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David J. Price, Ph.D. Susan L. Plueger, P.E. 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.

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David J. Price, Ph.D. Susan L. Plueger, P.E. Division of Water Quality

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  1. 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

  2. Gainesway Pond Retrofit Project

  3. The “pond” before construction

  4. Layout Design Firm: CDP Engineers

  5. McConnell Springs Stormwater Quality Wetland Pond

  6. The site before construction

  7. McConnell Springs Welcome Center Design Firm: Carman

  8. Layout

  9. A pond liner installed Boardwalk taking shape The site today

  10. Pollutant Removal Results McConnell Springs Stormwater Quality Wetland Pond

  11. Locating Sampling Sites and Training of Personnel

  12. Sampling Locations M4 M2 M1 M5 M3

  13. Sampling at McConnell Springs Stormwater Quality Wetland Project

  14. 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 Water Quality Parameters Measured at McConnell Springs Stormwater Quality Wetland Project

  15. 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 Metals analyzed by ICP at UK-KGS

  16. 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

  17. 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

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

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

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

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

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

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

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

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

  26. Pollutant Removal Results Gainesway Pond Retrofit Project

  27. Sampling Locations GP5 GP4 FLOW GP3 GP2 GP1

  28. Sampling at Gainesway Pond Stormwater Quality Project

  29. 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

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

  31. Total Ammonia in Water Samples from Gainesway Pond Retrofit Project

  32. Total Phosphorous in Water Samples from Gainesway Pond Retrofit Project

  33. 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

  34. 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

  35. 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

  36. 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

  37. Questions?

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