Introduction to Air Quality ATCEM November 6, 2012 Pat Ellsworth Institute for Tribal Environmental Professionals 1

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Step-by-Step Calculation of PM 10 Concentration 1. Calculate particulate weight (in grams) as follows: final weight of dry filter-initial weight of dry filter =particulate weight __________ grams-__________ grams =__________ grams 2. Calculate total time sampler was running (in minutes): __________ hours runx60 minutes =__________ minutes 1 hour 3. Calculate average flow rate for the sampling period: initial flow meter rate + final flow meter rate =__________liters/min 2 4. Calculate volume of air sampled (in liters): average flow rate xtime= volume sampled _______ litersx _______ minutes = __________ liters 1 minute 5

Step-by-Step Calculation of PM 10 Concentration (continued) 5. Convert particulate weight from grams to micrograms: __________ gramsx 1 x 10 6 µg= ___________ µg 1 1 gram 6. Convert volume of air sampled from liters to cubic meters: __________ litersx 1 m 3 = ___________ m x 10 3 liters 7. Divide particulate weight (µg) by volume of air sampled (m 3 ). Report average particulate concentration as: __________ µg/m 3 6

National Ambient Air Quality Standards PollutantPrimary StandardsSecondary Standards LevelAveraging TimeLevelAveraging Time Carbon Monoxide (CO)9 ppm8-hourNone 35 ppm1-hourNone Lead (Pb)0.15 µg/m 3 3-MonthSame as Primary Nitrogen Dioxide (NO2)53 ppbAnnualSame as Primary 100 ppb1-hourNone Particulate Matter (PM10)150 µg/m 3 24-hourSame as Primary RevokedAnnual Particulate Matter (PM2.5)15.0 µg/m 3 AnnualSame as Primary 35 µg/m 3 24-hourSame as Primary Ozone (O3)0.075 ppm8-hourSame as Primary Sulfur Dioxide (SO2)0.075 ppm1-hour0.5 ppm3-hour 7