NYC 9/11 Public Portal Document
Mr. Vincent McGowan
BPCPC
January 14, 2001
Page 6 of 6
/ V 1
Results of ail four surface wipe samples for Mercury weffe'ND or “None Detected”.
Below is a table summarizing our findings by each contaminant (metal):
Table 2: Results of Metals in Wipe Samples and Guideline Standards
Contaminant (Metal): Range of Analytical Results of (4) Regulatory Limit
Wipe Samples (ug/sq.ft.): (ng/sq.ft.):
.^senic ND-36.0 N/A
Cadmium ND N/A
Chromium 6.89-35.5 N/A
Lead' 19,8-4'2.3 (Avg. 26.925) I
Mercury* ND N/A J
I
1 - The limit for Lead is set by the New York City Department of Health (NYCDOH) and the USEPA at 40
micrograms per square foot (ug/sq.ft.) on floor surfaces as a clearance criterion for lead-based paint
. abatement activities. The clearance criteria is compared to the average of all surface wipe samples collected
from each separate surface type.
Four separate surface wipe samples were collected for Merciay. Samples were collected side-by-side at the
same locations of the other surface wipe samples.
ND = None Detected N/?\ = Not Available
80‘d
SS::60 2002-92-abW
NYC-WTC_000150473
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