WTC building exterior cleaning inquiry, Apr 2002

NYC 9/11 Public Portal Document

Avaltrot uagits ill;"/' 99: 99999 999 From: LaGrotta, Robert Sent: Wednesday, April 17, 2002 7:57 AM To: Gilsenan, Michael Cc: Avaltroni, Robert; Heckler, Philip; Rabich, Sophia; Patel, Pravin; Collins, Betsy Subject: RE: American Express Building

This is a separately sewered area. They will have to catch the runoff wastewater and direct it into the sanitary sewer otherwise it will go into the storm sewer and the river. They should be in contact with Sophia Rabich of my staff concerning sewer discharge approvals. She can be reached at Ext. 4707. —Original Message From: Gilsenan, Michael Sent: Tuesday, April 16,2002 5:05 PM To: Collins, Betsy 001 Cc: Avaltroni, Robert; LaGrotta, Robert Subject: FW: American Express Building

Betsy/ Bob Fyi —Original Message— From: Radhakrishnan, Krish Sent: Tuesday, April 16,2002 2:59 PM To: Gilsenan, Michael Subject: FW: American Express Building

FYI

—Original Message— From: Lutchmedial, Carlstien Sent: Tuesday, April 16,2002 7:32 AM To: Radhakrishnan, Krish Subject: American Express Building

On April 15, 20021 met with Chris Sexton of Total Safety Consulting (212) 640-9136 and Michael Handler of Turner Construction 212.786.1480. The purpose of the meeting was to discuss the planned washdown of 1,2, 3,4 World Financial Centers. At this time, all the decontamination of the exterior had been completed. Samples had been collected for ACM and were negative.

Their concern was that when the washdown starts they do not violate any of DEP regulations. Water would be trucked in from outside so as to observe water restrictions. This they felt was the right thing to do, even if DEP allowed them to used the pipe borne supply. The washdown is a plain washing to give the entire clean up some finality. It was agreed that some soil sampling would be done where the run off is expected. So as to ensure that no form of contamination get into the sewer system. A review of the ACM sampling done revealed that only 4 samples were collected from each building (total of 16). Most had trace ACM. I requested that more sampling be done as 4 samples are not sufficient to represent the enormity of the buildings. However, they said that samples may be hard to find. In the end it was agreed that more samples would be taken. If the additional samples are negative, then the cleanup can go on as planned. A look at some of the small window ledges revealed that they were free of debris.

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