Pools of oil, grease and water can be seen in ONGC’s Viraj oil fields in Kadi taluka... Sukhdev Patel, a farmer [said] When people complained, they covered the sludge with sand. “Nothing grows where the oil spills; standing crops die instantly…Leakages are unavoidable as some of the pipelines have been in use for 50 years, said Ram Avatar, executive director of ONGC’s Mehsana assets…Officials said contamination near wells are treated on-site…In the case of farms, the excavated soil is treated off-site...