Arsenic in Sequestered Sediments of the Okanogan and Similkameen Rivers, Washington Don Hurst,...
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Arsenic in Sequestered Sediments of the Okanogan and Similkameen Rivers, Washington Don Hurst, Fulcrum Environmental Consulting Patti Stone, Colville Confederated Tribes
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Transcript of Arsenic in Sequestered Sediments of the Okanogan and Similkameen Rivers, Washington Don Hurst,...
Arsenic in Sequestered Sediments of the Okanogan and Similkameen Rivers, Washington
Don Hurst, Fulcrum Environmental ConsultingPatti Stone, Colville Confederated Tribes
Okanogan River Sediment Study,
2001
Spatial Distribution of Arsenic Concentration in Okanogan River/Similkameen River Sediments
0
10
20
30
40
50
60
70
80
90
100
11121314151617181
TotalArsenicmg/kg
TEC9.79 mg/kg
Mouth
of O
kanogan R
iver
Monse
Loup L
oup C
r. &
Malo
tt
*Okanogan River Miles (rm) from Osoyoos Lake to Columbia River 2.5 mg/kg = 50% of method of detection TEC (9.79 mg/kg) = Threshold Effects Concentration (Consensus-Based, D.D. McDonald et al, 2000)
Oro
ville
Os
oyo
os
La
ke
Sim
ilka
me
en
Riv
er
en
ters
Oka
no
ga
n R
ive
r
Mo
sq
uito
Cr.
Ellis
ford
e
Wh
ite
sto
ne
Cr.
An
toin
e C
r.
To
na
ske
t
Bo
na
pa
rte
Cr.
Ae
ne
as
Cr.
Ke
ys
ton
e
Tu
rk C
r.
Jo
hn
so
n C
r.
Riv
ers
ide
Om
ak C
r.
Om
ak
Elg
in C
r.
Oka
no
ga
n
Ta
lan
t C
r.
rm rm rm rm rm rm rm rm
( North) Okanogan River* (South )
Spatial Distribution of Lead Concentration in Okanogan River/Similkameen River Sediments
0
10
20
30
40
50
60
70
11121314151617181
Leadmg/kg
TEC35.8 mg/kg
Mouth
of O
kanogan R
iver
Monse
Loup L
oup C
r. &
Malo
tt*Okanogan River Miles (rm) from Osoyoos Lake to Columbia River 2.5 mg/kg = 50% of method of detection TEC (9.79 mg/kg) = Threshold Effects Concentration (Consensus-Based, D.D. McDonald et al, 2000)
Oro
ville
Os
oyo
os
La
ke
Sim
ilka
me
en
Riv
er
en
ters
Oka
no
ga
n R
ive
r
Mo
sq
uito
Cr.
Ellis
ford
e
Wh
ite
sto
ne
Cr.
An
toin
e C
r.
To
na
ske
t
Bo
na
pa
rte
Cr.
Ae
ne
as
Cr.
Ke
ysto
ne
Tu
rk C
r.
Jo
hn
so
n C
r.
Riv
ers
ide
Om
ak C
r.
Om
ak
Elg
in C
r.
Oka
no
ga
n
Ta
lan
t C
r.
rm rm rm rm rm rm rm rm
( North) Okanogan River* (South )
Similkameen River Sediment StudyProject Impetus
Total Arsenic in Water (μg/l)
River Location River Mile Sept. 2000 April 2001 May 2001
Chopaka Bridge 36.1 1.8 1.7 0.85
Palmer Lake Outlet 19.5 9.7 7.8 5.2
Nighthawk 17.5 2.9 3.0 4.3
Oroville 5.0 3.6 3.2 2.0
TMDL Evaluation for Arsenic in the Similkameen RiverDOE February 2002 Data (Draft)
Similkameen River Sediment Study, 2002
B.C. Archives E-03984
