API Publ 4731-2003 pdf free download
API Publ 4731-2003 pdf free download.Light Non-Aqueous Phase Liquid (LNAPL) Parameters Database.
1.1 Database contents The LNAPL Parameters Database is a collection of information about samples that have had their capillary parameters determined, as well as other physical parameters measured. Capillary properties are critical in multiphase calculations, and those results have very high sensitivity to these properties. Capillary properties are sparsely documented in technical literature, and the documentation that exists is generally for other fields of study. Thus, they are not as applicable to environmental release conditions. There are significant property differences between the environmental samples in the subject database and those found in the historic literature. The purpose of this manual is not to discuss these differences, but rather document the construction and content of the API LNAPL parameters database. The data (samples) contained in this database come from a number of different sources and sites (refineries, fuel storage facilities, military bases, etc.); information now in the public domain. The data that have been included in this database were not collected for the purpose of populating a database of useful parameters. The samples were collected to answer site- specific questions and to aid in the mitigation and remediation of site-specific problems. Given this diverse sample background, it is not surprising that the range of tests performed on each sample and the testing procedures used during the tests differ in many cases. Nevertheless, this is currently the most complete set of laboratory measurements of samples whose properties have been analyzed for the purpose of understanding LNAPL remediation in near-surface aquifers.
Helpful Hint: To return to the Query by Permeability Range screen, close the report screen (click the close screen box in the upper right-hand corner). The remaining query options provide access to a subset of the entire database holdings that match the basic parameter query. There are three subsections: Capillary Parameters (this section is not present in the Query by Capillary Parameters basic parameter query area), (petrophysical) Rock Properties, and Grain Size Parameters. Each subsection has three options. To minimize the redundancy, only the individual options from the Capillary Parameters section will be shown here. The screens from the other options mimic the capillary parameter output in format but not content. The content of the other items was shown in the All Parameters example above.
The user is provided with a drag-down menu of Unified Soil Classification System (USCS) symbols, and their definitions in terms of the fraction of fines (silt + clay), sands, and gravels, within a sample. Once the user selects a soil type, all of the queries described in section 1.2 are available to the user. The drag-down menu does not include all possible USCS symbols. There are two reasons for this: 1) The database does include samples of all soil types, and only the soil types present within the database are shown, and 2) the laboratory that performed the grain size analysis on the bulk of samples in the database does not separate clay fractions by organic content. All clays are assumed to be inorganic within the database. 1.4 Retrieve samples within a range of fine (silt + clay) percentages The database can be queried to return only samples that fall within a user specified range of fine particles. Fines are defined to include the sum of the silt and clay fractions. Many samples, particularly those whose grain size distributions were determined by screening, do not distinguish between fine silt and clay. Setting a low limit on the fine fraction boundary is equivalent to requiring primarily sand size (or greater) particles. Figure 8 shows the data input window for this type of query.
