Control Banding NanoTool Sample Clauses

Control Banding NanoTool. The CB NanoTool7 was developed at the Xxxxxxxx Livermore National Laboratory in the United States by Xxxx et al. (2008) and Xxxx et al. (2009). The tool estimates an emission probability (without considering exposure controls), and a severity (hazard) score and provides advice on what engineering controls to use. It includes nine exposure domains covering handling of liquids, powders and abrasion of solids. Within the CB NanoTool tool the hazard band is determined by the severity score. The severity score is based on a number of factors; surface reactivity, particle shape, particle diameter, solubility, and the carcinogenicity, mutagenicity, dermal toxicity, asthmagenicity of both the NM and the parent material. The exposure (probability) band is based on 5 factors; estimated amount of chemical used in the task, dustiness and moistness, number of employees with similar exposure, frequency of operation and duration of operation. The scores associated with the responses to each question are given in Table 4 7 xxxx://xxx.xxxxxxxxxxxxxx.xxx/Home.html Table 4 CB NanoTool tool exposure scores (Xxxx et al., 2008) Factor Level Score Amount (25% of score) >100 mg 25 11-100 mg 12.5 0-10 mg 6.25 Unknown 18.75 Dustiness (30% of score) High 30 Medium 15 Low 7.5 None 0 Unknown 22.5 Number employees with similar exposure (15% of score) >15 15 1-5 0 Unknown 11.25 Frequency (15% of score) Daily 15 Weekly 10 Monthly 5 <Monthly 0 Unknown 11.25 Duration (15% of score) >4 Hours 15 1-4 Hours 10 30-60 Mins 5 <30 Mins 0 Unknown 11.25 These scores are then added to reach an overall hazard score (sum of all hazard input variables scores) and an overall exposure score (sum of all exposure factors scores). These exposure (probability) and hazard (severity) scores are then combined to obtain the assessed risk level (RL) (Table 5). Table 5 CB NanoTool tool risk levels (Xxxx et al., 2008) Probability Extremely Unlikely (0-25) Less Likely (26-50) Likely (51-75) Probable (76-100) Very High (76-100) XX0 XX0 XX0 XX0 High (51-75) XX0 XX0 XX0 XX0 Medium (26-50) XX0 XX0 XX0 XX0 Very High (76-100) XX0 XX0 XX0 XX0 Severity The CB NanoTool also provides recommendations on the risk management measures (RMMs) that should be employed and/or whether the existing control measures need to be updated. The recommendations are based on the risk level estimated: RL1: General Ventilation RL2: Fume hoods or local exhaust ventilation (LEV) RL3: Containment RL4: Seek specialist advice
Sample 1
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