The Air Quality Limit Values (Scotland) Regulations 2003 No. 428

SCHEDULE 5 CRITERIA FOR DETERMINING MINIMUM NUMBERS OF SAMPLING POINTS FOR FIXED MEASUREMENTS OF CONCENTRATIONS OF RELEVANT POLLUTANTS AND OZONE IN AMBIENT AIR

PART I RELEVANT POLLUTANTS: MINIMUM NUMBER OF SAMPLING POINTS FOR FIXED MEASUREMENT TO ASSESS COMPLIANCE WITH LIMIT VALUES FOR THE PROTECTION OF HUMAN HEALTH AND ALERT THRESHOLDS IN ZONES WHERE FIXED MEASUREMENT IS THE SOLE SOURCE OF INFORMATION

Diffuse sources

1.1  

Population of zone (thousands)	If concentrations exceed the upper assessment threshold	If maximum concentrations are between the upper and lower assessment thresholds	For SO2 and NO2 in agglomerations where maximum concentrations are below the lower assessment thresholds
0 –250	1	1	not applicable
250 –499	2	1	1
500 –749	2	1	1
750 –999	3	1	1
1,000 –1,499	4	2	1
1,500 –1,999	5	2	1
2,000 –2,749	6	3	2
2,750 –3,749	7	3	2
3,750 –4,749	8	4	2
4,750 –5,999	9	4	2
>6,000	10	5	3
	For NO2 and particulate matter: to include at least one urban-background station and one traffic-orientated station – this requirement shall also apply to benzene and carbon MONOXIDE provided that it does not increase the number of sampling points.