Table 1: Physical Parameters of Soil Samples in the Contaminated and Clean Soil Profiles

Annual Mean (%)a
Sample Depth Dry Weight (%) Organic Matter (%) Petroleum Hydrocarbons (mg kgdw-1) O2 CO2 CH4
Contaminated 0.0-0.5 94.6 2.2 500 ndb nd nd
0.5-1.0 96.2 0.5 330 14.6 7.2 0.0
1.0-1.5 93.2 2.5 8160 3.5 13.9 3.4
1.5-2.0 96.8 0.8 5550 nd nd nd
2.0-2.5 95.1 0.9 12590 0.2 17.5 16.2
3.0-3.8 47.6 40.6 44390 nd nd nd
3.8-4.0 92.9 0.3 <50c 0.6 16.0 15.5
4.0-4.5 86.0 0.6 1190 nd nd nd
4.5-5.0 93.0 0.4 6820 0.5 16.0 15.4
5.5-6.0 92.5 0.6 10290 nd nd nd
6.1-7.0 82.7 0.4 140 nd nd nd
Clean 0.0-1.0 95.3 0.7 <50 nd nd nd
1.0-2.0 93.5 0.3 <50 20.7 0.3 0.0
2.0-3.0 92.5 0.3 <50 18.9 2.9 0.0
4.0-5.0 90.8 0.3 <50 18.2 3.3 0.0
5.0-6.0 79.6 0.9 <50 nd nd nd

a Annual mean in gas monitoring wells situated within 5 m distance from the sampling points [16].
b Not determined.
c Below detection limit.

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