Asbestos Air Monitoring Results 100 Trinity Place, Oct-Nov 2001

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personal Workers will be medically qualified to wear respirators and 4. equipment. In addition, workers will be licensed by New York City. protective for asbestos abatement work. standards Personal air monitoring will comply with federal OSHA asbestos 5. n- Workers be ed of the test during this phase of the regarding accesstoemployee exposure results as required by OSHA standards information. spaces posted to prevent entry into the office 6. Asbestos warning signs will be by unauthorized persons. constructed at the a at to the law office and the 7. A double airlock will be pressure using air filtration devices. entire office will be kept under negative protective clothing in the second 8. Workers will remove their outer the contaminated decontamination chamber before exiting and placing will don their protective ` garment in a plastic bag. Conversely, workers the airlocks. :.. '; - r clothing and respirator in the ball before enteringuncontaminated into .tstough and blows filtration device filters the outdoor air the airlocks into the work area.) t/ . RECEIVEO 'c smoke tubes w . usdto ° ; 2001 ' 9. Before beginning the decontamination process, test the airflow into the chambers. the decontamination areas . . 10. Aggressive air monitoring will be done to ensure 70 asbestos and cleaning areas are still below the AHERA criteria of operation.. structures per cubic centimeter of air after the initial phase of inside the containment to Constant daily air monitoring will be performed limits. normal ensure airborne concentrations of asbestos fibers remain within outside contamination 11. The windows will be taped and sealed to prevent any infiltrating into the workspace. The windows will remained taped and sealed until exterior of building is cleaned. micro 12. A representative number of all of the items cleaned will be tested using vacuum samples to verify cleanliness. Random samples will be collected surface rather than collecting a sample from each item. The number of samples should be representative of the number and type of items being cleaned. Any item above the suggested ASTM D5755-95 criteria of 100 structures of asbestos fibers will be cleaned and tested again. The porous materials, which cannot be cleaned, should be discarded as asbestos containing waste.

NYC-WTC 000132535