NYC-WTC_000188627

NYC 9/11 Public Portal Document

ATC ENVIRONMENTAL, INC, APPROVED NY STATE DOH ELAP # 1Q879 104 East 25th Street ACCREDITED NVLAP Lab Code # 1187 New York, NY 10010

Summary of TEM Results

N.y.C. Board of Education DATE; 10/08/01 28-11 Queens Plaza North Long Island City, NY 11101 Mr. Bernard Orlan

Project/Site Identification: New Stuyvesant H.S., 345 Chambers St., NY, NY Exterior of Building & Roof CONCLUSION:

STATISTICAL SUMMARY

1) Inside Samples Asbestos Concentration TEM# Project # Volume{1) S/mm*2 S/cc nqTri/Tn*3 Average= N/A N/A N/A 2) Outside Samples Asbestos Concentration TEMti Proiect 41 Volume(1) S/mm^2 S/cc ngn/tn^B 5639- 60566 NSHA-EBaR-10/8-01 1908 0.0 0.0045 * 5639- 60567 NSHA-EB6cR-10/8-02 1935 0.0 0.0044 * 5635- 60568 NSHA-EB&R-10/8-03 1917 0.0 0 . 0045 * 5639- 60569 NSHA-EB5cR-10/8-04 1881 0. 0 0.0046 * 5639- 6057C NSHA-EBS.R-10/8-05 1899 0.0 0.0045 * 5639- 60571 NSHA-EB&R-10/8-06 1917 0.0 0.0045 * 5639- 60572 NSHA-EB&R-10/e-07 1944 0. 0 0.0044 Average= 0.0 0.0045 0 3) Blanks Asbestos Concentration TSM# Project # S/mm*2 S/cc nqm/m''3 5639- 60573 NSHA-EB&R-10/8-08 Not Analyzed 5639- 60574 NSHA-EB&R-10/8-09 Not Analyzed 5639- 60575 NSHA-EB£tR-10/8-10 Not Analyzed Average^ N/A N/A M/A of T - Statistic ; N/A

None detected; concentration equivalent to analytical sensitivity assigned.

This test report relates only to the specific items cited in the analysis. The analysis was carried out according to the approved TEM method. The laboratory is in compliance with the quality specified for the method.

This report must not be used by the client to claim product endorsement by NVLAP or any agency of the U.S. Government.

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

CITY_21MC100_004151140

NYC-WTC_000188627