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WTC Daily Report Memo, Oct 30, 2001

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Memo summarizing daily activities including a debris site visit request on October 30, 2001.

NYC-WTC_000154496–000154511

Folder label: “DEP OEM Reports to Commissioner

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NYC 9/11 Public Portal Document Fax:2122599815 Oct. 31 2001 10:31 P. 03

» Ionizing Radiation: A survey of the rubble pile was conducted on 10/22-10,-23 to check for latent radiation with particular attention to alpha radiation. Preliminary' results show' no elevated levels. Dioxins: Thd: single'sample taken by OSHa and analyzed by the EPA, representing exposure on the pile, shov/cd elevated levels of dioxins. These levels were substantially higher than background levels but comparable to levels found by the EPA on the nibble pile. The dioxins found here are emitted from the on-going rubble fire. OSHA does not have a worker standard for dioxins. Dioxins are considered collectively as suspect human carcinogens. Some of the individual compounds are considered to be known hum an "carcinogens. OSHA is performing additional sampling and will coordinate with EPA m more fully characterise exposure around die .rubble pile. Polynucleated Aromatic Hydrocarbons: OSHA identified several elevated samples, three of which reached or exceeded OSHA’s PEL of .2mg/M.’' These .samples were taken on the pile. OSHA continues to strongly recommend the use of respiratory protection when working bn the nibble pile.

Pending Analysis: In response to information about exposure to the combustion by-products of Freon 22 used in the air conditioning systems ofWTC towers/O§HA conducted sampling for fluorides as HF, Results are pending.

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NYC-WTC_000154499

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WTC Daily Report Memo, Oct 23, 2001 · Box DEP Box 26

NYC-WTC_000154488

Memo summarizing daily activities including Church Street paving for a memorial service on October 23, 2001.

10 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.964

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Daily activity report detailing updated identification requirements for DEP employees and contractors entering the Red Zone at the World Trade Center site.

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