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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![Page 1: Turner/Jensen Updates · SR-REF to Constitution Park -1.5 to 0.3 1 1230 24.4 1.2 Constitution Park to Dooms 0.3 to 5.5 14.61689 -14.1 12.9 Dooms to Crimora 5.5 to 10.5 -4.5 374 14.4](https://reader034.vdocuments.net/reader034/viewer/2022050522/5fa5448dc794ad1ff91376ca/html5/thumbnails/1.jpg)
Turner/Jensen Updates
• Concurrent Sampling• Hydrosol Results• Unusual Sfc Water Results from Crimora• Instream Loading Calculations• Reconsidering Plant Reach Sources• Mapping Scour Routes
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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
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• Dupont and VDEQ “field filtered”• USGS “lab filtered”• Dupont used pump to sample• USGS and VDEQ “dipped” samples• Some results from USGS still pending
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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
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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
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Hydrosol Results
September 13, 2005
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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
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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
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Anomaly at Crimora
September 18, 2005
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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
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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
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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
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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
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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
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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
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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
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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
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Plant ReachMain St
Wayne Ave
Plant
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Plant ReachPossible Explanations for Plant Reach Loading
Main St
Wayne Ave
Plant
TSS Exchange with Sediments?
Rockfish Run?
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Plant ReachPossible Explanations for Plant Reach Loading
Main St
Wayne Ave
Plant
Scoured Floodplain?
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Plant Reach Floodplain
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