Threshold Planning Quantity

Threshold Planning Quantity in the United States

Threshold Planning Quantity (TPQ) in Environmental Law

The amount of extremely hazardous substances that triggers a reporting requirement under the Emergency Planning and Community Right To Know Act. The TPQ varies from one to ten thousand pounds, depending on the substance.

Companies that have the TPQ of a substance must report to the state emergency response commission and the local emergency planning commission within sixty days of becoming subject to the requirement. They must designate a facility representative and work with the agencies to develop emergency response plans. The main concern of the community is the ability to respond to all possible releases that may threaten the public. Without the information, it cannot plan properly.
Based on “Environment and the Law. A Dictionary”.

Threshold Planning Quantity: Open and Free Legal Research of US Law

Federal Primary Materials

The U.S. federal government system consists of executive, legislative, and judicial branches, each of which creates information that can be the subject of legal research about Threshold Planning Quantity. This part provides references, in relation to Threshold Planning Quantity, to the legislative process, the federal judiciary, and the primary sources of federal law (cases, statutes, and regulations).

Federal primary materials about Threshold Planning Quantity by content types:

Laws and Regulations

US Constitution
Federal Statutory Codes and Legislation

Federal Case Law and Court Materials

U.S. Courts of Appeals
United States courts of appeals, inclouding bankruptcy courts and bankcruptcy appellate panels:

Federal Administrative Materials and Resources

Presidential Materials

Materials that emanate from the President’s lawmaking function include executive orders for officers in departments and agencies and proclamations for announcing ceremonial or commemorative policies. Presidential materials available include:

Executive Materials

Federal Legislative History Materials

Legislative history traces the legislative process of a particular bill (about Threshold Planning Quantity and other subjects) for the main purpose of determining the legislators’ intent behind the enactment of a law to explain or clarify ambiguities in the language or the perceived meaning of that law (about Threshold Planning Quantity or other topics), or locating the current status of a bill and monitoring its progress.

State Administrative Materials and Resources

State regulations are rules and procedures promulgated by state agencies (which may apply to Threshold Planning Quantity and other topics); they are a binding source of law. In addition to promulgating regulations, state administrative boards and agencies often have judicial or quasi-judicial authority and may issue administrative decisions affecting Threshold Planning Quantity. Finding these decisions can be challenging. In many cases, researchers about Threshold Planning Quantity should check state agency web sites for their regulations, decisions, forms, and other information of interest.

State rules and regulations are found in codes of regulations and administrative codes (official compilation of all rules and regulations, organized by subject matter). Search here:

State opinions of the Attorney General (official written advisory opinions on issues of state law related to Threshold Planning Quantity when formerly requested by a designated government officer):

Tools and Forms

Law in Other Regions

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