Asbestos TEM air sample results, 86 Trinity Place, Sep 2001

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Laboratory report showing transmission electron microscopy results for asbestos in air samples from September 19, 2001.

NYC-WTC_000094524

Folder label: “86 TRINITY PLACE Block: 51 Lot: 13”

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NYC-WTC_000094524 © ENVIRO CONSULT O SMITHTOWN AVENUE RONKONKOMA, New Yori 11779 PHONE: (631) 580-3195 FACSIMILE: (63 1) 560-3195 ENVIROHEALTH ORG ELAP # 11681 NVLAP #2005310 SCIENCE TEM AIR SAMPLE RESULTS CLIENT: ANTS, INC. PROJECT NAME: AREA: CLIENT #: Sampic Location Tech Clean American Stock Exchange 86 Trinity Main Trading Floor 00-10233 Start SAMPLE DATE: RECEIVED DATE: SAMPLER: CUSTODY #: September 19, 2001 Page 1 of 3 September 21, 2001 L, Savarese/C. Gilbest B-04-06 End | Run Time Flow Rate] Volume Filter Conc, Sensitivity Air Conc, a OO minutes Liters Stmm2 Shc Floor Post 5 #10 6:20 | 8:20 1200 0.0 0.0041 <Sensitivity ( TEM F2 | Trading Floor Post 12 #14 Main T: rade Floor Post 8, Section 1 _ _ .. 46:30 5 8:30 F120, 6:35 | 8:40 0.0041 <Sensitivity | 1200. - 0.0 1250 0.9 0.0039 <Sensitivity TEM F4 | Main Trade ¢ Flear Post 9, Section E 6:25 3 8:42 1370 0.0, 0.00335 <Sensitivity Main Trade Floor, Upper Level, Section E, Monitor 16 Red Room Post 21, MF 39 ; 6:30, $ ] 1 7:00 9:00 | “4 145. 1450 0.0 9.0034 <Sensitivity 1200 0.9 0.0041 <Sensitivity ed Room Past 22, Section A. d Room Post 22, MF 15 9:15 | 6:45, 7:00 nom $200. | 0.0 0.0041 <Sensitivity | weet AA 1350 0.0 0.0035 <Sensitivity 9:20 | 11:20 1200 0.0 0.0041 935 | 1130 12530 0.0 0.0059 O41 { <Sensitivigy <Sensitivity ‘TEM FI1! 15th Floor 9:40 | 11:40 | 10 4200 0.0 0.0041 <Sensitivity Analyzed by: S=Asbestos siructures,coecubic centimeters, mm=millimeter <= fess than, Flow Rate in liters per minute Samples were analyzed using Philips 400T Transmission Electron Microscope. Asbestos identification is determined by the morphology, visaal Selected Aves Electroa Diffraction (SAED), and Concentration oa the. fil the effective filter are Elemental Analysis using an Energy Dispersive X-ray Anal lyzer (EDAX). ‘The data pertaining to these calculations can be found on the Asbestos Count Sheet. The aic filtec conceatra ter is calculated by taking the aumber of asbestos structures and dividing by the area analyzed. Air concentration is calculated by enltiplying a (EFA) by the filter concentration and then dividing by the volume of air collected in cubic centimeters (ec). tiun relates only to air fiber content. Wheo samples are submitted by aw outside agency fur analysis, Enviroscience. can auly guarantee the accuracy of the filter concentration. This report may not be reproduced without the express permission of Enviroscience. This ceport can not be used to claim endorsement of produc The samples collected ts by NVLAP or any agency of the U.S. Govecnment. action is considered complete according to EPA 40 CFR 763. in the response action area demonstrated a filtec concentration of asbestos Jess than seventy structures per square millimeter. This cesponse 9 structures per square millimeter is only applicatie to the area analyzed. Test results oniy reflect conditions at the time samples were taken. 99/28/2081 18:14 5315682195 ENY TROSCIENCECNSL. TAM PAGE 13 NYC 9/11 Public Portal Document

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NYC-WTC_000094524Source: NYC Law Department, mirrored locally

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