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U it d N l C tiUnited Nuclear Corporation Superfund SiteSuperfund Site
Ground Water Education Session #2Ground Water Education Session #2May 11, 2014
Janet Brooks EPA Region 6Janet Brooks – EPA Region 6Earle Dixon – New Mexico Environment Department
1
Where has the UNC Site Tailing Cells impacted ground water?water?
SECTION 10
Z:\dalabases\6209_ GE_ CR\GISDATA\arcmap_doc\2013_annual_report\f06_seepage_extents.mxd; January 17, 2014
LEGEND
----- Section Boundary
•m•m• Property Boundary
i.:·.:·J Tailings Pond
- Groundwater with pH <= 4
Aerial photo taken on August 1, 1996.
750 1,500
eet
FIGURE 6
3,000
Extent of Seepage-Impacted Groundwater,
September and October 201 3
CHESTER E N GIN EERS
pH What are acids and bases?pH – What are acids and bases?Common Household Acids & Bases
Acids Bases
How do you tell an acid from a base?yAcidic
Neutral
Basic
Is your drinking water monitored?Is your drinking water monitored?
What is in your drinking water?What is in your drinking water?III(IIA1 llllll LI!IIIL Wl!ln • Ullll.'l' tiHilliilll! I)F li'IQIII!!ilfliiiL III!JIL'I'IIIIIIIIJDIIIUI
Total C<!lliform Yes f'!ll!5'l!l'll ~tGI' NCII'IDI!U Cdibm5 ill'e ~!hit-
lladwiil Allse!lt wilhirlltll!' - il'llm:l!!rl ~hi l!mri l'lll"'mm!fft illllll ill'e !~!Sed iiS
illll
~
ECcl No ~tilt 0 0 HiiiiNrl illllll illll'tlil ECilli is lladwiil All!5ad ll'liiS!L ~
l'lllilh hnill!l m al!!imill Millm!H!!i ill
ihi!; llm!iil!-- sh:ft~ ~ No 0.01»11 0.010 Emsilln flf llillillrill ~ alllanlltll!'
l'lll'dlfmm ri!skllf illl!dl'lll'dl l'lllilh
illlllll-r" -1>1!<
Bilrillim N!i~ 1:1<108 2.1:1 2.1:1 Emsilln llf llillil.r.ll Bllril.im ~hi risk flf
illl!d ml!l:ill l'l!llil!ll!lril!!i<
No 2.5 0 150 Emsilln clllillillrill
.tlid>l lliiii'ICI!I',
l\lilliilllia'J,
Total N!i~ 1U 0 3110 Emsilln clllillil.r.ll alllanllhi ~lllliluJ
f'Ff: IIICL LemJ; IIICL€3 mQIL per!ler --
What is the pH of your drinking water?What is the pH of your drinking water?Results for: '1"925" pH (non-WQP) MCL Value: pH
Sample Date Sample Location Detect '" Sample 10 Flag Analyte Result
Compliance Point ID: Compliance Point Name:
8/19/2013
5/21/2013
EP009 Mariano lake 416-0694
E POQ9 Mariano Lake114
1301062 <
13-0568 H 8.77
902
Comment Entered By cn'"f v•· QA Ooe
Detection Umit Method 1011
Yolmda
SfilEEN
11.Q712013
il>':n'20SM 4500-H ~13
Results for: '1"()4'2' Potassium MCL Value: mg/L or ~m
Sample Date Sample Location Detect
Sample 10 Flag Analyte Result malt ot ppm Comment
Entered By Fn>y o Detection Umit Method 1011
OAOate
Compliance PointiD: Compliance Point Name:
11/13/2012 E PQ05 Church Rock 8 12-01496 H 0.58 OV.<'Ut SM 31 118 0<2<f.nl3
Compliance Point ID: Compliance Point Name:
11/13/2012 EP006 Church RockE 12-01497 H 0.62 ' 41 '1 SM 31118 04II!>I!OIJ
Compliance PointiD: Compliance Point Name:
12/4/2012 EP007 Church Rock UNC 12-01580 H 0.6 Rhooda o.vs '- SM 31118 04II!>I!OI3
Results for: '1'o45' Selenium MCL Value: o.os mg/L or ~rn
Sample Date Sample Location Detect
Sample 10 Flag Analyte Result mg/L or ppm
Comment Entered By E""Y Dile
Detection Umit Method 1011 QA.O<ie
Compliance Point ID: EP005 Compliance Point Name: 16T-5388 Entry Point (Chuch Rock B)
11/13/2012 E P005 Church Rock 8 12-01496 < 0.005 0.005 '"'"'-"" 200.9 0<'2<2013
Compliance Point ID: EP006 Compliance Point Name: 16T-538E Entry Point (Chuch Rock E)
11/13/2012 E POQ6 Church Rock E 12-01497 < 0.005 Rhooda 0.005 0.-::5'2" 200.9 0411!>'2013
January 09, 2014 9:12AM Detection Flag Key: 1 is violation, Tis >112 MCL, His above detect limit, <is less than Detection Limit Page 9 of 12
What is in the ground water beneath the UNC Site?
di lid ( l h d• Radionuclides (Gross Alpha, Lead‐210, Radium 226 and 228, Thorium‐230, Uranium)
• Metals (Aluminum, Arsenic, Beryllium, Cadmium, Cobalt, Lead, Magnesium, , , , g ,Manganese, Molybdenum, Nickel, Selenium, Vanadium))
• Major Ions (Ammonia, Bicarbonate, Calcium, Chloride Nitrate Potassium Sodium TotalChloride, Nitrate, Potassium, Sodium, Total Dissolved Solids)
How is the water beneath UNC characterized?
• Maximum Contaminant Level (MCL) can effect your health.y
• Secondary Drinking Water Regulations for 15 “nuisance” contaminants Only effects tastenuisance contaminants. Only effects taste, color, odor. These are:
• Aluminum, Chloride, Copper, Fluoride, Iron, Manganese, pH, Silver, Sulfate, Total Dissolved g , p , , ,Solids, Zinc
9
What effect does the Secondary yDrinking Water have on me?
Al i l li d di t ti• Aluminum – color, , scaling and sedimentation• Chloride ‐ odor and taste• Copper ‐ odor and tasteCopper odor and taste• Fluoride – tooth discoloration and pitting• Iron ‐ odor and taste, color, scaling and sedimentation• Manganese ‐ odor and taste, color• pH ‐ odor and taste, , scaling and sedimentation
Sil ki di l i• Silver – skin discoloration• Sulfate ‐ odor and taste• Total Dissolved Solids ‐ odor and taste color scaling andTotal Dissolved Solids ‐ odor and taste, color, scaling and
sedimentation• Zinc ‐ odor and taste
10
S th t All i C t i tSouthwest Alluvium Contaminants
Action SWA
Exceedances / # of SWA Maximum Chemical Name Tailings Chemistry Unit Level
/Wells Detected Value
Chloride 608 ‐ 730 mg/l 250 1/15 364Manganese 100 ‐ 380 mg/l 2.6 6/15 6.09Nickel 3.5 mg/l 0.05 1/15 0.08
f ( ) / /Sulfate (SO4) 24,813 ‐ 144,900 mg/l 2125 13/15 5900Total Dissolved Solids (Lab) 38,462 ‐ 148,100 mg/l 4800 12/15 8730
During October 2013, the only hazardous substance found was Nickel in SBL‐During October 2013, the only hazardous substance found was Nickel in SBL01 which is a non‐seepage impacted background well located in Section 1.
11
Where are the Seepage Impacts in the Southwest Alluvium?Alluvium?
"' "' 0627
(617) 0 (2230]
, "'
, "'
; ;
;
SECTION 10
"' ,
"' "' ,
EPA25
Z:\databasesi6209_GE_CRIGISDATA\arcmap_docl2013_annual_ report\f08_swa_sulfate.mxd; January 4, 2014
.... --
Central Cell
Legend
o Southwest AlltNium Well
Approximate Extent of Saturated AlltNium
Approximate Extent of AlltNium
Bicarbonate lsoconoentration -- Contour in mg/L
Inferred Bicarbonate lsoconcentration - - - - Contour in mg/L
Bicarbonate Concentrations (mg/L)
- 1000 - 1500
- 1500 - 2000
>2000
Property Boundary
Section Boundary
-- Tailings Pond
Sulfate Below 2125 mgil
(2350) Bicarbonate result in mg/L
[3580] Sulfate result In mg/L
Notes: 1. Well names are displayed with black text. 2. Aerial photo taken on August 1, 1996.
0 250 500 1,000
Feet
FIGURE 8
Southwest Alluvium Bicarbonate lsoconcentration Map and Distribution of
Sulfate Below 2125 mg/L, September and October 2013
United Nuclear Corporation Church Rock Site, Church Rock, New Mexico
'~~CHESTER ~ENGINEERS
Zone 3 ContaminantsZone 3 ContaminantsZone 3
Chemical NameTailings
Chemistry Unit Action Level
Zone 3Exceedances / # of
WellsZone 3 Maximum Detected Value
Aluminum 1,167 ‐ 7,400 mg/l 5 7/23 566Beryllium not available mg/l 0.017 6/23 0.144
/ /Cadmium 0.013 ‐ 0.24 mg/l 0.01 2/23 0.036Cobalt 5.5 mg/l 0.05 16/23 1.89Lead 0.6 ‐ 15.9 mg/l 0.05 1/23 0.074Lead‐210 4,200 pci/l 1 7/23 3.4Manganese 100 380 mg/l 2 6 16/23 51 1Manganese 100 ‐ 380 mg/l 2.6 16/23 51.1Nickel 3.5 mg/l 0.05 16/23 1.9Radium 226 & 228 8000 pci/l 5 18/23 46Sulfate (SO4) 24,813 ‐ 144,900 mg/l 2125 17/23 8630Thorium‐230 13 ‐ 277,733 pci/l 5 3/23 690pTotal Dissolved Solids (Lab) 38,462 ‐ 148,100 mg/l 4800 10/23 11900Total Trihalomethanes (includes Chloroform)
not available ug/l 80 1/23 88.8
Uranium 7.6 ‐ 54.5 mg/l 0.3 3/23 0.989di /l /Vanadium 180 mg/l 0.1 1/23 1.8
Exceedances of some of the Site standards in some Site wells represent background water quality and are not the cause of the UNC tailings seepage. Example: From 1989
13
through 1997, Well 411 showed long‐term background exceedances in combined radium, cobalt, molybdenum, nickel, and sulfate.
Where are the Seepage Impacts in Zone 3?
North Cell
Approximate Extent of Seepag Impacts, 4th Quarter 2013
January 6, 2014
f Legend
••••m• Property Boundary
··-····- Zone 3 Target Remedial Action Area
-- Section Boundary
-- Cell Boundary
Approximate Area Impacted by Tailings Seepage
Wetl Type
• Monitoring
~ Northernmost Pumping Wells
0 Northernmost Pumping Wells (Off)
o Dry Monitoring
Stage I Extraction
Stage tl Extraction
s Other Extraction Wetls
" Plume Boundary
Northeast Pump-Back
Piezometer
Approximate Eastern Bouncary -·-·- of Zero Saturation
- - - pH contour
Notes: 1. Wetl names are displayed with t>ack text. 2. Values for field measured pH are shown with
purple text and enclosed in parentheses. 3. PB-02 not pumping at t1me of October 2013
sampling event. 4. Aerial photo taken on August 1, 1996.
0 200 400 800
Feet
FIGURE 35
Zone 3 Approximate Extent of Seepage Impacts, September and October 2013
United Nuclear Corporation Church Rock Site, Church Rock, New Mexico
~~CHESTER 'W- E N G INE E R S
Zone 1 Contaminants
Chemical Name Tailings Chemistry Unit Action Level
Zone 1Exceedances / # of
WellsZone 1 Maximum Detected Value
Chloride 608 ‐ 730 mg/l 250 3/10 393Cobalt 5 5 mg/l 0 05 2/10 0 15Cobalt 5.5 mg/l 0.05 2/10 0.15Manganese 100 ‐ 380 mg/l 2.6 4/10 8.12Nickel 3.5 mg/l 0.05 5/10 0.27Radium 226 & 228 8000 pci/l 5 4/10 11.2Sulfate (SO4) 24,813 ‐ 144,900 mg/l 2125 8/10 7340Total Dissolved Solids (Lab) 38,462 ‐ 148,100 mg/l 4800 6/10 11600Total Trihalomethanes (includes Chloroform)
not available ug/l 80 2/10 416
During October 2013, only the following hazardous constituent exceeded the Site standards outside the property boundary in Section 1:• Nickel Well EPA 5 had 0 06 mg/l• Nickel – Well EPA 5 had 0.06 mg/l
15
Where are the Seepage Impacts in Zone 1?
0505A s
0502A s
Z:\databases\6209_GE_CR\GISDATA\arcmap_doc\2013_annu al_reporl\f48_z1_seepage.mxd; January 8. 2014
0 Water Quality and Water Level Monitoring
$ Water Level Monitoring
e Decomissioned East Pump Back
l:J. Revised East Pump Back (Inactive)
Property Boundary
Approximate Extent of Zone 1 Seepage Impact
Approximate Extent of Zone 1 pH Less Than 4.0
Chloride result in mg/L
(6.03) Field-measured pH in SU
Notes: 1. Seepage impacts delineated by
chloride detections greater than 50 mg/L. Aerial photo taken on August 1, 1996.
250 500 1,000
Feet
FIGURE 48
Zone 1 Extent of Seepage Impacts, October 2013
United Nucle3r Corporation Church Rock Site, Church Rock, New Mexico
~~CHESTER ~ENGINEERS