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3.0 ENVIRONMENTAL CHECKLIST <br />the summer average in the mid-70s, with minimums in the mid-50s. Winter highs are in the mid to <br />high 50s, with lows in the low to mid 40s. <br />The air pollution potential is lowest for the parts of the subregion that are closest to the bay, largely <br />due to good ventilation and less influx of pollutants from upwind sources. The occurrence of light <br />winds in the evenings and early mornings occasionally causes elevated pollutant levels. The air <br />pollution potential at the northern (Richmond) and southern (Oakland, San Leandro) parts of this <br />subregion is marginally higher than in communities directly east of the Golden Gate because of <br />the lower frequency of strong winds. <br />This subregion contains a variety of industrial air pollution sources. Some industries are quite close <br />to residential areas. The subregion is also traversed by frequently congested major highways, a <br />significant source of air pollutants (BAAQMD 2017a). <br />Air Pollutants of Concern <br />Criteria Air Pollutants <br />The air pollutants emitted into the ambient air by stationary and mobile sources are regulated by <br />federal and state laws. These regulated air pollutants are known as criteria air pollutants and are <br />categorized into primary and secondary pollutants. Primary air pollutants are those that are <br />emitted directly from sources. Carbon monoxide (CO), reactive organic gases (ROG), nitrogen <br />oxide (NOx), sulfur dioxide (S02), coarse particulate matter (PMio), fine particulate matter (PM2.5), <br />lead, and fugitive dust are primary air pollutants. Of these, CO, S02, PM,o, and PM2.5 are criteria <br />pollutants. ROG and NOx are criteria pollutant precursors and go on to form secondary criteria <br />pollutants through chemical and photochemical reactions in the atmosphere. Ozone (03) and <br />nitrogen dioxide (NO2) are the principal secondary pollutants. <br />Common sources and health effects of criteria air pollutants are summarized in Table 3.3-1. <br />TABLE 3.3-1 <br />CRITERIA AIR POLLUTANTS — SUMMARY OF COMMON SOURCES AND EFFECTS <br />Pollutant <br />Major Man -Made Sources <br />Human Health & Welfare Effects <br />An odorless, colorless gas formed when carbon <br />Reduces the ability of blood to deliver oxygen to <br />Carbon <br />in fuel is not burned completely; a component <br />vital tissues, effecting the cardiovascular and <br />Monoxide (CO) <br />of motor vehicle exhaust. <br />nervous system. Impairs vision, causes dizziness, <br />and can lead to unconsciousness or death. <br />Respiratory irritant; aggravates lung and heart <br />Nitrogen <br />A reddish -brown gas formed during fuel <br />problems. Precursor to ozone and acid rain. <br />Dioxide (NO2) <br />combustion for motor vehicles, energy utilities <br />Contributes to nutrient overloading which <br />and industrial sources. <br />deteriorates water quality. Causes brown <br />discoloration of the atmosphere. <br />Formed by a chemical reaction between <br />Irritates and causes inflammation of the mucous <br />reactive organic gases (ROGs) and nitrous <br />membranes and lung airways; causes wheezing, <br />Ozone (03) <br />oxides (NOx) in the presence of sunlight. <br />coughing and pain when inhaling deeply; <br />Common sources of these precursor pollutants <br />decreases lung capacity; aggravates lung and <br />include motor vehicle exhaust, industrial <br />heart problems. Damages plants; reduces crop <br />emissions, solvents, paints and landfills. <br />yield. <br />1388 Bancroft Avenue Project City of San Leandro <br />Initial Study/Mitigated Negative Declaration November 2018 <br />3.0-8 <br />