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Goals
PDS is committed to provide outstanding customer service along with the most competitive rates. PDS complies with all state and government regulations.
Our Goals are:
To provide a reliable, permanent method for isolating liquid waste from the environment.
To maintain high standards and meet all regulatory requirements to ensure safety and protect the environment
To offer our customers an excellent option for economical, safe and responsible disposal of liquid waste.
PDS is committed to provide the best customer service along with the most competitive rates. PDS complies with all state and government regulations.
What is a Disposal Well
Disposal wells are vertical pipelines constructed of steel and concrete which are used to move liquids safely from the surface, through many rock layers, to a disposal formation. Liquid wastes are safely and permanently managed by placing them into naturally salt-water filled rocks.
Class I disposal wells (deep wells) place wastes one quarter to two miles below the earth's surface into natural geologic formations. There are typically thousands of feet of impermeable rock formations that separate the injection zone from potential sources of drinking water.
To construct a Class I disposal well, a hole is drilled through all rocks containing usable water, usually several hundred feet deep. Pipe, called surface casing, is installed and cemented to the surface. Then a smaller hole is drilled to a depth of approximately 1,000 feet. Intermediate casing is then installed in this hole, and again the pipe is cemented to the surface.
A hole is then drilled into the disposal formation. Long string casing is installed and cemented to the surface. The well is opened in the targeted formation to allow for disposal.
To complete the well, tubing is installed on a packer inside the long string casing to create an annulus. This annulus (an open safety space between the two pipes) is filled with pressurized fluid to provide a final layer of protection.
Class I wells provide multiple layers of waste isolation. At the surface, four layers of pipe and three layers of cement provide protection for all usable water. The entire well provides a minimum of two layers of pipe, one layer of cement and a pressurized annulus to isolate the waste. Literally hundreds of rock layers isolate waste placed in the disposal formation from drinking water and the surface environment. After disposal, the waste fluids are mixed with naturally salty formation brines that have been trapped in the subsurface for millions of years.
The US Government has found that, "Class I hazardous wells are safer than virtually all other waste disposal practices".
The U.S. Environmental Protection Agency has determined that underground injection is a viable waste management option. The EPA reports that approximately 20 billion gallons of liquid waste is safely and permanently disposed of each year in the United States using Class I disposal wells.
The EPA provides oversight and closely monitors deep well waste disposal. In some cases, state governments have been delegated primacy for the Underground Injection Control (UIC) program. In others, the federal government directly implements the regulations. In all cases, strict standards are enforced by law to ensure that environmentally protective practices are followed. Geologic and engineering information is carefully evaluated before operation is authorized. The EPA will grant a permit for a Class I well only after a comprehensive agency review of an application that demonstrates the compatibility and security of the wastes in the injection zone. Continuous protection of groundwater is accomplished by requiring yearly testing and limiting waste types, volumes and well pressures. Twenty-four hour monitoring is required to verify safe operation and permit compliance.
A wide variety of industries throughout the United States now depend on Class I disposal wells for the safe disposal of liquid wastes. The technology has been proven through wide use to be one of the most efficient and effective methods for handling large quantities of low concentration liquid waste. Typically, these wastes are large water volume, low concentration waste streams which are comprised of approximately 95% water. Often these liquids have already been recycled or treated and are not usable as a resource since they have little product recovery, economic or energy value.
| Wastes Accepted |
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Industry Waste Accepted, But Not Limited To:
• Acid Waste
• Fertilizer
• Paper
• Pesticide Wastes
• Food
• Textile
• Utilities
• Metal Fabrication & Finishing
• Oil & Gas Production
• Petroleum Refining & Storage
• Pharmaceutical
• Agriculture
• Manufacturing
• Chemicals
• Mining
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The PH of injected waste streams shall be greater than 2.0 and less than 12.5. Except when authorized by the President, the specific gravity of injected fluids shall be greater than 0.9 and less than 1.1 |
Industrial nonhazardous waste authorized to be injected by this permit shall consist solely of the following waste streams:
Nonhazardous Class 1 wastes as defined by 30 TAC Section 335.505 and limited as follows:
• Aqueous solutions containing petroleum hydrocarbons
• Aqueous solutions containing less than 24 percent alcohol, not characterized as spent solvent
• Aqueous solutions with a ph greater than 2 and less than 12.5
• Aqueous solutions that contain contaminants below the regulatory limits set forth in 40 CFR 261.24 Table
• Aqueous solutions that contain halogenated organic compounds in concentrations less than 1,000mg/l
• Pesticide Wastes
• Caustic wastes
• Metallic Wastes
• Cyanide Wastes
• Organic Wastes
• Acid Wastes
• Filter Cake and Filter Wastes |
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