turner/jensen updates · sr-ref to constitution park -1.5 to 0.3 1 1230 24.4 1.2 constitution park...

Turner/Jensen Updates

• Concurrent Sampling• Hydrosol Results• Unusual Sfc Water Results from Crimora• Instream Loading Calculations• Reconsidering Plant Reach Sources• Mapping Scour Routes

Concurrent Sfc H20 Sampling(Dupont, VDEQ, USGS)

• September 6, 2005 • Two locations

– Lyndhurst Ave, low/bkg Hg, 1 sample– Dooms, high Hg, 3 samples

• Three laboratories– StudioG/USGS ran THg and MHg– VDEQ ran THg only

• Each group provided samples to other two groups

• Dupont and VDEQ “field filtered”• USGS “lab filtered”• Dupont used pump to sample• USGS and VDEQ “dipped” samples• Some results from USGS still pending

Studio Geochimica-Dooms

0

10

20

30

40

50

60

12:45 14:00 15:00

Sample Time

Tota

l Hg

(ng/

L)

Dupont THgVDEQ THgUSGS THg

Studio Geochimca-Dooms

0

2

4

6

8

10

12:45 14:00 15:00

Sample

Tota

l Dis

solv

ed H

g (h

g/L)

Dupont DHgVDEQ DHgUSGS DHg-SGUSGS DHg-GS

USG

S Filt &Anal

USG

S Filt&Anal

SG

Filt

SG

Filt

SG

Filt

Hydrosol Results

September 13, 2005

Total Mercury in Hydrosol 9/05ug/g, dry wt

0

10

20

30

40

50

60

70

SR-RF

C. Park

B. Park

Dooms

Crimora

Fores

tryHarr

iston

G. Park

Port R

.

I Ford

Station

THg & MHg in Hydrosol 9/05

0

20

40

60

80

100

120

140

SR-RF

C. Park

B. Park

Dooms

Crimora

Fores

tryHarr

iston

G. Park

Port R.

I Ford

Station

THg, ug/gMHg, ng/g

Anomaly at Crimora

September 18, 2005

Unusual THg/MeHg ResultsNear Crimora-Sept 2005 (ng/L)

Transect “BNK”DHg=11.1DMeHg=1.089/18/05

B&T “CR”THg=45.1DHg=7.18TMeHg=1.09DMeHg=0.899/13/05

WPT009DHg=21.2/19.0DMeHg=9.09/9.499/18/05

Dissolved Surface WaterSept 2004 - "Transect" Sampling Averages

0

5

10

15

20

25

Const

Park

2ndS

tBa

sic P

arkKa

tie C

oreHors

esho

eHoll

oway

FEr

oded

Ban

kFo

restry

P Rep

ublic

"009

""0

09" D

upOxb

owGen

icom D

itch

FluxC

h 14h

Station

Con

cent

ratio

n, n

THgMHg

Very Preliminary River Loadings4 Surface Water Sampling Events

• Assumptions– Used unfiltered THg concentration data at 14

stations and 4 sampling events– Interpolated discharges between SR-Ref and

Harriston– Loading = Concentration * Discharge– Loading inputs between stations = Differences

in loading between stations

Loading InputsBetween Key Sample Stations

Reaches RRM 4-Aug Flood 04 5-Feb 5-SepSR-REF to Constitution Park -1.5 to 0.3 1 1230 24.4 1.2Constitution Park to Dooms 0.3 to 5.5 14.6 1689 -14.1 12.9

Dooms to Crimora 5.5 to 10.5 -4.5 374 14.4 -8Crimora to Harriston 10.5 to 17 0.4 2842 -1.5 -0.3

Harriston to Port Republic 17 to 25 -3.8 211 -5.9 -0.2


Summer Base Flow





Flood Flow




Loading InputsBetween Key Sample StationsAdd Moderate Flow in Feb 05




Very Preliminary Loading Indications

• Higher THg inputs above Constitution Park at moderate to high flow

• Minimal THg inputs above Constitution Park during 2 very low flow samplings

• During flood of 9/04, inputs continued along entire South River below plant

• During low to moderate flow, inputs limited to upper river to Dooms or Crimora

Plant ReachMain St

Wayne Ave

Plant

Plant ReachPossible Explanations for Plant Reach Loading

Main St

Wayne Ave

Plant

TSS Exchange with Sediments?

Rockfish Run?

Plant ReachPossible Explanations for Plant Reach Loading

Main St

Wayne Ave

Plant

Scoured Floodplain?

Plant Reach Floodplain

turner/jensen updates · sr-ref to constitution park -1.5 to 0.3 1 1230 24.4 1.2 constitution park...

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