Initial Study New Fleet Services Shops Project Project No. 100644

Transcription

Initial Study
New Fleet Services Shops Project
Project No. 100644
Imperial County, California
Imperial Irrigation District
333 East Barioni Blvd.
PO Box 937
Imperial, CA 92251
April 8, 2016.
Draft Initial Study and Environmental Checklist
INTRODUCTION
The purpose of this Initial Study is to provide a preliminary analysis that enables
the Imperial Irrigation District (IID) to determine whether an Environmental Impact
Report (EIR), Negative Declaration or a Mitigated Negative Declaration must be
prepared. The California Environmental Quality Act (CEQA) requires that an EIR
be prepared if a proposed project may result in one or more significant
environmental impacts. A Negative Declaration shall be prepared when the Initial
Study shows that either 1) " …there is no substantial evidence that the project
may have a significant effect on the environment, or 2) identifies potentially
significant effects but proposed revisions in the project plans… would avoid the
effects or mitigate the effects to a point where clearly no significant effects would
occur” (CEQA § 15070). A Mitigated Negative Declaration is prepared for a
project when the Initial Study has identified potentially significant effects on the
environment, but (1) revisions in the project plans or proposals made by, or
agreed to by, the applicant before the proposed Mitigated Negative Declaration
and Initial Study are released for public review, would avoid the effects or
mitigate the effects to the point where clearly no significant effect on the
environment would occur, and (2) there is no substantial evidence in light of the
whole record before the public agency that the project, as revised, may have a
significant effect on the environment.
NEED FOR PROJECT
The existing fleet shop was originally constructed in 1922 to house the mules
used to drag canals. As the IID’s operations and technology evolved, the mule
barn converted into the IID’s garage and it has served that purpose ever since.
However, as the years have passed, operational, regulatory and code
requirements became much more stringent and the IID’s ability to continue
working effectively in the same environment has become increasingly difficult.
Under current code requirements, a repair garage is an activity that is not
allowed within a wooden-framed building. Furthermore, the current fleet shop
lacks proper lighting and mechanical and electrical systems as well as an
automatic fire protection and alarm system. Due to building code deficiencies and
the wooden structure’s classification as a non-conforming building type, the IID is
unable to make the required improvements to the existing facility; thus
necessitating that the IID undertake the construction of a new facility to
adequately and efficiently support IID’s Fleet Services Section existing
operations.
PROJECT DESCRIPTION
The new Fleet Services Shops Project consists of the construction of a 76,590
sq. ft. facility to be located on a 5.2 acre site at the north-east corner of IID’s
Imperial Headquarters at 333 East Barioni Boulevard, Imperial, CA (Figures No.
1 and No. 2) to support IID Fleet Services Section’s existing operations which
consists of the acquisition, management, maintenance and disposal of more than
785 vehicles and other equipment units. This includes light duty passenger
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vehicles (under 1 ton), heavy equipment and off-road type vehicles and
generators.
The proposed facility will house Fleet Services’ current work areas: a machine
shop bay, welding bay, heavy equipment bay, auto shop bay, auto body shop,
paint booth and electric & A/C bay. Additionally the building will include
supervisor offices, storage rooms, equipment rooms; water, oil and new oil
containment areas, air compressor storage areas, common areas comprised of
restrooms and showers for men and women and an adjacent wash rack
equipped with sump, shade area and sand/grease interceptor (Figure No. 3).
The facility will be a pre-engineered metal building system with a 35 ft. eave
height, 4” standing seam insulated panel roof, 3” insulated wall panels above 8 ft.
high block walls at exterior of building and 26 gauge wall liner panel above block
at interior of building. Building improvements also include portal frame bracing,
structure for cranes, gutter and downspouts; curb mounted skylights with
collateral load for roof solar panels and a roof access ladder.
The building will be equipped with one (1) 10-ton crane and one (1) 5-ton crane
in the heavy equipment shop. One (1) 5-ton crane and one (1) 3-ton crane in the
welding shop. Two (2) 2-ton cranes in the machine shop. One (1) 1-ton crane in
the auto shop and one (1) 2-ton crane in the auto body shop. It will have parking
for staff and visitors and asphalt and concrete paved aprons to support heavy
equipment.
Tentatively, IID intends to break ground for construction in August 2016 and have
a fully functional building by March 2017.
The principal construction activities include but are not limited to:
1. Installation of a 6’ temporary construction fence around construction site
for safety and security reasons.
2. Set-up of a temporary construction modular office at work site.
3. Installation of temporary utilities such as electricity, lighting, and sanitary
facilities.
4. Demolition of existing concrete slabs and minor structures identified on the
plans and specifications.
5. Foundation construction.
6. Installation of pre-engineered metal building structure.
7. Installation of overhead cranes.
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8. Installation of a paint booth.
9. Installation of mechanical HVAC system, including vehicle and welding
exhaust ventilation systems.
10. Installation of electrical system including phone, network and fiber optic
lines.
11. Installation of plumbing system.
12. Installation of a fire suppression sprinkler system.
13. Installation of new asphalt/concrete paved areas for driveways and
parking.
PROJECT LOCATION
The project will be sited at the north-east corner (south of 15th Street and west of
M Street) of IID’s Imperial Headquarters located at 333 East Barioni Boulevard,
Imperial, CA 92251; APN 063-130-000, legal description: BLKS 4, 5, 6, 17, 18,
26, 28, 40, 41, 48, 49, 62 & 63 TSTE IMPERIAL, latitude-longitude coordinates:
32˚51’15.1”N, 115˚33’56.5”W (Figure No 1).
GENERAL PLAN DESIGNATION:
Under the Land Use Element of the City of Imperial General Plan the project site
is designated “Industrial”.
ZONING:
Under the City of Imperial’s current Zoning Map, the project will be located on
land zoned I-2 Rail Served Industrial which is compatible with the siting of the
new Fleet Services Shops project.
SURROUNDING LAND USES AND ENVIRONMENTAL SETTING:
Existing land uses in the immediate vicinity of the project site include 15th Street
and residential development to the north, M Street, Dolson Drain and open area
industrial land to the east and IID open industrial storage space to the south and
west.
PROJECT APPLICANT:
Imperial Irrigation District (IID)
LEAD AGENCY NAME AND ADDRESS:
333 East Barioni Boulevard
P. O. Box 937
Imperial, CA 92251
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CONTACT PERSON AND PHONE NUMBER:
Donald Vargas
Environmental Compliance Administrator
(760) 482-3609
[email protected]
OTHER PUBLIC AGENCIES WHOSE APPROVAL IS REQUIRED:
N/A. However, the resulting documentation from the environmental determination
will be submitted to the State Clearinghouse for circulation among the
appropriate public agencies. Furthermore, the City of Imperial and the County of
Imperial as responsible agencies will be provided with the environmental
documentation of the project for their review and comment.
OTHER ENVIRONMENTAL REVIEWS REFERENCED HEREIN:
N/A.
Environmental Factors Potentially Affected:
The environmental factors checked below could potentially be affected by this
project if not mitigated. As indicated by the checklist and the evaluation of
environmental impacts on the following pages, all potential impacts have been
mitigated and determined to be less than significant or no impact.
Aesthetics
Agricultural and Forest
Resources
Air Quality
Biological Resources
Cultural Resources
Geology/Soils
Greenhouse Gas
Emissions
Hazards and Hazardous
Materials
Hydrology/Water
Quality
Land Use/Planning
Mineral Resources
Noise
Population/Housing
Public Services
Recreation
Transportation/Traffic
Utilities/Service Systems
Mandatory
Findings of
Significance
Environmental Determination
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.
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X
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 revisions
to the project have been made by or agreed to by the applicant. 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 impact” or
“potentially significant unless mitigated” 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.
I find that although the proposed project could have a significant effect on the
environment, because all potentially significant effects (a) have been analyzed
adequately in an earlier EIR pursuant to applicable standards, and (b) have
been avoided or mitigated pursuant to that earlier EIR, including revisions or
mitigation measures that are imposed upon the project, nothing further is
required.
________________________________ ______________________________
Donald Vargas
Date
Environmental Compliance Administrator
Regulatory & Environmental Compliance
Section
Lead Agency
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ENVIRONMENTAL CHECKLIST
I. AESTHETICS - Would the project:
Potentially
Significant
Impact
Potentially
Less Than
No
Significant Significant Impact
Unless
Impact
Mitigation
Incorporated
a. Have a substantial adverse effect on a
scenic vista?
X
b. Substantially damage scenic resources,
including, but not limited to, trees, rock
outcroppings, and historic buildings within
a state scenic highway?
X
c. Substantially degrade the existing visual
character or quality of the site and its
surroundings?
X
d. Create a new source of substantial light or
glare, which would adversely affect day or
nighttime views in the area?
X
The new Fleet Services Shops project will be located within the grounds of the IID
headquarters in Imperial, CA and will be replacing existing facilities of similar nature, thus the
level of change to the project site’s landscape resulting from the undertaking of project will be
negligible and will not dominate the views of the casual observer. The proposed project site is
not located near any scenic vista or state scenic highway. No aspect of the project would
damage or degrade any existing scenic resources. The project does not create substantial light
or glare that could adversely affect day or nighttime views in the area. Thus, no impact is
identified for this issue and further discussion is not required.
The project will not result in changes in the viewshed given that industrial-type storage and fleet
services are currently performed at IID headquarters where the project will be sited. The project
entails replacing an existing building with a new construction to enhance IID Fleet Services’
operational support of the district’s mechanical and vehicular assets within an existing IID
facility amid a previously disturbed vista. A minor portion of the overall setting of the project site
will be altered but not to a level that would significantly impact or alter the current viewshed.
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II. AGRICULTURAL AND FOREST
RESOURCES - Would the project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Convert Prime Farmland, Unique
Farmland, or Farmland of Statewide
Importance (Farmland), as shown on the
maps prepared pursuant to the Farmland
Mapping and Monitoring Program of the
California Resources Agency, to nonagricultural use?
X
b. Conflict with existing zoning for agricultural
use, or a Williamson Act contract?
X
c. Conflict with existing zoning for, or cause
rezoning of, forest land (as defined in
Public Resources Code section 12220 (g))
or timberland (as defined in Public
Resources Code section 4526)?
X
d. Result in the loss of forest land or
conversion of forest land to non-forest
use?
X
e. Involve other changes in the existing
environment which, due to their location or
nature, could result in conversion of
Farmland, to non-agricultural use?
X
The project does not conflict with any existing agricultural or forest zoning nor impact
agricultural or forest resources. Under the Land Use Element of the City of Imperial’s General
Plan, the project site is designated “Industrial” and in accordance with the City’s Zoning Map,
the project will be located on land zoned I-2: Rail Served Industrial which does not prohibit the
siting of the project.
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III. AIR QUALITY - Would the project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Conflict with or obstruct implementation of
the applicable air quality plan?
X
b. Violate any air quality standard or
contribute substantially to an existing or
projected air quality violation?
X
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 which exceed quantitative
thresholds for ozone precursors)?
X
d. Expose sensitive receptors to substantial
pollutant concentrations?
X
e. Create objectionable odors affecting a
substantial number of people?
X
Given the small project footprint and the minimal ground disturbing construction activities
involved in the project (i.e. foundation construction), no significant impact to air quality is
anticipated. Furthermore the project would not emit any significant levels of pollutants after
construction is completed (no new stationary sources would be generated), and no conflicts
with the Imperial County Air Pollution Control District (ICAPCD) regulations are expected. The
operation of the new Fleet Services shops will not generate any new or unusual pollutants or
create or contribute to a net increase of any criteria pollutants. There appear to be few sensitive
receptors in the project area, and no objectionable odors would be produced. Per ICAPCD’s
standard requirements, a dust control plan will be developed and implemented for the
construction phase of the project.
In regards to the long-term operational impacts, given that in essence the proposed project
would result in the relocation of the existing fleet shops operations within the IID HQ: the new
fleet shops would continue to perform minor vehicle maintenance activities such as, but not
limited to oil, tire, battery and wiper blade changes, paint jobs, etc.; the proposed project would
not change the amount of operational emissions generated by the existing fleet shops.
Furthermore, it is important to note that the new Fleet Services shops will operate under the
existing facility’s current permits for stationary sources of air emissions in Imperial County,
revising them only in regards to the relocation of the shops and will comply with the rules and
regulations as stipulated in these permits including but not limited to ICAPCD, Certified Unified
Program Agencies, California Air Resource Board, etc.
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IV. BIOLOGICAL RESOURCES - Would the
project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
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?
X
b. Have a substantial adverse impact on any
riparian habitat or other sensitive natural
community identified in local or regional
plans, policies, regulations or by the
California Department of Fish and Game
or U.S. Fish and Wildlife Service?
X
c. Interfere substantially with the movement
of any resident or migratory fish or wildlife
species or with established resident or
migratory wildlife corridors, or impede the
use of wildlife nursery sites?
X
d. Conflict with any local policies or
ordinances protecting biological resources,
such as a tree preservation policy or
ordinance?
X
e. Conflict with the provisions of an adopted
Habitat Conservation Plan, Natural
Communities Conservation Plan, or other
approved local, regional, or state habitat
conservation plan?
X
No federal or state special-status plant or wildlife species were observed within or in the
proximity of the project site. The activities that define the project do not affect riparian habitat.
The project does not conflict with any policy protecting biological resources or any habitat
conservation plan. Consequently, the proposed project would not have any impact on biological
resources. The project will be undertaken on previously disturbed land.
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V. CULTURAL RESOURCES - Would the
project:
Potentially
Significant
Impact
Potentially
Significant
Less Than
No
Unless
Significant Impact
Mitigation
Impact
Incorporated
a. Cause a substantial adverse change in the
significance of a historical resource as
defined in §15064.5?
X
b. Cause a substantial adverse change in the
significance of an archaeological resource
pursuant to §15064.5?
X
c. Directly or indirectly destroy a unique
paleontological resource or site or unique
geologic feature?
d. Cause a substantial adverse change in the
significance of a tribal cultural resource as
defined in Public Resource Code 21074?
X
X
The project is sited on previously disturbed land. No historical, paleontological or archaeological
resources are expected to be encountered. If in the unlikely event a cultural resource is
discovered to any ground disturbance/excavation, all activity around the discovery will stop
immediately and proceed with an archaeological investigation/consultation. Furthermore, in the
event that interred human remains are encountered during project ground disturbance, the
applicable state law will be followed that requires notification to the County Coroner. No impacts
to cultural resources are anticipated.
The Sensitivity Map for Cultural Resources in the 1993 Conservation and Open Space Element
of the Imperial County General Plan classifies the site of the proposed project as an area of
zero to rare incidence for cultural resources. Furthermore, the COSE is currently in the process
of being updated and its 2015 Conservation & Open Space Element Baseline Environmental
Inventory Report designated the area where the project site is located as having low prehistoric
resource sensitivity and low of Native American cultural sensitivity.
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VI. GEOLOGY AND SOILS - Would the
project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Expose people or structures to potential
substantial adverse effects, including the risk
of loss, injury, or death involving:
i) Rupture of a known earthquake fault, as
delineated on the most recent AlquistPriolo 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?
X
X
iii) Seismic-related ground failure, including
liquefaction?
X
X
iv) Landslides?
b. Result in substantial soil erosion or the loss
of topsoil?
X
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?
X
d. Be located on expansive soil, as defined in
Table 18-1-B of the Uniform Building Code
(1994 or most current edition), creating
substantial risks to life or property?
X
e. Have soils incapable of supporting the use
of septic tanks or alternative wastewater
disposal systems where sewers are not
available for the disposal of wastewater?
X
There are no known active faults underlying the project site. However, the project site could be
subjected to moderate to severe ground shaking in the event of a major earthquake along the
San Andreas or Imperial fault zones but no more so than Imperial County in general which is
classified as a Seismic Zone 4 by the Uniform Building Code. Such hazards are typically
mitigated by structural design in general accordance with the applicable building codes;
consequently a geotechnical study was conducted to assess the project site (Geotechnical
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Investigation IID New Fleet Shops, Sierra Material Testing & Inspection, Inc. March 2016) and
determine site-specific design measures in accordance with the seismic code requirements that
will be incorporated into the project’s design criteria.
Although liquefaction may occur at depth, the geotechnical study estimates that the site will
generally behave as a deep soil site with respect to the seismic response of the proposed
structure. The project does not involve any activities, such as mining or groundwater withdrawal
that could cause land subsidence.
Furthermore pursuant to the above mentioned study, the project isn’t sited on a geologic unit or
soil 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.
The California Department of Conservation Landslide Inventory map (DOC 2013a) was used to
identify possible landslide problem areas. The project site is located on relatively level terrain
and is not located in an area with a probability of landslides. No impact would occur.
Best Management Practices will be included as part of the Storm Water Pollution Prevention
Plan that will be prepared for the project and if required would be implemented to manage
erosion and the loss of topsoil during construction-related activities.
The entire site is underlain by Quaternary age lacustrine deposits. The sediments consist of
moist, stiff, fat clay (United Soil Classifications CH). The clay is highly expansive, hence the
project’s design engineering is considering: 1) removal and replacement of the expansive soil in
the subgrade area with low expansion import and 2) the construction of a thickened, reinforced
slab on the existing subgrade with perimeter moisture control.
The proposed project will connect to the existing water and sewer mains at IID HQ. Septic tanks
or alternative wastewater disposal systems are not part of the Proposed Project design.
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VII. GREENHOUSE GAS EMISSIONS Would the project:
a. Generate greenhouse gas emissions, either
directly or indirectly, that may have a
significant impact on the environment,
based on any applicable threshold of
significance?
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
No
Significant Impact
Impact
X
b. Conflict with any applicable plan, policy or
regulation of an agency adopted for the
purpose of reducing the emissions of
greenhouse gases?
X
The main source of greenhouse gas (GHG) emissions associated with the project would be
short-term combustion of fossil fuels during construction activities. Overall, the proposed project
would not change the amount of operational emissions generated by the existing Fleet Services
shops which is minimal due to the nature of the services provided.
Construction emissions, as a result of activities such as grading and site preparation, can
potentially cause an increase in particulate matter (PM10); however, the construction activities
related to the project are not expected to violate any air quality standard or contribute
substantially to greenhouse gases, since ground disturbance is expected to be minimal and the
project will be adhering to the standard measures as set forth in APCD’s Regulation VIII and
Section 7.1 of their CEQA Air Quality Handbook (Amended 2007).
Furthermore, given the crux of the project entails the installation of a pre-engineered metal
building structure and considering the short duration of the construction schedule, the use of
construction related fossil-fuel combusting equipment will be minimal.
It is important that although Imperial County has not established formal quantitative or
qualitative thresholds through a public rulemaking process; CEQA permits the County to
establish a project-specific threshold of significance if backed by substantial evidence, until such
time as a formal threshold is approved.
Consequently, notwithstanding the previous statement, there is no indication that the
construction and operation of the project would generate significant levels of greenhouse gas
emissions. Thus less than significant impacts are expected.
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VIII. HAZARDS AND HAZARDOUS
MATERIALS - Would the project:
a. Create a significant hazard to the public or
the environment through the routine
transport, use, or disposal of hazardous
materials?
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
X
b. Create a significant hazard to the public or
the environment through the reasonably
foreseeable upset and accident conditions
involving the likely release of hazardous
materials into the environment?
X
c. Emit hazardous emissions or handle
hazardous or acutely hazardous materials,
substances, or waste within one-quarter
mile of an existing or proposed school?
X
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 the
environment?
X
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 result in a safety hazard for people
residing or working in the project area?
X
f. For a project within the vicinity of a private
airstrip, would the project result in a safety
hazard for people residing or working in the
project area?
X
g. Impair implementation of or physically
interfere with an adopted emergency
response plan or emergency evacuation
plan?
X
h. Expose people or structures to the risk of
loss, injury or death involving wildland fires,
including where wildlands are adjacent to
urbanized areas or where residences are
X
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intermixed with wildlands?
The project will involve the storage, use and disposal of hazardous materials related to the
construction as well as the operation (lubricants, anti-freeze, battery acid, solvents, etc.) of the
new facilities. IID and its contractors shall follow all applicable federal, state and local codes and
regulations, including but not limited to Code of Federal Regulations (CFR) Title 40, California
Code of Regulations (CCR) Title 22, California Occupational Health and Safety Administration,
the California Fire Code, the National Fire Protection Association and manufacturer instructions
for the management and use of hazardous materials for the construction as well as the operation
of the new Fleet Services shops. In addition, Best Management Practices stipulating proper
storage and handling of hazardous materials would be implemented during construction as part
of the Stormwater Pollution Prevention Plan.
The project is not within the vicinity of a private airstrip and not within the current footprint of the
Imperial County Airport Compatibility Map, as presented in the Imperial County Airport Land Use
Compatibility Plan, the project’s construction or operation does not conflict with the airport’s
activities.
Furthermore, the project site is not included in any known adopted emergency response plans or
emergency evacuation plan nor are they located within a roadway; the project site is located
within IID property. The project does not expose people or structures to the risk of loss, injury or
death involving wildland fires.
The project location is not included in the list of hazardous materials sites compiled by the
California Department of Toxic Substances Control, pursuant to Government Code Section
65962.5, nor within a one-quarter mile of existing or proposed schools of the project.
Thus there are less than significant impacts associated with this environmental factor.
Page 15
IX. HYDROLOGY AND WATER QUALITY Would the project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Violate any water quality standards or
waste discharge requirements?
X
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 (i.e., the
production rate of pre-existing nearby wells
would drop to a level which would not
support existing land uses or planned uses
for which permits have been granted)?
X
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
X
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,
which would result in flooding on- or offsite?
X
e. Create or contribute runoff water which
would exceed the capacity of existing or
planned storm water drainage systems or
provide substantial additional sources of
polluted runoff?
X
f. Otherwise substantially degrade water
quality?
X
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?
X
h. Place within a 100-year flood hazard area
structures, which would impede or redirect
flood flows?
X
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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?
X
X
j. Inundation by seiche, tsunami, or mudflow?
The Project site consists of relatively flat previously disturbed terrain. The surrounding
topography is relatively flat as well. Although existing drainage patterns are being maintained,
there is drainage at the project site that currently flows uncontrolled in the northeast portion of the
site.It is expected that stormwater generated in the project site will be directed, towards the
Dolson Drain.
The project would connect to the City of Imperial water system. The water demand during
construction is estimated to be no more than 5,000 gallons per day from an on-site source for
approximately 60 work days. For operational purposes the Fleet Services shops would mirror the
water consumption of the existing facility it will be replacing, requiring water for bathrooms,
breakroom, eyewash station, wash sinks and a vehicle wash rack. The project would not involve
groundwater withdrawal or interfere with groundwater recharge or involve any site excavation for
the purpose of intercepting an aquifer.
During construction, water quality impacts could occur without proper controls. Soil loosened
during grading, spills of fluids or fuels from vehicles and equipment or miscellaneous construction
materials and debris, if mobilized and transported off-site in overland flow, could degrade surface
and groundwater quality. In the event of heavy rainfall, runoff from construction areas could flow
off-site and reach nearby surface water drainage facilities. Consequently, the project will comply
with the General Construction Permit (Order No. 2009-0009-DWQ as amended by Order No.
2012-0006-DWQ and adopted on July 17, 2012 by the State Water Board); a Storm Water
Pollution Prevention Plan, listing best management practices to prevent construction pollutants
and products from violating any water quality standard or waste discharge requirements will be
developed and implemented for the project. Furthermore, the project’s drainage plan would be
designed by a registered civil engineer to safely manage conveyance of stormwater runoff to the
existing Dolson Drain.
The construction and operation of the project will not violate any water quality standards, waste
discharge requirements, deplete groundwater supplies or interfere substantially with groundwater
recharge. Alterations to the site’s existing drainage pattern, which are uncontrolled, will now be
directed to the Dolson Drain and are expected to have negligible impacts.
The proposed project would involve only at-grade construction. The project site would require
grading and paving on-site to accommodate the new facility. The project would cause a slight
increase in impervious surfaces compared to the existing ground conditions. However, this would
not create or contribute runoff water which would exceed the capacity of existing storm water
drainage systems or provide substantial additional sources of polluted runoff. Implementation of
BMPs during construction would ensure that flooding would not occur on- or off-site and
installation of on-site drainage infrastructure would increase the site’s capacity to control runoff
and is not expected to exceed the capacity of existing stormwater drainage systems.
Page 17
There are no streams or rivers that transect the project site. The project would not alter the
natural course of drainage on-site due to grading and paving and placement of structures.
As previously mentioned a SWPPP would provide BMPs required during construction to prevent
erosion and siltation and also BMPs to be incorporated after project completion to prevent future
erosion and siltation. Implementation of proper temporary and long-term erosion and sediment
control BMPs would minimize potential erosion or siltation on or off-site both during and following
construction.
Regarding potential hazardous substances used on-site. The project would follow all state and
federal regulations regarding discharge of effluent and would not discharge any materials or
substances that may degrade water quality into any water bodies.
The project is located within Zone X, which designates an area of minimal flood hazard, per
Federal Emergency Management Agency’s Flood Insurance Rate Map, Panel 06025C1725C
(FIRM effective on September 26, 2008).
Furthermore, no aspect of the project would involve exposure of people or structures to risks
associated with flooding. The project site is not located in an area subject to inundation because
of dam or levee failure or within a seiche, tsunami, or mudflow hazard area.
Page 18
X. LAND USE AND PLANNING - Would the
project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Physically divide an established
community?
X
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?
X
c. Conflict with any applicable habitat
conservation plan or natural communities’
conservation plan?
X
The project will not physically divide any established community nor pose any conflict with
applicable general plan designations, zoning ordinances or any applicable habitat or natural
communities’ conservation plans. This project will be constructed in compliance with all the
applicable local, county, and state codes.
Page 19
XI. MINERAL RESOURCES - Would the
project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
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?
X
b. Result in the loss of availability of a locallyimportant mineral resource recovery site
delineated on a local general plan, specific
plan, or other land use plan?
X
The project route is not located within a known mineral resource area as per the Existing Mineral
Resources Map (Figure 8) of the Imperial County Conservation and Open Space Element,
adopted March 8, 2016.
Page 20
XII. NOISE - Would the project result in:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
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?
X
b. Exposure of persons to or generation of
excessive ground borne vibration or ground
borne noise levels?
X
c. A substantial permanent increase in
ambient noise levels in 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?
X
X
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?
X
f. For a project within the vicinity of a private
airstrip, would the project expose people
residing or working in the project area to
excessive noise levels?
X
The existing noise environment in the vicinity of the project site can be described as an industrial
area with medium to high ambient noise levels. The primary noise source in the vicinity of the
proposed project is roadway traffic on State Route 86, intermittent railroad traffic and IID
operations and maintenance activities including the current Fleet Services shops.
During the construction of the project, noise from construction activities would add to the noise
environment in the immediate vicinity around the project site. Activities involved in the
construction would generate at or below noise levels, as indicated in the table below, ranging
from 78 to 85 dBA at a distance of 50 feet. Noise would also be generated during the
construction phase by increased truck traffic of materials and equipment to and from the
construction site. This noise increase would be intermittent and of short duration.
Page 21
(Source: Noise Assessment by J.C. Brennan & Associates. 2013; Draft Initial Study and Mitigated Negative Declaration Santa Cruz
Auto Shop New Construction Project; Appendix F)
For comparison purposes, the following table describes typical noise levels of common outdoor
and indoor activities.
(Source: Noise Assessment by J.C. Brennan & Associates. 2013; Draft Initial Study and Mitigated Negative Declaration Santa Cruz
Auto Shop New Construction Project; Appendix F)
Considering that it is foreseen that the construction of the facility would be within the standards
and policies established by the City of Imperial General Plan, the project would not result in
exposure of persons to or generation of noise levels in excess of these standards and policies
and construction would only occur during 7:00 a.m. and 8:00 p.m., per the City of Imperial Noise
Element, in vicinity principally zoned industrial.
Typical noise sources associated with the operation of new facility would include pneumatic air
wrenches, compressors, impact tools, etc. The noise levels associated with the project were
evaluated using noise measurement data collected for similar projects in California (Noise
Assessment by J.C. Brennan & Associates. 2013; Draft Initial Study and Mitigated Negative
Page 22
Declaration Santa Cruz Auto Shop New Construction Project; Appendix F). Based on this data,
maximum noise levels could be as high as 40 dBA, assuming that several pieces of equipment
were operating at any given time and the cumulative hourly equivalent continuous noise level is
predicted to be 34 dBA at the nearest property line. The noise levels would comply with the
stationary noise source standards outlined by the City of Imperial General Plan Noise Element of
no greater than 55 dBA CNEL (Community Noise Equivalent Level) allowed to be transmitted
offsite to noise sensitive land uses without mitigation. The residential development on the north
side of the project site across from 15th Street is at a distant greater than 120 ft.
Furthermore, the California Department of Health has established guidelines for assessing the
compatibility of community noise environments and land uses and has determined 60 and 65
dBA CNEL are the highest threshold levels for the most noise-sensitive land uses, which are
single and multiple family residences.
It is important to note that all building construction with no special noise control provisions offer
some noise reduction and a typical metal building system with open bays could reduce noise
levels by 15 dBA.
The new facility once in operation would not increase the overall traffic to the IID headquarters
since it will be replacing an existing facility in service and capacity. Consequently an increase in
traffic noise levels due to an increase in traffic to the new facility is virtually non-existent.
In essence the project would be replacing the current Fleet Services facility; consequently no
increase in operational ambient noise levels above the existing levels (which are within the City
of Imperial General Plan Noise Element standards) without the project is anticipated in the
project vicinity.
The Project site is not within the vicinity of a private airstrip and not located within the Imperial
County Airport Compatibility Map, as presented in the Imperial County Airport Land Use
Compatibility Plan; however, given the flight paths, type of aircraft using the airport and distance
to the airport, the project would not expose people working in the project area to excessive noise
levels.
Human and structural response to different vibration levels is influenced by a number of factors,
including ground type, distance between source and receptor, duration, and the number of
perceived vibration events. Vibration criteria developed by Caltrans indicate that the threshold for
damage to structures ranges from 2 to 6 in/sec. The tables below show the vibration levels in
PPV (peak particle velocity) for varying construction equipment that could be used during
construction and the thresholds at which human annoyance could occur.
Page 23
(Source: On line National Transportation Library)
(Source: Caltrans Transportation- and Construction-Induced Vibration Guidance Manual)
Based upon the distances to the nearest residential receivers (greater than 120 feet), it is not
expected that vibration due to construction would result in human annoyance or architectural
damage.
Page 24
XIII. POPULATION AND HOUSING - Would
the project:
Potentially
Significant
Impact
Potentially
Less Than
Significant Significant
No
Unless
Impact
Impact
Mitigation
Incorporated
a. Induce substantial population growth in an
area, either directly (for example, by
proposing new homes and business) or
indirectly (for example, through extension of
roads or other infrastructure)?
X
b. Displace substantial numbers of existing
housing, necessitating the construction of
replacement housing elsewhere?
X
c. Displace substantial numbers of people,
necessitating the construction of
replacement housing elsewhere?
X
The project entails the construction of a fleet services facility within existing IID property to
provide maintenance support to IID’s vehicular and operational equipment. No existing housing
or residents will be displaced by the proposed project. The project will not alter the location,
distribution, density, or growth rate of the population of the city of Imperial or Imperial County
since construction impacts are of short duration and the facility will be replacing an existing one,
no new full-time employees will be hired to operate the facility.
Page 25
XIV. PUBLIC SERVICES – Would the
project:
Potentially
Significant
Impact
Potentially
Less Than
Significant Significant
No
Unless
Impact
Impact
Mitigation
Incorporated
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:
Police protection?
Schools?
Parks?
Other public facilities?
X
X
X
X
The project will not significantly increase local fire protection demands and the nature of the
project is such that it would have no effect on demands for police protection. No feature of the
project would generate a demand for school services or other public facilities.
Page 26
XV. RECREATION – Would the project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Would the project increase the use of
existing neighborhood and regional parks
or other recreational facilities such that
substantial physical deterioration of the
facility would occur or be accelerated?
X
b. Does the project include recreational
facilities or require the construction or
expansion of recreational facilities which
might have an adverse physical effect on
the environment?
X
The proposed project would not increase the demand for parks or other recreational facilities.
The proposed project does not include recreational facilities and would not have an adverse
effect on surrounding recreational areas.
Page 27
XVI. TRANSPORTATION/TRAFFIC - Would
the project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Result in a substantial increase in the
number of vehicle trips, roadway vehicle
volume or vehicle miles traveled?
X
b. 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?
X
c. Substantially increase hazards to a design
feature (e.g., sharp curves or dangerous
intersections) or incompatible uses (e.g.,
farm equipment)?
X
X
d. Result in inadequate emergency access?
e. Conflict with adopted policies, plans, or
programs supporting alternative
transportation (e.g., bus turnouts, bicycle
racks)?
X
Temporary construction traffic is expected but should not substantially contribute to existing
traffic in the area. However, in order to address traffic safety during construction, a traffic control
plan will be developed and implemented per applicable regulations for the construction phase of
the project. There will be no public road closures or detours associated with the construction.
After construction, an increase in current traffic levels is not anticipated since the project, once
operational, will be replacing an existing facility with its current levels of traffic. The project will
not affect air traffic patterns either directly or indirectly. No traffic hazards are anticipated as a
result of the proposed project. There will be no restriction of emergency access to the site or to
any other area. No public parking areas would be affected and no conflicts with adopted policies
supporting alternative transportation would occur.
Page 28
XVII. UTILITIES AND SERVICE SYSTEMS Would the project:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
a. Exceed wastewater treatment
requirements of the applicable Regional
Water Quality Control Board?
X
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?
X
c. Require or result in the construction of new
storm water drainage facilities or
expansion of existing facilities, the
construction of which could cause
significant environmental effects?
X
d. Have sufficient water supplies available to
serve the project from existing entitlements
and resources, or are new or expanded
entitlements needed?
X
e. Result in a determination by the
wastewater treatment provider which
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?
X
f. Be served by a landfill with sufficient
permitted capacity to accommodate the
project’s solid waste disposal needs?
X
g. Comply with federal, state, and local
statutes and regulations related to solid
waste?
X
The project would connect to the existing water service and sewage system at the IID
headquarters yard. The project is not expected to substantially increase its daily use of water or
disposal of wastewater. No new water or wastewater treatment facilities will be required.
Page 29
For the construction phase a SWPPP will be developed and implemented listing BMPs to
prevent construction pollutants and products from violating water quality standard or waste
discharge requirements. The project includes the installation of a permanent drainage system.
IID headquarters has existing water connections on-site, and trenching would occur to connect
the proposed facility to underground utilities, including water service. Construction activities
would require approximately 5,000 gallons of water per day to be pumped from a hydrant on-site.
The new Fleet Services shops would require water service for operations, vehicle wash rack,
bathrooms, break room, eyewash, janitorial sinks and fire sprinklers throughout the entire
building. The fire suppression system will be installed with a separate water line on-site. The City
of Imperial Utilities Services has sufficient capacity to service the project.
Construction waste associated with the project will be disposed of at the appropriate landfills
pursuant to City of Imperial and County of Imperial codes. The characteristics of the project
preclude landfill capacity insufficiency. Furthermore, the new Fleet Services shops are replacing
an existing facility and solid waste produced from operations and maintenance would be
equivalent to the amount currently produced at the existing location thus no new long-term
source of solid waste production would result.
Solid waste generated by the project will be handed and disposed of in compliance with statues
and regulations related to solid waste.
Page 30
XVIII. MANDATORY FINDINGS OF
SIGNIFICANCE:
Potentially
Significant
Impact
Potentially
Less Than
No
Unless
Impact
Mitigation
Incorporated
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?
X
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, effects of other current
projects, and the effects of probable future
projects).
X
c. Does the project have environmental
effects which will cause substantial
adverse effects on human beings, either
directly or indirectly?
X
The proposed project does not have the potential to degrade the quality of the environment. The
New Fleet Services Shops Project would not result in adverse effects on human beings either
directly or indirectly. The proposed project would have a beneficial effect by providing operational
support to the IID and contributing in providing reliable service to IID’s ratepayers.
Page 31
XVIII. EARLIER ANALYSIS. Earlier analyses may be used where, pursuant to the
tiering, program EIR, or other CEQA process, one or more effects have been adequately
analyzed in an earlier EIR or negative declaration. Section 15063(c) (3) (D). Not
applicable in this case; no earlier analysis used.
References:
U.S. Fish & Wildlife Service Conservation Library Online.
<http://nctc.fws.gov/resources/knowledge-resources/>
California Fish and Game Code.
http://www.leginfo.ca.gov/cgi-bin/calawquery?codesection=fgc&codebody=&hits=20
The California Air Pollution Control Officers Association (CAPCOA). 2008. CEQA & Climate
Change: Evaluating and Addressing Greenhouse Gas Emissions from Projects Subject to the
California Environmental Quality Act. January.
http://www.capcoa.org/wp-content/uploads/downloads/2010/05/CAPCOA-White-Paper.pdf
California Air Resources Board. 2008. Preliminary Draft Staff Proposal Recommended
Approaches for Setting Interim Significance Thresholds for Greenhouse Gases under the
California Environmental Quality Act. October.
Accessed via
http://www.arb.ca.gov/cc/localgov/ceqa/meetings/102708/prelimdraftproposal102408.pdf
Imperial County Air Pollution Control District CEQA Air Quality Handbook, November 2007.
http://www.co.imperial.ca.us/AirPollution/Forms%20&%20Documents/CEQA/CEQA%20Handbk%
20Nov%202007.pdf
United States Environmental Protection Agency Indoor Air Quality Website
http://www.cdph.ca.gov/HealthInfo/environhealth/Documents/Radon/CaliforniaRadonDatabase.pd
f
Report: “Geotechnical Investigation IID New Fleet Shops” Prepared By Sierra Material Testing &
Inspection, Inc. 2016.March.
State Water Resources Control Board Construction Storm Water Program.
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.shtml
California Department of Conservation Landslide Inventory map (DOC 2013a)
http://www.conservation.ca.gov/cgs/geologic_hazards/landslides
CalEPA/California Department of Toxic Substances Control - Waste and Substances Site List
http://www.calepa.ca.gov/SiteCleanup/CorteseList/SectionA.htm
Imperial County Conservation and Open Space Element.2016. March.
http://icpds.com/CMS/Media/Conservation-&-Open-Space-Element-2016.pdf
Imperial County Airport Land Use Compatibility Plan
http://www.icpds.com/?pid=2202
Noise Element of the City of Imperial General Plan.
http://www.cityofimperial.org/public_docs/Docs/Planning/general.plan.1992/Chapter%203/NOISE
%20ELEMENT.pdf
Page 32
Noise Assessment by J.C. Brennan & Associates. 2013; Draft Initial Study and Mitigated
Negative Declaration Santa Cruz Auto Shop New Construction Project; Appendix F.
http://calfire.ca.gov/resource_mgt/downloads/EP_PublicNotice/SantaCruz_AutoShop_Constructio
n_Draft_IS-MND.pdf
Online National Transportation Library
http://ntl.bts.gov/data/rail05/ch12.pdf
Transportation- and Construction-Induced Vibration Guidance Manual.California Department of
Transportation. June 2004.
http://www.dot.ca.gov/hq/env/noise/pub/vibrationmanFINAL.pdf
Page 33
Figure No. 1 – Vicinity & Location Maps
Page 34
Figure No. 2 – Project Location Map within IID HQ
Page 34
Figure No. 3 – Project Floor Plan
Page 35

Initial Study New Fleet Services Shops Project Project No. 100644

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