Emergency pond

An emergency pond is needed in cold areas to avoid freezing the pipeline after a shutdown. Sometimes a special valve chamber is installed with a valve on a tee branch. This valve automatically opens on power failure to divert slurry to the emergency pond. 

An emergency pond needs its own pumping system. It can consist of a vertical slurry pump floating on a pontoon or barge (Figure 12-8). The sump pump feeds a booster pump that redirects the slurry back to the pipeline pump box or back to the thickeners. 

Submersible pumps (Figure 12-9) with augers are also used for emergency ponds near thickeners, particularly with concentrate pipelines. Special water sparges are installed... 

It is also recommended to install emergency ponds near booster pump stations. These should be connected to the booster station by a drainpipe. A pontoon on the pond with a cantilever pump (Figure 12-8) is recommended to pump back the spill to the booster station pump box. 

Access and service roads are an important cost to factor into the budget. It is of utmost importance to be able to reach each pump station, valve chamber, choke station, and emergency pond and to be able to drive around a tailings dam. In large mines, these access roads are sometimes 20 m (60 ft) wide in order to accommodate heavy machinery. 

In the afternoon or early evening before the beavers emerge from their lodge, build a scent mound from mud, scooped up from the pond, just as the beavers do. Use a little garden trowel, or in a pinch, a plastic tub. Wear rubber or plastic gloves to avoid contamination with human scent. About 1 1 of mud suffices. Place the scent sample on top of the scent mound. If you use commercial, dried, and ground beaver castoreum, sprinkle a teaspoon full over the mud. For dissolved scent samples, place a large cork or bottle cap on scent mound. 

Accordingly, one should assume that the crucial emergent process (i.e., biopoiesis) rather took place in surrounding waters enriched with mineral salts, possibly acidic solutions, e.g. mineral springs degrading nearby carbonates or ponds slowly drying out, than in the open ocean. The geochemical plausibility and implications will be discussed next. 

Olson KR, Benowitz NL, Woo OF, Pond SM. Theophylline overdose acute single ingestion versus chronic repeated overmedication. Am J Emerg Med 1985 3(5) 386-94. 

Bleachex manufactures a variety of products using concentrated acids and bases. Plant officials noticed a large quantity of liquid, which was believed to be either sodium hydroxide or hydrochloric acid solution, flowing through the loading bay doors. An Emergency Toxic Spill Response Team attempted to determine the source and identity of the unknown liquid. A series of explosions and the presence of chlorine gas forced the team to abandon its efforts. The unknown liquid continues to flow into the nearly full containment ponds. 

During the same period, another view of nature began to emerge as well - the natural world valued for its inherent beauty, as a place for solace and regeneration of the human spirit. Henry Thoreau had articulated this perspective when he lived in the woods near Walden Pond, 1845-47. John Muir, who founded the Sierra Club in 1892, became a leading... 

Photochemical reductions and oxidations in aquatic environments provide sinks or sources for halocarbons. Such photoreactions are an important process in the dissipation of low-volatility halocarbons, such as halogenated agrochemicals, in aquatic environments (reference 9 contains lead references). For example, field studies of Crossland and Wolff (10) demonstrated the rapid dissipation of pentachlorophenol residues by its photoreaction in English ponds. Evidence emerged that volatile halocarbons such as 1,1,1-trichloroethane (methylchloroform) may have significant sinks in the aquatic environment... 

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