Unless otherwise expressly stated, the following words or phrases shall, for the purpose of this chapter, have the meanings indicated in this article:
The distance in feet from the blast location to the nearest dwelling house, public building, school, church, commercial or institutional building neither owned nor leased by the person conducting the blast.
A chemical compound represented by the formula NH4NO3.
Is the organization, office or individual responsible for approving equipment, an installation or a procedure; Sadsbury Township.
The natural features of the ground such as hills, timber of sufficient density that surrounding exposures cannot be seen when the trees are bare of leaves, or an efficient artificial barricade consisting of an artificial sound or properly revolted wall of earth not less than three feet thick at the top.
The area including the blast site and the immediate adjacent area within the influence of flying rock, missiles, and concussion.
The area which explosive materials are being or have been loaded and which includes all holes loaded or to be loaded for the same blast and for a distance of 50 feet (15.3 m) in all directions.
A person, over 21 years of age, licensed in Pennsylvania, physically and mentally fit, qualified to be in charge, and responsible for the loading and firing of a blast.
A material or mixture intended for blasting and which meets the requirements of the DOT Hazardous Materials Regulations, as set forth in Title 49, Code of Federal Regulations, Part 173.114a.
A person or firm representing the Township or other parties demonstrating established blasting expertise.
A structure used for human occupancy.
A mass of explosive material prepared for use in bulk form without packaging.
Equipment (usually a motor vehicle with or without a mechanical delivery device) that transports explosive materials in bulk form for mixing and/or loading directly into boreholes.
With reference to magazine walls or doors, constructed so as to resist penetration of a bullet of 150-grain M2 ball ammunition having a nominal muzzle velocity of 2,700 fps (824 mps) when fired from a 0.30 caliber rifle from a distance of 100 feet (30.5 m) perpendicular to the wall or door.
Explosive material that can be detonated by 150-grain M2 ball ammunition having a nominal muzzle velocity of 2,700 fps (824 mps) when fired from a 0.30 caliber rifle at a distance of 100 feet (30.5 m), measured perpendicular. The test material is at a temperature of 70° F. to 75° F. (21° C. to 24° C.) and is placed against a 1/2-inch (12.7-mm) steel plate.
Any explosive material that can be detonated by means of a No. 8 blasting cap or its equivalent.
The weight in pounds of an explosive charge.
A mixture consisting of an elastomeric type fuel and an oxidizer. Composite propellants are used in gas generators and rocket motors.
Inert material used to separate explosive charges (decks) in holes which receive blasting agents.
The time interval in milliseconds between successive detonations of the delay devices used.
A flexible cord containing a center core of high explosive used to initiate other explosives.
Any device containing an initiating or primary explosive that is used for initiating detonation. A detonator nay not contain more than 10 g of total explosive material per unit, excluding ignition or delay charges. The term includes, but is not limited to, electric detonators of instantaneous and delay types, detonators for use with safety fuses, detonating cord delay connectors, and nonelectric detonators of instantaneous and delay types which consist of detonating cord, shock tube, or any other replacement for electric leg wires.
An explosive material which consists of a slurry of substantial amounts of ammonium nitrate dissolved in water droplets surrounded by an oil-like material.
Any chemical compound, mixture, or device, the primary or common purpose of which is to function by explosion. The term includes, but is not limited to, dynamite, black powder, pellet powder, initiating explosives, detonators, safety fuses, squibs, detonating cord, igniter cord, and igniters.
Any explosive, blasting agent, emulsion explosive, water gel, or detonator.
Any tool or special mechanized device which is actuated by explosive materials. The term does not include propellant actuated devices (see definition of "propellant actuated device"). Examples of explosive-actuated devices are jet tappers and jet perforators.
A rating set forth in NFPA 10, Standard for Portable Fire Extinguishers. This rating may be identified on an extinguisher by a number (5, 20, 70, etc.) indicating relative effectiveness, followed by a letter (A, B, C, or D) indicating the class of classes of fires for which the extinguisher has been found to be effective.
Construction designed to offer reasonable protection against fire.
The lowest temperature at which vapors from a volatile combustible substance ignite in air when exposed to flame.
Any substance that will react with the oxygen in the air or with the oxygen yielded by an oxidizer to produce combustion.
Any close-grained wood such as oak, maple, ash, hickory, etc., free from loose knots, wind shakes, or similar defects.
Explosive materials which are characterized by a very high rate of reaction, high-pressure development and the presence of a detonation wave.
Any public street, public alley, or public road.
Any licensed professional in the blasting or seismography field who represents one and only one of the following: Sadsbury Township; Chester County; PennDOT; Pennsylvania or any state agency; the U.S. Government or any federal agency; the blaster, blasting company; or any insurer representing the blasting company. This independent expert cannot also evaluate claims or make adjustment settlements for insurance carriers.
A system for initiating detonators in which the energy is transmitted through the system by means of a detonation wave guided within a plastic tube.
A person who is a professional engineer licensed in the Commonwealth of Pennsylvania and employed by the Township with an extensive knowledge and experience of blasting and blasting procedures.
Equipment or materials to which has been attached a label, symbol, or other identifying mark of an organization acceptable to the authority having jurisdiction and concerned with product evaluation that maintains periodic inspection of production of labeled equipment or materials and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner.
Explosive materials which are characterized by deflagration of a low rate of reaction and the development of low pressure.
Any building of structure, other than an explosives manufacturing building, approved for the storage of explosive materials.
Simultaneous detonation or explosion of the total or substantial amount of a quantity of explosive material caused by explosion of a unit or part of the explosive material.
A charge of explosive material that fails to detonate completely after initiation.
Any self-propelled vehicle, truck, tractor, semitrailer, or truck trailer combination used for the transportation of freight over public highways.
A detonator with an integral delay element used in conjunction with and capable of being initiated by a detonating impulse.
Any solid or liquid that readily yields oxygen or other oxidizing gas or that readily reacts to oxidize combustible material.
Any individual, firm, copartnership, corporation, company, association, joint-shock association, and including any trustee, receiver, assignee, or personal representative thereof.
Two or more unmixed, commercially manufactured, prepackaged chemical substances including oxidizers, flammable liquid or solids, or similar substance which are not independently classified as explosives, but which when mixed or combined form a mixture which is classified as an explosive and which is intended for blasting. It may be classified by the Hazardous Materials Regulations of the U.S. Department of Transportation as Class A or Class B, depending on its susceptibility to detonation.
Exterior grade plywood.
This is a survey performed prior to any explosive detonations.
A unit, package, or cartridge of explosive material used to initiate other explosives or blasting agents and which contains 1) a detonator or 2) a detonating cord to which is attached a detonator designed to initiate the cord.
An explosive that normally functions by deflagration and is used for propulsion purposes. It may be classified by the Hazardous Materials Regulations of the U.S. Department of Transportation as Class A or Class B depending on its susceptibility to detonation.
Any tool or special mechanized device or gas generator system which is actuated by a propellant or which releases or directs work through a propellant charge.
Any railroad car, streetcar, ferry, cab, bus, airplane, or other vehicle which carries passengers for hire.
Any steam, electric, diesel electric, or other railroad or railway which carries passengers for hire on the particular line or branch in the vicinity of an explosives storage or manufacturing facility.
The actual distance (D) in feet divided by the square root of the maximum explosive weight (W) in pounds that is detonated per delay period for delay intervals of eight milliseconds or greater, or the total weight of explosive in pounds that is detonated within an interval less than eight milliseconds. This means that (Ds) equals (D) divided by the square root of (W). Thus, scaled distance equals actual distance divided by the square root of charge weight per delay period.
Any hose whose electrical resistance is great enough to limit the flow of stray electric currents to safe levels, yet not so high as to prevent relaxation of static electric charges to ground. Any hose having no more than 2.0 megohms resistance over its entire length and not less than 5,000 ohms resistance per feet (16,393 ohms/m) meets this definition.
A characteristic of an explosive material, classifying its ability to detonate upon receiving an external impulse such as impact shock, flame, or other influence which can cause explosive decomposition.
Small percussion sensitive explosive charges, encased in a cap, used to ignite propellant powder.
Any coarse grained wood such as fir, hemlock, spruce, or pine, free from loose knots, wind shakes, or similar defects.
Shaped materials, sheet forms, and various other extrusions, pellets, and packages of high explosives used for high energy rate forming, expanding, and shaping in metal fabrication and for dismemberment and reduction of scrap metal.
General purpose, hot or cold rolled, low carbon steel, such as ASTM A366 or equivalent.
That top portion of a borehole that contains a tightly tamped backfill or other inert material.
Roads, culverts, bridges, walls, and railroad tracks.