tuba city open dump - nuclear regulatory commission · tuba city open dump nnepa h.haven 11/07/02...
TRANSCRIPT
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HOT SPOT
above 100 ug/L Ur an ium
Proposed Moni tor i ngWel l Locat i on
NAV 1 NAV 2NAV 3
NAV 4
> 20 ug/L uranium
Figu
re 3
20
MW 22MW 23
MW 21
MW 17 MW 18
MW 7MW 13D
MW 9D
MW 27
MW 28
MW 11D
MW 14MW 15
MW 3
MW 24
MW 2
MW 4MW 10D
MW 25
MW 5MW 26
0 500 1000
Feet
20
Tuba City Open Dump
NNEPA H.Haven11/07/02
Ground Water Elevat ions
MW 20
MW 1
MW 19
Ceci l Begaye's Hand dug wel l
Baxter
4905
4895
48954894
4868MW 6
MW 8
486648564861
48404798
4856 4859
4903
4888
4827
4828 48374877
4902
4895
48984867
4863
4800
4900
Water Flow Di rect i on
4900
Moni tor ing Wel ls
NAV 5
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Note: Uranium concentration unit is in ppb
MW 16
224
MW 7
174MW29
37.1
NAV 7
19.5
MW 19 27.7
MW 1.88
NAV 2 41.9 ?
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Note: Uranium concentration unit is in ppb
????
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Note: Uranium concentration unit is in ppb
BARRIER NATURAL and to put a barrier
Proposed
MW Location
areas
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Upper Conglomerate
Lower Conglomerate
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Upper Conglomerate
Lower Conglomerate
Apparent Dip Direction
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UMTRA SITE
TUBA CITY, AZ
Water Flow Directions ???
Upper
Lower
What are the cleanup levels? Uranium? Others?
Proposed Locations?
Is there a lining under the site?
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Barrier
?
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Recommendations:
1) Immediate Barrier–Chemical ? Physical? Stop migration towards Hopi drinking water source.
2) Remediation of Lower Plume at MW 16 and NAV 2 and possible upgradient source
3) Drill upgradient of NAV 7 to ID source
4) Continue sampling of MWs
5) Independently Sample all MWs at UMTRA and water levels (survey elevations and locations
6) Investigate other funding sources
?
Lower Conglomerate