Exhibit 21 - Revised Mitigated Negative Declaration in Response to Public Review CommentsRevised Mitigated Negative Declaration 1 EMC Planning Group
143 & 151 E. Main Street Mixed Use Project March 2025
REVISED MITIGATED NEGATIVE DECLARATION
In Compliance with the
California Environmental Quality Act (CEQA)
Project Name 143 & 151 E. Main Street Mixed Use Project
Lead Agency Town of Los Gatos
Project Proponent CSPN LLC
Project Location 143 & 151 E Main Street, Los Gatos
Project Description The project proposes to demolish the existing on-site uses
and construct a four-story mixed-use building with
underground parking. The ground level of the proposed
building will include 2,416 square feet of pedestrian-oriented
commercial with a total of 30 residential units (24 market
rate and 6 affordable) located on all stories of the building.
There are two options for the underground parking:
Option 1 is a two-level parking garage with 47 individual
parking stalls and Option 2 is a one-level parking garage with
39 parking stalls that include 16 car stackers. The project
involves the removal of three existing on-site trees and
planting 21 new on-site trees.
Public Review Period February 28, 2025 – March 20, 2025
Written Comments To Ryan Safty, Associate Planner
110 E. Main Street
Los Gatos, CA 95030
Proposed Findings The Town of Los Gatos is the custodian of the documents
and other material that constitute the record of proceedings
upon which this decision is based.
The initial study indicates that the proposed project has the
potential to result in significant adverse environmental
impacts. However, the mitigation measures identified in the
initial study would reduce the impacts to a less than
significant level. There is no substantial evidence, in light of
the whole record before the lead agency Town of Los Gatos
that the project, with mitigation measures incorporated, may
have a significant effect on the environment. See the
following project-specific mitigation measures:
EXHIBIT 21
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143 & 151 E. Main Street Mixed Use Project March 2025
Mitigation Measures
Air Quality
AQ-1 The applicant shall prepare a Construction Management Plan for review and approval by
the Town of Los Gatos Community Development Department prior to the start of any
ground-disturbing activities, including tree removal. The Construction Management Plan
shall include the following measures to reduce toxic air contaminant emissions during
construction:
a. Heavy-duty diesel vehicles will have 2010 or newer model year engines, in compliance
with the California Air Resources Board’s Truck and Bus Regulation;
b. Idling of construction equipment and heavy-duty diesel trucks will be avoided where
feasible, and if idling is necessary, it will not exceed three minutes;
c. All construction equipment will be maintained and properly tuned in accordance with
manufacturer’s specifications and will be checked by a certified visible emissions
evaluator; and
d. All non-road diesel construction equipment will, at a minimum, meet Tier 3 emission
standards listed in the Code of Federal Regulations Title 40, Part 89, Subpart B,
§89.112. Further, where feasible, construction equipment will use alternative fuels
such as compressed natural gas, propane, electricity, or biodiesel.
AQ-2 The project applicant shall ensure that MERV 13 air filtration systems, or an equivalent
system, are included in the design and operations of the proposed project. Prior to the
issuance of building permits, the applicant shall submit detailed plans and specifications
demonstrating compliance with this requirement to the Town of Los Gatos Building
Department for review and verification. These plans shall identify the locations and
specifications of the air filtration systems and confirm they meet the performance
standards for particulate and airborne pollutant removal.
The air filtration systems must be operational prior to the issuance of a certificate of
occupancy. Verification of proper installation and functionality shall be conducted by a
licensed professional and documented in a final compliance report, which must be
submitted to the Town of Los Gatos Building Department for approval. The property
owner or operator shall also establish a maintenance plan for the air filtration system to
ensure ongoing performance in accordance with manufacturer specifications.
Biological Resources
BIO-1 To avoid impacts to nesting birds during the nesting season (January 15 through
September 15), all construction activities within or adjacent to the project site boundary
that include any tree or vegetation removal, demolition, or ground disturbance (such as
grading or grubbing) should be conducted between September 16 and January 14, which
is outside of the bird nesting season. If this type of construction or project-related work is
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scheduled during the nesting season (February 15 to August 30 for small bird species
such as passerines; January 15 to September 15 for owls; and February 15 to September
15 for other raptors), a qualified biologist shall conduct nesting bird surveys.
a. One survey for active bird nests shall occur within 48 hours prior to ground
disturbance. Appropriate minimum survey radii surrounding each work area are
typically 250 feet for passerines, 500 feet for smaller raptors, and 1,000 feet for larger
raptors. The survey shall be conducted at the appropriate time of day to observe
nesting activities. Locations off the site to which access is not available may be
surveyed from within the site or from public areas. If no nesting birds are found, a
letter report confirming absence will be prepared and submitted to the Town of Los
Gatos Community Development Department and no further mitigation is required.
b. If the qualified biologist documents active nests within the project site or in nearby
surrounding areas, an appropriate buffer between each nest and active construction
shall be established. The buffer shall be clearly marked and maintained until the
young have fledged and are foraging independently. Prior to construction, the
qualified biologist shall conduct baseline monitoring of each nest to characterize
“normal” bird behavior and establish a buffer distance, which allows the birds to
exhibit normal behavior. The qualified biologist shall monitor the nesting birds daily
during construction activities and increase the buffer if birds show signs of unusual
or distressed behavior (e.g., defensive flights and vocalizations, standing up from a
brooding position, and/or flying away from the nest). If buffer establishment is not
possible, the qualified biologist or construction foreman shall have the authority to
cease all construction work in the area until the young have fledged and the nest is
no longer active. Once the absence of nesting birds has been confirmed, a letter
report will be prepared and submitted to the Town of Los Gatos.
BIO-2 Per Town Code Section 26.20.010 and Chapter 29, Article 1, Division 2, the developer
shall obtain a tree removal permit prior to the removal of protected trees on private or
Town property. The project developer shall abide by any tree replacement ratios and/or
in-lieu payments, tree protection measures, and best management practices required by
the tree removal permit and/or within the arborist report dated October 24, 2024
(Appendix D).
Cultural Resources
CUL-1 The following language shall be incorporated into any plans associated with tree removal,
grading, and construction, “In the event that archaeological resources are encountered
during ground disturbing activities, contractor shall temporarily halt or divert excavations
within 50 meters (165 feet) of the find until it can be evaluated. All potentially significant
archaeological deposits shall be evaluated to demonstrate whether the resource is eligible
for inclusion on the California Register of Historic Resources, even if discovered during
construction. If archaeological deposits are encountered, they will be evaluated and
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mitigated simultaneously in the timeliest manner practicable, allowing for recovery of
materials and data by standard archaeological procedures. For indigenous archaeological
sites, this data recovery involves the hand-excavated recovery and non-destructive
analysis of a small sample of the deposit. Historic resources shall also be sampled through
hand excavation, though architectural features may require careful mechanical exposure
and hand excavation.
Any previously undiscovered resources found during construction activities shall be
recorded on appropriate California Department of Parks and Recreation (DPR) forms
and evaluated for significance by a qualified Archaeologist. Significant cultural resources
consist of but are not limited to stone, bone, glass, ceramics, fossils, wood, or shell
artifacts, or features including hearths, structural remains, or historic dumpsites.”
CUL-2 The following language shall be incorporated into any plans associated with tree removal,
demolition, grading, and construction, “In the event that human remains (or remains that
may be human) are discovered at the project site, Public Resource Code Section 5097.98
must be followed. All grading or earthmoving activities shall immediately stop within 50
meters (165 feet) of the find. The Santa Clara County Coroner will be notified
immediately, and the coroner shall be permitted to examine the remains as required by
California Health and Safety Code Section 7050.5(b).
Section 7050.5 requires that excavation be stopped in the vicinity of discovered human
remains until the coroner can determine whether the remains are those of a Native
American. If human remains are determined as those of Native American origin, the
project proponent shall comply with the state relating to the disposition of Native
American burials that fall within the jurisdiction of the NAHC (Public Resource Code
[PRC] § 5097). The coroner shall contact the Native American Heritage Commission
(NAHC) to determine the most likely descendant(s) (MLD). The MLD shall complete his
or her inspection and make recommendations or preferences for treatment within 48
hours of being granted access to the site. The MLD will determine the most appropriate
means of treating the human remains and associated grave artifacts, and shall oversee the
disposition of the remains. In the event the NAHC is unable to identify an MLD or the
MLD fails to make a recommendation within 48 hours after being granted access to the
site, the landowner or his/her authorized representative shall rebury the Native American
human remains and associated grave goods with appropriate dignity within the project
area in a location not subject to further subsurface disturbance if: a) the Native American
Heritage Commission is unable to identify the MLD or the MLD failed to make a
recommendation within 48 hours after being allowed access to the site; b) the descendent
identified fails to make a recommendation; or c) the landowner or his authorized
representative rejects the recommendation of the descendent, and the mediation by the
Native American Heritage Commission fails to provide measures acceptable to the
landowner.”
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Geology and Soils
GEO-1 The applicant shall prepare a soils report addressing, but not limited to: foundation and
retaining wall design recommendations, and impacts associated with lateral spreading,
subsidence, or collapse. The soils report shall be submitted to the Town Building
Division for review and approval prior to issuance of a grading permit. All
recommendations outlined in the soils report shall be incorporated into the project
design.
GEO-2 The following measure shall be included in project plans, prior to issuance of a
demolition permit:
“If paleontological resources are uncovered during demolition, grading or other on-site
excavation activities, construction activities in the area shall be suspended. The
developer shall retain a qualified paleontologist to examine the site and identify
protective measures to be implemented to protect the paleontological resource. The
measures shall be subject to review and approval by the Community Development
Director.”
Greenhouse Gas Emissions
GHG-1 The project developer shall incorporate the following GHG emissions reduction
performance standard into the final project design:
No permanent natural gas infrastructure shall be permitted as part of the project
plans; no natural gas shall be made available through permanent natural gas
infrastructure. The project shall be all electric.
Final plans for the development shall be reviewed by the Town Community
Development Department prior to issuance of a building permit to ensure this
performance standard is incorporated into the project design. Verification of
development consistent with this performance standard shall be assured prior to
approval of occupancy permits.
Hazards and Hazardous Materials
HAZ-1 The project developer shall conduct soil vapor testing on the project site prior to issuance
of a grading permit. The results of the soil vapor testing shall be reviewed by the Town
Engineer and only with approval by the Town Engineer can any grading and earth-
moving construction activities take place.
If soil vapor testing comes back with concentration levels that exceed safety thresholds
for residential uses, the Town Engineer shall determine if Environmental Solutions
should provide recommendations for construction of the project. If soil vapor testing
comes back with concentration levels below safety thresholds, no further action is
necessary.
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Noise
N-1 The project developer shall ensure that no individual piece of construction equipment
produce a noise level exceeding 85 dBA at 25 feet. Prior to the start of ground disturbing
activities, the applicant shall demonstrate compliance with this requirement to the Town
of Los Gatos Building Department for review and verification.
The project developer shall also ensure that best management practices are
incorporated during construction activities. The following shall be placed on all
ground-disturbing project plans:
All construction equipment shall be properly maintained and muffled as to minimize
noise generation at the source.
Noise-producing equipment shall not be operating, running, or idling while not in
immediate use by a construction contractor.
All noise-producing construction equipment shall be located and operated, to the
extent possible, at the greatest possible distance from any noise-sensitive land uses.
Locate construction staging areas, to the extent possible, at the greatest possible
distances from any noise-sensitive land uses.
Signs shall be posted at the construction site and near adjacent sensitive receptors
displaying hours of construction activities and providing the contact phone number
of a designated noise disturbance coordinator.
N-2 The project developer shall install mechanical ventilation or air conditioning for all
residential units so that windows and doors can remain closed for sound insulation
purposes. Implementation of this measure is subject to review and approval by the Town
Building Department, prior to issuance of an occupancy permit.
Transportation
TRANS-1 Project improvements plans shall include the following, subject to review and
approval by the Town Engineer, prior to issuance of an occupancy permit:
a. Stripe a loading space along the project frontage on E. Main Street;
b. Apply 10 feet of No Parking (Red Zone) on both sides of the project driveway
on Church Street; and
c. Provide adequate landing space at the top and bottom of the garage ramps.