Glossary R

The Environmental Glossary. Letter R +++ 'Range', 'Relative percent difference (RPD)', 'Risk'

A R rating curve is a drawn curve showing the relation between gage height and Discharge of a stream at a given gaging station.

Radon (Rn) is a cancer-causing radioactive gas found in many communities' ground water. Radon is a colorless, odorless, naturally occurring, radioactive, inert, gaseous element formed by radioactive decay of radium (Ra) atoms.

A Random Error is an unplanned deviation of an observed value from the true value that occurs produced by unpredictable and unknown sources of variation, e.g., due to fluctuations in conditions such as temperature, mechanical vibrations, reading error, etc.; also known as experimental error.

A Random Sample is a subsection of a population selected in such a way that each unit of the population has the same chance of being selected.

German: Bereich
A Range is the difference between the maximum and minimum values of a set of values. When the number

A Ranked Set Sampling is a specimen site-selection process wherein expert judgment or an auxiliary measurement method is used, in combination with simple random specimen collection, to determine which locations in the field should be selected.

The Raw Data are all the documentation generated during sampling and analysis which includes, but is not limited to, field notes, hardcopies of electronic data, disks, untabulated sample results, QC sample results, printouts of chromatograms, instrument outputs, and handwritten notes.

A Readiness Review is a systematic, documented assessment of the preparedness for the start-up or continued use of a facility, process, or activity typically conducted prior to initiation of a major phase of work.

A Record is a completed document that provides evidence of an item or process, e.g., photographs, drawings, magnetic tape, and other data recording media.

A Reference Method is a procedure or process which is considered a standardized or commonly accepted and to which another procedure or process is compared.

Related Articles

Acid Deposition ■■■■■■■■■■
An Acid Deposition is a complex chemical and atmospheric phenomenon that occurs when Emissions of sulfur . . . Read More
Criteria air contaminants ■■■■■■■
Criteria air contaminants: Criteria air contaminants (CACs) means Emissions of criteria air contaminants . . . Read More
Alkalinity ■■■■■
An Alkalinity is the capacity of bases to neutralize acids. An example is lime added to lakes to decrease . . . Read More
Chlorides at top500.de■■■■■
Chlorides - Glossary: Chlorides refer to an essential nutrient for plants and animals, including humans, . . . Read More
Greenhouse effect ■■■■■
A greenhouse effect is the process that raises the temperature of air in the lower atmosphere due to . . . Read More
Greenhouse gases at top500.de■■■■■
Greenhouse gases - Glossary: Greenhouse gases are relating to gases such as water vapor, carbon dioxide, . . . Read More
Global warming ■■■■■
The global warming describes the increase in the average temperature of the earth's surface; - - Other . . . Read More
Greenhouse gas ■■■■■
. . . Read More
PH ■■■■■
A pH is a scale that denotes how Acidic or basic a substance is. Pure water has a pH of 7.0 and is neither . . . Read More
Alcohol Dehydrogenase (ADH) at psychology-glossary.com■■■■
Alcohol Dehydrogenase (ADH): Alcohol Dehydrogenase refers to a zinc containing enzyme that breaks down . . . Read More