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H. Glossary/Acronyms
Antelope Transmission Project, Segments 2 & 3
H. GLOSSARY/ACRONYMS

Final EIR
H-1
December 2006
H. Glossary/Acronyms
H.1
Glossary of Terms
Alternating current. An electric current that
reverses direction in a circuit at regular
intervals.
Ambient. Surrounding on all sides.
Baseflow. Groundwater seepage into a stream
channel.
Ampere. A unit of electric current in the
meter-kilogram-second system.
Bar. Accumulations of bed material (in a
stream or river) positioned successfully
downstream on the opposite side of the channel.
Baseline. A set of existing conditions against
which change is to be described and measured.
Circuit. An electrical device that provides a
path for electrical current to flow.
Conductor. A substance or medium (wire) that
conducts an electrical charge.
Current. The amount of electric charge
flowing past a specified circuit point per unit
time.
Decibel. A unit used to express relative
difference in power or intensity, usually
between two acoustic or electric signals. The
A-weighted decibel scale (dBA) represents the
relative insensitivity of the human ear to low-
pitched sounds; decibels are logarithmic units
that compare the wide range of sound intensives
to which the human ear is sensitive.
Dielectric. A material such as glass or
porcelain with negligible electrical or thermal
conductivity. A dielectric is an electrical
insulator that is highly resistant to flow of
electrical current.
Direct current. An electrical current flowing in
one direction only.
Ephemeral stream. A stream or reach of a
channel that flows only in direct response to
precipitation in the immediate locality and is at
all times above the saturation zone.
Hertz. A unit of frequency equal to one cycle
per second.
Hoop strength. A physical property that
describes the ability of a tube to withstand
internal pressure, bending forces, and crushing
forces.
Hydrologic cycle. The hydrologic cycle refers
to the continuous exchange of water between
atmosphere, land, surface and subsurface
waters, and organisms.
Insulator. A material such as glass or porcelain
with negligible electrical or thermal
conductivity.
Kilohertz. A unit of alternating current or
electromagnetic wave frequency equal to one
thousand hertz (1,000 Hz).
Kilovolt (kV). A unit of electromotive force
equal to 1,000 volts.
Kilowatt. A unit of power equal to 1,000
watts.
Megawatt (MW). A unit of power equal to one
million watts.
Polyethylene. A lightweight thermoplastic.
Pool. Deep zones (in a stream or river) located
directly opposite from bars.
Remedial Action Scheme (RAS). A protection
system, or plan of action, which automatically
initiates one or more remedial actions to ensure
transmission system reliability. Also called
Special Protection System (SPS).
Riffle. Shallow zones (in a stream or river)
between pools.
Right-of-way (ROW). The strip of land over
which facilities such as power lines are built.
Riparian. Area along the banks of a river or
lake supporting specialized plant and animal
species. Antelope Transmission Project, Segments 2 & 3
H. GLOSSARY/ACRONYMS

December 2006
H-2
Final EIR
Saturation zone. Area of ground with ground
water: the zone below the water table that is
saturated with ground water.
Seismicity. The relative frequency and
distribution of earthquakes.
Special Protection Scheme (SPS). A
protection system, or plan of action, which
automatically initiates one or more remedial
actions to ensure transmission system
reliability. Also called Remedial Action Scheme
(RAS).
Substation. A subsidiary station where
electricity is transformed for distribution by a
low-voltage network.
Substrate. Geologic term describing soil or
geologic layers underlying the ground surface.
Terrestrial. Related to or living on land.
Terrestrial biology deals with upland areas as
opposed to shorelines or coastal habitats.
Tributary. A stream that flows into a larger
stream or other body of water.
Voltage. The rate at which energy is drawn
from a source that produces a flow of electricity
in a circuit, expressed in volts.
Watershed. The area contained within a
drainage divide above a specified point on a
stream.
Williamson Act. Also California Land
Conservation Act of 1965.
H.2 Acronyms
2B
Two-conductor bundled

A
Amperes

AADT
Annual Average Daily Traffic

AAQS
Ambient Air Quality Standards

AC
Alternating Current

ACEC
Area of Critical Environmental Concern

ACI
American Concrete Institute

ACSR
Aluminum Conductor Steel Reinforced

ADT
Average daily traffic/trips

AHM
Acutely Hazardous Material

AISC
American Institute of Steel Construction

AMNH
American Museum of Natural History

ANSI
American National Standards Institute

APA
Administrative Procedures Act

APCD
Air Pollution Control District

APE
Area of potential effect

APEFZ
Alquist-Priolo Earthquake Fault Zone

API
American Petroleum Institute

APM
Applicant-Proposed Measure

AQMD
Air Quality Management District

Antelope Transmission Project, Segments 2 & 3
H. GLOSSARY/ACRONYMS

Final EIR
H-3
December 2006
AQMP
Air Quality Management Plans

AQRV
Air Quality-Related Values

ARB
Air Resources Board

ARP
Accidental Release Plan

ASCE
American Society of Civil Engineers

ASI
Archaeological Sensitivity Index

ASL or asl
Above sea level

ASME
American Society of Mechanical Engineers

ASTM
American Society for Testing Materials

AVAQMD
Antelope Valley Air Quality Management
District

AVUHSD
Antelope Valley Union High School District

AVTA
Antelope Valley Transit Authority

AWG
American Wire Gauge

AWS
American Welding Society

BLM
Bureau of Land Management

BMP
Best Management Practices

BPA
Bonneville Power Administration

CAA
Clean Air Act (Federal)

CAAQS
California Ambient Air Quality Standards

CAISO
California Independent System Operator

CalARP
California Accidental Release Prevention
(Program)

Cal-EPA
California Environmental Protection Agency

CalOSHA
California Occupational Safety and Health
Administration

CAR
Center for Archaeological Research

CARB
California Air Resources Board

CBC
California Building Code

CCAA
California Clean Air Act

CCR
California Code of Regulations

CDE
California Department of Education

CDFG
California Department of Fish and Game

CDMG
California Division of Mines and Geology

CDOC
California Department of Conservation

CDOG
California Division of Oil and Gas
Antelope Transmission Project, Segments 2 & 3
H. GLOSSARY/ACRONYMS

December 2006
H-4
Final EIR
CEC
California Energy Commission

CEQA
California Environmental Quality Act

CERCLA
Comprehensive Environmental Response,
Compensation and Liability Act (Superfund)

CFM
Cubic feet per minute

CFR
Code of Federal Regulations

CFS
Cubic feet per second

CGS
California Geographical Survey

CGTL
Compressed Gas Insulated Transmission Lines

CHP
California Highway Patrol

CHRIS
California Historical Resources Information
System

CHSC
California Health and Safety Code

CLCA
California Land Conservation Act of 1965

CLWA
Castaic Lake Water Agency

CNDDB
California Natural Diversity Data Base

CNEL
Community Noise Equivalent Level

CNPS
California Native Plant Society

CO
Carbon monoxide

CO2
Carbon dioxide

COE
Corps of Engineers, U.S. Army (see also
USACE and USACOE)

CPCN
Certificate of Public Convenience and
Necessity

CPUC
California Public Utilities Commission

CRHR
California Register of Historic Resources

CSUB
California State University, Bakersfield

CSUF
California State University, Fullerton

CWA
Clean Water Act

dB
Decibels

dBA
A-weighted decibel

DC
Direct current

DDE
Dichlorodiphenyldichloroethylene

DDT
Dichlorodiphenyltrichloroethane

DG
Distributed generation

DHS
California Department of Health Services

Antelope Transmission Project, Segments 2 & 3
H. GLOSSARY/ACRONYMS

Final EIR
H-5
December 2006
DOSH
Division of Occupational Safety and Health

DOT
Department of Transportation

DRR
District Rangers Representative

DSM
Demand-side management