2008 01 january

sulphur dioxide
the latest update
alcoa anglesea
2008
environment report
january
ANGLESEA ENVIRONMENT REPORT JANUARY 2008
air
Air Monitoring
Stack Monitors
Average
Maximum
Opacity g/m3 10-minute average
0.064
0.204
Stack SO2 kg/min 1-hour average Licence limit 111.34kg/min 63.41
84.20
Ambient Monitors
SO2 1 hour ppb
Average
Maximum
Community Centre
0
3
Primary School
1
166
Mt Ingoldsby
1
26
Scout Camp
0
15
Camp Wilkin
1
120
Camp Road
1
129
Ambient Monitors
SO2 Maximum 1 hour averages (ppb)
Date
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Community Centre 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0
Primary School
6
0
0
2
11 5
1
0
0 101166 0
0
0
2
0
0
1
1
1
1
3
4
0
1
1
10 1
0
1
0
Mt Ingoldsby
9
0
1
0
26 2
0
0
2
3
5
3
2
6
5
3
4
6
2
6
6
5
1
5
3
3
20 0
3
4
3
Scout Camp
0
0
0
2
14 4
0
0
0
4
11 0
7
0
2
0
0
1
2
1
1
4
1
0
0
1
15 0
0
1
0
Camp Wilkin
3
0
0
1
5
5
1
1
1
20 2
0
0
0
2
1
0
1
1
1
0
2
1
0
0
1
13 1
0
1
1
Camp Road
4
0
0
1
81 1
0
0
0
16 129 0
0
0
1
0
0
1
0
0
1
3
1
0
0
0
1
0
1
0
EPA Intervention Level
210
Alcoa Local Standard
170
0
ANGLESEA ENVIRONMENT REPORT JANUARY 2008
water
Water Storage
Barwon Water storage levels for the Geelong system at 32.3% capacity. Stage 4 restrictions apply with a
Daylight Savings exemption to permit limited residential garden watering.
Water Discharge
ML
January
Total
Ashponds (SP1)
144
144
Mine (SP4)
0
0
Water Monitoring
SP1
SP4
SP3
16/01/2008
Ashpond
Mine
Final
EPA limit
Lab Result
EPA limit
Lab Result
EPA limit
Lab Result
pH
4-10
8.4
3-9
-
5-9
6.9
Susp. Solids
100
<4
100
-
30
<4
Colour
50
4
50
-
50
4
Aluminium
10.00
0.24
10
-
5.50
0.13
Iron
10.00
0.23
0
-
4.00
0.16
Zinc
0.40
0.02
2.0
-
0.30
0.04
WATER WATER USAGE PER MONTH (ML)
Date
JAN
Town Water
1.4
1.4
Bore Water
279
279
Mine Water
53
53
FEB MAR APR
MAY JUNE JULY AUG
SEPT OCT
NOV
DEC
TOTAL
3 0 0 .0
3000
2 5 0 .0
2500
2 0 0 .0
2000
1 5 0 .0
1500
1 0 0 .0
1000
5 0 .0
0 .0
500
0
ANGLESEA ENVIRONMENT REPORT JANUARY 2008
sulphur dioxide
The investigation of management options for
Alcoa Anglesea’s sulphur dioxide (SO2) ground
level concentrations has been an ongoing issue for
some time. In previous communications we have
reviewed options for improved management of
ground level concentrations of SO2 above
200ppb detected by one of our six monitoring
stations around the Anglesea township. Whilst we
have at all times been in compliance with the Stack
SO2 discharge limit, one of the requirements of the
new EPA licence was to submit a Sulphur Dioxide
Management Plan in the latter half of 2007 to the
local EPA to address ground level concentrations.
This plan outlined our commitment to current
practices such as reducing power station
generation during high risk times and to investigate
specific options further. Among the 25 plus
technical solutions reviewed, the option of
scrubbing is currently being pursued via the Front
End Loading (FEL3) engineering study. This study
is a highly detailed phase of the project design,
which will be led by Alcoa with the help of Hatch
Engineering. The project will commence in the first
week of February and is due for completion in the
later stages of this year.
Along with the engineering study into the
scrubbing solution, an increased community
consultation program is required by the EPA to
ensure the community are well informed of our
current management practices, performance and
ongoing investigations. In the interim, work is
progressing with the consultancy group Environ,
to understand if a predictive modelling tool using
climatic conditions, that is currently in operation in
Kalgoorlie, will be a good fit for our operations
here in Anglesea. We have also been running
information sharing sessions with our control room
employees to understand what further
improvements we can make to ensure we achieve
zero non-compliance for 2008.
ANIMALS OF THE ANGLESEA HEATH
RASPY CRICKET (Apotrechus unicolor)
Size:
Distribution:
Habitat:
Up to 5 cm
Victoria
forests and woodlands, heath
The Raspy Cricket belongs to the invertebrate Order
Orthoptera from the Greek orthos = straight and pteron =
wing. Grasshoppers, crickets, katydids and locusts all
belong to this order.
Orthopterans are easily recognisable by their hind legs,
which are usually enlarged for jumping. They are often easily
seen jumping away when disturbed. Many can produce
sound by rubbing their legs, wings or abdomen together. It
is predominantly males that produce these sounds to
attract females.
As with many groups of invertebrates there isn’t a lot of
information on individual species. This is due to the large
number of invertebrates - there are about 3000 species in
Australia in the Orthoptera order alone.
RASPY CRICKET
ANGLESEA ENVIRONMENT REPORT JANUARY 2008
LAND
RAINFALL (mm)
Month
JAN
2008 Rainfall
19.8
19.8
1968-2007 Average
44.5
44.5
FEB MAR APR
MAY JUNE JULY AUG
SEPT OCT
NOV
DEC
TOTAL
7 00.00
130
120
6 00.00
110
100
5 00.00
90
80
4 00.00
70
60
3 00.00
50
40
2 00.00
30
20
1 00.00
10
0
0 .0 0
WATER
TOWN WATER USE (ML)
2000 2007 2008 JAN
Process
23.9
12.8
1.3
1.3
Amenity
11.6
1.5
0.1
0.1
FEB
MAR APR
MAY
JUN
JUL
AUG SEP
OCT
NOV
DEC
4 0 .0
2 .0
1 .8
3 5 .0
1 .6
3 0 .0
1 .4
2 5 .0
1 .2
1 .0
2 0 .0
0 .8
1 5 .0
0 .6
1 0 .0
0 .4
5 .0
0 .2
0 .0
0 .0
2 0 0 0
2 0 0 7
2 0 0 8
JA N
F E B
M A R
A P R
M A Y
JU N
JU L
A U G
S E P
O C T
N O V
D E C
AIR
GREENHOUSE GAS (GHG) TOTAL (Mt) & GHG EMISSION EFFICENCY (t/MWh)
GHG Mt
‹ GHG
t/MWh
1990
2000
2001
2002
2003
2004
2005
2006
2007
2008
1.42
1.23
1.27
1.50
1.45
1.47
1.31
1.49
1.40
1.38
1.34
1.24
1.19
1.21
1.21
1.20
1.21
1.20
1.18
1.17
2
1600000
1 .8
1400000
1 .6
1 .4
1 .2
1200000
1000000
1
800000
0 .8
600000
0 .6
400000
0 .4
0 .2
0
200000
0
ANGLESEA ENVIRONMENT REPORT JANUARY 2008
environmental improvement
Environmental Management Targets
January
2008 Total
Forecast
2008 Target
Reportable Environmental Incidents
0
0
0
0
Monthly EHS ASAT Audit Completion (%)
100
100
100
90
Air Emission Targets
January
2008 Total
Forecast
2008 Target
Ambient SO2 ( no. readings > 210ppb)
0
0
0
0
Stack SO2 (no. hrs > 100kg/min)
0
0
0
0
SO2 Load Reductions (lost MWh)
7.5
7.5
90
N/A
GHG Efficiency (t CO2 e/MWh)
1.17
1.17
1.17
1.20
Opacity (10 min av > 0.25g/m normal operation)
0
0
0
0
Water Targets
January
2008 Total
Forecast
2008 Target
Town Water (ML)
1.4
1.4
16.8
14.2
Bore Water (ML)
279
279
3348
2370
Waste Targets
January
2008 Total
Forecast
2008 Target
Waste to Landfill (t)
0.0
0.0
0.0
8.0
Solid Prescribed Waste to Landfill (t)
0.0
0.0
0.0
0.0
3
Mine Rehabilitation Targets
2008 Total
2008 Target
2008 Area to Clear (ha)
0.0
0.0
2008 Area to Rehabilitate (ha)
0.0
0.0
2007 Mine Rehabilitation Species Richness (%)
N/A
100
OUR ENVIRONMENT AND OUR EMPLOYEE
Greg, what is your role at Anglesea?
I am the Staff Engineer at the Anglesea Power Station
incorporating engineering management, leading major projects
and operations/maintenance support. One of my major roles this
year is to lead engineering in FEL Stage Three which looks at
accurately defining and costing the SO2 scrubbing technology for
Anglesea Power Station. I am the Alcoa representative on an
internationally-based (Toronto), Australia-wide and site-wide team.
Where are we at with the SO2 scrubbing and what are the
next steps?
Right now we have just kicked off Stage 3 with an expected
completion date of October this year. Following on from Stage 3
we need to do a rigorous business review which may lead to
implementation starting in 2009.
What other environmental initatives have you been involved
with?
I have provided engineering support to water-use reduction
projects, auxiliary energy-use minimisation, researching clean
coal technologies and improving overall plant efficiency.
...GREG HOLLETT
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