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Glossary

 in situ
in its original place; unmoved; unexcavated; remaining in the subsurface.
 in-line rotameter
a flow measurement device for liquids and gases that uses a flow tube and specialized float. The float device is supported by the flowing fluid in the clear glass or plastic flow tube. The vertical scaled flow tube is calibrated for the desired flow volumes/time.
 Independent marketer
A petroleum retailer not affiliated with a major brand.
 Independent Refiner
A petroleum refining company that is not a major brand.
 indigenous
living or occurring naturally in a specific area or environment; native.
 infiltration
the downward movement of water through a soil in response to gravity and capillary suction.
 infiltration gallery
an engineered structure that facilitates infiltration of water into the subsurface. Infiltration galleries may consist of one or more horizontal or vertical perforated pipes, a single gravel-filled trench or a network of such trenches, or a combination of these.
 injection well
a well used to inject under pressure a fluid (liquid or gas) into the subsurface.
 inlet well
a well through which a fluid (liquid or gas) is allowed to enter the subsurface under natural pressure.
 inoculate
to implant microorganisms onto or into a culture medium.
 intergranular
between the individual grains in a rock or sediment.
 intrinsic permeability
a measure of the relative ease with which a permeable medium can transmit a fluid (liquid or gas). Intrinsic permeability is a property only of the medium and is independent of the nature of the fluid.
 Islands
pump islands typically have one or two MPD s.
 isotropic
the condition in which hydraulic properties of an aquifer are equal when measured in any direction.
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