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Vantage to Pomona Heights Chapter 3 230 kV Transmission Line Project FEIS Affected Environment PAGE 3-273 Table 3.13-1 National and State Ambient Air Quality Standards POLLUTANT AVERAGING PERIOD NATIONAL (NAAQS) WASHINGTON STATE (WAAQS) NOTES PRIMARY SECONDARY Ozone (O3) 8-hour 0.075 ppm 0.075 ppm 0.075 ppm 1 1-hour (Daily Maximum) 0.12 ppm 0.12 ppm - 2 Free particles <2.5 microns (PM2.5) Annual (Arithmetic Mean) 15.0 μg/m3 15.0 μg/m3 12.0 μg/m3 3 24-hour 35 μg/m3 35 μg/m3 35 μg/m3 4 Free particles <10 microns (PM10) Annual (Arithmetic Mean) - - 50 μg/m3 5 24-hour 150 μg/m3 150 μg/m3 150 μg/m3 6 Carbon monoxide (CO) 8-hour 9 ppm (10 mg/m3) - 9 ppm (10 mg/m3) 7 1-hour 35 ppm(40 mg/m3) - 35 ppm (40 mg/m3) 7 Nitrogen dioxide (NO2) Annual (Arithmetic Mean) 0.053 ppm 0.053 ppm 0.05 ppb (100 mg/m3) 8 1-hour 100 ppb - 100 ppb 9 Sulfur dioxide (SO2) Annual (Arithmetic Mean) 0.03 ppm - 0.02 ppm 8 24-hour 0.14 ppm - 0.14 ppm 7 3-hour - 0.5 ppm (1300 μg/m3) 0.5 ppm 7 1-hour 75 ppb - 75 ppb 12 Lead (Pb) Rolling 3-month average 0.15 μg/m3 0.15 μg/m3 0.15 μg/m3 11 Quarterly average 1.5 μg/m3 1.5 μg/m3 - - Total suspended particulates (TSP) Annual (Geometric Mean) - - 60 μg/m3 11 24-hour - - 150 μg/m3 7 Source: USEPA 2011; WDOE 2013 1 The 3-year average of the 4th highest daily maximum 8-hour average ozone concentrations measured at each monitor within an area over each year must not exceed 0.075 ppm. 2 Not to be above this level on more than one day in a calendar year. 3 The 3-year average from a community-oriented monitor is not to be above this level. 4 The 3-year average of the annual 98th percentile for each population-oriented monitor within an area is not to be above this level. 5 The 3-year average arithmetic mean concentrations at each monitor within an area is not to be above this level. 6 Not to be exceeded more than once per year on average over three years (NAAQS). Not to be above this level on more than three days over three years with daily sampling (WAAQS). 7 Not to be above this level more than once in a calendar year. 8 Not to be above this level in a calendar year. 9 The 3-year average of the 98th percentile of the daily maximum 1-hour average at each monitor is not to be above this level. 10 Not to be above this level more than twice in a consecutive 7-day period. 11 Not to be above this level. 12 Effective August 23, 2010, the 3-year average of the 99th percentile of the daily maximum 1-hour average at each monitor within an area must not exceed 75 ppb. Section 106 of the CAA and its amendments require that air quality be protected against impacts on visibility in areas of national or regional natural, recreational, scenic or historic value. These areas are designated as Class I areas and are located in eight areas as identified by WDOE. The nearest Class I areas are located in the Mt. Rainier National Park and Goat Rocks Wilderness areas approximately 50 miles to the west of the Project location.