Table 4: Correction factors to estimate secondary PM₁₀ concentration in future years from 1996 mapped data

Year	Correction factor to be applied
1996	1.000
1997	0.979
1998	0.957
1999	0.936
2000	0.914
2001	0.893
2002	0.871
2003	0.850
2004	0.829

Example: If the estimated secondary PM₁₀ concentration for 1996 is 11 ug/m3 (derived from the Internet map), the secondary PM₁₀ concentration in 1998 is predicted to be 11 x 0.957 = 10.5 mg/m³ .

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