Correspondence requesting the basis for acoustical calculations determining noise levels in the emergency generator room.
NYC-WTC_000167731Folder label: “Mayor's Office of Emergency Management ®Emergency Generator Noise”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
K F. ’’ gS TTiFM FWAOF RAVL'EN '’ORRE’L AECHHECTS
Shen February 25.1998 I Milsom & Wilke inc ■ncHNOLoav cows jltws in telecommunications AUDOVISUAU & acolistcs 411 Filth Avenue, New Yotk. NY IflfUfi (2U) ll^-ewio Fax (212; Mr. Joseph Aliotta Swanke Hayden Connell Architects 295 Lafayette Street New York, NY 10012
Re: Mayor’s Office of Emergency Management Emergency Generator Noise
Dear Joseph,
In response to the request by Silverstein Properties to define the NC level in tenant space surrounding the 7'^ floor equipment room when the emergency generators operate, w'e offer the following comments.
Our calculations indicate noise criteria levels in spaces immediately adjoining the generator room will be about NC-50 to 55. This level is higher than a typical fan room containing a packaged air conditioning unit which is usually NC-40 to 45.
The generators produce a roaring sound like a racing truck engine ratha* than the heavy rumble associated with AC units. The loudness of the generators is, subjectively, about 40% greater than the AC unit.
But the important consideration is that unlike an AC unit, the generators will not operate except during emergencies and after-hours or weekends for monthly testing.
Your very truly,
SHEN MILSOM & WILKE. INC,
Denis Milsom, VP
Project #5149
ec; Michael Maybaum/Cosentini
NEU ,• O k K • W A S II I N A r O N . D C * L, R I II A • CIlICAf. 0 • 11 O N t.; K O N C. * 1< U A I. .A I, 11 M I' H
NYC-WTC_000167731
OCR can misread numbers and units. Confirm readings against the page image before using them.
Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.
NYC-WTC_000171246
Engineering firm report detailing noise criteria calculations for emergency generators in the Mayor's Office of Emergency Management space.
1 shared topics · Same agency, volume and box · similarity 0.951
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167727
Letter submitting noise level data and comments regarding the 23rd floor emergency generator room in response to OEM requirements.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.949
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167730
Correspondence requesting the basis for acoustical calculations determining noise levels in the emergency generator room.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.940
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000173475
Letter providing comments on submitted architectural plans for the Mayor's Office of Emergency Management.
Same agency, volume and box · similarity 0.887
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167750
Inquiry regarding the resolution of a security issue and confirmation of the selected vendor for the Mayor's Office of Emergency Management project.
1 shared topics · Same agency, volume and box · similarity 0.886
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000173529
Letter from law firm to City regarding administrative matter related to 7 World Trade Center.
1 shared non-person entities · Same agency, volume and box · similarity 0.878
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000172389
Correspondence from engineering firm regarding 7 World Trade Center Mayor's Office of Emergency Management project.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.870
machine-extracted · confidence unavailable · Check page ↗1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.869
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000172539
Engineering consultant memorandum dated August 2, 1999 related to 7 World Trade Center Mayor's Office of Emergency Management.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.867
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000174096
Memo detailing a generator load test conducted on August 31, 1999, identifying minor problems with pressure controllers and ATS switches at the Mayor's Office of Emergency…
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.867
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000138209
Archival folder label for Department of Environmental Protection forms related to World Trade Center activities from 1996 to 2001.
Similar document embedding; no shared entity or topic indexed. · similarity 0.870
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000168976
Page from a file containing fire reports and records associated with 7 World Trade Center.
Similar document embedding; no shared entity or topic indexed. · similarity 0.867
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000171246
Engineering firm report detailing noise criteria calculations for emergency generators in the Mayor's Office of Emergency Management space.
Similarity score 0.975 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167727
Letter submitting noise level data and comments regarding the 23rd floor emergency generator room in response to OEM requirements.
Similarity score 0.974 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167730
Correspondence requesting the basis for acoustical calculations determining noise levels in the emergency generator room.
Similarity score 0.970 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167750
Inquiry regarding the resolution of a security issue and confirmation of the selected vendor for the Mayor's Office of Emergency Management project.
Similarity score 0.942 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167727
Letter submitting noise level data and comments regarding the 23rd floor emergency generator room in response to OEM requirements.
Similarity score 0.941 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000167750
Inquiry regarding the resolution of a security issue and confirmation of the selected vendor for the Mayor's Office of Emergency Management project.
Similarity score 0.932 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Machine-extracted building matches; verify each source. Buildings, never households.
Readers open these alongside this record — through an Ask answer, the same folder, or indexed similarity. Not a claim they are about the same event.
Engineering firm report detailing noise criteria calculations for emergency generators in the Mayor's Office of Emergency Management space.
Similar indexed content
NYC-WTC_000167727
Letter submitting noise level data and comments regarding the 23rd floor emergency generator room in response to OEM requirements.
Similar indexed content
NYC-WTC_000167730
Correspondence requesting the basis for acoustical calculations determining noise levels in the emergency generator room.
Similar indexed content
Letter providing comments on submitted architectural plans for the Mayor's Office of Emergency Management.
Similar indexed content
NYC-WTC_000167750
Inquiry regarding the resolution of a security issue and confirmation of the selected vendor for the Mayor's Office of Emergency Management project.
Similar indexed content