Territory Stories

Annual Report 2002-2003 National Environment Protection Council



Annual Report 2002-2003 National Environment Protection Council

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Tabled paper 1225


Tabled Papers for 9th Assembly 2001 - 2005; Tabled papers for 9th Assembly 2001 - 2005; Tabled papers; ParliamentNT






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L is t o f Exceedences Station Date Time Pollutant Concentration South East Metro 14 January 2002 N/A PMI0 57.9 pg/m 3 North Metro 23 December 2002 N/A PM, 54.0 pg/m 3 South East Metro 23 December 2002 N/A PM10 82.6 |ig/m 3 D escrip tion of c i r cu m stan ces w hich led to each exceedence 14 January 2002 Pollutant PM | 0 Monitoring site South Lake (DoE) and Fanstone Avenue (Industry) Highest concentration 57.9 ng/m 3 - South Lake 62.8 pg/m 3 - Fanstone Avenue Averaging period 24 hours NEPM standard 50 ng/m 3 Description of event Easterly winds have blown dust over the monitoring stations. The easterly breeze continued throughout the day pushing the dust out to sea. As a result, no other metropolitan station measured elevated particle levels. (Duncraig registered a PM 10 level o f 29.1 pg/m3.) The South Lake nephelometer registered 0.8 bsp (1 -hr averaged). The low nephelometer reading indicates a high proportion o f coarse particles. The wind speed was 8 - 9 ms-1 during the event with no major change in wind direction during the day. Advice from a local Service Station proprietor was that excavation work at a new housing development in Berrigan Drive 500m east o f the South Lake station was the cause. In the case o f Fanstone Avenue, advice from KIC indicates that a small fire was burning in a park 1-2 km NE of Fanstone Avenue site. 150 N a tio n a l E n v iro n m en t P ro te c tio n C o u n cil a n n u a l r e p o r t 2 0 0 2 - 2 0 0 3 24 hour averaged Sout h Lake Fans t one Avenue. I d- J an- 2002 o --------------------------------- - ' ' 0 ) 06 12 18 24 1 hour averaged Sout h Lake Fans t one Avenue. I d- J an- 2002 ~ 3J0 / \ ft t*i <r> \\ / / \l 5 so V ~ 0 06 12 IS 24 Back trajectory to (389.9, 6446.6) (SLAL00) over a period of 120 minutes, ending at 1800 on 14/01/2002

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