NYC-WTC_000231403

NYC 9/11 Public Portal Document !fc"TII'Tni »

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2.0 Executive Summary ALC Environmental Incorporated (ALC) has been retained to perform bulk sampling, visual assessments & air monitoring according to the EPA Protocol to determine the presence of asbestos at the above referenced project. Every apartment in the building was assessed by our inspectors for dust and debris. Any area where visible dust and debris was found, ALC’s inspectors took a sample, which was then sent to a third party independent laboratory for analysis. In most cases there was insufficient debris to sample and a visual assessment only was performed. If any areas were found to be positive after analysis, they were sent to another laboratory for fiirther analysis and quality control. All confirmatory samples analyzed were found to be below the nemussible limits for asbestos.

However, certified asbestos abatement contractors hired independently by tlie owner, were used to clean the specific apartment found to be in question. Upon satisfactory cleaning and following a visual inspection by ALC samples were collected and analyzed via Transmission Electron Microscopy (TEM) sampling, Afiair samnles were found to be below the nermissible limits.

ALC then collected TEM samples on every floor in the building. The air sampling and analysis was done utilizing applicable Federal, State and City Regulations pertaining to asbestos to include Federal OSHA (29 CER 1926.58) EPA NESHAPS (40 CFR PART 61), AND TSCA hilE IIAHERA/ASHARA (40 CFR PART 763) Asbestos Regulations; the New York State Department of Labor Industrial Code Rule 56 and the New York City Department of Environmental Protection Title 15 Asbestos Regulations,

/ The air samples were collected by Alvin B. Blake, a licensed sampling technician (AH#01-03528) under the supervision of Americo Rodriguez Jr,, a licensed project monitor (AH# 89-07160). The visual assessment and bulk samples were collected by, A.R, Blake a NY State Asbestos Inspector (AH#00-08397) and Americo Rodriguez, a NY State Asbestos Inspector (AH#89-07160). I ATC Associates (ELAP #10879) analyzed the samples using the Transmission Electron Microscopy (TEM) Methodology. The results indicated that the living areas achieved the acceotance criteria below <70 structures per nun2 set bv the above resalations.

I f 3.0 Definitions Air Sampling: Process of measuring the fiber content of a known volume of air collected during a specific period. The procedure utilized for asbestos follows the NIOSH Standard Analytical Method 7400, or the provisional transmission electron microscopy methods developed by the US EPA which are utilized for lower detection levels and specific fiber identification.

Asbestos: Any hydrated mineral silicate separable into cominercially usable fibers, including but not limited to chrysotile (serpentine), amosite (cumingtonite-gninerite), crocidolite (riebeckite), tremolite, anthophyllite and actinolite.

Oy Asbestos-Containing Material (ACM): Asbestos or any material containing more than one-percent asbestos.

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