OMAN DRILLING AND SOIL TECHNOLOGY COMPANY L.L.C.

Mining

NAICS #21 | The Sector as a Whole

The Mining sector comprises establishments that extract naturally occurring mineral solids, such as coal and ores; liquid minerals, such as crude petroleum; and gases, such as natural gas. The term mining is used in the broad sense to include quarrying, well operations, beneficiating (e.g., crushing, screening, washing, and flotation), and other preparation customarily performed at the mine site, or as a part of mining activity.

The Mining sector distinguishes two basic activities: mine operation and mining support activities. Mine operation includes establishments operating mines, quarries, or oil and gas wells on their own account or for others on a contract or fee basis. Mining support activities include establishments that perform exploration (except geophysical surveying) and/or other mining services on a contract or fee basis (except mine site preparation and construction of oil/gas pipelines).

Establishments in the Mining sector are grouped and classified according to the natural resource mined or to be mined. Industries include establishments that develop the mine site, extract the natural resources, and/or those that beneficiate (i.e., prepare) the mineral mined. Beneficiation is the process whereby the extracted material is reduced to particles that can be separated into mineral and waste, the former suitable for further processing or direct use. The operations that take place in beneficiation are primarily mechanical, such as grinding, washing, magnetic separation, and centrifugal separation. In contrast, manufacturing operations primarily use chemical and electrochemical processes, such as electrolysis and distillation. However, some treatments, such as heat treatments, take place in both the beneficiation and the manufacturing (i.e., smelting/refining) stages. The range of preparation activities varies by mineral and the purity of any given ore deposit. While some minerals, such as petroleum and natural gas, require little or no preparation, others are washed and screened, while yet others, such as gold and silver, can be transformed into bullion before leaving the mine site.

Mining, beneficiating, and manufacturing activities often occur in a single location. Separate receipts will be collected for these activities whenever possible. When receipts cannot be broken out between mining and manufacturing, establishments that mine or quarry nonmetallic minerals, beneficiate the nonmetallic minerals into more finished manufactured products are classified based on the primary activity of the establishment. A mine that manufactures a small amount of finished products will be classified in Sector 21, Mining. An establishment that mines whose primary output is a more finished manufactured product will be classified in Sector 31-33, Manufacturing.

Foundation, Structure, and Building Exterior Contractors

NAICS #2381 | This industry group comprises establishments primarily engaged in the specialty trades needed to complete the basic structure (i.e., foundation, frame, and shell) of buildings. The work performed may include new work, additions, alterations, maintenance, and repairs.

Site Preparation Contractors

NAICS #23891 | This industry comprises establishments primarily engaged in site preparation activities, such as excavating and grading, demolition of buildings and other structures, septic system installation, and house moving. Earth moving and land clearing for all types of sites (e.g., building, nonbuilding, mining) is included in this industry. Establishments primarily engaged in construction equipment rental with operator (except cranes) are also included. Earth retention or underwater trenching--are classified in Industry 237990, Other Heavy and Civil Engineering Construction; Crane rental with operator--are classified in Industry 238990, All Other Specialty Trade Contractors; Overburden removal as an activity prior to mineral removal from quarries or open pit mines--are classified in Sector 21, Mining; Drilling oil and gas field water intake wells--are classified in U.S. Industry 213111, Support Activities for Mining; Dismantling tanks in oil fields--are classified in U.S. Industry 213112, Drilling Oil and Gas Wells; Construction equipment rental without an operator--are classified in U.S. Industry 532412, Construction, Mining, and Forestry Machinery and Equipment Rental and Leasing; Tree and brush trimming for overhead utility lines--are classified in Industry 561730, Landscaping Services; and Nuclear power plant decommissioning and environmental remediation work, such as the removal of underground steel tanks for hazardous materials--are classified in Industry 562910, Remediation Services.

Other Commercial and Industrial Machinery and Equipment Rental and Leasing

NAICS #53249 | This industry comprises establishments primarily engaged in renting or leasing nonconsumer-type machinery and equipment (except heavy construction, transportation, mining, and forestry machinery and equipment without operators; and office machinery and equipment). Establishments in this industry rent or lease products, such as manufacturing equipment; metalworking, telecommunications, motion picture, or theatrical machinery and equipment; institutional (i.e., public building) furniture, such as furniture for schools, theaters, or buildings; or agricultural equipment without operators. Renting or leasing heavy equipment without operators--are classified in Industry 53241, Construction, Transportation, Mining, and Forestry Machinery and Equipment Rental and Leasing; Renting or leasing office machinery and equipment--are classified in Industry 532420, Office Machinery and Equipment Rental and Leasing; Renting or leasing agricultural machinery and equipment with operators--are classified in Subsector 115, Support Activities for Agriculture and Forestry; Renting home furniture or medical equipment for home use--are classified in Industry 53229, Other Consumer Goods Rental; and Leasing nonconsumer machinery and equipment in combination with providing loans to buyers of such equipment--are classified in Sector 52, Finance and Insurance.

Testing Laboratories

NAICS #54138 | This industry comprises establishments primarily engaged in performing physical, chemical, and other analytical testing services, such as acoustics or vibration testing, assaying, biological testing (except medical and veterinary), calibration testing, electrical and electronic testing, geotechnical testing, mechanical testing, nondestructive testing, or thermal testing. The testing may occur in a laboratory or on-site. Laboratory testing for the medical profession--are classified in Industry 62151, Medical and Diagnostic Laboratories; Veterinary testing services--are classified in Industry 541940, Veterinary Services; and Auto emissions testing--are classified in U.S. Industry 811198, All Other Automotive Repair and Maintenance.