Asbestos fiber analysis cover sheet, P.S. 234M, Oct 2001

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010

N.Y.C. Board of Education Approved N.Y. State ELAP #10879 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY 11101 Report Date: 10/02/01'

ASBESTOS FIBER ANALYSIS BY.TRANSMITSXQN ELECTRON 'MICROSCOPY (TEM) With Fiber Identification by Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method: AHERA .Final Rule, EPA Federal Register ’{'40 CFR,’ Part 763), Vol. 52, No'. 210., October 30, 1987

Sawle Identification Analysis Parameters

Project/Site: P.S. 234'M, 292 Greenwich St., NY, NY TEM Sample No^; 5592 - 59909 Entire School Date Received: 10/02/01 Grid Openings Analyzed; 4

Project Sample No.: PS234M-ES-10/2-15 Average Grid Opening: 106.00 um

Air Volume: 182C liters Total Area Analyzed: 0.0450 nim2

Filter Type: MCE 25 mm diam. , Pore Size: o7'4S um Analytical Sensitivity: 22.2 s/mm2 Effective Area: 385 mm2 0.0047 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct. >'=5um Struct/mm2 Struct/cc ngm/mS

Chrysotile Asbestos.' ,. 0 .0 ■ ^'Q ■ 7.. it: ■' ,0 . 0 Q-O'.. o.oboo . 0

Amphibole Asbestos 0 0 0 /• .. 0. 0 6 - 0.0 0.0000 0.\

«■,? .". '.Ambiguous '0>--: 0 0? ;!oi . o.o' 0,. obod".. •''Y//

■’ /'Total .asbestos .('includes. amblTOOus struotuies’)'.’;-- .’.'W-u,.-;-; .'b ■ ■ • - u:. 'r.;;, ; • ■ ■■0; . VQ. o.d ,0.0000 .0 •. (I- Non-Asbestos.,. ...; .'0 ' .0 : P... ,0.0 .;.A..oooo .fji/?.'. Bo Identification■’ 0 . O ' ' l-i&Sv/'L,'"" ■ -0 •. .’"•'o ■ ■ .0..0 N/A S'.-.;,-; /Y'■■.y..--.. Y.

i''’/- ?■-.Total's.'.''(Al'i'.'Structures.). .7. .0 ’ b'-' ■■ 0.0 0.0000 N/A •• The estimated uncertainty of this analysis.is 1 standard deviation.

Non-asbestos, fiber i.d.' (EDS./SAED.) None detected Amphibole Asbestos Type:' None detected'?/.,,.

The Analysis was carried out in'Jaccordahce-with the approved TEM methodi/'/ :■ This.-.'labpra'tory,is,..in "^compliance, •'■with/the,'".quality specified for the; method.. ■

'Analyzed by. Report Reviewed by;

/.Y'‘’ ’ ' Marek Peysakhov I'-'- ' ■ ■ . .Michael A. Gorycki, Ph.D. 3 ../ 'Bi^cector .-of /Electron. MicroGCopy • - ■ ; ■ ■' 'u

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CONFIDENTIAL, CITY_21MC100_003390292 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178637