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Most Current Time Series Charts for NWQL LC 8093


The Time Series Charts
The charts provide OBSP recovery information for every analyte at different concentrations for every method 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 method, 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 Code 8093 - Halo-organic compounds in solids/sediment (Kolpin)
Choose an analyte below or click here for all analytes sorted by NWQL parameter code Parameter CAS#
1,2-Bis(2,4,6-tribromophenoxy)ethane 64868GM014 37853-59-1
2,2',3,4,4',5',6-Heptabromodiphenyl ether (PBDE 183) 64860GM014 207122-16-5
2,2',3,4,4',5'-Hexabromodiphenyl ether (PBDE138) 64857GM014 182677-30-1
2,2',3,4,4'-Pentabromodiphenyl ether (PBDE 85) 64854GM014 182346-21-0
2,2',4,4',5,5'-Hexabromodiphenylether (PBDE 153) 64858GM014 68631-49-2
2,2',4,4',5,6'-Hexabromodiphenyl ether (PBDE 154) 64859GM014 207122-15-4
2,2',4,4',5-Pentabromodiphenyl ether (PBDE 99) 64855GM014 60348-60-9
2,2',4,4',6-Pentabromodiphenyl ether (PBDE 100) 64856GM014 189084-64-8
2,2',4,4'-Tetrabromodiphenylether (PBDE 47) 63166GM014 5436-43-1
2,3',4,4'-Tetrabromodiphenyl ether (PBDE 66) 64852GM014 189084-61-5
2,3',4',6-Tetrabromodiphenyl ether (PBDE 71) 64853GM014 189084-62-6
alpha-Endosulfan 63259GM014 959-98-8
Benfluralin 63265GM014 1861-40-1
beta-Endosulfan 63260GCM14 33213-65-9
bis(Hexachlorocyclopentadieno) cyclooctane [Dechlorane Plus] 65220GM014 13560-89-9
Chlorpyrifos 63273GM014 2921-88-2
cis-Chlordane 63271GM014 5103-71-9
cis-Nonachlor 63338GM014 5103-73-1
Cyfluthrin 63279GM014 68359-37-5
Dacthal 63282GM014 1861-32-1
Desulfinylfipronil 63316GM014
Dieldrin 63289GM014 60-57-1
Endosulfan sulfate 63298GCM14 1031-07-8
Fipronil sulfide 63314GM014 120067-83-6
Hexachlorobenzene 63631GM014 118-74-1
lambda-Cyhalothrin 63280GM014 91465-08-6
Methyl triclosan 63639GM014 4640-01-1
Octachlorostyrene 65217GM014 29082-74-4
Oxychlordane 64866GM014 27304-13-8
Oxyfluorfen 63341GM014 42874-03-3
p,p'-DDD 63346GM014 72-54-8
p,p'-DDE 63347GM014 72-55-9
p,p'-DDT 63345GM014 50-29-3
pcb, congener, iupac #101 64729GM014 37680-73-2
pcb, congener, iupac #110 64730GM014 38380-03-9
pcb, congener, iupac #118 64731GM014 31508-00-6
pcb, congener, iupac #138 64732GM014 35065-28-2
pcb, congener, iupac #146 64733GM014 51908-16-8
pcb, congener, iupac #149 64734GM014 38380-04-0
pcb, congener, iupac #151 64735GM014 52663-63-5
pcb, congener, iupac #170 64736GM014 35065-30-6
pcb, congener, iupac #174 64737GM014 38411-25-5
pcb, congener, iupac #177 64738GM014 52663-70-4
pcb, congener, iupac #180 64739GM014 35065-29-3
pcb, congener, iupac #183 64740GM014 52663-69-1
pcb, congener, iupac #187 64741GM014 52663-68-0
pcb, congener, iupac #194 64742GM014 35694-08-7
pcb, congener, iupac #206 64743GM014 40186-72-9
pcb, congener, iupac #49 64725GM014 41464-40-8
pcb, congener, iupac #52 64726GM014 35693-99-3
pcb, congener, iupac #70 64727GM014 32598-11-1
Pendimethalin 63353GM014 40487-42-1
Pentabromotoluene 64867GM014 87-83-2
Pentachloroanisole 64119GM014 1825-21-4
Pentachloronitrobenzene 63650GM014 82-68-8
Tefluthrin 63377GM014 79538-32-2
Tetradifon 63665GM014 116-29-0
trans-Chlordane 63272GM014 5103-74-2
trans-Nonachlor 63339GM014 39765-80-5
Trifluralin 63390GM014 1582-09-8

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