NYC-WTC_000188650

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: 10/16/01

ASBESTOS FIBER ANALYSIS BY TRANSMISSION 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, 1907

Sample Identification Analysis Parameters

Project/Site: New Stuyvesant H.S., 345 Chambers St., NY, NY TEM Sample No.: 5698 61343 Exterior & Interior of Building & Roof Date Received:ip/15/ai Grid Openings Analyzed:__ 4

Project Sample No.: NSHS-EIR-lO/15-10 Average Grid Opening: 106.00 um

Air Volume :lS08]Ucprs Total Area Analyzed: 0.Q45O mm2

Filter Type: MCE 25 mm diam. , Pore Size: 0.45 uiti Analytical Sensitivity :22;2 s/mni2 Effective Area: 385 mni2 0■004 5 s/cc

FIBROUS PARTICULATES T^NALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct - Filter Air Fibers Bundles Clusters Struct. Struct >=5um Struct/mm2 Struct/cc nqm/ni3

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Ambiguous 0 0 0 c 0 0 0.0 0.0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 0.OOOC 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A No Identification 0 0 0 0 0 0 0.0 0.0000 N/A

Totals (All Structures) 0 0 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 accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

Marek Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

CITY_21MC100_003082231

NYC-WTC_000188650