Ceiling level

The U.S. Occupational Safety and Health Administration (OSHA) has set a ceiling level for iodine of 0.1 ppm in air. The American Conference of Government and Industrial Hygienists (ACGIH) estabUshed 0.1 ppm as the TLV (TWA) for iodine. The maximum allowable concentration in air (MAK value) is also 0.1 ppm (104—106). 

Downward The supply air enters at ceiling level or high wall level and is extracted at low level. A perforated ceiling may be used to provide a piston effect. Good air mixing is achieved if cool air enters at high level at the correct temperature and velocity. 

Automatic sprinkler systems have the great advantage that they are comparatively simple in concept and operate automatically, whether or not there are people present on the premises. Water is supplied from the public mains or tanks and pumps into a network of distribution pipes at ceiling level, which covers the whole premises. Water is discharged through nozzles or heads sited at regular intervals in the pipework, which are normally sealed with a he at-sensitive device. 

Some substances are considered to be so toxic that an averaging method does not apply. For these specially listed substances, the recommended level, denoted by (C) in the booklet, becomes the ceiling level, which is the level that should not be exceeded during any part of the working day. 

CERCLA = Comprehensive Environmental Response, Compensation, and Liability Act CL= Ceiling Level DOT =... 

The 2003 ACGIH threshold limit valuetime-weighted average (TLV-TWA) is 50 ppm (229mg/m ) with a short-term excursion limit (STEL)/ceiling level of 75ppm (344mg/m ) and a notation for skin absorption. 

The amount of aluminium introduced into the framework reached ceiling level with increase of reaction time and partial pressure of aluminium trichloride, and showed a gently-sloping peak at around 940 K reaction temperature. Moreover, they did not correspond to the amount of silicone removed from the silicalite during the reaction [8,11]. From these results, it is suggested that by the atom-planting, aluminium atoms occupy special sites in the zeolite framework, and do not substitute silicon atoms in the framework. 

The method consists of 1) attaching the monitor in the breathing zone for a measured interval of up to eight hours (STEL or ceiling level measurements can be made in fifteen minute intervals), 2) terminating exposure and converting the monitor to an analytical device by interchanging one part,... 

Analgesic efficacy and clinical use Nalbuphine (Errick and Heel, 1983 Schmidt et al., 1985) is a medium potent opioid analgesic used for the treatment of moderate to severe pain and inter-operatively as adjunct to anesthesia. Because of its antagonistic action component, analgesia may be subject to a ceiling level. 

General ventilation General ventilation distributed at ceiling level exhaust... 

The National Institute for Occupational Safety and Health (NIOSH) recommended exposure limit TWA for VM P naphtha is 350mgm TWA for a lOh workday and a ceiling level of 1800mgm (15min sampling period). NIOSH recommends preventing contact with eyes and skin. The immediately dangerous to life or health value is 10 000 ppm. 

XLV-C TLV-C is the ceiling level concentration which must not be exceeded, even instantaneously. In some countries these are known as Maximum Allowable Concentration (MAC). 

Quick response in-rack sprinklers in addition to ESFR or large drop sprinklers at the ceiling level can greatly reduce the total number of sprinklers required to attain control or suppression. In extreme cases, compartmentalization of the racks and in-rack sprinklers for each compartment can stop the spread of fire to adjacent racks or compartments. 

Dose constraints are not legally binding but act as ceiling levels, which should not be exceeded. They are recommendations with the aim of limiting doses to the patient s family, close friends and third persons. The dose constraints can be higher than the pubhc dose Emits for the family and close friends. Children (including unborn children) are regarded as members of the pubhc with an applied dose hmit of 1 mSv. 

TLV = Threshold limit value, ACGIH recommended exposure limit as an 8-hour time-weighted average for a 40-hour workweek (TLV-TWA) C = ceiling level (see p 528). 

Cyanogen Chloride - CCIN, 506-77 nonflammable, inhalant poison eye irritant bp = 13.1 C [55.6"F] er = NA sp g = 1.98 ACGIH ceiling level = 0.3 ppm. Toxic properties similar to hydrogen cyanide heat causes it to decompose and emits highly toxic and corrosive fumes. 

No heat/smoke detectors are present in the monorail storage holes. Both Building 6596 east high bay and Building 6597 high bay have heat/smoke detectors at the ceiling level. ... 

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