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

NYC 9/11 Public Portal Document wn s r.LinLLVa. .~...... 10/2s/x001: ,15:b4 !AX

personal qualified wear respirators and New York City. 4. Workers will medically . orkers will be licensed by protective equipment for asbestos abatement work. asbestos standards will comply with federal OSHA 5. Personal air monitoring ers will be informed of the test during this plisse standards regarding access to employee exposure obtheme results as required by O informaton. the office spaces be postedto prevent entry into 6. Asbestos warning signs will by unauthorized persons. cted th 7. A double airlock will be co negative Ot au filtration devices. entire office will be kept under protective clothing in the second 8. Workers will remove their outer exiting and placing the contaminated decontamination ti mber before don their protective ge t in a plastic bag. Conversely, workers will the airlocks. (The air entering into clothing and respirator in the ball before blows uncontaminated air through outdoor air and filtration device filters the the airlocks into the work area.) process, smoke tubes will be used to 9. Before beginning the decontamination test the airflow into the chambers. ensure the decontamination areas 10. Aggressive air monitoring will be done to criteria of 70 asbestos and cleaning areas are still below the A1;1ERA phase of operation. structures per cubic centimeter of air after the initial the containment to Constant daily air monitoring will be performed inside within nounal limits. ensure airborne concentrations of asbestos fibers remain outside contamination 11. The windows will be taped and sealed to prevent any remained taped and scaled infiltrating into the workspace. The windows will until exterior of building is cleaned. be tested using micro 12. A representative number of all of the items cleaned will be collected vacuum samples to verify cleanliness. Random samples will surface number of rather than collecting a sample from each item. The samples should be representative of the number and type of items being ASTM D5755-95 criteria of 100 cleaned. Any item above the suggested tested again. The porous structures of asbestos fibers will be cleaned and materials, which cannot be cleaned, should be discarded as asbestos containing waste.

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NYC-WTC 000132522