Air quality test reports cover letter, Jan 2002

NYC-WTC_000105132 ENVIROSCIENCE _ CONSUL 2.150 SMITHTOWN AVENUE NEw YorK 11779 PHONE (631) 580-3191 FACSIMLE: (631) 580-3195 WAWW_ENVIROHEALTH ORG RONKONKOMA, ELAP # 1168T NVLAP #20053 1-0 TEM AiR SAMPLE RESULTS TANTS, INC, [2N" PROJECT NAME: AREA: CLIENT #: Tech Clean AMEX 22 Thames, 10th Floor 0060-10233 SAMPLE DATE: September 20, 2001 SAMPLER: CUSFODY #: RECEIVED DATE: September 21, 2001 Final Cleaance Ambient L. Savarese B-04-09 Start Sample Location _ Avg. Rate] Volume | Filter Conc. Sensitivity Air Conc. Simm2 Sicc 015, 10th Figor 1:12 5:31 10 0.0 0.0019 <Sensitivity 6315883195 010, 10th Foar _ 1:00 5:25 10 005, 10th Floor 1:18 5:28 4.19 0.0 0.0018 0.0019 Center of 10th Floor 1:15 3:50 10 10th Floor Copy Area 1:10 BSS Analyzed by: Samples were Diffraction (SAED), and Concentration on the the effective filter area analyzed using Philips 400T Transmission Electron Microscope. Asbestos identification is detenmined by the morphology, visual Selected Arca Electron Elemental Analysis using an Energy Dispersive X-ray Analyzer (EDAX). filter is calculated by taking the number of ssbestos structures and dividing by the area analyzed. Air concentration is calculated by multiplying (EFA) by the filter concentration and then dividing by dhe volume of ait collected in cubic centimeters (cc). 40 0.0 0.0031 | sSensitivicy | <Sensitiviy| 0.0 0.0031 Sensitivity | f. "Date Analyzed: 7222 ‘The daia pertaining co these calculaticns can be found on the Asbestos Count Sheet. . The air {ater concentration relates only to ait fiber contest. When samples are submitted by an outside agewcy for analysis, Eaviroscience. can only guarantee the accuracy of the filter endorsement of products by The samples collected in action is considered A result of zero complete according to EPA 40-CFR 763. structures per square millimeter is caly applicable to the area analyzed. Test results anly reflect conditions at the time samples were teken, concentration. This repart may not be reproduced without the express permission of Envisoscience. This report can not be used to claim NVLAP or any agency of the U.S. Government. the response action area demonstrated a fitter concestration of asbestos less than seventy structures per square millimeter. This response S=Asbestoe structures,cc=cublc centimeters, mm=millimeter <= less than, Flow Rate ta lters per minute 29/28/2681 18:14 ENVIROSCIENCECNSLT AN PAGE 22 NYC 9/11 Public Portal Document