NYC-WTC_000206720

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o O co g o Table 1 Results of the Analysis for Metals in Air I “0 o WTC New York ER c o CT o o' ro o "0 Client ID 05072 05073 05074 o ro Location P-ALBANY ST. & S-RECTOR PLACE & 9L o E-LIBERTY ST. & SOUTHEND AVE. SOUTHEND AVE. SOUTHEND AVE. O o Air Volume (L) 986 986 982 o c Date Collected 10/11/01 10/11/01 10/11/01 3 o 3 Analysis Cone MDL Cone MDL Cone MDL Parameter Method pg/m’ pg/m ’ pg/m^ pg/m^ ug/m^ (jg/m--

Aluminum ICAP 1.3 1.3 U 1.3 U 1.3 Antimony AA-Fur U 0.05 U 0.05 U 0.05 Arsenic AA-Fur U 0.05 U 0.05 U 0.05 Barium ICAP U 0.13 U 0.13 U 0.13 Beryllium ICAP U 0.05 U 0.05 U 0.05 Cadmium ICAP U 0.13 U 0.13 U 0.13 Calcium ICAP 7.9 2.5 U 2.5 6.2 2.5 Chromium ICAP U 0.13 0.16 0.13 0.21 0.13 Cobalt ICAP U 0.25 U 0.25 U 0.25 Copper ICAP U 0.25 U 0.25 U 0.25 Iron ICAP 2.3 0.63 1.4 0.63 1.9 0.64 Lead AA-Fur 0.053 0.05 U 0.05 U 0.05 Magnesium ICAP U 13 U 13 U 13 Manganese ICAP U 0.13 U 0.13 U 0.13 Nickel ICAP U 0.25 U 0.25 U 0.25 Potassium ICAP U 51 U 51 U 51 Selenium AA-Fur U 0.05 U 0.05 U 0.05 Silver ICAP U 0.13 U 0.13 U 0.13 Sodium ICAP U 13 U 13 U 13 Thallium AA-Fur U 0.05 U 0.05 U 0.05 o Vanadium ICAP U 0.25 U 0.25 U 0.25 A Zinc ICAP 0.28 0.25 U 0.25 0.30 0.25 I ro

R MDL denotes Method Detection Limit U denotes less than the MDL (not detected) o I Average Media Blank concentration (>=MDL) subtracted from all sample results o o

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