Air quality test reports cover letter, Jan 2002

NYC-WTC_000105096 ENVIROSCIENCE CONSULTANTS, INC. 2150 SMITHTOWN AVENUE RONKONKOMA, New YorK 11779 PHONE: (G3 1) SB0-3191 Facsimiue: (63 1) 580-3195 WWIW.ENVIRQHEALTH ORG ELAP# 11681 NVLAP #200531-0 TEM AIR SAMPLE RESULTS PROJECT NAME: AREA: CLIENT #: ‘Terb Clean Amex 22 Thames, 9th Floor 00- 10233 | Sample # Sample Location _ SAMPLE DATE: RECEIVED DATE: SAMPLER: CUSTODY #: September 20, 2001 September 21. 2001 Ambient B. Gallagher B-04-04 Start_| minutes ... Run Time; Flow Rate) Volume | Filter Conc.| Sensitivity Avg. Liters S/mm2 Sioc Peers tahoe — ee TEM Al | Cubical #52 16:58 19-23 145 9 1305 63.13 | _0,0037 ssalege} Room TEM A2 {Cubical M49 — 16:35 19:30 ate] 16:56 19:35 154 95 | 16625. 88.38 9.5 1463 202.0 16:40 19:50 199 7.25 | 1377.5. TEM AS | Cubical #39 16:42 19:53 91 1.25 | 1384 101.01 | 9.0035 | 0.028 37.88 0.011 ba he ee ee ee we eh ew ee eee oe pane Oey Samples were analyz Diffraction (SAED), aud Elemental Analysis using an Energy Dispersive X-ray Analyzer (EDAX). Concentration on the filter is calculated by taking the aumber of asbestos structures and dividing hy the area analyzed. Air concentration is calculated by multiplying the effective filter area (HFA) by the filter concentration and then dividing by the volume of air collected in cubic centimeters (ce). ‘The data pertaining to these calculations can be foand on the Asbestos Count Sheet. The air filter concent S=Asdesios structuresce-cubic centimeters, mm=millimeter <= less than, Flow Rate in liters per minute ed using Philips 400T Tcansmission Electron Miccoscope. Ashestns identification is determined by the morphology, visual Selected Area Electron bation relates only to air fiber content. When samples are submitted by an catside agency for analysis, Emviroscience. can ouly guarantee the accuracy of the filter concentration. This report nay not be reproduced without the express permission of Enviroscience. This report can not be used to claim eadorsement of products by NVLAP or any agency of the U.S. Government. The samples collected in the cesponse action area demonstrated a filter conventration of asbestos less than seventy structures per square millimeter. This tespomse action is considered complet A result of zero stracture: je according ta EPA 40 CFR 763. $ Dex square millimeter is only applicable to the area analyzed. Tox results only reflect condiiions sf the time samples were taken. < 89/26/22@1 16:14 6315683195 PAGE 23 ENVZROSCIENCECNSLTAN NYC 9/11 Public Portal Document