Branch of Quality Systems


Most Current Cumulative Time Series Charts and Statistical Summaries
for NWQL LS 2060

The Time Series Charts
The charts provide OBSP recovery information for every analyte at different concentrations for every schedule OBSP assesses. The charts exhibit a Locally Weighted Scatterplot Smoothing (LOWESS) line. This line is used to help observe patterns and trends of the data over time. The time series charts also show bias and variability of the OSBP data. The most current time series charts in the table below will be overwritten periodically and will contain data that is currently being reviewed. All data is provisional and may change if the OBSP deems necessary.

There are two tables provided at the bottom of every time series chart that show statistical summaries.

Plotted Points Statistics Table
Description of the OBSP QA recoveries grouped by concentration level. The statistics in the table: mean, median, standard deviation and F-pseudosigma define bias and variability of the OBSP recoveries.

Sample Statistics Table
Counts (N) - The quantity of the variety of items.
Plotted - This number equals the total number in the above table.
Estimated Values - There are a number of reasons the laboratory will estimate (E) a result. If there are 100% of the results estimated the analyte is identified as a permanently estimated compound (analyte name in time series chart will be red).
Deleted Values - The laboratory may delete an entire sample or a single analyte for a number of reasons.
Spiked, Censored - A term for those samples that were spiked and correctly reported as less than a reporting level (possibly a raised reporting level) - the expected concentration was at a lower concentration than the censored result provided by the laboratory.
Spiked - The number of times the OBSP has submitted this analyte to the NWQL.
False Negative - The number of times the laboratory reports this analyte as not present in the sample when it is there.
Not Spiked - The number of times the OBSP has submitted a sample to the appropriate schedule, without this analyte.
False Positive - The number of times the laboratory reports this analyte as present when it is not in the sample.

The charts and data that you might secure from this U.S. Geological Survey (USGS) web page (identified as "OBSP") have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

Lab Schedule 2060 - Polar Pesticides and Metabolites by SPE and HPLC/MS, Filtered
Choose an analyte below or click here for all analytes sorted by NWQL parameter code Parameter CAS#
2,4-D 39732LCM29 94-75-7
2,4-D methyl ester 50470LCM29 1928-38-7
2,4-DB 38746LCM29 94-82-6
2-Hydroxy-4-isopropylamino-6-ethylamino-s-triazine {OIET} {2-Hydroxyatrazine} 50355LCM29 2163-68-0
3(4-chlorophenyl)-1-methyl urea 61692LCM29 5352-88-5
3-Hydroxycarbofuran 49308LCM29 16655-82-6
Acifluorfen 49315LCM29 50594-66-6
Aldicarb 49312LCM29 116-06-3
Aldicarb sulfone 49313LCM29 1646-88-4
Aldicarb sulfoxide 49314LCM29 1646-87-3
Atrazine 39632LCM29 1912-24-9
Bendiocarb 50299LCM29 22781-23-3
Benomyl 50300LCM29 17804-35-2
Bensulfuron-methyl 61693LCM29 83055-99-6
Bentazone 38711LCM29 25057-89-0
Bromacil 04029LCM29 314-40-9
Bromoxynil (E) 49311LCM29 1689-84-5
Caffeine 50305LCM29 58-08-2
Carbaryl 49310LCM29 63-25-2
Carbofuran 49309LCM29 1563-66-2
Chloramben, methyl ester 61188LCM29 7286-84-2
Chlorimuron ethyl (E) 50306LCM29 90982-32-4
Clopyralid 49305LCM29 1702-17-6
Cycloate 04031LCM29 1134-23-2
Dacthal monoacid 49304LCM29 887-54-7
2-Chloro-4-isopropylamino-6-amino-s-triazine {CIAT} {Deethylatrazine} {Desethyl atrazine} 04040LCM29 6190-65-4
2-Chloro-6-ethylamino-4-amino-s-triazine {CEAT} {Deisopropylatrazine} 04038LCM29 1007-28-9
Dicamba 38442LCM29 1918-00-9
Dichloroprop (Dichlorprop) 49302LCM29 120-36-5
Dinoseb 49301LCM29 88-85-7
Diphenamid 04033LCM29 957-51-7
Diuron 49300LCM29 330-54-1
Fenuron 49297LCM29 101-42-8
Flumetsulam 61694LCM29 98967-40-9
Fluometuron 38811LCM29 2164-17-2
Imazaquin (E) 50356LCM29 81335-37-7
Imazethapyr 50407LCM29 81335-77-5
Imidacloprid 61695LCM29 138261-41-3
Linuron 38478LCM29 330-55-2
MCPA 38482LCM29 94-74-6
MCPB 38487LCM29 94-81-5
Metalaxyl 50359LCM29 57837-19-1
Methiocarb 38501LCM29 2032-65-7
Methomyl 49296LCM29 16752-77-5
Metsulfuron, Methyl (E) 61697LCM29 74223-64-6
Neburon 49294LCM29 555-37-3
Nicosulfuron (Accent) (E) 50364LCM29 111991-09-4
Norflurazon 49293LCM29 27314-13-2
Oryzalin 49292LCM29 19044-88-3
Oxamyl 38866LCM29 23135-22-0
Picloram 49291LCM29 1918-02-1
Propham 49236LCM29 122-42-9
Propiconazole (Tilt) 50471LCM29 60207-90-1
Propoxur (E) 38538LCM29 114-26-1
Siduron 38548LCM29 1982-49-6
Sulfometuron methyl 50337LCM29 74222-97-2
Tebuthiuron 82670LCM29 34014-18-1
Terbacil 04032LCM29 5902-51-2
Triclopyr 49235LCM29 55335-06-3

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