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Table 7.2: Summary of PM10 concentrations at ambient monitoring sites in Gisborne and Napier
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| Area | 24-hour maximum | 24-hour 99.5 percentile | Annual average | % of days monitored | Days > 50 µgm-3 | % of winter days guideline was exceeded |
|---|---|---|---|---|---|---|
|
Gisborne (Oates Road) 1993 |
35 |
35 |
n/a |
11% |
0 |
0 |
|
Gisborne (Oates Road) 1994 |
24 |
24 |
9 |
15% |
0 |
0 |
|
Gisborne (Oates Road) 1995 |
20 |
19 |
8 |
16% |
0 |
0 |
|
Gisborne (Oates Road) 1996 |
25 |
25 |
9 |
15% |
0 |
0 |
|
Gisborne (Oates Road) 1997 |
26 |
25 |
9 |
15% |
0 |
0 |
|
Gisborne (Oates Road) 1998 |
70 |
61 |
12 |
15% |
1 measured |
Exceedence occurred during summer |
|
Gisborne (Oates Road) 2000 |
16 |
16 |
n/a |
10 |
0 |
0 |
|
Napier (Guppy Road) 1998 |
24 |
23 |
n/a |
10% |
0 |
0 |
|
Napier (Guppy Road) 1999 |
17 |
17 |
n/a |
6% |
0 |
0 |
|
Napier (Nelson Park) 2000 |
64 |
64 |
n/a |
7% |
2 measured 15 equivalent* |
13% |
|
Napier (Nelson Park) 2001 |
33 |
33 |
n/a |
7% |
0 |
0 |
Note: Guideline value exceedences are highlighted in bold.
* This is an estimate of the number of days PM10 concentrations may have exceeded the guideline value if monitoring had been carried out on all days during winter (May to August inclusive). It is extrapolated from the number of measured exceedences and the number of days when monitoring did occur.
