General information about sampling locations.
The Location Definition Information (LDI) file is the foundation for all the subsequent environmental data submitted to ERPIMS and ties together all hydrogeological and chemical data. A location is a uniquely defined geographical point where some environmental sample or measurement was taken for inclusion into ERPIMS. Incomplete location definition information will limit the usefulness of the data in Geographic Information Systems (GIS). The Location Identification (LOCID) for a given location must be consistent throughout a submission and between submissions. A sampling location that may have begun as a bore hole and was later completed as a monitoring well needs only one LDI record. The LDI information is mandatory. If a location has not been previously entered into ERPIMS, and it was not provided when submitting a current LDI file, the location's technical information cannot be accepted. (See Section 3, Definitions, for more information.)
Note: There can be only one sampling location with a given coordinate pair. Distinction of samples collected at different depths or contained in different matrices are reflected in the Samples table and must not be treated as if collected from different LOCIDs. If a location type is converted, say from a bore hole to a monitoring well, contact the ERPIMS Help Desk to have the location information updated. A list of all the current locations and the associated information is automatically downloaded in a project during the application synchronization process.
Changes to location coordinates, elevation and well measuring point elevation, and well maintenance resulting in changes to casings, screen changes, or depths should be coordinated with the Help Desk.
Whenever a new well or bore hole location is submitted, lithology (LTD) data should be submitted also. Well locations should have any applicable site (SLX) data provided. Newly established or reported well locations should have well completion data (WCI) and well interval data (WINT) submitted.
When normal environmental samples are taken from monitoring wells, GWD must be provided with the Group 2 data. Missing GWD data will result in the data submission being considered incomplete.
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