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

NYC-WTC_000095099 CONSUL. ENVIROSCIENCE 50 Sarrayrown AVENUE RONKONKOMA, PHONE: (631) 5803191 AREA: FACSIMILE: (63 1) 5803195 WWW.ENVIROHEALTHLORG FLAP # 11681 NVLAP #2005310 | Sample | TEM AIR SAMPLE RESULTS ICLIENT: Tech Clean TANTS, INC. IPROJECT NAME: AMEX 22 Thames Armbient . New Yor 11779 4th Floor SAMPLER: B. Gallagher CLIENT @: 00-19233 CUSTODY #: B-05-04 SAMPLE DATE: September 24, 2001 ~ RECEIVED DATE: September 25, 2001 | minutes | Avg. Liters Sémm2 Sample Location Start | End [Run Time | Flow Ratel Volume | Filter Conc. | Sensitivity | 4 Sicc Air Canc. Sloe TEM Ai2 | Room 40) 15:4} 21:10 | 316 8.5 2686_{: 0.0 0.0618 <Sensitivity TEM A13/Room 4 16:00 1 23:05 8.5 2592 9.0 0.0019 <Sensitivity | ~en f ADEN 2 a | ‘TEM Al4|Room 414, hallway _ 16:06 | 21:07 | 10 3070 12.63 0.0016 — m & <Sensitivity | | TEM A15| Room 430 -— 5 wad mw 16:03 | 2t:d4 || Sensitivity | Kum ol FF oh oe TEM Al6| Room 425 8.5 2643 00 0.0018 Sensitivity. 16:10 | 21:07 297. 8.5 |- 2524 0.0 0.0019 Sensitivity | We arene te terabeee cect. sonane S=Asbestos structures.co-cobic centimeters, mm=millimeter Analyzed by Samples were analyzed Diffraction (SAED), and Concentration on the filter the effective filter area (EF. these calculations can be found on the Asbestos Count Sheet. The data The air filter concentration accuracy of the filter endorsement of products The samples collected action is considered A result of zero SALMO Siloti Date Analyzed: FLOO <= less than, Flow Rate in liters per minute using Philips 400T Transnussion Blectron Microscope. Asbestos identification is determined by the morphology, visual Selected Area Electrun Elemental Analysis using an Eaergy Dispersive X-ray Analyzer (EDAX). is calculated by taking the ngmber of asbestos stractures and dividing by the area analyzed. Air concentration is calculated by multiplying 1A) by the filter concentration aad then dividing by the volume of air collected in cubic centimeters (cc). ation relates only to air fiber content. When samples are submitted by an outside agency for analysis, Enviroscleace. can only guarantee the concentration. This repart may not be reproduced withont the express permission of Envicascience. This report cam not be used to claim by NVLAP or any agency of the U.S. Govemment. in the response action aves demonstrated a filter concentration of asbestos less than seventy structures pex square millimeter, This response complete accordiag to EPA 40 CFR 763. per square millimeter is only applicable to the area analyzed. Test results only reflect conditions at the time samples were taken. ENV TROSCIENCECNSLTAN 89/26/2861 19:14 6315803195 PAGE 16 , NYC 9/11 Public Portal Document