TOWN OF LOS GATOS DEPARTMENT OF PARKS AND PUBLIC WORKS 41 MILES AVENUE, LOS GATOS, CA 95030
←
→
Page content transcription
If your browser does not render page correctly, please read the page content below
TOWN OF LOS GATOS
DEPARTMENT OF PARKS AND PUBLIC WORKS
41 MILES AVENUE, LOS GATOS, CA 95030
REQUEST FOR PROPOSAL
FOR DESIGN SERVICES
PINEHURST COMMUNITY GARDEN (CIP NO. 831-4610) &
RFP
LYNNE AVENUE PEDESTRIAN PATH DESIGN (CIP NO. 832-4510)
PROPOSAL SUBMITTAL DEADLINE:
DATE: February 28, 2023
TIME: 5:00 P.M.
Submit by email to: mchislett@losgatosca.gov
TABLE OF CONTENTS
A. Purpose .................................................................................................................................... 2
B. Overview ................................................................................................................................. 2
C. Proposed Scope of Services ..................................................................................................... 3
D. Proposal Format and Submission Requirements ..................................................................... 5
Submitting the Proposal ...................................................................................................... 6
Addenda .............................................................................................................................. 6
E. Evaluation Process ................................................................................................................... 7
F. Attachments ............................................................................................................................. 7
Attachment 1 – Project Location Map
Attachment 2 – Pinehurst Community Garden Sample Layout
Attachment 3 – Valley Water Telemetry Cable Map
Attachment 4 – PG&E Impact Letter & Tree Guide
Attachment 5 – Soil Characterization Report
Attachment 6 – Sample Agreement for Consultant Services
Schedule of Activities: The Town reserves the right to amend the schedule below as necessary.
Activity Anticipated Dates
RFP Release February 6, 2023
Deadline for Questions Submitted by February 21, 2023
Proposal Deadline February 28, 2023
Proposal Evaluation Approximately 4 weeks
Contract Negotiations and Execution March / April 2023
Tentative Start June 2023
Town’s Contact: For all questions related to the RFP, please email the Town’s contact listed
below:
Marina Chislett
Town of Los Gatos
Parks and Public Works Department
41 Miles Avenue
Los Gatos, CA 95030
mchislett@losgatosca.gov
Page 1
Request for Proposals
Pinehurst Community Garden (CIP No. 831-4610) & Lynne Avenue Pedestrian Path Design (CIP No. 832-4510)
REQUEST FOR PROPOSALS FOR PINEHURST COMMUNITY GARDEN (CIP NO.
831-4610) & LYNNE AVENUE PEDESTRIAN PATH DESIGN (CIP NO. 832-4510)
Proposals Due: Thursday, February 28, 2023
A. Purpose
The Town of Los Gatos (Town) is seeking proposals from experienced landscape architectural
firms to perform preliminary design services for the Pinehurst Community Garden (CIP No. 831-
4610) and the Lynne Avenue Pedestrian Path Design (CIP No. 832-4510). The design scope of
the project shall include, but not be limited to: project management, evaluation of existing
conditions, community engagement, development of conceptual designs, and preparation of 35%
plans, specifications, and estimates (PS&E).
B. Overview
The Town of Los Gatos is seeking proposals to award up to 35% design services from a qualified
landscape architectural firm for the Pinehurst Community Garden and the Lynne Avenue
Pedestrian Path Design. A location map is shown in Attachment 1.
The Town envisions working on these two projects simultaneously to create a neighborhood-
friendly and accessible public space.
Pinehurst Community Garden
Community members have advocated for a community garden in this Town-owned property
(APN: 523-43-007). This lot is encumbered with PG&E and Valley Water District easements
and the existing utility services will need to remain. Town staff will coordinate the necessary
permissions from both utilities. During this project, the design firm shall work closely with staff,
community members, and stakeholders to investigate options for conceptual designs that meet
the needs of all parties involved.
The Pinehurst Community Garden Sample Layout (Attachment 2) was developed by community
members advocating for the project. This concept plan is attached for reference only and to
provide an understanding of the scale of the project. The Town recognizes that the design
process may reveal the need for additional amenities such as parking and potable water.
Lynne Avenue Pedestrian Path
Lynne Avenue is a main thoroughfare between Union Avenue and Alta Vista neighborhood. It is
used heavily by Union Middle School and Alta Vista Elementary students, as well as adult
bicyclists and pedestrians. However, it does not have any sidewalks, decreasing walkability and
presenting a safety hazard. The Lynne Avenue Pedestrian Path proposes converting a vacant
PG&E easement located between Pinehurst and Union Avenue into a pedestrian greenway.
Portions of this property are owned by PG&E and the Town of Los Gatos with existing
Page 2
Request for Proposals
Pinehurst Community Garden (CIP No. 831-4610) & Lynne Avenue Pedestrian Path Design (CIP No. 832-4510)
easements with Valley Water and the existing utility services will need to remain. Town staff
will coordinate the necessary permissions from both utilities.
The Town currently has $120,685.80 budgeted for the Pinehurst Community Garden work and
$75,000 for the Lynne Avenue Pedestrian path.
C. Proposed Scope of Services
The following tasks and deliverable items shall be addressed in the proposal; however,
consultants are encouraged to draw upon their experience and expertise to improve the scope and
the final product.
1. Project Management:
The consultant will provide coordination and management necessary to complete the
project. Tasks shall include, but not be limited to: providing regular updates with the
Town’s project manager, preparation of agenda and meeting minutes for each meeting,
conducting field meetings, and reviewing existing field conditions and analyze existing
documents related to this project to fully understand the background.
The Town will coordinate directly with PG&E and Valley Water and advise the
necessary design requirements in compliance with current easements. The Valley Water
Telemetry Cable Map is attached for reference in Attachment 3. The PG&E Impact
Letter and Tree Guide is also attached for reference in Attachment 4.
The proposal for the Project Management task should be structured to reflect scope
needed up to 35% design.
Deliverables (not limited to): Project work plan, schedule, meeting agendas, minutes, etc.
2. Field Survey and Soils Analysis
Develop base mapping of both project locations include property boundary and
topographic information and site features (trees, paths, etc.) in detail suitable to support
the future development of construction documents. Identify private encumbrances into
the Town owned property.
The Town commissioned a Soil Characterization Report of the Pinehurst Community
Garden project area in April 2022 (Attachment 5). The consultant shall review this report
and propose and execute additional investigations that may be required to support the
design of the proposed improvements.
The Lynne Avenue Pedestrian Path Design area has not undergone any soil testing.
Consultant should propose testing and analysis that may be required to support future
public use of the area.
Page 3
Request for Proposals
Pinehurst Community Garden (CIP No. 831-4610) & Lynne Avenue Pedestrian Path Design (CIP No. 832-4510)
Deliverables (not limited to): Conduct necessary field surveying and data collection for
the Pinehurst Community Garden and the Lynne Avenue Pedestrian Path Design.
3. Community Engagement
The consultant will assist the Town in coordinating outreach efforts and facilitating the
community outreach meetings in-person and virtually, taking the lead on presenting
various design alternatives to the public. The consultant will prepare outreach materials,
graphics, meeting agendas, presentations, and minutes.
The consultant shall prepare to actively participate in five meetings; three (3) community
outreach meetings, and two (2) Town Parks Commission meetings including: 1) a pre-
design kickoff meeting to present the opportunities and constraints of the sites (with the
community only); 2) a concept review meeting (Community and Parks Commission); 3) a
final meeting to present the preferred design (Community and Parks Commission). It is
assumed that both projects will be addressed in the same meetings.
The proposal for the Community Engagement task should be structured to reflect scope
needed up to 35% design and then the completion of final design and construction
support.
Deliverables (not limited to): Project-specific community engagement, outreach
graphics/materials, presentations, meeting agendas, minutes, fliers or handouts, surveys,
etc.
4. Conceptual Design Options and 35% Design
Concept Design Alternatives. With guidance from the Town on design elements to
incorporate, prepare two to three conceptual design alternatives incorporating
requirements from existing easements with PG&E and Valley Water and community
feedback. Layouts or renderings of the concept designs with rough order of magnitude
cost estimates shall be provided to Town staff for initial review. Once the conceptual
designs are approved by the Town staff, the alternatives shall be presented to the
community and Parks Commission for comments, and for feedback on the preferred
option.
35% Design Documents. Following development of a preferred alternative for each
location, develop the Town-selected preferred design option to 35% design documents to
include plans, specifications, and cost estimates.
Deliverables (not limited to): Electronic files of conceptual design alternatives, 35%
design documents.
Page 4
Request for Proposals
Pinehurst Community Garden (CIP No. 831-4610) & Lynne Avenue Pedestrian Path Design (CIP No. 832-4510)
5. Final Design and Construction Documents (Add Alternate)
The work in Tasks 5 and 6 is not included in this RFP at this time and no cost proposal is
requested. At the Town’s discretion, the Town may request a proposal and cost schedule
from the selected consultant to prepare the items in Task 5 and prepare a contract
amendment to perform the work outlined.
Once 35% design documents are finalized and approved, the consultant will prepare
plans, technical specifications, and cost estimates with additive alternates. Tasks shall
include but not be limited to 65% and 100% final bid document submittals for the
Town’s review and approval, preparation of design documents on the Town’s title block
(24”x36”) and template, and submitting project-related documents, including estimates
and schedules, in PDF, Word, Excel, and/or AutoCAD Civil 3D formats.
6. Bid and Award and Construction Administration Support (Add Alternate)
The work in Tasks 5 and 6 is not included in this RFP. At the Town’s discretion, the
Town may request a proposal and cost schedule from the selected consultant to prepare
the items in Task 6 and prepare a contract amendment to perform the work outlined.
Bid and Award Support. The consultant shall support the Town through the bid process
and construction contract award, responding to any questions or requests for clarifications
during the bid phase, attending a pre-bid meeting if scheduled, assisting the Town to
establish the lowest responsible bidder, and providing value engineering services if bids
are above the construction budget as needed.
Construction Administration. Provide construction administration and support services.
Tasks may include: attending pre-construction and other field meetings, reviewing
submittals, responding to requests for information, providing field check services,
preparing design modifications if necessary due to unforeseen conditions, preparing as-
built documents and project closeout tasks.
Proposal Requirements
The proposal shall include the following items, at minimum:
• Project manager, key personnel, and list of subconsultants with relevant experience
and qualifications
• Approach or understanding of the project
• List of tasks with descriptions/statements on how the consultant will manage and
complete each task. Include any suggestion to improve the scope of services in the
best interest of the project and the Town. State the deliverables for each task.
• Preliminary project schedule, assuming June 2023 as the start of design services.
• Lump sum not-to-exceed fee by Task Items. Also, include an hourly fee schedule,
with yearly escalation rates as necessary. While the tasks can be combined across
projects, because the projects are funded separately, staff will need to allocate costs to
Page 5
Request for Proposals
Pinehurst Community Garden (CIP No. 831-4610) & Lynne Avenue Pedestrian Path Design (CIP No. 832-4510)
each project. Therefore, please provide a lump sum cost for Project 831-4610
(Community Garden) and a second lump sum for project 832-4510 (Lynne Avenue).
• List of projects and project references for similar projects completed for a California
public agency within the last five years, including the agency’s name and contact
information, and a summary of the tasks and responsibilities provided
• Statement that the Town’s contract template is acceptable to the Proposer or if not,
list any exceptions or change requests to the contract. The Sample Agreement for
Consultant Services (Attachment 6) is attached for reference.
Evaluation Process
Town staff shall rate and select the consultant for the project based on the following criteria:
• Cost of the proposal (20%)
• Completeness of the proposal (20%)
• Qualification of the project team and key personnel (35%)
• Approach and understanding of the project and tasks (25%)
If necessary, oral interviews may be conducted in March 2023 with top-ranking firms based on
the evaluation of the proposals
D. Proposal Format and Submission Requirements
Submitting the Proposal
The proposal must be received by the Town no later than Tuesday, February 28, 2023 at
5:00PM. The Town requires that all proposals be submitted electronically via email or file
sharing sites and physical hard copies do not need to be submitted. The proposal shall be clearly
marked for “Pinehurst Community Garden & Lynne Avenue Pedestrian Path Design” and
emailed to:
Marina Chislett
Environmental Programs Specialist
Town of Los Gatos – Parks and Public Works
mchislett@losgatosca.gov
The consultant shall confirm receipt that the submitted proposal has been received. Each
proposal must include the preliminary fee schedule for various services provided by the
consultant and shall be inclusive of all work and labor including, but not be limited to, the
consultant’s costs for site visits and fee schedule of sub-consultants.
Addenda
If any revisions to this RFP are necessary, the Town shall provide responses and clarifications to
questions via email. The last day for issuance of an addendum is Wednesday, February 22, 2023.
A proposer shall submit any questions or requests for clarification to the Town’s contact by
Tuesday, February 21, 2023.
Page 6
Request for Proposals
Pinehurst Community Garden (CIP No. 831-4610) & Lynne Avenue Pedestrian Path Design (CIP No. 832-4510)
E. Evaluation Process
Town staff will review the proposals and rank the consultants. The evaluation of the proposals
shall be within the sole judgment and discretion of the Town. All contacts during the evaluation
phase shall be through the Town’s contact only.
F. Attachments
The following attachments are incorporated into the Request for Proposals:
Attachment 1 – Project Location Map
Attachment 2 – Pinehurst Community Garden Sample Layout
Attachment 3 – Valley Water Telemetry Cable Map
Attachment 4 – PG&E Impact Letter & Tree Guide
Attachment 5 – Soil Characterization Report
Attachment 6 – Sample Consultant Services Agreement
Page 7
Attachment 1
Project Location Map
No Sidewalks
Existing
Pinehurst Community Crosswalk
Garden Parcel
Proposed Pedestrian Path
Page 8
Attachment 2
Pinehurst Community Garden Sample Layout
Site Notes:
1.) Existing site grade to remain the same 6.) Double vehicle access gate – 16’ width. Keys to
2.) Garden Shed - ~7’ height be provided for PG&E & Valley Water access
3.) Meeting space to include benches, tables, umbrella 7.) 15’ minimum clearance around transmission
4.) Pedestrian gate – 5’ width. Keys to be provided for tower
PG&E & Valley Water access 8.) 2’ tall, raised planter beds ranging in sizes
5.) 6’ tall ornamental fence across site. Fence will meet between 4’x12’ – 6’x16’
all Town ordinances and requirements 9.) Water line to be added
10.) Storage shed space needed for mulch, compost,
and green waste
Page 9Attachment 3
Valley Water Telemetry Cable Map
Page 10Plan Review Team PGEPlanReview@pge.com
Land Management
Attachment 4
PG&E's Impact Letter & Tree Guide
February 3, 2023
Marina Chislett
Town of Las Gatos
41 Miles Ave
Los Gatos, CA 95030
RE: Los Gatos Community Garden
Pinehurst Avenue, Los Gatos, CA
Dear Marina Chislett,
Thank you for giving us the opportunity to review the subject plans. The proposed Los Gatos
Community Garden is within the same vicinity of PG&E’s existing facilities that impact this
property.
PG&E operates electric transmission facilities within an easement on this property, recorded in
Book 3112 at Page 41 of Sana Clara County records. Said easement is building restricted and
does not allow for the construction of any building or other structures within the easement area.
The Company intends to keep rights-of-way clear of all buildings and structures that might have
an adverse effect on Company facilities. The proposed sheds are in conflict and impact the
easement area.
On overhead electric transmission easements, plant only low-growing shrubs under the wire
zone and only grasses within the area directly below the tower. Along the border of the
transmission line right-of-way, plant only small trees no taller than 10-feet. PG&E must have
access to its facilities at all times, including access by heavy equipment. The proposed
orchard trees are in conflict and impact the easement area.
Please contact the Building and Renovation Center (BRSC) for facility map requests by
calling 1-877-743-7782 and PG&E’s Service Planning department at www.pge.com/cco for
any modification or relocation requests, or for any additional services you may require.
If you have any questions regarding our response, please contact me at
alexa.gardea@pge.com.
Sincerely,
Alexa Gardea
Land Management
916-760-5738
PG&E Gas and Electric Facilities Page 1
PublicTrees and shrubs
for power line-friendly
landscaping
Bay Area and InlandAt Pacific Gas and Electric Company
(PG&E), our most important responsibility
is the safety of our customers and the
communities we serve.
As part of that responsibility, we created
this guide to help you select the right
trees and shrubs when planting near
power lines. Planting the right tree in the
right place will help promote fire safety,
reduce power outages and ensure beauty
and pleasure for years to come.
Plan before you plant 1
How to plant and care for 4
your tree
Key characteristics of 6
recommended small trees
Keeping the lights on and 17
your community safe
2Plan before you plant
Consider these questions for successful planting:
1. What types of utility lines are near you? 3. Are there any underground
Planting restrictions for trees and other utility lines?
vegetation vary widely for different types To avoid contact with underground
of utility lines—electric transmission lines, utilities, call 811 at least two working
electric distribution lines and gas pipelines. days before digging. Workers will
visit your property free of charge to
2. Are you planting in a high fire-threat area? mark the location of gas lines or
If you live in an area designated as high fire other underground utilities so you can
threat by the California Public Utilities avoid them.
Commission (CPUC), you can take steps to
help reduce wildfire risks.
Learn which plants will thrive in your region. Refer to the Sunset Western Garden Book map below to
find your planting zone.
Bay Area and Inland Climate Zones: 7–9 and 14–17
14 7 9
14 15
14
15
15 9 7
17
16
17
17
9
15
7
9 14
14
17
16 9
8
Zone 7
17 14
Zone 8
17
Zone 9 15
Zone 14
7
Zone 15
Zone 16 16 15
Zone 17
MAP IS APPROXIMATE 7 14
1Plan before you plant
Planting with fire safety
in mind
You can help reduce wildfire risks by choosing A Planting outside of high fire-threat areas
the right plants, trees and shrubs and by
Planting restrictions for trees and other vegetation
following new vegetation and fire safety vary widely for different types of utility power lines—
standards that require greater clearances electric transmission, electric distribution and
between trees, limbs and power lines. gas pipelines. Please consider the following when
planting near:
Distribution power lines: Select only
Create defensible space small trees that will grow no taller than
In addition to maintaining a safe distance 25 feet at maturity.
between trees and power lines, we recommend
fire-resistant plants in high fire-threat areas. Transmission power lines: Plant only
Their purpose is to replace important plants for low-growing shrubs under the wire zone
wildlife in areas where brush and tree removal and only grasses within the area directly
can leave an area bare. below the tower. Along the border of the
transmission line right-of-way, plant only
Fire-resistant plant features include: small trees no taller than 10 feet.
• High moisture content
• Minimal buildup of dry vegetation
• Fewer branches and leaves
B Planting within high fire-threat areas
• Slow growing You play a vital role to ensure that the right tree
is safely planted in the right place. This planting
• Stems, leaves or needles that are not oily or waxy
guide will help you select a species of tree and
To learn more about high fire-threat areas visit appropriate planting location that is compatible
cpuc.ca.gov/FireThreatMaps with our safety clearances.
Small zone: Within 15 feet of the pole, plant only
low-growing plants less than 12 inches at maturity
that have high moisture and low sap content.
Medium zone: From 15 to 50 feet of the pole,
plant trees no taller than 40 feet at maturity.
Tall zone: At least 50 feet away from the pole,
plant trees taller than 40 feet at maturity.
Avoid Conflicts with Power Lines—Plant the Right Tree in the Right Place
Distribution Line Distribution Line Transmission
(outside high firethreat areas) (within high firethreat areas) Line
Large Shade Trees A B
Medium Large Shade Trees
Size Low
Trees Growing
Shrubs;
Small No No Trees in
Trees Trees Wire Zone
Tall Medium Small Wire Zone
Zone Zone Zone
Any incompatible or hazardous vegetation 50 ft. 15 ft.
is subject to removal.
2Plan before you plant
Proper tree and
site selection
Always consider tree size when
planting where space is limited— 1
near power lines, in narrow side
yards or close to buildings.
Small trees that grow no taller than
20 feet are the right choice.
4
2
1. When planting near distribution
lines in high fire-threat areas,
plant only low-growing, fire 3
resistant shrubs. 5
2. Small flowering trees or shrubs
add interest and beauty to the 6
landscape and may attract butterflies
and hummingbirds.
3. Many small tree species add curb appeal
and help improve your neighborhood.
4. Small trees produce fruit or nuts that
attract birds and other wildlife.
5. Small trees create hedges for privacy
or screening.
6. Small trees add interest and beauty to
small spaces.
When planting, you should AVOID:
Streets Transformers Power lines Safety tip for planting
1 Know what’s below
To remain safe while
planting trees, shrubs or
flowers, call 811 at least
two days before digging.
2 ft. Workers will visit your
property free of charge to
mark the location of gas lines
2 10 ft. 8 ft. or other underground utilities
8 ft.
so you can avoid them.
1 Blocking vision at street Planting closer than 8 feet Planting within 10 feet of
corners. Plant at least from the front and 2 feet the base of utility poles and
10 feet from the curb at from the back and sides of allowing vegetation that
corners. pad-mounted transformers. can grow more than 8 feet
above the ground.
2 Planting too close to
sidewalks, streets or 3
driveways.How to plant and care for your tree
1. Prepare the planting area. Mark an area 7. Fill the hole with original soil around the
several times wider than the root ball diameter. tree. Gently backfill the hole using one-third
Loosen this area to about the depth of the of the soil at a time. Break up dirt clods and
root ball. remove any grass, weeds or rocks. Lightly
pack the soil with the shovel handle to remove
2. Dig the hole. Shallow is better than deep. air pockets. Do not stamp on or compress
Ensure the sides of the hole are rough and soil heavily. The best soil for root growth has
uneven. In hard soils, a rough edge to the spaces for both air and water, but not large air
hole helps new roots grow out into the pockets. Refill and pack again until soil is even
surrounding soil. with top of root ball. The trunk flare should be
slightly above the soil. Water thoroughly.
3. Place the tree in the hole. The trunk flare • For trees not planted in a lawn, construct a
should be at or just above the soil surface. small earthen dam or berm, less than four
Planting too deep is the most common mistake inches tall, with excess soil just outside of
since soil above the trunk flare causes the the root ball zone. This will help hold water
bark to rot. until it soaks into the soil, rather than letting
• For containerized trees, gently remove the it run off. The berm is temporary while your
container from root ball. Don’t pull by the tree becomes established and, in most cases,
trunk. Loosen roots with finger tips and prune should be removed two years after planting.
away damaged or circling roots.
• For balled and burlapped trees, rest the 8. Cover the entire loosened area of soil. Use
root ball in the center of the hole. Reshape the three to four inches of mulch. Keep mulch away
hole if necessary so the tree will be straight from the trunk of the tree to prevent disease.
and at the proper level. Carefully, remove the
burlap and any other material away from the 9. Stake only if tree stability is a problem.
sides and top of the root ball. Staking is a temporary measure to allow the
trunk to develop strength. The sooner the
4. Loosen the soil near the trunk. Find the stakes and ties are removed the stronger your
trunk flare, which should be visible at the top tree will be. If staked, typically this should be
of the root ball. If the trunk flare is not visible, one to two years and no longer than three.
remove soil from the top of the root ball until Reddy Stakes are the easiest to use and are
it is visible. available from your local nursery.
5. Tree adjustments. Stand back and look at 10. Water: New trees need about 1 inch of water
the tree before putting soil back into the hole. per week for about two years. This is true for
Careful adjustments can be made at this time all trees including native and drought tolerant.
to the planting height and the direction the Be careful not to drown the roots; they need air
branches face without seriously harming to grow as well. Water slowly by hand.
the roots.
6. Do not add fertilizer at time of planting.
Do not add compost or other material to the
hole. Fertilizer may be added at the drip line
of the tree after the first year if poor growth is
experienced. Follow fertilizer manufacturer’s
instructions; too much will injure or kill the tree.
4How to plant and care for your tree
Planting basics
A. Dig hole no deeper than root ball.
B. Bottom of root ball on firm soil.
C. Top of root ball level with or F
slightly above ground. E G
C
D. Backfill with original soil,
tamping gently and watering
briefly when filling hole.
E. Mulch 3–4 inches deep in circle
around tree. D
A B
F. Keep mulch away from trunk.
G. If not planting in a lawn, build a Make hole several times
soil dam 3–4 feet from trunk. wider than root ball.
Young tree pruning
-
B
A
A. Remove limbs that extend beyond
the natural crown of the tree.
C B. Remove competing stems to
develop a single trunk.
D C. Remove dead, broken or
crossing limbs.
D. Remove limbs that turn inward
towards the trunk.
E. Do not leave branch stubs.
F. Remove root suckers and sprouts.
G. Shorten low branches to develop
E G trunk thickness.
F
Remove branches shown with dotted lines
-
-
5Key characteristics of recommended small trees
(Reference zone map on page 1)
Weeping Bottlebrush Buttonbush
Callistemon viminalis Cephalanthus occidentalis
A beautiful tropical tree that produces scarlet blossoms Produces unusual flowers that smell like
March through July, this tree attracts hummingbirds honey and attract butterflies and hummingbirds.
and is drought tolerant. It is ideal for creating high Its seeds provide wildlife food, especially for ducks,
hedges that screen views. Not suitable for windy areas and its thick foliage provides habitat for many
or near the street. Grows well in restricted soil space. wetland birds. Useful for naturalizing wet areas.
Mature height: 25 feet. Zones 8–9, 14–17. Mature height: 20 feet. Zones 7–9, 14.
EVERGREEN DECIDUOUS, CALIFORNIA NATIVE
Fire-resistant FULL SUN–PARTIAL SHADE NOT fire-resistant FULL SUN–PARTIAL SHADE
California Buckeye Camellia Reticulata
Aesculus californica Camellia reticulata
This tree, native to the dry slopes of the Coast The main decorative feature is its spectacular
Ranges and Sierra Nevada foothills, makes an flowers, which bloom January through May.
excellent choice for low water use areas. In spring, This tree is very susceptible to cold. It develops
fragrant, cream-colored flower plumes transform better form and heavier foliage in open ground.
it into a giant candelabra. Following winter leaf drop, Good for shrub borders and screens.
its silvery bark creates an interesting silhouette.
Mature height: 20 feet. Zones 7–9, 14–17.
Mature height: 25 feet. Zones 7–9, 14–17. EVERGREEN
DECIDUOUS, CALIFORNIA NATIVE
Fire-resistant PARTIAL–FULL SHADE
Fire-resistant FULL SUN–PARTIAL SHADE
6Key characteristics of recommended small trees (Reference zone map on page 1)
Kwanzan Cherry Cordia
Prunus serrulata ‘Kwanzan’ Cordia boissieri
A beautiful decorative flowering tree with Wild olive is a native North American evergreen
yellow fall color, this cherry does not bear fruit. tree reportedly close to extinction. White flowers
Often used near a patio or as a specimen away appear year-round and olive-like fruit attracts birds
from lawn grass competition, this tree is not and other wildlife. Good near a deck or patio, in
suitable for planting near the street. sidewalk cutouts and as a street tree.
Mature height: 25 feet. Zones 7, 14–17. Mature height: 20 feet. Zones 8–9, 14–17.
DECIDUOUS EVERGREEN, NORTH AMERICAN NATIVE
Fire-resistant FULL SUN–PARTIAL SHADE NOT fire-resistant FULL SUN–PARTIAL SHADE
Cockspur Coral Tree Hopa Crabapple
Erythrina crista-galli Malus hopa
This beautiful, showy tree, which boasts Grown for its adaptability, fragrant flowers and
brilliant red and fragrant flowers in spring, attractive, brightly colored fruit, this tree creates
attracts hummingbirds. It is widely planted a warm glow of color each spring. It bears edible
as a street or garden tree. fruit and attracts wildlife. Good for sidewalk
Mature height: 20 feet. Zones 7–9, 14–17. cutouts and as a street tree.
DECIDUOUS Mature height: 25 feet. Zones 7–9, 14–17.
DECIDUOUS
NOT fire-resistant FULL SUN
NOT fire-resistant FULL SUN–PARTIAL SHADE
7Key characteristics of recommended small trees (Reference zone map on page 1)
Crape Myrtle Dragon Tree
Lagerstroemia indica Dracaena draco
This is among the longest blooming trees in Native to the Canary Islands, this palm-like,
existence, with striking summer color and tropical tree grows slowly and can live for
attractive fall foliage. It is a favorite small tree hundreds of years. It is drought tolerant and
for landscaping. It is drought tolerant and well makes a dramatic statement in landscaping.
suited as a buffer near a street, deck or patio. It is a good choice for coastal areas since it
Mature height: 25 feet. Zones 7–9, 12–14. tolerates salty spray and soils.
DECIDUOUS Mature height: 25 feet. Zones 16–17.
EVERGREEN
NOT fire-resistant FULL SUN
NOT fire-resistant PARTIAL SHADE
Weeping Dogwood Fringe Tree
Cornus florida Chionanthus virginicus
This is one of the most popular decorative trees One of the most beautiful small trees when
and earliest springtime bloomers. It produces in full bloom, its purple-blue fruits attract many
a non-edible fruit that attracts butterflies, birds birds and other wildlife. Famous for its sweet but
and other wildlife. Use dogwood as a framing or not overpowering fragrance, it is most commonly
background tree. used as a free standing decorative tree.
Mature height: 25 feet. Zones 7–9, 14–16. Mature height: 25 feet. Zones 15–17.
DECIDUOUS DECIDUOUS, NORTH AMERICAN NATIVE
NOT fire-resistant PARTIAL–FULL SHADE NOT fire-resistant FULL SUN–PARTIAL SHADE
8Key characteristics of recommended small trees (Reference zone map on page 1)
Golden Ball Lead Tree Washington Hawthorn
Leucaena retusa Crataegus phaenopyrum
Bright yellow powder-puff blossoms appear The small white, abundant flowers in spring
April through October. They are prominent after are followed by orange to red fruit that lasts until
heavy rain and attract butterflies and wildlife. winter and attracts birds. The fall leaf color is
It seeds itself, spreads rapidly and is drought striking orange and red. Well suited for creating
tolerant. Good as an accent tree in a shrub a barrier or as a street tree.
border or backyard garden.
Mature height: 25 feet. Zones 7–9, 14–17.
Mature height: 25 feet. Zones 7–9, 14–17. DECIDUOUS, NORTH AMERICAN NATIVE
EVERGREEN, NORTH AMERICAN NATIVE
NOT fire-resistant FULL SUN
NOT fire-resistant FULL SUN
Pineapple Guava Yaupon Holly
Feijoa sellowiana Ilex vomitoria
Hardiest of the subtropic trees, it blossoms Tiny white flowers, which appear in spring, attract
in spring and produces fruit in late summer bees for several weeks. Bright red berries appear
and early fall. Both flowers and fruit are edible fall through winter and attract wildlife. Commonly
and attract birds and bees. The plants can be used as a trimmed hedge, screen or windbreak.
pruned into a small tree or a hedge. Well suited as a topiary.
Mature height: 20 feet. Zones 7–9, 14–17. Mature height: 20 feet. Zones 7–9, 14–17.
EVERGREEN EVERGREEN, NORTH AMERICAN NATIVE
NOT fire-resistant FULL SUN–PARTIAL SHADE NOT fire-resistant FULL SUN–PARTIAL SHADE
9Key characteristics of recommended small trees (Reference zone map on page 1)
Kumquat Bronze Loquat
Fortunella margarita Eriobotrya deflexa
Fragrant flowers, which blossom in late Small white, fragrant flowers appear in spring
spring, attract butterflies and become fruit followed by small, inedible fruits. Leaves are a
that look like tiny oranges in the fall. Great bright red-bronze or coppery color. Well suited as
ornamental element in a landscape. a decorative tree near the street or a shade tree
Mature height: 25 feet. Zones 8–9, 14–17. for a patio or deck.
EVERGREEN Mature height: 25 feet. Zones 7–9, 14–17.
EVERGREEN
NOT fire-resistant FULL SUN
NOT fire-resistant FULL SUN–PARTIAL SHADE
Lemon Tree Little Gem Magnolia
Citrus limon Magnolia grandiflora x ‘little gem’
Dark green foliage and pure white, extremely Fragrant white blossoms open to perfume the
fragrant blossoms make citrus a popular garden entire garden in late spring and turn into fuzzy brown
choice for frost-free locations. Juicy, fragrant cones with bright red seeds, which are used by a
edible fruit ripens in fall and winter. Well suited variety of wildlife. Well suited for a screen or hedge.
for shade or as a screen. Mature height: 20 feet. Zones 7–9, 14-17.
Mature height: 25 feet. Zones 8–9, 14–17. EVERGREEN
EVERGREEN
NOT fire-resistant FULL SUN
Fire-resistant FULL SUN
- 10Key characteristics of recommended small trees (Reference zone map on page 1)
Saucer Magnolia Amur Maple
Magnolia x soulangeana Acer ginnala
Blooms open late winter to early spring producing Its main decorative value is in its brilliant red fall
a display of large white flowers shaded in pink. foliage and pink/red-winged fruit. It is well suited
Can be used near a patio or deck. Best used as a as a patio tree, hedge or screen.
stand-alone specimen in a sunny spot.
Mature height: 25 feet. Zones 7–9, 14–16.
Mature height: 25 feet. Zones 7–9, 14–17. DECIDUOUS
DECIDUOUS NOT fire-resistant FULL SUN–PARTIAL SHADE
NOT fire-resistant FULL SUN–PARTIAL SHADE
Manzanita Japanese Maple
Arctostaphylos manzanita Acer palmatum
Popular for shiny red or mahogany colored bark, Famous for its striking display of fall color
its pink to white flowers attract wildlife and provide when leaves turn brilliant shades of scarlet,
nectar to butterflies and hummingbirds. It is very yellow or orange, it is one of the most beautiful
drought tolerant and looks green even in the hottest, small trees for the landscape. Well suited as
driest part of the summer. Good for hillside covers, an accent tree.
background plantings and screens.
Mature height: 25 feet. Zones 7–9, 14–17.
Mature height: 20 feet. Zones 7–9, 14–17. DECIDUOUS
EVERGREEN, CALIFORNIA NATIVE
NOT fire-resistant PARTIAL–FULL SHADE
Fire-resistant FULL SUN–PARTIAL SHADE 11Key characteristics of recommended small trees (Reference zone map on page 1)
Pinyon Pine
Rattan Palm Pinus edulis
Rhapis humilis
This rugged conifer is best known for its edible
A hardy, slow growing and graceful-looking pine nuts. This pine grows slowly and does not
palm variety, it is especially well suited as a dense overwhelm the surrounding area. It is more drought
screen or hedge or accent tree. and wind tolerant than other pines. It provides good
Mature height: 20 feet. Zones 16–17. cover for wildlife. The tree works well in small, dry
EVERGREEN gardens and can be used to screen unwanted views,
as a windbreak or an accent tree.
NOT fire-resistant PARTIAL–FULL SHADE
Mature height: 25 feet. Zones 7–9, 14–17.
EVERGREEN, CALIFORNIA NATIVE
NOT fire-resistant FULL SUN–PARTIAL SHADE
Purple-Leaf Plum
Sonoran Palo Verde Prunus cerasifera ‘Newport’
Cercidium praecox
Very popular for its unusual changing leaf color,
Valued for its yellow floral display in spring, which starts out ruby red, then turns reddish-purple,
this plant is attractive to bees, butterflies and and finally greenish-bronze. The small white to
birds. It does well in arid climates and is tough light pink blossoms are followed by a crop of small,
and trouble-free. Well suited for streetscape edible purple fruit. Often used as a decorative
plantings or as an accent tree. landscape element, it is good near patios and decks.
Mature height: 20 feet. Zones 14–17. Only plant the smaller ‘Newport’ or ‘Thundercloud’
DECIDUOUS, NORTH AMERICAN NATIVE varieties near power lines.
NOT fire-resistant FULL SUN Mature height: 25 feet. Zones 7–9, 14–17.
DECIDUOUS
Fire-resistant FULL SUN–PARTIAL SHADE 12Key characteristics of recommended small trees (Reference zone map on page 1)
Eastern Redbud Tangelo
Cercis canadensis Citrus reticulata x citrus maxima
Blossoms appear all over the tree in spring Fragrant white flowers appear March through
followed by beans, which provide food for April and attract honeybees and butterflies.
hummingbirds and other wildlife. Not suitable Edible, orange-colored fruit matures September
as a street tree but well suited as an accent plant. through December. The best fruit is produced
in warm summer areas. Well suited as an
Mature height: 25 feet. Zones 7–9, 14–17.
ornamental accent tree.
DECIDUOUS, NORTH AMERICAN NATIVE
Mature height: 25 feet. Zones 8–9, 14–15.
NOT fire-resistant FULL SUN–PARTIAL SHADE
EVERGREEN
-
Fire-resistant FULL SUN
American Smoke Tree Tasmanian Tree Fern
Cotinus obovatus Dicksonia antarctica
Long flowers have a fluffy, grayish-buff Best known and hardiest of tree ferns, it has
appearance resembling a cloud. One of the best a dark brown trunk and dark green, lacy fronds
plants for fall color with orange, purple, red and that arch five to seven feet. Easy to transplant and
yellow leaves. Best used in a shrub border or as establish, it makes a beautiful accent tree for a
a patio or accent tree. tropical effect or can be a backdrop to other plants.
Mature height: 25 feet. Zones 7–9, 14–17. Mature height: 20 feet. Zones 8–9, 14–17.
DECIDUOUS, NORTH AMERICAN NATIVE EVERGREEN
NOT fire-resistant FULL SUN–PARTIAL SHADE NOT fire-resistant PARTIAL–FULL SHADE
-
13Key characteristics of recommended small trees (Reference zone map on page 1)
Tea Tree Common Witch Hazel
Leptospermum petersonii Hamamelis virginiana
Leaves have a strong lemon scent and when dried The bark of this slow growing, drought tolerant
are used to make tea. Small white flowers bloom in plant is the source of the liniment witch hazel. It has
spring to early summer. This is a fast-growing plant bright foliage and yellow and red bloom clusters in
well suited for hedges, screening unwanted views the fall. It is well suited for borders and naturalistic,
or as a windbreak. shady areas.
Mature height: 20 feet. Zones 14–17. Mature height: 25 feet. Zones 7–9, 14–16.
EVERGREEN DECIDUOUS, NORTH AMERICAN NATIVE
NOT fire-resistant FULL SUN–PARTIAL SHADE NOT fire-resistant FULL SUN–PARTIAL SHADE
Toyon IMPORTANT NOTE: This guide makes
Heteromeles arbutifolia recommendations for planting small trees
near distribution lines only.
Also known as “Christmas Berry” or “California
Holly,” this evergreen is native to California Coast Near or under transmission lines, plant
Ranges and is great in butterfly and bird gardens. only low-growing shrubs. Any incompatible
Drought resistant and low maintenance, it blooms vegetation is subject to removal.
in summer and bears beautiful red berries in winter.
It is well suited for hedges, screens for unwanted If you are not sure if a power line is
views or as an accent tree. distribution or transmission, please call us
at 1-800-743-5000.
Mature height: 25 feet. Zones 7–9, 14–17.
EVERGREEN, CALIFORNIA NATIVE
NOT fire-resistant FULL SUN–PARTIAL SHADE
14Key characteristics of recommended small trees
The following is a guide to small trees suitable near distribution power lines
in areas that are not at high risk for wildfire. Work with your local nursery to
identify other suitable plants for your specific planting zone.
Common/Scientific name Mature ht. Growth/yr. Soil Wildlife attraction and flower facts
Bottlebrush, Weeping 25 feet 36 inches Wet– Hummingbirds, screening, drought tolerant.
Callistemon viminalis Dry RED FLOWERS
Buckeye, California** 25 feet 24 inches Moist– Hummingbirds, provides screening, blooms in spring.
Aesculus californica Dry WHITE, FRAGRANT FLOWERS
Buttonbush** 20 feet 24–36 Wet– Hummingbirds, butterflies, wildlife habitat.
Cephalanthus occidentalis inches Moist CREAM OR WHITE, FRAGRANT FLOWERS
Camellia Reticulata 20 feet 12–24 Moist Decorative, provides screening, not suitable for cold
Camellia reticulata inches environment. PINK, RED FLOWERS
Cherry, Kwanzan 25 feet 24 inches Moist Fall color, no fruit, not suitable for street planting.
Prunus serrulata ‘Kwanzan’ PINK OR ROSE, FRAGRANT FLOWERS
Cockspur Coral Tree 20 feet 24 inches Moist– Hummingbirds, good for streets and gardens.
Erythrina crista-galli Dry PINK OR RED, FRAGRANT FLOWERS
Cordia* 20 feet 24 inches Moist– Birds and wildlife, good for streets and patios.
Cordia boissieri Dry YELLOW OR WHITE, FRAGRANT, YEAR-ROUND FLOWERS
Crabapple, ‘Hopa’ 25 feet 36 inches Moist Wildlife, edible fruit, good for streets and sidewalk
Malus ‘hopa’ cutouts. RED OR ROSE, FRAGRANT FLOWERS
Crape Myrtle 25 feet 24 inches Moist– Long blooming period, fall color, good for narrow
Lagerstroemia indica Dry lawns, drought tolerant.
RED, PINK, PURPLE OR WHITE FLOWERS
Dogwood, Weeping 25 feet 24 inches Moist Butterflies and wildlife, blooms in early spring.
Cornus florida WHITE, FRAGRANT FLOWERS
Dragon Tree 25 feet 12 inches Moist Slow growing, long lasting, drought tolerant.
Dracaena draco CHARTREUSE OR WHITE FLOWERS
Fringe Tree* 25 feet 12 inches Moist Birds and wildlife, decorative free-standing tree.
Chionanthus virginicus GREEN OR WHITE, FRAGRANT FLOWERS
Golden Ball Lead Tree* 25 feet 12–36 Well Butterflies and wildlife, accent tree, drought tolerant.
Leucaena retusa inches Drained YELLOW FLOWERS
Guava, Pineapple 20 feet 24 inches Moist– Birds and bees, blooms in spring, edible flower and
Feijoa sellowiana Dry fruit. PURPLE, RED OR WHITE FLOWERS
Hawthorn, Washington* 25 feet 24 inches Moist– Wildlife, good screen or street tree.
Crataegus Dry WHITE FLOWERS
Holly, Yaupon* 20 feet 24 inches Moist Bees and wildlife, good hedge or screen.
Ilex vomitoria TINY, WHITE FLOWERS
Kumquat 25 feet 24 inches Moist Butterflies, edible fruit, decorative.
Fortunella margarita WHITE, FRAGRANT FLOWERS
Chart continued on next page
15Key characteristics of recommended small trees
Common/Scientific name Mature ht. Growth/yr. Soil Wildlife attraction and flower facts
Lemon Tree 25 feet 24 inches Moist Edible fruit, good for shade or screening.
Citrus limon WHITE, FRAGRANT FLOWERS
Loquat, Bronze 25 feet 36 inches Moist Birds and wildlife, good for patios and decks.
Eriobotrya deflexa WHITE, FRAGRANT FLOWERS
Magnolia, Little Gem 20 feet 12 inches Moist Wildlife, provides a dense screen.
Magnolia grandiflora x ‘little gem’ WHITE, FRAGRANT FLOWERS
Magnolia, Saucer 25 feet 24 inches Moist Birds.
Magnolia x soulangeana PINK, PURPLE OR WHITE, FRAGRANT FLOWERS
Manzanita** 20 feet 12–24 Moist– Butterflies, hummingbirds and wildlife, colorful bark.
Arctostaphylos manzanita inches Dry PINK OR WHITE FLOWERS
Maple, Amur 25 feet 12–24 Moist– Fall color, good for patios and decks, hedge or screen.
Acer ginnala inches Dry YELLOW, FRAGRANT FLOWERS
Maple, Japanese 25 feet 12–24 Moist– Fall color, good as accent tree.
Acer palmatum inches Well PURPLE FLOWERS
Drained
Palm, Rattan 20 feet 12 inches Moist Good screen or hedge, decorative, drought tolerant.
Rhapis humilis INCONSPICUOUS FLOWERS
Palo Verde, Sonoran* 20 feet 36 inches Moist– Bees, butterflies and birds, smooth green bark,
Cercidium praecox Dry blooms in spring, drought tolerant. YELLOW FLOWERS
Pine, Pinyon** 25 feet 12 inches Moist– Wildlife habitat, edible seeds, drought and wind
Pinus edulis Dry tolerant. INCONSPICUOUS FLOWERS
Plum, Purple-Leaf 25 feet 24 inches Moist Winter and spring floral display, edible fruit,
Prunus cerasifera ‘Newport’ self-sowing. PINK OR WHITE, FRAGRANT FLOWERS
Redbud, Eastern* 25 feet 36 inches Moist Hummingbirds and wildlife.
Cercis canadensis PINK OR ROSE FLOWERS
Smoke Tree, American* 25 feet 12–24 Well Fall color.
Cotinus obovatus inches Drained PINK OR WHITE, SMOKE-LIKE EFFECT FLOWERS
Tangelo 25 feet 24 inches Moist Bees and butterflies, blooms in spring, edible fruit.
Citrus reticulata x citrus maxima WHITE, FRAGRANT FLOWERS
Tasmanian Tree Fern 20 feet 12 inches Moist Cold tolerant, easy to transplant and establish,
Dicksonia antarctica good as an accent. NO FLOWERS
Tea Tree 20 feet 24 inches Moist– Fragrant leaves, good for hedges, screening and
Leptospermum petersonii Dry as a windbreak. WHITE FLOWERS
Toyon** 25 feet 12–24 Moist– Butterflies, hummingbirds and wildlife, drought
Heteromeles arbutifolia inches Dry tolerant. WHITE FLOWERS
Witch Hazel, Common* 25 feet 12–24 Moist Fall foliage and flowers, drought tolerant.
Hamamelis virginiana inches YELLOW, FRAGRANT FLOWERS
*North American Native
**California Native
16Keeping the lights on and your community safe
At PG&E our most important responsibility
is the safety of our customers and the
communities we serve. We know how much
trees mean to our communities, and we are
committed to helping you ensure the right
trees are located in the right places to help
reduce wildfire risks and improve public safety.
Every year, we inspect each segment of approximately
100,000 miles of overhead power lines, with some locations
patrolled multiple times a year. We prune or remove 1.4 million
trees annually and work to address dead and dying trees in
areas affected by drought.
By planting the right tree in the right place, you can help reduce
fire hazards, promote safety and reduce the risk of damage to
properties and power lines.
17For more information regarding tree planting near power
lines or gas pipelines and to download a copy of this booklet,
please visit: pge.com/righttreerightplace.
To verify the type of utility line near you, schedule an
appointment with our tree care professionals or request gas
pipeline planting information, please call 1-800-743-5000.
Additional references
and resources:
PG&E Vegetation Management Program:
pge.com/trees
Planting the right tree in the right place:
arborday.org/trees/righttreeandplace
High Fire-Threat District Map:
cpuc.ca.gov/FireThreatMaps
California Tree Selections:
selectree.calpoly.edu
Climate Zone maps and information are courtesy
of Sunset Western Garden Book, 2008.
Illustrations Copyright © 2019 Robert O’Brien
“PG&E” refers to Pacific Gas and Electric Company, a subsidiary of PG&E Corporation ©2019 Pacific Gas and Electric Company. All rights reserved. CCR-0919-1604W 18Attachment 5
Soil Characterization Report
April 28, 2022
Project No. 404175001
Ms. Janice Chin, Assistant Engineer
City of Los Gatos Parks and Public Works Department
41 Miles Avenue, Los Gatos, California 95030
Subject: Additional Soil Characterization Letter Report
Pinehurst Avenue Community Garden
Los Gatos, California 95030
Dear Ms. Chin:
Ninyo & Moore is pleased to provide this Additional Soil Characterization Letter Report for the
additional soil sampling conducted at the Pinehurst Community Gardens proposed redevelopment
area located on Pinehurst Avenue between Lynn Avenue and Blossom Valley Drive in Los Gatos,
California (site, Figure 1). Ninyo & Moore understands that this land is currently a vacant lot that the
City of Los Gatos plans to redevelop into a community garden. The objectives of this investigation
were to assess the lateral and vertical extent of soil impacts from constituents of concern, including
organochlorine pesticides (OCPs). The sampling was conducted in accordance with our proposal for
Additional Soil Sampling (09OAK03-01286), dated December 14, 2021 and based on the
conclusions and recommendations presented in the Ninyo & Moore’s March 3, 2022 Soil
Characterization Letter Report 1.
SOIL SAMPLING AND ANALYSES
Pre-Field Activities
Ninyo & Moore marked the vicinity of proposed hand auger boring locations with white paint and/or
stakes and notified Underground Service Alert (USA) at least 72 hours prior to the start of subsurface
disturbance activities, as required by California law. USA notified utility companies of the planned
activities and requested that they mark their subsurface utilities within the proposed boring locations
by the proposed date.
1
Ninyo & Moore, 2022 Soil Characterization Letter Report, Pinehurst Avenue Community Garden, Los Gatos, California 95030. Dated
March 3.
2020 Challenger Drive, Suite 103 | Alameda, California 94501 | p. 510.343.3000 | www.ninyoandmoore.comNinyo & Moore updated the Site-specific health and safety plan (HASP) to protect Site workers and the general public from the potential hazards associated with hand augering, dust generated by sampling activities, and associated work being performed during field activities. The HASP included a map to the closest medical emergency facility. Ninyo & Moore reviewed the HASP with field personnel prior to the start of field work and field personnel signed the acknowledgement form attached to the HASP, indicating they understood and would abide by its provisions. Soil Sampling On April 1 and 4, 2022, Ninyo & Moore advanced four hand auger soil borings (B-4N, B-4S, B-4E, and B-4W) to a depth of approximately 3 feet below ground surface (bgs) at approximately 10 feet around previous boring B-4 to further delineate the lateral extent of OCPs detected in soil at B-4. At the boring B-4 location, one additional hand auger boring was advanced to a depth of 3 feet bgs to vertically delineate OCP concentrations. The approximate boring locations are shown on Figure 2. Two soil samples were collected from each of the boring locations at B-4N, B-4S, B-4E, and B-4W at depths of 1.5 feet and 3.0 feet bgs and one soil sample was collected from boring B-4 at 3.0 feet bgs using a 2.75 inch-diameter hand auger. The hand auger was decontaminated with a rinse of Alconox® and water, followed by two rinses with distilled water, between each boring location. Upon completion of the field activities, the borings were backfilled with the soil cuttings. The soil samples were transferred into laboratory-supplied glass containers, labeled with sample identifications, and stored in a cooler containing ice. The soil samples were transported under chain- of-custody (COC) documentation to Torrent Laboratory, a California-certified analytical laboratory, located in Milpitas, California. Soil Sample Analyses The nine soil samples collected were analyzed for the following constituents: • Organochlorine pesticides (OCPs), using EPA Method 8081A and; • Title 22 Metals using EPA Method 6010B and 7471. Based on the results of the metal concentrations, two additional samples were analyzed for Soluble Threshold Limit Concentration (STLC), waste extraction test (WET) for solubility to characterize the soil for disposal. Ninyo & Moore | Pinehurst Community Garden, Los Gatos, California | 404175001 | April 28, 2022 2
LABORATORY ANALYTICAL RESULTS
Table 1 presents laboratory analytical data for Title 22 Metals, and Table 2 presents data for OCPs.
The results are discussed below. The laboratory analytical reports, including COC documentation,
are provided as Attachment A.
Reported concentrations were compared to San Francisco 2019 San Francisco Bay Regional Water
Quality Control Board (RWQCB) Tier 1 Environmental Screening Levels (ESLs) 2. Concentrations of
arsenic have been compared to the background concentration in the Bay Area of 11 milligrams per
kilogram (mg/kg), which has been accepted by the RWQCB 3. Results were also compared to
California Code of Regulations (CCR) Title 22 (Chapter 11 Article 3-1) Characteristics of Hazardous
Waste 4.
OCPs
Concentrations of four OCPs (gamma-Chlordane, alpha-Chlordane, 4,4’-DDT, and Chlordane) were
detected above their respective laboratory reporting limits. Detections exceeding ESLs are
discussed below:
• 4,4’ DDT was detected in three of four step out samples collected from a depth of 1.5 feet bgs
at concentrations ranging from 4.8 to 7.6 µg/kg and in all samples collected from a depth of 3.0
feet bgs at concentrations ranging from 1.86 to 6.5 µg/kg. All detected concentrations exceed
the Tier 1 ESL (Terrestrial Habitat) of 1.1 µg/kg.
• Chlordane was detected in two samples collected from a depth of 3.0 feet bgs (45 µg/kg in B-
4N-3 and 28 µg/kg in B-4S-3). Both of these concentrations exceed the Tier 1 ESL (Terrestrial
Habitat) of 8.5 µg/kg.
Metals
Concentrations of nine metals (arsenic, barium, cadmium, cobalt, copper, lead, nickel, vanadium,
and zinc) were detected above the laboratory reporting limits during this assessment.
• Arsenic was detected at all boring locations at concentrations ranging from 3.31 milligrams per
kilogram (mg/kg) to 3.78 mg/kg. These concentrations do not exceed the Bay Area background
concentration of 11 mg/kg.
2 San Francisco Bay Regional Water Quality Control Board, Environmental Screening Levels, 2019. Rev.2.
3
Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region, Dylan Duverge,
December 2011.
4 California Code of Regulations (CCR) Title 22 (Chapter 11 Article 3-1) Characteristics of Hazardous Waste.
Ninyo & Moore | Pinehurst Community Garden, Los Gatos, California | 404175001 | April 28, 2022 3You can also read
