Monitoring dates: May 2006 to May 2007.

Air toxics monitored: Benzene, toluene and xylene.

Sampling frequency: 24-hour samples once every six days.

Number of samples analysed: Benzene, toluene and xylene – 58

Location: Corner of Napier Street and Kings Way, South Melbourne.

Results of monitoring

We monitored benzene, toluene and xylene in a residential area near a busy road.

The primary focus of this study was to monitor air toxics levels in an inner-city site impacted by high traffic numbers.

Concentrations of all air toxics monitored were below the health-based monitoring investigation levels.

24-hour results

Sample date	Benzene (ppb)	Toluene (ppb)	Xylene (ppb)
Annual investigation level	3.0	100.0	200.0
24 hour investigation level	Not applicable	1000.0	250.0
Annual average	0.5	1.6	0.5
Maximum 24 hour level	Not applicable	5.1	2.4
21-May-06	0.9	2.4	1.1
27-May-06	1.1	3.5	1.8
02-Jun-06	0.5	1.7	0.7
08-Jun-06	0.8	2.3	0.9
14-Jun-06	0.9	3.7	1.4
20-Jun-06	1.4	5.1	2.4
26-Jun-06	0.7	1.8	0.6
02-Jul-06	0.3	0.4	0.2
08-Jul-06	Not sampled	Not sampled	Not sampled
14-Jul-06	1.3	4.6	2.0
20-Jul-06	1.0	4.2	1.8
26-Jul-06	Not sampled	Not sampled	Not sampled
01-Aug-06	0.6	1.6	0.6
07-Aug-06	Not sampled	Not sampled	Not sampled
13-Aug-06	0.5	1.1	0.4
19-Aug-06	0.6	2.0	0.7
25-Aug-06	Not detected	0.6	0.2
31-Aug-06	0.8	3.2	1.1
06-Sep-06	0.3	0.8	0.3
12-Sep-06	0.7	3.0	0.9
18-Sep-06	0.6	2.4	0.7
24-Sep-06	0.3	0.8	0.2
30-Sep-06	0.5	1.5	0.7
06-Oct-06	0.3	0.9	0.2
12-Oct-06	0.6	1.9	0.5
18-Oct-06	0.3	0.7	0.2
24-Oct-06	0.8	3.3	1.0
30-Oct-06	0.3	0.9	0.3
05-Nov-06	Not detected	0.3	Not detected
11-Nov-06	0.3	0.8	0.3
17-Nov-06	0.3	0.8	0.3
23-Nov-06	Not detected	0.7	0.2
29-Nov-06	Not detected	0.3	Not detected
05-Dec-06	0.6	2.0	0.6
11-Dec-06	Not detected	0.4	Not detected
17-Dec-06	0.5	1.6	Not detected
23-Dec-06	0.3	0.6	0.2
29-Dec-06	Not detected	0.2	Not detected
04-Jan-07	0.4	1.2	0.3
10-Jan-07	0.6	1.6	0.4
16-Jan-07	0.5	1.9	0.4
22-Jan-07	Not detected	0.3	Not detected
28-Jan-07	0.3	1.2	0.3
03-Feb-07	0.5	1.5	0.3
09-Feb-07	0.3	1.2	0.3
15-Feb-07	0.5	1.5	0.3
21-Feb-07	Not detected	0.7	0.2
27-Feb-07	Not detected	Not detected	Not detected
05-Mar-07	Not detected	0.3	Not detected
11-Mar-07	Not detected	0.5	Not detected
17-Mar-07	Not detected	0.4	Not detected
23-Mar-07	0.5	1.6	0.5
29-Mar-07	0.6	2.0	0.6
04-Apr-07	0.3	1.0	0.3
10-Apr-07	0.9	3.3	1.0
16-Apr-07	Not detected	0.3	Not detected
22-Apr-07	0.3	0.9	0.3
28-Apr-07	0.5	1.8	0.5
04-May-07	0.6	1.8	0.5
10-May-07	0.5	2.5	0.8
16-May-07	0.6	2.3	0.7
22-May-07	0.6	2.0	0.6

Not applicable: A 24-hour investigation level is not specified for benzene.
Not detected: Air toxic was below measurable levels.
Not sampled: No result is available due to sampling failure or error.
ppb: parts per billion (for every one billion litres of air there is one litre of the pollutant).

Detection limits are as follows:

Compound	Benzene (ppb)	Toluene (ppb)	Xylene (ppb)
Detection limit	0.3	0.2	0.2