NYC-WTC_000188624

NYC 9/11 Public Portal Document

ATC ENVIRONMENTAL, INC. APPROVED NY STATE DOH ELAP # 10879 104 East 25th Street ACCREDITED NVLAP Lab Code #1187 New York, NY 10010

Summary of TEM Results N.y.C. Board of Education DATE : 10/04/^ 28-11 Queens Plaza North Long Island City, NY 11101 Mr. Abdi Zarrabi

Project/Site Identification: Stuwesant H.S., 34 5 Chambers St., NY, NY Outside Bnildincr CONCLUSION:

STATISTICAL SUMMARY

1) Inside Samples Asbestos Concentration TEM# Pro-iect # Volume(1) S/mm*‘2 S/cc Average= N/A N/A N/A 2) Outside Samples Asbestos Concentration TEM# Proiect # Volume(1) S/mm*‘2 S/cc ncnn/in*3 5598- 59979 03 1853 0.0 0.0046 * 5598- 59980 04 1853 0.0 0.0046 * 5598- 59981 05 1853 0.0 0.0046 * 5598- 59982 06 1862 0.0 0.0046 * 5598- 59983 07 1862 0.0 0.0046 * Average® 0 ■ 0 0.0046 0 3) Blanks Asbestos Concentration TEM# Prelect # S/nim*’2 S/cc nqm/m^3 5598- 59977 01 Not Analyzed 5598- 59978 02 Not Analyzed Average® N/A N/A N/A 4) Value 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_003081991

NYC-WTC_000188624