1 Introduction.
1.1 This is not an in-depth report on Cinderhill Tar Pit 4 but a record of activities leading up to planting and the first week of maintenance.
1.2 The site of the trial was previously a clay pit excavated to supply clay to a local brickworks and subsequently in the 1970s one of five licensed depositories in close proximity for acidic tars, the residues of an oil recycling and lubricants manufacture based in the local area.
