There is a revolving rake to scrape settled grit to a sump for removal. The heavy material settles to the bottom and is then dragged upwards by means of a rake, and then discharged. A rake is a device used in thickeners and settlers to move the settled solids toward the place where they leave the vessel.
The average costs of deep cleaning is between $100-to-$400 per quadrant. This means that if you are getting all four areas scaled and planed, it can cost you as little as $400 or as much as $1,600. About how much you will pay depends on where you live.
Average Costs. As of 2008, a typical oral surgeon's office charged an average of $400 to $500 per tooth for extraction surgery, according to BracesReview.com. This does not include the cost of general anesthesia, which runs from $300 to $500 at a minimum.