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← Document results/DEP Box 48/345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083376 385 South End Avenue, Building #500
Document / 53 pages

Chain of custody for bulk sampling at 385 South End

Machine-extracted title · confidence 95%

Document tracking environmental samples collected from Building #500 at 385 South End Avenue on October 22, 2001.

NYC-WTC_000121409–000121461

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083376 385 South End Avenue, Building #500

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NYC 9/11 Public Portal Document

104 East 25th Street New York. New York 10010 www.atc-env ro.cOm 212.353 8280 Fax 212 353.8306

ASSOC IATF S I NC.

October 8, 2001

ALC Environmental 115 W. 30th Street New York, NY 10001 Attn: Mr. Joshua Sarett

Re: Report of TEM Analysis

Dear Mr. Sarett: microscopy (TEM) Following are the results of transmiss..on electron samples from our Group No. 5635: analysis of tour PCM air

Client: Mid -State Project Name: 385 South End Ave., Bldg. 500 Location: Various Apts. Samples received: 10/08/01 transmitted to you These results will confirm and document the data conformance with the today. The analyses were performed in strict 1994. methodology of the NIOSH method 7402, Issue 2, August 15,

examined at Forty grid openings from each of the samples were (approximately "i,000X and 10,000X; relatively low magnifications Sum in length and widths between 0.25um for structures greater than 3:1. than and Sum, and having a length -to-width ratio greater by PC4 to be observed These structures would be large enough analysis.

in the samples in the Only non -asbestos structures were detected following proportions:

gypsum cellulose F/CC as sample Asbestos

1 100.0% 0.0% 0.0 3 100.0% 0.0% 0.0 100.0% 0,0 5 0.0% 57.4% 0.0 6 42.6%

F/CC as asbestos. As a consequence, no sample exceeds 0.01

NYC-WTC 000121418

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NYC-WTC_000121418Source: NYC Law Department, mirrored locally

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NYC-WTC_000121462 · Box DEP Box 48

Record documenting the transfer and custody of air samples from Building #500 at 385 South End Avenue collected on October 22, 2001.

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