Specifications Hazardous areas

A motor used in standby operation mode should be equipped with a space heater to keep the motor windings dry. In classified areas these space heaters must meet the surface temperature requirement of the specific hazardous area. 

Wlien a contractor/subcontractor is hired to perform work in a potentially hazardous area on one of your facilities or that of a client, the project manager shall provide the contractor/subcontractor a copy of the contractor site safety rules checklist for completion. The form and any other rules specific to that site must be signed, dated, and returned prior to any work being performed at a particular site. An executed copy will be made a part of the project file. 

Vulnerability analysis identifies areas in tlie community tliat may be affected or exposed, indviduals in tlie community who may be subject to injury or death from certain specific hazardous materials, and what facilities, property, or eiivironment may be susceptible to damage should a hazardous materials release occur. A comprehensive vulnerability analysis provides information on ... 

Type and specifications on fan driver, gear types, pow er voltage, phase, cycles. Motors should at least meet specifications equivalent to totally enclosed, fan cooled, or if in explosive hazardous area, TEFC Class I, Group D (except this not acceptable in hydrogen or acetylene atmosphere). Due to moisture conditions around this equipment, it should be protected against moisture penetration and corrosion. 

Solutions of this nature ignore practical considerations of noise, hazardous areas, etc. unless these are specifically entered as constraints. Furthermore, if the site is geometrically complex, then additional detail will need to be included in the problem formulation. 

Data collected in drift studies may later be interpreted in risk assessments in conjunction with toxicity data for specific sensitive areas. Eor example, a risk assessment for determination of appropriate mitigation (if necessary) may include field study data on exposure risk from drift, along with information on other routes of exposure (e.g., dislodgable residues, runoff, etc.) and toxicity data from laboratory and/or field study models. The results of such an assessment may be used to estimate whether a given exposure represents a hazard to any specific entity or ecosystem. 

For the specific extinction area correlation described in (a) those materials which did not burn completely in the full-scale were specifically excluded [12]. The small scale test always leads to complete consumption of the sample. Therefore, more smoke is being produced in the small scale test than in real fires for those materials usually associated with lower fire hazards. This is exactly the kind of issue that is being remedied by measurements of smoke parameter or smoke factor. 

The overall intent of electrical area classification is to provide for safety of personnel and equipment. This is achieved by the elimination of electrical ignition sources near combustible gases or vapors that could explode or bum. The specific reasons for classifying facilities into electrical hazardous areas typically are ... 

Deluge protection can be applied over the entire hazard area with open sprinkler heads located at various floor levels or fixed water spray systems can be applied specifically on the equipment to be protected. Specific water spray application is preferred because it provides better equipment cooling and reduces the water wasted due to wind and fire draft. 

The occurrence of some materials in the form of a colloidal dispersion can introduce or enhance safety hazards. Considering that the dispersion of a material down to colloidal size results in a high specific surface area, chemical reactivity in this state may differ considerably from that of the identical macroscopic material with less surface area. 

The identification of areas of vulnerability and of specific hazards is of fundamental importance in loss prevention. Once these have identified, the battle is more than half won. 

The installation of generators in hazardous areas is focused on special applications. The specific advantages of pressurization as demonstrated for motors apply in full for generators. Two examples shall be given ... 

Specific hazards in case of fire None are known. Special protective equipment and precaution for fire fighters For fires in enclosed areas, wear self-contained breathing apparatus. Do not inhale combustion gases. 

Waste Audits The company must identify the processes, the products, and the waste streams in which (hazardous) chemicals are used. Mass balances of specific (hazardous) chemicals will help to identify source reduction opportunities. Engineering interns could be very valuable in conducting such audits. An outside person can achieve significant progress in this area as well, due to the fact that he or she may be able to cut through some of the management and personnel barriers of the industry. 

Another potential hazard in using fillers is the possible formation of toxic materials. Twelve samples of siliea fillers were studied with respect to their effect on the formation of N-nitrosamines in rubber compounds. Figures 20.1 and 20.2 provide these data. Filler absorption of NO inereases as the fillerk specific surface area increases. This absorbed NO was found to react with amines in rubber and to produee N-nitrosamines. Greater absorption... 

Oncogenicity (or carcinogenicity) testing is one of the specific testing areas under Subdivision F of the Pesticide Assessment Guidelines Hazard Evaluation for Humans and... 

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