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_000094503

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

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NYC-WTC_000094503 ENVIR CONSU 50 SMITHTOWN AVENUE KOMA, New YORK 1 1779 ONE: (631) 5803191 ELAP # 11681 OSCIENCE TEM AIR SAMPLE RESULTS LTANTS, ING, [LE PROJECT NAME: Le (631) 580-3195 ENVIROHEALTH.ORG LAP #20053 10 Je seeten ine ens eee eee ee Tech Clean AMEX 22 Thames Sth Floor 00-10233 SAMPLE DATE: SAMPLER: CUSTODY #: September 24, 2001 September 25, 2001 Ambient B. Gallagher B-05-05 Sample Location _ Start | End Flow Rate) Volume .| Sensitivity Avg. |. tor lobby 21:23 room 507 __ arinenees ‘TEM A3L . / room 520 wens nee 1:24 | 60:40 wre LE oe eal 24:25 8.5 1658 0.0 0.0029 Skkc <Sensitivity <Sensitivity _. Bed 1666 8.5 1666 0.0.__|_ 0.0029 0.0 | 90,0029 <Sensitivity mn 514 8.5 1666 0.0 0.0029 <Sensitivity | - (TEM A22/F M A33 | ‘Ouiside le room S11 ‘ srrebeame en olan fp 21:28 | 21:30 i ‘ one oa aan 191 Lemar eesti meg) soe 8 1312 0. | 0.0037 <Sensitivity Rh I3a7 0.0 {1 0.0036 _<Sensitivity Analyzed by Saunples were analyzed Diffraction Concentration the effective fi The data vestain The air fliter conc accuracy of the ier endorsement of prof The sampies action is considered co A result af zero strict LM Sale Date te Analyzed PRE O/ and Elemental Analysis using an Energy Dispersive X-ray Analyzer (EDAX). © filter is calculated by taking tbe number of asbestos structures and dividing by the area analyzed. Air concentration is calculated by multiplying area (EFA} by the fitter concentration and then dividing by the volume of aic collected in cubic centimeters (cc). lo these calculations can he found oa the Asbestos Count Sheet. tration relates only to air fiber content. When samples are submitted by an outside agency for analysis, Enviroscience. can oaly guarantee the NVLAP or any agency of the U.S. Government. S=Asbestos structures,cc=cubic centimeters, mm=millimeier <= less than, Flow Rate im liters per minute using Philips 400T Transmission Electron Microscope. Asbestos identification is determined by the morphology, visual Selected ‘Area Electron oacentiation, This report may not be reproduced without the express permission of Envirosclence. This report can not be used to claim in the response action area demonstrated a filter concentration of asbestos less than seventy structutes per square millimeter. This response mplete according to EPA 40 CFR 763. res per square millimeter is only applicable to the area analyzed. Test results only reflect conditions at the time samples were taken. Q9/26/2@@1 18:14 6315893195 ENVIROSCIENCECNSL TAN PAGE 17 NYC 9/11 Public Portal Document

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NYC-WTC_000094503Source: NYC Law Department, mirrored locally

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