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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.

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Presentation on theme: "Pollutant Removal Effectiveness of the McConnell Springs Stormwater Quality Wetland Pond and the Gainesway Pond Retrofit Project, Lexington, KY David J."— Presentation transcript:

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 Gainesway Pond Retrofit Project

3 The “pond” before construction

4 Layout Design Firm: CDP Engineers

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9 McConnell Springs Stormwater Quality Wetland Pond McConnell Springs Stormwater Quality Wetland Pond

10 The site before construction

11 Welcome Center McConnell Springs Design Firm: Carman

12 Layout

13 A pond liner installed Boardwalk taking shape The site today

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16 Pollutant Removal Results McConnell Springs Stormwater Quality Wetland Pond Pollutant Removal Results McConnell Springs Stormwater Quality Wetland Pond

17 Locating Sampling Sites and Training of Personnel

18 Sampling Locations M1 M2 M3 M5 M4

19 Sampling at McConnell Springs Stormwater Quality Wetland Project

20 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

21 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

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

23 Nine Sampling Dates pH7.00 – 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

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

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

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

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

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

29 03/26/10 Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project 06/09/10

30 03/26/10 Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project 06/09/10 <0.002 <0.005

31 03/26/10 Metal Concentrations in Water Samples from McConnell Springs Stormwater Quality Wetland Project 06/09/10

32 Pollutant Removal Results Gainesway Pond Retrofit Project Pollutant Removal Results Gainesway Pond Retrofit Project

33 Sampling Locations GP1 GP2 GP3 GP4 GP5 FLOW

34 Sampling at Gainesway Pond Stormwater Quality Project

35 Sampling Dates: 4/2, 6/24, 8/26, 12/2 pH7.00 – 8.85 SU DO 1.12 – 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

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

37 Total Ammonia in Water Samples from Gainesway Pond Retrofit Project

38 Total Phosphorous in Water Samples from Gainesway Pond Retrofit Project

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

40 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

41 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

42 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

43 Questions?


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