APPENDIX F DRAIN-BY-DRAIN BOX PLOTS OF STORMWATER,...
Transcript of APPENDIX F DRAIN-BY-DRAIN BOX PLOTS OF STORMWATER,...
APPENDIX F
DRAIN-BY-DRAIN BOX PLOTS OF STORMWATER, BASE FLOW, AND STORM SEDIMENT DATA
Summary charts were prepared and statistical tests were performed on the following indicator parameters: Total Suspended Solids (TSS) Total lead Total zinc Polycyclic Aromatic Hydrocarbons (PAHs, including phenanthrene, pyrene, and
indeno[1,2,3-cd]pyrene) Bis(2-ethylhexyl)phthalate (DEHP) Mercury (Storm Sediment Only) Butylbenzylphthalate and Total Phthalates (Storm Sediment Only) Polychlorinated Biphenyls (PCBs) (Storm Sediment Only) 4,4’-DDT (Storm Sediment Only) Total Petroleum Hydrocarbons (Storm Sediment Only)
Figure F-1.Total Suspended Solids (TSS) Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
400
100
200
300
400Co
ncen
tration in m
g/L
441
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
400
0
100
200
300
400Co
ncen
tration in m
g/L
Drain Number230 235 237A 237B 243 245 254
441
Figure F-2.Lead Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
50
100
150
200
250
Concen
tration in ug/L
368 379353
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
50
100
150
200
250
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
368 379353
Figure F-3.Zinc Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
100
200
300
400
500
600
Concen
tration in ug/L
1170721
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
100
200
300
400
500
600
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
1170721
Figure F-4.Phenanthrene Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
0.2
0.4
0.6
0.8
1
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
1.65
Figure F-5.Fluoranthene Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
0.5
1
1.5
2
2.5
Concen
tration in ug/L
Drain Number
3.96
230 235 237A 237B 243 245 254
Figure F-6.Pyrene Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
0.5
1
1.5
2
2.5
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
4.12
Figure F-7.Indeno(1,2,3-c,d)pyrene Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-8.Total Low Molecular Weight Polycyclic Aromatic Hydrocarbons (LPAHs) Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
0.2
0.4
0.6
0.8
1
1.2
1.4
Concen
tration in ug/L
Drain Number
4.614.93
230 235 237A 237B 243 245 254
Figure F-9.Total High Molecular Weight Polycyclic Aromatic Hydrocarbons (HPAHs) Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10.5210.89
0
2
4
6
8
10
Concen
tration in ug/L
Drain Number
13.56
230 235 237A 237B 243 245 254
Figure F-10.Bis(2-ethylhexyl)phthlate (DEHP) Drain-by-Drain Comparison in Stormwater
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
5
10
15
20
25
30
35
40
45
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
97
Figure F-11.Total Suspended Solids (TSS) Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
10
100
1000Co
ncen
tration in m
g/L
230 235 237A 237B 243 245 254
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1
10
100
1000Co
ncen
tration in m
g/L
Drain Number230 235 237A 237B 243 245 254
Figure F-12.Lead Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
1
10
100
1000Co
ncen
tration in ug/L
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.1
1
10
100
1000Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-13.Zinc Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
1170
100
1000
Concen
tration in ug/L
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1170
10
100
1000
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-14.Phenanthrene Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1.65
0.001
0.01
0.1
1
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-15.Fluoranthene Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.001
0.01
0.1
1
10Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-16.Pyrene Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.001
0.01
0.1
1
10Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-17.Indeno(1,2,3-c,d)pyrene Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.001
0.01
0.1
1Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-18.Total Low Molecular Weight Polycyclic Aromatic Hydrocarbons (LPAHs) Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.001
0.01
0.1
1
10Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-19.Total High Molecular Weight Polycyclic Aromatic Hydrocarbons (HPAHs) Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10.5210.89 13.56
0.01
0.1
1
10
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-20.Bis(2-ethylhexyl)phthlate (DEHP) Drain-by-Drain Comparison in Stormwater [Log Scale]
September 2001 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.1
1
10
100Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-21.Total Suspended Solids (TSS) Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
20
40
60
80
100
Concen
tration in m
g/L
Drain Number230 235 237A 237B 243 245 254
319 258246
140
Figure F-22.Lead Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
91
0
10
20
30
40
50
60
70
80
90
Concen
tration in ug/L
Drain Number
112
230 235 237A 237B 243 245 254
Figure F-23.Zinc Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
401
0
50
100
150
200
250
300
350
400
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
19501400860
Figure F-24.Phenanthrene Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.149
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
Concen
tration in ug/L
Drain Number
0.684
230 235 237A 237B 243 245 254
Figure F-25.Fluoranthene Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
0.05
0.1
0.15
0.2
0.25
0.3Co
ncen
tration in ug/L
Drain Number
1.14
230 235 237A 237B 243 245 254
Figure F-26.Pyrene Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.253 0.255
0
0.05
0.1
0.15
0.2
0.25
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
0.879
Figure F-27.Indeno(1,2,3-c,d)pyrene Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.053
0
0.01
0.02
0.03
0.04
0.05
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
0.115
Figure F-28.Total Low Molecular Weight Polycyclic Aromatic Hydrocarbons (LPAHs) Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Concen
tration in ug/L
Drain Number
3.28
230 235 237A 237B 243 245 254
0.90
Figure F-29.Total High Molecular Weight Polycyclic Aromatic Hydrocarbons (HPAHs) Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1.21 1.19
0
0.2
0.4
0.6
0.8
1
1.2
Concen
tration in ug/L
Drain Number
3.29
230 235 237A 237B 243 245 254
1.64
Figure F-30.Bis(2-ethylhexyl)phthalate (DEHP) Drain-by-Drain Comparison in Base Flow
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0
1
2
3
4
5
6
7
8
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
33 21 16
Figure F-31.Total Suspended Solids (TSS) Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.1
1
10
100
1000Co
ncen
tration in m
g/L
Drain Number
230 235 237A 237B 243 245 254
Figure F-32.Lead Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
112
0.01
0.1
1
10
100
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-33.Zinc Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
19501400
1
10
100
1000
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-34.Phenanthrene Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.001
0.01
0.1
1Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-35.Fluoranthene Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1.14
0.001
0.01
0.1
1
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-36.Pyrene Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.001
0.01
0.1
1Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-37.Indeno(1,2,3-c,d)pyrene Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.115
0.001
0.01
0.1
Concen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-38.Total Low Molecular Weight Polycyclic Aromatic Hydrocarbons (LPAHs) Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.001
0.01
0.1
1
10Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-39.Total High Molecular Weight Polycyclic Aromatic Hydrocarbons (HPAHs) Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.01
0.1
1
10Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-40.Bis(2-ethylhexyl)phthalate (DEHP) Drain-by-Drain Comparison in Base Flow [Log Scale]
January 2002 - September 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.1
1
10
100Co
ncen
tration in ug/L
Drain Number230 235 237A 237B 243 245 254
Figure F-41.Lead Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-200
0
200
400
600
800
1000
1200
1400
1600Co
ncen
trat
ion
in m
g/kg
Drain Number
Figure F-42.Mercury Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6Co
ncen
trat
ion
in m
g/kg
Drain Number
Figure F-43.Zinc Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-500
0
500
1000
1500
2000
2500
3000
3500Co
ncen
trat
ion
in m
g/kg
Drain Number
Figure F-44.Phenanthrene Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-1000
0
1000
2000
3000
4000
5000
6000Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-45.Pyrene Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-2000
0
2000
4000
6000
8000
10000
12000Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-46.Indeno(1,2,3-c,d)pyrene Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-500
0
500
1000
1500
2000
2500
3000Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-47.Bis(2-ethylhexyl)phthalate (DEHP) Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-5000
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-48.Butylbenzylphthalate Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245-20000
0
20000
40000
60000
80000
100000
120000
140000
160000
180000Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-49.Total Phthalates Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-50000
0
50000
100000
150000
200000
250000Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-50.4,4'-DDT Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-5
0
5
10
15
20
25
30
35Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-51.Total PCBs Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-100
0
100
200
300
400
500
600
700
800Co
ncen
trat
ion
in u
g/kg
Drain Number
Figure F-52.TPH-Oil Drain-by-Drain Comparison in Storm Sediment
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
OUTFALL = 230 OUTFALL = 235 OUTFALL = 237A OUTFALL = 237B OUTFALL = 243 OUTFALL = 245
-2000
-1000
0
1000
2000
3000
4000
5000
6000
7000
8000
9000Co
ncen
trat
ion
in m
g/kg
Drain Number
Figure F-53.Lead Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10
100
1,000
10,000Co
ncen
trat
ion
in m
g/kg
Drain Number230 235 237A 237B 243 245
Figure F-54.Mercury Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
0.01
0.1
1
10Co
ncen
trat
ion
in m
g/kg
Drain Number230 235 237A 237B 243 245
Figure F-55.Zinc Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10
100
1,000
10,000Co
ncen
trat
ion
in m
g/kg
Drain Number
230 235 237A 237B 243 245
Figure F-56.Phenanthrene Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10
100
1,000
10,000Co
ncen
trat
ion
in u
g/kg
Drain Number230 235 237A 237B 243 245
Figure F-57.Pyrene Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10
100
1,000
10,000Co
ncen
trat
ion
in u
g/kg
Drain Number
230 235 237A 237B 243 245
Figure F-58.Indeno(1,2,3-c,d)pyrene Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10
100
1,000
10,000Co
ncen
trat
ion
in u
g/kg
Drain Number
230 235 237A 237B 243 245
Figure F-59.Bis(2-ethylhexyl)phthalate (DEHP) Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1,000
10,000
100,000Co
ncen
trat
ion
in u
g/kg
Drain Number230 235 237A 237B 243 245
Figure F-60.Butylbenzylphthalate Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
100
1,000
10,000
100,000
1,000,000Co
ncen
trat
ion
in u
g/kg
Drain Number
230 235 237A 237B 243 245
Figure F-61.Total Phthalates Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1,000
10,000
100,000
1,000,000Co
ncen
trat
ion
in u
g/kg
Drain Number230 235 237A 237B 243 245
Figure F-62.4,4'-DDT Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1
10
100Co
ncen
trat
ion
in u
g/kg
Drain Number230 235 237A 237B 243 245
Figure F-63.Total PCBs Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
1
10
100
1000Co
ncen
trat
ion
in u
g/kg
Drain Number
230 235 237A 237B 243 245
Figure F-64.TPH-Oil Drain-by-Drain Comparison in Storm Sediment [Log Scale]
March 2002 - August 2010
Key: MedianMean
Note:
Moderate Outlier (Value is greater than the third quartile plus 1.5 * interquartile range (IQR) or less than the first quartile minus 1.5 * IQR)Extreme Outlier (Value is greater than the third quartile plus 3.0 * interquartile range (IQR) or less than the first quartile minus 3.0 * IQR)
Box boundaries display the IQR of the distribution ranging from the first quartile to the third. The central 50% of data is within the box boundaries. The whiskers represent the remaining data minus the outliers.
10
100
1,000
10,000Co
ncen
trat
ion
in m
g/kg
Drain Number
230 235 237A 237B 243 245