ANNEX XILIMIT VALUES FOR THE PROTECTION OF HUMAN HEALTH

A.Criteria

Without prejudice to Annex I, the following criteria shall be used for checking validity when aggregating data and calculating statistical parameters:

Parameter

Required proportion of valid data

One hour values

75 % (i.e. 45 minutes)

Eight hours values

75 % of values (i.e. 6 hours)

Maximum daily 8-hour mean

75 % of the hourly running eight hour averages (i.e. 18 eight hour averages per day)

24-hour values

75 % of the hourly averages (i.e. at least 18 hour values)

Annual mean

90 %36 of the one hour values or (if not available) 24-hour values over the year

The requirements for the calculation of annual mean do not include losses of data due to the regular calibration or the normal maintenance of the instrumentation.

B.Limit values

Averaging Period

Limit value

Margin of tolerance

Date by which limit value is to be met

Sulphur dioxide

One hour

350 µg/m3, not to be exceeded more than 24 times a calendar year

150 µg/m3 (43 %)

37

One day

125 µg/m3, not to be exceeded more than 3 times a calendar year

None

37

Nitrogen dioxide

One hour

200 µg/m3, not to be exceeded more than 18 times a calendar year

50 % on 19 July 1999, decreasing on 1 January 2001 and every 12 months thereafter by equal annual percentages to reach 0 % by 1 January 2010

1 January 2010

Calendar year

40 µg/m3

50 % on 19 July 1999, decreasing on 1 January 2001 and every 12 months thereafter by equal annual percentages to reach 0 % by 1 January 2010

1 January 2010

Benzene

Calendar year

5 µg/m3

5 µg/m3 (100 %) on 13 December 2000, decreasing on 1 January 2006 and every 12 months thereafter by 1 µg/m3 to reach 0 % by 1 January 2010

1 January 2010

Carbon monoxide

maximum daily eight hour mean38

10 mg/m3

60 %

37

Lead

Calendar year

0,5 µg/m339

100 %

39

PM10

One day

50 µg/m3, not to be exceeded more than 35 times a calendar year

50 %

37

Calendar year

40 µg/m3

20 %

37

Already in force since 1 January 2005

The maximum daily eight hour mean concentration will be selected by examining eight hour running averages, calculated from hourly data and updated each hour. Each eight hour average so calculated will be assigned to the day on which it ends i.e. the first calculation period for any one day will be the period from 17:00 on the previous day to 01:00 on that day; the last calculation period for any one day will be the period from 16:00 to 24:00 on that day.

Already in force since 1 January 2005. Limit value to be met only by 1 January 2010 in the immediate vicinity of the specific industrial sources situated on sites contaminated by decades of industrial activities. In such cases, the limit value until 1 January 2010 will be 1,0 µg/m3. The area in which higher limit values apply must not extend further than 1 000 m from such specific sources.