Division of Water Quality 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

Gainesway Pond Retrofit Project

The “pond” before construction

Layout Design Firm: CDP Engineers

McConnell Springs Stormwater Quality Wetland Pond

The site before construction

McConnell Springs Welcome Center Design Firm: Carman

Layout

A pond liner installed Boardwalk taking shape The site today

Pollutant Removal Results McConnell Springs Stormwater Quality Wetland Pond

Locating Sampling Sites and Training of Personnel

Sampling Locations M4 M2 M1 M5 M3

Sampling at McConnell Springs Stormwater Quality Wetland Project

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

Rainfall Levels Recorded at the Bluegrass Airport for 2010 6/14 12/2 6/9 4/26 7/26 4/22 3/26 8/27

Water Quality Results for 2010 McConnell Springs Water Quality Results for 2010 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

Total Suspended Solids (TSS) in Water Samples from McConnell Springs Stormwater Quality Wetland Project Year 2010

Total Suspended Solids (TSS) in Water Samples from McConnell Springs Stormwater Quality Wetland Project Spring-Summer

Total Suspended Solids (TSS) in Water Samples from McConnell Springs Stormwater Quality Wetland Project Summer-Winter

Total Phosphorous in Water Samples from McConnell Springs Stormwater Quality Wetland Project

Bacterial Counts (E. coli) in Water Samples from McConnell Springs Stormwater Quality Wetland Project

Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project 03/26/10 06/09/10

Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project <0.005 <0.005 <0.002 <0.002 <0.002 03/26/10 06/09/10

Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project 03/26/10 06/09/10

Pollutant Removal Results Gainesway Pond Retrofit Project

Sampling Locations GP5 GP4 FLOW GP3 GP2 GP1

Sampling at Gainesway Pond Stormwater Quality Project

Water Quality Results for 2010 Gainesway Pond Water Quality Results for 2010 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

Total Suspended Solids (TSS) in Water Samples from Gainesway Pond Retrofit Project

Total Ammonia in Water Samples from Gainesway Pond Retrofit Project

Total Phosphorous in Water Samples from Gainesway Pond Retrofit Project

CONCLUSIONS McConnell Springs pH, dissolved oxygen, alkalinity and hardness were within normal parameters Total suspended solids decreased through the stormwater facility Ammonia levels decreased at sites M4 and M5 Nitrate and nitrite levels were low – continue monitoring Total phosphorous and orthophosphates decreased over time

CONCLUSIONS McConnell Springs Counts for E. coli and other coliforms were lowest at sites M4 and M5 Metals not detected in any of the sites: Antimony, Beryllium, Cadmium, Chromium, Gold, Lead, Selenium, Silver, Thallium, Strontium, & Vanadium Reductions of Aluminum, Copper, Iron, Nickel, Sulfur & Zinc through the stormwater facility

CONCLUSIONS Gainesway Pond pH, dissolved oxygen, alkalinity and hardness were within normal parameters Total suspended solids were highest in the ponds (GP4 & GP5) Spring/summer ammonia levels decreased at GP4 & GP5, but Fall/Winter levels increased Levels for total phosphorous, orthophosphates, nitrate and nitrite were similar in Spring/Summer, but increased in Fall/Winter – Continue monitoring

RECOMENDATIONS Based on the preliminary data, it appears that both stormwater structures are performing as expected Continue monitoring in 2011 (at least every other month)  Significant for phosphorous, nitrates, nitrites, & metals which could be detrimental

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