Sr no Organization Accidents occurred at Key note References
1 USEPA United State 58100 UST leak have been identified [28]
2 United Kingdom Hazardous Installations Directorate 409 dangerous occurrences for 2011/12 [29]
3 Canadian federal contaminated sites inventory Canada 46.6 % of total contamination concerns soil, with 52.1 % of soil contamination due to petroleum [30]
4 England -- 17 % of all serious contamination incidents in 2007 were related to fires, spills and leaks of hydrocarbons [31]
Table 1: A thesis on Bioventing Degradation Rates of Petroleum Hydrocarbons and Determination of Scale-up Factors by Alamgir Akhtar Khan, The University of Guelph.