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← Document results/DEP Box 48/345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083375 395 South End Ave, Building #600
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Chain of custody for bulk sampling at 395 South End

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Document tracking environmental samples collected from Building #600 at 395 South End Avenue on January 2, 2002.

NYC-WTC_000121516–000121803

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083375 395 South End Ave, Building #600

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NYC 9/11 Public Portal Document

104 East 25th Street New York. New York 10010 www.atc-enviro corn 212 353.8280 Fax 212.353 8306

September 27, 2001

ALC Environmental 115 W. 30th Street New York, NY 10001 Attn: Mr. Joshua Sarett Re: Report of TEM Analysis

Dear Mr. Sarett: (TEM) results of transmission electron microscopy Following are the 5571: samples from our Group No. analysis of nineteen PCM air

Client: Mid -State Avenue, Plaza 600 Project Name: 395 Southend Location: Various Floors 09/26/01 Samples received in TEM Lab: transmitted to you and document the data These results will confirm performed in strict conformance w1thh4the today. The analyses were method 7402, issue 2, August 15, methodology of the NIOSH were examined at from each of the samples Forty grid openings (approximately 1,000X and 10,000X) relatively low magnifications between than sum in length and widths for structures greater -to-width ratio greater 251m and 3um, and having a length be observed by PCM structures would be large enough to These were detected in analysis. Asbestos and non -asbestos proportions: s the samples in the following prop

chrysotile gypsum cellulose F/CC as sample Asbestos number

1 0.0% 83.8% 16.2% 43.7% 0.0 .0 2 0.0% 56.3% 0.0 (.-)~, 0 . 0% 71. 4 % 28.6 0 35.7% 0.0 3 0.0% 64.3% 5 0.0 6 0.0% 100.0% 0.0% 0.002 v' 25.9% 55.6% 18.5% 31.1% 0.0 68.9% g 0.0% 0.003 9.4% 90.6% 0.0% 76.7% p.0 13 0.0% 23 . 3 % 0.0% 70.0% 30.00 0.0 14 100.0% 0.0% 0.0 15 0.0% 0.0 0.0% 100.0% 0.0: 16 0.0% 0.0 17 0.0% 100.0% 0.0 18 0.0% 100.0% 0.0%

NYC-WTC 000121528

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NYC-WTC_000121528Source: NYC Law Department, mirrored locally

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NYC-WTC_000121804 · Box DEP Box 48

Memo from a DEP contractor reporting on visual inspections of ventilation systems for WTC dust contamination at 395 South End Avenue.

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