Code of Maine Rules
06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION
096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL
Chapter 170 - DEGASSING OF PETROLEUM STORAGE TANKS, MARINE VESSELS, AND TRANSPORT VESSELS
Section 096-170-3 - Definitions

A. Affected product. "Affected product" means gasoline, aviation gasoline, ethanol, and crude oil. For the purposes of this Chapter, propane or compressed gases, residual fuel oils, and distillate fuel oils are not considered affected products.

B. Degassing or Degassing event. "Degassing" or "Degassing event" means the process of removing organic vapors from a petroleum storage tank, transport vessel, or marine vessel cargo tank during or in preparation for human entry, cleaning, and/or maintenance activity.

C. Liquid leak. "Liquid leak" means the visible dripping of an affected product.

D. Marine vessel. "Marine vessel" means any watercraft, including oil tankers and barges, used as a means of transportation to carry affected products over water.

E. Marine vessel cargo tank. "Marine vessel cargo tank" means a liquid-tight shell designed to contain the cargo.

F. Petroleum storage facility."Petroleum storage facility" means a storage facility that receives affected products from refineries or other storage locations primarily by pipeline or marine vessel and delivers those products to refineries, other storage facilities, bulk plants, or to commercial or retail accounts by pipeline, marine vessel, or transport vessel. For the purposes of this Chapter, a petroleum storage facility does not include aboveground petroleum storage tanks located at industrial manufacturing or electrical generating facilities.

G. Petroleum storage tank. "Petroleum storage tank" means an aboveground container which is used for the storage of affected products.

H. Transport vessel. "Transport vessel" means any land-based mode of transportation (truck or rail) equipped with a storage tank that is used to transport affected products. Vessels used exclusively for maintenance and spill response are not considered to be transport vessels.

I. Vapor control system. "Vapor control system" means the equipment and systems used to reduce volatile organic compound emissions from a degassing event conducted on petroleum storage tanks, marine vessel cargo tanks, and transport vessels.

J. Vapor leak. "Vapor leak" means a failure of containment that results in the presence of gaseous volatile organic compounds at or above 500 parts per million by volume (ppmv) measured as methane above background on a portable hydrocarbon analyzer, in accordance with 40 C.F.R. Part 60, Appendix A, Method 21 as amended 10/17/2000.

K. Vapor tight condition. "Vapor tight condition" means the condition that exists when the reading on a portable hydrocarbon analyzer is less than 500 parts per million by volume (ppmv), measured as methane above background, in accordance with 40 C.F.R. Part 60, Appendix A, Method 21 as amended 10/17/2000.