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(a) Parts of vapor or gas per million parts of contaminated air by volume at 25 °C and 760 torr. (b) Milligrams of substance per cubic meter of air. When entry is in this column only, the value is exact; when listed with a ppm entry, it is approximate. (c) The CAS number is for information only. Enforcement is based on the substance name.
(e) Other cassettes, such as the Bell-mouth, may be used within the limits of their validation. 5.1.2. Gel bands for sealing cassettes. 5.1.3. Sampling pump. Each pump must be a battery operated, self-contained unit small enough to be placed on the monitored employee and not interfere with the work being performed.
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(a) Parts of vapor or gas per million parts of contaminated air by volume at 25 °C and 760 torr. (b) Milligrams of substance per cubic meter of air. When entry is in this column only, the value is exact; when listed with a ppm entry, it is approximate. (c) The CAS number is for information only. Enforcement is based on the substance name.
(e) Other cassettes, such as the Bell-mouth, may be used within the limits of their validation. 5.1.2. Gel bands for sealing cassettes. 5.1.3. Sampling pump. Each pump must be a battery operated, self-contained unit small enough to be placed on the monitored employee and not interfere with the work being performed.
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Apr. 25, 2018 Title 40 Protection of Environment Parts 136 to 149 Revised as of July 1, 2018 Containing a codification of documents of general applicability and future effect As of July 1, 2018. Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register
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5.2 Organic-free reagent water - Water in which an interferant is not observed at the method detection limit for the compounds of interest. 5.3 Formalin - Solution of formaldehyde (CH20) in organic-free reagent water, nominally 37.6 percent (w/w). Exact concentration will be determined for …
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Muffle furnace. Procedure: Take 2 g of sample in a clean, dry silica crucible and place in a muffle furnace at 600°C for 6 hours. Cool and add 2 drops of concentrated nitric acid. Again put the sample in muffle furnace and heat till white ash is produced. Cool the crucble in the desicator and take the weight. Calculation: Weight of the ...
1. Tertiary butyl alcohol (T.B.A.) 50% aqueous for 1-2 hours. 2. 70% Aqueous T.B.A. 2 hours to several days.: 3. 85% aqueous T.B.A. for 1-2 hours. 34 SECTION ONE aqueous T.B.A. for 1-3 hours. Pure T.B.A. for 3 changes of 4 hours in each. Equal parts of Uquid paraffin and T.B.A. for 1-2 hours. 95% 4. 5. 6. Infihrate in paraffin wax. 7. CAJEPUT ...
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