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Environmental lab report distribution, May 2002

Machine-extracted title · confidence 90%

EPA staff distributed an environmental laboratory report to federal and city agencies on May 15, 2002.

NYC-WTC_000162222–000162238

Folder label: “E-mails 2002 M. Gilsenan

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NYC 9/11 Public Portal Document

Lead

Tier Action Lead (settled dust) Lead (indoor air) Screening Basis Screening Basis Value Value 1 Aggressive >40 ug/ft2 1) HUD standard >1.5 ug/m3 NAAQS cleaning. If levels for floors (intended to persist, take 2) Residential keep 99.5 % of additional action to Lead Hazard childhood reduce exposure. Standard (TSCA population Section 403) below 30 ug/dl) n Maintain 25 ug/ft2 (or HUD screening 0.1 ug/mS to 0.1 ug/m3 is recommended background) level for floors 1.5 ug/ni3 UBKLead cleaning methods. to 40 ug/ft2 Model default Consider additional value for urban monitoring. background m No further action <25 ug/ft2 (or HUD screening 0.1 ug/m3 (or Detennination background) level or local background) oflocal background background

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NYC-WTC_000162228

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