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fir' t.J Table 4.6-1 Ambient Air Quality Standards r aCalrfomlaflm EES. _ $ Primary > Secontla; r Pollutant �Concentratton { ) Nst } Ozone ._,. � 0.09 ppm, 1 hr avg Y 0.12 ppm, 1-hr avg 0.12 ppm, 1-hr avg Carbon Monoxide 9 ppm, 8-hr avg 9 ppm, 8-hr avg 9 ppm, 8-hr avg 20 ppm, 1-hr avg 35 ppm, 1-hr avg 35 ppm, 1-hr avg Nitrogen Dioxide 025 ppm, 1-hr avg 100 pg/m3 annual 100 pg/m3 annual Sulfur Dioxide 0.04 ppm, 24-hr avg 0.03 ppm, annual avg 0.5 ppm, 3-hr avg 0.25 ppm, 1-hr avg 0.14 ppm, 24-hr avg Suspended Particulate 30 pg/M3 annual 50 pg/m3 annual 50 pg/m3 annual Matter(PM,,) geometric mean arithmetic mean arithmetic mean 50 pg/M3, 24-hr avg 150 pg/M3, 24-hr avg 150 pglm , 24-hr avg 1.5 pg/m3, 1.5 pg/M3 1.5 pg/m3 Lead 30-day avg calendar quarter calendar quarter Sulfates 25 pg/m3, 24-hr avg — — i Hydrogen Sulfide 0.03 ppm, 1-hr avg -- — Vinyl Chloride 0.01 ppm, 24-hr avg -- — In sufficient amount to -- produce an extinction Visibility Reducing coefficient of 0.23 per Particles kilometer due to particles when the relative humidity is less than 70%. a California standards for ozone, carbon monoxide, sulfur dioxide(1-hour),suspended particulate matter-PM,, ides are values that are not to be exceeded. The sulfur dioxide(24-hour),sulfates, visibility reducing art ( ) Y 9P lead, hydrogen sulfide,and vinyl chloride standards are not to be equaled or exceeded. National standards,other than ozone and those based on annual averages or annual arithmetic means, are not to be exceeded more than once a year. The ozone standard is attained when the expected number of days per calendar year with maximum hourly average concentrations above the standard is equal to or less than one. ppm = parts per million by volume pg/ma =micrograms per cubic meter Source: California Air Resources Board, 1995 Draft Environmental Impact Report 4-64 ER-96-3