NYC-WTC_000202618

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: 10/19/01

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

Sample Identification Analysis Parameters

Project/Site: P.S. 13QM, 143 Baxter St., NY, NY TEM Sample No.: 5726 61664 Throughout the School Building Date Received;1O/18/C1 □rid Openings Analyzed: 4

Project Sample No.: OS Average Grid Opening: 106,00 urn

Air Volume: 1906 liters Total Area Analyzed: 0,0450 itim2

Filter Typ e: .MCE 25 mm diam. , Pore Size: 0.45 urn Analytical Sensitivity: 22.2 s,'^mm2 Effective Area; 185 tnTn2 0.0045 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matr-x Total - Struct Filter Air Fibers Bundles Clusters Striict^Struct >-5mT Struct,'niiT.2 Struct/cc ngm/m3

Chrysotile Asbestos 0 0 0 0 0 0 0,0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0,0 0.OODC 0

Ainbiguous 0 0 C 0 0 0 0.0 0.0000 0

Total asbestos (includes ambiguous structures] 0 0 0,0 0.0000 0 Non-Anfcectoc 0 0 0.0 0.0000 K/A No Identification 0 0 0 0 0 0 0.0 0.0000 ^7A

Totals (All Structures] 0 0 0.0 0.0000 E7A The estimated uncertainty of this analysis is 1 sta-udard deviation.

Ncn-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 Revievzed by:

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

CITY_21MC100_003273859

NYC-WTC_000202618