Assessments - 3, GPA: 3 ( )

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See Chapter 6. Saturation Level or Time – There is a limit to the amount of chemical that can be adsorbed by activated carbon, or neutralized by chemically-treated carbon. Once the capacity of the carbon is reached, it is considered to be saturated and will adsorb (or neutralize) no further material; the outlet concentration of the chemical will equal the inlet concentration from that point until the filter is replaced. (Note that the capacity of activated carbon is not a constant, but varies with the inlet concentration). Labconco Technical specialists can determine with the computerized carbon- modeling program the estimated time saturation for a particular chemical. When using a HEPA filter alone in all filtered enclosures or in combination with an Odor Control carbon filter, the speed control will need to be increased to allow for HEPA filter loading. Measure filtered enclosure face velocity with an anemometer. IDLH (Immediately Dangerous to Life and Health). An atmosphere that poses an immediate hazard to life or produces 39 Chapter 5: Using Your Filtered Enclosure and Appropriate Application immediate irreversible health effects. IDLH concentrations should not be approached in the enclosure. Appropriate Chemicals for OdorControl Carbon Filters Below is a general set of rules to determine appropriateness of chemical usage. ! Selected organic chemicals considered to be occupational carcinogens by NIOSH can be used in the filtered enclosure with carbon filters under rigid restrictions. See separate discussion on carcinogens for special instructions. Organics must have time weighted exposure limits (TWA) of 1 PPM or greater. Chemicals must have a detectable odor at concentrations below the TWA for the chemical. Chemicals must be designated by NIOSH guidelines as acceptable for use with chemical cartridge-type respirators (the exception is formaldehyde and ammonia/amines, which used impregnated carbon). Chemicals not listed by NIOSH in the Pocket Guide must be approved by Labconco Product Specialist (or Engineering). Inlet concentration must never exceed the IDLH (Immediately Dangerous to Life and Health) concentrations. Chemicals having a recommendation by NIOSH of at least “Escape GMFOV” (Gas Mask Full-Face Respirator). When evaporating a mixture of chemicals, the chemical having the lowest TWA will be used to determine if the mixture meets the guidelines. Call a Labconco Product Specialist at 1-800-821-5525 for assistance in chemical appropriateness. Hazardous Misapplications forOdor Control Carbon Filters with Volatile Chemicals There is one scenario where the accessory carbon filter misapplication would be a part of a hazardous condition. If the Chapter 5: Using Your Filtered Enclosure and Appropriate Application user continues to operate the enclosure with any of the following conditions present a potentially hazardous condition will exist: 1. The inlet concentration of vapors...

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