Glossary H

The Environmental Glossary. Letter H +++ 'Heating Penalty', 'Hand Mating', 'Heat'

A habitat is

A Hazard Index (HI): is the sum of hazard quotients for substances that affect the same target organ or organ system.

A Hazard Ranking System (HRS) is the method EPA uses to assess and score the hazards posed by a site that takes into account the nature and extent of Contamination and the potential for the hazardous substances to migrate from the site through air, soil, surface water, or groundwater; HRS scores are used to determine whether a site should be placed on the National Priorities List (NPL)

- Hazardous Air Pollutant Exposure Model :

The Hazardous Air Pollutant Exposure Model, Version 4 (HAPEM4) is a computer model that has been designed to estimate inhalation exposure for specified population groups and air toxics.

A Hazardous and Solid Waste Amendments (HSWA) is amendments to RCRA,

A Heat Pipe is a device that can quickly transfer heat from one point to another.

The Historical Data are data sets from previous studies, which can range from handwritten field notes to published journal articles.

A Hole is a vacancy in a crystalline structure, which would be filled by an electron if the structure were electrically perfect.

A HOME AND GARDEN USER SECTOR (OR MARKET) involves pesticides applied by homeowners to homes and gardens, including lawns; single and multiple unit housing.

Related Articles

Applied Dose ■■■■■■■■■■
An Applied Dose is In Exposure assessment, the amount of a substance in contact with the primary Absorption . . . Read More
Absorption Barrier ■■■■■■
An Absorption Barrier is any of the exchange sites of the body that permit uptake of various substances . . . Read More
Administered Dose ■■■■■
An Administered Dose is In exposure assessment, the amount of a substance given to a test subject (human . . . Read More
Ambient Measurement ■■■■
An Ambient Measurement is a measurement of the Concentration of a substance or Pollutant within the immediate . . . Read More
Iso 11074 2005 at■■■■
Iso 11074 2005: Title: Soil quality -- Vocabulary; ; ISO 11074:2005 defines terms used in the field of . . . Read More
Biological Magnification ■■■■
A Biological Magnification is Refers to the process whereby certain substances such as pesticides or . . . Read More
Nonimmunologic defenses at■■■
Nonimmunologic defenses: Nonimmunologic defenses are body defenses and barriers which do not rely on . . . Read More
Biological Measurement ■■■
A Biological Measurement is a measurement taken in a biological medium. For exposure assessment, it is . . . Read More
Acute Toxicity ■■■
An Acute Toxicity is the ability of a substance to cause severe biological harm or death soon after a . . . Read More
Background Level ■■■
A Background Level is ; - 1. The Concentration of a substance in an Environmental media (air, water, . . . Read More