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Air monitoring report cover sheet, 345 South End Ave, 2001

Machine-extracted title · confidence 90%

Cover page for an air monitoring and bulk sampling report for Building #200 at 375 South End Avenue.

NYC-WTC_000095478–000095630

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100

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NYC 9/11 Public Portal Document 10L Eat 25tH 'Dtre6t New fork, Ncw York 10010 www.atc-envtro corn

!ATCASSOC I ATES I N C. 212.353.8280 Fax 212.353.8308

September 26, 2001

ALC Env i r -; it;lant -e l L5 W. 30th :tzper_ .w - -. &e'' Attn: Mr.

Re: Report of "EM Alysis

.ear Mr (TEM) eion electron microscopy Ed lowing are the results of tra.ism from our Group No. 5556: ana.vsis of eleven PCM ai:c samie2

C1ieni n-4 -Mate Avenue Project Name: 345 and 355 Southend 7.Cu and Apartments, Buildings 100 Location: Hallways samples received in TM Lab: 09/26/01

document cj._ iata transmitted to you These results will confirm and the performed in strict conformance with today. The analyses were Issue 2, August 15, 1994. methodology of the NICSH method 7402, examined at of the samples were Forty grid openings from each(approximately 1,000X and 10,000:{) relatively low magnifications 0.25um :n length and widths between for structures greater than 5um -width ratio greater than . .1. and 3ut:1, ar.d having a length-to by PCM large enough to be observed Theses structures would be structures were detected n analysis. Asbestos and non -asbestos proportions: the samples in the following

cellulose fiber F/CC as sample chrysotile gypsum cr lass Asbestos number

3 0.0% 93.8% 0.0% -6.2% 0.0 4 22.2% 77.8'% 0.0% 0 .0% 0.005 0.0% 23.1'% 0-0 0.0% 76.9% 5 0.0% 45.0% 0.0 6 0.0% 55.0's 9.5% 14.3% 0.0 8 0.0% 76.2% 77.3% 9.1% 13.6% 0.0 13 0.0% 0.0% 0 .0 14 0.0% 100.0% 0 .0% 0-0 100.0% 0.0% 0.0% 17 0.0% 27.7% 0.001 0.0% 18 3.65 68.7% 0.0 19 0.0% 66.7% 0.0% 33.3% 20 0.0% 42 .0% 0.0% 58.0% 0.0

NYC-WTC 000095487

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NYC-WTC_000095487Source: NYC Law Department, mirrored locally

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NYC-WTC_000121364 · Box DEP Box 48

Chain of custody for air samples collected at 345 South End Avenue buildings in late January and early February 2002.

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