List of shaft locations in Lower Manhattan, undated

NYC 9/11 Public Portal Document

DRAFr-5/14/02

[Date]

Marc Wolinsky, Esq. Wachtel 1, Lipton, Rosen & Katz 51 West 52“' Street New York, New York 10019

Re: New York City Department of Environmental Protection (“DEP”) / September 11, 2001 Terrorist Attacks on World Trade Center / New York City Water Supply System

Dear Mr. Wolinsky:

I am writing in response to your letter dated April 23, 2002, concerning the above mater.

I am treating your letter as a request for agency records under the Freedom of Information Law (New York Public Officers Law, Article 6) (“FOIL”).

Prior to receiving your letter, I was advised by Lawrence Kahn of the New York City Law Department that your client was primarily interested in any records compiled by DEP showing water pressure levels in the New York City water supply system, on September 11, 2001, in the vicinity of the World Trade Center. I asked our Bureau of Water and Sewer Operations to collect any such records and I am pleased to enclose, for your information, a series of tables showing the water pressure levels recorded at the four (4) City water shafts serving Manhattan below 14* Street, on September 11, 2001. Each table covers a particular shaft (in some cases, there are multiple tables for a single shaft because that shaft contains several separate regulators). Each table shows a pressure reading (in pounds per square inch) starting at 12:00 AM on September 11, 2001, and at 10 minute intervals thereafter. You start with the entry on the first line of the second column (at 00:00 or 12:00 AM) and then proceed across to the right, and then down to the next line in the same manner. Thus, looking at the table for Shaft 21 as an example, there is a reading at midnight (12:00 AM) of 60.9 psi, followed by a reading 10 minutes later (12:10 AM) of 60.9 psi; followed by a reading 20 minutes later (12:20 AM) of 60.9 psi; followed by a reading 30 minutes later (12:30 AM) of 61.5 psi; followed by a reading at 12:40 AM (first entry on next line) of 60.8 psi; and so on.

I hope that this information is helpful. If there are additional records you are interested in, I would appreciate your submitting a further letter, narrowing your request so that it is as specific as possible. General requests are difficult to fulfill, and usually entail significant delays given the level of staffing available for records searches. DEP reserves its right to charge copying fees under.FOIL (25 cents per page) for any additional records that are provided, and otherwise reserves all of its rights and remedies under FOIL in relation to any further request

NYC-WTC_000152664