OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
2 /28/2081 11:00 718-861-3740 PES PAGE 03/08
SAMPLING METHODS AND ANALYSES:
Viable air samples were taken using the N6 Aerotech Impactor. One Tryptic Soy Agar plate was exposed in each area. Samples were taken for two minutes for a total air volume of 56.6 liters/minute per plate. A total of ten samples were taken indoors, with one additional plate exposed outdoors using the same technique, for a background comparison.
Bacteria samples were cultured in Tryptic Soy Agar (with 5% Sheep Blood) for 2 days at a temperature of 28 degrees Celsius. The analytical technique utilized was light microscopy.
Analysis of bioaerosol samples was performed at: Aerotech Laboratories, Inc. 2020 West Lone Cactus Drive Phoenix, AZ 85027
A portable Organic Vapor Meter (OVM) model 580B by Thermo Environmental Instruments, Inc., was used to test for Volatile Organic Compounds (VOCs) in the air. This instrument detects and quantifies most organic vapors with a highly sensitive photoionization detector (RID). It has an operating range of 0-2000 parts per million (ppm) with a minimum detectable limit of 0.1 ppm.
Calibration was done before and after sampling, with sources of "zero air" and "span gas" (250 ppm isobutylene).
SUMMARY OF FINDINGS
1. Volatile Organic Compounds
Location PPM
Outside ' 0.0
15th floor hallway 0.0
13`" floor hallway 0.0
11th floor hallway 0.0
Apt#; p11 0.0
Apt#; 0.0
9th floor hallway 0.0
NYC-WTC 000108696
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