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GA

Go Ahead.

GAAP

Generally Accepted Accounting Principles.

GAC

Granular Activated Carbon.

GACT

Generally Available Control Technology.

GACT

Granular Activated Carbon Treatment.

galvanic couple

the connection of two dissimilar metals in an electrolyte that results in current flow through the circuit.

game fish

species like trout, salmon, bass, etc. caught for sport. They show more sensitivity to environmental changes than "rough" fish.

gamma ray

the most penetrating waves of radiant nuclear energy. They can be stopped by dense materials like lead.

gamma radiation

gamma rays are true rays of energy in contrast to alpha and beta radiation. The properties are similar to x-rays and other electromagnetic waves. They are the most penetrating waves of radiant nuclear energy but can be blocked by dense materials such as lead.

gang mixer

a multiple unit stirrer.

gangrene

death of tissue leading to its rotting.

gangue

the earthy material remaining from one beneficiation.

GAO

General Accounting Office; assists Congress in carrying out legislative and oversight responsibilities.

garbage

see food waste.

garbage grinding

use of a household disposal to crush food waste and wash it into the sewer system.

gas

a formless fluid that occupies the space of its enclosure.It can settle to the bottom or top of an enclosure when mixed with other materials. It can be changed to its liquid or solid state only by increased pressure and decreased temperature.

gasification

conversion of a solid material, such as coal, into a gas for use as fuel.

gastric lavage

washing out of the stomach using a tube and fluids.Pumping the stomach.

gastroenteritis

inflammation of the stomach and intestines.

gastrointestinal tract

the stomach and intestine as a functional unit. Also GI tract.

gastric lavage

Medical procedure involving irrigation or washing out of the stomach.

gathering lines

means any pipeline, equipment, facility, or building used in the transportation of oil or gas during oil or gas production or gathering operations.

gavage

feeding by means of a stomach tube.

GC

Gas Chromatograph(y).

GC

General Counsel.

GC/CON

Gas Chromatography/Conductivity Detector.

GC/ECD

Gas Chromatography/Electron Capture Detector.

GC/FID

Gas Chromatograph/Flame Ionization Detector.

GC/MS

Gas Chromatograph/Mass Spectrograph.

GC/MS

Gas Chromatography/Mass Spectrometry.

GC/PID

Gas Chromatograph/Photoionization Detector.

GEI

Geographic Enforcement Initative.

Geiger counter

an electrical device that detects the presence of radioactivity.

gelular

a jellylike appearance with no apparent physical pores.

GEMI

Global Environmental Management Initative.

GEMS

Global Environmental Monitoring System.

GEMS

Graphical Exposure Modeling System.

gene

a length of DNA that directs the synthesis of a protein.

gene library

a collection of DNA fragments from cells or organisms. So far, no simple way for sorting the contents of gene libraries has been devised. However, DNA pieces can be moved into bacterial cells where sorting according to gene function becomes feasible.

general permit

a permit applicable to a class or category of dischargers.

general ventilation

also known as dilution ventilation. The removal of contaminated air and its replacement with clean air from the general workplace area as opposed to local ventilation, which is specific air changing in the immediate air of a contamination source. An example of local ventilation is a laboratory fume hood.

generator

a device that converts mechanical energy into electrical energy.

generator

a facility or mobile source that emits pollutants into the air or releases hazardous wastes into water or soil.

generator

a person, group or organization whose activities produce hazardous waste.

generic name

a designation or identification such as code name, code number, trade name, or brand name used to identify a chemical by other than its chemical name.

genetic engineering

a process of inserting new genetic information into existing cells in order to modify any organism for the purpose of changing one of its characteristics.

GEP

Good Engineering Practice.

germicide

any compound that kills disease-carrying microorganisms. These must be registered as pesticides with EPA.

gestation

The development of the fetus in the uterus from conception to birth; pregnancy. EXAMPLE LAY LANGUAGE: Pregnancy.

GFAA

Graphite Furnace Atomic Absorption.

GFD

Geotechnical Field Drilling.

GFF

Glass Fiber Filter.

GI, GIT

see Gastrointestinal Tract.

GIGO

Garbage In - Garbage Out.

gingivitis

inflammation of the gums.

GIS

Geographic Information Systems.

GIS

Global Indexing System.

GLC

Gas Liquid Chromatography.

GMCC

Global Monitoring for Climatic Change.

g/mi

Grams per Mile.

g-mole

Gram-Mole.

GMT

Greenwich Mean Time.

GNP

Gross National Product.

GPAD

Gallons per Acre per Day.

GPG

Grams per Gallon.

GPM

Gallons Per Minute.

GPR

Ground-Penetrating Radar.

GPS

Groundwater Protection Strategy.

grain

a unit of weight equal to 65 milligrams or 2/1,000 of an ounce.

grain loading

the rate at which particles are emitted from a pollution source -- measurement is made by the numbers of grains per cubic foot of gas emitted.

grains per gallon

a unit of concentration 1 gr/gal = 17.1 mg/L.

granular activated carbon treatment

a filtering system often used in small water systems and individual homes to remove organics. GAC can be highly effective in removing elevated levels of radon from water.

GRAS

generally recognized as safe. A phase applied to food additives approved by the FDA.

gravimetric

measurement by weight.

gray water

the term given to domestic wastewater composed of washwater from sinks, kitchen sinks, bathroom sinks and tubs, and laundry tubs.

grease

in wastewater, a group of substances including fats, waxes, free fatty acids, calcium and magnesium soaps, mineral oils, and certain other nonfatty materials. The type of solvent and method used for extraction should be stated for quantification.

green belt

buffer zones created by restricting development from certain land areas.

greenhouse effect

the warming of our atmosphere caused by buildup of carbon dioxide, which allows light from the Sun's rays to heat the Earth but prevents loss of the heat.

green liquor

the liquor resulting from dissolving molten smelt from the kraft recovery furnace in water.

green sand

a natural mineral, primarily composed of complex silicates, which possess ion exchange properties.

GRGL

Groundwater Residue Guidance Level.

grinder pump

a mechanical device which shreds solids and raises the fluid to a higher elevation through pressure sewers.

gross alpha particle activity

total activity due to emission of alpha particles. Used as the screening measurement for radioactivity generally due to naturally-occurring radionuclides.Activity is commonly measured in picocuries.

gross beta particle activity

total activity due to emission of beta particles. Used as the screening measurement for radioactivity from man-made radionuclides since the decay products of fission are beta particles and gamma ray emitters. Activity is commonly measured in picocuries.

ground cover

plants grown to keep soil from eroding.

grounding

a safety practice to conduct any electrical charge to the ground, preventing sparks that could ignite a flammable material. See Bonding.

groundwater

the supply of fresh water found beneath the Earth's surface, usually in aquifers, which is often used for supplying wells and springs. Because groundwater is a major source of drinking water there is growing concern over areas where leaching agricultural or industrial pollutants or substances from leaking underground storage tanks are contaminating groundwater.

groundwater under the direct influence of surface water

means any water beneath the surface of the ground with(1)algae, or large-diameter pathogens such as Giardia lamblia, or(2) significant and relatively rapid shifts in water characteristics such as turbidity, temperature, conductivity, or pH which closely correlate to climatological or surface water conditions. Direct influence must be determined for individual sources in accordance with criteria established by the State.The State determination of direct influence may be based on site- specific measurements of water quality and/or documentation of well construction characteristics and geology with field evaluation.

GS

General Schedule.

GS

Geological Survey.

GSA

General Services Administration.

GVP

Gasoline Vapor Pressure.

GWC

Geotechnical Well Construction.

GWM

Ground-Water Monitoring.

GWPS

Groundwater Protection Standard.

GWPS

Groundwater Protection Strategy.

GWTF

 

 

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