Hazards heights

Sufficient distance should be provided from the outer nozzles to keep spray from being carried over the sides of the basin. If it is not possible to provide 7.6 to 10.7 m (25 to 35 ft) of space, the pond should be enclosed with a louver fence, equal in hei t to the maximum height of the spray, to minimize drift loss. Also, during cold-weather periods, fogging can occur from the spray pond, so that consideration should be given to possible hazards to roadways or buildings in the immediate vicinity. 

A truck carr) ing two tanks containing a very unstable and hazardous gas is involved in an accident that results in tlie consecutive explosion of the tanks -one innncdiately, the second approximately a minute later. The total mass of tlie emission resulting from the explosion of each tank is 30,000 g. The wind velocity is 1 m/s from the north, and tlie effective height of emission is 30 meters at the time of tlie accident. Calculate the concentration of tliis gas at 500 meters south but 100 meters east from the site 10 minutes after tlie explosion of tlie first tank. Assume tliat stability category D applies. 

The required relief area. A], for a volume V] = 1 cu m obtained from the nomograms. The same reduced explosion pressure, P,.ed, and same static activation pressure, Psiau of the relief device are the same for both volumes Vi and V2, and therefore constant. WTien the mechanical strength of the vessel, is changed, the maximum volume and height will change with the hazard class, St-1, St-2, or St-3. 

Owners/operators of facilities that burn small quantities of hazardous waste with a heating value of 5000 Btu/lb are also exempt from Part 266, Subpart H.5 They must, however, comply with the quantity restrictions based on stack height and the surrounding terrain. Also, the hazardous waste firing rate may not exceed 1% of the total fuel requirements. These units are prohibited from burning any waste that contains or is derived from dioxin-bearing wastes. Small quantity burners are required... 

A storage tank contains water contaminated with a small quantity of a soluble hazardous waste material. The tank is 3 m in diameter and 6 m high. At the current time the liquid height is within 1 m of the top of the tank. 

As identified by Brett Rappaport, these weed laws include federal, state, county, and local statutes or ordinances that place limits on what sort of vegetation can be grown on private land within its jurisdiction, and at what height. Most commonly, these laws represent some extension of municipal health codes, which are targeted at the features of yards that might help harbor pests such as rats or mosquitoes or that might present a potential fire hazard. ... 

Protection of facilities that are exposed to a fire hazard from an outdoor storage area is preferably achieved passively by adequate separation distance to the potentially exposed facilities. When the quantity of stored material is large, it should be separated into smaller groups or piles with adequate aisle space maintained to prevent uncontrolled fire spread within the defined storage area. An often used spacing guide for stacked or piled materials is aisle width should equal stack height. 

This Is a common hazard in the handling of expls. In this test, a. torpedo weighing 0.5 to 5kg, slides down an inclined plane at an angle 70 or 80° to strike the expl resting on an anvil. The head of the torpedo and the material of the anvil can be varied, as well as the height of fall. Some results of tests are shown intTable 6.1 on p 76... 

Metal Emission Limits. Limits for metals, both carcinogenic and noncarcinogenic, are based on an adjusted stack height. Failure to meet these limits requires risk assessments using site specific factors and modeling to establish limits for each metal. The assessments are based on the probability of developing adverse health effects or cancer, based on an inhalation exposure pathway to maximum exposed individuals located near the incinerator (see Hazard ANALYSIS AND RISKASSESSL nt). 

One would think that a woman with such a history and reputation would be fearless. But apparently, this is not the case. Amie tells us that she has always been afraid of heights, and had chosen rock climbing to face her fears. The hazard of the sport is apparent. After all, a long fall can kill. But in a twist to Amies story, it turns out that she was only three feet off the ground and attached by a rope to a skilled partner who loved her. Therefore, the probability of a negative consequence was extremely low. It is clear then that our own sense of risk can frighten us even if the activity is not likely to cause harm. 

Store hazardous chemicals below shoulder height of the shortest person working in the lab. 

Maintenance must sometimes be performed at elevated heights, within confined spaces, and in situations with challenging ergonomic conditions. Opening equipment that has not been properly prepared may have potential to release chemicals or electrical or mechanical energy. Hazards that exist in other parts of the process could be transported to areas where maintenance is underway, if the systems have not been suitably isolated or fully cleared of residual chemicals. 

Surges represent a serious hazard for the low coasts of the Kerch Strait. For example, during the hurricane of 28-29 October 1969, a surge wave fully flooded a coastal band a few kilometers wide. The surge height exceeded 3 m. The flood was accompanied by the destruction of near-shore constructions and communications and human losses. 

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