Entity_and_Attribute_Overview:
For USGS-defined attributes:
STAID = An 8- to 14-digit downstream order number for lake 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:
SB = bottom material
SNAME = The station name for lake sites is the location description or local identifier. Example of a station name is Lake Claremore at Dam at Claremore, OK.
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:
P39731 2,4-D, bed sediment, recoverable, dry weight, micrograms per kilogram
P39631 Atrazine, bed sediment, recoverable, dry weight, micrograms per kilogram
P81404 Chlorpyrifos, bed sediment, recoverable, dry weight, micrograms per kilogram
P49324 DCPA, bed sediment smaller than 2 millimeters, wet sieved (native water), field, recoverable, dry weight, micrograms per kilogram
P39571 Diazinon, bed sediment, recoverable, dry weight, micrograms per kilogram
P38931 Dicamba, bed sediment, recoverable, dry weight, micrograms per kilogram
P34354 Endosulfan sulfate, bed sediment, recoverable, dry weight, micrograms per kilogram
P49345 Lindane, bed sediment smaller than 2 millimeters, wet sieved (native water), field, recoverable, dry weight, micrograms per kilogram
P39343 Lindane, bed sediment, recoverable, dry weight, micrograms per kilogram
P39531 Malathion, bed sediment, recoverable, dry weight, micrograms per kilogram
P39046 Simazine, bed sediment, recoverable, dry weight, micrograms per kilogram