Residential sampling protocol, World Trade Center, Oct 2001

NYC 9/11 Public Portal Document

l^c residenti^ piari octTs.wpd ""““PagezOl

------ fe

Follow up Recommendations Based on Sampling Results from ATSDR’s Residential Sampling

Asbestos level (bulk and air) Sequential steps for follow up CommentsNotes: Settled dust 1. Clean-up Clean-up should follow OSHA standards for training and > 1% asbestos w/w (PLM) 2 Resample air and bulk worker protection and any state laws for licensing. 5 3 Evaluate data Consideration should be given to removing hard to clean air 4 Determine next actions based on furnishings, like carpet and upholstery, if sampling data any level follow up recommendations remains elevated after repeated cleaning Settled dust 1. Clean-up Consideration should be given to removing hard to clean >Detection Limit - < 1% 2. Resample air and bulk furnishings, like carpet and upholstery, if sampling data § w/w (PLM) 3. Evaluate data remains elevated after repeated cleaning 4. Determine next actions based on air follow up recommendations > 0.01 f/cc (TEM) Settled dust 1. Evaluate all appropriate data >Detection Limit - < 1 % related to asbestos (air, bulk, Special attention should be paid to hard to clean surfaces. w/w (PLM) personal monitors - PLM. XRD, (e.g., certain fabrics, furniture, carpet, and curtains). PCM, TEM) air 2. Determine appropriate follow up <0.01 r/cc (TEM) based on professional judgement 3. If clean up is recommended,

Settled dust resample and reevaluate results 1. Clean-up Remain advised of outdoor levels. If high levels are frequent j Non-detect (PLM) 2. Resample air retesting may be appropriate. 3. Evaluate air data air 4. Determine follow up actions > 0.01 f/cc (TEM) I Settled dust No further action Non-detect (PLM)

n air <0.01 f/cc (TEM) r LO

n 27 o o I o

NYC-WTC_000178115