Environmental Report 2007

Mathews, S; Gallegos, G M; Berg, L L; Bertoldo, N A; Campbell, Craig; Cerruti, S; Doman, J L; Ferry, Laurence; Grayson, A R; Jones, Heather; Kumamoto, G; Larson, J M; MacQueen, D H; Paterson, L; Revelli, M A; Ridley, Michael A.; Rueppel, D.W.; Wegrecki, A M; Wilson, K R; Woollett, J

doi:10.2172/945779

Cited by 2 publications

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“…LLNL has investigated the presence of radionuclides in local soils frequently over the years including possible impacts of the distribution to the public of sludge contaminated by the 1967 plutonium release (see Table 6-5 in the Environmental Report 2006 [Mathews et al 2007] for a list of previous studies). The studies have consistently shown that the concentrations of radionuclides in local soils are below levels of health concern.…”

Section: Livermore Sitementioning

confidence: 99%

Lawrence Livermore National Laboratory Environmental Report 2021

Rosene

Earhart

Aquino

et al. 2022

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Amount of energy imparted to matter by ionizing radiation per unit mass of irradiated material, in which the absorbed dose is expressed in units of rad or gray (1 rad = 0.01 gray).Accuracy. Closeness of the result of a measurement to the true value of the quantity measured.Action level. Defined by regulatory agencies, the level of pollutants which, if exceeded, requires regulatory action.Alluvium. Sediment deposited by flowing water.Alpha particle. Positively charged particle emitted from the nucleus of an atom, having mass and charge equal to those of a helium nucleus (two protons and two neutrons).Ambient air. Surrounding atmosphere, usually the outside air, as it exists around people, plants, and structures; for monitoring purposes, it does not include air immediately adjacent to emission sources.Analyte. Specific component measured in a chemical analysis.Aquifer. Saturated layer of rock or soil below the ground surface that can supply usable quantities of groundwater to wells and springs, and be a source of water for domestic, agricultural, and industrial uses. Bay Area Air Quality Management District (BAAQMD).Local agency responsible for regulating stationary air emission sources (including the LLNL Livermore site) in the San Francisco Bay Area.Becquerel (Bq). SI unit of activity of a radionuclide, equal to the activity of a radionuclide having one spontaneous nuclear transition per second.Beta particle. Negatively charged particle emitted from the nucleus of an atom, having charge, mass, and other properties of an electron.Categorical discharge. Discharge from a process regulated by EPA rules for specific industrial categories. Central Valley Regional Water Quality Control Board (CVRWQCB).Local agency responsible for regulating ground and surface water quality in the Central Valley. Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA).Administered by EPA, this federal law, also known as Superfund, requires private parties to notify the EPA of conditions that threaten to release hazardous substances or after the release of hazardous substances, and undertake shortterm removal and long-term remediation. Cosmic radiation.Radiation with very high energies originating outside the earth's atmosphere; it is one source contributing to natural background radiation. Curie (Ci).Unit of measurement of radioactivity, defined as the amount of radioactive material in which the decay rate is 3.7 × 10 10 disintegrations per second or 2.22 × 10 12 disintegrations per minute; one Ci is approximately equal to the decay rate of 1 gram of pure radium.Depleted uranium. Uranium having a lower proportion of the isotope uranium-238 than is found in naturally occurring uranium. The masses of the three uranium isotopes with atomic weights 238, 235, and 234 occur in depleted uranium in the weight-percentages 99.8, 0.2, and 5 × 10 -4 , respectively. Depleted uranium is sometimes referred to as D-38 or DU. Derived concentration guide (DCG).Concentrations of radionuclides in water and air that could be con...

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Section: Livermore Sitementioning

confidence: 99%