Boart Longyear diamond drilling firm; Brainard-Kilman, a maker of civil engineering devices, such as well monitoring and test equipment; and ChemGrout a mfg of cement grouting equipment. Longyear acquired Slope Indicator Company, the nation's largest producer of geotechnical instruments, and Northern Air Supply in 1988, followed by the Campbell Pacific Division in 1989 and WTD Environmental Drilling in 1990. Then in 1994, North Star Drilling Company, specializing in sonic drilling was acquired. On January 2, 1995, Boart International and the Longyear Company officially merged into a single company and changed its name to Boart Longyear Limited. At this point the two companies
Waste treatment Waste treatment Waste treatment refers to the activities required to ensure that waste has the least practicable impact on the environment. In many countries various forms of waste treatment are required by law. The treatment of solid wastes is a key component of waste management. Different forms of solid waste treatment are graded in the waste hierarchy. Agricultural wastewater treatment is treatment and disposal of liquid animal waste, pesticide residues etc. from agriculture. Industrial wastewater treatment is the treatment of wet wastes from manufacturing industry and commerce including mining, quarrying and heavy industries Sewage treatment is the treatment and disposal