CLIENT's NAME

DUST FALL-OUT MONITORING PROGRAMME

MONTHLY REPORT 13/06 to 17/07/02

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1         Introduction

This report covers a 34-day period in June and July 2002, with two cycles for each DustWatch unit being completed.

2         Climatic Conditions

A total of 53.4 mm of rain fell in this period.  This is a lower rainfall than the previous period that had over 110 mm of rain.

DATE	Location 1	Location 2	Location 3
6/12/02	0.0	1.0	0.0
6/13/02	0.0	0.2	0.4
6/15/02	1.2	0.0	3.4
6/16/02	0.0	0.0	0.2
6/17/02	5.5	4.0	4.0
6/18/02	1.7	0.0	1.0
6/22/02	0.0	1.0	0.2
6/23/02	1.8	0.0	0.8
6/26/02	6.5	11.0	9.0
6/27/02	0.0	2.0	0.8
6/28/02	1.5	6.5	4.4
6/29/02	0.0	5.5	4.2
7/8/02	14.0	15.5	7.4
7/9/02	0.0	0.0	0.4
7/14/02	13.2	10.5	12.8
7/15/02	8.0	7.5	5.2
7/22/02	0.0	0.0	0.2

Table 1:  Rainfall data (Bold values are rain within the period)

3         Comments on the result 

The inside units are:

• ·        G1

• ·        QD!

• ·        M1

• ·        GC

• ·        RWD

• ·        CCRD

The outside units are:

• ·        WF1

• ·        KF1

• ·        4SS

The minimum fall-out dust level in this period was 30.446 mg/m²/day, from the north bucket at the SS unit in the 2^nd cycle.

The maximum fall-out dust level in this period was 427.717 mg/m²/day, from the south bucket at the CCRD unit in the 2^nd cycle.  This is the 2^nd period in a row that this unit has yielded the highest result. 
 

Table 2:  Legal classification of fall-out dust

Studying the DustWatch units north and west of the plant, we note the following:

• The import results at the M1 unit were higher than expected, but the export results are both below 300 mg/m²/day.  These levels are in the moderate dust category.

• The RWD results are all below 160 mg/m²/day

• The GC unit yielded results all below 150 mg/m²/day.

• The SS unit yielded an unexpected high result in the 1^st cycle, from the north bucket, 215.536 mg/m²/day.  All the other results are below 50 mg/m²/day. 

Looking at the other units, we note the following:

• The WF unit’s results have leveled out at the very low level of between 50 and 110 mg/m²/day.

• The results from the K1 unit still indicate agricultural activity because of the brown earthy colour of the dust.  The results are all below 400 mg/m²/day.  We note that this is higher than the other units positioned beyond the boundary of the mine, indicating that the farming activities in the area are loading the bucket.

• The QD results continued to come down with all the results being below 200 mg/m²/day.

• The results at the G1 unit were very low, all below 115 mg/m²/day, with the exception of the north bucket in the second cycle that yielded 303.753 mg/m²/day.  The north bucket reading in the 2^nd cycle is not a concern because it is only in the moderate dust category.

• The CCRD results were quite consistent with each other, and were all below 430 mg/m²/day.

4         Microscopic analysis

As expected more units indicated high pollen counts during this period, and we recommend that workers, who are sensitive to pollens, consider taking preventative measures.