Air quality test reports cover letter, Jan 2002

NYC-WTC_000105126 ENV IROSCIENCE CONSULTANTS, INC. TTHTOWN AVENUE RONKONKOMA, ONE: (631) 580-3191 70 FacsMiLe: (6631) 5803195 AREA: WWW.ENVIRQHEALTH.ORG AP# 11681 NVLAP #20053 1-0 TEM AIR SAMPLE RESULTS CLIENT: Tech Clean PROJECT NAME; AMEX 22 Thames , New Yorx 11779 4th Floor CUJENT #: 00- 10233 SAMPLE DATE: RECEIVED DATE: SAMPLER: CUSTODY #: September 24, 2001 September 25, 2001 Ambient B. Gallagher ______ Sample Location Start | End {| Run Time [Flow Rate) Volume Air Conc. minutes Avg. Liters Sfoc 1$:541 21:10 | 316 8.5 2686 <Sensitivitcy 16:00 1 21:05 305 8.5 m 414, hallway 16:00 | 21:07 | 3407 19 2992.1 00 3070_| 12.63 <Sensitivity <Sentitivity 16:03 | 21:4) 311 8.5 <Sensitivity | £6.05 | 21:05 | 308 8 fire escape __ —_ a 56:30 | 20:07 | 297. 8.5 <Sensitivity 2524 <Sensitivity ee es ee oer - Analyzed by The data The air filter cancentrati accuracy of the filter co endorsement of products by The samples collected in action is considered A result of zero structures TAS i Date Analyzed: “20°07 and Elemental Analysis using an Eacrgy Dispersive X-ray Analyzer (EDAX). is calculated by taking the ngmber of esbestas structures and dividing by the area analyzed. Air concentration is calculated by multiplying A) by the filter concentration and thon dividing by the volume of air collected in cubic centimeters (cc). tL S=Asbestos structures,co=cubic ‘centimeters, Tom=millimeter <= less than, Flow Rate in liters pec minute Samples were analyzed using Philips 400T Transndssion Electron Microscope. Ashestos xlentification is determined by the morphology, visual Selected Ares Electron Diffraction (SAED) Concentration on the filter the effective fiter area (EF. these caiculations can be foued on the Asbestos Count Sheet. aticn relates only to air fiber content. When samples are submitted by am outside agency for analysis, Enviroscieace. can only guarantee the ncentration. ‘This report may not be reproduced without the express permission of Envicosclence, This report cam not be used to claim NVLAP or any agency of the U.S. Govemment. the response action area demonstrated a filter concentration of asbestos kes than seventy structures per square millimeter. This response complete accordiag to EPA 40 CFR 763. per square millimeter is only applicable to the ares analyzed. Test resulis only reflect conditious at the time samples were taken. 69/26/2861 18:14 6315803195 ENVIROSCIENCECNSL TAN PAGE 16 NYC 9/11 Public Portal Document