NYC-WTC_000196959

NYC 9/11 Public Portal Document

Attn: Mr. Bernard Orlan Received: 3/5/02 9:00:00 PM N.Y.C. Board of Education ATC Group#: 6942 28-11 Queens Plaza North Analysis Date: 3/6/02 Long Island City, NY 11101 Fa.x: (212) 475-4122 Phone: (212)477-8941 Project: H.S. Of Economics And Finance

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area Non Asbestos # Structures Sensitivity Concentration Sample Colli me Analyzed Asb Type(s) 0.511-5 5p (S/cc) (S/mm-) (S/cc) ISotes

11 1824.00 0.0450 0 None Detected 0 0 0,0047 <22.24 <0.0047 6942 -9

12 1816.00 0.0450 0 None Detected 0 0 0,0047 <0.0047 6942 -10

13 0.0450 1824.00 0 None Detected 0 0 0,0047 <22.24 <0.0047 6042 -1 I

14 1816,00 0,0450 0 None Detected 0 0 0,0047 22,24 <0,0047 6942 -12

15 1808,00 0,0450 0 None Detected 0 I) 0,0047 <22,24 <0,0047 6942 -13

16 1808,00 0 0450 0,0047 <22,24 0 None Detected 0 0 <0,0047 6042 -14

17 1800,00 0,0450 0 None Detected 0 0 0,0048 <22,24 <0,0048 6942 -15

IS 1800,00 0,0450 0 None Detected 0 0 0,0048 <22.24 <0.0048 6942 -16

19 1800.00 0 0450 0 None Detected 0 0 0.0048 <22.24 <0.0048 6942 -17

MARK PEYSAKHOV MICHAEL A GORYCKI. Ph.D

Analyzed by: Approved by:

Disclaimer: The laboratory is not responsible for data reported in structures,'cc, which is dependent on volume collected by non-iaboratory personnel. This lab is only responsible for data reported in siructures/mm/ This report may not be reproduced, except in full, without written approval by ATC Associates nc. This report may not be used to claim product endorsement by NVLAP or any other agency of the U,S Government, This reports relates only to the samples reported above. Quality control data (including 95% confidence limits and laboratory and analysis’ accuracy and precision) is available upon request.

Accredited for NVLAP PLM/TEM #101187-0. NY State ELAP #10879

CITY_21MC100_003044286

NYC-WTC_000196960