South River Mercury TMDL – June 2005

Jack Eggleston

• Monitoring Stations • Stream Flow • Water Sampling• Next Steps Plans

South River Mercury TMDL: Study Goals

• Characterize cycling of total mercury and methyl mercury

• Develop mathematical models for simulating surface water

flows and methyl mercury production and transport

• Determine loading reductions needed to achieve fish

tissue Hg levels of less than 0.5 ppm

South River Watershed and WQ Monitoring Points

Waynesboro

Dooms

Crimora

Grottoes

SOUTH RIVER AT HARRISTON, VA

SOUTH RIVER NrWAYNESBORO,VA

Continuous WQ Station

STREAMFLOW GAGE

Waynesboro Dooms Harriston

Installation of Monitoring Stations

Complete CompleteIn Progress

Data on the Web

01626000 SOUTH RIVER NEAR WAYNESBORO, VA

http://waterdata.usgs.gov/nwis/uv?site_no=01626000

01626920 SOUTH RIVER, OLD RT 611 AT DOOMS, Va.

http://waterdata.usgs.gov/nwis/uv?site_no=01626920

01627500 SOUTH RIVER AT HARRISTON, VA

http://waterdata.usgs.gov/nwis/uv?site_no=01627500

Continuous Monitoring Results - Dooms

0

2

4

6

8

10

5/24 5/25 5/26 5/27 5/28 5/29 5/30 5/31 6/1 6/2

pH

0

1

2

3

4

5

6

7

8

9

10

Tu

rbid

ity

(FN

U)

Analysis of Surface Water

• First sampling May 2 (results not back yet)

• Regular sampling on a monthly schedule

• Stormwater sampling when possible

• Hg and MeHg, both filtered and unfiltered will continue to be analyzed for now

• Sulfate, DOC, Chloride, Sediment conc. are also analyzed

South River Flows - Waynesboro and Harriston, May 2005

90

140

190

240

290

340

28-Apr-05 5-May-05 12-May-05 19-May-05 26-May-05 2-Jun-05Date

Str

eam

flo

w (

cfs)

Wboro

Harriston

South River Flows - Waynesboro and Harriston, May 2005

90

140

190

240

290

340

18-May-05 19-May-05 20-May-05 21-May-05 22-May-05 23-May-05Date

Str

eam

flo

w (

cfs)

Wboro - USGS 01626000

Harriston - 01627500

Upcoming Work

• Finish equipment installation at Waynesboro station

• Expand monthly sampling to all stations

• QA/QC on analytical procedures/results

• Finalize data processing steps for continuous QW data

• Start storm sampling