2009 02 february env report

rehab reno
1970’s rehab brought into the 21st century
alcoa anglesea
2009
environment report
february
ANGLESEA ENVIRONMENT REPORT FEBRUARY 2009
air
Air Monitoring
Stack Monitors
Average
Maximum
Opacity g/m3 10-minute average
0.083
0.204
Stack SO2 kg/min 1-hour average Licence limit 100kg/min
73.75
84.81
SO2 1 hour ppb
Average
Maximum
Community Centre
0
50
Primary School
2
148
Mt Ingoldsby
1
39
Scout Camp
1
40
Camp Wilkin
0
90
Camp Road
1
133
Ambient Monitors
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
Community Centre 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 50 0
Primary School
0
1
0
0
0
0 148 3
0
0
0
0
3
2
0
3
2
5
3
0
0
0
1
0
0
0
83 0
Mt Ingoldsby
0
0
0
1
0
1
22 2
0
1
1
0
2
1
1
2
1
4
2
39 0
1
1
0
0
0
22 0
Scout Camp
1
1
1
1
1
2
5
3
1
1
0
1
4
3
1
3
2
6
4
22 1
1
40 1
1
2
9
Camp Wilkin
0
2
0
0
0
0
6
0
0
0
0
0
3
1
0
3
1
6
2
3
0
0
0
0
0
1
90 0
Camp Road
0
3
0
0
0
0 133 1
0
0
0
0
4
3
0
3
1
4
1
0
0
0
51 0
0
2 121 0
EPA Air Quality Objective
200
Alcoa Local Standard
170
0
ANGLESEA ENVIRONMENT REPORT FEBRUARY 2009
water
Water Storage
Barwon Water storage levels for the Geelong system at 22.1% capacity. Stage 4 restrictions apply with a
Daylight Savings exemption to permit limited residential garden watering.
Water Discharge
ML
February
Total
Ashponds (SP1)
123
262
Mine (SP4)
0
0
Water Monitoring
SP1
SP4
SP3
24/02/2009
Ashpond
Mine
Final
EPA limit
Lab Result
EPA limit
Lab Result
EPA limit
Lab Result
pH
4-10
8.2
3-9
no
5-9
7.4
Susp. Solids
100
<4
100
discharge
30
<4
Colour
50
4
50
at
50
5
Aluminium
10
0.11
10
time
5.5
0.031
Iron
10
0.15
20
of
4.0
0.14
Zinc
0.4
0.009
2.0
sampling
0.30
0.008
WATER WATER USAGE PER MONTH (ML)
Date
JAN
FEB MAR APR
Town Water
2.5
1.0
3.5
Bore Water
288
270
558
Mine Water
46
53
99
MAY JUNE JULY AUG
SEPT OCT
NOV
DEC
TOTAL
ANGLESEA ENVIRONMENT REPORT FEBRUARY 2009
mine rehabilitation
Whilst mine rehabilitation wasn’t on the cards for
2009, a small peninsula of soil remained in the
overburden cut from 2007 that impeded the
revised mine plan for this year.
With 0.245 hectares of topsoil, we were able to
rehabilitate 0.658 hectares of area, neatly bounded
by the drain from the mine wetland dam and the
coal haul road, that fits into this long term plan.
Small peninsula is no understatement. The area
was only 0.245 hectares, smaller than most
backyards! However, as our most precious
resource for mine rehabilitation it was not going to
be wasted.
The formula for this year’s mine rehabilitation was a
variation on the techniques we have employed in
previous years. This area was cleared of it’s
overstorey and the understorey mulched in 2007,
leaving minimal vegetation on the site. Therefore it
was simply a case of soil movement to complete
this year’s rehab. The absence of mulch should
not signifcantly impact upon our rehabilitation
results as previous research has shown that mulch
does not contribute additional species to our
rehabilitation above those that regenerate from the
topsoil. In the space of two weeks, 200mmm of
subsoil was laid down over the existing soil profile
topped with 50mm of topsoil. A few quick laps on
the dozer ripped up the ground nicely for some
broadcast seeding and it was all done.
Fortunately, a large area of old rehabilitation was
cleared in 2008 in early preparation for mine
rehabilitation activities in 2010. This area was
first rehabilitated during the years 1975 - 1985
and does not meet today’s rehabilitation standard.
It will be ‘re-rehabilitated’ in the coming years as
we see the coal haul road filled in and the two sides
of the open cut join into a continuous valley of
rehabilitated heathy woodland.
PLANT OF THE ANGLESEA HEATH
ROSY BAECKEA (Euryomyrtus ramosissima ssp. prostrata)
Size:
Habitat:
Distribution:
Form:
8-20cm H x 0.3-1.5m W
tea tree heath
Victoria, NSW, SA and Tasmania
sparsely-branched spreading perennial
shrub
Foliage:
narrow papery leaves 3-10mm long with
pointed tips
Flowers:
single, pendant small white to pale pink
tea-tree-like flowers to 5mm wide
June to February
Status:
listed as ‘Rare in Victoria’
whilst this species is listed as rare, it is
considered a characteristic species of our
heathy woodland and returns in significant
numbers in our mine rehabilitation
Did you know? until recently, this species was identified as
Baeckea ramosissima ssp. prostrata, as the
common name still suggests.
ROSY BAECKEA
ANGLESEA ENVIRONMENT REPORT FEBRUARY 2009
LAND
RAINFALL (mm)
Month
JAN
FEB MAR APR
2009 Rainfall
5.0
5.8
10.8
1968-2008 Average
43.9
42.5
86.4
MAY JUNE JULY AUG
SEPT OCT
NOV
DEC
TOTAL
WATER
TOWN WATER USE (ML)
2000 2008 2009 JAN
FEB
Process
23.9
15.5
3.3
2.5
0.8
Amenity
11.6
1.5
0.2
0.0
0.2
MAR APR
MAY
JUN
JUL
AUG SEP
OCT
NOV
DEC
AIR
GREENHOUSE GAS (GHG) TOTAL (Mt) & GHG EMISSION EFFICENCY (t/MWh)
GHG Mt
‹ GHG
t/MWh
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
1.23
1.27
1.50
1.45
1.47
1.31
1.49
1.40
1.42
1.43
1.24
1.19
1.21
1.21
1.20
1.21
1.20
1.18
1.20
1.22
ANGLESEA ENVIRONMENT REPORT FEBRUARY 2009
environmental improvement
Environmental Management Targets
February
2009 Total
Forecast
2009 Target
Reportable Environmental Incidents
0
0
0
0
Env Near Miss vs Env Incident Run Rate (ratio)
2
1.3
1.3
2.5
Monthly EHS ASAT Audit Completion (%)
88
83
83
90
Air Emission Targets
February
2009 Total
Forecast
2009 Target
Ambient SO2 (no. readings > 200ppb)
0
1
1
0
Stack SO2 (no. hrs > 100kg/min)
0
0
0
0
SO2 Load Reductions (lost MWh)
435
1902
11416
N/A
GHG Efficiency (t CO2 e/MWh)
1.22
1.22
1.22
1.20
Opacity (10 min av > 0.25g/m normal operation)
0
0
0
0
Water Targets
Febuary
2009 Total
Forecast
2009 Target
Town Water (ML)
1.0
3.5
21
14.1
Bore Water (ML)
270
558
3348
4000
Waste Targets
February
2009 Total
Forecast
2009 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
2009 Total
2009 Target
2009 Area to Clear (ha)
0.245
0.0
2009 Area to Rehabilitate (ha)
0.658
0.0
OUR ENVIRONMENT AND OUR EMPLOYEE
Elise, what’s been happening so far in 2009? I started
this year knowing I had 11 weeks of work before I left on
maternity leave. So it’s been like preparing for my own
personal shutdown making sure projects for the next 12
months are scoped, documented, suppliers informed and all
information up-to-date and accessible for someone else to
run with. Had some impromptu mine rehabilitation thrown in
as well.
When will we see you back at Anglesea? At this stage I
have planned for 12 months maternity leave which will see
me back at Anglesea on March 22, 2010. It seems so far
away but i’m sure the year will go quickly.
Who will be looking after your role while you are on
leave? My role has been split into the two areas of land
management and mine rehabilitation. Lisa Mills will be taking
care of everything land management related for the site
whilst three mine rehabilitation projects will be tackled by our
Alcoa colleagues in Western Australia.
Good luck – we hope it all goes well. Thank you - so do I!
...ELISE JEFFERY
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