OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan April 5. 2002 Wipe Samples for Dioxins Page 2 P. S. 234 /Manhattan) ATC Project No. 15-19125-0279
multiplying by an established equivalency factor. This provides a single value (in nanograms} for the analytical results for each sample. The sample locations and the results are shown in the table: DIOXIN WIPE SAMPLE RESULTS (2, 3, 7, 8 TCDD EQUIVALENTS) March 1, 2002 DIOXIN CONCENTRATION LOtATlbN/SAMPLE NUMBER (ng/m^)
1 st Floor Hallway - east end/DXl 0.00051
1st Floor Hallway - west end/DX2 0.0067
ITie concentrations on indoor surfaces were 0.00051 and 0.0067 ng/m^. These levels are well below the NYSDOH guideline.
It is not possible to determine when the 2, 3, 7, 8 - TCDD equivalents detected in these samples were deposited. Dioxin wipe samples were not collected from this school prior to December 6, 2001.
ft is our pleasure to provide these indoor environmental services to the NYC Board of Education. If you have any questions about this report, please call (212) 353-8280, extension 212.
Sincerely, A TC ASSOCIA TES INC.
James R. Cohn, CIH, CSP Regional Manager, Industrial Hygiene Division
Attachment
CITY_21MC100_002879185
NYC-WTC_000218509
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NYC-WTC_000177787
Letter transmitting analytical results for PCDDs and PCDFs from wipe samples collected at PS234M on March 1, 2002.
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Letter transmitting analytical results for PCDDs and PCDFs from wipe samples collected at PS234M on March 1, 2002.
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NYC-WTC_000177787
Letter transmitting analytical results for PCDDs and PCDFs from wipe samples collected at PS234M on March 1, 2002.
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