Environmental Site Assessment of contaminated soil

1. National University of
Malaysia
The Environmental Site Assessment of Oil
Contaminated Site in Gong
Badak, Terengganu, Malaysia
Wan Zuhairi W.Y.1*, Abdul Rahim S.1, Ahmad Nazri Saidin2, Shahril Mod
Husin2 & Mohd Noh Ahmad2
1Geology Programme,
Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600
Bangi, Selangor, Malaysia
2TNB Research Sdn. Bhd. (TNBR) No 1, Lorong Air Hitam, Kawasan Institusi Penyelidikan 43000
Kajang, Selangor, Malaysia
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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2. Introduction
National University of
Malaysia
• New Guidelines in Malaysia
• Published June 2009
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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3. Site Assessment and Management
Process
National University of
Malaysia
Tier 1
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June 1, 2013, Seoul National
University, Seoul, Korea
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4. National University of
Malaysia
Study Area
110 m
113 m
116 m
12,760 m2
108 m
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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5. Study Area
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12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
National University of
Malaysia
5

6. Conceptual Site Model
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
National University of
Malaysia
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7. Site Investigation
Soil drilling
23-May-13
National University of
Malaysia
Monitoring well
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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8. Sampling locations
National University of
Malaysia
• Groundwater
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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9. Sampling locations
National University of
Malaysia
• Surface soil, subsurface soil, surface water and air
sample.
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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10. Result 1
National University of
Malaysia
• Surface soil
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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11. Result 2
National University of
Malaysia
• Groundwater & Surface water
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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12. Result 3
National University of
Malaysia
• Subsurface soil
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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13. Result 4
National University of
Malaysia
• Air samples
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
13

14. Risk Assessment
National University of
Malaysia
• Source – Pathways - Receptors
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
14

15. Risk Assessment
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
National University of
Malaysia
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16. Conclusions
1.
2.
3.
4.
23-May-13
National University of
Malaysia
Two types of chemical of concerns (COCs) ; Naphthalene
and Total Petroleum Hydrocarbon (TPH).
The source of contaminant is within the concrete rim No
1 and 2.
Most of the environmental media are not impacted by
these COCs from the source zone except slightly higher
concentrations of Naphthalene and TPH in air samples.
Tier 1 risk assessment has been performed using SSLs as
guidance and indicated that there is no risk except in air
media for naphthalene and in the surface soil inside two
concrete rims of No 1 and 2.
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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17. Recommendations
1.
Contaminant source control. A contaminated soil in
concrete rims no 1 and 2 must be covered and protected
from contact with water and wind.
2.
Clean up the contaminated soil using soil washing
technique using water jet spray with biodegradable
surfactant or detergent.
3.
National University of
Malaysia
Cover the site with a layer of silt/clay and grow small
plants and grass to prevent infiltration of water and
contact with air after the completion of soil remediation.
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
17

18. National University of
Malaysia
Thank you for your
kind attention
Acknowledgement:
• Universiti Kebangsaan Malaysia & TNB Research Sdn. Bhd
• Research Grant STGL-011-2012
23-May-13
12th Global Joint Seminar on Geo-Environmental Engineering :: May 31-June
1, 2013, Seoul National University, Seoul, Korea
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