Technical Users Background Document

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Technical Users Background Document for the Water Pollutant Loading Tool (PDF) (143 pp, 2.4 MB)


Addendum to Section 3.3.1

3.3.1.10 Radioactive Pollutant Categories in Water Pollution Search

The DMR Loading Tool calculates annual pollutant loadings for specific radioactive isotopes or radionuclides, as listed in Table 3-20. Radionuclides can be measured in units of mass or radioactivity (in curies (Ci)). For all measurements, the Loading Tool first converts to standard units, either Ci or grams. For measurements of radioactivity, the specific activity of the radionuclide is used to convert from curies to mass.

Source: Turner, James E. (1992). Atoms, Radiation, and Radiation Protection. Mc-Graw Hill.

Table 3-20. Radionuclide Parameter Pollutant Category
Parameter NameParameter CodePollutant NameInformation for Radioactivity to Mass ConversionsGrouping Hierarchies
Half Life (Years)aAtomic MassaSpecific Activity (SA) (Ci/g)Mass Conversion Factor (Ci/kg)bConcentration Conversion Factor (Ci/mg)cGroup PriorityCategory Priority
Cesium-137 (CS-137), Total28401Cesium-13730.08136.90787.80611.1E-0511.388711
Cesium 13751607Cesium-13730.08136.90787.80611.1E-0511.388721
Potassium-40 (K-40), Total75038Potassium-401.2E+0939.9647.3E-06137.9291.4E+08 1
Radium 223, total20501Radium-2230.03129223.019518111.9E-080.0193 1
Radium 224, total24501Radium-2240.01002224.021610806.2E-090.00621 1
Radium 226, total09501Radium-2261601226.0250.999260.0011000.7411
Radium 226, dissolved09503Radium-2261601226.0250.999260.0011000.7421
Radium 228, total11501Radium-2285.75228.031275.7823.6E-063.62605 1
Strontium 90, total13501Strontium-9028.7989.9077139.6987.2E-067.1583111
Strontium 90, dissolved13503Strontium-9028.7989.9077139.6987.2E-067.1583121
Technetium 99, total (14)22100Technetium-990.0006998.906353325841.9E-100.00019 1
Thorium 23026501Thorium-23075380232.0380.020670.0483748371.2 1
Thorium 23222501Thorium-2321.4E+10232.0381.1E-079015.869E+09 1
Tritium, total07000Hydrogen-312.323.016059731.491E-070.1027611
Tritium, total82126Hydrogen-312.323.016059731.491E-070.1027621
Uranium, natural, total (in pCi/L)28012Uranium-2384.5E+09238.0513.4E-072941.42.9E+09 1

aSource: International Atomic Energy Agency (IAEA) International Nuclear Structure and Decay Data Network. Evaluated Nuclear Structure Data File (ENSDF) DatabaseExit
bRadioactivity (Ci/d)/[SA (Ci/g)*(1000 g/kg)] = Mass (kg/d)
cRadioactivity (Ci/L)*(1000 mg/g)/(SA (Ci/g)) = Concentration (mg/L)

Parameters included in the Radionuclides Category. All parameters measuring radioactivity of a specific radionuclide are included in this category.

Parameter Grouping/Category Priorities. All parameters with the same pollutant name are grouped together as shown in the "Group Priority" column of Table 3-20. The radionuclide category does not have a category-level aggregation hierarchy and includes all radionuclides with equal priority. Therefore the category priorities for all radionuclide parameter codes are assigned a '1' in Table 3-20.

Pollutant Load Aggregation. For category aggregation, all pollutant loads are summed together to calculate the total load.

Table 3-21 below provides the pollutant group and category priority for all parameters in the General Radioactivity category.

Table 3-21. General Radioactivity Parameter Pollutant Category
Parameter NameParameter CodePollutant NameGroup PriorityCategory Priority
Radium 226 + radium 228, total11503Radium 226 & 228, dissolved11
Radium 226 & 228, dissolved11500Radium 226 & 228, dissolved21
Radiation, gross alpha82077Alpha, total11
Alpha gross radioactivity80029Alpha, total21
Alpha, gross particle activity80045Alpha, total31
Radiation-gross alpha tot suspended80040Alpha, total41
Radiation-gross alpha tot dissolved80030Alpha, total51
Gross beta85817Beta, total 1
Radioactivity, gross82066Radioactivity 1
Dissolved radioactive gases82370Dissolved radioactive gases 1

Parameters included in the General Radioactivity Category. All parameters measuring gross radioactivity or radioactivity of more than one radionuclide are included in this category. Pollutant loadings are not calculated for these parameters.

Parameter Grouping/Category Priorities. All parameters with the same pollutant name are grouped together as shown in the "Group Priority" column of Table 3-21. The general radioactivity category does not have a category-level aggregation hierarchy and includes all radioactive pollutants with equal priority. Therefore the category priorities for all general radioactivity parameters are assigned a '1' in Table 3-21.

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3.3.1.11 Color Pollutant Category in Water Pollution Search

The DMR Loading Tool provides data for measurements of color in wastewater. Color measurements may be reported using a variety of units, such as Platinum Cobalt (Pt-Co) units or pound/ton produced. The Loading Tool presents the measurements in the units reported on DMRs, and does not convert the measurements into standard units.

Parameters Included in the Color Category. All parameters measuring color are included in this category. A complete list of the color parameters is provided in Table 3-22 below.

Table 3-22. Parameters included in the Color Pollutant Category
Parameter NameParameter Code
Color (PT-CO units)00080
Color, apparent (unfiltered sample)00081
Color, spectrophoto, water smpl at 7.6 pH00082
Color, spectrophoto-metric filter00083
Color00084
Color (admi units)01290
Color51201
Apparent Color (Admi Units)51486
Color, concentration at wavelength80114

Parameter Grouping/Category Priorities. There is no grouping or prioritization in the color pollutant category.

Pollutant Load Aggregation. There is no load aggregation in the color pollutant category.


3.3.1.12 Whole Effluent Toxicity (WET) Pollutant Category in Water Pollutant Search

The DMR Loading Tool provides data for wastewater parameters measuring WET. WET refers to the aggregate toxic effect to aquatic organisms from all pollutants contained in a facility’s wastewater. WET tests measure a wastewater's effects on specific test organisms' ability to survive, grow and reproduce. WET measurements may be reported using a variety of units, such as percentages or pass/fail. The Loading Tool presents the measurements in the units reported on DMRs, and does not convert the measurements into standard units.

See Whole Effluent Toxicity Methods for more information about Clean Water Act WET test methods.

Parameters Included in the WET Category. All parameters measuring WET are included in this category. A complete list of the WET parameters is provided in DMR Pollutant Loading Tool WET Parameters (CSV) (47 K).

Parameter Grouping/Category Priorities. There is no grouping or prioritization in the WET pollutant category.

Pollutant Load Aggregation. There is no aggregation in the WET pollutant category.

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