Capstone Energy Services

Energy Basics

Terms A-Z


Temporarily storing a shipper's excess gas so that shipper doesn't have to sell it at depressed prices.

Peak Demand

The maximum load during a specified period of time.

Peak Load Plant

A plant used primarily during the peak-load periods.

Peaking Capacity

Total capacity of all generating equipment reserved for operation during hours of peak demand.


All parts of those physical facilities through which gas is moved in transportation, including pipe, valves, and other appurtenances attached to pipe, compressor units, metering stations, regulator stations, delivery stations, holders, and fabricated assemblies.

Pipeline Capacity

The maximum quantity of gas that can be moved through a pipeline system at any given time based on existing service conditions such as available horsepower, pipeline diameter(s), maintenance schedules, regional demand for natural gas, etc.

Pooling Point

A common market point, generally located at the terminus of a pipeline's production area. Under a Pooling Point transportation arrangement, the shipper is responsible for ensuring that the total nominations of gas received at the pooling point are in balance with the amounts received into the main stream. Volumes are then transported downstream under corresponding transportation arrangements. Similar arrangements exist in market areas whereby shippers can create pools of volumes from which to balance deliveries to customers with transportation receipts.

Power Marketers

Business entities engaged in buying, selling, and marketing electricity. Power marketers, as opposed to brokers, take ownership of the electricity that they sell.

Power Pool

An association of two or more interconnected electric systems with an agreement to coordinate operations and plans to improved reliability and efficiency.

Price Ceiling

Statutory maximum lawful prices for various categories of natural gas, including gas destined for both the intrastate and interstate markets.

Processing Plant

A plant in which liquefiable hydrocarbons, such as propane, butane, ethane, or natural gasoline, which are initially components of the gas stream, are extracted or removed.


A legal entity which processes or treats natural gas in a gas plant of any type.


Any party owning, controlling, managing, or leasing any gas well and/or party who produces in any manner natural gas by taking it from the earth or waters.


Pounds per square inch.

Public Utility

A business organization performing a service relating to or affecting all of the people within a specified area, usually under provisions of a franchise, charter or "certificate", and subject to special governmental regulations.

Purchased Gas Adjustment (PGA)

A provision approved by the regulatory agency allowing a company to make filings to change its rates, without the usual suspension period, for the purpose of recovering currently the changes in its cost of purchased gas.

Purchased Power Adjustment

A provision in an electric utility rate schedule for periodic rate adjustments to cover increases or decreases in expected costs for power purchased from an outside generation source.

Energy Facts

Energy Facts

Natural gas can be used as a raw material in a variety of products, including paint, fertilizer, plastics and medicines.

Natural gas produces fewer emissions than other fossil fuels, with less nitrogen, sulfur, carbon and fine particulates.

Texas produces the largest amount of natural gas in the USA.

The biggest consumer of coal in the US is the electric power sector.

There are 17,658 electric utility generators in the USA.

Energy Delivery Chains

Energy Delivery Chains

Find out more about how your energy is produced and delivered to your business.

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Energy & the Environment

Energy & the Environment

How we assist clients in responding to national environmental concerns.

  • Initiate and manage a "Green" energy procurement program
  • Evaluate national legislative and regulatory initiatives
  • Research state and local energy efficiency programs and incentives
  • Track energy use and related emissions estimate