Chain of Custody Form Instructions for WTC Building Sampling

NYC 9/11 Public Portal Document

Table 9 Siimmarv of Airbome Fibers at Locations Where Asbestos Was Detected in Settled Surface Dust

Ontdoor Areas in Lower Manhattan Building Area Asbestos in Dust SVFinDusl{PLM)‘ Aggressive Fibers in Air (PLMorTEM)’ Sampling's (PCM/

1 Outdoor <1% 22% No 0.001 f'cc

2“ Outdoor 1.3% 28% No 0.003 f'cc

5 Outdoor 3.4% 25% No 0.002 fee

7 Outdoor 1.7% 35% No <0.001 fee

15 Outdoor 1.9% 72% No <0.001 fee

27 OutAxtr <1% 15% No <0.001 fee

Common Areas in Lower Manhattan Building Area Asbestos in Dust SVF in Dust (PLM)" Aggressive Fibers in Air (PLMorTEM)" Sampling‘s (PCM/

4 Common <1% 15% No 0.001 fee

6 Common <1% 10% No <0.001 fee

10 Common 1.5% 20% No 0.002 fee

24 Common <1% 5% No 0.001 fee

27 Common <1% 10% No <0.001 fee

Residential Units in Lower Manhi ittan___________ Building Area Asbestos in Dust SVF in Dust (PLM)’’ Aggressive Fibers in Air (PLMorTEM/ Sampling's (PCM/

4 Residenee 1 <1% 2% Yes <0.001 fee

4 Residenee 2 <1% 5% Yes 0.001 fee

5 Residenee 1 <1% 10% Yes 0.002 fee

5 Residenee 2 <1% 20% Yes <0.001 fee

9 Residenee 1 <1% 2% Yes 0.001 fee

9 Residenee 2 <1% 5% Yes 0.003 fee

11 Residenee 1 <1% ND Yes <0.001 fee

11 Residenee 2 1.5% ND Yes <0.001 fee

15 Residenee 1 <1% ND Yes <0.001 fee

27 Residenee 1 <1% 10% No <0.001 fee

a. Value shown is highest of the reported polarized light microscopy (PLM) and transmission electron microscopy (TEM) results for this area. b. SVF = synthetic vitreous fibers. Measured by PLM analysis. c. Aggressive sampling refers to a technique used in some residential units where the vacuum exhaust (used for settled dust sample collection) was used to stir up the settled surface dust before the air sampling began. d. fee = the fibers in each cubic centimeter (cc) of air. This is calculated from the number of fibers seen on the air filter and the volume of air pulled through the filter measured in cubic centimeters. e. Building 2 also had a co-located dust sample; values represent the highest measured result.

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