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Chain of custody form for air monitoring, 345 South End

Machine-extracted title · confidence 95%

Chain of custody documentation for bulk sampling and air monitoring at 345 South End Avenue Building 100.

NYC-WTC_000117536–000117549

Folder label: “375 345 SOUTH END AV 1083378, 16/100

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NYC 9/11 Public Portal Document

104 Ens; 25th StreE _ ~, New York. :Vrw York 1001 wvvmatc•envvo cor- 212.353.82E s: Fax 212.353.830+_

September 26, 2001

a_nt:~ l C Environt• . 30rh yam_ _:- ttn: Mr. _

.a: Report c_` TEM i._;>.i.yeis

Dear Mr. (TEN) *ra%ism' cion electron microscopy ` po]lowing are the results of from our Group No. 5556 eleven PCM a' : s r..les ana.-vs ls of

Cliefl- Southend Ave:zuz • project Name: 345 and 355 Buildings 100 and 200 and Apartments, Location: Hallways 09/26/01 Samples received in TEM Lab: transmitted to you and document the data These results will confirm in stric ce w199ethe today The analyses t 2 coAugustnl5 , NIOSH method 7402 Issue methodology of examined at from each of the samples were Forty grid openings (approximately 1,000X and 10,000X) relatively low magnifications between 0.25um than Sum in length and widths for structures greater length-to -width ratio greater than 3:1. and 3uta, arid having a to be observed by PCM structures would be large enough structures were detected i.n These Asbestos and non -asbestos analysis. the samples in the following proportions:

cellulose fiber F/CC as chrysotile gypsum Asbestos sample glass number

0.0% 6:2% 0.0 0.0% 93.8% .. . . .. ......... ............... .. . .. ... .

3 0.0: 0.0% 0.00 22.2% 77.9- 0.0 4 0.0; 23.1% 0.0$ 76.9% 0.0 S 55-0% 0.0% 45.0% 6 0.0- 14.3% 0.0 76.2% 9.5% 8 0.0% 13.6a 0.0 77.3's 9.1% 13 0.Os 0.0% 0.0 100.0% 0.0% 14 0.0%_ 0.0% 0.0 100.0% 0.0a 0.0% 0,001 17 68.7°s 0.0- 27. 7 's 18 3.6% 33.3's 0.0 0.0% 19 0. 0 0% 66.7"% 58.0% 0.0 0.0`9 42.0% 0.0: 20

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NYC-WTC_000117543Source: NYC Law Department, mirrored locally

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