HomeMy WebLinkAboutResolution 2010-070 RESOLUTION NO 2010-070
A RESOLUTION OF THE CITY COUNCIL
OF THE CITY OF ATASCADERO, CALIFORNIA, CERTIFYING CITY
HALL REHABILITATION PROJECT
AMENDED MITIGATED NEGATIVE DECLARATION
PPN 2004-0141 AMENDMENT
(City of Atascadero)
WHEREAS, the City Council of the City of Atascadero, Atascadero, CA directed
staff to recirculate the December 2006 Mitigated Negative Declaration for the repair and
rehabilitation of City Hall, located at 6500 Palma Avenue, and,
WHEREAS, an Initial Study and Draft Amended Mitigated Negative Declaration
2006-0038 were prepared for the project and made available for public review in accordance
with the requirements of the California Environmental Quality Act (CEQA), and,
WHEREAS, the laws and regulations relating to the preparation and public notice of
environmental documents, as set forth in the State and local guidelines for implementation of
the California Environmental Quality Act (CEQA) have been adhered to, and,
WHEREAS, the City Council of the City of Atascadero held a public hearing on
October 12, 2010 following the close of the review period to consider the Initial Study and
Proposed Amended Mitigated Negative Declaration, and,
NOW, THEREFORE, the Atascadero City Council, at a public hearing held on
October 12, 2010, hereby resolves to certify an Amendment to Mitigated Negative
Declaration 2006-0038 based on the following Findings as shown on Exhibit A.
1 The Proposed Mitigated Negative Declaration has been completed in
compliance with CEQA, and,
2 The project does not have the potential to degrade the environment when
mitigation measures are incorporated into the project.
3 The project will not achieve short-term to the disadvantage of long-term
environmental goals.
4 The project does not have impacts which are individually limited, but
cumulatively considerable
5 The project will not cause substantial adverse effects on human beings either
directly or indirectly
irwr
RESO No. 2010-070 Exhibit A
CITY OF ATASCADERO
PROPOSED AMENDMENT TO MITIGATED
NEGATIVE DFCI ARATInA/ itgnnP_nnQP
bau i ti Uamino Real Atascadero, CA 93422 (805) 461-5035
Applicant:
City of Atascadero, City Hall, 6907 EI Camino Real, Atascadero, CA 93422
Project Title:
Atascadero City Hall Repair and Rehabilitation Project, Amendment to MND 2006-0038 and
Initial Study
Project
Atascadero City Hall, 6500 Palma Avenue, Atascadero, CA 93422, APN 029-345-001
Location:
Project
The project consists of a series of actions for the repair, maintenance, and rehabilitation of
Description:
Atascadero's City Hall a National Register Historic Building. The project will occur in three
phases. Funding for the project is derived from separate sources including FEMA, a
California Stat CCHE grant and local redevelopment funds.
The project will included the following specific items as delineated by a team of architectural
and engineering consultants retained by the City of Atascadero. The items fall within seven
major categories of work, as follows:
• Exterior cladding;
• Roofing, waterproofing, and skylights;
• Interior partitions, doors, and glazing;
• Floor and roof structure repairs;
• Plumbing system repairs;
• Heating, ventilation, and air conditioning repairs; and,
• Electrical lighting, power, and communication repairs.
• Structural retrofitting of building
An amendment to the original 2006 MND is proposed in order to remove four (4) mature
deodar cedar trees and one (1) mature Italian cypress are proposed for removal in order to
access the building and complete the repairs. The two (2) mature deodar cedar trees in the
front of the building on Palma Ave. will remain and be protected during construction.
Findings:
1. The project does not have the potential to degrade the environment.
2. The project will not achieve short-term to the disadvantage of long-term environmental goals.
3. The project does not have impacts which are individually limited but cumulatively considerable.
4. The project will not cause substantial adverse effects on human beings either directly or indirectly.
Determination:
Based on the above findings, and the information contained in the Initial study 2006-0038 (made a part
hereof by reference and on file in the Community Development Department), it has been determined that
the above project will not have an adverse impact on the environment when the following proposed
mitigation measures are incorporated into the project (see attachment).
Prepared By: Callie Taylor, Associate Planner
Date Posted: September 10, 2010
Public Review Ends: October 9, 2010
Attachments: Initial Study/Mitigated Negative Declaration 2006-0038 with Amendments
City of Atascadero
Resolution No. 2010-070
Page 2 of 2
aw
Exhibit A Draft Amended Mitigated Negative Declaration 2006-0038
Exhibit A is not attached due to the size of the Exhibit;
however, it is available for review in the Office of the City Clerk
On motion by Council Member Clay and seconded by Council Member O'Malley,
the foregoing Resolution is hereby adopted in its entirety on the following roll call vote
AYES Council Members Clay, Kelley, O'Malley and Mayor Fonzi
NOES Council Member 136raud
ABSENT None
ADOPTED- October 12, 2010
CITY OF ATASCADERO
By-
4""
*90 Roberta Fonzi, Mayor
ATTEST
Marcia MCClur-� Torgerson, C M.0 , City 04erk
APPROVED AS TO FORM.
l e-t�a
Brian A. Pierik, City Attorney
+err
.ECEIVED Exhibit A
JULIE L. RODEWALD
COUN I ERFA ASSCADERO
OCEQA REFERRAL
REC ST•440mMENTS
Community Development Department, 6907 EI Camino Real Atascadero, CA 93422 (805) 461-5035
NOTICE OF INTENTION BY -
TO ADOPT MITIGATED NEGATIVE DECLARATIWPUW
AND CITY COUNCIL PUBLIC HEARING
NOTICE IS HEREBY GIVEN that the City Council will be holding a public hearing to consider the following
nrniPct and envirnnmpntnl detarminatinn The ni ihlic is pnrni iranpri to attpnrl
Applicant:
City of Atascadero, City Hall, 6907 EI Camino Real, Atascadero, CA 93422
Project Title:
Atascadero City Hall Repair and Rehabilitation Project, Amendment to MND 2006-0038 and Initial
Study
Project Location:
Atascadero City Hall, 6500 Palma Avenue, Atascadero, CA 93422, APN 029-345-001
Project Description:
The project consists of a series of actions for the repair, maintenance, and rehabilitation of
Atascadero's City Hall a National Register Historic Building. The project will occur in three phases.
Funding for the project is derived from separate sources including FEMA, a California Stat CCHE
grant and local redevelopment funds.
The project will included the following specific items as delineated by a team of architectural and
engineering consultants retained by the City of Atascadero. The items fall within seven major
categories of work, as follows:
• Exterior cladding; To see the entire Environ
• Roofing, waterproofing, and skylights; Document, go to:
• Interior partitions, doors, and glazing;
www.atascadero.org/Corr
• Floor and roof structure repairs;
Development/Permit CE
• Plumbing system repairs;
• Heating, ventilation, and air conditioning repairs; and, Online/Environmental [
• Electrical lighting, power, and communication repairs.
• Structural retrofitting of building
An amendment to the original 2006 MND is proposed in order to remove four (4) mature deodar cedar
trees and one (1) mature Italian cypress are proposed for removal in order to access the building and
complete the repairs. The two (2) mature deodar cedar trees in the front of the building on Palma
Ave. will remain and be protected during construction.
Environmental Review
Begins: September 10, 2010
Dates:
Ends: October 9, 2010
Tentative Hearing
City Council: 10/12110
Date:
Hearing Location:
City Hall 6:00 p.m., 6907 EI Camino Real, Atascadero, CA 93422
Proposed
Based on the Amended initial study prepared for the project, an Amendment to the Mitigated Negative
Environmental
Declaration is proposed. The proposed Amendment to the Mitigated Negative Declaration is available for
Determination:
public review from 9/10/10 through 10/9/10 at 6907 EI Camino Real, Community Development
Department, from 8:30 a.m. to 5:00 p.m., Monday through Friday.
Any interested person may review the osed Mitigated Negative Declaration Amendment and project files. Questions should be
directed to Calli or, A&s� gner at 470-3448.
W 6fren Frace, Community Development Director Date
nental
munity
nter
Ocs.
ENVIRONMENTAL CHECKLIST FORM
Environmental Review 2006-0038
CITY OF ATASCADERO
INITIAL STUDY
Applicant:
City of Atascadero, City Hall, 6907 EI Camino Real, Atascadero, CA 93422
Project Title:
Atascadero City Hall Repair and Rehabilitation Project, Amendment to MND 2006-0038 and
Contact Person and Phone
Initial Study
Project
Atascadero City Hall, 6500 Palma Avenue, Atascadero, CA 93422, APN 029-345-001
Location:
Atascadero, CA 93422
Project
The project consists of a series of actions for the repair, maintenance, and rehabilitation of
Description:
Atascadero's City Hall a National Register Historic Building. The project will occur in three
Zoning:
phases. Funding for the project is derived from separate sources including FEMA, a
Surrounding Land Uses and
California Stat CCHE grant and local redevelopment funds.
Setting:
The project will included the following specific items as delineated by a team of architectural
and engineering consultants retained by the City of Atascadero. The items fall within seven
West: Downtown (Commercial)
major categories of work, as follows:
• Exterior cladding;
Other public agencies whose
• Roofing, waterproofing, and skylights;
approval is required (e.g.,
• Interior partitions, doors, and glazing;
permits, financing approval, or
participation agreement)
• Floor and roof structure repairs;
• Plumbing system repairs;
• Heating, ventilation, and air conditioning repairs; and,
• Electrical lighting, power, and communication repairs.
• Structural retrofitting of building
An amendment to the original 2006 MND is proposed in order to remove four (4) mature
deodar cedar trees and one (1) mature Italian cypress are proposed for removal in order to
access the building and complete the repairs. The two (2) mature deodar cedar trees in the
front of the building on Palma Ave. will remain and be protected during construction.
Lead Agency Name and
City of Atascadero
Address:
6907 EI Camino Real, Atascadero, CA 93422
Contact Person and Phone
Callie Taylor, Associate Planner
Number:
City of Atascadero, 6907 EI Camino Real
Atascadero, CA 93422
(805) 470-3448
General Plan Designation:
D — Downtown
Zoning:
DC — Downtown Commercial
Surrounding Land Uses and
North: Downtown (Commercial); Atascadero Junior High School
Setting:
South: Recreation (REC); Sunken Gardens
West: Downtown (Commercial)
East: Downtown (Commercial)
Other public agencies whose
San Luis Obispo Air Pollution Control District
approval is required (e.g.,
San Luis Obispo County Environmental Health Department
permits, financing approval, or
participation agreement)
Office of Historic Preservation FEMA
TABLE OF CONTENTS
CITY OFATASCADERO
INITIAL STUDY
Section Page
1.0 INTRODUCTION.............................................................................................................. 1-1
1.1
PURPOSE OF IS/MND........................................................................................
1-1
1.2
IS/MND FORMAT AND CONTENTS..................................................................
1-1
1.3
CEQA IS/MND REQUIREMENTS.......................................................................
1-2
1.4
LEAD AGENCY NAME AND ADDRESS.............................................................
1-2
1.5
CONTACT PERSON AND TELEPHONE NUMBER ...........................................
1-2
1.6
PROJECT SPONSOR'S NAME AND ADDRESS ...............................................
1-2
1.7
PROPERTY OWNERS........................................................................................
1-2
1.8
RESPONSIBLE AGENCIES................................................................................
1-2
2.0 PROJECT
DESCRIPTION..............................................................................................2-1
2.1
INTRODUCTION AND BACKGROUND..............................................................
2-1
2.2
PROJECT LOCATION.........................................................................................
2-3
2.3
SITE FEATURES.................................................................................................
2-3
2.4
NECESSARY PROJECT IMPROVEMENTS......................................................
2-3
2.5
PROJECT OBJECTIVES AND DESCRIPTION ..................................................
2-4
2.6
PROJECT FUNDING.........................................................................................
2-12
3.0 ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED ......................................... 3-1
3.1
AESTHETICS......................................................................................................
3-4
3.2
AGRICULTURAL RESOURCES.........................................................................
3-5
3.3
AIR QUALITY.......................................................................................................
3-6
3.4
BIOLOGICAL RESOURCES.............................................................................
3-14
3.5
CULTURAL RESOURCES................................................................................
3-16
3.6
GEOLOGY AND SOILS.....................................................................................
3-56
3.7
HAZARDS AND HAZARDOUS MATERIALS ....................................................
3-59
3.8
HYDROLOGY AND WATER QUALITY.............................................................
3-61
3.9
LAND USE AND PLANNING.............................................................................
3-64
3.10
MINERAL RESOURCES...................................................................................
3-65
3.11
NOISE................................................................................................................
3-65
3.12
POPULATION AND HOUSING.........................................................................
3-69
3.13
PUBLIC SERVICES...........................................................................................
3-70
3.14
RECREATION....................................................................................................3-71
3.15
TRANSPORTATION/TRAFFIC.........................................................................
3-73
3.16
UTILITIES/SERVICE SYSTEMS.......................................................................
3-76
3.17
MANDATORY FINDINGS OF SIGNIFICANCE .................................................
3-78
LIST OF TABLES
Table Title
3.3-1 Ambient Air Quality Standards ....................................................
3.3-2 Summary of Air Quality Standard Exceedances ........................
3.5-1 Repair and Rehabilitation Impact Evaluation ..............................
3.11-1 Definitions of Acoustical Terms ..................................................
3.15-1 Roadway Classifications.............................................................
CITY OF ATASCADERO
INITIAL STUDY
Figure Title
2-1 Site Vicinity Map...............................................................................................
2-2 Site Location Map............................................................................................
2-3 Site Plan...........................................................................................................
3.5-1 Existing Basement Level Floor Plan................................................................
3.5-2 Existing First Floor Plan...................................................................................
3.5-3 Existing Second Floor Plan..............................................................................
3.5-4 Existing Third Floor Plan..................................................................................
3.5-5 Existing Fourth Floor Plan................................................................................
3.5-6 Existing Upper Rotunda Mezzanine Plan ........................................................
3.5-7 Existing Roof Plan............................................................................................
3.5-8 Existing Section A............................................................................................
3.5-9 Existing Section B............................................................................................
APPENDICES
A. MITIGATION MONITORING AND REPORTING PROGRAM
B. HISTORICAL RESOURCES REPORT
C. SOILS ENGINEERING REPORT
Page
......... 2-5
......... 2-7
......... 2-9
....... 3-33
....... 3-35
....... 3-37
....... 3-39
....... 3-41
....... 3-43
....... 3-45
....... 3-47
....... 3-49
CITY OFATASCADERO
INITIAL STUDY
CHAPTER 1.0
INTRODUCTION
1.1 PURPOSE OF THE INITIAL STUDY/MITIGATED NEGATIVE DECLARATION
The City of Atascadero (City) Community Development Department, serving as the Lead Agency
under the California Environmental Quality Act (CEQA), has prepared this Initial Study/Mitigated
Negative Declaration (IS/MND) to assess the impacts that may result from the development of
the proposed project. The proposed project involves a series of actions to repair and rehabilitate
the Atascadero City Hall (City Hall), built in 1918, which was damaged by the 6.5 (Richter Scale)
San Simeon Earthquake, which occurred on December 22, 2003. The City Hall is on the
National Register of Historic Places (#77000336) and is a California Historical Landmark (#958).
It is a 58,834 square -foot building constructed of unreinforced masonry and concrete frame with
a masonry veneer. The damage caused to the historic building forced its closure and the
relocation of City staff to other buildings.
This IS/MND is intended to inform the public, decision makers and other responsible or
interested agencies and organizations of the potential environmental effects of the proposed
project. The environmental review process enables public agencies to evaluate a project in
terms of its environmental consequences and to consider and implement methods of eliminating
or reducing any potentially adverse impacts. This document is being prepared to review and
evaluate the significance of the project's impacts on historical resources and covers only the first
phase of the project.
1.2 IS/MND FORMAT AND CONTENTS
The IS/MND comprises the substantive portion of the environmental documentation for the
project prepared to comply with CEQA requirements. This IS/MND has been prepared in
conformance with the CEQA Guidelines for Implementation of the California Environmental
Quality Act, California Code of Regulations, Title 14 (hereafter "CEQA Guidelines"). The
IS/MND examines the following topic areas:
• Aesthetics
• Agricultural Resources
• Air Quality
• Biological Resources
• Cultural Resources
• Geology and Soils
• Hazards and Hazardous
Materials
• Hydrology/Water Quality
1-1
• Land Use/Planning
• Mineral Resources
• Noise
• Population and Housing
• Public Services
• Recreation
• Transportation/Traffic
• Utilities/Services Systems
1.3 CEQA IS/MND REQUIREMENTS
CITY OF ATASCADERO
INITIAL STUDY
An IS/MND must be prepared in conformance with the CEQA of 1970, as amended. Public
Resources Code Section 21064.5 and CEQA Guidelines Section 15070 state that an IS/MND
may be prepared if the Initial Study identifies a potentially significant effect for which the project
proponent has made, or agrees to make, project revisions that clearly mitigate the effects.
Additionally, an IS/MND may not be used if any substantial evidence indicates that the revised
project with mitigation may still have a significant effect on the environment.
1.4 LEAD AGENCY NAME AND ADDRESS
CEQA applies to discretionary government actions that are defined as a project and have the
potential to result in either a direct or indirect physical change in the environment. An activity is
considered a project if it requires issuance of a lease, permit, license, certificate, or other
entitlement by a public agency. The CEQA Lead Agency is the California government agency
that has the principal responsibility of approving a project and preparing the appropriate CEQA
documentation. CEQA applies to all California government agencies at all levels, including local
agencies, regional agencies, and state agencies, boards, commissions, and special districts.
The City is designated as the CEQA lead agency for approval of this project by virtue of its
discretionary authority as a municipality.
1.5 CONTACT PERSON AND TELEPHONE NUMBER
Callie Taylor, Associate Planner
City of Atascadero
Community Development Department
6907 EI Camino Real
Atascadero, CA 93422
Telephone (805) 461-5000, ext. 3448
1.6 PROJECT SPONSOR'S NAME AND ADDRESS
See above
1.7 PROPERTY OWNERS
See above
1.8 RESPONSIBLE AGENCIES
A responsible agency is an agency other than the lead agency that has a legal responsibility for
also carrying out or approving a project. The responsible agency must actively participate in the
lead agency's CEQA process by reviewing the document and using it for the approval of the
project. The responsible agency may also use this document to achieve CEQA compliance
when issuing permits or approvals required authorizing the project. Responsible agencies
pertaining to this project include:
• San Luis Obispo Air Pollution Control District. California Air Resource Board has
enacted an Asbestos Airborne Toxic Control Measure for Construction, Grading,
Quarrying and Surface Mining Operations. The San Luis Air Pollution Control District
(APCD) would require submittal of an evaluation prior to construction which includes
1-2
I Q6 A
CITY OF ATASCADERO
INITIAL STUDY
a determination as to whether building materials at the project site may contain
asbestos. If asbestos is present, then the APCD may require preparation of an
Asbestos Health and Safety Program and dust mitigation measures under guidance
of the National Emission Standards for Hazardous Air Pollutants (NESHAP).
• County of San Luis Obispo Environmental Health Department. The San Luis Obispo
Environmental Health Department (SLOEHD) would be responsible for dealing with
lead issues in the event lead is found. Due to the age of the building, it is very likely
that lead is present. Therefore, SLOEHD would act as an implementing authority for
preparation of a Lead Work Plan.
1-3
CITY OF ATASCADERO
THIS PAGE LEFT INTENTIONALLY BLANK
1-4
INITIAL STUDY
CHAPTER 2.0
PROJECT DESCRIPTION
2.1 INTRODUCTION AND BACKGROUND
CITY OF ATASCADERO
INITIAL STUDY
The City has proposed to undertake actions to repair and rehabilitate the City Hall, which was
damaged by the 6.5 San Simeon Earthquake of December 22, 2003. The project, known as the
City Hall Repair and Rehabilitation Project, would include seven categories of work related to
repair, rehabilitation and maintenance of the building as specified by a team of architectural and
engineering consultants retained by the City. With implementation of the proposed project, the
City aims to ensure that the project conforms to provisions of CEQA Guidelines pertaining to
preservation and restoration of registered historic buildings. This document is being prepared in
order to review and evaluate the significance of the project's impacts on historical resources and
other areas of potential environmental significance.
2.1.1 Building History
The City Hall was originally designed and constructed to be the centerpiece of the Atascadero
Colony, a utopian planned community by Edward Gardner Lewis. With the desire to have an
administration building to attract attention to the community, Lewis commissioned Bliss and
Faville, a prominent San Francisco architectural firm to design the building. After completion of
the design process, construction began in 1914 and was completed in 1918 by the F.O.
Engstrom Company of Los Angeles utilizing local resources, including bricks made from local
clay.
Designed with a Greek cross plan, the building houses two separate and distinct rotunda spaces
on the first and fourth floors in the center of the building, with offices ringing the perimeter. The
40 -foot tall rotunda space on the first floor was designed to be a museum to showcase
agricultural and mineral products. It is far more ornate than the fourth floor rotunda due to the
decorative plaster, coffered dome, clerestory windows and elaborate chandelier. The 44 -foot tall
rotunda on the fourth floor was originally planned to be the community library and, up until the
earthquake, was used as city council chambers. This rotunda is more subdued than the first
floor space due to the original space plan for the building. Ornate plaster column capitals are
the most decorative elements and the original skylight at the top of the dome has long been
eliminated on the exterior of the building and re -roofed with a metal cap. The remainder of the
building is filled with offices.
The building functioned as the headquarters of the Colony Holding Corporation until the Colony's
bankruptcy in the mid 1920's. After that, the building housed many functions including real
estate offices, a bank, and a number of different schools. The County of San Luis Obispo
acquired the building in 1950 as a Veteran's Memorial and leased out portions to a local school.
In 1952 the County moved its offices into the building and when the City incorporated in 1979,
the building was returned to the City to function as an administration building. The building was
2-1
CITY OFATASCADERO
INITIAL STUDY
listed on the National Register of Historic Places (#77000336) in 1977 and was made a
California Registered Historical Landmark (#958) in 1984.
2.1.2 Structural Damage
As a result of the San Simeon Earthquake,
extensive damage occurred to the City Hall,
including approximately seven inches of
differential foundation settlement and slab -on -
grad buckling. The reinforced concrete floors
and stairs also sustained spalling damage (i.e.,
cracking and chipping). The unreinforced
masonry walls were damaged by major cracking,
spalling, permanent distortion, and localized
collapse.
Evaluation of the structural earthquake damage
was performed using Federal Emergency
Management Agency (FEMA) guidelines, finite
element computer techniques and ground motion
data from the 2003 San Simeon earthquake.
Based on the structural evaluation data, the
structural earthquake safety of the City Hall
building has been significantly reduced.
Extensive structural repairs are required to repair
and rehabilitate the pre -earthquake safety levels of the City Hall building.
2.1.3 Architectural and
Materials Damage
Architectural and
materials damage also
occurred. Flooring,
including concrete and
vinyl, was damaged.
Interior plaster damage
and cracking occurred to
interior walls. Ceiling
damage included cracking
and plaster delamination,
as well as water damage
as a result of rain entering
through punctures in the
ceiling. Doors sustained
damage via jamming
caused by differential
2-2
CITY OF ATASCADERO
INITIAL STUDY
settlement. Damage to windows includes shattered glass and misaligned frames and sashes.
Other materials damage includes cracked plaster at entry porticos. Roofing on the City Hall was
also significantly damaged, creating gouges that were caused by falling masonry debris.
Skylights were cracked or shattered and will also require replacement. These damaged
elements and a large number of other miscellaneous repairs are required.
2.2 PROJECT LOCATION
The City Hall project site is located at 6500 Palma Avenue in downtown Atascadero. The parcel
consists of approximately one acre bordered by Sunken Gardens to the south, Atascadero
Junior High school to the north and downtown commercial uses to the west and east. See
Figures 2-1 and 2-2 for site vicinity and site location maps. Figure 2.3 provides a site plan view
of the project site.
2.3 SITE FEATURES
The site is currently developed with the City Hall, which was built in 1918 and damaged by the
6.5 (Richter scale) San Simeon Earthquake of December 22, 2003. The City Hall is on the
National Register of Historic Places (#77000336) and is a California Historical Landmark (#958).
It is a 58,834 square -foot building constructed of unreinforced masonry and concrete frame with
a masonry veneer. The damage caused to the historic building forced its closure and the
relocation of City staff to other buildings.
The existing topography is flat and the site contains mature non-native evergreens trees,
including six deodar cedar trees and one Italian cypress tree. Based on historic photographic
evidence and the size of the trees, staff has concluded that all of these trees were planted within
the first ten years of the completion of City Hall. The arborist estimates that these trees are
about 90 years old. No native vegetation or sensitive habitats exist on the site. The site was
originally fully landscaped with lawns, shrubbery, trees, and fountains. Most of the landscape
was either previously removed or has not been maintained since the earthquake. Several Italian
cypress trees were originally installed in a formal landscape around the building. Only one
Italian cypress tree remains.
2.4 NECESSARY PROJECT IMPROVEMENTS
The proposed project consists of a series of actions for the repair and rehabilitation of the City
Hall. The project will be funded by separate and different sources for each phase. The first
phase of the project would obtain funding from a State grant (see Section 2.6). The State grant
covers work only associated with the repair, maintenance and rehabilitation of the historical and
cultural aspects (i.e. architectural veneers, floor and roof structures) of the damaged City Hall.
Additional funding sources will cover other building elements, such as fire protection systems
and Building Code requirements that are not associated with the historical restoration work as
PAR]
��sc+oetib.
CITY OF ATASCADERO
INITIAL STUDY
funded by the State grant. FEMA funding will be used to repair structural earthquake damage to
achieve seismic safety standards.
Structural repair, as outlined in the City of Atascadero City Hall Damage Assessment &
Rehabilitation Plan (Pfeiffer Partners, 2005), is designed to repair and rehabilitate the pre -
earthquake performance levels of the building and includes the following:
• Epoxy injection of earthquake cracks in damaged reinforced concrete floors and
stairs; and,
• Repair of extensive earthquake damage to unreinforced masonry walls using a
variety of repair techniques as appropriate based on the damage conditions,
including grout injection, reinforced concrete overlays, carbon fiber overlays, steel
replacement bracing, wall anchorage, and localized removal and reconstruction.
In addition to the structural repairs, additional seismic strengthening measures are
recommended to mitigate future earthquake damage including:
• Additional reinforced concrete overlays on unreinforced masonry walls;
• Connection strengthening of the timber dome framing and ring beam; and,
• Anchorage of brick veneer.
2.5 PROJECT OBJECTIVES AND DESCRIPTION
The purpose of the project is to allow repair and rehabilitation of the usefulness of the City Hall
and to address and satisfy the statutory provisions related to structures of historical and
archaeological significance (Section 15064.5, Article 5, CEQA Guidelines). There are 55
specific items that fall within seven major categories which are associated with the repair,
maintenance and rehabilitation of the historical and cultural aspects of the project:
• Exterior cladding;
• Roofing, waterproofing, and skylights;
• Interior partitions, doors, and glazing;
• Floor and roof structure repairs;
• Plumbing system repairs;
• Heating, ventilation, and air conditioning repairs; and,
• Electrical lighting, power, and communication repairs.
2-4
CITY OF ATASCADERO
INITIAL STUDY
Work items within the first three categories noted are classified as restoration activity, whereas
work items within the last four categories are classified as deferred maintenance activity. With
respect to this project, restoration activity consists of those actions or treatments intended to
restore character -defining elements of the building to their original 1918 condition and
appearance, whereas deferred maintenance activity consists of repair work intended to extend
and enhance the life of City Hall (i.e., improve the infrastructure of the building to a condition
superior to that which existed prior to the San Simeon earthquake.)
In the initial planning of the City Hall restoration project, all the seven remaining trees (including
the six deodar cedars and the one Italian cypress tree) were to be protected and retained on
site. A project arborist completed a tree protection plan which identified areas near the trees
which needed to be protected and were not to be impacted during construction. In order to save
the trees, most of the site needs to be fenced off or covered with layers of matting to protect the
critical root zone of the large trees. However, the contractors have found that demolition and
construction of the proposed project can not be completed without access to these areas of the
site. An amendment to the original 2006 MND is proposed in order to remove four (4) deodar
cedar trees and one (1) Italian cypress in order to access the building and complete the repairs.
The two (2) deodar cedar trees in the front of the building on Palma Avenue will be protected
during construction in an effort to save the most visible trees on the site. New landscape will be
installed after completion of the construction in order to mitigate the visual impact of these non-
native tree removals.
2-5
November 2006
Project No.0602-2391
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19 EEWRO NG ENYENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 2-1
THIS PAGE LEFT INTENTIONALLY BLANK
2-7
CITY OF ATASCADERO
INITIAL STUDY
November 2006
Project No. 0602-2391
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RB. GEOLOGISTS i
® ENVIRONMENTAL SMKT1STS
Atascadero City Hall Repair Project IS/MND FIGURE 2-2
THIS PAGE LEFT INTENTIONALLY BLANK
2-9
CITY OF ATASCADERO
INITIAL STUDY
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2-11
CITY OF ATASCADERO
INITIAL STUDY
Exterior Cladding
CITY OF ATASCADERO
INITIAL STUDY
• Exterior Finishes Repairs: pin loose decorative terra cotta, repair decorative terra
cotta glaze and bisque spalls, rebuild displaced masonry, patch spalled brick, remove
and replace damaged parge coating, inject epoxy into cracked brick and terra cotta,
repoint open mortar joints in brick and terra cotta, replaced 12 missing stone pieces,
prep and paint exposed steel lintels, remove mortar droppings on surface of terra
cotta from previous repair work, and repair cast stone column bases;
• Exterior Doors & Frames: replace non -historic aluminum entrance doors with new
Hope's metal doors and transom to match historic pattern, reconfigure existing
exterior masonry to match opposite corner due to door replacement, and prepare and
paint existing door lintels;
• Exterior Soffits: prepare and paint peeling roof eaves, and prepare and paint existing
plaster ceilings at entries;
• Exterior Balustrades, Parapets, and Roof Screens: install epoxy pin anchors in
cracked terra cotta balustrades, repair terra cotta glaze spalls, replace terra cotta
blocks that have significant spalls, inject epoxy into terra cotta and brick cracks,
repair the existing steel balustrade bracing, install new parge coating at top surface of
brick parapet, repoint terra cotta joints at balustrade, clean organic growth on
balustrade, and remove CMU infill in balustrade and replace with new terra cotta
balusters to match historic pattern; and,
• Miscellaneous Exterior Work: prep and paint all cast stone, clean off all
efflorescence, clean off all water stains, and clean off all organic growth.
Roofing, Waterproofing, & Skylights
• Repair and rehabilitation would include: install below grade membrane waterproofing
to foundations walls, clean fascia flashing at roofing, fasten uncompleted roof drains,
add bird stop, remove and replace all painted glass in upper rotunda ceiling with new
translucent tempered glass to match historic pattern, restore skylights above two
main staircases, and miscellaneous caulking and sealing.
Interior Partitions, Doors & Glazing
• Partitions: recreate overlooks into first floor rotunda, construct light boxes at previous
clerestory locations in lower rotunda, and construct light boxes at previous clerestory
in upper rotunda; and,
• Balustrades and Rails: reopen overlooks into first floor rotunda including demo,
rebuild railings, rebuild low wall and install glass, and remove existing railing and
replace with new to match historic pattern.
2-12
-) CITY OF ATASCADERO
° l INITIAL STUDY
Floor & Roof Structure Repairs
• Repair spalled and cracked concrete slabs and beams at the suspended floors;
• Remove and replace roof framing;
• Replace plywood sheathing at roof; and,
Miscellaneous metal and blocking repairs.
Plumbing System Repairs
• Sanitary waste, vent, and service pipework repairs;
• Kitchen system repairs including equipment connection, grease waste fittings and
grease interceptor; and
• Upgrade natural gas service including shut off valves, pipework, and fittings.
Heating, Ventilation, & Air Conditioning (HVAC) Repairs
• Replace HVAC air distribution systems, zoning & controls.
Electrical Lighting, Power & Communication Repairs
• Upgrade main power and distribution breakers to (e) switchboard;
• Upgrade machine and equipment power connections, switches, conduit, and cable;
• Upgrade user convenience power receptacles, including conduit and cable, spot
upgrades;
• Install new lighting fixtures at upper and lower rotunda light boxes;
• Upgrade lighting control panels; and,
• Upgrade telephone/data outlets, including conduit and cable, spot upgrades.
2.6 PROJECT FUNDING
In September of 2002, Governor Davis signed the California Cultural and Historical Endowment
Act, which established the California Cultural and Historical Endowment (Endowment) in the
California State Library (AB 716). The Act requires the Endowment to use Proposition 40 fund
to make grants and loans to public agencies and nonprofit organizations for California's cultural
and historic resources. Proposition 40 — the California Clean Water, Clean Air, Safe
Neighborhood Parks, and Coastal Protection Act), approved in 2002, included $267 million for
historic and cultural resource preservation. Due to its historical significance, the City Hall
2-13
CITY OF ATASCADERO
INITIAL STUDY
demonstrates "culturally significant aspects of life during various periods of California history,
including architecture..."
The establishment of the Endowment is intended to raise the profile and. scope of California's
historic and cultural preservation program. In 2003, the state budget authorized the Endowment
to spend $128 million of Proposition 40's funds to carry out its programs. The City Hall would
use Proposition 40 funds to support the repair and rehabilitation of the City Hall.
2-14
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2-15
CITY OF ATASCADERO
INITIAL STUDY
CITY OF ATASCADERO
INITIAL STUDY
CHAPTER 3.0
ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED
The environmental factors checked below would be potentially affected by this project, involving
at least one impact that is a "Potentially Significant Impact" as indicated by the checklist on the
following pages.
®
Aesthetics
❑
Agriculture Resources
®
Air Quality
❑
Biological Resources
®
Cultural Resources
®
Geology /Soils
®
Hazards & Hazardous
❑
Hydrology / Water
❑
Land Use / Planning
Materials
Quality
❑
Mineral Resources
®
Noise
❑
Population / Housing
❑
Public Services
❑
Recreation
®
Transportation/Traffic
❑
Utilities / Service
®
Mandatory Findings of Significance
Systems
On the basis of this initial evaluation:
❑ I find that the proposed project COULD NOT have a significant effect on the environment,
and a NEGATIVE DECLARATION will be prepared.
® I find that although the proposed project could have a significant effect on the environment,
there will not be a significant effect in this case because the mitigation measures described
on an attached sheet have been added to the project. A MITIGATED NEGATIVE
DECLARATION will be prepared.
❑ I find that the proposed project MAY have a significant effect on the environment, and an
ENVIRONMENTAL IMPACT REPORT is required.
❑ I find that the proposed project MAY have a "potentially significant effect" or "potentially
significant unless mitigated" impact on the environment, but at least one effect 1) has been
adequately analyzed in an earlier document pursuant to applicable legal standards, and
2) has been addressed by mitigation measures based on the earlier analysis as described
on attached sheets. An ENVIRONMENTAL IMPACT REPORT is required, but it must
analyze only the effects that remain to be addressed.
3-1
CITY OF ATASCADERO
INITIAL STUDY
❑ I find that although the proposed project could have a significant effect on the environment,
there WILL NOT be a significant effect in this case because all potentially significant effects
(a) have been analyzed adequately in an earlier EIR or NEGATIVE DECLARATION pursuant
to applicable standards and (b) have been avoided or mitigated pursuant to that earlier EIR
or NEGATIVE DECLARATION, including revisions or mitigation measures that are imposed
upon the proposed project.
Callie Taylor
Associate Planner
3-2
CITY OF ATASCADERO
INITIAL STUDY
EVALUATION OF ENVIRONMENTAL IMPACTS:
1) A brief explanation is required for all answers except "No Impact" answers that are
adequately supported by the information sources a Lead Agency cites following each
question. A "No Impact" answer is adequately supported if the referenced information
sources show that the impact simply does not apply to projects like the one involved (e.g. the
project falls outside a fault rupture zone). A "No Impact" answer should be explained where
it is based on project -specific factors as well as general standards (e.g. the project will not
expose sensitive receptors to pollutants, based on a project -specific screening analysis).
2) All answers must take in account of the whole action involved, including off-site as well as
on-site, cumulative as well as project -level, indirect as well as direct, and construction as well
as operational impacts.
3) "Potentially Significant Impact" is appropriate if there is substantial evidence that an effect is
significant. If there are one or more "Potentially Significant Impact" entries when the
determination is made, an EIR is required.
4) "Potentially Significant Unless Mitigation Incorporated" applies where the incorporation of
mitigation measures has reduced an effect from "Potentially Significant Impact" to a "Less
than Significant Impact." The Lead Agency must describe the mitigation measures, and
briefly explain how they reduce the effect to a less than significant level (mitigation measures
from Section XVII, "Earlier Analyses," may be cross-referenced).
5) Earlier analyses may be used where, pursuant to the tiering, program EIR, or other CEQA
process, an effect has been adequately analyzed in an earlier EIR or negative declaration.
Section 15063(c)(3)(D). Earlier analyses are discussed in Section XVII at the end of the
checklist.
6) Lead Agencies are encouraged to incorporate into the checklist references information
sources for potential impacts (e.g. general plans, zoning ordinances). Reference to a
previously prepared or outside document should, where appropriate, include a reference to
the page or pages where the statement is substantiated. A source list should be attached.
Other sources used or individuals contacted should be cited in the discussion.
3-3
(
i
CITY OF ATASCADERO
INITIAL STUDY
Less Than
Potentially
Significant
Less Than
No
Significant
with
Significant
Impact
Initial Study 2006-0038
Impact
Mitigation
Impact
City Hall Repair and Rehabilitation Project
Incorporation
13.1. AESTHETICS -- Would the project:
a) Have a substantial adverse effect on a scenic vista?
®
❑
b) Substantially damage scenic resources, including, but not
limited to, trees, rock outcroppings, and historic buildings
within a state scenic highway?
c) Substantially degrade the existing visual character or
El
quality of the site and its surroundings?
d) Create a new source of substantial light or glare that
would adversely affect day or nighttime views in the area?
SOURCES: Site Visit.
Setting
The City is located near the southern end of the Salinas Valley adjacent to the Salinas River.
The core of the City lies just west of the River along EI Camino Real, which supports the majority
of the City's commerce and business activities. Further west, residential neighborhoods extend
in ever -decreasing densities into the foothills of the coastal Santa Lucia Mountains. Seasonal
streams that meander through the foothills and neighborhoods to the valley floor cut the slopes
of the Santa Lucia's. The wooded foothills provide the visual backdrop and setting for the City.
Oak trees are an important visual characteristic of the City, in forests, smaller groves, and as
landmark individuals.
The site is currently the location of quake -damaged City Hall, which was built in 1918. , and is
contains shrubbery, and mature, non-native trees. The City Hall is located in downtown
Atascadero in the commercial business district. Adjacent buildings include small commercial
businesses to the west and east, and the Atascadero Junior High School to the north. Visual
resources of note adjacent to the City Hall include Sunken Gardens and the large, mature
Deodor Cedar (Cedrus deodora) trees located on the park and City Hall grounds. Scenic vistas
are generally obscured by these large trees, and surrounding development.
Answers to Checklist Questions
Questions A:
The site does not provide a substantial scenic vista or views of rock outcroppings; however,
construction activities would temporarily alter the visual aesthetics of the City Hall as viewed
from the immediate surroundings, such as Sunken Gardens.
3-4
Questions B and C:
CITY OFATASCADERO
INITIAL STUDY
There would not be substantial amounts of exposed soils during construction. However, minor
amounts of construction equipment for repairs and hauling of construction materials would be
present near the City Hall during the course of construction. This would represent a short-term
visual change in the aesthetic character of the City Hall. These impacts would be temporary in
nature. Ultimately, repair and rehabilitation of the City Hall would have a beneficial effect
through restoration of its currently damaged exterior; therefore, impacts would be less than
significant.
The two most visually prominent deodar cedar trees face Palma Avenue and the Sunken
Gardens. These trees will the preserved and protected during construction.
Four of the mature deodar cedar trees which surround City Hall are proposed to be removed in
order to complete the construction. These trees are interfering with the construction access to
the building and must be removed. The two large deodar cedars in the front of City Hall next to
Palma Ave. are proposed to remain on site in order to preserve this view of City Hall from the
Sunken Gardens. These two front trees are the most highly visible trees on site. By removing
the other trees, the two cedars along Palma can be properly protected during construction and
equipment can be redirected away from the critical root zone of these two trees during
construction in an effort to save the two trees.
All tree removals shall be mitigated by replanting on site. Most of the existing trees on site are
nearing the end of their life span and in declining condition, and are not expected to survive
through the construction impacts. By replacing the removed trees with new, healthy landscape,
the visual aesthetics of the site will be improved and can be maintained for the future.
Questions D:
No new sources of light would be introduced to the project area as a result of the City Hall
Repair and Rehabilitation Project. No nighttime construction is proposed; therefore, impacts
would be less than significant.
Mitigation
Mitigation Measure A-1. The site shall be relandscaped upon completion of construction in order
to mitigate the visual impacts of the tree removals A landscape plan prepared by a qualified
landscape professional shall be submitted with building permits for approval The Atascadero
Historical society shall be consulted when choosing the plant material for the new landscape
Finding
With the incorporation of mitigation, the proposed project would result in less than significant
impacts to aesthetics.
3-5
Initial Study 2006-0038
City Hall Repair and Rehabilitation Project
3.2. AGRICULTURAL RESOURCES: In determining
whether impacts to agricultural resources are significant
environmental effects, lead agencies may refer to the
California Agricultural Land Evaluation and Site Assessment
Model (1997) prepared by the California Dept. of
Conservation as an optional model to use in assessing
impacts on agriculture and farmland. Would the project:
CITY OF ATASCADERO
INITIAL STUDY
Less Than
Potentially Significant Less Than No
Significant with Significant Impact
Impact Mitigation Impact
Incorporation
a) Convert Prime Farmland, Unique Farmland, or Farmland
El
❑
M
of Statewide Importance (Farmland), as shown on the maps
prepared pursuant to the Farmland Mapping and Monitoring
Program of the California Resources Agency, to non-
agricultural use?
b) Conflict with existing zoning for agricultural use, or a
Williamson Act contract?
c) Involve other changes in the existing environment which,
due to their location or nature, could result in conversion of
Farmland, to non-agricultural use?
SOURCES: Site Visit
Setting
There are currently about 44 acres of zoned agricultural lands within the City. There are over
100 acres of prime farmland along the Salinas River, Farmland of Local Potential along Graves
Creek, and a large amount of acreage that is classified as grazing land.
Answers to Checklist Questions
Questions A -C:
As the project site has been fully developed, it is not considered prime farmland. Because the
property is developed and is located in an urbanized setting, there would be no impacts to
agricultural resources.
Finding
There would be no impact to agricultural resources.
3-6
Setting
This section addresses the air emissions of the proposed project and the potential impacts to air
quality. Impacts to air quality associated with the project were assessed based on a comparison
to the significance thresholds developed by the San Luis Obispo County Air Pollution Control
District (APCD).
Climate and Meteorology
The project site is located in the City of Atascadero, within the upper Salinas River Valley. This
area supports about 25 percent of the County's population, and has historically experienced the
highest ozone and particulate levels in the County. Transport of ozone precursors (oxides of
nitrogen and hydrocarbons) from coastal regions and the San Joaquin Valley may contribute to
the high pollutant levels.
Although the project area is located about 15 miles from the coast, the Pacific Ocean plays a key
role in moderating temperatures and affecting weather patterns. Summers are warm, but an
early morning marine layer may occur. Winters are usually cool and wet with the rainy season
extending from late November to early April.
3-7
CITY OF ATASCADERO
INITIAL STUDY
Less Than
Potentially
Significant
Less Than
No
Initial Study 2006-0038
Significant
Impact
with
Mitigation
Significant
Impact
Impact
p
City Hall Repair and Rehabilitation Project
Incorporation
3.3. AIR QUALITY -- The significance criteria established by
the Air Quality Control District in its CEQA Guidelines may
be relied upon to make the following determinations. Would
the project:
a) Conflict with or obstruct implementation of the applicable
air quality plan?
b) Violate any air quality standard or contribute substantially
to an existing or projected air quality violation?
c) Result in a cumulatively considerable net increase of any
criteria pollutant for which the project region is non -
attainment under an applicable federal or state ambient air
quality standard (including releasing emissions that exceed
quantitative thresholds for ozone precursors)?
d) Expose sensitive receptors to substantial pollutant
concentrations?
e) Create objectionable odors affecting a substantial number
of people?
SOURCES: Air Pollution Control District (APCD) CEQA Air Quality Handbook, California Air Resources Board, West
Front Villages IS/MND (City of Atascadero)
Setting
This section addresses the air emissions of the proposed project and the potential impacts to air
quality. Impacts to air quality associated with the project were assessed based on a comparison
to the significance thresholds developed by the San Luis Obispo County Air Pollution Control
District (APCD).
Climate and Meteorology
The project site is located in the City of Atascadero, within the upper Salinas River Valley. This
area supports about 25 percent of the County's population, and has historically experienced the
highest ozone and particulate levels in the County. Transport of ozone precursors (oxides of
nitrogen and hydrocarbons) from coastal regions and the San Joaquin Valley may contribute to
the high pollutant levels.
Although the project area is located about 15 miles from the coast, the Pacific Ocean plays a key
role in moderating temperatures and affecting weather patterns. Summers are warm, but an
early morning marine layer may occur. Winters are usually cool and wet with the rainy season
extending from late November to early April.
3-7
CITY OF ATASCADERO
INITIAL STUDY
The nearest climatic data station to the project site is in the City of Atascadero. The coldest
month is December, with an average minimum temperature of 31 degrees Fahrenheit. The
warmest month is August, with an average maximum temperature of 92 degrees Fahrenheit.
The average annual rainfall is 14.71 inches, with 91 percent falling from November through April.
Airflow plays an important role in the movement and dispersion of air pollutants in the San Luis
Obispo region. The speed and direction of local winds are controlled by 1) the location and
strength of the Pacific High pressure system and other global patterns, 2) topographical factors,
and 3) circulation patterns resulting from temperature differences between the land and sea.
During the spring and summer, when the Pacific High attains its greatest strength, onshore
winds from the northwest generally prevail during the day. As evening approaches, onshore
winds die down, and the wind direction reverses with weak winds flowing down the coastal
mountains and valleys to form light easterly breezes.
In the fall, onshore surface winds decline and the marine layer grows shallow, allowing an
occasional reversal to a weak offshore flow. This, along with the diurnal alteration of land -sea
breeze circulation, can sometimes produce a "sloshing" effect. Under such conditions,
pollutants may accumulate over the Pacific Ocean and subsequently be carried back onshore
with the return of sea breezes.
In the atmosphere, air temperatures normally decrease as altitude increases. At varying
distances above the earth's surface; however, a reversal of this temperature gradient can occur.
Such a condition, which is called an inversion, is simply a warm layer of air over a layer of cooler
air. Inversions can have the effect of limiting the vertical dispersion of air pollutants, trapping
them near the earth's surface. Several types of inversions are common to the San Luis Obispo
area. Weak surface inversions are caused by radiational cooling of air in contact with the cold
surface of the earth at night. In valleys and low-lying areas, this condition is intensified by the
addition of cold air flowing down from hills and pooling on valley floors. Surface inversions are
common throughout the County during winter months, particularly on cold mornings. As the
morning sun warms the earth and air near the ground, the inversion lifts, gradually dissipating
throughout the day.
During the summer, subsidence inversions can occur when the summertime presence of the
Pacific high-pressure cell can cause the air mass aloft to sink. As the air descends,
compressional heating warms the air to a higher temperature than the air below. This highly
stable atmospheric conditioning can act as a nearly impenetrable lid to the vertical mixing of
pollutants. Subsidence inversions can persist for one or more days, causing air stagnation and
the buildup of pollutants.
Air Pollution Control
Air pollution control is administered on three governmental levels in the project area. The United
States Environmental Protection Agency (EPA) has jurisdiction under the Federal Clean Air Act
to develop Federal air quality standards and to require individual states to prepare State
Implementation Plans (SIPs) to attain these standards.
3-8
CITY OF ATASCADERO
INITIAL STUDY
The California Environmental Protection Agency Air Resources Board (ARB) has jurisdiction
under the California Health and Safety Code and the California Clean Air Act to develop
California air quality standards, to require regional plans to attain these standards, and to
coordinate the preparation by local air districts of plans required by both the Federal and State
Clean Air Acts. ARB is also responsible for the development of state emission standards for
mobile and stationary emission sources.
The APCD shares responsibility with the ARB for ensuring that all State and Federal ambient air
quality standards are attained within the County. The APCD has jurisdiction under the California
Health and Safety Code to develop emission standards for the County, issue air pollution
permits, and require emission controls for stationary sources in the County. Additionally, the
APCD is also responsible for the attainment of State and Federal air quality standards in the
County.
Air Quality Standards
Air quality standards are specific concentrations of pollutants that are used as thresholds to
protect public health and the public welfare. The U.S. Environmental Protection Agency (EPA)
has developed two sets of standards; one to provide an adequate margin of safety to protect
human health and the second to protect the public welfare from any known or anticipated
adverse effects. At this time, sulfur dioxide is the only pollutant for which the two standards
differ.
ARB has developed air quality standards for California, which are generally lower in
concentration than the Federal standards. California standards exist for ozone, carbon
monoxide, nitrogen dioxide, PM,o, visibility, sulfates, lead, hydrogen sulfide and vinyl chloride.
In July 1997, the EPA finalized new health -based ozone and particulate matter (PM) standards.
However, due to several lawsuits the standards were not fully implemented until February 2001.
The new Federal ozone standard is based on a longer averaging period (8 -hour vs. 1 -hour),
recognizing that prolonged exposure is more damaging. The new Federal PM standard is based
on finer particles (2.5 microns and smaller vs. 10 microns and smaller), recognizing that finer
particles may have a higher residence time in the lungs and cause greater respiratory illness. In
2002, the ARB lowered the annual standards for PM,o and PM2.5 in response to the Children's
Environmental Health Protection Act. Table 3.3-1 lists the applicable State and Federal air
quality standards.
3-9
I
Table 3.3-1. Ambient Air Quality Standards
CITY OF ATASCADERO
INITIAL STUDY
Pollutant
Averaging Time
State Standard
Federal:Standard
1 -Hour
0.09 ppm
--
Ozone
8 -Hour
--
0.08 ppm
1 -Hour
20 ppm
35 ppm
Carbon Monoxide (CO)
8 -Hour
9.0 ppm
9.0 ppm
Nitrogen Dioxide (NO2)
1 -Hour
0.25 ppm
--
Inhalable Particulate Matter
24 -Hour
--
65 ug/m3
(PM2.5)
Annual Arithmetic Mean
12 ug/m3
15 ug/m3
Inhalable Particulate Matter
24 -Hour
50 ug/m3
150 ug/m3
(PM10)
Annual Arithmetic Mean
20 ug/m3
50 ug/m3
1 -hour
0.25 ppm
--
Sulfur Dioxide (SO2)
24 -Hour
0.04 ppm
0.14 ppm
Notes:
ppm — parts per million
Ng - micrograms
Effects of Air Pollution
The primary chemical compounds that are considered pollutants emitted into or formed in the
atmosphere include ozone, oxides of nitrogen, sulfur dioxide, hydrocarbons, carbon monoxide,
and particulate matter.
Ozone is formed in the atmosphere through a complex series of chemical reactions generally
requiring light as an energy source. Ozone is a pungent, colorless gas that is a strong irritant
and attacks the respiratory system. Respiratory and cardiovascular diseases are aggravated by
exposure to ozone. A healthy person exposed to high concentrations of ozone may experience
nausea, dizziness, and burning in the chest. Ozone also damages crops and other vegetation.
Oxides of nitrogen (NOx), which are considered pollutants, include nitric oxide (NO) and nitrogen
dioxide (NO2). NO is colorless and odorless and is generally formed by combustion processes
combining atmospheric oxygen and nitrogen. NO2 is a reddish -brown irritating gas formed by
the combination of NO and oxygen in the atmosphere or at the emission source. Both NO and
NO2 are considered ozone precursors because they react with hydrocarbons and oxygen to
produce ozone. Exposure to NO2 may increase the potential for respiratory infections in children
and cause difficulty in breathing even among healthy persons and especially among asthmatics.
Sulfur dioxide (SO2) is a colorless, pungent, irritating gas which affects the upper respiratory
tract. Sulfur dioxide may combine with particulate matter and settle in the lungs, causing
damage to lung tissues. Sulfur dioxide may combine with water in the atmosphere to form
sulfuric acid that may fall as acid rain, damaging vegetation.
3-10
CITY OF ATASCADERO
INITIAL STUDY
Hydrocarbons include a wide variety of compounds containing hydrogen and carbon. Many
hydrocarbons (known as reactive organic gases [ROG]) react with NO and NO2 to form ozone.
Generally, ambient hydrocarbon concentrations do not cause adverse health effects directly, but
result in ozone formation.
Carbon monoxide (CO) is a colorless, odorless gas generally formed by incomplete combustion
of hydrocarbon -containing fuels. Carbon monoxide does not irritate the respiratory tract, but
does interfere with the ability of blood to carry oxygen to vital tissues.
Particulate matter consists of a wide variety of particle sizes and composition. Generally,
particles less than 10 microns (PM,o) are considered to be pollutants because they accumulate
in the lung tissues and may contain toxic materials which can be absorbed into the system.
Baseline Air Quality
Air quality in San Luis Obispo County is currently monitored at eight public agency and private
sector monitoring stations located throughout the County. The nearest station is located in
Atascadero (Lewis Avenue) approximately 500 feet northwest of the project site. The
Atascadero station monitors ozone, carbon monoxide, nitrogen dioxide, PM10 and PM2.5 levels.
Table 3.3-2 presents the maximum pollutant concentrations for 1 -hour and 8 -hour ozone and
PM10 that were recorded at this station from 2003 through 2005. This summary is taken from
APCD Air Quality Summary Data tables.
Table 3.3-2. Summary of Air Quality Standard Exceedances
Year
2003
2004
2005
Ozone 1 -hour (ppm)
Worst Hour
0.093
0.085
0.096
Number of State Exceedances (Days > 0.095 ppm)
0
0
1
Ozone 8 -hour (ppm)
Worst 8 -hour Period
0.076
0.076
0.084
Number of State Exceedances (Periods > 0.085 ppm)
0
0
0
PM,o (micrograms/cubic meter)
Worst Sample
57.0
42.0
24.0
Number of State Exceedances (Samples>50 ug/m3)
1
0
0
JUUI i, . J011 LUIJ %Julz pu 1- - UU
San Luis Obispo County has been identified as a non -attainment area PM10 by the ARB. San
Luis Obispo County has been designated a non -attainment area for the State 1 -hour ozone
standard since 1988. However, on December 5, 2003 the ARB proposed re -designating the
County as attainment because no ozone violations had been recorded during 2000-2003, and
that the County should be treated separately than the rest of the South Central Coast Air Basin
due to minimal ozone transport associated with intervening mountain ranges. The proposed re -
3 -11
CITY OF ATASCADERO
INITIAL STUDY
designation to attainment was finalized in January 2004; however, for 2007, non -attainment for
ozone is proposed due to an ozone violation and will eventually be reviewed and finalized (ARB,
2006). Maximum concentrations of other criteria pollutants are currently within Federal and
State standards.
Air Quality Management
The California Clean Air Act (CCAA), adopted in 1988, requires all air pollution control districts
and air quality management districts in the state to adopt and enforce regulations to achieve and
maintain air quality that is within the State air quality standards. San Luis Obispo County was
declared a "moderate" nonattainment area for the State ozone standard. The County did not
meet the December 31, 1997 deadline to attain the State 1 -hour ozone standard; therefore,
should have been reclassified as a "serious" nonattainment area. However, the ARB
determined that a change in classification would not result in a more expeditious attainment of
the standard. The County is also considered a nonattainment area for the State PM,o standard.
In response to the requirements of the CCAA, the APCD prepared the 1991 Clean Air Plan
(CAP) to provide a framework for the attainment of State air quality standards by the earliest
practicable date. The CAP is a comprehensive planning document intended to facilitate
attainment and maintenance of the State ozone standard. The 1995 CAP was developed as a
comprehensive update to the 1991 CAP and was expected to bring the County into attainment of
the State ozone standard by the end of 1997.
The 1995 CAP described the pollutants that affect County air quality, the sources of those
pollutants, and future year emissions that are anticipated under current growth trends. Based on
this information, the 1995 CAP also provides a control strategy for reducing emissions of ozone
precursors. Included in the 1995 CAP are a number of land use and circulation management
policies and programs that have already been implemented to reduce vehicular air emissions.
Additional measures recommended for adoption include trip reduction programs and
telecommuting.
A second update to the 1991 CAP was developed in 1998, as a continuation of the 1995 CAP
and proposes no new control measures for adoption. The 1998 CAP was expected to bring the
County into attainment with the State 1 -hour ozone standard by 2003.
The CAP was revised again in 2001, but did not include any new emissions control measures.
However, emissions of ROG and NOx are expected to decline through the year 2015. Due to
the lack of recorded violations of the State 1 -hour ozone standard, San Luis Obispo County was
re -designated an attainment area in January 2004.
San Luis Obispo County is in attainment of the Federal air quality standards and is not subject to
the planning requirements of the Federal Clean Air Act.
Thresholds of Significance
Significance thresholds have been developed by the San Luis Obispo County APCD and are
documented within the CEQA Air Quality Handbook (San Luis Obispo County APCD, 2003).
3-12
CITY OF ATASCADERO
INITIAL STUDY
Specifically, project emissions are considered potentially significant impacts if any of the
following thresholds are exceeded:
1. Operational Impacts:
Reactive Organic Gases (ROG), NO, SO2, PM10 10 lbs/day
CO 50 lbs/day
The APCD considers impacts significant and requires more stringent environmental review for
projects exceeding 25 lbs/day of ROG, NO, SO2 and PM,o emissions, or 550 lbs/day CO
emissions.
2. Construction Impacts:
ROG and NO,
PM10
185 Ibs/day or 2.5 tons/quarter
2.5 tons/quarter
The APCD requires Best Available Control Technology for construction equipment (CBACT) for
projects with ROG or NOx emissions between 2.5 and 6.0 tons per quarter and requires CBACT
plus further mitigation for projects with emissions exceeding 6.0 tons per quarter.
3. Air Quality Standards:
A project is considered to have a significant impact if its emissions are predicted to cause or
contribute to a violation of any ambient air quality standard.
4. Consistency:
Large projects must be found to be consistent with the District's Clean Air Plan (CAP). The
APCD notes that a consistency analysis is required for the following types of projects: general
plan updates and amendments, specific plans, area plans, large residential subdivisions and
large commercial/industrial developments. The proposed project is not considered a large
residential subdivision or large commercial development; therefore, a CAP consistency analysis
is not required.
5. Odors:
APCD Rule 402 states "A person shall not discharge from any source whatsoever such
quantities of air contaminants or other material which cause injury, detriment, nuisance or
annoyance to any considerable number of persons or to the public, or which endanger the
comfort, repose, health or safety of any such persons or the public, or which cause, or have a
natural tendency to cause, injury or damage to business or property." Violation of Rule 402 is
considered a significant impact.
Answers to Checklist Questions
Question A:
The proposed project would not result in an increase in population and would not create
substantial operational emissions. Although there was one recorded ozone violation recorded at
the Atascadero (Lewis Avenue) monitoring station in 2005, the nature of the project does not
lend itself to significant operational emissions and thus would not exacerbate the likelihood of
3-13
CITY OF ATASCA DERO
INITIAL STUDY
further exceedances. Rather, the project would result in a return to City Hall administrative
operations prior to the 2003 San Simeon Earthquake. It would not conflict with or obstruct
implementation of the APCD's CAP.
Questions B and C:
Due to the age of the City Hall, there is a strong possibility that materials slated for removal and
replacement contain asbestos and lead which could potentially become airborne; therefore,
mitigation measures addressing the sampling and safe removal and disposal of these materials
would be implemented (see Mitigation Measures AQ -1 and AQ -2). The APCD indicates that
buildings built before 1984 may contain asbestos -containing building materials.
San Luis Obispo County was recently designated an attainment area for the State and Federal
ozone standards. However, ozone concentrations in the project area exceeded applicable
standards once in 2005; therefore, non -attainment is proposed as of 2007. Construction activity
would not generate significant amounts of pollutant emissions. Although painting activities
would result in emissions of ROC and NOx (ozone precursors), significant amounts of paint
would not be applied; therefore, significant levels of emissions would not occur.
Question D:
Project -related construction emissions would cause minor increases of existing pollutant
concentrations at sensitive receptors in the project vicinity (see Questions B and C). No
emissions would be directly generated by project operations.
Question E:
Proposed work will not result in the long-term generation of odors. Minor amounts of
construction -related emissions may cause a short-term generation of odors, which could be
considered objectionable by some employees and visitors at Sunken Gardens. However,
construction activities would be short-term and odorous emissions would dissipate rapidly in the
air with increased distance from the source. Unauthorized personnel would not be allowed into
construction areas. Potential odor impacts are considered less than significant.
Mitigation
Mitigation Measure AQ -1. Prior to construction, the contractor shall prepare and submit for
approval, a health and safety plan for addressing asbestos issues. If asbestos is present, then
the APCD may require preparation of an Asbestos Health and Safety Program and dust
mitigation measures under guidance of the National Emission Standards for Hazardous Air
Pollutants (NESHAP). The APCD has the local responsibility to regulate material containing
more than 1 percent asbestos; therefore the City shall hire a licensed asbestos abatement
contractor if asbestos is known to be present. Mitigation measures would include stabilization of
debris by wetting and covering with plastic sheeting until they are removed. Furthermore, the
contractor hired to perform clean-up shall submit an asbestos notification form to the APCD.
3-14
CITY OF ATASCADERO
INITIAL STUDY
Mitigation Measure AQ -2. Prior construction, the City shall employ a qualified, independent
testing lab to conduct field sampling and lab testing of paint for detection of lead. This will
include removing paint samples from the building and testing for lead content. A report shall be
prepared indicating areas of detected lead, and a subsequent Lead Work Plan shall be
developed. If lead is detected, all loose paint and particles that could become airborne shall be
scraped from the building within an enclosed area covered with plastic sheeting to prevent lead -
containing particles from becoming airborne. With incorporation of mitigation, any potential lead
exposure to the public is considered a less than significant impact.
Finding
With the incorporation of mitigation, the proposed project would result in less than significant
impacts to air quality.
Less Than
Potentially Significant Less Than No
Significant with Significant
Initial Study 2006-0038 Impact Mitigation Impact Impact
City Hall Repair and Rehabilitation Project Incorporation
3.4. BIOLOGICAL RESOURCES -- Would the. project:
a) Have a substantial adverse effect, either directly or
through habitat modifications, on any species identified as a
candidate, sensitive, or special status species in local or
regional plans, policies, or regulations, or by the California
Department of Fish and Game or U.S. Fish and Wildlife
Service?
b) Have a substantial adverse effect on any riparian habitat
or other sensitive natural community identified in local or
regional plans, policies, or regulations or by the California
Department of Fish and Game or US Fish and Wildlife
Service?
c) Have a substantial adverse effect on federally protected
wetlands as defined by Section 404 of the Clean Water Act
(including, but not limited to, marsh, vernal pool, coastal,
etc.) through direct removal, filling, hydrological interruption,
or other means?
d) Interfere substantially with the movement of any native
® F-1resident
or migratory fish or wildlife species or with
established native resident or migratory wildlife corridors, or
impede the use of native wildlife nursery sites?
e) Conflict with any local policies or ordinances protecting
❑
biological resources, such as a tree preservation policy or
ordinance?
f) Conflict with the provisions of an adopted Habitat
El17
Conservation Plan, Natural Community Conservation Plan,
or other approved local, regional, or state habitat
conservation plan?
SOURCES: Project Description; Project Plans
3-15
Setting
CITY OF ATASCADERO
INITIAL STUDY
The proposed project site is located within the downtown area of the City and is contiguous to
urban development to the north, south, east, and west. There are no significant native
vegetative features on the site as the City Hall grounds have been fully landscaped and planted
with non-native evergreen conifers and ornamentals. The site is approximately one acre in size
and does not support any sensitive biological habitats or sensitive species. Four deodar cedar
trees and one Italian cypress tree will be removed prior to construction. All trees proposed for
removal are non-native trees.
Answers to Checklist Questions
Question A:
Due to the nature of the site's physical characteristics, no sensitive or special -status species
would be anticipated to occur on the site.
Question B:
No riparian habitats exist on the site.
Question C:
No wetland habitats exist on the site.
Question D:
The site is located within an urban environment in the downtown, and is not used as a wildlife
corridors or native wildlife nursery site. Four deodar cedar trees and one Italian cypress tree
which were planted on site approximately 90 years ago will be removed prior to the start
construction of the rehabilitation project. Mitigation has been included to prevent interference
with any migratory or nesting birds which may be located in the trees .
Question E:
As there are no native trees on the project site, the Atascadero Tree Ordinance would not apply
and the project would not conflict with the ordinance. However, any trees that may be removed
during construction would be replaced following construction.
Question F:
No adopted Habitat Conservation Plan, Natural Community Conservation Plan or other
approved local, regional state habitat conservation plan is applicable for the subject property.
KWl
Mitigation
CITY OF ATASCADERO
INITIAL STUDY
Mitigation Measure BR -1. Nesting Birds: Within one week of ground disturbance or tree
removal/trimming activities, if work occurs between March 15 and August 15, nesting bird
surveys shall be conducted. If construction activities must be conducted during this period,
nesting bird surveys shall take place within one week of habitat disturbance. If surveys do not
locate nesting birds, construction activities may be conducted. If nesting birds are located, no
construction activities shall occur within 100 feet of nests until chicks are fledged. Construction
activities shall observe a 300 -foot buffer for active raptor nests.
Findings
With the incorporation of mitigation, the proposed project would result in less than significant
impacts to biological resources.
Less Than
Potentially Significant Less Than No
Significant with Significant Impact
Initial Study 2006-0038 Impact Mitigation Impact
City Hall Repair and Rehabilitation Project Incorporation
3.5. CULTURAL RESOURCES -- Would the project:
a) Cause a substantial adverse change in the significance of
historical '15064.5?
®
❑
a resource as defined in
b) Cause a substantial adverse change in the significance of
'15064.5?
El
®
❑
an archaeological resource pursuant to
c) Directly or indirectly destroy a unique paleontological
f�71
❑
resource or site or unique geologic feature?
d) Disturb any human remains, including those interred
outside of formal cemeteries?
❑
SOURCES: Project Description, California Cultural and Historical Endowment, Review and Evaluation of Significance
of Impacts — Repair and Rehabilitation of Atascadero City Hall, Robert Bruce Anderson, Thomas Rex Hardy,
December 2006; Arborist Report and Tree Protection Plan, Davey Resource Group May 2010.
Introduction
The City contracted with Robert Bruce Anderson, Urban Conservation & Urban Design and
Thomas Rex Hardy, AIA, Historical Architect, both of whom meet the professional qualification
standards used by the National Park Service and as published in the Code of Federal
Regulations, 36 CFR Part 61 to perform identification, evaluation, registration, and treatment
activities for historical resources, including historic preservation and methods. Their services
were retained specifically for the purpose of conducting a detailed review and evaluation of the
significance of the project's impacts regarding the proposed repair and rehabilitation of the City
Hall, as identified in the project description, and per the requirements of CEQA.
Mr. Anderson is an urban designer and conservationist who specializes in the interpretation and
use of design standards and guidelines with respect to historic properties and cultural
landscapes. Mr. Hardy is a registered architect in the State of California whose practice focuses
on the design, materials, and adaptive use of historic structures. Mr. Anderson and Mr. Hardy
3-17
CITY OF ATASCADERO
INITIAL STUDY
meet the Secretary of Interior's Professional Qualifications Standards for Historic Architecture,
Historic Preservation Planning and/or Architectural History per the Code of Federal Regulations,
36 CDF Part 61.
Mr. Robert Bruce Anderson and Thomas Rex Hardy, AIA, prepared a report entitled "Review and
Evaluation of Significance of Impacts — Repair and Rehabilitation of Atascadero City Hall", 2006,
to review and evaluate the potential impacts(s) of the proposed project (first phase) on the
historical significance of City Hall. See Appendix B. This review and evaluation was conducted
pursuant to Section 15064.5, Article 5, of CEQA Guidelines, "Determining the Significance of
Impacts on Historical and Unique Archaeological Resources." and specifically to paragraph
(b)(3) of Section 15064.5: "Generally, a project that follows The Secretary of Interior's Standards
for the Treatment of Historic Properties with Guidelines for Preserving, Rehabilitating, Restoring
and Reconstructing Historic Buildings or the Secretary of the Interior's Standards for
Rehabilitation and Guidelines for Rehabilitating Historic Buildings (Weeks and Grimmer, 1995),
shall be considered as mitigated to a level of less than significant impact on the historical
resources".
Table 3.5-1 outlines the 55 work items that constitute the first phase of the project to repair and
rehabilitate the City Hall.
Setting
The City Hall, also known by its historic name, Administration Building, is an extraordinary civic
edifice that was designed by Walter D. Bliss of the prominent San Francisco office of Bliss &
Faville. The general contractor for the building was F.G. Engstrum. The building was erected
beginning in 1914, was completed in 1918, and was intended to serve as the administrative,
symbolic and architectural centerpiece of the Atascadero Colony, a planned community that was
envisioned by the publisher and entrepreneur, Edward Gardner Lewis.
The City Hall is a four-story domed structure, consisting of approximately 58,854 gross square
feet of floor area. Its architectural style indicates derivation from Italian Renaissance sources, an
influence also evident in the architecture of several other Bliss & Faville buildings. Below the
fourth floor, the building's structural systems consist of reinforced concrete floors and columns
and unreinforced masonry infill walls. Above the fourth floor, the structural systems consist of
wood floor and roof framing supported on unreinforced masonry bearing walls. The building is
raised on a podium foundation, and the building's distinctive plan is characterized by the
commanding presence of two rotundas, on the first and fourth floors. .
The building's exterior is clad with a textured yellow brick, offset with terra cotta and marble
ornament. The domed roof is tile and the lower roofs are composition. The eaves on the rile roof
are wood. Most of the windows are double -hung with wood sash, the noticeable exception being
the circular wood -sash windows on the third floor above the entries on Palma and Lewis
Avenues. Terra cotta is used to frame pedimented entries, and to finish arches, Ionic columns,
entablatures and soffits at entries. Allegedly all of the bricks used in construction of City Hall
were fabricated at a local brick plant located at the base of Pine Mountain, facing the Salinas
River and close to where Curbaril Avenue crosses the railroad tracks.
3-18
CITY OF ATASCADERO
INITIAL STUDY
The interior of City Hall consists primarily of three floors of circular corridors and offices which
surround a 40 -foot high, first floor rotunda; and a fourth floor with a meeting room, apartment,
kitchen and storage rooms which surround a 44 -foot high, fourth floor rotunda. In contrast to the
first three floors, the fourth floor lacks a circular corridor. The Palma and Lewis Avenue entries
feature two-story lobbies. The basement contains mechanical equipment rooms, service areas
and storerooms.
3-19
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CITY OF ATASCADERO
INITIAL STUDY
The first floor, or lower, rotunda is the defining and most impressive space of the building. The
dome's coffered ceiling, the fluted Ionic columns that support the dome, the molded plaster
chandelier suspended from a gilded central medallion, and four lunette windows cut into the
base of the dome at the third floor are major contributors to this exceptionally grand space. The
fourth floor, or upper, rotunda is an octagonal space which features eight square columns and
16 round columns with Corinthian capitals, a mezzanine level with plain railings, bays with round
and double -hung wood -sash windows, and an octagonal -shaped painted glass laylight that
terminates a dome ceiling covered with acoustical tile.
The second and third floors of offices are accessed from stairs located adjacent to the circular
corridors at south and west corners of the building, and an elevator located within the two-story
lobby at the Lewis Avenue entry. The fourth floor is accessible from a second set of stairs,
located at northwest and southeast axis points on the circular corridor of the third floor.
City Hall has experienced numerous alterations to its interior spaces since it first accommodated
offices of the Atascadero Colony beginning in 1918. In large measure, these alterations are the
result of numerous tenants who have occupied the building since its original construction. The
building's alterations and tenants are chronicled in detail in the 1988 Historic Structures Report
prepared for the City of Atascadero by the Office of Alice Carey, Architects. It is noteworthy that
the structure's exterior has experienced relatively few alterations, the most obvious of which are
the following: installation of non -historic glazing and doors at the four entries; demolition of
historic building fabric at the west corner of the building, to accommodate installation of a new
exit door at grade; installation of an accessibility ramp at the Lewis Avenue entry; and demolition
of historic building fabric on the third floor of the Palma Avenue facade, to accommodate
installation of four new windows. It should be noted that this last intervention, on the basis of
historic photos, occurred early in the history of this building.
The site surrounding City Hall includes six large deodar cedar trees and one Italian cypress.
Based on historic photographic evidence and the size of the trees, staff has concluded that
these are the remaining trees from a formal landscape which was planted a few years after
completion of the original City Hall building. The arborist estimates that these trees are about 90
years old. The site was originally fully landscaped with lawns, shrubbery, trees, and fountains.
Most of the landscape was either previously removed or has not been maintained since the
earthquake. Demolition and construction of the proposed project will create major impacts to the
remaining trees on site, including compaction of the roots, and vertical clearance of the limbs to
utilize scaffolding and equipment. Four (4) of the deodar cedar trees and one (1) Italian cypress
are proposed to be removed in order to access the building and complete the repairs. The two
(2) deodar cedar trees in the front of the building on Palma Avenue will be protected during
construction in an effort to save the most visible trees on the site. New landscape will be
installed after completion of the construction.
Atascadero City Hall was listed in the National Register of Historic Places in 1977 (#77000336)
and was registered in 1984 as California Historical Landmark No. 958.
Zoning of Character -Defining Features
CC1iL!
CITY OF ATASCADERO
INITIAL STUDY
The project analysis includes a series of zoning diagrams developed to assist the City, other
public agencies, and the general public in understanding the historical importance of varying
spaces and features within the building and its exterior elevations. This method provides a
common sense approach to repair and rehabilitation work to damaged or previously altered
portions of the City Hall, and allows the removal of non -historic elements and alterations. The
zoning diagrams (see Figures 3.5-1 through 3.5-9) are defined in conjunction with the text
definitions for each of the following zones: Preservation Zone; Rehabilitation Zone; and Free
Zone.
3-35
December 2006
Project No. 0602-2391
Source: Historical Significance Report, Anderson and Hardy 2006
padre ZONING OF CHARACTER -DEFINING FEATURES
associates, inc.
Existing Basement Level Floor Plan
ENGINEERS, GEOLOGISTS i
El ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-1
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Source: Historical Significance Report, Anderson and Hardy 2006
padre ZONING OF CHARACTER -DEFINING FEATURES
associates, inc.
Existing Basement Level Floor Plan
ENGINEERS, GEOLOGISTS i
El ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-1
This Page Intentionally Left Blank
3-37
CITY OF ATASCADERO
INITIAL STUDY
December 2006
Project No. 0602-2391
Source: Historical Significance Report, Anderson and Hardy 2006
padressociates,Ine. ZONING OF CHARACTER -DEFINING FEATURES
Existing First Floor Plan
ENGINEERS, GEOLOGISTS i
® ENVIRONMENTAL SCIENTGTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-2
7� �x
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This Page Intentionally Left Blank
3-39
CITY OF ATASCADERO
INITIAL STUDY
December 2006
Project No. 0602-2391
ss:-saAix t7 7. o
i +,:i
3 R 1
Source: Historical Significance Report, Anderson and Hardy 2006
padre ZONING OF CHARACTER -DEFINING FEATURES
associates, inc.
Existing Second Floor Plan
ENGINEERS, GEOLOGISTS i
El ENVIRONMENTAL SCIENTIM
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-3
r4.
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Source: Historical Significance Report, Anderson and Hardy 2006
padre ZONING OF CHARACTER -DEFINING FEATURES
associates, inc.
Existing Second Floor Plan
ENGINEERS, GEOLOGISTS i
El ENVIRONMENTAL SCIENTIM
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-3
-ATASCAnP,Ap.
This Page Intentionally Left Blank
3-41
CITY OF ATASCADERO
INITIAL STUDY
December 2006
Project No. 0602-2391
Source: Historical Significance Report, Anderson and Hardy 2006
PAOExre ZONING OF CHARACTER -DEFINING FEATURES
s,inc.
isting Third Floor Plan
ENGINEERS, GEOLOGISTS 6
ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-4
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Source: Historical Significance Report, Anderson and Hardy 2006
PAOExre ZONING OF CHARACTER -DEFINING FEATURES
s,inc.
isting Third Floor Plan
ENGINEERS, GEOLOGISTS 6
ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-4
This Page Intentionally Left Blank
3-43
CITY OF ATASCADERO
INITIAL STUDY
December 2006
Project No. 0602-2391
I JLi
" Noah
Source: Historical Significance Report, Anderson and Hardy 2006
passociates,ine.dre ZONING OF CHARACTER -DEFINING FEATURES
Existing Fourth Floor Plan
ENGINEERS, GEOLOGISTS i
El ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-5
. -_.
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Source: Historical Significance Report, Anderson and Hardy 2006
passociates,ine.dre ZONING OF CHARACTER -DEFINING FEATURES
Existing Fourth Floor Plan
ENGINEERS, GEOLOGISTS i
El ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-5
This Page Intentionally Left Blank
3-45
CITY OF ATASCADERO
INITIAL STUDY
December 2006
Project No. 0602-2391
Narrh
Source: Historical Significance Report, Anderson and Hardy 2006
OF CHARACTER -DEFINING FEATURES
ZONING
� re Existing Upper Rotunda Mezzanine Plan
associates, inc.
ENGINEERS, GEOLOGISTS L
ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-6
This Page Intentionally Left Blank
3-47
CITY OF ATASCADERO
INITIAL STUnY
December 2006
Project No. 0602-2391
Source: Historical Significance Report, Anderson and Hardy 2006
ZONING OF CHARACTER -DEFINING FEATURES
re Existing Roof Plan
pssociates, inc.
ENGINEERS, GEOLOGISTS &
ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-7
.............
ATO I -tb
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Source: Historical Significance Report, Anderson and Hardy 2006
ZONING OF CHARACTER -DEFINING FEATURES
re Existing Roof Plan
pssociates, inc.
ENGINEERS, GEOLOGISTS &
ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-7
ATO I -tb
�21
"A'
tx-o
Source: Historical Significance Report, Anderson and Hardy 2006
ZONING OF CHARACTER -DEFINING FEATURES
re Existing Roof Plan
pssociates, inc.
ENGINEERS, GEOLOGISTS &
ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-7
This Page Intentionally Left Blank
3-49
I
CITY OF ATASCADERO
INITIAL STUDY
December 2006
Project No. 0602-2391
Source: Historical Significance Report, Anderson and Hardy 2006
padres ZONING OF CHARACTER -DEFINING FEATURES
associates,inc.
Existing Section A
ENGINEERS, GEOLOGISTS L
El ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-8
This Page Intentionally Left Blank
3-51
r
CITY OFATASCADERO
INITIAL STUDY
December 2006
Project No. 0602-2391
aource: historical Slgniticance Report, Anderson and Hardy 2006
padre ZONING OF CHARACTER -DEFINING FEATURES
associates, inc. Existing Section B
ENGINEERS, GEOLOGISTS L
ENVIRONMENTAL SCIENTISTS
Atascadero City Hall Repair Project IS/MND FIGURE 3.5-9
This Page Intentionally Left Blank
3-53
CITY OF ATASCADERO
INITIAL STUDY
CITY OF ATASCADERO
INITIAL STUDY
Zoning of character -defining features of Atascadero's City Hall can be an instructive tool to
assist in the review and evaluation of significance of impacts of the project's first phase work
items. It also can serve as a valuable tool in the formulation of design and program decisions
yet to be made for the anticipated second and third phases of the project to repair and
rehabilitate City Hall. Additionally, with the use of diagrams, zoning can present interested
parties with a visual appreciation of a historic structure's character -defining spaces and
elevations.
Preservation Zone
Character -defining features included in this category or zone are those that are to be
PRESERVED and/or RESTORED. These features are of primary importance to sustain the
historic integrity of the property, and thus should be appropriately repaired, maintained or
reconstructed to match their original appearance and/or configuration. This zone also may
include features that are not considered to be of primary importance, and, as such, do not
warrant preservation or restoration. Particular care must be exercised when dealing with
features within this category. For illustrative purposes, character -defining features included in
this category are zoned in RED in the illustrated plans and sections (Figures 3.5-1 through 3.5-
9). (NB. As all of City Hall's exterior elevations are of primary importance and therefore fall
entirely within this zone, zoning of the structure's exterior elevations is not illustrated in the
diagrams that follow.) Guideline for project actions contemplated within this category, "Stop. Be
very careful before proceeding".
Rehabilitation Zone
Character -defining features included in this category or zone are those that could be
REHABILITATED. These features are of secondary architectural or historical significance, but
nonetheless possess qualities or character that relate them to features of primary importance.
Alteration of features in this category can be accommodated so long as the qualities or character
that relate these features to features of primary importance are preserved, and the new work is
visual]y compatible with features of primary importance. The character -defining features
included in this category are zoned in YELLOW in the illustrated plans and sections. Guideline
for project actions contemplated within this category, "Slow down and only proceed with
caution".
Free Zone
Character -defining features included in this category or zone are those that are eligible for major
RE -DESIGN or REMOVAL. These features may be viewed as being essential for use and
enjoyment of the property; however, such features do not contribute to the property's historical
significance or integrity. The size, placement and use of materials of these features can
negatively affect or impact features of primary or secondary importance. Accordingly, while
major alteration, re -design or removal of features within this zone is not of particular concern,
care still must be exercised that such changes do not compromise or diminish the integrity of
features of primary or secondary importance. The character -defining features included in this
3-54
CITY OF ATASCADERO
INITIAL STUDY
category are zoned in GREEN in the illustrated plans and sections. Guideline for project actions
contemplated within this category, "You are free to proceed".
Thresholds of Significance
Based on the mandatory findings of significance criteria at Section 15065 and Appendix G of the
State CEQA Guidelines (Governor's Office of Planning and Research, 1999), an impact would
be significant if any of the following conditions, or potential thereof, would result with
implementation of the Proposed Project:
1. Cause a substantial adverse change in the significance of a historical resource as
defined in Section 15065.5;
2. Cause a substantial adverse change in the significance of an archaeological
resource pursuant to Section 15064.5; or,
3. Disturb any human remains, including those interred outside of formal cemeteries.
Section 15064.5 defines a significant adverse effect to include any activity that would: (1) Create
a substantially adverse change in the significance of a historical resource including physical
demolition, destruction, relocation, or alteration of the resource or its immediate surroundings,
such that the significance of a historical resource would be materially impaired; and/or (2) alter or
materially impair the significance of a historical resource.
Section 15064.5 of the CEQA Guidelines defines significant historic resources to include:
A resource listed in, or determined eligible by the State Historical Resources
Commission, for listing in the California Register of Historical Resources (Pub. Res.
Code SS5024.1, Title 14 CCR, Section 4850 et seq.).
A resource included in a local register of historical resources, as defined in section
5020.1(k) of the Public Resources Code or identified as significant in a historical
resource survey meeting the requirements section 5024.1(g) of the Public Resources
Code, shall be presumed to be historically or culturally significant.
Any object, building, structure, site, area, place, record, or manuscript which a lead
agency determines to be historically significant or significant in the architectural,
engineering, scientific, economic, agricultural, educational, social, political, military, or
cultural annals of California may be considered to be a historical resource, provided the
lead agency's determination is supported by substantial evidence in light of the whole
record including the following: (A) Is associated with events that have made a significant
contribution to the broad patterns of California's history and cultural heritage; (B) Is
associated with the lives of persons important in our past; (C) Embodies the distinctive
characteristics of a type, period, region, or method of construction, or represents the
work of an important creative individual, or possesses high artistic values; or (D) Has
yielded, or may be likely to yield, information important in prehistory or history.
3-55
I*_
CITY OF ATASCADERO
INITIAL STUDY
The fact that a resource is not listed in, or determined to be eligible for listing in the California
Register of Historical Resources, not included in a local register of historical resources (pursuant
to section 5020.1(k) of the Public Resources Code), or identified in a historical resources survey
(meeting the criteria in section 5024.1(g) of the Public Resources Code) does not preclude a
lead agency from determining that the resource may be a historical resource as defined in Public
Resources Code sections 5020.10) or 5024.1.
Section 15064.5 of CEQA defines material alteration of a significant resource to include any
activity that:
Demolishes or materially alters in an adverse manner those physical characteristics of a
historical resource that convey its historical significance and that justify its inclusion in, or
eligibility for inclusion, in the California Register of Historical Resources; or
Demolishes or materially alters in an adverse manner those physical characteristics that
account for its inclusion in a local register of historical resources pursuant to section
5020.1(k) of the Public Resources Code or its identification in a historical resources
survey meeting the requirements of section 5024.1(8) of the Public Resources Code,
unless the public agency reviewing the effects of the project establishes by a
preponderance of evidence that the resource is not historically or culturally significant; or,
Demolishes or materially alters in an adverse manner those physical characteristics of a
historical resource that convey its historical significance and that justify its eligibility for
inclusion in the California Register of Historical Resources as determined by a lead
agency for purposes of CEQA.
Section 7050.5 of the Health and Safety Code, states that in the event human remains are
discovered during excavation, work must stop immediately and the County Coroner must be
contacted. Section 5097.94 and 5097.98 of the Public Resources Code require consultation
with the Native American Heritage Commission, protection of Native American remains, and
notification of most likely descendants. SB 447 (Chapter 404, Statutes of 1987) also protects
Native American remains or associated -grave goods.
Section 15064.5 of the CEQA Guidelines defines significant historic resources to include:
A resource listed in or determined to be eligible by the State Historical Resources
Commission, for listing in the California Register of Historical Resources (Pub. Res.
Code SS5024.1, Title CCR. Section 4850 et seq.).
Mr. Anderson and Mr. Hardy reviewed and evaluated the project's potential impact of the 55
specific work items listed in Section 2.5 based on:
• Site visits to observe and record existing conditions of character -defining features;
• Review of existing reports, documents and drawings as specifically relevant to repair
and rehabilitation of the historic City Hall structure;
ERIC]
A'�GD�o•
CITY OF ATASCADERO
INITIAL STUDY
• Meetings with City staff, the project architect (Ms. Stephanie Kingsworth, AIA, of
Pfeiffer Partners) and past president of the Atascadero Historical Society (Mr. Lon
Allen) to obtain additional information and clarification regarding
• The nature and extent of certain work items;
• Simplification of as -built drawings to serve as plan and section drawings for use in
this report;
• "Zoning" of the historic structure's character -defining features, as defined and
illustrated in plans and sections;
• Construction of a matrix that summarizes information for each of the 55 project's first
phase work items, including location by zone, reference to Pfeiffer Partners
documents, nature and extent of procedure, and impact(s); and,
• A more detailed description and evaluation of potential impact of certain work items.
Answers to Checklist Answers
Question A:
Mr. Anderson and Mr. Hardy's report (Appendix C) concluded that the impacts to historic
resources from carrying out the 55 work items that constitute the first phase of the project to
repair and rehabilitate the City Hall are:
• 24 scope items are unlikely to have any appreciate impact because these items
involve actions and procedures that are designed to clean, patch, repair or restore
material, finishes or other features of the building's historic fabric;
• 13 scope items are unlikely to have any appreciate impact because these items
involve system upgrade and repair actions and procedures that are designed to
address deferred maintenance of the building's infrastructure;
• 5 scope items are unlikely to have any appreciate impact because these items
involve repair actions and procedures that are designed to restore the appearance
and/or provide weather protection of original paint coatings;
• 5 scope items are likely to have an impact ranging from neutral to positive because
these items involve actions and procedures that are designed to either restore
original design and character -defining features of the lower and upper rotundas or to
enhance appreciation of the two rotundas;
• 2 scope items are likely to have an impact ranging from neutral to positive because
these items involve collateral actions and procedures to strengthen bracing of the
3-57
"�I 5�'� CITY OF ATASCADERO
;� INITIAL STUDY
parapet walls, remove non -historic CMU infill in parapet balustrade, and install new
terra cotta balusters in parapet;
• 1 scope item is likely to have an impact ranging from neutral to positive because this
item involves an action and procedure to restore the visual effect of skylight openings
above two main staircases;
• 1 scope item is likely to have an impact ranging from neutral to positive because this
item involves actions and procedures to remove the building's non -historic aluminum
entry doors and transoms and replace them with installation of new Hope's steel
doors and transoms that are configured and fabricated to match historic sizes and
patterns;
• 1 scope item is likely to have an impact ranging from non-existent to neutral because
the item may involve collateral actions and procedures to install below -grade
waterproofing membrane to foundation walls, contingent upon approval to re -level
the building in a subsequent phase(s) of the project; and
• 1 scope item is likely to have an impact ranging from non-existent to neutral because
the item may involve collateral actions and procedures to demolish historic fabric,
reconfigure exterior masonry and install new life -safety exit door to match the existing
life -safety exit door alteration at opposite corner of the building, with the existing life -
safety door to be replaced to match the new life -safety exit door. This scope item is
contingent upon program decisions and occupancy loads not yet determined, and in
turn, decisions by the fire marshal regarding necessary and appropriate life -safety
measures for public assembly and use of City Hall.
In summary, the 55 work items of the first phase of the project to repair and rehabilitate the
historically significant City Hall are consist with, and in general conform to, applicable policies
and procedures of The Secretary of the Interior's Standards for Rehabilitation and Guidelines for
Rehabilitating Historic Buildings. Therefore, and pursuant to Section 15064.5 (b) (3) of Article 5
of CEQA Guidelines, the first phase would result in a level of less than significant impact on the
character -defining features and historic integrity of City Hall.
The 2006 MND for the City Hall reconstruction identified all existing trees on the site to remain.
As part of the deconstruction permit process, staff requested the City Arborist, Davey Resource
Group prepare a tree protection plan for City Hall that would preserve the seven trees consistent
with the original 2006 MND. The arborist estimates that these trees are about 90 years old.
Deodar Cedars typically have a life span around 130 years if well maintained, and are therefore
toward the end of there lifespan. The arborist found that the trees on site were in fair to poor
condition. The trees have not been maintained over the years, resulting in large limb failures.
Most of the tree have co -dominant or poor structure and some are beginning to thin. The Italian
Cypress is also in poor condition, and likely at the end of its life span. All of these large, mature
trees are located in close proximity to the City Hall building.
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• pyscwe�
CITY OF ATASCADERO
INITIAL STUDY
During the course of the project planning, it has become apparent that the necessary work
cannot be safely performed without clear access to specific areas of the site. The work plan
calls for excavation of the perimeter of the building foundation and free standing scaffoldings on
the exterior, in addition to use of large, heavy equipment throughout the site. A 20 foot clear
area around the building is required. In order to accomplish this, significant pruning of the trees
would be required and much of the critical root zone would be disturbed and compacted over the
two to three year construction period. The limbs of the trees would need to be raised and cut
back away from the building, causing irreversible damage. As a result, there is a high probability
that the trees would not survive the construction process despite the City's best efforts for
protection. The project contractor has concerns about the working around any trees on the site
including:
• Stability and maintenance of root protection drive path tree protection matting.
• Constraints on perimeter foundation excavations and stockpiles.
• Safety of crews and equipment working on root protection matting areas.
• Increased costs of avoiding, pruning and working around trees.
• Trees will be heavily impacted and damaged during construction, requiring removal later
In order to accommodate the repair work, staff has reviewed the possibility of removing certain
trees around City Hall. Neither the Deodar Cedar or the Italian Cypress are native trees that are
protected by the City's Tree Protection Ordinance. However, the trees are part of the historic
setting of the Atascadero City Hall and therefore covered under the National Register of Historic
Places designation. Based on historic photographic evidence and the size of the trees, staff has
concluded that all of these trees were probably planted within the first ten years of the
completion of City Hall. Originally, there were eight deodar cedar trees and many Italian cypress
trees surrounding the building. Many of the original trees have been removed, and those that
remain have not been maintained or properly pruned over the years. The two deodar cedars on
East Mall and the Italian cypress have limited off-site visibility and tend to block view of City Hall
rather than enhance views of City Hall. Staff believes these trees have limited value as
character -defining features of the site. Therefore, the two deodar cedar trees on East Mall, the
two on Lewis Ave, and the Italian cypress will be removed for construction. The two deodar
cedar trees located next to the Sunken Gardens off Palma are considered to have the most
charter defining significance, and therefore, these trees will be protected during construction.
Removal of the trees on Lewis and East Mall will provide adequate room to complete the
construction work while decreasing the impact on the trees on Palma. All efforts shall be made
to save the two remaining trees on Palma. Tree protection will be installed in an attempt to
protect these trees during construction. Equipment shall not be used in the critical root zone,
and matting shall be used to protect the roots.
All tree removals shall be mitigated through replanting on site. As most of these trees are not in
good condition and are already beginning to fail, replacing them with new healthy landscape will
ensure that the landscape is in good condition and continues to enhance the historic site.
Question B:
The project is not expected to disturb archaeological resources.
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Question C:
CITY OF ATASCADERO
INITIAL STUDY
Although no paleontological surveys have been done, the project site has been previously
disturbed, and therefore the likelihood of encountering such resources would be minimal.
Question D:
The project is not expected to disturb any known human remains, including those interred
outside of a formal cemetery.
Mitigation
Mitigation Measure CR -1. The two deodar cedar trees on Palma Ave. shall be protected during
construction. All reasonable efforts to save these trees shall be made. A tree protection plan
shall be prepared by a certified arborist and all required protection measures will be installed and
maintained throughout construction.
Findings
With the incorporation of mitigation, the proposed project would result in less than significant
impacts to cultural resources.
i •1
Less Than
Potentially
Significant
Less Than
No
Initial Study 2006-0038
Significant
Impact
with
Mitigation
Significant
Impact
Impact
City Hall Repair and Rehabilitation Project
Incorporation
3.6. GEOLOGY AND SOILS -- Would the project:
a) Expose people or structures to potential substantial
effects, including
❑
Eladverse
LEI
the risk of loss, injury, or death
involving:
i) Rupture of a known earthquake fault, as delineated
on the most Alquist-Priolo
❑
❑
recent Earthquake Fault
Zoning Map issued by the State Geologist for the area
or based on other substantial evidence of a known
fault? Refer to Division of Mines and Geology Special
Publication 42.
ii) Strong seismic ground shaking?
❑
®
❑
❑
iii) Seismic -related ground failure, including
liquefaction?
❑
❑
❑
iv) Landslides?
❑
❑
❑
b) Result in substantial soil erosion or the loss of topsoil?
❑
❑
c) Be located on a geologic unit or soil that is unstable, or
that would become unstable as a result of the project, and
®
❑
❑
potentially result in on- or off-site landslide, lateral
spreading, subsidence, liquefaction or collapse?
d) Be located on expansive soil, as defined in Table 18-1-B
i •1
CITY OF ATASCADERO
INITIAL STUDY
of the Uniform Building Code (1994), creating substantial ❑ ® ❑
risks to life or property?
e) Have soils incapable of adequately supporting the use of ❑
septic tanks or alternative wastewater disposal systems
where sewers are not available for the disposal of
wastewater?
SOURCES: Project Description, Planning Staff Site Visit, Land Use Element EIR; West Front Villages IS/MND (City
of Atascadero); Soils Engineering Report (Earth Systems Pacific 2004)
Setting
The site lies within the southern part of the Salinas River Valley, east of the Santa Lucia
Mountain Range. The Salinas River is approximately a mile and quarter east of the site. The
trend of the Salinas River is to the northwest and is predominately controlled by the regional
northwest trending Rinconada and San Andreas Fault zones. The Rinconada and San Andreas
faults are active northwest trending faults that lie within the general region of the site. These
faults are situated east of the site.
The Geologic Map of the Santa Margarita area by Hart (1976) indicates that sedimentary rock
units, younger alluvium and older alluvium underlie the site. The rock units generally consist of
sandstone and shale of the Santa Margarita formation and cherty shale of the Monterey
formation. Except for the northern part of the site, the hillsides are capped by older alluvium.
The older alluvium was probably deposited thousands of years ago by Paloma Creek when the
elevation of the creek was much higher. The northernmost hillside is capped with a thin layer of
topsoil overlying shale of the Santa Margarita formation. Younger alluvium lies within the
drainage valleys.
Faulting
The site is situated among four active faults: The Hosgri-San Simeon, the San Andreas, the Los
Osos and the Rinconada.
Rinconada Fault. The Rinconada Fault is the closest mapped active fault to the site, being
approximately 2 miles to the northeast. Vertical displacements across the fault apparently were
dominant in the Paleocene and Oligocene; however, the fault has accommodated approximately
11 miles of right -lateral offset from the Miocene to the present (Dibblee, 1976). Dibblee, Jr. has
indicated that the youngest unit or formation offset by the fault system is the Pliocene -
Pleistocene Paso Robles formation, and that the fault system probably has not offset older
alluvium, which is estimated to be 50,000 to 500,000 years old. Major displacement of the Plio-
Pleistocene Paso Robles formation, offset drainages, strong geomorphic expression, and
apparent displacements of older alluvium further indicated a late Pleistocene and possible
Holocene age for the most recent activity of the Fault (Dibblee, 1976; Hart, 1976). However, the
age of the most recent displacement on the Rinconada fault is not known, and further extensive
investigation would be required to determine its activity. Although no ground rupture has been
mapped in Holocene time on the Rinconada fault, there have been small to moderate
earthquakes (<5.9 magnitude) that have been recorded in the vicinity of the fault during the last
200 years, indicating that the fault is active. It is possible that the shock waves produced by
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CITY OF ATASCADERO
INITIAL STUDY
these earthquakes did not have enough energy to break the ground surface or cause any
ground surface displacement.
Los Osos Fault. The Los Fault, located southwest, is considered to be a west -northwest -
trending reverse fault on the south side of the Los Osos Valley. The Los Osos fault is divided
into four segments. The most westerly segment of the fault is the Estero Bay segment, which
lies mostly offshore. The Irish Hills segment starts in the vicinity of Los Osos and extends to just
past San Luis Obispo Creek. A two-mile length of this segment west of Laguna Lake is
considered to be active (Treiman, 1989) and is designated as an Earthquake Fault Zone (Hard,
1997. revised). The other two segments of the Los Osos fault are the Lopez Reservoir segment
and the Newsome Ridge segment, located southeast of the Irish Hill segment. The Los Osos
fault is capable of generating a maximum moment earthquake of magnitude 6.8; the recurrence
interval for an earthquake of this magnitude is approximately 1,925 years (Peterson and et. al.,
1996).
Hosgri-San Simeon Fault. The Hosgri-San Simeon fault is also an active fault within a relatively
close proximity to the -site; it is located west of the site. This fault system extends from San
Simeon to an ocean shelf 2 miles west of Point Buchon, and then trends toward the Point Sal
area. The fault is a northwest trending strike slip fault. It is considered active by the U.S.
Geological Survey based on Hall's claims of recent offset terrace deposits along San Simeon
Cove and also by a relocation of the 1927 "Lompoc" earthquake onto the southern end of the
fault (Hall, 1976, 1977). In addition, PG&E suggested that the Hosgri segment of the fault is
active after reviewing seismic reflection survey data (PG&E, 1988).
San Andreas Fault. The 1857 fault segment of the active San Andreas fault is located northeast
of the site. The last major quake on the 1857 fault segment was the 1857 earthquake that had a
magnitude of 7.8. The 1857 fault rupture included the Parkfield, Cholame, Carrizo, and Mojave
fault segments.
Geotechnical Investigation
A Soils Engineering Report for the City Hall Repair and Rehabilitation Project was prepared by
Earth Systems Pacific in 2004. The report addressed and analyzed subsurface soil conditions
including a general soil profile, a first floor level survey, and a seismic analysis. The general soil
profile is that of medium stiff to stiff sandy silt and sandy lean clay. Subsurface water was
encountered at depths of 23 to 28 feet. Liquefaction and dynamic settlement analysis is
addressed in Questions A -D. The results of the first floor level survey indicate that the western
portion of the building has settled approximately seven inches as a result of the earthquake. A
number of geotechnical recommendations were identified to protect from further settlement and
have been incorporated into Mitigation Measure GEO-1.
3-62
Answers to Checklist Questions
Question A -D:
CITY OF ATASCADERO
INITIAL STUDY
The project is located near the Rinconada fault zone (Seismic Zone 4). The Rinconada fault is a
"type B" fault, which refers to a 6.5 to 7.0 magnitude earthquake and a slip rate between 2 to 5
mm/year. Other active faults in the area, primarily the San Andreas Fault, may result in
significant seismic events during the life of the proposed structure. The property contains no
unusual geological formations. Although the City Hall building was significantly damaged during
the earthquake, no incidence of surface liquefaction was recorded at the site. However, using
the analytical method by Youd and Idriss (2001), Earth Systems Pacific, the geotechnical
consultant for the project, concluded that liquefaction could occur from the groundwater level to
a depth of about 50 feet and potentially create four to six inches of dynamic settlement. A
variety of detailed recommendations pertaining to this geologic hazard and other seismic
analysis are included as Appendix C.
As the topography of the site is level, landsliding is not considered a significant geologic hazard.
Expansive soils were noted as being a significant hazard by the geotechnical report.
Question E:
The project will not require a septic system.
Mitigation
Mitigation Measure GEO-1. The City shall implement the preliminary geotechnical
recommendations contained in the Soils Engineering Report (Appendix C) and/or measures
identified through subsequent engineering design to minimize impacts to geology and soils.
Finding
With incorporation of mitigation, impacts would be less than significant.
Less Than
Potentially
Significant
Less Than
No
Initial Study 2006-0038
Significant
Impact
with
Mitigation
Significant
Impact
Impact
City Hall Repair and Rehabilitation Project
Incorporation
3.7. Hazards and Hazardous Materials-- Would the
project:
a) Create a significant hazard to the public or the
environment through the transport,
❑
®
❑
❑
routine use or disposal of
hazardous materials?
b) Create a significant hazard to the public or the
environment through reasonably foreseeable
❑
®
❑
❑
upset and
accident conditions involving the release of hazardous
materials into the environment?
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CITY OF ATASCADERO
INITIAL STUDY
c) Emit hazardous emissions or handle hazardous or acutely ❑
hazardous material, substances, or waste within one-quarter
mile of an existing or proposed school?
d) Be located on a site which is included on a list of
hazardous materials sites compiled pursuant to Government
Code Section 65962.5 and, as a result, would it create a
significant hazard to the public or environment?
e) For a project located within in an airport land use plan ❑
area or, where such a plan has not been adopted, within two F-1 1:1
miles of a public airport or public use airport, would the
project result in a safety hazard for people living or working
in the project area?
f) For a project located within the vicinity of a private airstrip, ❑
would the project result in a safety hazard for people living or
working in the project area?
g) Impair implementation of or physically interfere with an 1:1adopted emergency response plan or emergency evacuation
El plan?
h) Expose people or structures to a significant risk of loss,
injury or death involving wildland fires, including where
wildlands are adjacent to urbanized areas or where
residences are intermixed with wildlands?
SOURCES: Project description, General Plan Land Use Element; Site Visit
Environmental Setting
Atascadero Junior High School is located directly adjacent to the project site to the north, on the
north side of Lewis Avenue.
Answers to Checklist Questions
Question A -B:
During implementation of specific items of work delineated as part of the proposed project, minor
amounts of hazardous materials such as fuels, oils, and solvents may be used. Releases of
these materials could potentially occur, but would be small in scale and quickly cleaned up. No
significant disturbance of soils would occur.
Due to the age of the City Hall, there is a strong possibility that materials slated for removal and
replacement contain asbestos and lead which could potentially become airborne; therefore,
mitigation measures addressing the sampling and safe removal and disposal of these materials
would be implemented (see Mitigation Measures AQ -1 and AQ -2). The APCD indicates that
buildings built before 1984 may contain asbestos -containing building materials; therefore, the
health and safety of workers and nearby residents must be addressed. The mitigation measures
referenced above contain hazardous material release prevention and remediation objectives that
shall be implemented as part of the proposed project.
3-64
Question C:
CITY OFATASCADERO
. INITIAL STUDY
The project site is located adjacent to an existing school (Atascadero Junior High School).
Hazardous emissions or acutely hazardous materials or wastes would potentially be
encountered in the project (asbestos and lead); however, the potential for emissions or releases
would be mitigated by Mitigation Measure AQ -1 and AQ -2. Use of hazardous materials or
disposal of hazardous wastes would be limited to short-term construction activity only.
Operation of the City Hall upon project completion would not create any risks associated with
hazards or hazardous materials.
Question D:
The project is not listed on the State Hazardous Waste and Substance Site list.
Question E -F:
The property is not near an airport.
Question G -H:
The site is within the Fire Department's seven -minute response area.
Mitigation
Mitigation Measure HAZ-1: Implement Mitigation Measures AQ -1 and AQ -2.
Finding
With the incorporation of mitigation, the proposed project would result in less than significant
impacts to hazards and hazardous materials.
Less Than
Potentially Significant Less Than No
Significant with Significant Impact
Initial Study 2006-0038 Impact Mitigation Impact p
City Hall Repair and Rehabilitation Project Incorporation
3.8. HYDROLOGY AND WATER QUALITY -- Would the
project:
a) Violate any water quality standards or waste discharge ® Elrequirements?
b) Substantially deplete groundwater supplies or interfere ® ❑
substantially with groundwater recharge such that there
would be a net deficit in aquifer volume or a lowering of the
local groundwater table level (e.g., the production rate of
previously -existing nearby wells would drop to a level that
would not support existing land uses or planned uses for
which permits have been granted)?
3-65
SOURCES: Project description, Flood Insurance Rate Map 060700 0003 B (1/20/82); Site Visit
Setting
Natural drainage courses within the City include Atascadero, Graves and Paloma Creeks, and
the Salinas River. Water quality in the creeks and groundwater basin is affected by surface
drainage and pollution. Construction in the areas that directly or indirectly drain to waterways
results in disturbance of surface soils, which can be washed into area waterways. This can
adversely affect turbidity, temperature, oxygen levels, and other important water quality
indicators. Increased development also increases the amount of impermeable surfaces,
potentially increasing runoff and decreasing groundwater recharge.
Atascadero Creek is in close proximity to the project site, approximately 200 feet away. No
drainages or waterways exist on the project site.
Groundwater. Currently the City derives all of its domestic water from groundwater resources.
Supply. All properties within the City are entitled to water from the Atascadero Mutual Water
Company (AMWC). AMWC obtains groundwater from a combination of shallow and deep wells
3-66
CITY OF A TASCADERO
INITIAL STUDY
Less Than
Potentially
Significant
Less Than
No
Initial Study 2006-0038
Significant
Impact
with
Mitigation
Significant
Impact
Impact
City Hall Repair and Rehabilitation Project
Incorporation
c) Substantially alter the existing drainage pattern of the site
or area, including through the alteration of the course of a
stream or river, in a manner which would result in
substantial erosion or siltation on- or off-site?
d) Substantially alter the existing drainage pattern of the site
or area, including through the alteration of the course of a
stream or river, or substantially increase the rate or amount
of surface runoff in a manner that would result in flooding
on- or off-site?
e) Create or contribute runoff water which would exceed the
capacity of existing or planned stormwater drainage systems
or provide substantial additional sources of polluted runoff?
f) Otherwise substantially degrade water quality?
n
Z
g) Place housing within a 100 -year flood hazard area as
mapped on a federal Flood Hazard Boundary or Flood
Insurance Rate Map or other flood hazard delineation map?
h) Place within a 100 -year flood hazard area structures that
11
El
would impede or redirect flood flows?
i) Expose people or structures to a significant risk of loss,
injury or death involving flooding, including flooding as a
result of the failure of a levee or dam?
j) Inundation by seiche, tsunami, or mudflow?
1-1
❑
SOURCES: Project description, Flood Insurance Rate Map 060700 0003 B (1/20/82); Site Visit
Setting
Natural drainage courses within the City include Atascadero, Graves and Paloma Creeks, and
the Salinas River. Water quality in the creeks and groundwater basin is affected by surface
drainage and pollution. Construction in the areas that directly or indirectly drain to waterways
results in disturbance of surface soils, which can be washed into area waterways. This can
adversely affect turbidity, temperature, oxygen levels, and other important water quality
indicators. Increased development also increases the amount of impermeable surfaces,
potentially increasing runoff and decreasing groundwater recharge.
Atascadero Creek is in close proximity to the project site, approximately 200 feet away. No
drainages or waterways exist on the project site.
Groundwater. Currently the City derives all of its domestic water from groundwater resources.
Supply. All properties within the City are entitled to water from the Atascadero Mutual Water
Company (AMWC). AMWC obtains groundwater from a combination of shallow and deep wells
3-66
CITY OF ATASCADERO
INITIAL STUDY
that tap into the Paso Robles Formation, which extends from Atascadero northward to the
county line and eastward toward Shandon.
Drainage/Flooding Problems. Portions of the City and outlying areas are within the 100 -year
flood hazard, as defined by local Flood Insurance Rate Maps. The flood hazard area associated
with the Salinas River extends to the east side of Hidalgo Avenue, Sycamore Road, and
Capistrano Avenue, as well as a segment of Curbaril Avenue. The flood hazard area associated
with Atascadero Creek is generally limited to its channel and immediately adjacent properties,
except where the creek crosses Highway 101. Flooding along Paloma and Graves Creek is
generally contained to areas within and immediately adjacent to the channels.
Answers to Checklist Questions:
Question A:
Implementation of the proposed repair and rehabilitation project would not significantly affect
water quality standards or waste discharge requirements. The proposed project would be
implemented in an urban area and would not result in any substantial changes to existing
drainage patterns or measurable changes in the rate and amount of surface runoff.
Furthermore, no substantial amounts of exposed soils or other hazardous construction materials
or wastes would be used during construction activity. Operation of the repaired City Hall, would
return the pre -project conditions and would not result in violations of water quality standards or
waste discharge requirements. Consequently, water quality impacts are considered to be less
than significant.
Questions B and F:
Neither construction activities nor City Hall operational activities would substantially deplete
water supplies or affect nearby wells. Groundwater quantity and quality impacts are considered
to be less than significant.
Questions C, D, and E:
The proposed project would not substantially alter existing drainage patterns on the site or the
surrounding area and would continue to use the stormwater drainage system developed for the
surrounding streets. Consequently, the project would not significantly change absorption rates,
drainage patterns, or the rate and amount of surface runoff during project construction or
operations.
Questions G -J:
The project would not place housing within a 100 -year flood hazard area. No new structures
would be built that would impede or redirect flood flows. The project would not expose persons
to flooding risks. Consequently, flooding impacts are considered to be less than significant. The
project site is not subject to inundation by a seiche, tsunami, or mudflow.
3-67
CITY OF ATASCADERO
INITIAL STUDY
Finding
The proposed project would have a less than significant impact on hydrology/water quality;
therefore, no mitigation is required.
Less Than
Potentially Significant Less Than
Significant with Significant No
Initial Study 2006-0038 Impact Mitigation Impact Impact
City Hall Repair and Rehabilitation Project Incorporation
3.9. LAND USE AND PLANNING - Would the project:
a) Physically divide an established community?
❑
❑
❑
b) Conflict with any applicable land use plan, policy, or
regulation
❑
❑
of an agency with jurisdiction over the project
(including, but not limited to the general plan, specific plan,
local coastal program, or zoning ordinance) adopted for the
purpose of avoiding or mitigating an environmental effect?
c) Conflict with any applicable habitat conservation plan or
natural community conservation plan?
❑
❑
❑
SOURCES: Land Use Element, Circulation Element, Project Description
Setting
U.S. Highway 101 provides the primary access to the City from points north and south. Highway
41 provides access east and west to the foothills and the coast, respectively. According to the
2000 U.S. census data, the current population is 26,411, making it the second most populous
city in the County. The population is concentrated within the urban areas; outlying areas are
more sparsely populated. According to the City's General Plan, this site is currently designated
Downtown (D). The site is zoned Downtown Commercial (DC).
Answers to Checklist Questions
Question A:
Implementation of the proposed project will not physically divide an established community. The
civic land use in the proposed location is consistent and compatible with adjacent commercial
and residential land uses.
Question B:
Because the project involves restoration of the existing City Hall, there would be no conflicts with
applicable land use plans, policies, or ordinances. No major modifications to the building would
be made that would create inconsistencies, pertaining to size or character, with applicable rules
and regulations contained in the City's General Plan and Zoning Code.
3-68
CITY OF ATASCADERO
INITIAL STUDY
Question C:
The project will not conflict with any habitat conservation plan or natural community conservation
plan.
Finding
The proposed project would not result in impacts to land use.
SOURCES: Project Description; site visit
Setting
The project site is not located in an area of mineral resource development.
Answers to Checklist Questions:
Questions A and B:
No mining is proposed as a part of this project. No known mineral resources have been
identified in the area; therefore, there will be no impacts to mineral resources.
Finding
There would be no impacts to mineral resources.
3-69
Less Than
Potentially
Significant
Less Than
No
Initial Study 2006-0038
Significant
Impact
with
Mitigation
Significant
Impact
Impact
City Hall Repair and Rehabilitation Project
Incorporation
3.10. MINERAL RESOURCES -- Would the project:
a) Result in the loss of availability of a known mineral
❑
resource that would be of value to the region and the
residents of the state?
b) Result in the loss of availability of a locally -important
❑
mineral resource recovery site delineated on a local general
plan, specific plan or other land use plan?
SOURCES: Project Description; site visit
Setting
The project site is not located in an area of mineral resource development.
Answers to Checklist Questions:
Questions A and B:
No mining is proposed as a part of this project. No known mineral resources have been
identified in the area; therefore, there will be no impacts to mineral resources.
Finding
There would be no impacts to mineral resources.
3-69
rte':
CITY OF ATASCADERO
INITIAL STUDY
Less Than
Potentially
Significant
Less Than
No
Initial Study 2006-0038
Significant
Impact
with
Mitigation
Significant
Impact
Impact
City Hall Repair and Rehabilitation Project
Incorporation
3.11. NOISE -- Would the project result in:
a) Exposure of persons to or generation of noise levels in
excess of standards established in the local general plan or
noise ordinance, or applicable standards of other agencies?
b) Exposure of persons to or generation of excessive
ground -borne vibration or ground -borne noise levels?
c) A substantial permanent increase in ambient noise levels
Elin
the project vicinity above levels existing without the
project?
d) A substantial temporary or periodic increase in ambient
❑
❑
noise levels in the project vicinity above levels existing
without the project?
e) For a project located within an airport land use plan or,
❑
where such a plan has not been adopted, within two miles of
a public airport or public use airport, would the project
expose people residing or working in the project area to
excessive noise levels?
f) For a project within the vicinity of a private airstrip, would
El
❑
the project expose people living or working in the project
area to excessive noise levels?
SOURCES: Project description, Noise Element, Noise Ordinance
Setting
General Information on Noise. Noise is generally defined as unwanted or objectionable
sound. Decibels and other technical terms are defined in Table 3.11-1. Noise levels are
measured on a logarithmic scale because of physical characteristics of sound transmission and
reception. Noise energy is typically reported in units of decibels (dB). Noise levels diminish (or
attenuate) as distance to the source increases according to the inverse square rule, but the rate
constant varies with type of sound source. Sound attenuation from point sources, such as
industrial facilities, is about 6 dB per doubling of distance. Heavily traveled roads with few gaps
in traffic behave as continuous line sources and attenuate at 3 dB per doubling of distance.
Noise from more lightly traveled roads is attenuated at 4.5 dB per doubling of distance.
3-70
Table 3.11-1
Definitions of Acoustical Terms
CITY OF ATASCADERO
INITIAL STUDY
Term
Definitions
Decibel, DB
A unit describing the amplitude of sound, equal to 20 times the logarithm to
the base 10 of the ratio of the sample sound pressure to the standard sound
pressure, which is 20 micropascals (20 micronewtons per square meter)
Frequency, Hz
The number of complete pressure fluctuations per second above and below
atmospheric pressure
A -Weighted Sound Level,
The sound pressure level in decibels as measured on a sound level meter
dB
using the A -weighting filter network. The A -weighting filter de-emphasizes
the very low and very high frequency components of the sound in a manner
similar to the frequency response of the human ear, and correlates well with
subjective reactions to noise. All sound levels in this reports are A -weighted
Equivalent Noise Level, Leq
The average A -weighted noise level during the measurement period
Community Noise
The average A -weighted noise level during a 24-hour day, obtained after
Equivalent Level, CNEL
addition of 5 decibels in the evening from 7:00 P.M. to 10:00 P.M. and after
addition of 10 decibels to sound levels in the night between 10:00 P.M. and
7:00 A.M.
Day/Night Noise Level, Ldp
The average A -weighted noise level during a 24-hour day, obtained after
addition of 10 decibels to levels measured in the night between 10:00 P.M.
and 7:00 A.M.
Ambient Noise Level
The composite of noise from all sources near and far. The normal or existing
level of environmental noise at a given location
Intrusive
That noise which intrudes over and above the existing ambient noise at a
given location. The relative intrusiveness of a sound depends upon its
amplitude, duration, frequency, time of occurrence, tonal or information
content, as well as the prevailing ambient noise level
Community noise levels are measured in terms of the A -weighted decibel (dBA). A -weighting is
a frequency correction that correlates overall sound pressure levels with the frequency response
of the human ear. Equivalent noise level (Leq) is the average noise level on an energy basis for
a specific time period. The duration of noise and the time of day at which it occurs are important
factors in determining the impact on communities. Noise is more disturbing at night and noise
indices have been developed to account for the time of day and duration of noise generation.
The Community Noise Equivalent (CNEL) and Day Night Average Level (DNL or Ldp) are such
indices. These indices are time -weighted average values equal to the amount of acoustic
energy equivalent to a time -varying sound over a 24-hour period. The CNEL index penalizes
night-time noise (10 p.m. to 7 a.m.) by adding 5 dB to account for increased sensitivity of the
community after dark. The Ldn index penalizes night-time noise the same as the CNEL index,
but does not penalize evening noise.
Effects of Noise. People are subject to a multitude of sounds in the environment. Excessive
noise cannot only be undesirable but may also cause physical and/or psychological damage.
The amount of annoyance or damage caused by noise is dependent primarily upon three
3-71
CITY OF ATASCADERO
INITIAL STUDY
factors: the amount and nature of the noise, the amount of ambient noise present before the
intruding noise, and the activity of the person working or living in the noise source area.
The difficulty in relating noise exposure to public health and welfare is one of the major
obstacles in determining appropriate maximum noise levels. Although there has been some
dispute in the scientific community regarding the detrimental effects of noise, a number of
general conclusions have been reached:
• Noise of sufficient intensity can cause irreversible hearing damage;
• Noise can produce physiological changes in humans and animals;
• Noise can interfere with speech and other communication; and,
• Noise can be a major source of annoyance by disturbing sleep, rest, and relaxation.
Existing Noise Environment
All streets surrounding the project site are two-lane with slow traffic speeds. With the exception
of some occasional commercial light -truck traffic, no significant mobile noise sources are present
in the vicinity. Sensitive noise -receptors exist on all sides of the project site. They include some
residences, small commercial businesses, Sunken Gardens, and Atascadero Junior High
School.
The California Department of Transportation (Caltrans) Technical Noise Supplement provides
some general guidelines for determining community noise impacts:
• A three -dB change is barely perceptible and is the minimum most people will notice in
most environments;
• A five -dB change is a readily perceptible increase per decrease in sound level; and,
• A ten -dB increase in sound level is perceived as an approximate doubling of the
loudness of the sound and represents a substantial change in loudness.
Answers to Checklist Questions
Questions A -C:
The primary source of noise affecting noise -sensitive receptors in the project vicinity would be
from construction activity. These impacts would be temporary in nature and limited to daytime
hours. Once repair activities have been completed, the noise environment would return to
existing levels. As such, impacts to noise levels in the project vicinity would be less than
significant.
3-72
Question D:
CITY OF ATASCADERO
INITIAL STUDY
Construction of the proposed project could result in short-term noise impacts to nearby
residences, persons at Sunken Gardens, and students at Atascadero Junior High School.
Questions E -F:
The project is not located within an airport land use plan or private airstrip.
Mitigation
Mitigation Measure N0I-1: All construction activities shall comply with the City of Atascadero
Noise Ordinance for hours of operation. The hours of construction may be modified by the
Community Development Director upon a determination that unusually loud construction
activities are having a significant impact on the neighbors, such as the Atascadero Junior High
School.
Finding
With the incorporation of mitigation, the proposed project would result in less than significant
impacts to noise.
Less Than
Potentially Significant Less Than No
Significant with Significant Impact
Initial Study 2006-0038 Impact Mitigation Impact p
City Hall Repair and Rehabilitation Project Incorporation
13.12. POPULATION AND HOUSING -- Would the project:
a) Induce substantial population growth in an area, either
El
M
directly (for example, by proposing new homes and
businesses) or indirectly (for example, through extension of
roads or other infrastructure)?
b) Displace substantial numbers of existing housing,
El
L1
M
necessitating the construction of replacement housing
elsewhere?
c) Displace substantial numbers of people, necessitating the
El
El
M
construction of replacement housing elsewhere?
SOURCES: Project description, General Plan Land Use Element
Setting
The population of Atascadero grew 14.1% during the 1990s, with the majority of that increase
occurring in the second half of the decade. The City is expected to continue to grow at roughly
the same rate until at least 2010.
3-73
Answers to Checklist Questions
Questions A -C:
CITY OF ATASCADERO
INITIAL STUDY
The land use of the site is designated Downtown (D) according to the City's General Plan. The
project would not result in the construction of new homes or businesses, nor does. it propose to
add additional infrastructure to the City. No displacement of existing housing or residents would
occur with implementation of the project.
Finding
The proposed project would not result in impacts to Population/Housing; therefore, no mitigation
is required.
Fire protection?
Police protection?
Schools?
Parks?
Other public facilities?
SOURCES: Project description, Land Use Element EIR.
Setting
Less Than
Significant No
Impact
Impact
❑
Less Than
❑
Potentially Significant
Initial Study 2006-0038
Significant with
City Hall Repair and Rehabilitation Project
Impact Mitigation
Incorporation
3.13. PUBLIC SERVICES
❑
a) Would the project result in substantial adverse physical
❑
impacts associated with the provision of new or physically
❑
altered governmental facilities, need for new or physically
altered governmental facilities, the construction of which
could cause significant environmental impacts, in order to
maintain acceptable service ratios, response times or other
performance objectives for any of the public services:
Fire protection?
Police protection?
Schools?
Parks?
Other public facilities?
SOURCES: Project description, Land Use Element EIR.
Setting
Less Than
Significant No
Impact
Impact
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
❑
1-1
The City provides police protection, fire protection, and numerous other general government
functions. Schools are operated by the Atascadero Unified School District.
3-74
'i
*0V17
Fire Protection
CITY OF ATASCADERO
INITIAL STUDY
The City of Atascadero Fire Department operates two fire stations located at 6005 Lewis Avenue
and 9801 West Front Road. The fire department staffs 17 full-time and 24 reserve staff, who
provide structural and wildland fire protection, emergency medical service and fire prevention to
the public. The fire department currently has a reflex (or response) time of six minutes over 60%
of the City, and eight minutes over 82% of the City. The fire department's goal is to have a six -
minute reflex time over 90% of the City, and an eight -minute reflex time over 95% of the City for
fire response and emergency medical care. The City has automatic aid agreements with the
California Department of Forestry and Fire Protection (CDF)/County of San Luis Obispo Fire
Department. They also have Mutual Aid Agreements with all fire departments in the County
through the San Luis Obispo County Fire Services Mutual Aid Plan.
Police Protection
The Police Station is located at the corner of EI Camino Real and Rosario Avenue. Currently,
the City employs approximately 30 sworn officers or about 1.2 officers per 1,000 people. The
Police Chief has indicated that 1.4 officers per 1,000 people are preferred. In addition to sworn
officers, a number of support staff including clerks and dispatchers is needed for the efficient
operation of the department. These staff are collectively known as support services technicians
(SST). Currently, the Police Department employs about eight SST and one support services
supervisor.
Schools
Public schools are governed by the Atascadero Unified School District, which covers a large
area from the City eastward to the County line. The district has five elementary schools, one
junior high school, one comprehensive high school, four alternative or academy schools and one
continuation school. The junior and senior high schools also serve the unincorporated
communities of Santa Margarita, Creston, and the Carrisa Plains. The Atascadero Fine Arts
Academy, the Santa Rosa Academic Academy, and the West Mall Alternative school serve
students interested in fine arts, accelerated learning, and home schooling, respectively.
Answers to Checklist Questions:
Question A:
Proposition 40 funds (see Section 2.0) would be used to help fund the project in part for the
purposes of public safety improvements at a public facility. The project would not result in
additional population; therefore no school fees to fund the Atascadero Unified School District
would be issued. The project would not increase the demand for other public services, including
fire protection, police protection, libraries, and parks.
Finding
The proposed project would result in no impacts to public services and no mitigation is required.
3-75
.� CITY OF ATASCADERO
INITIAL STUDY
Less Than
Potentially Significant Less Than
Significant with Significant No
Initial Study 2006-0038 Impact Mitigation Impact Impact
City Hall Repair and Rehabilitation Project Incorporation
3.14. RECREATION --
a) Would the project increase the use of existing ❑ ❑ ® El
and regional parks or other recreational
facilities such that substantial physical deterioration of the
facility would occur or be accelerated?
b) Does the project include recreational facilities or require ❑ ❑
the construction or expansion of recreational facilities that
might have an adverse physical effect on the environment?
SOURCES: Project description, Parks and Recreation Element
This section addresses the existing parks and recreation conditions of the project area. This
section also addresses the impacts from the proposed project. Impacts to parks and recreation
associated with the project were based on a review of existing literature and the proposed
project.
Environmental Setting
The City of Atascadero currently has over 95 acres of parks available for public use. With a
population of approximately 26,400, there are 3.6 acres of parks for every 1,000 individuals.
This includes the Atascadero Lake Park, the Atascadero Zoo, Heilmann Park, George C. Beatie
Skate Park, Paloma Creek Park, Sunken Gardens, and Traffic Way Park. These facilities offer a
wide variety of activities from hiking trails and tennis courts, to fishing, swimming, and boating.
Sunken Gardens is an existing public recreational facility located adjacent to the project site.
Answers to Checklist Questions:
Question A:
The nature of the proposed project does not directly lend itself to increased use of the nearby
Sunken Gardens. Construction activities at the City Hall may temporarily degrade the use and
enjoyment of the Park related primarily to noise intrusion; however, these impacts would be
short-term in nature. There would be no long -terms effects on the Park resulting from the
project.
Question B:
The proposed project does not include new recreational facilities, or require the construction or
expansion or recreational facilities that might have an adverse physical effect on the
environment.
3-76
Finding
CITY OF ATASCADERO
INITIAL STUDY
The proposed project will results in only temporary impacts to recreation, which would be less
than significant; no mitigation is required.
Less Than
Potentially Significant Less Than No
Significant with Significant Impact
Initial Study 2006-0038 Impact Mitigation Impact p
City Hall Repair and Rehabilitation Project Incorporation
3.15. TRANSPORTATIONITRAFFIC -- Would the project:
a) Cause an increase in traffic that is substantial in relation
®
El
the existing traffic load and capacity of the street system
(i.e., result in a substantial increase in either the number of
vehicle trips, the volume to capacity ratio on roads, or
congestion at intersections)?
b) Exceed, either individually or cumulatively, a level of
service standard established by the county congestion
management agency for designated roads or highways?
c) Result in a change in air traffic patterns, including either
an increase in traffic levels or a change in location that
results in substantial safety risks?
d) Substantially increase hazards due to a design feature
El
0
11
N
(e.g., sharp curves or dangerous intersections) or
incompatible uses (e.g., farm equipment)?
e) Result in inadequate emergency access?
El
❑
f) Result in inadequate parking capacity?
❑
❑
❑
g) Conflict with adopted policies, plans, or programs
supporting alternative transportation (e.g., bus turnouts,
bicycle racks)?
SOURCES: Land Use Element, Circulation Element
Environmental Setting
Laid out as part of the 1913 Atascadero Colony plan, the circulation system was designed for
low -intensity. uses. The existing network consists of radial routes emanating from the City Hall
area supported by a series of arterial rings meant to convey traffic to outlying areas. A few
blocks in the city center display the grid system common to most cities. Not all planned streets
have been built, and many minor streets are privately maintained and are not part of the City's
adopted system.
The radial street pattern was interrupted in 1954 with construction of Highway 101. Commercial
development has since spread along EI Camino Real. The freeway has limited east -west travel
to the eight crossings and does not allow for access from Atascadero Mall to EI Camino Real
and the downtown area.
3-77
CITY OF ATASCADERO
INITIAL STUDY
The Circulation Element classifies roadways based on their intended function and projected
traffic levels, which determines the appropriate type of design and number of lanes for the route.
Table 3.15-1 describes the different types of roads:
Table 3.15-1 Roadway Classifications
Type
Description
Freeway
High speed; high capacity limited access facilities serving intercity and regional
travel. Example: US 101
Arterials
Provide for circulation between major activity centers and residential areas in the
City and beyond; provide access to freeways
Major arterials are high-capacity, moderately high-speed routes, typically two or
four lanes wide
Minor arterials interconnect with and augment the major arterial system, and serve
trips of moderate length
Collectors
Channel traffic from residential or commercial areas to arterials. Further classified
as urban, rural, or hillside, depending upon the area and type of topography and
vegetation
Local Streets
Provide access to adjoining land uses
Existing Roadway System
Roadways that provide primary circulation in the vicinity of the project site include Traffic Way, EI
Camino Real, U.S. 101, and West/East Mall Road.
Traffic Way is a 2 -lane collector running east—west and serves the downtown area while
connecting eastern portions of the City to U.S. 101 and EI Camino Real.
EI Camino Real constitutes the principal north -south arterial that serves the downtown and
residences to the north and south of the downtown area. EI Camino Real is primarily a four -lane
major arterial (from San Rafael Road to San Anselmo Road) that is east of and adjacent to U.S.
101. Many of Atascadero's commercial and retail land uses are found along this corridor.
U.S. 101 is a major freeway facility that serves regional and inter -regional north -south travel
within and throughout the City of Atascadero. U.S. 101 is a four -lane divided freeway through
the City. According to Caltrans Traffic Volumes on the State Highway System (2002), U.S. 101
carries an average daily traffic (ADT) volume of approximately 40,500 vehicles within the vicinity
of the project.
West/East Mall Road, Lewis Avenue, and Palma Avenue are local streets which serve the
downtown grid and surround each side of the City Hall site.
3-78
Answers to Checklist Questions
Questions A -B:
CITY OF ATASCADERO
INITIAL STUDY
The street system around the project site is lightly traveled and generally free of congestion,
except for mornings and afternoons when students are dropped off and picked up from the
adjacent school. During the construction period, construction trips would occur generally in the
morning and end of the day as workers arrive to and leave the site. Other construction trips
would involve heavy duty trucks or trailer rigs dropping off building and other project materials.
Construction traffic may potentially interfere with school traffic peak hours (student drop-offs,
pick-ups and buses). To alleviate potential conflicts between vehicles and buses with students
arriving and departing the nearby Atascadero Junior High School and construction vehicles, a
traffic control plan would be implemented. This plan would be review and coordinated with the
school (see Mitigation TRA -1). Once project construction is completed, traffic levels would
return to pre -project conditions.
Question C:
No changes will occur to the air traffic patterns.
Question D:
The project will not substantially increase hazards due to a design feature or incompatible use.
Question E:
The project site will have adequate emergency access from the existing street network, West
and East Mall Road, Lewis Avenue and Palma Avenue.
Question F:
Existing on and off-street parking in the vicinity of City Hall would be utilized upon project
completion. Construction vehicles would be parked at a staging area along Palma Avenue (see
Mitigation Measure TRA -1). Additional equipment may be staged on the lawn areas surrounding
the building. Following construction, landscaping would be conducted.
Question G:
The project does not conflict with adopted policies, plans, or programs supporting alternative
transportation.
Mitigation
Mitigation Measures TRA -1: Traffic Control Plan. The City, in coordination with the Atascadero
Unified School District, shall develop and implement a traffic control plan to reduce construction -
related effects on the local street system. Construction vehicles, worker commute vehicles, and
equipment shall be staged on the section of Palma Avenue between East and West Mall Road
3-79
CITY OF ATASCADERO
INITIAL STUDY
in front of the entrance to City Hall and Sunken Gardens. This section of street shall be closed
to the public during periods of project construction. City guidelines for temporary road closures
shall be followed, including notification of nearby businesses of this closure. The Traffic Control
Plan shall ensure that access to these businesses is not substantially affected.
Finding
With the incorporation of mitigation, the proposed project will result in less than significant
impacts to transportation/circulation.
Water
Currently the City derives all of its domestic water from groundwater resources. All properties
within the City are entitled to water from the Atascadero Mutual Water Company (AMWC).
AMWC obtains groundwater from a combination of shallow and deep wells that tap into the Paso
:M
Less Than
Potentially
Significant
Less Than
No
Initial Study 2006-0038
Significant
Impact
with
Mitigation
Significant
Impact
Impact
City Hall Repair and Rehabilitation Project
Incorporation
3.16. UTILITIES AND SERVICE SYSTEMS --Would the
project:
a) Exceed wastewater treatment requirements of the
applicable Regional Water
❑
❑
Quality Control Board?
b) Require or result in the construction of new water or
wastewater treatment facilities
❑
❑
or expansion of existing
facilities, the construction of which could cause significant
environmental effects?
c) Require or result in the construction of new storm water
facilities
❑
Eldrainage
or expansion of existing facilities, the
construction of which could cause significant environmental
effects?
d) Have sufficient water supplies available to serve the
from
❑
❑
project existing entitlements and resources, or are new
or expanded entitlements needed?
e) Result in a determination by the wastewater treatment
that
❑
❑
provider serves or may serve the project that it has
adequate capacity to serve the project's projected demand
in addition to the provider's existing commitments?
f) Be served by a landfill with sufficient permitted capacity to
accommodate the
❑
❑
project's solid waste disposal needs?
g) Comply with federal, state, and local statutes and
to
❑
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El
related solid waste?
SOURCES: Project description, Land Use Element (LUE) EIR;
Project Plans.
Setting
Water
Currently the City derives all of its domestic water from groundwater resources. All properties
within the City are entitled to water from the Atascadero Mutual Water Company (AMWC).
AMWC obtains groundwater from a combination of shallow and deep wells that tap into the Paso
:M
CITY OF ATASCADERO
INITIAL STUDY
Robles Formation, which extends from Atascadero northward to the county line and eastward
toward Shandon.
Sewage Treatment
The City collects, treats, and disposes of sewage from development within the Urban Services
Line. In 2000, the City provided sewage service to 4,3223 connections. The treatment plant has
an average capacity of about 2.39 million gallons per day (mgd) in dry weather and 4.3 mgd in
wet weather. Currently, the average dry weather flow is about 1.2 mgd (50% capacity). The
year average is 3.1 mgd, including wet weather flows. Over the past thirteen years, flows to the
plant have increased by approximately 0.02 mgd/yr. At this rate, it would take approximately 54
years for the plant to reach capacity.
Solid Waste Disposal
A private vendor, Wil -Mar Disposal, collects solid waste under a franchise agreement with the
City. Participation in garbage collection is mandatory citywide and rates are based on volume as
part of a comprehensive effort to comply with current state law for waste reduction. The Chicago
Grade landfill serving Atascadero is also used by the unincorporated communities of Santa
Margarita and Templeton, and has an expected remaining life of about 16 years (Source:
Chicago Grade Landfill, Site Life Calculation, December 20, 2001). Additional landfill capacity
would be required to extend beyond the current permitted disposal area.
Answers to Checklist Questions
Questions A -B, E:
The project will not require the construction of new wastewater treatment facilities or the
expansion of existing ones, nor would it cause the exceedance of treatment requirements of the
applicable Regional Water Quality Control Board. Sewer discharge will be handled by a City
sewer connection upon re -opening of the City Hall.
Question C:
The project will not require the construction of new storm drainage facilities.
Question D:
The Atascadero Mutual Water Company (AMWC) will provide water to the project upon
completion. All property within the City limits is entitled to water from the AMWC. The project is
not expected to require significant quantities of water for the proposed uses.
Questions F -G:
Solid waste from construction activities, including removal of existing materials, such as
masonry, brick and mortar from the damaged City Hall, would be disposed of at the local
Chicago Grade Landfill. Other wastes would include miscellaneous construction materials left
Mi
CITY OF ATASCADERO
INITIAL STUDY
over after repairs. Disposal of solid waste would be in compliance with federal, state, and local
statutes and regulations.
Mitigation
No mitigation measures are necessary.
Finding
The project would result in less than significant impacts to public services and utilities.
Less Than
Potentially Significant Less Than No
Significant with Significant
Initial Study 2006-0038 Impact Mitigation Impact Impact
City Hall Repair and Rehabilitation Project Incorporation
3.17. MANDATORY FINDINGS OF SIGNIFICANCE --
a) Does the project have the potential to degrade the quality
® ❑ ❑
of the environment, substantially reduce the habitat of a fish
or wildlife species, cause a fish or wildlife population to drop
below self-sustaining levels, threaten to eliminate a plant or
animal community, reduce the number or restrict the range
of a rare or endangered plant or animal or eliminate
important examples of the major periods of California history
or prehistory?
b) Does the project have impacts that are individually
® ❑
limited, but cumulatively considerable? ("Cumulatively
considerable" means that the incremental effects of a
project are considerable when viewed in connection with the
effects of past projects, the effects of other current projects,
and the effects of probable future projects)?
c) Does the project have environmental effects that will
® ❑ ❑
cause substantial adverse effects on human beings, either
directly or indirectly?
Discussion
The project consists of a series of actions for the repair, maintenance, and rehabilitation of
Atascadero's City Hall. The project would occur in three phases. Funding for each phase of
the project is derived from separate sources. Funding for the first phase of the project would
come from a State grant.
The first phase of the project addresses specific items as delineated by a team of
architectural and engineering consultants retained by the City of Atascadero. The items fall
within seven major categories of work, as follows:
• Exterior cladding;
• Roofing, waterproofing, and skylights;
• Interior partitions, doors, and glazing;
r
CITY OF ATASCADERO
INITIAL STUDY
• Floor and roof structure repairs
• Heating, ventilation, and air conditioning repairs; and,
• Electrical lighting, power, and communication repairs.
Answers to Checklist Questions
Questions A -C:
The project has potential to degrade the quality of the environment and have environmental
effects that would cause substantial adverse effects on human beings; however, mitigation
measures have been proposed to minimize impacts to a level of less than significant.
Finding
With the incorporation of mitigation, the project would result in less than significant impacts.
Sources
• California Air Resources Board website. Proposed 2006 State Area Designations
Map for PM,o. http://www.arb.ca.gov/desig/adm/adm.htm.
• California Cultural and Historical Endowment (California State Library) website.
Accessed October, 2006. www.library.ca.gov/CCHE/index.cfm#contact
• CEQA Handbook, Air Quality Control District, August 1995.
• Dibblee, J.W., Jr. 1976. The Rinconada Fault and related faults in southern Coast
Ranges, California and their tectonic significance. U.S. Geologic Survey
Professional Paper 981.
• Earthquake Engineering Research Institute. 2004. Special Earthquake Report —
March 2004. Preliminary Observations on the December 22, 2003 San Simeon
Earthquake.
• General Plan Safety Element. 2002. City of Atascadero.
• General Plan Circulation Element. 2002. City of Atascadero.
• General Plan Land Use Element, Land Use Map. 2002. City of Atascadero.
• General Plan Noise Element. 2002. City of Atascadero.
• Guide for Developers. 1998 (draft). Atascadero Fire Department.
3-83
CITY OF ATASCADERO
INITIAL STUDY
• Hall, C.A. Jr. 1976. Geologic map of the San Simeon -Piedras Blancas region, San
Luis Obispo County, California: U.S. Geologic Survey Map MF -784. scale:
1:24,000.
• Hart, E.W. 1976. Basic Geology of the Santa Margarita, San Luis Obispo County,
California.
• Crawford, Multari, and Clark. Land Use Element Environmental Impact Report,
adopted 2002.
• Noise Ordinance. 1992. City of Atascadero.
• Pacific Gas and Electric (PG&E). Final report of the Diablo Canyon long term seismic
program, U. S. Nuclear Regulatory Commission, Docket 50-275 and 50-323, San
Francisco, California. 1988.
• Peterson, M.D. et al. Fault slip rates and earthquake histories for active faults in
Southern California. 1994.
• Youd, T. L., and Idriss, I.M. Liquefaction Resistance of Soils: Summary Report from
the 1996 and 1998 NCEER/NSF Workshops on Evaluation of Liquefaction of
Soils, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 127, No.
4, 2001.
• Zoning Ordinance, part of Municipal Code, City of Atascadero, as amended through
1999.
Project -Specific Sources
Anderson, R. B., Hardy, T. R. 2006. Review and Evaluation of Significance of
Impacts: Repair and Rehabilitation of Atascadero City Hall.
• Davey Resource Group, Arborist Report and Tree Protection Plan, May 2010
• Project personal communication with Mr. Steve McHarris, Deputy Community
Development Director, City of Atascadero.
• Pfeiffer Partners. 2005. Atascadero City Hall Damage Assessment and
Rehabilitation Plan. Prepared for the City of Atascadero.
• Earth Systems Pacific. 2004. Soils Engineering Report, Atascadero City Hall Seismic
Repair/Retrofit, Atascadero, California. Prepared for the City of Atascadero.
R
CITY OF ATASCADERO
INI TIAI STl m v
Appendix A
Timing
Responsibility
Mitigation
Mitigation Monitoring Program
/Monitoring
Measure
Atascadero City Hall Repair and Rehabilitation Project
GP: Grading Permit
PS: Planning Services
BS: Building Services
BP: Building Pemdt
TO: Temporary
FD: Fire Department
PD: Police Department
Occupancy
FI: Final inspection
CE: City Engineer
WW: Wastewater
FO: Final Occupancy
CA: City Attorney
AMWC: Water Comp.
Mitigation Measure A-1. The site shall be relandscaped
BP, FO
Ps
A-1
upon completion of construction in order to mitigate the
visual impacts of the tree removals A landscape plan
prepared by a qualified landscape professional shall be
submitted with building permits for approval The
Atascadero Historical society shall be consulted when
choosing the plant material for the new landscape
Mitigation Measure AQ -1. Prior to construction, the
BP, FI
PS, BS, CE
AQ -1
contractor shall prepare and submit for approval, a
health and safety plan for addressing asbestos issues.
If asbestos is present, then the APCD may require
preparation of an Asbestos Health and Safety Program
and dust mitigation measures under guidance of the
National Emission Standards for Hazardous Air
Pollutants (NESHAP). The APCD has the local
responsibility to regulate material containing more than
1 percent asbestos; therefore the City shall hire a
licensed asbestos abatement contractor if asbestos is
known to be present. Mitigation measures would
include stabilization of debris by wetting and covering
with plastic sheeting until they are removed.
Furthermore, the contractor hired to perform clean-up
shall submit an asbestos notification form to the APCD.
Mitigation Measure AQ -2. During construction, the
BP, F1
PS, BS, CE
AQ -2
contractor shall employ a qualified, independent testing
lab to conduct field sampling and lab testing of paint for
detection of lead. This will include removing paint
samples from the building and testing for lead content.
A report shall be prepared indicating areas of detected
lead and a Lead Work Plan shall be developed. If lead
is detected, all loose paint and particle that could
become airborne shall be scraped from the building
within an enclosed area covered with plastic sheeting to
prevent lead -containing particles from becoming
A-1
CITY OF ATASCADERO
INITIAL STUDY
Appendix A
Timng
Responsibility
!Monitoring
Mitigation
Measure
Mitigation Monitoring Program
PS: Planning Services
Atascadero City Hall Repair and Rehabilitation Project
GP: Grading Perrr9l
BS: Building Services
BP: Building Permt
TO: Temporary
FD: Fire Department
PD: Police Department
Occupancy
FI: Final inspection
CE: City Engineer
WW: Wastewater
FO: Final Occupancy
CA: City Attorney
AMWC: Water Comp.
airborne. With incorporation of mitigation, any potential
lead exposure to the public is considered a less than
significant impact.
GP, BP
PS
BR -1
Mitigation Measure BR -1. Nesting Birds: Within one
week of ground disturbance or tree removal/trimming
activities, if work occurs between March 15 and August
15, nesting bird surveys shall be conducted. If
construction activities must be conducted during this
period, nesting bird surveys shall take place within one
week of habitat disturbance. If surveys do not locate
nesting birds, construction activities may be conducted.
If nesting birds are located, no construction activities
shall occur within 100 feet of nests until chicks are
fledged. Construction activities shall observe a 300 -foot
buffer for active raptor nests.
Mitigation Measure CR -1. The two deodar cedar trees
GP, BP
PS
CR -1
on Palma Ave. shall be protected during construction.
All reasonable efforts to save these trees shall be made.
A tree protection plan shall be prepared by a certified
arborist and all required protection measures will be
installed and maintained throughout construction.
Mitigation Measure GEO-1. The City shall implement
BP
PS, BS, CE
GEO-1
the preliminary geotechnical recommendations
contained in the Soils Engineering Report (Appendix C)
and/or measures identified through subsequent
engineering design to minimize impacts to geology and
soils.
BP, FI
PS, BS, CE
HAZ-1
Mitigation Measure HAZ-1. Implement Mitigation
Measures AQ -1 and AQ -2.
BP
PS, BS, CE
N01-11
Mitigation Measure NOI-1. All construction activities
shall comply with the City of Atascadero Noise
Ordinance for hours of operation. The hours of
construction may be modified by. the Community
Development Director upon a determination that
unusually loud construction activities are having a
A-2
WIN
CITY OF ATASCADERO
INITIAL STUDY
Appendix A
pp
Mitigation Monitoring Program
Atascadero City Hall Repair and Rehabilitation Project
Timing
GP: Grading Permit
BP: Building Pemrl
TO: Temporary
Occupancy
FI: Final inspection
FO: Final Occupancy
Responsibility
/Monitoring
PS: Planning Services
BS: Building Services
FD: Fire Department
PD: Police Department
CE: City Engineer
WW: Wastewater
CA: City Attorney
AMWC: Water Comp.
Mitigation
Measure
significant impact on the neighbors, such as the
Atascadero Junior High School.
Mitigation Measures TRA -1: Traffic Control Plan. The
BP
PS, BS, CE
TRA -1
City, in coordination with the Atascadero Unified School
District, shall develop and implement a traffic control
plan to reduce construction -related effects on the local
street system. Construction vehicles, worker commute
vehicles, and equipment shall be staged on the section
of Palma Avenue between East and West Mall Road in
front of the entrance to City Hall and Sunken Gardens.
This section of street shall be closed to the public during
periods of project construction. City guidelines for
temporary road closures shall be followed, including
notification of nearby businesses of this closure. The
Traffic Control Plan shall ensure that access to these
businesses is not substantially affected.
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