Cover letter enclosing air quality reports, Trinity Place, Jan 2002

NYC-WTC_000095105 ENVIROSCIENCE = CONSULTANTS, INC, (C2 Fech Clean 2.150 SetrOWwN AVENUE RONKONKOMA, PHONE (631) 5G0-3191 : . FACSIMLE: (631) 580-3195 AREA: 22 Thames, 10th Floor SAMPLER: L. Savarese WWW.ENVIROHEALTH.ORG NVLAP #20053 1-6 TEM AIR SAMPLE RESULTS — “SAMPLE DATE: September 20, 2001 PROJECT NAME: AMEX RECEIVED DATE: September 21, 2003 New Yor« #1779 Final Clearance Ambient CLIENT #: 00-10233 CUSTODY #: B-04-09 ELAP# 11681 | Sample ¢ Sample Location Start | End _| Run Time | Flow Rate|_ Volume | Filter Conc.| Sensitivity | Air Conc. _| TEM FI {1015, 10th TEM F2 31010, 1 Oth Floor. _. _ we 1:00 | $:25 | _265 10 2650} 0.0.1 0.0018 | Sensitivity TEM F3_} 1005, 10th Floor Lis | $:28 | 23 10 | 2530 0.0 0.0019 | <Sensitivicy, TEM F4 | Center of 10th Floor 1:15 | 3:50] 155 10 | 1550 0.0 6.0031 _| <Sensitivity | | TEM FS _|1Gth Floar Copy Area . a ef £10 | 3:55 ISS _ 1 10 1550 0.0 0.0031 __ | <Sensitivicy | 6315893195 minutes | Avg. Liters Simm2_ Sic | Slec | Floor 1:12 | 5:31 259 19 2590 6.0 0.0019 _| <Sensitivity Analyzed by: Samples were a, — 7 Oo S=Asbestos structures,co-cuble centimeters, mum=millimeter AM kcACT Date Analyzed: FL3 Ol <x loss tran, Flow Rate in ters per minute analyzed using Philips 4001 ‘Transmission Electron Microscope. Asbestos identification is determined by the morphology, visual Selected Area Electron Diffraction (SAED), and Elemeotal Analysis using an Energy Dispessive X-ray Anclyzex (EDAX). Concentration on the filter is calculated by taking the umber of ssbestos structures and dividing by the area analyzed. Air concentration is caleniated by multiplying the effective filter area (EFA) by the filter concentration and then dividing by the volume of air collected in cubic centinarters (cr). The data pertaining to these calculations can be found on the Asbestas Count Sheet. . The air filter concentration relates only ( air fiber contest. When samples are cubmitted by an outside agency for analysis, Envirosctence. can only guarantee the accuracy af the filter endarsement of products by concentration. This report may not be reproduced without the express permission of Eaviroscience, This report car not be ased to claim NVLAP or any agency of the U.S. Government. The samples collected in the respouse action area demonstraied a filter concentration of asbestos less than seventy structures per square millimeter. This response actian is considered A result of zero structores corapiete according to EPA 40-CFR 763. ber equare millimeter is only applicable to the area analyzed. Test results anly reflect conditions at the time sanmles were taken. @9/28/2081 1@:14 ENVIROSCIENCECNSL TAN PAGE 22 NYC 9/11 Public Portal Document