Site reference data

A maximum trichloroethylene level of 9.9 ppb was found in sediment from Liverpool Bay, England (Pearson and McConnell 1975). Sediment levels from nondetectable to 0.2 ppb (wet weight) trichloroethylene were found in Lake Pontchartrain near New Orleans (Ferrario et al. 1985). An analysis of the EPA STORET Data Base (1980-1982) found that trichloroethylene had been positively detected in sediment samples taken at 6% of 338 observation stations, with median levels of <5 pg/kg (dry weight) (<5 ppb) (Staples et al. 1985). The observation stations included both "ambient" and "pipe" sites. Ambient sites include streams, lakes, and ponds and are intended to be indicative of general U.S. waterway conditions. Pipe sites refer to municipal or industrial influents or effluents. 

The compound registration process uses some reference data that do not change very often. Examples of these data are Research Projects, Assays, People, and Salts. These ancillary data are usually accessed by CRS using some lookup mechanism, such as by name, site, and id. 

Following the keyword RATES, reactions rates and mathematical equations are listed from different references to describe the kinetics of K-feldspar, albite, calcite, pyrite, organic carbon, and pyrolusite reactions. Again, these entries have to be seen as examples that often have to be replaced or adjusted by site-specific data. 

NIST also maintains a website called the NIST Chemistry WebBook (http //webbook. nist.gov), which provides access to a broad array of data compiled under the Standard Reference Data Program. This site allows a search for thermochemical data for more than 7000 organic and small inorganic compounds, reaction thermochemistry data for over 8000 reactions, IR spectra for over 16,000 compounds, mass spectra for over 15,000 compounds, UV/VIS spectra for over 1600 compounds, electronic and vibrational spectra for over 5000 compounds, spectroscopic constants of over 600 diatomic molecules, ion energetics data for over 16,000 compounds, and thermophysical properties data for 74 selected fluids. The site allows general searches by formula, name, CAS registry number, author, and stracture and also a few specialized searches by properties like molar mass and vibrational energies. 

Site Location Data type LGM Holocene Pre-industrial Holocene References... 

B.10 Reference data from reference sites, reference samples and literature... 

A crucial factor in a risk assessment is the quality of the reference data, because the results of the site-specific ecological measurements or calculations are... 

The RSL, surfaces have to be determined by spatial interpolation of data from shoreline displacement curves (rsl e RSL,) reconstructed from sedimentary records at sites r, e Rto grid points covering the area of investigation. The locations of the rsl curves are shown in Fig. 14.5, and for site references see Table 14.2. 

Physical reference data were taken from the web site maintained by the NIST, reachable at the URL http //physics.ni8t.gov/Phy8RefData/contents.html. 

Martin, W. C., Musgrove, A., Kotochigova, S., and Sansonetti, J. E., NIST Physical Reference Data Web Site, , October 2004. 

NIST Physical Reference Data web site, Units/index.htnil>, October 2004. 

This table presents values for the first ionization energies (IP) of approximately 1000 molecules and atoms. Substances are listed by molecular formula in the modified HiU order (see Preface). Values enclosed in parentheses are considered not to be well established. Data appearing in the 1988 reference were updated in 1996 for inclusion in the database of ionization energies available at the Internet site of the Standard Reference Data program of the National Institute of Standards and Technology (http //webbook. nist.gov). The list appearing here includes these updates. 

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