Alternative Testing Methods for Contaminants Listed at 40 CFR 141.25(a)
Contaminant | Methodology | EPA method | SM 21st edition1 | SM 22nd edition,28 SM 23rd edition,49 SM 24th edition66 | ASTM4 | SM online3 |
Naturally Occurring: | ||||||
Gross alpha and beta | Evaporation | 900.0, Rev. 1.050 | 7110 B | 7110 B | ||
Liquid Scintillation | 7110 D | D 7283-17 | 7110 D-17. | |||
Gross alpha | Coprecipitation | 7110 C | 7110 C | |||
Radium 226 | Radon emanation | 903.1, Rev. 1.053 | 7500-Ra C | 7500-Ra C | D 3454-05, -18, D 3454-21 | |
Radiochemical | 903.0, Rev. 1.054 | 7500-Ra B | 7500-Ra B | D 2460-07 | ||
Gamma Spectrometry | 7500-Ra E | 7500-Ra E-07. | ||||
Radium 228 | Radiochemical | 904.0, Rev. 1.062 | 7500-Ra D | 7500-Ra D | ||
Gamma Spectrometry | 7500-Ra E | 7500-Ra E-07. | ||||
Uranium | Radiochemical | 7500-U B | 7500-U B | |||
ICP-MS | 3125 | D 5673-05, 10, 16 | ||||
Alpha spectrometry | 7500-U C | 7500-U C | D 3972-09 | |||
Laser Phosphorimetry | D 5174-07 | |||||
Alpha Liquid Scintillation Spectrometry | D 6239-09 | |||||
Man-Made: | ||||||
Radioactive Cesium | Radiochemical | 7500-Cs B | 7500-Cs B | |||
Gamma Ray Spectrometry | 7120 | 7120 | D 3649-06 | |||
Radioactive Iodine | Radiochemical | 7500-I B, 7500-I C, 7500-I D | 7500-I B, 7500-I C, 7500-I D | D 3649-06 | ||
Gamma Ray Spectrometry | 7120 | 7120 | D 4785-08, -20 | |||
Radioactive Strontium 89, 90 | Radiochemical | 7500-Sr B | 7500-Sr B | |||
Tritium | Liquid Scintillation | 7500-3H B | 7500-3H B | D 4107-08, -20 | ||
Gamma Emitters | Gamma Ray Spectrometry | 7120, 7500-Cs B, 7500-I B | 7120, 7500-Cs B, 7500-I B | D 3649-06, D 4785-08, -20 |
Table B-Detection Limits for Gross Alpha Particle Activity, Radium 226, Radium 228, and Uranium
Contaminant | Detection limit |
Gross alpha particle activity | 3 pCi/L. |
Radium 226 | 1 pCi/L. |
Radium 228 | 1 pCi/L. |
Uranium | 1 [MICRO]g/L |
Table C-Detection Limits for Man-made Beta Particle and Photon Emitters
Radionuclide | Detection limit |
Tritium | 1,000 pCi/1. |
Strontium-89 | 10 pCi/1. |
Strontium-90 | 2 pCi/1. |
Iodine-131 | 1 pCi/1. |
Cesium-134 | 10 pCi/1. |
Gross beta | 4 pCi/1. |
Other radionuclides | 1/10 of the applicable limit. |
40 C.F.R. §141.25