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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 we 4 “” NYC-WTC net 31 2001 10:38 P10 Uc t Si 2004 IL ~ reak vi ee Rec = Fivers per Cubic Centimeter TWA = Time Weighted Average PEAK « Highost Level Seon During Tost PEL = Pertnissible Exposure Lamit PESH = NYS Public Employee Safety sed Health Bureau ppm = parts per million STEL = Short Term Exposure Limit agi. ; ug — lligroms pox cable moter ND = pot detected NA =not Applicable % = Pexcent <, = Legs Then <a ~ Leas Than or Equal To a = Metale scen ako inchided; Aluminum, Chromium, Mangerese, Molybdemim, Strontium, ant = Nickel. Analytical Method for total dust is based on NIOSH 0600 Anatytical Method for silica is based on OSHA 133142 and NIOSH 7406 Analytical Method for metals is based on OSHA ID 125G 1 = Sample resuk based on analytical method NIOSH 7400. This method villizes Phase Contrast Microscopy (PCM) which cows ALL FIBERS longer than 5 microns in Jength and have a Jongth to withth ratio equal to of gicater than 3:1. 7 = Sample result based on analytical method MIOSH 7402. This method wiliizes Toxnsmission Electron Microscopy (TEM) to identify and quantify asbestos fibers prevent. 5 = The Catling Limh for carbon sovoxide is to be oveasmred over a 5 msinite sample. “== Results may include salable non-wulfwic acid sulfur compounds 1s 000154506

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NYC-WTC_000154506Source: NYC Law Department, mirrored locally

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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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NYC-WTC_000154424 · Box DEP Box 26

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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