U.S. Geological Survey


Leach Table 1. Table summarizing analytical results for solutions leached from WTC dust and beam coating samples. Details of the leach test methods are summarized in the text.

Leach Table 1
  Outdoor dust samples
  WTC-01-2 WTC-01-3 WTC-01-05 WTC-01-06 WTC-01-14
pH 10.1 9.51 9.9 9.65 9.68
Specific Conductance mS/cm 1.58 1.31 1.9 2.01 2.03
Chloride mg/L 7.8 3.7 nm nm 5.1
Fluoride mg/L <.8 <.8 nm nm <1.6
Nitrate mg/L 1.5 0.5 nm nm 1.4
Calcium mg/L 388 314 577 523 544
Magnesium mg/L 1.75 2.83 3.2 3.65 3.52
Potassium mg/L 6 3.8 7.71 6.33 6.9
Silicon mg/L 5.8 4.5 8.1 5.9 6.4
Phosphorous mg/L 0.05 0.1 0.04 0.03 0.05
Sodium mg/L 6.1 2.84 7.69 5.76 3.05
Sulfate mg/L 834 694 1210 1040 1250
Aluminum g/L 111 44.6 24.3 26 30.3
Antimony g/L 33.1 22.9 46.3 42 35.9
Arsenic g/L 1 1 < 3 < 3 1
Barium g/L 36.5 28.4 38.3 36 45.1
Beryllium g/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Bismuth g/L < 0.005 0.01 < 0.005 < 0.005 0.01
Cadmium g/L 0.44 0.26 1.08 0.82 0.37
Cerium g/L < 0.01 0.03 0.02 0.02 0.01
Cesium g/L 0.08 0.05 0.04 0.04 0.06
Chromium g/L 25.9 9 25.1 18.2 31.4
Cobalt g/L 1.23 0.72 1.04 1.02 1.15
Copper g/L 19.2 19.8 22.4 13.5 11.4
Gallium g/L 0.23 0.1 0.1 0.1 0.1
Germanium g/L 0.07 0.09 0.1 0.08 0.07
Iron g/L < 50 < 50 < 50 < 50 < 50
Lanthanum g/L < 0.01 0.01 < 0.01 0.01 < 0.01
Lead g/L 0.64 0.5 0.5 0.51 0.97
Lithium g/L 11.2 4.1 11.2 9.4 9.8
Manganese g/L 1 3.2 2 3.8 2.3
Mercury ng/L nm nm 18 7 nm
Molybdenum g/L 56.8 14 45.7 42.2 30.8
Nickel g/L 18.1 14.4 21.4 19.4 25.2
Niobium g/L < 0.02 0.03 0.1 0.1 0.02
Rubidium g/L 12.6 8.08 12.4 12.9 14.1
Scandium g/L 1.8 1.3 2.2 1.9 1.9
Selenium g/L 2.5 1 < 5 < 5 1.9
Silver g/L < 3 < 3 nm nm < 3
Strontium g/L 834 561 1150 1100 1230
Thallium g/L < 0.05 < 0.05 0.2 0.06 < 0.05
Thorium g/L 0.04 0.09 0.8 0.37 0.06
Titanium g/L 17.9 13.4 18.9 18.7 25.7
Uranium g/L 0.03 0.15 0.08 0.09 0.06
Vanadium g/L 6.2 6 11.8 8.8 9.7
Yttrium g/L < 0.01 < 0.01 0.08 0.08 0.11
Zinc g/L 10.7 7.7 15.6 20.9 11.6
Zirconium g/L 0.07 0.1 0.5 0.3 0.08
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; g/L - micrograms per liter; ng/L - nanograms per liter; mS/cm - milliSiemens per centimeter
 
Leach Table 1, continued
  Outdoor dust samples, continued
  WTC-01-15 WTC-01-16 WTC-01-17 WTC-01-21 WTC-01-22
pH 10 8.22 9.47 9.98 10.4
Specific Conductance mS/cm 2.01 2.08 1.96 2.02 2.02
Chloride mg/L 3.4 8.5 nm 7.8 8.1
Fluoride mg/L <1.6 <1.6 nm <1.6 <1.6
Nitrate mg/L 1.5 <1.6 nm 2.4 1.5
Calcium mg/L 528 526 517 549 529
Magnesium mg/L 1.71 20.2 2.54 2.61 2.12
Potassium mg/L 5.9 9.2 4.83 7.7 5.2
Silicon mg/L 4.9 4.3 2 5.8 5.4
Phosphorous mg/L 0.02 0.03 < 0.01 0.04 0.05
Sodium mg/L 2.65 5.09 4.81 4.11 5.69
Sulfate mg/L 1230 1350 1110 1270 1170
Aluminum g/L 53.9 6.33 50.6 53.6 153
Antimony g/L 15.3 28.6 11.2 21.2 17
Arsenic g/L < 1 2 < 3 1 < 1
Barium g/L 28.9 23.2 17.5 33.9 32.2
Beryllium g/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Bismuth g/L 0.01 0.01 < 0.005 0.006 0.01
Cadmium g/L 0.55 0.39 0.47 0.25 0.16
Cerium g/L 0.01 0.02 0.02 0.01 0.02
Cesium g/L 0.05 0.05 0.03 0.06 0.05
Chromium g/L 42 20.8 17.4 19.3 27.7
Cobalt g/L 1.02 1.29 1.04 1.16 0.98
Copper g/L 10.2 15.6 14.4 6.2 9.6
Gallium g/L 0.1 0.05 0.08 0.2 0.27
Germanium g/L 0.06 0.1 0.05 0.05 0.04
Iron g/L < 50 < 50 < 50 < 50 < 50
Lanthanum g/L < 0.01 0.01 < 0.01 < 0.01 < 0.01
Lead g/L 1.5 0.4 0.3 1.1 0.68
Lithium g/L 6.4 11.2 6.9 7.4 7.8
Manganese g/L 1.2 35.1 1.7 1.4 1
Mercury ng/L nm nm 8 nm nm
Molybdenum g/L 10.6 46.3 35.5 10.7 7.42
Nickel g/L 22.2 25 21.9 24.6 24.8
Niobium g/L 0.02 0.02 0.07 0.04 0.04
Rubidium g/L 12.4 14.1 8.91 14.1 10
Scandium g/L 1.5 1.2 0.8 1.7 1.5
Selenium g/L < 1 3 < 5 2.2 1.6
Silver g/L < 3 < 3 nm < 3 < 3
Strontium g/L 1060 999 1000 1020 943
Thallium g/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Thorium g/L 0.06 0.24 0.2 0.1 0.17
Titanium g/L 24.8 25.1 19.4 25.9 24
Uranium g/L 0.03 0.52 0.01 0.02 0.02
Vanadium g/L 6.6 6.5 2.7 8 5.5
Yttrium g/L 0.1 0.1 0.05 0.1 0.07
Zinc g/L 10.6 24.1 12.7 9.6 6.5
Zirconium g/L 0.2 0.2 0.09 0.2 0.2
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; g/L - micrograms per liter; ng/L - nanograms per liter; mS/cm - milliSiemens per centimeter
 
Leach Table 1, continued
  Outdoor dust samples, continued
  WTC-01-25 WTC-01-27 WTC-01-28 WTC-01-30 WTC-01-34
pH 9.37 10 9.93 9.63 9.8
Specific Conductance mS/cm 2.16 2.31 2.02 1.9 2.02
Chloride mg/L 37 52 12 nm nm
Fluoride mg/L <1.6 <1.6 <1.6 nm nm
Nitrate mg/L 11 3 3.2 nm nm
Calcium mg/L 558 568 553 461 524
Magnesium mg/L 6.15 2.01 2.85 5.27 3.2
Potassium mg/L 11.7 9.7 11.3 3.22 5.06
Silicon mg/L 8.1 7.2 8.6 5 4.2
Phosphorous mg/L 0.06 0.04 0.04 0.02 0.02
Sodium mg/L 12.9 12.7 5.57 4.28 2.76
Sulfate mg/L 1240 1240 1250 986 1180
Aluminum g/L 23.8 33.4 45 22.6 27.8
Antimony g/L 73.6 25.5 43.6 35.5 33.5
Arsenic g/L 3.2 3 2 < 3 < 3
Barium g/L 58.4 38.6 43.5 53.9 32.4
Beryllium g/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Bismuth g/L 0.01 0.01 0.007 < 0.005 < 0.005
Cadmium g/L 1.56 0.38 0.54 1.06 1.04
Cerium g/L 0.02 0.02 0.02 0.02 0.02
Cesium g/L 0.08 0.05 0.1 0.04 0.03
Chromium g/L 24.4 15.7 34.5 26.1 16.2
Cobalt g/L 3.18 1.17 1.25 0.72 0.87
Copper g/L 39 21.5 9 14 10.6
Gallium g/L 0.1 0.2 0.2 0.1 0.1
Germanium g/L 0.2 0.05 0.08 0.09 0.08
Iron g/L < 50 < 50 < 50 < 50 < 50
Lanthanum g/L 0.01 < 0.01 0.02 0.01 < 0.01
Lead g/L 11.5 0.4 0.83 0.2 0.5
Lithium g/L 29.7 24.3 11.2 9.6 7.9
Manganese g/L 4.9 1 2 3.3 1.8
Mercury ng/L nm nm nm 12 10
Molybdenum g/L 140 126 50.4 30.6 27.9
Nickel g/L 32.1 27 25.9 18.1 20.7
Niobium g/L 0.03 0.06 0.03 0.07 0.06
Rubidium g/L 19.3 14.9 25 9.26 10.8
Scandium g/L 2.2 2.1 2.5 1.6 1.4
Selenium g/L 7.4 8.8 3.5 < 5 < 5
Silver g/L < 3 < 3 < 3 nm nm
Strontium g/L 1240 1440 1160 1540 1070
Thallium g/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Thorium g/L 0.13 0.16 0.08 0.12 0.1
Titanium g/L 25.5 25 26.3 16.5 18.9
Uranium g/L 0.13 0.008 0.04 0.09 0.03
Vanadium g/L 13.2 16.1 12.2 7.2 7
Yttrium g/L 0.11 0.09 0.12 0.08 0.07
Zinc g/L 11 8.4 12.1 5.3 12.2
Zirconium g/L 0.2 0.2 0.2 0.2 0.1
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; g/L - micrograms per liter; ng/L - nanograms per liter; mS/cm - milliSiemens per centimeter
 
Leach Table 1, continued
  Indoor dust samples Girder coatings  
  WTC-01-20 WTC-01-36 WTC-01-8 WTC-01-9  
pH 11.8 11.8 INS 10.8  
Specific Conductance mS/cm 3.41 3.4 INS 1.43  
Chloride mg/L 45 40 16 3  
Fluoride mg/L <1.6 <1.6 <.8 <.8  
Nitrate mg/L 9.1 17 62 4.1  
Calcium mg/L 718 888 528 336  
Magnesium mg/L 0.11 0.08 10.3 1.1  
Potassium mg/L 10.9 12.3 3 1  
Silicon mg/L 3.4 3.2 6.7 11.3  
Phosphorous mg/L 0.09 0.09 < 0.01 < 0.01  
Sodium mg/L 15.3 18.3 2.1 1.54  
Sulfate mg/L 1320 1640 1090 674  
Aluminum g/L 611 702 10.8 121  
Antimony g/L 20.8 17.1 8.72 7.97  
Arsenic g/L 3.3 3.3 < 3 < 3  
Barium g/L 61.7 57.2 22.8 10.4  
Beryllium g/L < 0.05 < 0.05 < 0.05 < 0.05  
Bismuth g/L 0.02 < 0.005 < 0.005 < 0.005  
Cadmium g/L 0.18 0.18 0.02 0.02  
Cerium g/L < 0.01 0.01 0.26 0.4  
Cesium g/L 0.09 0.08 0.02 < 0.01  
Chromium g/L 69.4 109 18 408  
Cobalt g/L 1.84 2.21 1.27 0.75  
Copper g/L 15.1 33.6 5.6 3.5  
Gallium g/L 0.59 0.97 0.08 0.38  
Germanium g/L 0.05 0.07 0.1 < 0.02  
Iron g/L < 50 < 50 < 50 < 50  
Lanthanum g/L 0.01 0.01 0.05 0.18  
Lead g/L 5.8 10.9 0.4 0.3  
Lithium g/L 18.5 19.5 1.3 0.3  
Manganese g/L 1.3 1.7 5.5 2.1  
Mercury ng/L 130 125      
Molybdenum g/L 73.8 72.9 1.74 1.18  
Nickel g/L 36.2 42.6 24.9 16.6  
Niobium g/L 0.08 0.05 0.08 < 0.02  
Rubidium g/L 17.7 20.8 3.54 1.35  
Scandium g/L 1.2 2.1 3.6 5.5  
Selenium g/L 10.5 10.3 < 5 < 5  
Silver g/L < 3 < 3 < 3 < 3  
Strontium g/L 1420 1690 990 758  
Thallium g/L 0.08 < 0.05 < 0.05 < 0.05  
Thorium g/L 0.51 0.38 0.52 0.18  
Titanium g/L 25.5 28.4 24.9 15.3  
Uranium g/L 0.01 < 0.005 0.02 0.006  
Vanadium g/L 6.5 7.8 13.8 14.4  
Yttrium g/L 0.13 0.16 0.31 0.27  
Zinc g/L 28.4 61.8 20.1 15.8  
Zirconium g/L 0.4 0.4 3.7 0.2  
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; g/L - micrograms per liter; ng/L - nanograms per liter; mS/cm - milliSiemens per centimeter
 
Leach Table 1, continued
  minimum maximum mean*    
pH 8.22 11.8 10.00    
Specific Conductance mS/cm 1.31 3.41 2.03    
Chloride mg/L 3 52 11.27    
Fluoride mg/L <1.6 <1.6 ***    
Nitrate mg/L 0.5 62 3.69    
Calcium mg/L 314 888 519.83    
Magnesium mg/L 0.08 20.2 2.27    
Potassium mg/L 1 12.3 6.03    
Silicon mg/L 2 11.3 5.43    
Phosphorous mg/L 0.02 0.1 0.04    
Sodium mg/L 1.54 18.3 5.16    
Sulfate mg/L 674 1640 1121.72    
Aluminum g/L 6.33 702 49.68    
Antimony g/L 7.97 73.6 24.37    
Arsenic g/L 1 3.3 1.83    
Barium g/L 10.4 61.7 33.90    
Beryllium g/L < 0.05 < 0.05 ***    
Bismuth g/L 0.006 0.02 0.01    
Cadmium g/L 0.02 1.56 0.33    
Cerium g/L 0.01 0.4 0.02    
Cesium g/L 0.02 0.1 0.05    
Chromium g/L 9 408 29.50    
Cobalt g/L 0.72 3.18 1.17    
Copper g/L 3.5 39 13.21    
Gallium g/L 0.05 0.97 0.15    
Germanium g/L 0.04 0.2 0.07    
Iron g/L <50 <50 ***    
Lanthanum g/L 0.01 0.18 0.02    
Lead g/L 0.2 11.5 0.83    
Lithium g/L 0.3 29.7 7.91    
Manganese g/L 1 35.1 2.31    
Mercury ng/L 7 130 21.26    
Molybdenum g/L 1.18 140 25.54    
Nickel g/L 14.4 42.6 23.46    
Niobium g/L 0.02 0.1 0.05    
Rubidium g/L 1.35 25 11.02    
Scandium g/L 0.8 5.5 1.82    
Selenium g/L 1 10.5 3.58    
Silver g/L < 3 < 3 ***    
Strontium g/L 561 1690 1083.10    
Thallium g/L 0.06 0.2 0.10    
Thorium g/L 0.04 0.8 0.16    
Titanium g/L 13.4 28.4 21.65    
Uranium g/L 0.006 0.52 0.04    
Vanadium g/L 2.7 16.1 8.24    
Yttrium g/L 0.05 0.31 0.11    
Zinc g/L 5.3 61.8 13.38    
Zirconium g/L 0.07 3.7 0.22    
*Geometric mean for all parameters except pH; ***Geometric mean not calculated due to one or more samples having concentrations below detection limit; nm - not measured; ppm - parts per million; mg/L - milligrams per liter; g/L - micrograms per liter;
ng/L - nanograms per liter; mS/cm - milliSiemens per centimeter

ins - insufficient leachate solution volume to measure pH and conductivity


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