In todays fast-paced digital entertainment world, players are constantly looking for platforms that provide both excitement and reliability. Communities often discuss idn poker as a recognizable keyword when exploring modern card gaming environments. With responsive design and smooth gameplay, these platforms attract a wide audience seeking consistent experiences.
The popularity of different lottery formats continues to grow. In many discussions, toto macau 4d is mentioned when users explore specific result formats. These insights help users discover platforms that provide accurate information. With structured reporting, accessing results has become easier.
|
|
|
Coal-tar Residuals and the Environmental ThreatFormer manufactured gas plants typically operated 24 hours a day, 365 days a year. The solid and liquid residuals generated each day were a profound concern for the management of the works. The gas was only briefly stored, then distributed off the plant site. The residuals also had to be move along or they would constitute a space burden, an obstacle to movement around the gas yard, and the liquids would obstruct operations even more profoundly. Owners, operators and managers of gas works had a variety of available options before them. Some residuals could be utilized or sold as by-products and some residuals patently were valueless wastes. Today we are very much concerned about the gas making residuals that were deemed to be unsalable wastes by the works management. These wastes had particular physical and chemical characteristics that made them just as dangerous at the time of their creation as they are today. The smallest portion of the wastes were leaked and spilled in and around the works; the larger portion of the wastes that are found around the gas works today were subject to informed choices of disposition at the time of their creation, by the owners, managers and operators of each gas works. Nature of Coal-tar Residuals
Former Manufactured Gas Plants (FMGPs) produced toxic floaters, mixers, and sinkers, characterizing the variable density of the dominantly liquid wastes. Among these toxics were aromatic hydrocarbons, including the tar-acid phenols and cresols; the monocyclical aromatic hydrocarbons (MAHs) more commonly known as the BTEX series (benzene, toluene, ethylbenzene and xylene); the duocyclical aromatic hydrocarbons (DAHs) represented mainly by the base-neutral naphthalene; the polycyclical aromatic hydrocarbons (PAHs) represented by the medium and heavy oils (the "tars"), as well as various forms of cyanogens, sulfur, and some heavy metals concentrated from the trace metals of the coal and some of the enrichment oils. Most coal-tar wastes are chemically labeled as "non-aqueous" because they do not have the high degree of solubility in water that has traditionally concerned chemists, who are not notably concerned about groundwater pollution. Taken from the standpoint of environmental protection, many of the wastes lie in the ppm range of solubility in water and, hence are chemicals of concern (COC) from the environmental standpoint. Industrial chemical production, worldwide, was based on coal-tar as a source, from about 1854 (with Perkin's discovery of coal-tar dyestuffs) to the demise of coal as a routine domestic and industrial energy source, in the face of local municipal smoke and smog control ordinances (beginning in 1950s) and air pollution restrictions (1970 Federal Air Pollution Control Act). Certainly there are other factors, such as the rise of natural gas pipelines after the 1928 discovery of high-grade pipeline welding, the rise of petroleum refining as a source of road tar (after about 1940), and the general demise of our domestic steel industry (post-1965).
Why coal-tar sites may go undetected until site explorationGeologists, geological, geotechnical, engineer and land survey crews are often in the key position to detect the presence of coal-tar residuals. The current standard of practice is that sufficient literature and records search work should be performed to detect the presence and layout of gas works over their operating lives.
Generic FMGP WastesGas works wastes had to be managed literally on the day of their creation, burned as fuel, stored, recycled (as with some box wastes), treated (such as distilling for tar-oil fractions, ammonia or sulfur), dumped, transported and dumped, or discharged to the ground. Gas works management had to make a choice of waste management fate, as required by their circumstances, and the choice literally due on the day the wastes were created. Here follows a selection of actual gas works solid wastes typical of what will predictably be found at the dump or dumps of each former manufactured gas plant.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
