Disclosed Municipal Investigation Records • 9/11 Ground Zero

NYC Ground Zero Air Quality Record Explorer

Interactive investigative ledger analyzing declassified internal agency memos, toxicological field logs, and public reassurance transcripts released under Mayor Mamdani.

MEMO-402 DECLASSIFIED MUN-DISCLOSURE
October 14, 2001

Memo 402: Lower Manhattan Particulate Summary & Ambient Toxicity

Origin: Environmental Protection Agency (EPA) Region 2 • Emergency Response Branch
Internal Document Finding CONFIDENTIAL

"27 of 777 Lower Manhattan air samples exceed AHERA asbestos safety levels; bulk debris samples show up to 4% chrysotile asbestos. Benzene levels at debris perimeter exceed OSHA Permissible Exposure Limits (PEL)."

Ref: EPA WTC Sampling Log Doc #01-402, Bates NYC-004812
Contemporaneous Public Assurance PRESS STATEMENT

"The air is safe to breathe and their water is safe to drink... We have not seen any reason — any readings that have indicated any health hazard."

Ref: EPA Official Public Press Release, Sept 18 & Oct 2001
Air Particulate & Toxicological Measurements (Sampling Record) Source: Testing Sites near West & Fulton St
Investigative Analysis: Disclosed testing manifests show persistent particulate spikes and localized benzene concentrations directly contradicting blanket assurances provided to returning Lower Manhattan workers, residents, and recovery crews.

Timeline: Internal Awareness vs. Public Disclosures

SEPT 2001 – 2026 DISCLOSURE
Primary Sources, Official Records & Verification Citations
Research Date: September 2026. Document repository compiled from municipal release archives, federal monitoring logs, and congressional testimonies regarding post-disaster air quality.