Table 5.1

Site Quarter 1 Quarter 2 Quarter 3 Quarter 4

1 17.21 ug/m3 16.34 20.30 14.76

2 15.39 17.98 18.23 13.76

(3) The area has 1 urban speciation site which is co-located with FRM site 2. The speciation

data is only available for 2003 and 2004. Therefore, the species data for the two years has been

interpolated to derive estimated species concentrations at each site. The species concentrations

(derived from 2003 and 2004 data) are matched up with FRM data for 2003 and 2004 to derive

representative species fractions.

Average monitored air quality for the 3rd quarter of 2003 and 2004 at site 1 is as follows45:

The blank mass is subtracted before species fractions are calculated because the blank mass is

held constant at 0.5 ug/m3 throughout the analysis. In the example, the measured FRM mass for

quarter 3 is 22.57 ug/m3. The non-blank FRM mass is 22.07 ug/m3. The mass of the seven

45The species concentrations can be derived from co-located speciation data, nearby

speciation data or from interpolated spatial fields. In this example, FRM mass is not

interpolated.

 

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