4.6 AIR QUALITY - City of Chico
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4.6 AIR QUALITY
This section examines the air quality in the Planning Area and region, includes a summary of
applicable air quality regulations, and analyzes potential air quality impacts associated with the
proposed General Plan Update.
4.6.1 EXISTING SETTING
AIR BASIN CHARACTERISTICS
Sacramento Valley Air Basin
The California Air Resources Board (CARB) divides the state into air basins that share similar
meteorological and topographical features. The City of Chico is located in the 11-county
Sacramento Valley Air Basin (SVAB), which includes all of Sacramento, Yolo, Yuba, Sutter,
Colusa, Glenn, Butte, Tehama, and Shasta counties and parts of Solano and Placer counties. The
SVAB climate is characterized by hot, dry summers and cool, wet winters. Chico’s annual
average temperature is 61 degrees Fahrenheit, with summer highs usually in the 90s and winter
lows usually in the 30s. Rainfall in Chico averages about 26 inches per year, with about 55
percent of rainfall occurring in winter and 2 percent during the summer (WRCC, 2009). Prevailing
winds are moderate in strength and vary from dry land flows from the north to moist ocean
breezes from the south. The mountains surrounding the SVAB create a barrier to airflow which,
under certain meteorological conditions, trap pollutants in the valley.
AMBIENT AIR QUALITY STANDARDS
Both the U.S. Environmental Protection Agency (USEPA) and CARB established ambient air
quality standards for common air pollutants. These ambient air quality standards are levels of
contaminants that represent safe levels which avoid specific adverse health effects associated
with each pollutant. The ambient air quality standards cover what are called “criteria” pollutants
because the health and other effects of each pollutant are described in criteria documents. The
federal and California ambient air quality standards for important pollutants are summarized in
Table 4.6-1. The federal and state ambient standards were developed independently with
differing purposes and methods, although both processes attempted to avoid health-related
effects. As a result, federal and state standards differ in some cases. In general, California
standards are more stringent. This is particularly true for nitrogen dioxide (NO2) and coarse
particulate matter (PM10).
On January 6, 2010, EPA announced that they are reconsidering the ozone standards set in
2008. EPA is proposing to strengthen the 2008 ozone 8-hour standards from 0.075 ppm down to a
level within the range of 0.060-0.070 ppm, and establish a seasonal “secondary” standard with
the range of 7-15 ppm-hour to protect sensitive vegetation and ecosystems, including forests,
parks, wildlife refuges and wilderness areas. The scheduled deadline for ARB to submit the new
nonattainment recommendations to EPA will be in January 2011. EPA plans to publish the final
area designations in July 2011 and the new SIP would then be due to EPA in December 2013.
City of Chico General Plan EIR
September 2010 Draft Environmental Impact Report
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TABLE 4.6-1
FEDERAL AND STATE AMBIENT AIR QUALITY STANDARDS
Federal Primary
Pollutant Averaging Time State Standard
Standard
1-Hour -- 0.09 ppm
Ozone (O3)
8-Hour 0.075 ppm 0.07 ppm
3
Coarse Particulate Matter 24-Hour 150 µg/m 50 µg/m3
(PM10) Annual Average – 20 µg/m3
Fine Particulate Matter 24-Hour 35 µg/m3 –
(PM2.5) Annual Average 15 µg/m 3
12 µg/m3
1-Hour 35 ppm 20 ppm
Carbon Monoxide (CO)
8-Hour 9.0 ppm 9.0 ppm
1-Hour -- 0.18 ppm
Nitrogen Dioxide (NO2)
Annual Average 0.053 ppm 0.03 ppm
1-Hour – 0.25 ppm
Sulfur Dioxide (SO2) 24-Hour 0.14 ppm 0.04 ppm
Annual Average 0.03 ppm --
Notes: ppm = parts per million, µg/m3 = micrograms per cubic meter
Source: CARB, 2009a
AMBIENT AIR QUALITY
CARB maintains several air quality monitoring sites in the SVAB, including a site in Chico on
Manzanita Avenue. Table 4.6-2 shows historical occurrences of pollutant levels exceeding state
and federal ambient air quality standards for the three-year period of 2006 through 2008. The
number of days that each standard was exceeded is shown. For example, the monitoring site at
Manzanita Avenue measured 37 days of 2008 in which California PM10 emission standards were
exceeded.
TABLE 4.6-2
AMBIENT AIR QUALITY MONITORING DATA FOR CHICO (MANZANITA AVENUE)
Pollutant Standards 2006 2007 2008
Ozone
Max 1-hour concentration (ppm) 0.090 0.094 0.111
Max 8-hour concentration (ppm) (federal/state) 0.080/0.080 0.084/0.084 0.096/0.097
Number of days standard exceeded
State 1-hour standard 0 0 2
Federal 8-hour standard 4 3 6
State 8-hour standard 19 10 14
Coarse Particulate Matter (PM10)
Max 24-hour concentration (µg/m3) (federal/state) 76.0/81.0 61.9/66.1 143.5/140.8
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Draft Environmental Impact Report September 2010
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Pollutant Standards 2006 2007 2008
Annual average concentration (µg/m3) 26.8 21.7 27.6
Number of days standard exceeded
Federal 24-hour standard 0 0 0
State 24-hour standard 41.0 12.1 37.0
Fine Particulate Matter (PM2.5)
Max 24-hour concentration (µg/m3) (federal/state) 67.0/76.1 53.9/83.7 107.6/190.9
Annual average concentration (µg/m3) (federal/state) 13.1/14.6 10.6/14.3 16.4/18.1
Number of days standard exceeded
Federal 24-hour standard 28.8 24.3 36.5
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September 2010 Draft Environmental Impact Report
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Pollutant Standards 2006 2007 2008
Carbon Monoxide (CO)
Max 8-hour concentration (ppm) 2.70 2.16 2.74
Number of days standard exceeded
Federal 8-hour standard 0 0 0
State 8-hour standard 0 0 0
Nitrogen Dioxide (NO2)
Max 1-Hour concentration (ppm) 0.048 0.046 0.048
Annual Concentration (ppm) 0.009 0.010 0.009
Number of days standard exceeded
State 1-hour standard 0 0 0
Sulfur Dioxide (SO2) - no data
Source: CARB, 2009a
AMBIENT AIR QUALITY ATTAINMENT STATUS
Table 4.6-3 shows the federal and state attainment status for the SVAB. The region is
nonattainment for federal ozone and PM2.5 standards, and nonattainment for state ozone and
PM10 and PM2.5 standards.
Areas with air quality that exceed adopted air quality standards are designated as
“nonattainment” areas for the relevant air pollutants. Nonattainment areas are sometimes
further classified by degree (marginal, moderate, serious, severe, and extreme for ozone, and
moderate and serious for carbon monoxide and PM10) or status (“nonattainment-transitional”).
Areas that comply with air quality standards are designated as “attainment” areas for the
relevant air pollutants. “Unclassified” areas are those with insufficient air quality monitoring data
to support a designation of attainment or nonattainment, but are generally presumed to comply
with the ambient air quality standard. State Implementation Plans must be prepared by States
for areas designated as federal nonattainment areas to demonstrate how the area will come
into attainment of the exceeded federal ambient air quality standard.
As detailed in the Regulatory Framework discussion below, both the California Air Resources
Board (CARB) and the U.S. Environmental Protection Agency (EPA) have established air pollution
standards in an effort to protect human health and welfare. Geographic areas are designated
attainment if these standards are met and nonattainment if they are not met. In addition, each
agency has several levels of classifications based on severity of the problem. For example, the
SVAB is classified moderate nonattainment area for 1-hour ozone, as summarized in Table 4.6-3.
General Plan EIR City of Chico
Draft Environmental Impact Report September 2010
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TABLE 4.6-3
FEDERAL AND STATE AMBIENT AIR QUALITY ATTAINMENT STATUS
FOR SACRAMENTO VALLEY AIR BASIN
Pollutant Federal State
1-hour Ozone (O3) – Moderate Nonattainment
8-hour Ozone (O3) Nonattainment Nonattainment
Coarse Particulate Matter (PM10) Unclassified Nonattainment
Fine Particulate Matter (PM2.5) Nonattainment Nonattainment
Carbon Monoxide (CO) Attainment Attainment
Nitrogen Dioxide (NO2) Attainment Attainment
Sulfur Dioxide (SO2) Attainment Attainment
Source: BCAQMD, 2009; CARB, 2010
AIR POLLUTANTS OF CONCERN AND HEALTH EFFECTS
The most problematic pollutants in the Chico area include ozone and particulate matter. The
health effects and major sources of these pollutants, as well as other key pollutants, are
described below. Toxic air contaminants are a separate class of pollutants and are discussed
later in this section.
Ozone
Ground-level ozone (O3), commonly referred to as smog, is greatest on warm, windless, sunny
days. O3 is not emitted directly into the air, but is formed through a complex series of chemical
reactions between reactive organic gases (ROG) and nitrogen oxides (NOX). These reactions
occur over time in the presence of sunlight. O3 formation can occur in a matter of hours under
ideal conditions. The time required for O3 formation allows the reacting compounds to spread
over a large area, producing a regional pollution concern. Once formed, O3 can remain in the
atmosphere for one or two days.
O3 is also a public health concern because it is a respiratory irritant that increases susceptibility to
respiratory infections and diseases, and because it can harm lung tissue at high concentrations.
In addition, O3 can cause substantial damage to leaf tissues of crops and natural vegetation
and can damage many natural and manmade materials by acting as a chemical oxidizing
agent. The principal sources of the O3 precursors (ROG and NOX) are the combustion of fuels
and the evaporation of solvents, paints, and fuels.
Particulate Matter
Particulate matter (PM) can be divided into several size fractions. Coarse particles (PM10) are
between 2.5 and 10 microns in diameter and arise primarily from natural processes, such as
wind-blown dust or soil. Fine particles (PM2.5) are less than 2.5 microns in diameter and are
produced mostly from combustion or burning activities. Fuel burned in cars and trucks, power
plants, factories, fireplaces, and wood stoves produces fine particles.
The level of PM2.5 in the air is a public health concern because it can bypass the body’s natural
filtration system more easily than larger particles and can lodge deep in the lungs. The health
effects vary depending on a variety of factors, including the type and size of particles. Research
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has demonstrated a correlation between high PM concentrations and increased mortality rates.
Elevated PM concentrations can also aggravate chronic respiratory illnesses such as bronchitis
and asthma.
Carbon Monoxide
Carbon monoxide (CO) is an odorless, colorless gas that is formed by the incomplete
combustion of fuels. Motor vehicle emissions are the dominant source of CO in the SVAB. At high
concentrations, CO reduces the oxygen-carrying capacity of the blood and can cause
dizziness, headaches, unconsciousness, and even death. CO can also aggravate
cardiovascular disease. Relatively low concentrations of CO can significantly affect the amount
of oxygen in the bloodstream because CO binds to hemoglobin 220 to 245 times more strongly
than oxygen.
CO emissions and ambient concentrations have decreased significantly in recent years. These
improvements are due largely to the introduction of cleaner burning motor vehicles and motor
vehicle fuels. CO is still a pollutant that must be closely monitored, however, due to its severe
effect on human health.
Elevated CO concentrations are usually localized and are often the result of a combination of
high traffic volumes and traffic congestion. Elevated CO levels develop primarily during winter
periods of light winds or calm conditions combined with the formation of ground-level
temperature inversions. Wintertime CO concentrations are higher because of reduced
dispersion of vehicle emissions and because CO emission rates from motor vehicles increase as
temperature decreases.
Nitrogen Dioxide
Nitrogen dioxide (NO2) is a brownish, highly reactive gas that is present in all urban environments.
The major human-made sources of NO2 are combustion devices such as boilers, gas turbines,
and mobile and stationary reciprocating internal combustion engines. Construction devices
emit primarily nitric oxide (NO), which reacts through oxidation in the atmosphere to form NO2.
The combined emissions of NO and NO2 are referred to as NOX. Because NO2 is formed and
depleted by reactions associated with O3, the NO2 concentration in a particular geographic
area may not be representative of the local NOX emission sources.
Inhalation is the most common route of exposure to NO2. Because NO2 has relatively low
solubility in water, the principal site of toxicity is in the lower respiratory tract. The severity of
adverse health effects depends primarily on the concentration inhaled rather than the duration
of the exposure. Exposure can result in a variety of acute symptoms, including coughing,
difficulty with breathing, vomiting, headache, and eye irritation. Symptoms that are more
significant may include chemical pneumonitis or pulmonary edema with breathing
abnormalities, cyanosis, chest pain, and rapid heartbeat.
Sulfur Dioxide
Sulfur dioxide (SO2) is produced by such stationary sources as coal and oil combustion, steel mills,
refineries, and pulp and paper mills. The major adverse health effects associated with exposure
to SO2 pertain to the upper respiratory tract. SO2 is a respiratory irritant, with constriction of the
bronchioles occurring with inhalation of SO2 at 5 ppm or more. On contact with the moist
mucous membranes, SO2 produces sulfurous acid, which is a direct irritant. Similar to NO2, the
severity of adverse health effects depends primarily on the concentration inhaled rather than
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the duration of the exposure. Exposure to high concentrations of SO2 may result in edema of the
lungs or glottis and respiratory paralysis.
Toxic Air Contaminants
In addition to the criteria pollutants discussed above, toxic air contaminants (TACs) are another
group of pollutants of concern. TACs are considered either carcinogenic or noncarcinogenic
based on the nature of the health effects associated with exposure to the pollutant. For
regulatory purposes, carcinogenic TACs are assumed to have no safe threshold below which
health impacts would not occur, and cancer risk is expressed as excess cancer cases per one
million exposed individuals. Noncarcinogenic TACs differ in that there is generally assumed to be
a safe level of exposure below which no negative health impact is believed to occur. These
levels are determined on a pollutant-by-pollutant basis.
There are many different types of TACs, with varying degrees of toxicity. Sources of TACs include
industrial processes such as petroleum refining and chrome plating operations, commercial
operations such as gasoline stations and dry cleaners, and motor vehicle exhaust. Public
exposure to TACs can result from emissions from normal operations, as well as from accidental
releases of hazardous materials during upset conditions. The health effects of TACs include
cancer, birth defects, neurological damage, and death. Table 4.6-4 displays potential sources
of TAC emissions for various land uses. According to CARB records, 238 facilities were located in
Chico in 2007 that were potential sources of TAC emissions (CARB, 2009a).
TABLE 4.6-4
TOXIC AIR EMISSION BY LAND USE
Land Use Toxic Air Emission
Auto Body Shop Benzene, Toluene, Xylene
Auto Machine Shop Asbestos
Chemical Manufacturing Ethylene, Dichloride, Asbestos
Dry Cleaner Perchloroethylene (phased out in 2011)
Electrical Manufacturing Polychlorinated Biphenyls (PCBs), Cadmium, Chromium, Nickel
Funeral Home Formaldehyde
Gasoline Station Benzene
Hospital Dioxin, Cadmium, Ethylene Oxide
Medical Equipment Sterilization Ethylene Oxide
Printing Services Ethyl Benzene, Ethylene Glycol, Xylene
Wastewater Treatment Benzene, Carbon Tetrachloride, Ethylene Dichloride, Chloroform
Source: EDCAPCD, 2002
Diesel Exhaust
Diesel exhaust is a TAC of growing concern in California. According to the California Almanac of
Emissions and Air Quality (CARB, 2009b), the majority of the estimated health risk from TACs can
be attributed to relatively few compounds, the most important being PM from diesel-fueled
engines (diesel PM). In 1998, CARB identified diesel PM as a TAC. Diesel PM differs from other
TACs in that it is not a single substance but rather a complex mixture of hundreds of substances.
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September 2010 Draft Environmental Impact Report
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The exhaust from diesel engines contains hundreds of different gaseous and particulate
components, many of which are toxic. Many of these compounds adhere to the particles, and
because diesel particles are so small, they penetrate deep into the lungs. Diesel engine
particulate has been identified as a human carcinogen. Mobile sources, such as trucks, buses,
automobiles, trains, ships, and farm equipment, are by far the largest source of diesel emissions.
Studies show that diesel particulate matter concentrations are much higher near heavily
traveled highways and intersections.
Although diesel PM is emitted by diesel-fueled internal combustion engines, the composition of
the emissions varies depending on engine type, operating conditions, fuel composition,
lubricating oil, and whether an emission control system is present. No ambient monitoring data
are available for diesel PM because no routine measurement method currently exists. However,
CARB has made preliminary concentration estimates based on a PM exposure method. This
method uses CARB’s emissions inventory PM10 database, ambient PM10 monitoring data, and the
results from several studies to estimate concentrations of diesel PM. In addition to diesel PM,
benzene, 1,3-butadiene, acetaldehyde, carbon tetrachloride, hexavalent chromium, para-
dichlorobenzene, formaldehyde, methylene chloride, and perchloroethylene pose the greatest
existing ambient risk, for which data are available, in California. However, diesel PM poses the
greatest health risk among the ten TACs mentioned. Based on receptor modeling techniques,
CARB estimated its health risk to be 360 excess cancer cases per million people in the SVAB.
Since 1990, the health risk from diesel PMs has been reduced by 52 percent. Overall, levels of
most TACs have decreased since 1990 except for para-dichlorobenzene and formaldehyde
(CARB, 2009b).
In 1998, after a 10-year scientific assessment process, CARB identified particulate matter from
diesel-fueled engines as a toxic air contaminant (TAC). Unlike criteria pollutants like carbon
monoxide, TACs do not have ambient air quality standards. Since no safe levels of TACs can be
determined, there are no air quality standards for TACs. Instead, TAC impacts are evaluated by
calculating the health risks associated with a given exposure. Two types of risk are usually
assessed: chronic non-cancer risk and acute non-cancer risk. Diesel particulate has been
identified as a carcinogenic material but is not considered to have acute non-cancer risks. The
State has begun a program of identifying and reducing risks associated with particulate matter
emissions from diesel-fueled vehicles. The plan consists of new regulatory standards for all new
on-road, off-road, and stationary diesel-fueled engines and vehicles, new retrofit requirements
for existing on-road, off-road, and stationary diesel-fueled engines and vehicles, and new diesel
fuel regulations to reduce the sulfur content of diesel fuel as required by advanced diesel
emission control systems. Land uses where individuals could be exposed to high levels of diesel
exhaust include:
Railroad operations
Warehouses
Schools with a high volume of bus traffic
High volume highways
High volume arterials and local roadways with a high level of diesel traffic
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Draft Environmental Impact Report September 2010
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Wood Smoke
Wood smoke has long been identified as a significant source of pollutants in urban and
suburban areas. Wood smoke contributes to particulate matter and CO concentrations,
reduces visibility, and contains numerous TACs. Present controls on this source include the
adoption of emission standards for wood stoves and fireplace inserts. Interest in wood smoke is
likely to increase with the recent adoption of a PM2.5 national standard.
Asbestos
Asbestos is the common name for a group of naturally-occurring fibrous silicate minerals that
can separate into thin but strong and durable fibers. Naturally-occurring asbestos (NOA), which
was identified as a TAC in 1986 by CARB, is located in many parts of California and is commonly
associated with ultamafic rock. Chico is not located near any areas that are likely to contain
ultramafic rock. For a complete discussion on asbestos and associated risks, the reader is
referred to the discussion in Section 4.4, Human Health/Risk of Upset.
Pesticides
Most pesticides are designed to harm or kill pests, and because some pests have systems similar
to the human system, some pesticides also can harm or kill humans (USEPA, 2009a). The hazards
associated with pesticides depend on the toxicity of the pesticide and the exposure a human
may receive in any situation.
The effects, or symptoms, of pesticide poisoning can be defined as either topical or systemic.
Topical effects generally develop at the site of pesticide contact and are a result of either the
pesticide’s irritant properties or an allergic response by the victim. Dermatitis, or inflammation of
the skin, is the most commonly reported topical effect associated with pesticide exposure.
Symptoms of dermatitis range from reddening of the skin to rashes and/or blisters. Other
symptoms include coughing, wheezing and sneezing when exposed to pesticide sprays (Penn
State, 2007).
Systemic effects often occur away from the original point of contact as a result of the pesticide
being absorbed into and distributed throughout the body. Systemic effects often include
nausea, vomiting, fatigue, headache, and intestinal disorders. In advanced poisoning cases, the
individual may experience changes in heart rate, difficulty breathing, convulsions, and coma,
which could lead to death (Penn State, 2007).
Common locations for pesticide use are agricultural land uses, where they are often used to
prevent insect damage to crops. Because of this, the proximity of sensitive receptors to
agricultural land uses could expose people to the hazards listed above.
Odors
Typically odors are regarded as an annoyance rather than a health hazard. However,
manifestations of a person’s reaction to foul odors can range from psychological (e.g., irritation,
anger, or anxiety) to physiological (e.g., circulatory and respiratory effects, nausea, vomiting,
and headache).
With respect to odors, the human nose is the sole sensing device. The ability to detect odors
varies considerably among the population and overall is quite subjective. Some individuals have
the ability to smell minute quantities of specific substances; others may not have the same
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sensitivity but may have sensitivities to odors of other substances. In addition, people may have
different reactions to the same odor; in fact, an odor that is offensive to one person (e.g., from a
fast-food restaurant) may be perfectly acceptable to another. It is also important to note that
an unfamiliar odor is more easily detected and is more likely to cause complaints than a familiar
one. This is because of the phenomenon known as odor fatigue, in which a person can become
desensitized to almost any odor and recognition only occurs with an alteration in the intensity.
Quality and intensity are two properties present in any odor. The quality of an odor indicates the
nature of the smell experience. For instance, if a person describes an odor as flowery or sweet,
then the person is describing the quality of the odor. Intensity refers to the strength of the odor.
For example, a person may use the word “strong” to describe the intensity of an odor. Odor
intensity depends on the odorant concentration in the air. When an odorous sample is
progressively diluted, the odorant concentration decreases. As this occurs, the odor intensity
weakens and eventually becomes so low that the detection or recognition of the odor is quite
difficult. At some point during dilution, the concentration of the odorant reaches a detection
threshold. An odorant concentration below the detection threshold means that the
concentration in the air is not detectable by the average human.
Sensitive Receptors and Pollution Sources
Sensitive receptors are facilities where sensitive receptor population groups (children, the elderly,
the acutely ill, and the chronically ill) are likely to be located. These land uses include schools,
retirement homes, convalescent homes, hospitals, and medical clinics.
4.6.2 REGULATORY FRAMEWORK
Air quality in the SVAB is addressed through the efforts of various federal, state, regional, and
local government agencies. These agencies work jointly, as well as individually, to improve air
quality through legislation, regulations, planning, policy making, education, and a variety of
programs. The agencies primarily responsible for improving the air quality in the City of Chico are
discussed below along with their individual responsibilities.
FEDERAL
U.S. Environmental Protection Agency
The USEPA is responsible for enforcing the federal Clean Air Act and the 1990 amendments to it,
as well as the national ambient air quality standards (federal standards) that the USEPA
establishes. These standards identify levels of air quality for six criteria pollutants, which are
considered the maximum levels of ambient (background) air pollutants considered safe, with an
adequate margin of safety, to protect public health and welfare. The six criteria pollutants
include O3, CO, NO2, SO2, PM10, and lead. The USEPA also has regulatory and enforcement
jurisdiction over emission sources beyond state waters (outer continental shelf) and sources that
are under the exclusive authority of the federal government, such as aircraft, locomotives, and
interstate trucking.
As part of its enforcement responsibilities, the USEPA requires each state with nonattainment
areas to prepare and submit a State Implementation Plan (SIP) that demonstrates the means to
attain the federal standards. The SIP must integrate federal, state, and local plan components
and regulations to identify specific measures to reduce pollution in nonattainment areas, using a
combination of performance standards and market-based programs.
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STATE
California Air Resources Board
CARB, a department of the California Environmental Protection Agency, oversees air quality
planning and control throughout California. It is primarily responsible for ensuring implementation
of the 1989 amendments to the California Clean Air Act (CCAA), responding to the federal
CAAA requirements, and regulating emissions from motor vehicles and consumer products
within the state. CARB has established emission standards for vehicles sold in California and for
various types of equipment available commercially. It also sets fuel specifications to further
reduce vehicular emissions.
The amendments to the CCAA establish ambient air quality standards for the state (state
standards) and a legal mandate to achieve these standards by the earliest practical date.
These standards apply to the same six criteria pollutants as the federal CAA and also include
sulfate, visibility, hydrogen sulfide, and vinyl chloride. They are more stringent than the federal
standards and, in the case of PM10 and NO2, far more stringent.
Tanner Air Toxics Act
California regulates TACs primarily through the Tanner Air Toxics Act (Tanner Act) and the Air
Toxics Hot Spots Information and Assessment Act of 1987 (AB 2588). The Tanner Act sets forth a
formal procedure for CARB to designate substances as TACs. This includes research, public
participation, and scientific peer review before CARB can designate a substance as a TAC.
Once a TAC is identified, CARB then adopts an Airborne Toxics Control Measure (ATCM) for
sources that emit that particular TAC. If there is a safe threshold for a substance at which there is
no toxic effect, the control measure must reduce exposure below that threshold. If there is no
safe threshold, the measure must incorporate best available control technology (BACT) to
minimize emissions.
Assembly Bill (AB) 2588 requires that existing facilities that emit toxic substances above a
specified level prepare a toxic-emission inventory, prepare a risk assessment if emissions are
significant, notify the public of significant risk levels, and prepare and implement risk reduction
measures. CARB has adopted diesel exhaust control measures and more stringent emission
standards for various on-road mobile sources of emissions, including transit buses and off-road
diesel equipment (e.g., tractors, generators).
Air Quality and Land Use Handbook
As part of its Community Health Program, CARB developed an Air Quality and Land Use
Handbook, which serves as a general reference guide for evaluating and reducing air pollution
impacts associated with new projects that go through the land use decision-making process.
CARB is also developing related information and technical evaluation tools for addressing
cumulative air pollution impacts in a community. Any recommendations or considerations
contained in the handbook are voluntary and do not constitute a requirement or mandate for
either land use agencies or local air districts.
The primary goal in developing this document was to provide information that will help keep
California’s children and other vulnerable populations out of harm’s way with respect to nearby
sources of air pollution. Recent air pollution studies have shown an association between
respiratory and other non-cancer health effects and proximity to high-traffic roadways. Other
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studies have shown that diesel exhaust and other cancer-causing chemicals emitted from cars
and trucks are responsible for much of the overall cancer risk from airborne toxics in California.
The handbook identifies CARB’s recommendations regarding the siting of new sensitive land uses
near freeways, distribution centers, rail yards, ports, refineries, chrome plating facilities, dry
cleaners, and gasoline dispensing facilities. This list consists of the air pollution sources that have
been evaluated from the standpoint of the proximity issue. Table 4.6-5 summarizes CARB’s
recommendations.
TABLE 4.6-5
RECOMMENDATIONS ON SITING NEW SENSITIVE LAND USES NEAR AIR POLLUTANT SOURCES
Source Category Advisory Recommendations
Freeways and High- Avoid siting new sensitive land uses within 500 feet of a freeway, urban roads with 100,000
Traffic Roads vehicles per day, or rural roads with 50,000 vehicles per day.
Avoid siting new sensitive land uses within 1,000 feet of a distribution center (that
accommodates more than 100 trucks per day, more than 40 trucks with operating transport
Distribution Centers refrigeration units (TRUs) per day, or where TRU unit operations exceed 300 hours per week).
Take into account the configuration of existing distribution centers and avoid locating
residences and other new sensitive land uses near entry and exit points.
Avoid siting new sensitive land uses within 1,000 feet of a major service and maintenance rail
Rail Yards yard.
Within one mile of a rail yard, consider possible siting limitations and mitigation approaches.
Avoid siting of new sensitive land uses immediately downwind of ports in the most heavily
Ports impacted zones. Consult local air districts or CARB on the status of pending analyses of health
risks.
Avoid siting new sensitive land uses immediately downwind of petroleum refineries. Consult
Refineries
with local air districts and other local agencies to determine an appropriate separation.
Chrome Platers Avoid siting new sensitive land uses within 1,000 feet of a chrome plater.
Avoid siting new sensitive land uses within 300 feet of any dry cleaning operation. For
operations with two or more machines, provide 500 feet. For operations with 3 or more
Dry Cleaners Using machines, consult with the local air district.
Perchloroethylene
Do not site new sensitive land uses in the same building with perchloroethylene dry cleaning
operations.
Gasoline Avoid siting new sensitive land uses within 300 feet of a large gas station (defined as a facility
Dispensing with a throughput of 3.6 million gallons per year or greater). A 50-foot separation is
Facilities recommended for typical gas dispensing facilities.
Note: Recommendations are advisory, are not site-specific, and may not fully account for future reductions in emissions, including those
resulting from compliance with existing/future regulatory requirements, such as reductions in diesel-exhaust emissions anticipated to
occur with continued implementation of CARB’s Diesel Risk Reduction Plan.
Source: CARB, 2005
Senate Bill 656
In 2003, the California Legislature enacted Senate Bill 656 to reduce public exposure to PM10 and
PM2.5. CARB approved a list of the most readily available, feasible, and cost-effective control
measures that can be employed by air districts to reduce PM10 and PM2.5 (collectively referred to
as PM) in 2004. The list is based on rules, regulations, and programs existing in California as of
January 1, 2004, for stationary, area-wide, and mobile sources. In 2005, air districts adopted
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implementation schedules for selected measures from the list. The implementation schedules
identify the appropriate subset of measures and the dates for final adoption, implementation,
and the sequencing of selected control measures. In developing the implementation schedules,
each air district prioritized measures based on the nature and severity of the PM problem in their
area and cost-effectiveness. Consideration was also given to ongoing programs such as
measures being adopted to meet national air quality standards or the state ozone planning
process.
LOCAL
Butte County Air Quality Management District
In Butte County, the air quality regulating authority is the Butte County Air Quality Management
District (BCAQMD). BCAQMD adopts and enforces controls on stationary sources of air pollutants
through its permit and inspection programs, and it regulates agricultural burning. Other
responsibilities include monitoring air quality, preparing clean air plans, and responding to citizen
complaints concerning air quality.
All projects in Butte County and in the City of Chico are subject to applicable BCAQMD rules
and regulations in effect at the time of construction. Descriptions of specific rules applicable to
future construction resulting from implementation of the proposed General Plan Update may
include, but are not limited to:
Emissions must be prevented from creating a nuisance to surrounding properties as
regulated under BCAQMD Rule 200 Nuisance.
Visible emissions from stationary diesel-powered equipment are not allowed to exceed
40 percent opacity for more than three minutes in any one hour, as regulated under
BCAQMD Rule 201 Visible Emissions.
Fugitive dust emissions must be prevented from being airborne beyond the property line,
as regulated under BCAQMD Rule 205 Fugitive Dust Emissions.
Under BCAQMD Rule 300 General Prohibitions and Exemptions on Open Burning, certain
materials are prohibited from open fires for the purpose of disposing petroleum waste,
demolition debris, construction debris, tires or other rubber materials, materials containing
tar, or for metal salvage or burning of vehicle bodies. Any open burning requires
approval and issuance of a burn permit from BCAQMD and shall be performed in
accordance with the BCAQMD Rule and Regulations.
Portable equipment, other than vehicles, must be registered with either CARB’s Portable
Equipment Registration Program (PERP) or with BCAQMD in accordance with BCAQMD
Rule 440 Portable Equipment Registration.
Architectural coatings and solvents used at the project shall be compliant with BCAQMD
Rule 230 Architectural Coatings.
Cutback and emulsified asphalt application shall be conducted in accordance with
BCAQMD Rule 231 Cutback and Emulsified Asphalt.
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All stationary equipment, other than internal combustion engines less than 50
horsepower, emitting air pollutants controlled under BCAQMD rules and regulations
require an Authority to Construct (ATC) and Permit to Operate (PTO) from the District.
BCAQMD Rule 207 Residential Wood Combustion prohibits installation of any new
traditional “open hearth” type fireplaces or non-USEPA-certified Phase II appliance.
In the event that demolition, renovation, or removal of asbestos-containing materials is
involved, CARB must be contacted.
Air Quality Plans
In 1994, the air districts within the Northern Sacramento Valley Planning Area (NSVPA), a
subsection of the greater Sacramento Valley Air Basin which includes BCAQMD, prepared an Air
Quality Attainment Plan for O3. This plan was updated in 1997, 2000, 2003, and again in 2006. Like
the preceding plans, the 2006 plan focuses on the adoption and implementation of control
measures for stationary sources, area-wide sources, indirect sources, and public information and
education programs. The 2006 plan also addresses the effect that pollutant transport has on the
NSVPA’s ability to meet and attain the state standards. An update to the 2006 plan is
anticipated to be adopted by BCAQMD in 2010 (Williams, 2010).
In 2007, BCAQMD staff ceased work on an 8-hour O3 SIP when the USEPA announced that a new
SIP was not required to meet federal nonattainment area planning requirements. The status
changed as a result of litigation against the USEPA by other entities and because BCAQMD met
the 8-hour standard based on the most current air quality data. Subsequently, the USEPA
established a new 8-hour O3 standard in March 2008. CARB recommended that Butte County be
designated nonattainment for the new standard in March 2009. The USEPA is expected to make
the final area designations by the end of 2010. BCAQMD expects the 8-hour O3 SIP will be due
by 2013 (BCAQMD, 2009).
In December 2009, the USEPA designated the Chico area and much of Butte County as
nonattainment for the new PM2.5 standard. BCAQMD staff expects the PM2.5 SIP to be completed
by 2012 (BCAQMD, 2009).
4.6.3 IMPACTS AND MITIGATION MEASURES
STANDARDS OF SIGNIFICANCE
Per Appendix G of the California Environmental Quality Act (CEQA) Guidelines and BCAQMD
recommendations, air quality impacts are considered significant if implementation of the
proposed project would:
1) Conflict with or obstruct implementation of an applicable air quality plan.
2) Violate any air quality standard or contribute substantially to an existing or projected air
quality violation.
3) Result in a cumulatively considerable net increase of any criteria pollutant for which the
project region is nonattainment under an applicable federal or state ambient air quality
standard (including releasing emissions which exceed quantitative thresholds for ozone
precursors).
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4) Expose sensitive receptors to substantial pollutant concentrations.
5) Create objectionable odors affecting a substantial number of people.
As stated in Appendix G, the significance criteria established by the applicable air quality
management or air pollution control district may be relied upon to make the above
determinations. According to BCAQMD, an air quality impact is considered significant if the
proposed project would violate any ambient air quality standard, contribute substantially to an
existing or projected air quality violation, or expose sensitive receptors to substantial pollutant
concentrations (25 pounds per day of ROG, 25 pounds per day of NOX, or 80 pounds per day of
PM10).
For the evaluation of general plans, BCAQMD recommends that the air quality impacts of the
proposed general plan would be considered significant if:
The plan is inconsistent with the adopted air quality attainment plan (AQAP) and State
Implementation Plan population and vehicle use projections.
The plan does not implement AQAP and SIP transportation control measures.
The plan does not provide buffer zones around sources of odors and TACs.
METHODOLOGY
Air quality impacts were assessed in accordance with methodologies recommended by CARB
and BCAQMD. Where quantification was required, emissions were modeled using the URBEMIS
2007 (v9.2.4) computer program. This program estimates pollutants from area and mobile
emission sources associated with development projects, based on the specific types of land uses
proposed for development. Use of this model for the proposed General Plan Update, where
specific land uses have not yet been identified, may not fully account for site-specific
conditions, but the model has been used to provide a reasonable estimation of emissions based
on typical land use development conditions under the proposed General Plan Update. It is
important to note that the URBEMIS analysis uses the Feather River Air Quality Management
District EMFAC database because a database specific to Butte County is not available. This
approach is considered appropriate by BCAQMD staff (Williams, 2010).
The following proposed General Plan Update policies and actions address air quality-related
impacts:
Policy SUS-3.4 (Sustainable Fleet) – Support sustainable modes of
transportation for City vehicles.
Policy SUS-5.3 (Facilities for Emerging Technologies) – Support the
construction of facilities for emerging transportation
technologies such as alternative fueling stations.
Policy LU-1.2 (Growth Boundaries/Limits) – Maintain long-term boundaries
between urban and agricultural uses in the west and between
urban uses and the foothills in the east, and limit expansion
north and south to produce a compact urban form.
Action LU-1.2.1 (Greenline) – Retain the Greenline.
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Policy LU-2.4 (Land Use Compatibility) – Promote land use compatibility
through use restrictions, development standards, and special
design considerations.
Policy LU-2.6 (Agricultural Buffers) – Require buffering for new urban uses
along the City’s Sphere of Influence adjacent to commercial
crop production. Landscaping, trails, gardens, solar arrays, and
open space uses are permitted within the buffer. Design
criteria for buffers are as follows:
A minimum 100-foot-wide physical separation, which may
include roadways and creeks, between the agricultural use
and any habitable structure.
Incorporate vegetation, as may be needed to provide a
visual, noise, and air quality buffer.
Policy LU-1.3 (Growth Plan) – Maintain balanced growth by encouraging
infill development where City services are in place, and
allowing expansion into Special Planning Areas.
Policy LU-2.3 (Sustainable Land Use Pattern) – Ensure sustainable land use
patterns in both developed areas of the City and new growth
areas.
Action LU-2.3.3 (Encourage Mixed-Use) – Allow horizontal and/or vertical
mixed-uses in the following land use designations:
Residential Mixed Use
Neighborhood Commercial
Commercial Mixed Use
Regional Commercial
Office Mixed Use
Industrial Office Mixed Use
Action LU-2.3.4 (Require Mixed-Use) – Require horizontal or vertical mixed-use
in the following land use designations:
Special Mixed Use
Mixed Use Neighborhood Core
Special Planning Areas (with the exception of the Bell-Muir SPA)
Policy LU-2.6 (Agricultural Buffers) – Require buffering for new urban uses
along the City’s Sphere of Influence adjacent to commercial
crop production. Landscaping, trails, gardens, solar arrays, and
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open space uses are permitted within the buffer. Design
criteria for buffers are as follows:
A minimum 100-foot-wide physical separation, which may
include roadways and creeks, between the agricultural use
and any habitable structure.
Incorporate vegetation, as may be needed to provide a
visual, noise, and air quality buffer.
Policy LU-3.1 (Complete Neighborhoods) – Direct growth into complete
neighborhoods with a land use mix and distribution to reduce
auto trips and support walking, biking, and transit use.
Policy LU-3.2 (Neighborhood Serving Centers) – Promote the development
of strategically located neighborhood serving centers with
commercial, employment or entertainment uses; provide
housing opportunities; are within walking distance of
surrounding residents; and are served by transit. Neighborhood
center designations are Neighborhood Commercial (NC) and
Mixed Use Neighborhood Core (MUNC).
Policy LU-3.4 (Neighborhood Enhancement) – Strengthen the character of
existing residential neighborhoods and districts.
Policy LU-4.1 (Promote Infill and Redevelopment) – Facilitate infill
development through active leadership, education and the
provision of infrastructure and services.
Action LU-4.1.1 (Education about the Benefits of Infill) – Provide community
education regarding the benefits of infill over sprawl through
the neighborhood planning process and in the analysis,
recommendations, and findings for infill development projects
and capital expenditures that support infill and development.
Policy LU-4.2 (Infill Compatibility) – Support infill development,
redevelopment, and rehabilitation projects, which are
compatible with surrounding properties and neighborhoods.
Action LU-4.2.3 (Mix of Dwelling Types) – Allow a mix of dwelling types within all
residential land use designations consistent with density
requirements and applicable design criteria.
Policy LU-5.1 (Opportunity Sites) – Facilitate increased density and intensity
of development and revitalization in the following Opportunity
Sites:
Central City Opportunity Sites – Downtown, South Campus, and
East 8th and 9th Street Corridors.
Corridor Opportunity Sites – North Esplanade, Mangrove Avenue,
Park Avenue, Nord Avenue, and East Avenue.
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September 2010 Draft Environmental Impact Report
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Regional Center Opportunity Sites – North Valley Plaza, East 20th
Street, and Skyway.
Other Opportunity Sites – The Wedge, Vanella Orchard, Pomona
Avenue, and Eaton Road.
Action LU-5.1.1 (Incentives for Opportunity Site Development) – Utilize City
incentives identified in Action LU-2.3.1 to promote infill
development, redevelopment, rehabilitation, and mixed-use
projects in the designated Opportunity Sites.
Action LU-5.1.2 (Midpoint Density and Intensity for Infill) – Require that infill
located within designated Opportunity Sites be developed at
or above the midpoint of the allowable density range or floor
area ratio equivalent unless one or more of the following
findings are made:
The proposed project does not include residential development
because the land use designation does not require (but rather
allows) residential development.
Site considerations such as parcel size, configuration,
environmental resources, or other features make achieving the
density midpoint infeasible or undesirable.
Infrastructure constraints make achieving the density midpoint
impractical.
Action LU-5.1.4 (Streetscape Enhancement) – As part of future roadway
improvement projects in the Corridor Opportunity Sites,
incorporate streetscape enhancements such as bulb-outs,
benches, wide and separated sidewalks, and street trees to
improve the pedestrian environment and serve as a catalyst
for revitalization.
Action LU-6.2.3 (Diamond Match SPA Planning) – Plan the Diamond Match
SPA with a mix of low, medium and high residential densities, a
neighborhood core or commercial mixed-use center, office
and light industrial uses, and parks and open space.
Subsequent planning will:
Address circulation with a focus on extending and improving
existing streets into the site that will distribute traffic on multiple
streets, and improving connectivity to the south in order to reduce
traffic impacts on the existing residential neighborhood.
Incorporate adaptive reuse of existing buildings, where feasible.
Action LU-6.2.4 (Doe Mill/Honey Run SPA Planning) – Plan the Doe Mill/Honey
Run SPA with a broad range of housing types and densities
integrated with significant open space and recreational areas,
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supporting commercial services, and public facilities.
Subsequent planning will:
Address circulation with primary connections to the site via Skyway
and E. 20th Street.
Incorporate significant accessible open space on the eastern
portion of the SPA, a community park, as well as neighborhood
and pocket parks.
Maintain open space by clustering development and providing
open space buffers on the northern, eastern, and southern edges
of the SPA.
Include visual simulations to ensure that development is not visually
intrusive as viewed from lower elevations.
Incorporate special lighting standards to reduce impacts on the
nighttime sky.
Action LU-6.2.5 (North Chico SPA Planning) – Plan the North Chico SPA with a
combination of residential densities and supporting
commercial mixed-use along with industrial and office uses.
Subsequent planning will:
Address the Hicks Lane/Eaton Road/SR 99 intersection and include
an arterial roadway originating at Hicks Lane, extending to State
Route 99.
Address Chico Municipal Airport overflight zone compatibility.
Avoid FEMA-designated flood zones, or incorporate strategies that
allow development to occur in flood zones.
Action LU-6.2.6 (South Entler SPA Planning) – Plan the South Entler SPA with
regional and community commercial uses integrated with
office and industrial uses; a mix of residential densities, and
open space. Subsequent planning will:
Address circulation with a focus on the intersection at Southgate
Avenue and State Route 99 and providing multiple access points
to the site.
Ensure that the SPA serves as a visually attractive “landmark”
gateway at the south end of the City with freeway visibility.
Preserve and/or provide trees along the southern border of the
SPA to provide a buffer to adjacent agricultural uses and open
space.
Policy CIRC-1.8 (Regional Transportation Planning) – Continue to participate in
Butte County Association of Government’s (BCAG) regional
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transportation planning efforts to coordinate priorities with
other jurisdictions, and continue to consult with Caltrans on
transportation planning, operations, and funding to develop
the City’s circulation infrastructure.
Action CIRC-1.8.2 (Sustainable Communities Strategy) – Participate in BCAG’s
effort to prepare the regional Sustainable Communities
Strategy.
Policy CIRC-2.1 (Complete Streets) – Develop an integrated, multimodal
circulation system that accommodates transit, bicycles,
pedestrians, and vehicles; provides opportunities to reduce air
pollution and greenhouse gas emissions; and reinforces the
role of the street as a public space that unites the City.
Action CIRC-2.1.1 (Complete Street Standards) – With consideration of street
classification and function, design new streets to
accommodate all modes of travel, including transit, bicycles,
pedestrians, vehicles, and, where appropriate, parking.
Action CIRC-2.1.2 (Retrofitting Existing Streets) – Retrofit and upgrade existing
streets, as funding allows, to include complete street amenities
where appropriate, prioritizing improvements in locations that
will improve the overall connectivity of the City’s network of
bicycle and pedestrian facilities or result in increased safety.
Action CIRC-2.1.3 (Multimodal Connections) – Provide connections between and
within existing and new neighborhoods for bicycles,
pedestrians, and automobiles.
Policy CIRC-2.2 (Circulation Connectivity and Efficiency) – Provide for greater
street connectivity and efficiency for all transportation modes.
Action CIRC-2.2.1 (Connectivity in Project Review) – New development shall
include the following internal circulation features:
A grid- or modified grid-based street system. Cul-de-sacs are
discouraged, but may be approved in situations where difficult site
planning issues, such as odd lot size, topography, or physical
constraints exist or where their use results in a more efficient use of
land; however in all cases the overall grid pattern of streets should
be maintained;
Traffic-calming measures, where appropriate;
Roundabouts as an alternative intersection control, where
appropriate;
Bicycle and pedestrian connections to adjacent streets, trails,
public spaces, and bicycle paths; and
Short block lengths consistent with City design standards.
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Draft Environmental Impact Report September 2010
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Policy CIRC-3.1 (Bikeway Master Plan) – Implement and update the Chico
Urban Area Bicycle Plan (CUABP) consistent with the goals and
policies of the General Plan.
Action CIRC-3.1.1 (Add Bicycle Facilities) – Incorporate bicycle facilities identified
in the CUABP into public road construction projects and
private development projects.
Action CIRC-3.1.2 (Bicycle Crossings) – Identify and pursue funding to construct
crossings at creeks, railroads, and roadways consistent with the
CUABP to improve bicycle and pedestrian connectivity.
Action CIRC-3.1.3 (Regional Bicycle Trail Coordination) – Consult with Butte
County, Butte County Association of Governments, and other
agencies regarding implementation of a regional bikeway
system.
Action CIRC-3.1.4 (Bikeway Map) – Promote bicycle use by providing an
updated map of Chico’s bikeways to bike stores, CSU Chico,
and other key meeting places for bicyclists.
Policy CIRC-3.2 (CSU Chico Bicycle Access) – Continue to support CSU Chico
planning efforts to reintroduce opportunities for safe bicycle
access into, around and through the main campus area.
Policy CIRC-3.3 (New Development and Bikeway Connections) – Ensure that
new residential and non-residential development projects
provide connections to the nearest bikeways.
Action CIRC-3.3.1 (Bikeway Requirements) – Require pedestrian and bicycle
access to the Citywide bikeway system every 500 feet, where
feasible, as part of project approval and as identified in the
Chico Urban Area Bicycle Plan.
Policy CIRC-3.4 (Bicycle Safety) – Improve safety conditions, efficiency, and
comfort for bicyclists through traffic engineering, maintenance
and law enforcement.
Action CIRC-3.4.1 (Construction and Maintenance) – Continue to ensure that all
new and improved streets have bicycle-safe drainage grates
and are free of hazards such as uneven pavement and gravel.
Maintain a program for the sweeping and repair of bikeways.
Action CIRC-3.4.2 (Signing, Markings, and Lighting) – Continue to provide signage
and markings to warn vehicular traffic of the existence of
merging or crossing bicycle traffic where bikeways make
transitions into or across roadways. Delineate and sign
bikeways in accordance with Caltrans’ standards and install,
where feasible, lighting for safety and comfort.
Action CIRC-3.4.3 (Bike Safety in Schools) – Consult with the Chico Unified School
District, CSU Chico, and Butte College regarding development
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of an educational campaign promoting bicycle safety and
safe routes to school programs.
Action CIRC-3.4.4 (Bicycle Detection at Traffic Signals) – Continue to install
bicycle detector loops at high volume bicycle/automobile
intersections that have actuated signals.
Policy CIRC-3.5 (Funding Bicycle Improvements) – Consider bikeway
improvements when establishing funding priorities for the City
and adopting the Capital Improvement Program.
Action CIRC-3.5.1 (Other Funding Sources) – Continue to pursue funding sources,
including state and federal grants, for new bicycle facilities.
Policy CIRC-3.6 (Bicycle Parking) – Provide adequate bicycle parking and
support facilities.
Action CIRC-3.6.1 (Secure Bicycle Parking and Facilities) – Update the Municipal
Code requirements for bicycle parking, and include, where
appropriate, requirements for bicycle-support facilities, such as
personal lockers and showers.
Policy CIRC-4.1 (Pedestrian Master Planning) – Continue to integrate and
highlight pedestrian access and dual use bicycle and
pedestrian pathways in the Chico Urban Area Bicycle Plan.
Policy CIRC-4.2 (Continuous Network) – Provide a pedestrian network in
existing and new neighborhoods that facilitates convenient
and continuous pedestrian travel free of major impediments
and obstacles.
Action CIRC-4.2.1 (Housing or Destination Connections) – Amend the Municipal
Code to require new subdivisions and large-scale
developments to include safe pedestrian walkways that
provide direct links between streets and major destinations
such as transit stops, schools, parks, shopping centers, and
jobs.
Policy CIRC-4.3 (Pedestrian-Friendly Streets) – Ensure that streets in areas with
high levels of pedestrian activity (such as employment centers,
residential areas, mixed-use areas, and schools) support safe
pedestrian travel by providing elements such as detached
sidewalks, bulb-outs, enhanced pedestrian crossings, and
medians.
Action CIRC-4.3.1 (Safe Pedestrian Crossings) – As funding allows, improve
pedestrian safety at intersections and other crossing locations
by providing safe, well-marked pedestrian crossings, bulb-outs,
audible warnings, or median refuges that reduce crossing
widths.
General Plan EIR City of Chico
Draft Environmental Impact Report September 2010
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