Wipe samples for metals report, PS 89M, Dec 2001

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan January 3, 2002 Wipe Samples for Metals Page 2 F. S. 89 (Manhattan) ATC Proiect No. 15-19125-0297

There are no established regulatory values for these metals on indoor surfaces. The New York State Department of Environmental Conservation (NYSDEC) has clean-up objectives for metals in soil but not for interior surfaces (See. Attachment 2). There are no Occupational Safety and Health Administration (OSHA) standards that are applicable to this circumstance.

Wipe Sample Results

Metals were detected in all ten samples however only one sample, collected from a windowsill in Room 526 (Sample #M-03), contained measurable levels of the nine metals detected. No single sample contained the highest measured metal concentrations. Aluminum, chromium, copper, iron, magnesium and manganese were found in all samples. Molybdenum was not found in any sample above the reporting limit. Magnesium and zinc were also recovered from the blank. Metal concentrations are shown in the following table.

TABLE METAL CONCENTRATIONS (micrograms/sample)

METAL RANGE NUMBER OF SAMPLES

ALUMINUM 20.5 - 345 10

CADMIUM 0.272-0,503 2

CHROMIUM 0.224-7.72 10

COBALT 0.230- 1.04 4

COPPER 1.78-20.0 10

IRON 28.2-454 10

MAGNESIUM* 56.7-196 10

MANGANESE 0.931-10.4 10

MOLYBDENUM BRL** 0

NICKEL 0.689-2.94 7

ZINC* 23.9-425 10

* Metal also detected in blanlc ** Below reporting limit

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660264

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