 Equivalent
#&gt; 45   pollutantID         100           Primary Exhaust PM10 - Total
#&gt; 46   pollutantID         101          Primary PM10 - Organic Carbon
#&gt; 47   pollutantID         102        Primary PM10 - Elemental Carbon
#&gt; 48   pollutantID         105     Primary PM10 - Sulfate Particulate
#&gt; 49   pollutantID         106  Primary PM10 -  Brakewear Particulate
#&gt; 50   pollutantID         107   Primary PM10 -  Tirewear Particulate
#&gt; 51   pollutantID         110          Primary Exha