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Petrographic Report on Asbestos Content of Building Materials in Central Brooklyn High School, Wing #3
Report Prepared by: Dr. W. Powell, Brooklyn NY, January 2002
This report documents the content of 5 samples of building materials from Wing #3 of Central Brooklyn High School. Samples were collected by an independent contractor and submitted to W. Powell for PLM analysis. Only one sample, FLOOR TILE #1 contained identifiable asbestos, with 2% very fine-grained chrysotile.
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Sample: |
Ceiling Tile #1 |
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| Description: | Material is fibrous and friable. Tile is light gray in color with a white, painted bottom surface. | |
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Composition: |
Cellulose: |
35% |
| Fiberglass: | 30% | |
| Unidentified Non-Fibrous Material: | 35% | |
| Total Asbestos: | 0% | |
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Sample: |
Ceiling Tile #2 |
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| Description: | Material is coarsely fibrous and friable. Tile is orangey-brown in color with a white, painted bottom surface. | |
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Composition: |
Cellulose: |
85% |
| Unidentified Non-Fibrous Material: | 15% | |
| Total Asbestos: | 0% | |
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Sample: |
Floor Tile #1 |
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| Description: | Material is NOB. Tile is 12"x12" and is cream-colored with marblized brown pattern. | |
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Composition: |
Chrysotile: |
2% |
| Calcite | 35% | |
| Unidentified Non-Fibrous Material: | 63% | |
| Total Asbestos: | 2% | |
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Sample: |
Pipe Insulation #1 |
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| Description: | Material is friable and fibrous. Compact, pale brown material with fine fibers. | |
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Composition: |
Cellulose: |
35% |
| Fiberglass: | 10% | |
| Calcite: | 40% | |
| Other Non-Fibrous Material:
(Vermiculite) |
15% | |
| Total Asbestos: | 0% | |
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Sample: |
Wallboard #1 |
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| Description: | Material is friable and fibrous. Brown paper on both sides of white, chalky material 1/2" thick. | |
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Composition: |
Cellulose: |
5% |
| Fiberglass: | 1% | |
| Gypsum: | 94% | |
| Total Asbestos: | 0% | |