Laserfiche WebLink
5.1 AIR QUALITY <br /> TABLE 5.1-2 <br /> Ambient Air Quality Standards <br /> Pollutant Averaging Time California National <br /> Ozone 1 hour 0.09 ppm — <br /> 8 hours 0.070 ppm 0.075 ppm <br /> Carbon Monoxide 8 hours 9 ppm 9 ppm <br /> 1 hour 20 ppm 35 ppm <br /> Nitrogen Dioxide Annual Average 0.030 ppm 0.053 ppm <br /> 1 hour 0.18 ppm — <br /> Sulfur Dioxide Annual Average — 0.03 ppm (80 Ng/m3) <br /> 24 hours 0.04 ppm (105 tag/m3) 0.14 ppm (365 lag/m3) <br /> 3 hours — 0.5 ppm (1300 ug/m3)* <br /> 1 hour 0.25 ppm (655 tag/m3) — <br /> Suspended Particulate 24 hours 50 lag/m3 150 Ng/m3 <br /> Matter(10 Micron) <br /> Annual Arithmetic Mean 20 ug/m3 — <br /> Suspended Particulate Annual Arithmetic Mean 12 lag/m3 15 Ng/m3 <br /> Matter(2.5 Micron) (3-year average) <br /> 24 hours none 35 tag/m3 <br /> (3-year average <br /> of 98th percentiles) <br /> Sulfates 24 hours 25 lag/m3 — <br /> Lead 30 days 1.5 tag/m3 — <br /> Calendar Quarter — 1.5 Ng/m3 <br /> Hydrogen Sulfide 1 hour 0.03 ppm — <br /> Vinyl Chloride 24 hours 0.01 ppm — <br /> Visibility Reducing 8 hours In sufficient amount to — <br /> Particles (10 a.m.to 6 p.m. PST) produce an extinction <br /> coefficient of 0.23 per <br /> kilometer due to particles <br /> when the relative humidity is <br /> less than 70 percent. <br /> *This is a national secondary standard,which is designed to protect public welfare. <br /> ppm= parts per million <br /> Pg/M3= micrograms per cubic meter <br /> 5.1.1.3.2 Ambient Monitoring Stations <br /> Data from two ambient air monitoring stations were used to characterize air quality at the <br /> project site. They were chosen because of their proximity to the site and because they record <br /> area-wide ambient conditions rather than the localized impacts of any particular facility. All <br /> ambient air quality data presented in this section were taken from CARB publications and data <br /> sources or EPA air quality data tables. Ambient concentrations of ozone,carbon monoxide <br /> (CO),nitrogen dioxide (NO2), respirable particulate matter (PM1o),fine particulate matter <br /> (PM2.5), sulfates, and lead are recorded at the Hazelton Avenue monitoring station in Stockton, <br /> SAC/371322/082410013(LEC_5.1_AIR_QUALITY.DOC) 5.1-7 <br />