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

NYC-WTC_000095104 EINNVIROSCIENCE CONSULTANTS, INC. 2150 SMITHTOWN AVENUE RONKONKOMA, New YorRK 11779 PHONE: (G3 1) 580-3191 Facswaite: (631) 5803195 WWW.CNVIROHEALTH.GRG LAP # $1681 NVLAP #200531-0 TEM AIR SAMPLE RESULTS PROJECT NAME: AREA: CLIENT #: Terb Clean Amex 22 Thames, 9th Floor 00-10235 | Sample # Sample Location _ SAMPLE DATE: September 20, 200! RECEEVED DATE: September 21. 2001 Ambient B. Gallagher B-04-G4 SAMPLER: CUSTODY #: Start .. Run Time} Flow Rate) Vol minutes Volume | Filter Cone. | Sensitivity | Avg. | Liters S/mm2_ Slcc Sicc Air Conc. TEM Al | Cubical #52 16:58 145 9 1305 63.13 | TEM A2 [Reon 909 TEM A2 Cubical #4 | TEM Ad | Cassalegs) Room bares wae hadnt vy eee oe ee, eee 5 6.0029 0.02 |_.0.0037 6.018 9.5 1662.5. | 88.38 16:36 | 154 9.5 1463 202.0 0,0033 9.053 16:40 190 225 5 13775_| 101.07. | 9.0035 | 0.028 | 16:42 | 19 if 7.25 1384 37.88 9.0035 0.01! Samples were anal Diftraction (SAED), aud Concentration on the filter Analyzed by: VELA DCE Date Analyzed: 22-0 lyzed using Philips 4007 ‘Transmission Electron Miccoscope. Asbesins identification is determined by the morphology, visual Selected Area Blectron Etemental Analysis using an Energy Dispersive X-ray Analyzer (EDAX). is calculated by taking the sumber of asbestos struchues and dividing hy the area analyzed. Air concentration is calculated by multiplying S=Asbestos structures,ce-cubic centimetecs, mm=millimeter = tess than, Flow Rafe in liters per minute the effective filter area (EFA) by the filter concentration and then dividing by tse volame of air collected in cubic centimeters (cc). ‘The data pertaining to these calculations can be found on the Asbestos Count Sheet. The air filter accuracy of the fiker eadorsement of products concentration relates only to air fiber content. When samples are submitted by an vatside agency for analysis, Baviroscience. can only guarantee the . This report may not be reproduced without the express permission af Enviroscience. This report cen not be used to claim by NVLAP os any agency of the U.S. Government. ‘The samples collected in the response action arce demonstrated a filter convenitation of asbestos less than seventy structures per square millimeter. This response actioa is considered A resukt of zero stractares complete according te EPA 40 CFR 763. Dex squate millimeter is only applicable to the area analyzed. Tout results only reflect condivions xf the time sauptes were taken, 89/28/2021 18:14 6315883195 ENVIROSCIENCECNSLTAN PAGE “94 NYC 9/11 Public Portal Document