COMPONENT Lead in PM10 aerosol, variable STATION DEMV004 20090101 00:00, 20090131 23:00, 29.000 , 1 20090201 00:00, 20090228 23:00, 19.000 , 1 20090301 00:00, 20090331 23:00, 6.000 , 1 20090401 00:00, 20090430 23:00, 6.000 , 1 20090501 00:00, 20090531 23:00, 2.000 , 1 20090601 00:00, 20090630 23:00, 2.000 , 1 20090701 00:00, 20090731 23:00, 2.000 , 1 20090801 00:00, 20090831 23:00, 4.000 , 1 20090901 00:00, 20090930 23:00, 3.000 , 1 20091001 00:00, 20091031 23:00, 5.000 , 1 20091101 00:00, 20091130 23:00, 8.000 , 1 20091201 00:00, 20091231 23:00, 7.000 , 1 STATION DEMV006 20090101 00:00, 20090131 23:00, 13.000 , 1 20090201 00:00, 20090228 23:00, 7.000 , 1 20090301 00:00, 20090331 23:00, 11.000 , 1 20090401 00:00, 20090430 23:00, 9.000 , 1 20090501 00:00, 20090531 23:00, 2.000 , 1 20090601 00:00, 20090630 23:00, 2.000 , 1 20090701 00:00, 20090731 23:00, 3.000 , 1 20090801 00:00, 20090831 23:00, 4.000 , 1 20090901 00:00, 20090930 23:00, 4.000 , 1 20091001 00:00, 20091031 23:00, 11.000 , 1 20091101 00:00, 20091130 23:00, 16.000 , 1 20091201 00:00, 20091231 23:00, 13.000 , 1 STATION DEMV022 20090101 00:00, 20090131 23:00, 7.000 , 1 20090201 00:00, 20090228 23:00, 5.000 , 1 20090301 00:00, 20090331 23:00, 7.000 , 1 20090401 00:00, 20090430 23:00, 8.000 , 1 20090501 00:00, 20090531 23:00, 3.000 , 1 20090601 00:00, 20090630 23:00, 2.000 , 1 20090701 00:00, 20090731 23:00, 3.000 , 1 20090801 00:00, 20090831 23:00, 5.000 , 1 20090901 00:00, 20090930 23:00, 4.000 , 1 20091001 00:00, 20091031 23:00, 6.000 , 1 20091101 00:00, 20091130 23:00, 11.000 , 1 20091201 00:00, 20091231 23:00, 7.000 , 1