Entity_and_Attribute_Overview:
For USGS-defined attributes:
STAID = The STAID for groundwater sites is a 15-digit identification number assigned to the site, and contains no blanks or alphabetic characters. Although the station identification number is formed initially from the latitude and longitude of a point believed to represent the location of the site followed by a 2-digit sequence number, the STAID is an identifier and not a locator. The first six digits of the STAID are the value of latitude, the 7th through 13th digits are the value of longitude, and the 14th and 15th digits are sequence numbers used to distinguish between sites at the same location.
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:
6 = Groundwater (Water below the surface of the earth contained in the saturated zone. The code does not include soil moisture or interstitial water.)
SNAME = The station name for groundwater 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.)
> = Greater than. (Actual value is known to be greater than the value shown.)
E = Estimated value. (Value is estimated.)
A = Average value. (Value is an average.)
M = Presence verified, not quantified
V = Contamination. (Constituent was detected in both the environmental sample and the associated blanks.)
S = Most probable value.
Values listed for the following fields are reported to the nearest accuracy level of the measurement or analytical method:
P50470 2,4-D methyl ester, water, filtered, recoverable, micrograms per liter
P39732 2,4-D, water, filtered, recoverable, micrograms per liter
P39730 2,4-D, water, unfiltered, recoverable, micrograms per liter
P90593 2,4-DB, surrogate, Schedule 1304, water, unfiltered, percent recovery
P38746 2,4-DB, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P30219 2,4-DB, water, unfiltered, recoverable, micrograms per liter
P04040 2-Chloro-4-isopropylamino-6-amino-s-triazine, water, filtered, recoverable, micrograms per liter
P75981 2-Chloro-4-isopropylamino-6-amino-s-triazine, water, unfiltered, recoverable, micrograms per liter
P61029 Acetochlor ethanesulfonic acid, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P61030 Acetochlor oxanilic acid, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P49260 Acetochlor, water, filtered, recoverable, micrograms per liter
P50009 Alachlor ethanesulfonic acid, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P61031 Alachlor oxanilic acid, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P46342 Alachlor, water, filtered, recoverable, micrograms per liter
P77825 Alachlor, water, unfiltered, recoverable, micrograms per liter
P49313 Aldicarb sulfone, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82587 Aldicarb sulfone, water, unfiltered, recoverable, micrograms per liter
P49314 Aldicarb sulfoxide, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82586 Aldicarb sulfoxide, water, unfiltered, recoverable, micrograms per liter
P49312 Aldicarb, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82619 Aldicarb, water, unfiltered, recoverable, micrograms per liter
P39632 Atrazine, water, filtered, recoverable, micrograms per liter
P39630 Atrazine, water, unfiltered, recoverable, micrograms per liter
P61635 Azinphos-methyl oxygen analog, water, filtered, recoverable, micrograms per liter
P82686 Azinphos-methyl, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P39580 Azinphos-methyl, water, unfiltered, recoverable, micrograms per liter
P38711 Bentazon, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P04029 Bromacil, water, filtered, recoverable, micrograms per liter
P30234 Bromacil, water, unfiltered, recoverable, micrograms per liter
P49310 Carbaryl, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82680 Carbaryl, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P39750 Carbaryl, water, unfiltered, recoverable, micrograms per liter
P49309 Carbofuran, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82674 Carbofuran, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82615 Carbofuran, water, unfiltered, recoverable, micrograms per liter
P49306 Chlorothalonil, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P61636 Chlorpyrifos oxygen analog, water, filtered, recoverable, micrograms per liter
P38933 Chlorpyrifos, water, filtered, recoverable, micrograms per liter
P38932 Chlorpyrifos, water, unfiltered, recoverable, micrograms per liter
P81403 Chlorpyrifos, water, unfiltered, recoverable, micrograms per liter
P49305 Clopyralid, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P61595 lambda-Cyhalothrin, water, filtered, recoverable, micrograms per liter
P49304 Dacthal monoacid, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82682 DCPA, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P39770 DCPA, water, unfiltered, recoverable, micrograms per liter
P39572 Diazinon, water, filtered, recoverable, micrograms per liter
P39570 Diazinon, water, unfiltered, recoverable, micrograms per liter
P99223 Diazinon-d10, surrogate, Schedule 2002/9002, water, unfiltered, percent recovery
P91063 Diazinon-d10, surrogate, water, filtered (0.7 micron glass fiber filter), percent recovery
P38442 Dicamba, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82052 Dicamba, water, unfiltered, recoverable, micrograms per liter
P61588 Dimethenamid, water, filtered, recoverable, micrograms per liter
P49300 Diuron, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P61642 Endosulfan ether, water, filtered, recoverable, micrograms per liter
P34352 Endosulfan sulfate, water, filtered, recoverable, micrograms per liter
P61590 Endosulfan sulfate, water, filtered, recoverable, micrograms per liter
P34351 Endosulfan sulfate, water, unfiltered, recoverable, micrograms per liter
P49298 Esfenvalerate, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82672 Ethoprop, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P04025 Hexazinone, water, filtered, recoverable, micrograms per liter
P30264 Hexazinone, water, unfiltered, recoverable, micrograms per liter
P61695 Imidacloprid, water, filtered, recoverable, micrograms per liter
P39341 Lindane, water, filtered, recoverable, micrograms per liter
P39340 Lindane, water, unfiltered, recoverable, micrograms per liter
P39782 Lindane, water, unfiltered, recoverable, micrograms per liter
P39532 Malathion, water, filtered, recoverable, micrograms per liter
P39530 Malathion, water, unfiltered, recoverable, micrograms per liter
P50359 Metalaxyl, water, filtered, recoverable, micrograms per liter
P61596 Metalaxyl, water, filtered, recoverable, micrograms per liter
P04254 Metalaxyl, water, unfiltered, recoverable, micrograms per liter
P61043 Metolachlor ethanesulfonic acid, water, filtered (0.7 micron glass fiber filter), micrograms per liter
P61044 Metolachlor oxanilic acid, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P39415 Metolachlor, water, filtered, recoverable, micrograms per liter
P82612 Metolachlor, water, unfiltered, recoverable, micrograms per liter
P82630 Metribuzin, water, filtered, recoverable, micrograms per liter
P82611 Metribuzin, water, unfiltered, recoverable, micrograms per liter
P61697 Metsulfuron, water, filtered, recoverable, micrograms per liter
P82684 Napropamide, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P49293 Norflurazon, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82683 Pendimethalin, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P61668 Phosmet oxygen analog, water, filtered, recoverable, micrograms per liter
P61601 Phosmet, water, filtered, recoverable, micrograms per liter
P49291 Picloram, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P39720 Picloram, water, unfiltered, recoverable, micrograms per liter
P04037 Prometon, water, filtered, recoverable, micrograms per liter
P39056 Prometon, water, unfiltered, recoverable, micrograms per liter
P04036 Prometryn, water, filtered, recoverable, micrograms per liter
P39057 Prometryn, water, unfiltered, recoverable, micrograms per liter
P38535 Propazine, water, filtered, recoverable, micrograms per liter
P39024 Propazine, water, unfiltered, recoverable, micrograms per liter
P50471 Propiconazole, water, filtered, recoverable, micrograms per liter
P04035 Simazine, water, filtered, recoverable, micrograms per liter
P39025 Simazine, water, unfiltered, coulson conductivity, recoverable, micrograms per liter
P39055 Simazine, water, unfiltered, recoverable, micrograms per liter
P50337 Sulfometuron, water, filtered, recoverable, micrograms per liter
P82670 Tebuthiuron, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82665 Terbacil, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P04032 Terbacil, water, filtered, recoverable, micrograms per liter
P30311 Terbacil, water, unfiltered, recoverable, micrograms per liter
P82678 Triallate, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P49235 Triclopyr, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P82661 Trifluralin, water, filtered (0.7 micron glass fiber filter), recoverable, micrograms per liter
P39030 Trifluralin, water, unfiltered, recoverable, micrograms per liter
P82625 1,2-Dibromo-3-chloropropane, water, unfiltered, recoverable, micrograms per liter