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

NYC-WTC_000095102 i (atti‘t~t~*s E. NVIROSCIENCE TEM AIR SAMPLE RESULTS CONSULTANTS, INC. 2150 SMimHrown AVENUE RONKONKOMA, New York 11779 PHONE: (631) 80-3191 FACSMILE: (631) 580-3195 WWW ENVIROHEALTH.ORG ELAP # 11661 CLIENT: (PROJECT NAME: AREA: CLIENT #: Tech Clean SAMPLE DATE: — September 20,2001. AMEX 22 Thames, 7th Floor 00-10233 RECEIVED DATE: September 21, 2001 SAMPLER: CUSTODY #: B-04 B. Gallagher -03 NVIAP #20053 1-0 ~ | Sample # TEM AI | Mande! office Start | End | Ron‘ Time! Flow Ratel Volume } Fikes Conc. minutes | Avg, { Liters | 17:12 | 20:35 | 203 7 TEM A2 | Kate Duffy office TEM A3 jRoom Sice 0.0034 | Sensitivity j ee eevee amaced Sensitivi coe nr 17:15 | 20:50| 215 | 725 An erent nartss momen d 17:25 | 20:54 | 209 8.5 0.0031 ante cA turtle 0,0027_. _TEM_A4 {Room 705 17:25 | 21:00| 215 | 95 | 2043 | 1263 | | TEM A5 | Gutside room 703 21:05 | 214 21.5 |__ 9.0024 0.0062 bo. etoneve Seppe Sre—panl 0.0024 0.003 0.015 foe eee oe ce dees ee ae ce or Ma Analyzedty: LMS cde nha» Date Analyzed Samples were analyzed using Philips 400T Transmission Electron Mictascope. Asbestos identificati F222 Of SexAsbestos structures.ce=cubic centimeters, mm-=millimeter « <= less than, Flow Rate in Bters per minute Diffraction (SAED), and Elemental Apalysis using an Energy Dispersive X-ray Analyzer (EDAX). Concentration on the filter is calculated by taking the number of asbestos strnctures and dividing (EFA) by the {iter concentration and then dividing by the volume of air collected in cubic centioecters (cc). the effective filter area The data pertaining tu these calculations can be found on the Asbestos Count Sheet. Wheu samples are submitted by an outside agency for analysis, Enviroscieace, can only guarantee the reproduced without the express permission of Envirosclence. This report can not be used to claim The aig filter concentration relates only to air fiber cantent. accucacy of the filter concentration. This report may not be exdorsement of products The sampies collected action is considered complete A result of zero structures by NVLAP or any agency of the U.S. Government. in the response action ates demoustrated a filter concentration of asbes according to HPA 40 CER 763. Det square miltioeter is only applicable to the area analyzed. Test results only reficct conditions af the time samples were wken. on is determined by the mozphology, visual Selected Area Electron by the atea analyzed, Air cosveatration is calculated by multiplying tos less than seveaty structures per square millimeter. ‘This response ¢ 83/78/2881 18:14 6315883195 ENVIROSCIENCECNSL TAN PAGE 19 NYC 9/11 Public Portal Document