Pressure means relative pressure versus atmospheric pressure, unless otherwise stated.
Backpressure means a pressure (caused by a pump, elevated tank or piping, boiler, or other means) on the consumer's side of the service connection that is greater than the pressure provided by the public water system and which may cause backflow.
Reid vapor pressure means the vapor pressure of crude oil or other volatile petroleum products at 100 degrees Fahrenheit as determined by the latest edition of ASTM D6377 (RVPE): Standard Test Method for Determination of Vapor Pressure of Crude Oil.
True vapor pressure means the equilibrium partial pressure exerted by a petroleum liquid as determined in accordance with methods described in American Petroleum Institute (API) Bulletin 2517, Evaporation Loss from External Floating Roof Tanks, 1980. The API procedure may not be applicable to some high viscosity or high pour crudes. Available estimates of true vapor pressure may be used in special cases such as these.
Classification means the identification of a position by reference to a class title and pay range number.
Working pressure means the settled pressure of a compressed gas at a reference temperature of 15 °C in a full pressure receptacle;
Density means the permitted number of dwelling units per
Operating pressure means the pressure at which the parts of an irrigation system are designed by the manufacturer to operate.
Diameter at breast height (dbh) means the diameter of a tree at 4 1/2 feet above the ground measured from the uphill side.
Pressure vessel means a vessel that may be used for containing, storing, distributing, transferring, distilling, processing or otherwise handling any gas, vapour or liquid under pressure greater than the atmospheric pressure and includes any pipeline fitting or other equipment attached thereto or used in connection therewith; and
Design pressure means the maximum pressure that a pressure vessel or plant is designed to withstand safety when operating normally;
Classification Seniority is defined as the length of service in a specific job classification within the bargaining unit, beginning with the date an employee starts to serve a probationary appointment. Classification Seniority shall be interrupted only by separation because of resignation, discharge for just cause, failure to return upon expiration of a leave of absence, failure to respond to a recall from layoff, or retirement.
Vessels shall have the meaning set forth in the recitals.
Attenuation block means a block or stack, having dimensions 20 centimeters by 20 centimeters by 3.8 centimeters, of type 1100 aluminum alloy or other materials having equivalent attenuation.
Grade means the average level of finished ground adjoining a building or structure at all exterior walls;
Process weight means the total weight of all materials introduced into any source operation. Solid fuels charged will be considered as part of the process weight, but liquid and gaseous fuels and combustion air will not.
Tare Weight means the weight of an empty shipping container, excluding all materials used for wrapping, cushioning, banding, waterproofing, packaging, blocking and bracing articles within the exterior container.
Finished water means the water that is introduced into the distribution system of a public water system and is intended for distribution and consumption without further treatment, except as treatment necessary to maintain water quality in the distribution system (e.g., booster disinfection, addition of corrosion control chemicals).
Psig means pounds per square inch gauge.