| Factor |
Desired Conditions |
| Microbial population |
Suitable kinds of organisms that can biodegrade all of the contaminants |
| Oxygen |
Enough to support aerobic biodegradation (about 2% oxygen in the gas phase or 0.4 mg/liter in the soil water) |
| Water |
Soil moisture should be from 50–70% of the water holding capacity of the soil |
| Nutrients |
Nitrogen, phosphorus, sulfur, and other nutrients to support good microbial growth |
| Temperature |
Appropriate temperatures for microbial growth (0–40°C) |
| pH |
Best range is from 6.5 to 7.5 |
