200705

grass tree manoeuvres
a transplant of a different kind
alcoa anglesea
2007
environment report
may
ANGLESEA ENVIRONMENT REPOR
T MAY 2007
REPORT
air
Air Monitoring
Stack Monitors
Average
Maximum
Opacity g/m3 10-minute average
0.060
0.210
Stack SO2 kg/min 1-hour average Licence limit 111.34kg/min 65.49
78.02
Ambient Monitors
SO2 1 hour ppb
Average
Maximum
Community Centre
3
143
Primary School
5
144
Mt Ingoldsby
1
36
Scout Camp
9
133
Camp Wilkin
3
202
Camp Road
9
159
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 21 118 12 4 1 2 23 2 2 2 1 3 3 7 2 55 9 2 2 43 143 9 8 17 3 2 Primary School
48 97 144 2
27 0
58 4
0
0
0
34 22 43 0
29 0
Mt Ingoldsby
-
-
0
2
1
1
3
36 2
16 2
Scout Camp
5
63 53 11 20 59 10 34 11 2
2
7
7
Camp Wilkin
Camp Road
EPA Intervention Level
210
EPA Air Quality Objective
200
Alcoa Local Standard
170
-
119132 3
-
-
-
1
0
1
1
5
-
3
-
-
-
-
-
0
5
63 135 44 39 125127
0
18 0
0
0
0
0
0
0
-
-
0
0
0
2
3
2 117131125111 90 11 103 0
1
1
5 133 25
1
1
1
1
1
1
1
64 2
57 1
15 57 1
1
1
-
-
3
4
-
-
-
-
-
-
3
5
55 86 70 76 159120 93 36 2
1
-
0
0
-
-
1
1
1
1
1
3
1
1
0
22 9 202 2
0
2
21 92 37
ANGLESEA ENVIRONMENT REPOR
T MAY 2007
REPORT
water
Water Storage
Barwon Water storage levels for the Geelong system at 14.7% capacity. Stage 4 restrictions apply.
Water Discharge
ML
May
Total
Ashponds (SP1)
131
701
Mine (SP4)
0
0
Water Monitoring
SP1
SP4
SP3
14/05/2007
Ashpond
Mine
Final
EPA limit
Lab Result
EPA limit
Lab Result
EPA limit
Lab Result
pH
4-10
8.2
3-9
-
5-9
7.3
Susp. Solids
100
3
100
-
30
<2
Colour
50
4
50
-
50
4
Aluminium
10.00
0.17
10
-
5.50
0.033
Iron
10.00
0.34
0
-
4.00
0.11
Zinc
0.40
0.008
2.0
-
0.30
0.006
WATER WATER USAGE PER MONTH (ML)
Date
JAN
FEB MAR APR
MAY JUNE JULY AUG
Town Water
0.7
0.7
0.9
1.1
0.9
4.3
Bore Water
274
253
280
241
246
1294
Mine Water
81
71
76
83
80
391
SEPT OCT
NOV
DEC
TOTAL
300.0
3000
250.0
2500
200.0
2000
150.0
1500
100.0
1000
50.0
0.0
500
0
ANGLESEA ENVIRONMENT REPOR
T MAY 2007
REPORT
grass tree transplant
This year the mine rehabilitation process had a new
twist, with twelve mature Austral Grass trees
(Xanthorrhoea australis) transplanted into the
rehabilitation area.
Whilst not considered politically correct, Grass
trees were once referred to as ‘black boys’. This
reference actually comes from the name ‘balga
grass’ from the Australian Aborigines, which is
their word for black boy. The Aborigines probably
called these plants ‘balga’ because after a wildfire,
the bottom leaves burn away revealing a singed
black trunk with long green reed-like leaves
extending from the top of the trunk giving the
appearance of black figures.
Xanthorrhoea australis is a dominant understorey
plant species within the Anglesea Heath. It forms a
structural layer in an ecosystem that is sparsely
occupied by trees and shrubs and creates
important habitat for small mammals. It is an
essential component to restore in our mine
rehabilitation areas.
Deemed a ‘recalcitrant species’ in our mine
rehabilitation, Grass trees do not emerge on their
own from the topsoil. Several techniques are
utilised to restore this species. Seed is collected
and broadcast directly onto the rehabilitation area
and propagated seedlings are planted. However,
whilst the seed for Xanthorrhoea germinates
reasonably well, all species of Xanthorrhoea are
very slow growing. Growing an average of 1
centimetre per year, to replace the mature 1 metreplus Grass tress would take more than our lifetime
to replace.
This is where the transplantation of established
specimens is unparalleled. Mature grass trees can
be successfully transplanted provided a large root
ball is taken, they are given well drained conditions
and are not allowed to dry out during the reestablishment period.
Whilst the twelve Grass trees translocated this year
represent only a fraction of the hundreds that are
required per hectare, with a lifespan of up to 600
years, it certainly is a worthwhile investment for the
future of the heathland ecosystem.
ANIMALS OF THE ANGLESEA HEATH
SOUTHERN TOADLET (Pseudophryne semimarmorata)
Pseudo
Pseudo...false, phryne
phryne...toad as it is not a true toad
semi
semi...half, marmorata
marmorata...marbled refers to it’s semi-marbled belly
Adult length:
Description:
30mm
dark olive green to chocolate brown on its
back, with dark warts; the belly is marbled
black and white with the undersides of the
legs and throat are orange/red
Distribution:
Victoria, Tasmania and just into SA
Habitat:
this frog lives in sclerophyll forests,
woodlands, heathlands and grasslands. It is
usually found under leaf litter, logs and rocks
in damp areas
Call:
a short, grating ‘ark’ repeated at regular
intervals
Did you know? strictly speaking there are no toads in
Australia. the term toad and toadlet has
arisen due to their superficial similarity to the
warty toads of Europe.
SOUTHERN TOADLET
ANGLESEA ENVIRONMENT REPOR
T MAY 2007
REPORT
LAND
RAINFALL (mm)
Month
JAN
FEB MAR APR
MAY JUNE JULY AUG
SEPT OCT
NOV
DEC
TOTAL
2007 Rainfall
40.0
20.2 25.6
7.3
31.0
37.1
129.4
52.8 17.0
40.8
26.0
32.8
15.8
15.4
29.0
169.6
1968-2006 Average
44.6
43.3 41.5
42.5
53.1
53.5
61.2 60.8
59.3
61.1
67.0
69.3
73.6
54.1
44.2
243.7
130
7 0 0 .0 0
120
6 0 0 .0 0
110
100
5 0 0 .0 0
90
80
4 0 0 .0 0
70
60
3 0 0 .0 0
50
40
2 0 0 .0 0
30
20
1 0 0 .0 0
10
0
0 .0 0
WATER
TOWN WATER USE (ML)
FEB
MAR APR
MAY
JUN
JUL
AUG SEP
OCT
NOV
DEC
Process
23.9
2000 2006 2007 JAN
11.0
3.8
0.6
0.6
0.8
1.0
1.1
0.8
0.9
0.6
0.6
0.7
0.6
1.3
1.5
1.5
Amenity2 . 0
11.6
3.8
0.5
0.1
0.1
0.1
0.2
0.1
0.4
0.1
0.7
0.2
0.4
0.4
0.3
0.3
0.3
0.1
4 0 .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
2000
2006
2007
JA N
F E B
M A R
A P R
M A Y
JUN
JU L
A U G
S E P
O C T
NO 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
1.42
1.23
1.27
1.50
1.45
1.47
1.31
1.49
1.41
1.34
1.24
1.19
1.21
1.21
1.20
1.21
1.20
1.19
2
1600000
1.8
1400000
1.6
1.4
1.2
1200000
1000000
1
800000
0.8
600000
0.6
400000
0.4
200000
0.2
0
0
ANGLESEA ENVIRONMENT REPOR
T MAY 2007
REPORT
environmental improvement
Environmental Management Targets
May
2007 Total
Forecast
2007 Target
Reportable Environmental Incidents
0
0
0
0
Monthly EHS ASAT Audit Completion (%)
100
100
100
90
Air Emission Targets
May
2007 Total
Forecast
2007 Target
Ambient SO2 ( no. readings > 210ppb)
0
0
0
0
Ambient SO2 ( no. readings > 200ppb)
1
1
2
0
Stack SO2 (no. hrs > 100kg/min)
0
0
0
0
SO2 Load Reductions (lost MWh)
1479
3844
9927
N/A
GHG Efficiency (t CO2 e/MWh)
1.19
1.19
1.19
1.20
Opacity (10 min av > 0.25g/m3 normal operation)
0
0
0
0
Water Targets
May
2007 Total
Forecast
2007 Target
Town Water (ML)
0.9
4.3
10.3
14.2
Bore Water (ML)
246
1294
3106
2667
Waste Targets
May
2007 Total
Forecast
2007 Target
Waste to Landfill (t)
0.0
0.0
0.0
9.0
Solid Prescribed Waste to Landfill (t)
0.0
0.0
0.0
0.0
Mine Rehabilitation Targets
2007 Total
2007 Target
2007 Area Cleared (ha)
2.9
3.5
2007 Area Rehabilitated (ha)
5.0
> 3.5
2005 Mine Rehabilitation Species Richness (%)
103
100
OUR ENVIRONMENT AND OUR EMPLOYEES..
Craig, welcome back to Anglesea. A new starter
you have a history with Alcoa and Anglesea?
Yes, this is my second time at Anglesea. I was last here as an
Apprentice Fitter in 1998 (I think) for about six months. After
that I went back to the Point Henry Smelter to finish my
Apprenticeship. I then went on to work in the Carbon Plant,
Light Engineering Workshop and Potrooms while I
completed my degree part time. I have been with Alcoa for
just over twelve and a half years now.
What is your role this time around?
Graduate Mechanical Engineer.
Sounds like you are already involved in a few
environmental projects?
Yes, I have two projects that come under the environmental
umbrella. Installing a system to disperse effluent water from
the septic system that services the Mine buildings and
introducing a system to collect waste oil for it to be recycled,
instead of it being added to the emulsion from the
compressors and burnt in the boiler.
...CRAIG COOK
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