Cover page for an air monitoring and bulk sampling report for Building #200 at 375 South End Avenue.
NYC-WTC_000095478–000095630Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
104 East 25th Street
YATC ASSOC IATES I N C. New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306
September 26, 2001
ALC Environmental lit W. 30th Street tt' 'Cork. v- 01 A,.'Ln: Mr .
Re. Report of TM Analysis
Dear Mr.
Following are the results of tranernl3sion electron microscopy (TEM) analysisof thirteen PCM air iamnles from our Group No. 5557:
Client. Mid -State Project Name. : and 3b5 Southend Avenue • Location: :;airways, Buildings 200 and 300 Samples received in TEM Lab: 09/26/01
These results will confirm and document the ± a transmitted to you today. The analyses were performed in strict conformance with the methodology of the NIOSH method 7402, Issue 2, August 15, 1994.
Forty grid openings from each of the samples were examined at relatively low magnifications (approximately 1 OCOX and 10,000X) for structures greater than Sum in length and widths between 0.25um 3 :1 . ^d 3um, and having a length-to-width ratio greater than structures would be large enough to be observed by PCM These analysis. Asbestos and non -asbestos structures were detected in the samples in the following proportions:
sample chrysotile gypsum cellulose F/CC as number Asbestos
14.3% 85.7% 0.0% 0.002 1 3 8.80 55.9% 35.3% 0.001 5 0.04 100.0% 0.0% 0.0 0.0% 61.1% 38.9% 0.0 6 8 0.0% 100.0% 0.0% 0.0 9 5.8% 94.2% 0.0% 0.001 0.0% 30.4% 69.6% 0.0 10 0.0% 83.34 16.7% 0.0 11 0.0% 37.5% 62.5% 0.0 12 11.80 60.8% 27.4% 0.002 13 0.0% 100.0°% 0.0% 0.0 14 0.0% 100.0% 0.0% 0.0 16 0.0% 75.0% 25.0% 0.0 18
NYC-WTC 000095492
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