1. Salmon Falls TMDL Monitoring 2012 Pre-Season Meeting Cayce Dalton, FB Environmental May 23, 2012 South Berwick Town Hall

2. Meeting Agenda 9:00 – 9:05: Welcome 9:05 – 9:20: Past Salmon Falls TMDL Monitoring 9:20 – 9:45: Monitoring in 2012 9:45 – 9:55: Salmon Falls Watershed Collaborative 9:55 – 10:25: Future Monitoring 10:25 – 10:30: Conclusions, Next Steps

3. Total Maximum Daily Load 1999 TMDL Cites data and modeling that show impairment Calculates allowable pollutant loads 2000 Work Plan, revised 2006, outlines this monitoring Link to ME DEP TMDL page For report, see “Salmon Falls” heading http://www.maine.gov/dep/water/monitoring/tmdl/tmdl2.html http://www.maine.gov/dep/water/monitoring/tmdl/tmdl2.html

4. Map Seven locations Bracketing all plants, plus Great Works R. and an estuarine site Four are in impoundments

6. Water Quality Criteria NH & ME Freshwater and tidal Based on Designated Uses & Class

7. July – August Grab Sampling Seven sample locations Some impoundments, some free-flowing Parameters vary by site

8. July – August Grab Sampling All sites: phosphorus (TP & ortho-P), pH, DO, Temp Selected sites: chlorophyll-a, ammonia, nitrate+nitrite, total Kjeldahl nitrogen, transparency Salinity at tidal sites

9. Low flow, check for <114 cfs at Milton 3 Ponds dam Last sample taken by 8 am for low dissolved oxygen 114 cfs

10. July – August Grab Sampling Sample collection by boat Delivered within hours to ME Health and Environmental Lab (HETL) Concerns about detection limit

11. Continuous Dissolved Oxygen Monitoring by ME DEP Data sondes at SF16, SF7 Based on 38 MRSA § 464.13 (2003): – Ignore bottom 0.5m – Thermally stratified waters exempt Barry, please chime in

12. Continuous Dissolved Oxygen Monitoring by ME DEP ME DEP policy, measure 1 st meter below thermocline Depth where temp changes by 1°C /m of depth Thermocline is mobile

13. Continuous Dissolved Oxygen Monitoring by ME DEP ME DEP policy, measure 1 st meter below thermocline Depth where temp changes by 1°C /m of depth Thermocline is mobile

14. Data Summary Slides Barry Mower, ME DEP

15. Nitrogen

17. Chl-a

19. Total Phosphorus

21. 2012 Monitoring Plan Three dates, mid July - August Same sites, parameters at low flow, early AM ME DEP lends data sondes FBE adjusts sondes based on thermocline More information online: http://www.fbenvironmental.com/project_salmonfalls.htmlhttp://www.fbenvironmental.com/project_salmonfalls.html