NYC-WTC_000213307

NYC 9/11 Public Portal Document

. ATC Environmental, Inc. 104 East 25'th 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 ANALYSTS ■-BY -TRARTSMISSTON- ELECTRON' MTCROSCOPY (TEMP 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, 19S7

Sample Identification Analysis Parameters

Project/Site,; P.S. 234M, 292 .Greenwich St.., BY, NY TEM Sample No.: 5592 - 59096 Entire .School" Date Received:10/02Z01 Grid Openings Analyzed;_ 4

Project Sample Bo.: PS234M-ES-1P/2-02 Average Grid Openino; 106.00 urn '

Air Volume-. 1S20 liters Total Area Analyzed: 0.0450 mm2 SB s. Filter Type: MCE 25 rnin diam., Pore Size: 0.45 urn Analytical Sensitivity: 22.2 s/nim2 Effective Area: 335 mm2 0.0047 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed concentration Total Single Matrix Total. Struct. Filter Air Fibers Bxindles Clusters Struct. Struct >=5um Struct ZtnmZ Struct/cc ngm/m3

Chrysotile Asbestos ■ 0 0 ■;0’ • '■Q.'..','7 ■ ^o" ' 0 0.0' 0.0000 •0. V' An^hibole Asbestos 0. 0 •0 . ..;0 0. 0 0.0 0.0000 ,0

I...... S",7 ■- Ambiguous... 0 -0 ; ■: ^*3- sO' •, - " :0--' xP' 'Or / -Y ^0, G..-0 O.O'OOp-

•0- ■0.0 0.0000 ‘0 ■O?' .o.o. . ^oloo'bo ■ ••fe .' ■ J: A'Bo Identification ■ ■. ■ 0... ■ 0 ./o ''?... 0 0.0 .®i)iiooo,o ' N/A W' . .. ' ‘■■•'.‘'.o' Totals (All Struotures): 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 Amphiibole Asbestos Type: None detected The. .Analysis was, carried out in,,■.accordance.'with^ the approved TEM method.../ . ki This- Taboratpry.=;;,is'. in-;'pQrapliahce' withythe/c^al-rty: specif ied ■ f orrbhe^-met'hod

Analyzed by: Report Reviewed by:

Roman Peysakhov Michael A. Gorycki, Ph.D. '■ '■/■■.^.y't 'Directbr .bf-Electron Microscopy P/g£S ■ -A-

■I' .u w.-r-. •-■‘•vl’r*/-.•-’--u; ►=.-Lzer.-7- «• .“AV'-A<«.-

CITY_21MC100_000462066 NYC-WTC_000213307