Entity_and_Attribute_Overview:
For USGS-defined attributes:
STAID = An 8- to 14-digit downstream order number for surface-water sites is usually used for the STAID. When downstream order is used, the first 8 to 14 positions of the field must contain digits. The remaining positions are blank. A STAID that contains a latitude-longitude and sequence number can be assigned to sites where there is difficulty in assigning a meaningful downstream order number, or where data are obtained intermittently. In this case, positions 1-6 are coded with latitude, 7-13 are coded with longitude, and 14-15 are coded with a sequence number. A 15-digit STAID for a surface-water site most likely indicates a water-quality grab sample site, a surface-water site at which miscellaneous measurements were made, or a site with large open areas like a lake, reservoir, or bay.
SAMPL = Sample record number is the database record number individual to site, date, and time of sample collection.
MEDIM = Medium codes and the descriptions are:
BA = Animal tissue
SNAME = The station name for surface-water sites is the location description or local identifier. Example of a station name is North Canadian River near Harrah, Okla. The station name for ground-water sites includes the township and range followed by the section and a series of letters that designate the quarter-section subdivisions, from the largest to the smallest, followed by a site sequence number. The order of the quarter-section subdivisions differ from that used by the Bureau of Land Management and the public-land survey. The public-land survey uses a series of coordinate directions and a fraction to designate the quarter-section subdivisions listed from smallest to largest followed by the section, township, and range. For example, the same 10-acre plot would be described by using the public land survey as NW1/4 SW1/4 NE1/4 Sec.5 T2S R3E and described by using the USGS SNAME as 02S-03E-05 ACB. A direct comparison between the quarter-section subdivisions for the public-land survey and the USGS SNAME is that A=NE, B=NW, C=SW, and D=SE.
For the following parameter codes, a value may be preceded by a remark. Example: < 0.5. Remarks and the descriptions are:
< = Less than. (Actual value is known to be less than the value shown.)
Values listed for the following fields are reported to the nearest accuracy level of the measurement or analytical method:
P49378 DCPA, biota, whole organism, recoverable, wet weight, micrograms per kilogram
P49363 Lindane, biota, whole organism, recoverable, wet weight, micrograms per kilogram