Site Cleanup and Remediation Comco Petroleum Management Inc., provides remediation, cleanup and follow-up for sites affected by spills or where a site assessment has uncovered an environmental risk. Comco is fully licensed by the Technical Standard and Safety Authority (T.S.S.A.) and the Ontario Ministry of Petroleum (M.O.E.) to deal with petroleum contamination. For spills that impact soils, the company may choose from a number of remediation methods such as excavation and removal, bio-remediation, and soil vapour extraction. The choice depends on various factors such as soil type, cost, time, time constraints and use of land.