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 24, 2001.

NYC-WTC_000094525

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

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NYC-WTC_000094525 ENVIROSCIENCE, CONSULT. ‘ANTS, INC. 50 SMITHTOWN AVENUE RONKONI KOMA, NEW YORK 11779 HONE: (63 1) 5803191 ACSIMILE: (63 1) 580-3195 YAWW..ENVIROHEALTH.ORG TEM AIR SAMPLE RESULTS PROJECT NAME: Tech Clean AMEX 22 Thatnes Third Floor 00-10233 ~ SAMPLE DATE: RECEIVED DATE: September 25, 2001 SAMPLER: CUSTODY &: September 24, 2001 emnnaneee a na Arabient B. Gallagher 8-05-03 FLAP# 11681 NVLAP #20053 0 rn a a i i Sample #: _. _...... . Sample Location _.|_ Start Eni | Run Time} Flow Ratel Volume | Filter Conc.| Sensitivity _minutes Avg. Liters Sénm2 Sicc Sicc ete ee tener ee mt ee nee “—-+f 4 i TEM At8|By ele wator 1633511920; 165 | 7 | 185 0.0 G.0042 | <Sensitivity fo? TEM A19) TEM A20/| Section 3, C/S 9 16:40 | 20:44| 244 | 8 | 4952 0.0 0.0025 16:37: 20:40; 243 | 9 | 2187 0.0 0.0022_| <Sensitivity Sensitivity | TEM A21 | Computer . TEM _A22: Spear 50 aed tateeal ates steententet einen 0.0033 0.0034 | <Sensitivity | po EN. LEE, or room _. 37:05 | 20:47 172, | 8.5 1462 0.0 <Sensitivity 18:25 - wef 9G? 1 ah mee hfe AM EIN fd 6315863195 4 ned ee. aww LS wee Analyzed by: Samptes were analyz: Diffraction (SAED), and E Concentration on the filter the effective filter area (EF The data pertaining to dh S=Asbestos structures.cc=cubic centimeters, mm=milfimeter <= less then, Flow Rate in liters per minute ed using Philips 400T Transmrdssion Electcon Microscope. Asbestos identification is detennined by the morphology, visual Selected Arca Electron fementat Analysis using an Energy Dispersive X-ray Analyzer (EDAX). is calculated by taking the number uf usbestus structures and dividing by the area analyzed. Air concentration is calculated by omltiplying A) by the filter concenteation and then dividing by the volume of air collected in cubic centimeters (cc). ese calculations can be found on the Asbestos Count Sheat. The ait filter concentration relates only to air fiber content. When ssmples are submitted by an outside agency for analysis, Enviroscience. can only guarantee the accucacy of the filter endorsement of produ ‘The samples osflected in voniplete according to EPA 40 CFR 763. action 1s considered A result of zero stract concentration. This repost may not be reproduced without the express permission of Enviroscience. This report cen not be used to claim cts by NVLAP ot any agency of the U.S. Government. the response action area demonstrated a filter concentration of asbestos less than seventy structures pet square millimeter. This response ures per square snillimeter is only applicable to the area analyzed. Test results indy reflect conditions at the time samples were taken. 3/28/2081 18:14 ENYVTROSCIEN are .— NSLTAN PAGE NYC 9/11 Public Portal Document

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NYC-WTC_000094525Source: NYC Law Department, mirrored locally

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