NYC-WTC_000220050

NYC 9/11 Public Portal Document

HEAVY METALS NYSDEC TAGM Regulatory Levels December 2001

SOIL SAMPLE RESULTS Soil Soil Soil Soil Soil NYSDEC TAGM CRITERIA Sample 1 Sample 2 Samples Sample 4 Sample 5 COMPOUND (ppm) (ppm) (ppm) (ppm) (ppm) (ppm) Aluminum SB (33,000) 4,010 6,050 4,700 3,250 7,130 Arsenic 7.5 or SB (3 -12) 3 3.7 4.9 3.2 3.3 Barium 300 or SB (15 - 600) 53.3 101 41.8 37.2 67.2 Beryllium 0.16 or SB (0-1.75) 0.27 0.3 0.25 0.18 0.38 Cadmium 1 or SB (0.1-1) 2.4 1.1 ND ND ND Calcium SB (130 - 35,000 79,100 78,400 74,300 40,500 101,000 Chromium 10 or SB (1.5 - 40) 16 15.5 17.2 9.6 19-1 CobSt 30 or SB (2.5 - 60) 3.8 4.3 2.7 3.3 3.1 Copper 25 or SB (1 - 50) 648 317 952 53.3 8,600 Iron 2,000 or SB (2,000 - 550,000) 11,500 19,600 8,240 8,620 8,430 Lead SB (200 - 500) 111 111 91.6 43 113 Magnesium SB (100 - 5,000) 5,880 6,480 7,120 5,090 7,400 Manganese SB (50 - 5,000) 197 238 154 128 184 Mercury 0.10 0.11 0.12 0.071 0.07 0.048 Nickel 13 or SB (0.5 - 25) 9.3 9.4 9.3 15.7 12.3 Potassium SB (8,500 - 43,000) 620 586 759 497 1,180 Selenium 2 or SB (0.1 - 3.9) ND ND ND ND ND Sodium SB (6,000 - 8,000) 490 637 503 268 792 Vanadium 150 or SB (1 -300) 9.2 10.5 8.9 9.3 12.5 Zinc 20 or SB (9-50) 1,260 2,060 611 257 702

Bold # and shaded box - Soil sample results exceed NYSDEC TAGM regulatory levels. ND - Not Detected NYSDEC TAGM - New York State Department of Environmental Conservation Technical & Administrative Guidance Memorandum SB - Site Background. Numbers in brachets () indicate eastern USA soil background. ppm - part per million

* Soil samples were taken on December 19, 2001.

NYCDDC 1 12/1/1999

CITY_21MC100_002911376

NYC-WTC_000220050