The order the City kept.

NYC-WTC_000140640

Notice instructing staff to preserve original World Trade Center documents as potential evidence in future legal actions against the City.

NYC-WTC_000140641

Agenda for a meeting discussing status of activities, public requests, and development of sampling and cleaning plans for WTC debris.

NYC-WTC_000140642

Introduction to a cross-agency group tasked with identifying contaminants of concern and establishing health-based screening levels for the indoor environment.

NYC-WTC_000140643

Documentation describing the methodology for identifying contaminants of concern using historical data and qualitative toxicity screens.

NYC-WTC_000140644

Summary of contaminants removed from the review list due to being non-detectable or found only in trace amounts, including all VOCs.

NYC-WTC_000140645

Documentation establishing Tier I, II, and III action levels for lead and other contaminants based on EPA and HUD guidance.

NYC-WTC_000140646

Table defining action thresholds for lead in settled dust, ranging from aggressive cleaning to no further action based on concentration.

NYC-WTC_000140647

Table defining action thresholds for lead in indoor air using NAAQS and background values to determine required cleaning measures.

NYC-WTC_000140648

Table establishing risk-based screening levels for polycyclic aromatic hydrocarbons in settled dust with corresponding remediation actions.

NYC-WTC_000140649

Documentation defining action thresholds for PAHs in indoor air based on residential risk assessments and background concentrations.

NYC-WTC_000140650

Table outlining risk-based screening levels for dioxins in settled dust with specific cleaning requirements for exceeding thresholds.

NYC-WTC_000140651

Documentation setting dioxin action levels for indoor air and providing initial guidance on asbestos fiber concentration risk estimates.

NYC-WTC_000140652

Guidance document defining actions for elevated asbestos fiber levels in air and settled dust based on NYC background concentrations.

NYC-WTC_000140653

List of unresolved technical issues including methodology resolution, background characterization, and building material fingerprinting efforts.

NYC-WTC_000140654

EPA notification of WTC indoor air task force meeting scheduled for April 8, 2002 at 290 Broadway.

NYC-WTC_000140655 – NYC-WTC_000140656

Notes from working group meeting regarding WTC cleanup coordination and request for agency roundtable.

NYC-WTC_000140657 – NYC-WTC_000140658

EPA notification of WTC indoor air task force meeting scheduled for April 8, 2002 at 290 Broadway.

NYC-WTC_000140659

Notes from working group meeting regarding WTC cleanup coordination and request for agency roundtable.

NYC-WTC_000140660

Document containing contact information and reference to indoor air working group meeting notes from March 18, 2002.

NYC-WTC_000140661

Document containing contact information and a filename reference for the March 18, 2002 working group meeting notes.

NYC-WTC_000140662

EPA memo to interagency partners coordinating WTC environmental response activities.

NYC-WTC_000140663

EPA memo to NYC and state agencies coordinating WTC environmental cleanup response.

NYC-WTC_000140672

Meeting agenda for April 18, 2002 covering minutes, chemical sampling, and HVAC recommendations.

NYC-WTC_000140673 – NYC-WTC_000140674

Attendance list for the April 25, 2002 EPA indoor air working group meeting at 290 Broadway.

NYC-WTC_000140675

Meeting agenda for April 28, 2002 covering study issues, FEMA submissions, and chemicals of concern.

NYC-WTC_000140676

Meeting agenda for March 4, 2002 covering FEMA scopes and preparation for the March 11 task force meeting.

NYC-WTC_000140677

Meeting agenda covering FEMA scope development, EPA efforts, and preparation for the March 11, 2002 task force meeting.

NYC-WTC_000140679 – NYC-WTC_000140683

Document outlining EPA's proposed approach to reinforce resident confidence regarding indoor air quality risks in Lower Manhattan.

NYC-WTC_000140684 – NYC-WTC_000140689

Attendance list for the April 18, 2002 EPA indoor air working group meeting at 290 Broadway.

NYC-WTC_000140690

Record of attendees and agenda items from an EPA working group meeting held at 290 Broadway regarding WTC air quality.

NYC-WTC_000140691

Technical excerpt describing micro vacuuming methods and ASTM standards for collecting samples from carpets and surfaces.

NYC-WTC_000140692

Cover page for the EPA work plan documenting the residential cleaning study conducted in Lower Manhattan.

NYC-WTC_000140693

Page labeled as Attachment B related to EPA Indoor Air Working Group meeting documentation.

NYC-WTC_000140694

Page labeled Attachment B from the EPA residential cleaning study documentation package.

NYC-WTC_000140695

Excerpt describing office space requirements, access agreements, and building safety inspections for the WTC cleaning study.

NYC-WTC_000140696

Details on testing eight different vacuuming and cleaning techniques in rental units to evaluate dust control effectiveness.

NYC-WTC_000140697

Description of specific vacuum models and negative air machine setups used in the residential cleaning scenario tests.

NYC-WTC_000140698 – NYC-WTC_000140700

Minutes from a March 21, 2002 meeting discussing task force activities, chemical screening criteria, and proposals to FEMA.

NYC-WTC_000140701 – NYC-WTC_000140702

Minutes from a March 21, 2002 meeting discussing task force coordination and chemical risk assessment strategies.

NYC-WTC_000140703

Plan detailing carpet shampooing scenarios, sampling protocols, and waste disposal methods for residential units.

NYC-WTC_000140704

Introduction to an EPA study evaluating cleaning procedures in residential and commercial spaces at 110 Liberty Street.

NYC-WTC_000140705

Page labeled as Figure 1 related to EPA Indoor Air Working Group meeting documentation.

NYC-WTC_000140706

Overview of eight proposed cleaning techniques and sampling protocols for the residential cleaning study.

NYC-WTC_000140707

Page labeled as Attachment A related to EPA Indoor Air Working Group meeting documentation.

NYC-WTC_000140708

Minutes from a March 20, 2002 meeting covering task force interactions and chemical risk characterization.

NYC-WTC_000140709

Step-by-step instructions for vacuuming ceilings, walls, carpets, and furniture during the WTC dust removal study.

NYC-WTC_000140710

Procedures for cleaning refrigerators, stoves, air conditioners, and other appliances during the residential study.

NYC-WTC_000140719

Minutes from the EPA Indoor Air Working Group meeting on March 20, 2002, discussing WTC dust cleanup and chemical risks.

NYC-WTC_000140720

Action items for agencies regarding FEMA funding requests and operational involvement in Lower Manhattan.

NYC-WTC_000140721

Attendee list for the EPA Indoor Air Working Group meeting held at 290 Broadway on March 28, 2002.

NYC-WTC_000140722

Notes on peer review processes and a pilot clean-up plan involving HEPA vacuuming and dust sampling.

NYC-WTC_000140723

Protocol for re-sampling 13 apartment buildings for asbestos and fibrous glass in residential dust.

NYC-WTC_000140724

Plan to test 15 new buildings for seven chemicals of concern including dioxin, lead, and asbestos.

NYC-WTC_000140725

Illegible handwritten notes from an EPA Indoor Air Working Group meeting held in March or April 2002.

NYC-WTC_000140726

Attendee list for the EPA Indoor Air Working Group meeting held at 290 Broadway on June 6, 2002.

NYC-WTC_000140727

Agenda for the EPA Indoor Air Working Group meeting on April 18, 2002 covering cleaning and peer review.

NYC-WTC_000140728

Notes on mold assessments, IRB approvals for tenant contact, and aggressive sampling methods.

NYC-WTC_000140729

Notes on FEMA submissions, HEPA vacuum supply, and the next meeting scheduled for June 18, 2002.

NYC-WTC_000140730

Notes on FEMA submissions, HEPA vacuum supply, and the next meeting scheduled for June 18, 2002.

NYC-WTC_000140731 – NYC-WTC_000140734

Attendance list and discussion notes from the May 23, 2002 meeting at EPA Region 2 offices regarding contaminants.

NYC-WTC_000140735 – NYC-WTC_000140744

Attendee list for the EPA Indoor Air Working Group meeting held at 290 Broadway on April 4, 2002.

NYC-WTC_000140745

Attendee list for the EPA Indoor Air Working Group meeting held at 290 Broadway on April 4, 2002.

NYC-WTC_000140746

Memo distributed to inter-agency contacts at EPA, state and local health, environmental, labor, and emergency management agencies regarding indoor air working group activities.

NYC-WTC_000140747

Document listing chemicals under consideration or proposed for deletion from the list of contaminants of concern.

NYC-WTC_000140748

Memo outlining the cancellation policy for WTC dust cleaning requests and HVAC inspection schedules to be completed by February 2003.

NYC-WTC_000140749

Technical reference comparing conductivity measurements scaled as Low, Medium, and High with citation to asbestos dust level data from 1994.

NYC-WTC_000140750 – NYC-WTC_000140751

Summary table of asbestos fiber concentrations in air and surface wipe samples from Liberty Street and background locations.

NYC-WTC_000140752 – NYC-WTC_000140753

Unreadable text fragment from a document within the EPA Indoor Air Working Group meeting files.

NYC-WTC_000140754 – NYC-WTC_000140755

Unreadable text fragment from a document within the EPA Indoor Air Working Group meeting files.

NYC-WTC_000140756

Unreadable text fragment from a document within the EPA Indoor Air Working Group meeting files.

NYC-WTC_000140757

Unreadable text fragment from a document within the EPA Indoor Air Working Group meeting files.

NYC-WTC_000140758 – NYC-WTC_000140759

Contact directory for NYC DEP, DOH, OEM, and other agencies regarding the World Trade Center indoor air working group activities.

NYC-WTC_000140760

Description of four testing protocols for residential and commercial vacuum cleaning methods to remove WTC dust.

NYC-WTC_000140761

Meeting agenda covering study issues, DEP updates, chemicals of concern, and FEMA submissions for the WTC cleanup.

NYC-WTC_000140762

Memo outlining procedures for cancelling cleaning requests and scheduling HVAC inspections within a ten-week timeframe.

NYC-WTC_000140763

Summary table of total requests, apartments cleaned, and buildings cleared for HVAC evaluation across multiple contractors.

NYC-WTC_000140764

Financial record listing payments and contract amounts for various contractors involved in the WTC dust cleaning initiative.

NYC-WTC_000140765 – NYC-WTC_000140766

Meeting agenda covering uncleaned units, project results, and the WTC dust cleanup program status.

NYC-WTC_000140767 – NYC-WTC_000140768

Unreadable text fragment from a document within the EPA Indoor Air Working Group meeting files.

NYC-WTC_000140769

Notes listing various vacuum types cleared for use in WTC dust cleanup operations.

NYC-WTC_000140770 – NYC-WTC_000140771

Agenda for the EPA Indoor Air Working Group meeting on March 13, 2002, covering WTC dust cleanup and data updates.

NYC-WTC_000140772

Meeting agenda including DEP updates, data reviews, and the WTC dust cleanup program status.

NYC-WTC_000140773

Agenda for the EPA WTC Indoor Monitoring meeting on August 8, 2003, focusing on contaminant results and communication plans.

NYC-WTC_000140774

Meeting notes discussing the EPA clean-up initiative scope, contractor coordination, and legal requirements for testing.

NYC-WTC_000140775

Illegible handwritten notes from an EPA Indoor Air Working Group meeting file.

NYC-WTC_000140776

Meeting agenda from April 13, 2003, covering WTC air quality projects, chemical assessment, and project results presentation.

NYC-WTC_000140777

Departmental feedback regarding cleaning triggers, clearance levels, and supervision requirements for the WTC contract.

NYC-WTC_000140779

Statistical summary of bulk and air samples submitted by building owners and results of asbestos complaints since 9/11.