NYCDOH/ATSDR asbestos residential sampling results, Apr 2002

z z o o i 1^ co

■D o c o CT o Action Levels for Respirable Silica o' cn "0 co General Public/Residents o ro ro 9L Action Levels: O o Settled dust (XRD) Steps for follow up Comments/Notes o c and 3 CD respirable silica 3

<4•m (NIOSH 7500) 1. Evaluate data, including trends over time Clean up should follow OSHA standards for training and worker protection and any state laws for licensing 2. Evaluate need to warn sensitive groups (people with breathing problems) Consideration should be given to removing hard to Settled dust clean furnishings, like carpet and upholstery, if > 5% crystalline 3. Evaluate the need to restrict general public sampling data remains elevated after repeated cleaning silica access NIOSH REL occupational standard for 8 hour TWA and 4. Identify source and take action to reduce levels exposure. Should limit exposure of general public to below 6 • g/m^ levels above occupational standards Air > 50 • g/n? 5. Evaluate dust loading and silica content to determine if dust clean up is needed

6. Resample after actions have been taken, or if no action, continue to monitor to confirm elevated levels

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