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 µg/L 111 44.6 24.3 26 30.3
Antimony µg/L 33.1 22.9 46.3 42 35.9
Arsenic µg/L 1 1 < 3 < 3 1
Barium µg/L 36.5 28.4 38.3 36 45.1
Beryllium µg/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Bismuth µg/L < 0.005 0.01 < 0.005 < 0.005 0.01
Cadmium µg/L 0.44 0.26 1.08 0.82 0.37
Cerium µg/L < 0.01 0.03 0.02 0.02 0.01
Cesium µg/L 0.08 0.05 0.04 0.04 0.06
Chromium µg/L 25.9 9 25.1 18.2 31.4
Cobalt µg/L 1.23 0.72 1.04 1.02 1.15
Copper µg/L 19.2 19.8 22.4 13.5 11.4
Gallium µg/L 0.23 0.1 0.1 0.1 0.1
Germanium µg/L 0.07 0.09 0.1 0.08 0.07
Iron µg/L < 50 < 50 < 50 < 50 < 50
Lanthanum µg/L < 0.01 0.01 < 0.01 0.01 < 0.01
Lead µg/L 0.64 0.5 0.5 0.51 0.97
Lithium µg/L 11.2 4.1 11.2 9.4 9.8
Manganese µg/L 1 3.2 2 3.8 2.3
Mercury ng/L nm nm 18 7 nm
Molybdenum µg/L 56.8 14 45.7 42.2 30.8
Nickel µg/L 18.1 14.4 21.4 19.4 25.2
Niobium µg/L < 0.02 0.03 0.1 0.1 0.02
Rubidium µg/L 12.6 8.08 12.4 12.9 14.1
Scandium µg/L 1.8 1.3 2.2 1.9 1.9
Selenium µg/L 2.5 1 < 5 < 5 1.9
Silver µg/L < 3 < 3 nm nm < 3
Strontium µg/L 834 561 1150 1100 1230
Thallium µg/L < 0.05 < 0.05 0.2 0.06 < 0.05
Thorium µg/L 0.04 0.09 0.8 0.37 0.06
Titanium µg/L 17.9 13.4 18.9 18.7 25.7
Uranium µg/L 0.03 0.15 0.08 0.09 0.06
Vanadium µg/L 6.2 6 11.8 8.8 9.7
Yttrium µg/L < 0.01 < 0.01 0.08 0.08 0.11
Zinc µg/L 10.7 7.7 15.6 20.9 11.6
Zirconium µg/L 0.07 0.1 0.5 0.3 0.08
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; µg/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 µg/L 53.9 6.33 50.6 53.6 153
Antimony µg/L 15.3 28.6 11.2 21.2 17
Arsenic µg/L < 1 2 < 3 1 < 1
Barium µg/L 28.9 23.2 17.5 33.9 32.2
Beryllium µg/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Bismuth µg/L 0.01 0.01 < 0.005 0.006 0.01
Cadmium µg/L 0.55 0.39 0.47 0.25 0.16
Cerium µg/L 0.01 0.02 0.02 0.01 0.02
Cesium µg/L 0.05 0.05 0.03 0.06 0.05
Chromium µg/L 42 20.8 17.4 19.3 27.7
Cobalt µg/L 1.02 1.29 1.04 1.16 0.98
Copper µg/L 10.2 15.6 14.4 6.2 9.6
Gallium µg/L 0.1 0.05 0.08 0.2 0.27
Germanium µg/L 0.06 0.1 0.05 0.05 0.04
Iron µg/L < 50 < 50 < 50 < 50 < 50
Lanthanum µg/L < 0.01 0.01 < 0.01 < 0.01 < 0.01
Lead µg/L 1.5 0.4 0.3 1.1 0.68
Lithium µg/L 6.4 11.2 6.9 7.4 7.8
Manganese µg/L 1.2 35.1 1.7 1.4 1
Mercury ng/L nm nm 8 nm nm
Molybdenum µg/L 10.6 46.3 35.5 10.7 7.42
Nickel µg/L 22.2 25 21.9 24.6 24.8
Niobium µg/L 0.02 0.02 0.07 0.04 0.04
Rubidium µg/L 12.4 14.1 8.91 14.1 10
Scandium µg/L 1.5 1.2 0.8 1.7 1.5
Selenium µg/L < 1 3 < 5 2.2 1.6
Silver µg/L < 3 < 3 nm < 3 < 3
Strontium µg/L 1060 999 1000 1020 943
Thallium µg/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Thorium µg/L 0.06 0.24 0.2 0.1 0.17
Titanium µg/L 24.8 25.1 19.4 25.9 24
Uranium µg/L 0.03 0.52 0.01 0.02 0.02
Vanadium µg/L 6.6 6.5 2.7 8 5.5
Yttrium µg/L 0.1 0.1 0.05 0.1 0.07
Zinc µg/L 10.6 24.1 12.7 9.6 6.5
Zirconium µg/L 0.2 0.2 0.09 0.2 0.2
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; µg/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 µg/L 23.8 33.4 45 22.6 27.8
Antimony µg/L 73.6 25.5 43.6 35.5 33.5
Arsenic µg/L 3.2 3 2 < 3 < 3
Barium µg/L 58.4 38.6 43.5 53.9 32.4
Beryllium µg/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Bismuth µg/L 0.01 0.01 0.007 < 0.005 < 0.005
Cadmium µg/L 1.56 0.38 0.54 1.06 1.04
Cerium µg/L 0.02 0.02 0.02 0.02 0.02
Cesium µg/L 0.08 0.05 0.1 0.04 0.03
Chromium µg/L 24.4 15.7 34.5 26.1 16.2
Cobalt µg/L 3.18 1.17 1.25 0.72 0.87
Copper µg/L 39 21.5 9 14 10.6
Gallium µg/L 0.1 0.2 0.2 0.1 0.1
Germanium µg/L 0.2 0.05 0.08 0.09 0.08
Iron µg/L < 50 < 50 < 50 < 50 < 50
Lanthanum µg/L 0.01 < 0.01 0.02 0.01 < 0.01
Lead µg/L 11.5 0.4 0.83 0.2 0.5
Lithium µg/L 29.7 24.3 11.2 9.6 7.9
Manganese µg/L 4.9 1 2 3.3 1.8
Mercury ng/L nm nm nm 12 10
Molybdenum µg/L 140 126 50.4 30.6 27.9
Nickel µg/L 32.1 27 25.9 18.1 20.7
Niobium µg/L 0.03 0.06 0.03 0.07 0.06
Rubidium µg/L 19.3 14.9 25 9.26 10.8
Scandium µg/L 2.2 2.1 2.5 1.6 1.4
Selenium µg/L 7.4 8.8 3.5 < 5 < 5
Silver µg/L < 3 < 3 < 3 nm nm
Strontium µg/L 1240 1440 1160 1540 1070
Thallium µg/L < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
Thorium µg/L 0.13 0.16 0.08 0.12 0.1
Titanium µg/L 25.5 25 26.3 16.5 18.9
Uranium µg/L 0.13 0.008 0.04 0.09 0.03
Vanadium µg/L 13.2 16.1 12.2 7.2 7
Yttrium µg/L 0.11 0.09 0.12 0.08 0.07
Zinc µg/L 11 8.4 12.1 5.3 12.2
Zirconium µg/L 0.2 0.2 0.2 0.2 0.1
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; µg/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 µg/L 611 702 10.8 121  
Antimony µg/L 20.8 17.1 8.72 7.97  
Arsenic µg/L 3.3 3.3 < 3 < 3  
Barium µg/L 61.7 57.2 22.8 10.4  
Beryllium µg/L < 0.05 < 0.05 < 0.05 < 0.05  
Bismuth µg/L 0.02 < 0.005 < 0.005 < 0.005  
Cadmium µg/L 0.18 0.18 0.02 0.02  
Cerium µg/L < 0.01 0.01 0.26 0.4  
Cesium µg/L 0.09 0.08 0.02 < 0.01  
Chromium µg/L 69.4 109 18 408  
Cobalt µg/L 1.84 2.21 1.27 0.75  
Copper µg/L 15.1 33.6 5.6 3.5  
Gallium µg/L 0.59 0.97 0.08 0.38  
Germanium µg/L 0.05 0.07 0.1 < 0.02  
Iron µg/L < 50 < 50 < 50 < 50  
Lanthanum µg/L 0.01 0.01 0.05 0.18  
Lead µg/L 5.8 10.9 0.4 0.3  
Lithium µg/L 18.5 19.5 1.3 0.3  
Manganese µg/L 1.3 1.7 5.5 2.1  
Mercury ng/L 130 125      
Molybdenum µg/L 73.8 72.9 1.74 1.18  
Nickel µg/L 36.2 42.6 24.9 16.6  
Niobium µg/L 0.08 0.05 0.08 < 0.02  
Rubidium µg/L 17.7 20.8 3.54 1.35  
Scandium µg/L 1.2 2.1 3.6 5.5  
Selenium µg/L 10.5 10.3 < 5 < 5  
Silver µg/L < 3 < 3 < 3 < 3  
Strontium µg/L 1420 1690 990 758  
Thallium µg/L 0.08 < 0.05 < 0.05 < 0.05  
Thorium µg/L 0.51 0.38 0.52 0.18  
Titanium µg/L 25.5 28.4 24.9 15.3  
Uranium µg/L 0.01 < 0.005 0.02 0.006  
Vanadium µg/L 6.5 7.8 13.8 14.4  
Yttrium µg/L 0.13 0.16 0.31 0.27  
Zinc µg/L 28.4 61.8 20.1 15.8  
Zirconium µg/L 0.4 0.4 3.7 0.2  
nm - not measured; ppm - parts per million; mg/L - milligrams per liter; µg/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 µg/L 6.33 702 49.68    
Antimony µg/L 7.97 73.6 24.37    
Arsenic µg/L 1 3.3 1.83    
Barium µg/L 10.4 61.7 33.90    
Beryllium µg/L < 0.05 < 0.05 ***    
Bismuth µg/L 0.006 0.02 0.01    
Cadmium µg/L 0.02 1.56 0.33    
Cerium µg/L 0.01 0.4 0.02    
Cesium µg/L 0.02 0.1 0.05    
Chromium µg/L 9 408 29.50    
Cobalt µg/L 0.72 3.18 1.17    
Copper µg/L 3.5 39 13.21    
Gallium µg/L 0.05 0.97 0.15    
Germanium µg/L 0.04 0.2 0.07    
Iron µg/L <50 <50 ***    
Lanthanum µg/L 0.01 0.18 0.02    
Lead µg/L 0.2 11.5 0.83    
Lithium µg/L 0.3 29.7 7.91    
Manganese µg/L 1 35.1 2.31    
Mercury ng/L 7 130 21.26    
Molybdenum µg/L 1.18 140 25.54    
Nickel µg/L 14.4 42.6 23.46    
Niobium µg/L 0.02 0.1 0.05    
Rubidium µg/L 1.35 25 11.02    
Scandium µg/L 0.8 5.5 1.82    
Selenium µg/L 1 10.5 3.58    
Silver µg/L < 3 < 3 ***    
Strontium µg/L 561 1690 1083.10    
Thallium µg/L 0.06 0.2 0.10    
Thorium µg/L 0.04 0.8 0.16    
Titanium µg/L 13.4 28.4 21.65    
Uranium µg/L 0.006 0.52 0.04    
Vanadium µg/L 2.7 16.1 8.24    
Yttrium µg/L 0.05 0.31 0.11    
Zinc µg/L 5.3 61.8 13.38    
Zirconium µg/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; µg/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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