tuba city open dump - nuclear regulatory commission · tuba city open dump nnepa h.haven 11/07/02...
TRANSCRIPT
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
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 ?
Note: Uranium concentration unit is in ppb
????
Note: Uranium concentration unit is in ppb
BARRIER NATURAL and to put a barrier
Proposed
MW Location
areas
Upper Conglomerate
Lower Conglomerate
Upper Conglomerate
Lower Conglomerate
Apparent Dip Direction
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?
Barrier
?
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