pollutant removal effectiveness of the mcconnell springs stormwater quality wetland pond and the...
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Pollutant Removal Effectiveness of the McConnell Springs Stormwater Quality Wetland Pond
and the Gainesway Pond Retrofit Project, Lexington, KY
David J. Price, Ph.D.Susan L. Plueger, P.E.
Division of Water Quality
Funded in part through §319(h) Non-Point Source Implementation Grants from the
U.S. EPA administered by KDOW
A pond liner installedA pond liner installed Boardwalk taking shapeBoardwalk taking shape
The site today
Pollutant Removal Results
McConnell Springs Stormwater Quality
Wetland Pond
Pollutant Removal Results
McConnell Springs Stormwater Quality
Wetland Pond
Water Quality Parameters Measured at McConnell Springs Stormwater Quality Wetland Project
• Temperature
• pH
• ORP
• Dissolved Oxygen
• Conductivity
• Total Dissolved Solids
• Salinity
• Alkalinity
• Hardness
• Carbonaceous Biological Oxygen Demand (CBOD)
• Total Suspended Solids
• Total Ammonia
• Nitrate
• Nitrite
• Total Phosphorous
• Ortho-phosphate
• E. coli
• Other Coliforms
• Turbidity
• Clarity
• Depth
Metals analyzed by ICP at UK-KGS• Aluminum• Antimony• Arsenic• Barium• Beryllium• Boron• Cadmium• Calcium• Chromium• Cobalt• Copper• Gold• Iron• Lead• Lithium
• Magnesium• Manganese• Nickel• Phosphorus• Potassium• Selenium• Silicon• Silver• Sodium• Strontium• Sulfur• Thallium• Tin• Vanadium• Zinc
0.0
0.5
1.0
1.5
2.0
2.5
3.0
1/1
1/1
5
1/2
9
2/1
2
2/2
6
3/1
2
3/2
6
4/9
4/2
3
5/7
5/2
1
6/4
6/1
8
7/2
7/1
6
7/3
0
8/1
3
8/2
7
9/1
0
9/2
4
10
/8
10
/22
11
/5
11
/19
12
/3
Rai
nfa
ll (
Inch
es)
3/26 4/22
Rainfall Levels Recorded at the Bluegrass Airport for 2010
4/26
6/9
6/14
7/26
8/27
12/2
• Nine Sampling Dates
• pH 7.00 – 9.75 SU
• DO 3.03 – 8.40 mg/L
• Conductivity 81 – 1614 µS/cm
• Alkalinity 45 – 210 mg/L
• Hardness 65 – 1650 mg/L
• Nitrate <0.01 – 5.86 mg/L
• Nitrite <0.05 – 0.52 mg/L
McConnell Springs Water Quality Results for 2010
0
5
10
15
20
25
30
35
40
M1 M2 M3 M4 M5
Sampling Station
TS
S (
mg
/L)
3/26
4/26
6/9
6/14
7/26
8/27
12/2
Total Suspended Solids (TSS) in Water Samples from McConnell Springs Stormwater Quality Wetland Project
Year 2010
0
5
10
15
20
25
30
35
40
M1 M2 M3 M4 M5
Sampling Station
TS
S (
mg
/L)
3/26
4/26
6/9
6/14
Total Suspended Solids (TSS) in Water Samples from McConnell Springs Stormwater Quality Wetland Project
Spring-Summer
0
5
10
15
20
25
30
35
40
M1 M2 M3 M4 M5
Sampling Station
TS
S (
mg
/L)
7/26
8/27
12/2
Total Suspended Solids (TSS) in Water Samples from McConnell Springs Stormwater Quality Wetland Project
Summer-Winter
0.00
0.10
0.20
0.30
0.40
0.50
0.60
M1 M2 M3 M4 M5
Sampling Station
To
tal
Ph
osp
ho
rou
s (m
g/L
)
6/96/147/268/2712/2
Total Phosphorous in Water Samples from McConnell Springs Stormwater Quality Wetland Project
0
2000
4000
6000
8000
10000
M1 M2 M3 M4 M5
Sampling Station
E.
co
li (
CF
U/1
00
mL
) 3/264/224/266/96/147/268/2712/2
Bacterial Counts (E. coli) in Water Samples from McConnell Springs Stormwater Quality Wetland Project
0.00
0.20
0.40
0.60
0.80
1.00
1.20
Alu
min
ium
(m
g/L
)
03/26/10
0.00
0.20
0.40
0.60
0.80
1.00
1.20
M1 M2 M3 M4 M1 M2 M3 M4
Iro
n (
mg
/L)
Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project
06/09/10
0.000
0.002
0.004
0.006
0.008
0.010
0.012
0.014
Co
pp
er (
mg
/L)
03/26/10
0.000
0.001
0.002
0.003
0.004
M1 M2 M3 M4 M1 M2 M3 M4
Nic
kel
(mg
/L)
Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project
06/09/10
<0.002 <0.002 <0.002
<0.005<0.005
0.000
1.000
2.000
3.000
4.000
5.000
6.000
Su
lfu
r (m
g/L
)
03/26/10
0.000
0.010
0.020
0.030
0.040
0.050
0.060
M1 M2 M3 M4 M1 M2 M3 M4
Zin
c (m
g/L
)
Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project
06/09/10
Pollutant Removal Results
Gainesway Pond Retrofit Project
Pollutant Removal Results
Gainesway Pond Retrofit Project
• Sampling Dates: 4/2, 6/24, 8/26, 12/2
• pH 7.00 – 8.85 SU
• DO 1.12 – 12.68 mg/L
• Conductivity 328 – 1231 µS/cm
• Alkalinity 126 – 288 mg/L
• Hardness 166 – 445 mg/L
• Nitrate <1.00 – 7.50 mg/L
• Nitrite <0.05 – 0.17 mg/L
Gainesway Pond Water Quality Results for 2010
0
5
10
15
20
25
GP1 GP2 GP3 GP4 GP5
Sampling Station
TS
S (
mg
/L) 4/2
6/24
8/26
12/2
Total Suspended Solids (TSS) in Water Samples from Gainesway Pond Retrofit Project
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
GP1 GP2 GP3 GP4 GP5
Sampling Station
To
tal
Am
mo
nia
(m
g/L
)
4/26/248/2612/2
Total Ammonia in Water Samples from Gainesway Pond Retrofit Project
0.000.05
0.100.150.200.25
0.300.350.40
0.450.50
GP1 GP2 GP3 GP4 GP5
Sampling Station
To
tal
Ph
osp
ho
rou
s (m
g/L
)
4/26/248/2612/2
Total Phosphorous in Water Samples from Gainesway Pond Retrofit Project
CONCLUSIONSCONCLUSIONSMcConnell SpringsMcConnell Springs
● pH, dissolved oxygen, alkalinity and hardness pH, dissolved oxygen, alkalinity and hardness were within normal parameterswere within normal parameters
● Total suspended solids decreased through the Total suspended solids decreased through the stormwater facilitystormwater facility
● Ammonia levels decreased at sites M4 and M5Ammonia levels decreased at sites M4 and M5
● Nitrate and nitrite levels were low Nitrate and nitrite levels were low – – continue monitoringcontinue monitoring
● Total phosphorous and orthophosphates Total phosphorous and orthophosphates decreased over timedecreased over time
CONCLUSIONSCONCLUSIONSMcConnell SpringsMcConnell Springs
● Counts for Counts for E. coliE. coli and other coliforms were lowest and other coliforms were lowest at sites M4 and M5at sites M4 and M5
● Metals not detected in any of the sites: Metals not detected in any of the sites: Antimony, Beryllium, Cadmium, Chromium, Gold, Lead, Antimony, Beryllium, Cadmium, Chromium, Gold, Lead, Selenium, Silver, Thallium, Strontium, & VanadiumSelenium, Silver, Thallium, Strontium, & Vanadium
● Reductions of Aluminum, Copper, Iron, Nickel, Sulfur Reductions of Aluminum, Copper, Iron, Nickel, Sulfur & Zinc through the stormwater facility& Zinc through the stormwater facility
CONCLUSIONSCONCLUSIONSGainesway PondGainesway Pond
● pH, dissolved oxygen, alkalinity and hardness pH, dissolved oxygen, alkalinity and hardness were within normal parameterswere within normal parameters
● Total suspended solids were highest in theTotal suspended solids were highest in theponds (GP4 & GP5)ponds (GP4 & GP5)
● Spring/summer ammonia levels decreased Spring/summer ammonia levels decreased at GP4 & GP5, but Fall/Winter levels increasedat GP4 & GP5, but Fall/Winter levels increased
● Levels for total phosphorous, orthophosphates,Levels for total phosphorous, orthophosphates,nitrate and nitrite were similar in Spring/Summer, nitrate and nitrite were similar in Spring/Summer, but increased in Fall/Winterbut increased in Fall/Winter
– – Continue monitoringContinue monitoring
RECOMENDATIONSRECOMENDATIONS
Based on the preliminary data, it appears that bothBased on the preliminary data, it appears that bothstormwater structures are performing as expectedstormwater structures are performing as expected
Continue monitoring in 2011 (at least every other month)Continue monitoring in 2011 (at least every other month)
Significant for phosphorous, nitrates, nitrites, Significant for phosphorous, nitrates, nitrites, & metals which could be detrimental& metals which could be detrimental