The Vedanta Group, which was issued a show-cause notice for allegedly flouting environment laws, will appear before the Union Ministry of Environment and Forest (MoEF) on Thursday.
"We have been asked to appear before MoEF for our reply to the notice," Vice-president A K Samal told reporters here after meeting Orissa Chief Secretary B K Patnaik.
The company's proposed mining project at Niyamgiri hills was rejected by the ministry last month, after the Saxena Committee accused Vedanta of violating the environment protection law and the Forest Conservation Act.
Vedanta was issued a show-cause notice by the ministry for the company to respond to the questions raised by the Committee. The company has also been accused of procuring bauxite from 'illegal' mines in Jharkhand.
Claiming the company had done nothign wrong and was implementing the mining project in accordance with the Supreme Court direction, Samal said "things will be clear at the September 30 hearing.
"We are hopeful the MoEF will realise we have done nothing wrong in our proposed mining project, as well as the refinery project at Lanjigarh," he said.
"This apart, we have urged the state government to respond to the MoEF's queries on Vedanta's proposed Rs 15,000-crore university project at Puri," Samal said.
Work on the Anil Agarwal Foundation's world-class university project was stopped after the ministry raised questions on alleged violation of the coastal regulation zone Act.