Shale oil extraction Energy estimates that the "ex-situ" processing would be economic at sustained average world oil prices above $54 per barrel and "in-situ" processing would be economic at prices above $35 per barrel. These estimates assume a return rate of 15%. Royal Dutch Shell announced in 2006 that its Shell ICP technology would realize a profit when crude oil prices are higher than $30 per barrel ($190/m), while some technologies at full-scale production assert profitability at oil prices even lower than $20 per barrel ($130/m). To increase the efficiency of oil shale retorting and by this the viability of the shale oil
Imperial Oil Building before the property was listed for sale found that sand about 40 feet below the eastern part of the parking lot was contaminated with heating oil that had leaked from an underground storage tank. The soil was then excavated and replaced. In preparation for the sale, Imperial Oil told Deer Park United Church next door that they would no longer supply building heat to the church, effective July 2008. This led the dwindling congregation to vacate the church building and share space with a nearby Presbyterian congregation (Calvin Presbyterian Church) which had split off from the original Deer Park congregation