![]() Permissible Exposure Limit: The employer shall assure that no employee is exposed to lead at concentrations greater than 50 ug/cu m of air averaged over an 8-hr period. Lead/|Workers whose clothing may have become contaminated should change into uncontaminated clothing before leaving the work premises. Lead/|Work clothing that becomes wet or significantly contaminated should be removed or replaced. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.|The worker should wash daily at the end of each work shift, and prior to eating, drinking, smoking, etc. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Contaminated clothing (including shoes/socks) should not be taken home at end of shift, but should remain at employee's place of work for cleaning.|SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Quality assurance procedures to confirm the efficacy of the cleaning procedures should be implemented prior to the decontaminated protective clothing being returned for reuse by the workers. SRP: Contaminated protective clothing should be segregated in a manner so that results in no direct personal contact by personnel who handle, dispose of, or clean the clothing. ![]() Not recommendable method: Thermal destruction. Recommendable methods: Recycling, precipitation, solidification, & landfill. It should nevertheless be pointed out in a precautionary sense that lead carbonate is not insoluble. Where lead carbonate occurs in small, distributed amt after use, disposal along with refuse and inert waste will be safe in most cases. ![]() The filtered lead sulfide can then be directed to the recovery plant. Treatment with nitric acid to produce lead nitrate and subsequent precipitation of lead sulfide by introducing hydrogen sulfide into the lead nitrate soln is suitable as a standard method for recovering lead from impure residues and various lead cmpd. Lead/|In view of the economic importance of lead and its latent danger, it is desirable that lead residues be routed to a recovery plant to a great extent. Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number D008, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.
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