data

Brush ID Species Area (ft2) Avg Height

(ft)

Work Reason for Work

Notes

Brush Area 1

Oleander

100 8 Remove Construction -- Above the proposed trench area, inside PGE easement

Brush Area 2

Grass 1500 2 Remove Construction --Above proposed trench area, inside PGE easement

Brush Area 3

Grass, oleander,

cherry, privet, Misc shrub

600 10 Remove Construction --In proximity of proposed work area, inside PGE easement

Brush Area 4

Grass, peach,willow

1500 8 Remove Construction --Above proposed work area, inside PGE easement

Brush Area 5

TBD, Pine 120 10 Remove Construction --Above proposed work area, inside PGE easement

Brush Area 6

Misc Shrub, Elm


Brush Area 7

Misc Grass, blackberry,

coyote brush


Brush Area 8

Cypress, Rosemary,Misc

, TBD


Brush Area 9

Cactus, Palm, succulent, oak,

TBD


Brush Area 10

Blackberry 40000 8 Remove Construction --Above proposed work area, inside PGE easement

Brush Area 11

TBD, Misc, banboo, cactus


Brush Area 12

Coyote brush, toyon,

blackberry

60 8 Remove Construction --Within proposed work area, inside PGE easement

Brush Area 13

Misc Grass 2000 3 Remove Construction --Above proposed work area, inside PGE easement


Brush Area 14

Misc Grass 10,000 3 Remove Construction --Above proposed staging area

Brush Area 15

Misc Grass 2000 3 Remove Construction --Above proposed work area, inside PGE easement

Brush Area 16

Misc Brush, Coyote brush, scrub oak, TBD

10,000 15 Remove Construction --Above proposed work area, inside PGE easement

Table 2. Removal Tree Inventory Data

Tree ID Species DBH (in)

Height (ft)

Work Degree of Trimming

Reason for Work

Notes

Remove 1 Sweetgum Liquidamber styraciflua

10 20 Remove N/A Construction --Tree is in proposed work zone

Remove 2 Valley Oak Quercus lobata

6 12 Remove N/A Construction --Tree is in proposed work area and PGE easement

Remove 3 Live Oak Quercus chrysolepis

1 3 Remove N/A Construction --Inside proposed work area and PGE easement

Remove 4 Garden Plum Prunus domestica

10 12 Remove N/A Construction --Inside proposed work and PGE easement, multi stem

Remove 5 American Plum Prunus americana

8 10 Remove N/A Construction --Inside proposed work area and PGE easement, inside of fence

Remove 6 Palm Arecaceae


Remove 7 Peach Prunus persica


Remove 8 Willow Salix hindsiana


Remove 9 Monterey Pine Pinus radiata




Remove 11 American Plum Prunus americana




Removal TBD 8 10 Remove N/A Construction --Inside proposed work area and


13 PGE easement

Removal 14

Live Oak Quercus chrysolepis


Removal 15

Willow Salix hindsiana

8 15 Remove N/a Construction --Inside proposed work area and PGE easement

Removal 16



Removal 17

Digger Pine Pinus sabiniana


Removal 18



Removal 19



Removal 20



Removal 21



Removal 22

Blackberry N/A 8 Remove N/A Construction --Inside proposed work and staging area

Removal 23

Eucalyptus Eucalyptus obliqua

80 100 Remove N/A Construction --Inside proposed work area and PGE easement, dead tree, stump grind requested

Removal 24

TBD 8 15 Remove N/A Construction --Inside proposed work area and PGE easement

Removal 25

TBD 10 18 Remove N/A Construction --Inside proposed work area and PGE easement

Table 3: Trim Tree Inventory Data

Trim ID Species DBH (in)

Height (ft)

Work Degree of Trimming

Reason for work

Notes

Trim 1 Sweetgum Liquidamber styraciflua

8 18 Trim 15’ vertical

Construction --Proximity to proposed work area

Trim 2 Peppertree Rus ovata



Trim 3 Willow Salix hindsiana


Construction --Proximity to proposed work area, 12’ vertical clearance and trim to fence.

Trim 4 Chinese Elm Ulmus parvifolia



Trim 5 Japanese Maple Acer palmatum

2 8 Trim 5’ horizontal

Construction --Proximity to proposed work area and PGE easement, trim to fence


Trim 6 Redwood Sequoia sempervirens


Construction --Proximity to proposed work area and inside PGE easement

Trim 7 Monterey Pine Pinus radiata


Construction --proximity to proposed work area and inside PGE easement










Trim 11 TBD 4 12 Trim 2’ horizontal

, 12’ vertical





Trim 13 Redwood Sequoia sempervirens

45 40 Trim and Protect

15’ vertical


Trim 14 Valley Oak Quercus lobata



Trim 15 Valley Oak Quercus lobata



Trim 16 Eucalyptus Eucalyptus obliqua





Construction --proximity to work proposed work area and inside PGE easement


















Construction --Proximity to proposed work area and inside PGE easement




Trim 25 Eucalyptus 55 75 Trim 40’ Construction --proximity to proposed work area


Eucalyptus obliqua vertical and inside PGE easement




Photos of Recommended Vegetation Work Figure 3: Brush Area 1 indicated with dashed green line, Removal 1 indicated with red arrow, Trim 1 indicated with dashed yellow line.

Figure 4: Trim 2 indicated with dashed yellow line. 12 feet vertical clearance.


Figure 5: Brush Area 2 indicated with dashed green line, Trim 3 indicated with dashed yellow line and removal 2 indicated with red arrow.

Figure 6: Trim 3 indicated with dashed yellow line.


Figure 7: Removals 3-4 indicated with red arrows, Brush Area 10 indicated with dashed green line.

Figure 8: Trim 5 indicated with dashed yellow line, Brush Area 3 and 10 indicated with dashed green line.


Figure 9: Brush Area 4 and 10 indicated with dashed green line.

Figure 10: Removal 5 indicated with red arrow, Brush Area 10 indicated with dashed green line.


Figure 11: Brush Area 5 indicated with dashed green line.

Figure 12: Trim 6 indicated with dashed yellow line.


Figure 13: Removal 6 indicated with red arrow.

Figure 14: Removal 7 indicated with red arrow, Trim 7 indicated with dashed yellow arrow, Brush Area 10 indicated with dashed green line.


Figure 15: Removal 8 indicated with red arrow.

Figure 16: Trim 8 indicated with dashed yellow line, Brush Area 6-10 indicated with dashed green line.


Figure 17: Removal 8 and 9 indicated with red arrows.

Figure 18: Removal 10 indicated with red arrow, Brush Area 10 indicated with dashed green line.


Figure 18: Trim 9 indicated with dashed yellow line, Brush Area 8 indicated with dashed green line.

Figure 19: Trim 10 indicated with dashed yellow line, Removal 11 indicated with red arrow.


Figure 20: Removal 12-13 indicated with red arrow, Brush Area 9-10 indicated with dashed green line and arrow.



Figure 22: Removals 14-18 indicated with red arrows.

Figure 23: Removals 19 and 20 indicated with red arrows, Trim 12 indicated with dashed yellow line.


Figure 24: Trim 13 indicated with dashed yellow line, Brush Area 10 indicated with dashed green line.



Figure 26: Brush Area 14 indicated with dashed green line, Removal 22 indicated with red arrow.



Figure 28: Trim 14 indicated with dashed yellow line. Trim 15 is found south with similar trimming expectations.

Figure 29: Brush Area 15 indicated with dashed green line, Trim 16-21 indicated with dashed yellow lines, Removal 23 indicated with red arrow.


Figure 30: Alternate photo of Trims 16-21 and Removal 23.

Figure 31: Trims 22-26 indicated with dashed yellow lines.


Figure 32: Removals 24-25 indicated with red arrows, Brush Area 16 indicated with dashed green line.


Definitions

Arborist: professional who possesses the technical competence gained through experience and related training to provide for or supervise the management of trees and other woody plants in residential, commercial, and public landscapes. Critical Root Zone (CRZ): area of soil around a tree where the minimum amount of roots considered critical to the structural stability or health of the tree are located. CRZ determination could be based on the Drip-line or a multiple of DBH, but because root growth can be asymmetric due to site conditions, on-site investigation may be required. Crown (Canopy) Raising: in pruning, the selective removal of lower limbs from a tree crown to provide clearance. Diameter at Breast Height or DBH: an arborist standard of measure for a tree. The trunk(s) diameter is measured at 4.5ft above natural grade. If there are multiple trunks, they are measured individually and added together. Drip-line: imaginary line defined by the branch spread of a single tree or group of trees. Project Arborist: PG&E assigned Arborist to the project. Duties may include but not limited to assessing and providing recommendations on tree issues, tree permitting with agencies, scheduling and overseeing tree work, site monitoring, spot checking, etc. Root Pruning: in tree conservation and preservation, the process of cutting roots cleanly behind the line of a planned excavation to prevent tearing and splintering of remaining roots. Tree Protection Zone (TPZ): defined area within which certain activities are prohibited or restricted to prevent or minimize potential injury to designated trees, especially during construction or development.

Reference

Vegetation prescriptions and recommendations are based on:

● International Society of Arboriculture Best Management Practices for “Managing Trees During Construction.” ● ANSI A300 Standards (part 5) Management of Trees and Shrubs During Site Planning, Site Development, and

Construction. ● ANSI A300 Standards (part 1) Standard Practices Pruning. ● Any work in reference to the gas line right-of-way is based on PG&E utility standard TD-4490S.

* Any work performed outside of these BMPs & Standards is solely the decision of construction management.


Documents

2 of · Project Manager: B ryan Gordon Per: This report is based on site walk with Project Manager Bryan Gordon, Land Planner Sean Poirier, Superintendent Mickey Powers and reference