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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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
Loading InputsBetween Key Sample Stations
Summer Base Flow
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
Loading InputsBetween Key Sample Stations
Flood Flow
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
Loading InputsBetween Key Sample StationsAdd Moderate Flow in Feb 05
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
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
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