Expert Reports
Mechanical Engineering Report from Goldman Copeland
Our engineer found the party wall between A and B was full of plaster/concrete debris.
They write, "Our survey determined that air leakage through the demising wall, significant exhaust imbalances, and a lack of make-up air create persistent negative pressure in unit 6A-N. This condition drives odors and particulates from unit 6B, and the corridor, into 6A-N.
The only effective and durable solution is to reconstruct the demising wall with proper
barriers, apply advanced sealing, add exhaust to unit 6B. Additionally the building as whole would benefit from implementing a base-building make-up air system (ERV) to establish balanced airflow throughout the building to replace the existing inefficient and problematic corridor exhaust setup.
Ed has decades of experience and was responsible for air monitoring at Ground Zero. This report includes a test of what is coming into our apartment through the outlets: Plaster dust, quartz (silicates), soot, rust, and a high percentage of our neighbor's skin cells.
Ed writes, "the adjustments to the exhaust ventilation have not mitigated the air quality problem.
1. Air still flows strongly from 6B through the shared wall to 6NA. The levels of PM2.5
increased during this survey compared to the January 2026 tests.
2. The are still food odor and air quality problems in 6NA that follow a pattern each day and are not a result of any activities in 6NA. The pattern is present when the apartment is
empty.
3. The apartment 6NA levels exceed the reported outdoor range. This condition Is unhealthy.
4. There is a strong negative pressure in apartment 6NA and the 6th floor. This pulls air
through 6NA and from 6B and through the walls from outside the building. This negative
pressure is excessive.