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                                To Our Readers...
       The Environmental Protection Agency, Region 6, has made every effort to ensure the
accuracy and timeliness of these Superfund Site Status Summaries. However, if you feel that
we have made an error or you have information that you feel would be beneficial to
improving these public information documents, we want to hear from you! Please contact us
at 1-800-533-3508 (toll free) with your comments and suggestions.
                                   Thank You!

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AT&SF
(ALBUQUER
NEW  MEXICO
EPA ID# NMD9806228I
     EPA REGION 6
CONGRESSIONAL DISTRICT 01
        Bemalillo County
        South Valley Area
                                                           Other Names:
                                                         ATSF Tie Treater
Site Description
Location:     • 3300 Second Street SW in the South Valley area, Albuquerque, Bernalillo
            County, New Mexico.


Population:   «-EPA has identified 15 City of Albuquerque, 3 Kirtland Air Force Base, and 148
            private wells within 4 miles of the site that serve an estimated 43,500 people.


Setting:      • The site is an abandoned wood-preserving facility in a commercial area of an
            Albuquerque suburb (South Valley).
            • Washdown waters, spills and leakage were disposed in an unlined
            impoundment
            • The impoundment and a sump cover approximately 3.4 acres.
Hydrology:   • Depth to ground water is approximately 20 feet
Wastes and Volumes  —	

• Sludge from the impoundment contains hazardous substances including arsenic, barium, lead
and creosote constituents (3,4-benzofluoranthene, benzo(a)pyrene, and naphthalene)
• Soil in the "Sump" area is contaminated with barium, acenaphthylene, anthracene,
fluoranthene, and benzo(a)pyrene.
• Ground water from onsite monitoring wells contains fluorene, 2-methylnaphthalene,
naphthalene, phenanthrene, pyrene, acenaphthene, anthracene, benzene, dibenzofuran,
ethylbenzene, fluoranthene, and xylenes.
Volumes:
      • The waste water (surface) impoundment (identified as the shaded area in the site
      diagram) is approximately 104,004 square feet in area.
      • The waste water sump is approximately 44,100 square feet in area.
                                                                  December 1, 1995

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Site Assessment and  Ranking
                             NFL LISTING
                             -,  Sfte HRS ScoreOS&QO
                                       Date? i
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 Record of Decision
                           No Record of Decision has feesn signed
Community  Involvement 	

• Community Involvement Plan: Developed 5/94

• Open houses and workshops:  1/20/93, 5/13/94, 3/1/95, 8/6/95

• Citizens on site mailing list:  65

• Constituency Interest:
       - Medium  citizen and elected official interest, organized community groups.
       - This site  is near South Valley Superfund site.

• Site Repository: Albuquerque Public Library, 501 Copper Ave. N.W., Albuquerque, New
Mexico 87102  ...
Technical Assistance Grant   —	—	

• Availability Notice:  1/93,11/94,1/95
• Letters of Intent Received: 1/95
• Final Application Received:  9/95
• Grant Award: Pending

• Current Status: San Jose Community Awareness Council submitted Letter Of Intent and draft
application (6/95); EPA Comments were returned 7/95, and SJCAC's response was received 9/95.
Fiscal and Program  Management	

• Remedial Project Manager (EPA): Monica Smith, 214/665-6780, Mail Sta. 6SF-LN
• State Contact: Maura Harming
• Community Involvement Coord. (EPA): Olivia Rodriguez Balandrln, 214/665-6584, Mail Sta.
6SF-P
• Attorney (EPA): James E. Costello, 214/665-6780, Mail Sta. 6SF-DL
• State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-AT

Cost Recovery: PRP Lead (Enforcement)
• PRPs Identified:  Atchison, Topeka and Santa Fe Railroad
• Viable PRP:  Same
AT&SF (ALBUQUERQUE)
December 1, 1995

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Present Status and  Issues
•  Region 6,with the assistance of the San Jose Community Awareness Council and the
International City Management Association, conducted a three day Superfund Summit,
Environmental Justice Forum and a Community Economic Partnership Seminar on August 9-11,
1995 which included a site status workshop.

•  The NMED will act as EPA's oversight contractor for the Remedial Investigation/Feasibility
Study (RJ/FS) and Remedial Design (RD) phases.

• EPA, NMED, and AT & SF are evaluating alternatives for the removal of the sludges and
soils throughout the site.
Cleanup Measurements
• Once a remedy is chosen (Record of Decision), the remediation of the ATSF (Albuquerque)
Superfund site will reduce environmental risk for over 43,000 people within a 4 mile radius.

• The health and environment of over 31,000 people living near the site will be protected.

• The drinking water source, the Santa Fe Aquifer, is contaminated with creosote constituents.
The creosote contaminated soils and sludges are a source of ground water contamination. If the
site inclusive of the contaminated soils, sludges and ground water are not remediated. The
groundwater would continue to be contaminated.
December 1,1935
AT&SF (ALBUQUERQUE)

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AT&SF
 (CLOVIS)
NEW MEXICO
EPA ID# NMD043158591
    EPA REGION 6
ONORESS1ONAL DISTRICT 03
        Curry County
    outh of the AT&SF Railway
    switching yard in Clovis
                                                       Other Name*:
                                                    lovis SKe, ATSF Clovis,
                                                       Santa Fe Lake
Site Description
Location:     • Approximately 1 mile South of the AT&SF Railway switching yard, Clovis,
            Curry County, New Mexico

Population:   • 31,000 people live within a three-mile radius of the site.

Setting:      • Nearest residence is 2,000 ft.
            • Nearest drinking water well is 1,200 ft

Hydrology:    • The lake is currently fenced off from public access.
            • The site is over the Ogallala Aquifer.
Wastes and Volumes
• Principle Pollutants: Boron, Fluoride, Chloride, Petroleum Hydrocarbons.

Volumes:    • Water - 51,500 cubic yards (yd3)
           • Soil - 25,500 yd3
           • Sediment - 48,200 yd3
Site Assessment and Ranking
                          NPL LISTING HISTORY
                             ,0iieHRS Score; 33,02
                             Proposed Datet 16/23/81 ,
                               Float Date; 9/08/63
                          * *   NPL Update No.*
                                                             December 1, 1995

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Site Map and  Diagram
                                                  Clovis
                                                Switchyard
The Remediation Process  	

Slta History:

• Railroad has conducted refueling and hopper car washing at railroad yard since the 1950's.
• Mid-1970's onsite industrial water wells shut down due to contamination.
• An Administrative Order on Consent was signed with ATSF for Remedial Investigation in
8/83.
• Public Meeting on RI/FS and Proposed Plan held 8/23/88.
• Remedial Design began 12/16/88.
• Remedial Design is complete for Phase I.
• Construction start was approved August 7,1989.

Health Considerations:

• Site is located over Ogallala Aquifer which is used as a source of drinking water.

Record of Decision  	——	
                                                  , 1988
J
 December 1,1995
     AT&SF (CLOVIS)

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• The remedy has three basic parts; lake water, lake sediment, and soil unde- the sediment.
• No ground water remediation is proposed, but monitoring will continue.

Laka Water

• Run-on controls will be instituted to stop run-on into the lake.
• The lake water will be evaporated with a spray system within the existing lake bed.

Lake Sediment:

• The sediment/sludges will undergo biodegradation within the lake bed. Subsequently, the
sediment/sludges will be excavated and taken to a treatment area within the site where additional
biodegradation will take place.  All sediment and all soil that fail to meet the cleanup criteria will
be taken to an onsite storage facility and capped.

Laka Soil:

• Contaminated soil (soil with total petroleum hydrocarbon (TPH) concentrations above 1,000
parts per million (ppm) will be bioremediated in place. The TPH concentration must either fall
below 1,000 ppm or stabilize above 1,000 ppm. Once the concentration meets either criteria, it
may be left in place (if the concentration fell below 1,000)  or will be excavated and taken to the
treatment area where it will be capped, along with the treated sediment.
  Other Remedies Considered

1. Spray Irrigation (lake water)
2. In-Situ Fixation
3. Cap in Place

4. Landfill
           Reason Not Chosen
Increase in contaminated area
Low long-term effectiveness
No reduction in toxicity;
mobility or volume
No reduction in toxicity;
mobility or volume
Community Involvement	

• Community Involvement Plan: Developed 1/88, currently under revision.
• Open houses and workshops: 1/91, 4/91
• Original Proposed Plan Fact Sheet and Public Meeting:  8/88
• Original ROD Fact Sheet:   10/88
• Milestone Fact Sheets:  9/86, 8/89, 4/91, 6/92

• Citizens on site mailing list: 124
• Constituency Interest:  Low interest, no organized groups identified.

• Site Repository:  Clovis-Carver Public Library, Fourth & Mitchell Streets, Clovis, MM 88108

Technical Assistance Grant	
• Availability Notice:  1/89
• Letters of Intent Received: None
• Final Application Received: None
AT&SF (CLOVIS)
                          December 1. 1995

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• Grant Award: N/A
* Current Status: No apparent citizen interest in applying for grant.
Fiscal and Program Management
• Remedial Project Manager (EPA):  Shawn Ghose, 214/665-6782, Mail Sta. 6SF-LL
• State Contact: Stuart Kent
• Community Involvement Coord. (EPA): Olivia R. Balandrdn, 214/665-6584, Mail Sta. 6SF-P
• Attorney (EPA):  Paul Wendel, 214/665-2136, Mail Sta. 6SF-DL
• State Coordinator (EPA):  Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
• Prime Contractor:  Fluor Daniel (EPA Oversight)

Cost Recovery: PRP Lead (Enforcement)
• PRPs Identified: Atchison, Topeka and Santa Fe Railroad
• Viable PRP:  Same
• Negotiated Administrative  Order on Consent.
Present Status and Issues  	—

• After adding the AT&SF (Clovis) site to the National Priorities List (NPL), the EPA assessed
site conditions and determined that the site did not pose an immediate threat to nearby residents
and the environment. Construction of a dike and ditch system to prevent migration of
contaminants from the site and installation of a fence have reduced the potential of contact with
contaminants while soil and sediment cleanup occurs at the site.

• Recent information may be indicating that the direction of ground water flow may be
changing. This may be due to water being discharged by the switchyard to the north.
Cleanup Measurements
• The AT&SF (Clovis) cleanup will effectively treat almost 125,000 cubic yards of contaminated
soil, sediment and water.  The cleanup criteria include a primary goal of treating to less than
1,000 ppm Total Petroleum Hydrocarbons and a secondary goal of stabilized soil.
• The health and environment of over 31,000 people living near the site will be protected.
• Approximately 32,000 cubic yards of material has been treated to date.
December 1,1995
AT&SF (CLOVIS)

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CAL WEST
METALS
(USSBA)
NEW MEXICO
EPA ID# NMD097960272
EPA REGION 6
SESSIONAL DISTRICT 02
   Socorro County
1/2 mile north of Lemitar
Site Description  	—	—.	

Location:    • 1/2 mile north of Lemitar in Socorro County.

Population:   • Approximately 1,000 people get drinking water from public and private wells
           within a 3-mile radius.
           • Six hundred acres of food and forage crops are irrigated with surface water
           within 3 miles downstream of the site.

Setting:      • the site encompasses approximately 43.8 acres. The facility processed
           approximately 20,000 automobile batteries in a 13-acre area to recover lead.

Hydrology:   • Surface soils consist of gravelly sandy loams
           • Ground water at the site is encountered at a depth of 70 to 95 feet below
           ground surface.
Wastes and Volumes
      PRINCIPAL POLLUTANTS: Lead - 54,500 parts per million (ppm) to 424,000 ppm
      VOLUME: 45,000 cubic yards of contaminated soil drainage sediments, pond sediments,
      and broken battery materials.
Site Assessment and Ranking
                          NPL LISTING HISTORY
                              Site HRS Score: 5&S7
                               Final Date:
                                        No,?
                                                             December 1, 1995

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Site Map and Diagram
     Fencellne
         Battery Waste Pile
         Pre-Fab Metal BIdg,
            ©arage/Office
                                                       Lined
                                                   Evaporation
                                                        Pond
                                                 Well Pump
                                                     BIdg.
                                                   Shed/Cotton
                                                      Gin BIdg.
                                                        Well Pump
                                                            BIdg.
                                     Cal West Metals
The Remediation Process 	

Site History.

• The facility operated as a battery recycling plant and secondary lead smelter between 1979 and
1981. Raw materials recovery research and development continued between 1982 and 1984.
• On, October 23,1985, the Small Business Administration (SBA) foreclosed on and took
ownership of the facility.
• The New Mexico Environment Department (NMED) and EPA conducted preliminary site
inspections from 1984 through 1989.
• NMED prepared a Superfund Hazard Ranking System package in January 1987, and the site
was formally added to the Superfund National Priorities List on March 31,1989.
• EPA began the Remedial Investigation/Feasibility Study (RI/FS) in August 1990. EPA
conducted the RI/FS with in-house personnel and assistance from the NMED.
• The RI/FS Reports and the Proposed Plan of action were released to the public in July 1992.
• The Proposed Plan public comment period was held July 20,1992, through August 18,1992.
                                                               December 1. 1995

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 • On September 29,1992, EPA signed the Record of Decision (ROD).
 • The Remedial Action contract was awarded on February 25,1994, and construction was
 completed by the end of April 1995.

 Health Considerations:

 • Ingestion; Potential source of groundwater contamination.
Record of Decision
                                 Signed: September 29» 1992
• The major components of the selected remedy include:

Ground Water

• Monitoring the site ground water with existing wells down gradient of the disposal site.

Soil Treatment: ~~

• Excavation and treatment, by stabilization/ solidification, of approximately 45,000 cubic yards
 of contaminated soils, sediments,  and source waste materials.
• Disposal of the treated contaminated material in an onsite excavation.
  Other Remedies Considered

1. No Action
2. Off-sKe Disposal
          Reason Not Chosen
No Risk Reduction
Not Cost Effective
Community Involvement  	—	

• Community Involvement Plan: Developed 4/91
• Open houses and workshops: 8/91, and 6/92, 4/93, 4/94
• Original Proposed Plan Fact Sheet and Public Meeting: 7/92.
• Original ROD Fact Sheet:   11/92
• Milestone Fact Sheets:  2/91, 8/91
• Citizens on site mailing list: 30
• Constituency Interest: Low

• Site Repository: Socorro Public Library, 404 Park St., SW, Socorro, NM; 505/835-1114
Technical Assistance Grant

• Availability Notice: 1991
• Letters of Intent Received: None
CAL WEST METALS (USSBA)
                         December 1. 1995

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• Final Application Received: None
* Grant Award: N/A
• Current Status: No apparent citizen interest in grant.
Fiscal and Program Management
  Remedial Project Manager (EPA):  Shawn Ghose, 214/665-6782, Mail Sta. 6SF-LN
  State Contact: Jim McDonald
  Community Involvement Coord. (EPA):  Olivia R. Balandran, 214/665-6584,  Mail Sta. 6SF-P
  Attorney (EPA): John Dugdale, 214/665-8027, Mail Sta. 6SF-DL
  State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-AT
  Prime Contractor:  Eagle Construction & Environmental, Eastland, Texas

Cost Recovery: PRP Lead (Enforcement)
• Pursue Cost Recovery
• PRPs Identified:

      • Cal West Metals
      • Jim and Albert LaPoint
      • Small. ^Business Administration

• Viable PRP:
      • Jim and Albert Lapoint
Present Status and Issues
• Following listing of the Cal West Metals (USSBA) site on the NPL, the EPA assessed the site
conditions and determined that it presently poses no immediate threat to public health or the
environment while further studies into cleanup alternatives were being conducted.

• The Remedial Action (RA) contract was awarded on February 25,1994.

• An Open House was hosted by EPA and NMED in April 1994 to discuss the Remedial Action
with interested citizens.

• Preliminary Close-Out Report was completed on September 29,1995.
Cleanup Measurements
• The water supply from wells for 1,000 citizens will be protected.

4 By stabilizing/solidifying the contaminated soil and placing the solidified material under a
concrete cap, EPA has made sure that the soil would not pose a threat to the surrounding either
either being transported by wind or leached into groundwater. The site can be returned to
beneficial use following sampling of down gradient monitor wells.
December 1,1995
CAL WEST METALS SITE (USSBA)


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CiMARRON
CORP.
NEW  MEXICO
EPA ID# NMD980749378
                                                       EPA REGION 6
                                                  CONGRESSIONAL DISTRICT 02
                                                           Lincoln County
                                                             Carrizozo
Site Description

Location:
            • The first operable unit is on Highway 389 in Carrizozo.
            • The second Operable Unit ("Sierra Blanca") is 3/4 mile south of the first
            Operable Unit.

Population:   • Approximately 1,000 people obtain drinking water from 29 municipal wells
            within 3 miles of the site.

Setting:      • The nearest municipal well is about 2 miles away from the Cimarron Mining
            Corp. area and 1/2 mUe from the Sierra Blanca mill area.
            • Wells also are used to irrigate food crops.
            • Operable Unit 1 (OU1)  location covers approximately 10 acres, and operated as
            a mill extracting gold with  cyanide.
            • Operable Unit 2 (OU2)  covers about 7 acres, and operated as a mill that
            recovered precious metals  using a flotation process.

Hydrology:   The site is underlain by quaternary alluvium and bolson deposits, in turn,
            underlain by Cretaceous Mesa Verde and Mancos Shale Formations.
Wastes and Volumes
• The principal pollutants at the site include cyanide in ground water up to 4,330 parts per
billion (ppb) at Operable Unit 1, and lead in soils and sediments up to 18,000 parts per million
(ppm) at Operable Unit 2.
• Waste volumes are approximately 500,000 gallons of contaminated shallow ground water at
OU1, and about 1,000 cubic yards of contaminated soils and sediments at OU2.

Site  Assessment and Ranking	
                             NPL LISTING HISTORY
                                 $]te tfR$ Score: 3&Q3
                              •.- Proposed Date; 6/24/88
                                 final Date; 10/04/6$  ;
                              \    NPL Update; No* 7
                                                                   December 6, 1995

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Site Kiap and  Diagram
                                 	Ml
                             Carrlzozo
                             Municipal
                              Schools
                  CImarron Mining
The Remediation  Process	

Site History:

• The site operated from 1979 to 1982 using cyanide salts and metal strippers to extract gold
from ore brought to the site.
• The New Mexico Environment Department (NMED) sent a certified Notice of Violation letter
to Cimarron Mining Corp. on 6/22/82 for a non-permitted discharge.
• Cimarron filed for bankruptcy in 7/83.
• During an NMED-lead site inspection in May and June 1984, cyanide and heavy metals were
detected in ground water, soils and mill tailings.
• In August 1987, EPA Emergency Response constructed a fence *nd posted warning signs to
alert nearby community of contaminated site conditions.
• EPA began the remedial investigation and feasibility study (RI/FS) in 3/89.
• The "Sierra Blanca" property, a former processing area related to site operation, was
incorporated into the site response actions in 1/90 as OTJ2.
• July 1991  - May 1992, equipment was decontaminated and high hazard material was contained
in mixing vats, tanks, and troughs. The contained waste was then consolidated and staged,
overpacked onsite, then disposed offsite.

Homlth Considerations:

 • Potential  for deeper drinking water aquifer contamination at OU1, and for ingestion of lead-
contaminated soils at OU2.
 December 6,1995
                                                                  CIMARRON MINING CORP.

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Record  of Decision
                                      September'21,1990 (OU1)
                                Signed: September e, 199t pU2)
Ground Water (OU1):
• The Record of Decision (ROD) for the OU1 called for extraction of shallow ground water and
discharge to the publicly owned treatment works (POTW).

Soil Treatment (OU2):

• This ROD called for solidification and stabilization of contaminated soils and waste piles
exceeding 500 ppm lead, with onsite disposal.
     Other Remedies Considered
           Reason Not Chosen
1. No Action
2. Institutional Controls
3. Pump and evaporate ground water
4. Pump, treat and recharge ground water
                               -GROUND WATER (OU1)-
Not Protective
No treatment; not protective
Not cost-effective In the long term
Not cost-effective In the long term
1. No Action
2. Institutional Controls
3. Cement Solidiflcatlon/Off-slte
Municipal Landfill
4. Off-site Municipal/Hazardous
Landfill

Community Involvement
                               -GROUND WATER (OU2)-
Not protective
No treatment, not protective
Not cost-effective In the long term

Not cost-effective In the long term
• Community Involvement Plan: Developed  4/89, revised 1991.
• Open houses and workshops:  9/88, 5/89,3/90, 7/90, numerous other informal meetings.
• Original Proposed Plan Fact Sheet and Public Meeting: 7/30/90 (OU1), 6/17/91 (OU2).
• Original ROD Fact Sheet:  10/90 (OU1), 9/91 (OU2).
• Milestone Fact Sheets: 5/89, 3/90.
• Citizens on site mailing list:  83
• Constituency Interest:
       - Medium interest by the community.
       - Most citizens and officials do not feel any significant health threats exist at the site.
• Site Repository: Carrizozo City Hall, 100 Fifth Street, Carrizozo, NM 88301
CIMARRON MINING CORP.
                         December 6, 1995

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Technical Assistance Grant
• Availability Notice:  1/89
• Letters of Intent Received: None
• Final Application Received: None
• Grant Award: N/A
• Current Status: No apparent interest by citizens in applying for the grant.
Fiscal and Program Management
• Remedial Project Manager:  Shawn Ghose (EPA) 214-665-6782, Mail Code:  6SF-LN
• State Contact: John Pfeil (NMED)
• Community Involvement Coordinator: Olivia Balandran (EPA) 214-665-6584, Mail Code: 6SF-P
• Attorney: Keith Smith (EPA) 214-665-2157, Mail Code: 6SF-DL
• State Coordinator: Mark Satterwhite (EPA) 214-665-8505, Mail Code:  6SF-LN
• Prime Contractor:  Camp, Dresser & McKee

Cost Recovery: EPA (Fund) Lead

• PRPs Identified: 2 (for OU1)
• Viable PRP: 'None

• In 2/89, Potentially Responsible Parties declined to respond to Special Notice Letters.
• EPA submitted waiver of special notice procedures for remedial design and remedial action
(RD/RA) on 1/3/91.
• Trust fund to conduct RD/RA for OU1 and OU2.
Present Status and Issues	

• Constructing a fence to limit access, extracting and treating groundwater, and cleaning up
contaminated soils have reduced the threats to the public and the environment at the Cimarron
Mining Corp. site.

• The RA started at the Cimarron OU on 8-13-91; all work is completed. The site wells have
been installed and water is being pumped and treated.

• The Sierra Blanca OU RA was initiated on 12-20-91; all required site stabilization has been
completed.
 Cleanup Measurements
 • Drinking water for 1,000 residents drawn from public and private wells within three miles of the
 site will be protected from site contaminants.
 • 500,000 gallons of shallow contaminated ground water, and 1,000 cubic yards of contaminated
 soils and sediments will be remediated.
 December 6,1995
                                                               CIMARRON MINING CORP.

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CLEVELAND
NEW MEXICO
EPA ID#NMD98115593
     EPA REGION 6
CONGRESSIONAL DISTRICT 02
         Grant County
Site Description	

Location:     • 5 miles northeast of Silver City

Population:   • Approximately 1,200 area residents, mainly along Little Walnut Creek, draw
            drinking water from private wells within 3 miles of the site.

Setting:      • 100 yards south of the Continental Divide at the headwaters of Little Walnut
            Creek.
            • Two Forest Service roads converge onsite.
            • Creek downstream waters and onsite reservoir are used for recreational
            purposes.
            • The site is an abandoned lead, zinc, and copper mine and mill covering about 4
            acres near mine and about 10 acres of the streambed.
            • Tailings were moved from the mill and deposited directly to the sloping side of
            a small valley.
            • The piles are uncovered, unstabilized and unlined.

Hydrology:   • Runoff from the facility has acidified recreational Little Walnut Creek and has
            contaminated it with metals.


Wastes and Volumes  	
1. Principle pollutants: Lead, zinc, arsenic, cadmium and beryllium

2. Volume: Estimated 100,000 cubic yards in about 9 piles and in the streambed.

Site Assessment and Ranking 	
                            NPL LISTING HISTORY
                                Site HRS Scorn: 40,37
                                Proposed Date; 6/34/88
                                 Final Date: 3/31/89,,
                                 MFL Update; No. 7  ,
                                                                 December 6, 1995

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Site Map and Diagram
                 Cleveland Mill Site
                                                    TRUTH OR
                                                    CONSEQUENCES
                                                       LAS CRUCES
                      Silver City, New Mexico
The Remediation Process	•

SRe History:

• From 1910 to 1916,150,000 tons of ore were processed at Cleveland Mill.
• Tailings were disposed of outside of the mill building at the headwaters of a creek.
• Mill closed and moved in 1919.
• From 1919 through the 1950s, the site was leased to a series of people.
• Limited information is available on site  activities from 1950 through the present (assumed
abandoned).
• In 1985, NMED conducted a Site Inspection (SI) which indicated that runoff from the facility
into Little Walnut Creek contained elevated concentrations of metals.
• Special Notice Letters were sent to the PRPs on 12/27/89.
• Good faith offers from the PRPs were not received during 60 day moratorium; therefore, EPA
performed RI/FS using funds from the trust.
• The RI/FS reports and the Proposed Plan were released to the public in April 1993. An
extended public comment period for the Proposed Plan was held from April 9,1993, through
June 9,1993.
• The ROD issued September 22,1993 calls for excavation, offeite reprocessing and recycling,
and site revegetation.
• The Consent Decree between EPA and three PRPs was entered on June 12,1995.
 December 6,1995
                                                                        CLEVELAND MILL

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Health Considerations:

• Direct contact and ingestion threat; potential threat to groundwater.
Other Environmental Risks:

• Acidic runoff from facility into Little Walnut Creek potentially transports heavy metals (Pb,
Be, Cd, Zn, Cu, As) into residential wells.
Record  of Decision
                                  Sfgfnetft September 22,1995
                            J
Offsite reprocessing, recycling and disposal of residuals selected.

Remedy Selected: Offsite reprocessing, recycling and disposal

       Other Remedies Considered                 Reason Not Chosen
1. No Action
2. Onsite stabilization/disposal
3. Onsite disposal/capping
4. Onsite stabilization/ offsite disposal
       Not Protective
Potential for future contaminant leaching
       (Same)
Cost
Community Involvement
• Community Involvement Plan: Developed 3/91
• Open houses and workshops: 8/91, 4/93, 7/94, 9/94, 11/94,1/95
• Proposed Plan Fact Sheet and Public Meeting: 4/8/93
• Milestone Fact Sheets:  4/93,1/94, 3/94
• Open House/Citizen Advisory Committee Meetings, 5/94, 7/94, 9/94,11/94, 2/95
• Citizens on site mailing list: 200
• Constituency Interest:
       - Primary community concerns are with other active mining operations, transportation
       routes of mining materials.
• Community Working Group established 11/94.
• Site Repository:  Silver City Library; NMED Office, Santa Fe, NM; EPA Office, Dallas, TX
Technical Assistance Grant
• Availability Notice:  None
• Letters of Intent Received:  None
• Grant Award: N/A
• Current Status:  No community response from information provided at meetings.
CLEVELAND MILL
                                  February 1, 1995

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Fiscal and Program Management
• Remedial Project Manager (EPA):  Kathleen Aisling, 214/665-8509, Mail Sta. 6SF-LN
• State Contact: Bob King
• Community Involvement Coord. (EPA): Olivia R. Balandran, 214/665-6584, Mail Sta. 6SF-P
• Attorney (EPA): Jim CosteUo, 214/665-8045, Mail Sta. 6SF-DL
• State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
• Prime Contractor: RI/FS - E&E; RD/RA - PRP lead, NMED oversight

Coat Recovery:  EPA Lead

• PRPs Identified: 3
• Viable PRPs:
      • Mining Remedial Recovery Company, a subsidiary of Sharon Steel Corporation is now
      the current owner of the Cleveland Mill site.
      • Bayard Mining Corporation - past owner through mergers, owner of part of the site
      • Viacom International, formerly Paramount Communications, past  owner through
      mergers.
Present Status and Issues
• Currently, the PRPs are performing Remedial Design activities in compliance with the Consent
Decree.
Cleanup Measurements
• The site is being addressed in a single long-term remedial phase focusing on contamination at
the entire site.

•If the site were not cleaned-up, residential development in the area and along 5 miles of
Little Walnut Creek would be precluded.
December 6, 1995
                                                                     CLEVELAND MILL

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HOMESTAKE
COMPANY
NEW  MEXICO
EPA ID# NMD007860935
     EPA REGION 6
CONGRESSIONAL DISTRICT 02
         Cibola County
         Other Names:
   led Nuclear Homestake Partners
        UNC/Homestake
Site Description	

Location:     • 5.5 miles north of Village of Milan in northwest New Mexico.

Population:    • Approximately 200 people live within a mile of the tailings piles.

Setting:       • Nearest residence is 3,000 feet away.
             • Nearest drinking water well is 3,000 feet away.
             •^Threatened population in four subdivisions located 1/2 to two miles from
             tailings piles.
             • Active tailings pile - 200 acres, 95-100 feet high 21 million tons.
             • Inoperative tailings pile - 45 acres, 25 feet high 1.225 million tons.
             • Uranium mill facility is  still operating.

Hydrology:    • Tailings located on alluvium, overlying Chinle and San Andreas aquifers.
             • Alluvium used as domestic water supply; deeper San Andreas is also an aquifer.
             • Extensive injection/withdrawal system has altered shallow ground water flows
             and largely flushed alluvial and upper Chinle contamination under the State of
             New Mexico's Ground Water Discharge Plan (DP-200).
Wastes and Volumes
• Principle Pollutants:
      - Alkaline mill tailings
      - Radium-226; 60-100 picocuries/liter in tailings (soil)
      - Selenium:  1,200 parts per billion (ppb) (water)
      - Uranium:  720 ppb (water)
      - Radon:  0.03 Working Level (WL) (air)

• Volume:
      - Tailings piles - 22.225 million tons.
                                                                    December 6, 1995

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Site Assessment and Ranking
                           NPL LISTING HISTORY
                               Sit© HRS Scores 36.21
                              proposed Dates 12/30/82
                                Final Date: 0/08/85
                              -: NPL Update: Original
Site Map and Diagram
                                                      Homestake
                                                      Mining Co.
                              Homestake
                               Mining Co.
 The Remediation Process  	

 Site History:

 • Mill opened in 1958.
 • Ground water contamination observed as early as 1961.
 • NMEED approved Homestake's Ground Water Discharge Plan (DP-200) in 1981 covering
 shallow aquifer restoration activities at the site.
 • Homestake and EPA signed Consent Decree for Alternate Water Supply 11/83.
 December 6,1995
                                                      HOMESTAKE MINING COMPANY

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• NM radon study released for homes near mi". 08/83.
• Alternate Water Supply completed by Homestake 04/85.
• Homestake signed an Administrative Order on Consent 6/30/87 despite their position that any
emissions of radon from Homestake's facility are "federally permitted releases" and that they
should not be liable for any study or response costs in connection with the Radon RI/FS.
• EPA signed a Record of Decision (ROD) for the Radon Operable Unit on September 27,
1989. The ROD called for No Action.
Health Considerations:

• Several hundred people depended upon the shallow aquifer as a water supply; alternate water
was provided in 1985, by Homestake under Consent Order with EPA.

Other Environmental Risks:

• Seepage from two large tailings ponds has contaminated the shallow aquifer and portions of
the Upper Chinle aquifers.  Possible emissions of radon from the tailings piles on Homestake's
property may have increased the concentration levels of radon in adjacent  subdivisions.
Record of Decision
                     Signed; Consent Decree fit November 1983 (Ground Water)
                                 September £7,1960 (Radon)

 > Remedy: Provide water system to affected residents.
             No action necessary to address radon.

 Other Remedies Considered
Reason Not Chosen
Community Involvement
• Community Involvement Plan:  Developed 09/87.
• Open houses and workshops:   10/86,10/87.
• Original Proposed Plan Fact Sheet and Public Meeting: 07/89.
• Original ROD Fact Sheet: 10/89.
• Milestone Fact Sheets:  No Further Action.
• Citizens on site mailing list: 109
• Constituency Interest: Community concern for major employer is high. PRPs are keeping in
touch with residents on a regular  basis.
• Site Repository: New Mexico State University, Grants Library,  1500 Third Street, Grants, NM
87020
Technical Assistance Grant

• Availability Notice: 01/89
• Letters of Intent Received:  None
• Grant Award: N/A
HOMESTAKE MINING COMPANY
               December 6, 1995

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Fiscal and Program Management
  Remedial Project Manager (EPA):  Shawn Ghose, 214/665-6782
  State Contact: Darren Padilla
  Community Involvement Coord (EPA): Olivia Rodriguez Balandran, 214/665-6584
  Attorney (EPA):  Paul Wendel, 214/665-2136
  State Coordinator (EPA): Mark Satterwhite, 214/665-8505
  Prime Contractor:  None

Cost Recovery:
• PRPs Identified: 1
• Viable PRP:  Homestake Mining Company
• Enforcement Options: Ground water - RD/RA complete; Homestake was released from the
Consent Agreement of June 1983, because it completed supply of municipal waters to the
subdivisions and made payment for 10 year water supply to the City of Milan.

Radon - PRP financed radon study.
Present Status and Issues  	—

• The initial actions have provided a safe drinking water supply while studies have determined
that site contamination is not contributing to elevated indoor radon levels found in some area
homes. Efforts to stabilize mill tailings are underway at the Homestake Mining Company site.
• EPA released Homestake Mining from the Agreement and Stipulation of June 1983 to provide
municipal water system to the subdivisions near the site  in July 1994. The stipulated actions
were completed by November 1989.
• NRC has amended the license conditions to have the large tailings impoundment radon cover
installation completed by 1996, and the small impoundment cover completed by 2001, to conform
to the closure dates noted in the Federal Register of October 25,1991.
• In March 1995, NRC modified the license standards to exclude Chromium, Th-230 and
Radium-226 & 228 due to these contaminants being less than compliance standards between
1989 and 1993.
• The ground water corrective action is a Long Term Remedial Action (LTRA) project, and the
completion date is anticipated past the year 2000.
Cleanup Measurements
• The contaminant plume has been driven back almost 3/4 miles into the site boundaries of
HMC by injecting fresh water downgradient of the site. Over two trillion gallons of contaminated
water has been removed.
• Reverse gradient injection has assured that contaminants in the groundwater would not expand
into the shallow aquifer, thus making the shallow water usable in the down gradient areas.  Once
the tailings pile have been closed the site could be returned to beneficial use.
 December 6,1995
                                                           HOMESTAKE MINING COMPANY

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LEE ACRES  LANDFILL
(USDOI)
NEW MEXICO
EPA ID# NMD980750020
Site Description:
     EPA REGION 6
CONGRESSIONAL DISTRICT 03
        San Juan County
          Farmington
Location:     • 4.5 miles east southeast of Farmington in San Juan County.
            • Public land under the authority of the Bureau of Land Management (BLM).

Population:   «. In 1990 San Juan County had a population of 127,732 people, Farmington
            33,997 persons, and the Lee Acres Superfund Site approximately 600 individuals.
            At one time, approximately 165 single family residences used shallow alluvial
            ground water for washing & irrigation.  They are now using bottled water.
            • 561 people live within a 3 mile radius.

Setting:      • This is a Federal Facility.
            • The Lee Acres Superfund Site consists of a 60-acre closed landfill, an
            abandoned refinery and a residential subdivision 2,200 feet south of the site.
            • The landfill was acquired by San Juan County in 1962 through a lease with
            BLM for a landfill consisting of solid waste trenches. In 1978 San Juan County
            began to accept liquid wastes for disposal in three unlined waste lagoons.
            • BLM instructed San Juan County to close landfill in September 1985. Blm
            resumed unrestricted ownership.

Hydrology:   • Two aquifers present  The alluvial aquifer at 20-50 feet and the Bedrock
            aquifer at 50-80 feet. Only the alluvial aquifer is contaminated.
Wastes and Volumes
PRINCIPAL POLLUTANTS:
               1,1 dichloroethane
               1,1,1 - trichloroethane
               1,2 - dichloroethylene
               benzene
               manganese
                                                                  December 6, 1995

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VOLUME:
               Undetermined
Site Assessment and Ranking
                             NPL LISTING HISTORY
                                , Site HRS Score; 37,Qf  **
                                Froposed Da
                                   Final Date: €(/9&
                               "  NPt Update; &6,
Site Map and Diagram
                                                               Lee Acres
                                                                 Landfill
            WottaFV   • Sowing location
            DUubodAraa O Sudg« Grab Samp!*
            Surrcc«Wati*r A Bor«hote Locator

                               Lee Acres
                                             Shlprpck
                                                550
                                                Farmlnaton

                                                        Farmington
The Remediation Process 	

SHa History:

• In May 1962, San Juan County began to operate the unrestricted, 20-acre landfill for solid
  waste disposal.
• In 1980 an additional 40-acres were leased by the County. Liquid wastes from all sources
  were placed into lagoons that had been constructed.
• 1985 - toxic vapors caused 15 people to become sick and the Governor ordered the National
  Guard to secure site perimeter. San Juan County filled in the lagoons and fenced the site.
                                                                   December 6, 1995

-------
•  The New Mexico Environmental Improvement Division (NMEID) hired contractor to treat
  lagoon contents to prevent further release 01 gases.
•  The County filled in four (4) lagoons.
•  1986 - BLM found an alternate water supply and completed hookups in 1987.
•  The scope of the Remedial Investigation/Feasibility Study/Environmental Impact Statement
  (RI/FS/EIS) project as presented in BLM's work plan has been revised.
•  EPA issued a General Notice Letter to Giant Refinery and San Juan County on May 2,1991.
  On December 27,1993, an additional 371 General Notice Letters were distributed.
•  EPA issued a Special  Notice Letter to DOI/BLM to draft Federal Facility Agreement
  August 8,1991.
•  Technical Memorandum of Understanding between EPA, NMED and BLM was signed in
  April 1994.
•  Revised Remedial Investigation Report completed in April 1995.
•  A draft Feasibility Study was submitted in  June 1995; final approval will be granted in
   December 1995.
•  The Federal Facility Agreement was under discussion in September 1994 and will be approved
  in January 1996.

Other Environmental Risks:

•  The ground water and solid waste sludge are contaminated with minor concentrations of
volatile organic compounds (VOCs), primarily dichloroethane and benzene. High concentrations
of manganese, the major pollutant, are also present. Contaminants were found in a residential
well, presenting the potential of exposure to nearby residents who obtain their water from the
shallow ground water.  The source probably was an abandoned nearby refinery.
•  A release of hydrocarbon constituents, benzene, etc, has been found in the Lee Acres
subdivision.  A free phase product is present and is being remediated by Giant Refinery.
Record  of Decision:
   A Record of Decision is expected in 2nd Quarter of Fiscal Year 1996 (January - March).
                            ., No Record of Decision has been signed
Community Involvement	

Outreach Activities: BLM responsibility
       1.  Community Relations Plan: 5/89
       2.  RI Activities:  Local officials briefed 9/88; BLM fact sheet 10/88; BLM public meeting
      10&11/88; BLM fact sheet 1/89; BLM fact sheet and meeting 2/90; update 4/91, 6/94
• Citizens on site mailing list: 63
• Constituency Interest:  Predominately concerned with impacts to park land.

• Site Repository: Farmington Public Library, 100 West Broadway St., Farmington, MM 87401
LEE ACRES LANDFILL (USDOI)
December 6, 1995

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Technical Assistance Grant

• Availability Notice: 3/89
• Letter of Intent: None
• Grant Award: N/A
• Current Status: Federal Facility
Fiscal and Program Management
  Remedial Project Manager (EPA):  Bert Gorrod, 214/665-6779, Mail Sta. 6SF-LN
  State Contact: Maura Henning, NMED  (505)827-2922
  Community Involvement Coord. (EPA):  Olivia R. Balandrdn, 214/665-6584, Mail Sta. 6SF-P
  Attorney (EPA):  Mike Barra, 214/665-2143, Mail Sta. 6SF-DL
  State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
  Prime Contractor:  N/A

Cost Recovery: Federal Facility
• PRPs Identified: Department of Interior/Bureau of Land Management, and San Juan County.
• Viable PRP: Possibly Giant Refinery and San Juan County.
• Other possible PRPs may come from examination of recent 104(e) Letters.
Present Status and Issues	

• Fencing of the site and treatment of the lagoons, as well as the other activities on the Lee
  Acres Landfill (USDOI) site, have reduced the potential for exposure to contaminants while
  the site awaits further cleanup activities.
• BLM has prepared a Revised Remedial Investigation Report (RRI) that was approved by EPA
  and NMED in April 1995.
• A draft Feasibility Study was received in June 1995. It will be approved in December 1995.
• An issue of "National Interest" may result if EPA and Department of Interior (DOI) agree on
  language for the Federal Facility Agreement that can be used on other DOI/EPA sites.
 Cleanup Measurements
 • Since the ROD has not been prepared or signed, actual cleanup levels have not been
 established.  They will conform to State and Federal levels and designed to protect home owners
 in the Lee Acres Subdivision.
 • Proposed remedy is Natural Attenuation w/ monitoring for ground water, hot-spot removal of
 lagoonal sludge, capping of western half of landfill, and ground water monitoring of landfill's east
 half.
 • If remedy is not completed as above, contaminated ground water could reach the San Juan
 River, a primary river in New Mexico.
 December 6,1995
                                                            LEE ACRES LANDFILL (USDOI)

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PAGANO  SALVAGE
NEW MEXICO
EPA ID# NMD980749980
Site Description
                                                    EPA REGION 6
                                               CONGRESSIONAL DISTRICT 02
                                                       Valencia County
                                                       Other Names:
                                                 Waste Electric Transformer #4
Location:     • One-mile southeast of Los Lunas
            • 102 Edeal Road near east bank of Rio Grande.

Population:   • About 11,000 people obtain drinking water from public and private wells within
            3 miles of the site.

Setting:      • Surface water near the site is used to irrigate croplands.
            • Metal salvage operation on 1.25 acres.
            • Polychlorinated Biphenyl (PCB) contaminated oil was poured over insulated
            wire and burned on unprotected ground at several locations.

Hydrology:    • Ground water at the site is shallow (about 5 feet) and the soil is very permeable
            alluvial deposits.
Wastes and Volumes
      • 1. Principle pollutants: PCB, up to 1,400 parts per million (ppm) in soils.

      • 2. Volume: 5,100 cubic yards of PCB contaminated soil and debris.

Site Assessment and Ranking  	
                           NPL LISTING. HISTORY
                               Site BBS Scorn*, 35,57   *
                              Proposed Date: 6/24/8$
                               Final Dale; JQ/04V&3
                                NPL Update: Mo. J
                                                              December 6, 1995

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Site Map and Diagram
                                             Pagano
                                             Salvaae
                                            Los  Lunas
The Remediation Process
Site History:

• EPA began sampling soil to assess immediate threats.
• 3/87 - soil samples showed concentrations of PCBs and pesticides.
• 7/87 - EPA began a Removal of soils contaminated with more l.han 10 ppm PCBs.
• On-site removal activities began in June 1989.
• Approximately 5,100 tons of contaminated soil and debris were excavated and moved to a
permitted facility.
• Entire sou.ce of contamination was effectively remuveu storing site to original working
condition.
• 1/90, ERB completed removal of contaminated soil and debris with PCBs above health-based
levels.
• 9/90. Regional Administrator signs Record of Decision (ROD) which recommends no further
action based on the removal results.
• 10/92 site deleted from the National Priorities List (NPL) of Federal Superfund sites.
December 6, 1995
                                                              PAGANO SALVAGE

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Health Considerations:

• Direct contact and ingestion, also a potential source of ground water contamination.
Record of Decision
                                Signed; September 27,1990
J
• The Record of Decision for the Pagano Salvage site selected No Further Action.
• This choice precluded all other potential remedies as the previous removal action addressed all
significant site risks.

Community Involvement	

• Community Involvement Plan:  3/90
• Proposed Plan Fact Sheet and Public Meeting:  8/90
• Original ROD Fact Sheet:  1/90
• Milestone Fact Sheets:  10/92 (NPL Deletion)
• Citizens on site mailing list:  48

• Constituency Interest:  Low - ground water contamination.

• Site Repository:  Los Lunas Public Library, 460 Main Street, Los Lunas, NM 87031


Technical Assistance Grant   	
• Availability Notice: None
• Letters of Intent Received: None
• Grant Award:  None
• Current Status: Site is deleted from the NPL
Fiscal and Program Management
  Remedial Project Manager (EPA): Carlos Sanchez, 214/665-8507, Mail Sta. 6SF-AT
  State Contact: Dennis Slifer
  Community Involvement Coord. (EPA):  Olivia R. Balandran, 214/665-6584, Mail Sta. 6SF-P
  Attorney (EPA):  Jonathon Weisberg, 214/665-2180, Mail Sta. 6SF-DL
  State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
  Prime Contractor:
PAGANO SALVAGE
   December 6, 1995

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Cost Recovery:

• PRPs Identified; 5
• Viable PRPs:  Mary Pagano, Pagano Salvage, David Peluchette, Myrtle Smith, Sandia National
Laboratories (Department of Energy).

• Removal notices letters issued by EPA, no favorable responses received - 3/29/89.
• Unilateral Administrative Order for the removal action was issued by EPA - 6/8/89.
• PRPs did not agree to do the work, but negotiations are continuing on reimbursement for past
costs.
• EPA settled its costs with the PRPs through a Consent Decree.
Present Status and  Issues
• With the emergency removal of contaminated soils and debris, the EPA has removed the
sources of contamination and eliminated the potential for exposure to hazardous materials on the
site. Based on site investigation results, the EPA concluded that no further cleanup actions are
required at the site, which were confirmed by periodic monitoring of the ground water.
Cleanup Measurements
• 11,000 users of public and private water wells within three miles of the site now have no risks
from site contamination.
• 5,100 cubic yards of PCB-contaminated soil have been remediated.
 December 6,1995
                                                                      PAGANO SALVAGE

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PREWITT ABANDONED
REFINERY
NEW MEXICO
EPA ID# NMD980622773
Site Description
                                           REGION 6
                                   CONGRESSIONAL DISTRICT 03
                                           McKinley County
                                     West of Prewitt on U.S. Hwy. 66
                                                          Other Names:
                                                    Petroleum Products Refinery
                                                          Prewitt Tar Pits
Location:


Population:

Setting:
Hydrology:
   •  Two tracts west of Prewitt on U.S. Highway 66 in McKinley County.
   •  Some of the site is located on Navajo tribal lands.

   •  Approximately 75 people live within a 1 mile radius of the site.

   •  An estimated 1,600 people draw from the public and private wells
   within three miles of the site.
   •  Tract A, South of Highway 66, is 68.2 acres and contains the ruins of
   the refinery, including waste pits, oil/water separator, tank bases, and other
   rubble.
   •  Tract B, North of Highway 66, is 6.8 acres  and includes two major spill
   areas and the remains of a pump lift station.

   •  A shallow sandstone aquifer, which is the principal water supply has
   been contaminated to 200 ft. depth. A 700 ft. deep zone also shows
   evidence of contamination.
Wastes and Volumes
Principal pollutants:
• Ground water: lead, benzene, toluene, ethylbenzene, xylene, non-aqueous phase liquids
• Soils: asbestos, lead and polynuclear aromatic hydrocarbons ("PAHs")
• Separator: petroleum sludges
Volume:
• Approximately
• Approximately
• Approximately
• Approximately
• Approximately
• Approximately
• Approximately
50,000 gallons of contaminated ground water
43,500 gallons of non-aqueous phase liquids (NAPL)
15 cubic yards of asbestos containing materials
1175 cubic yards of pit material
1500 cubic yards of PAH contaminated soils
665 cubic yards of lead contaminated soils
80 cubic yards of sludges in the separator
                                                                 December 6, 1995

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Site Assessment and Ranking
                                  tlSTINQ
                                ^$iteHRSScore:44.24
                                Proposed: Datot 6/84/89
                                -  Final Date: 8/17/9&
Site Map and Diagram
The Remediation Process	

Stte History:

•  July 1989, under an agreement with EPA, Potentially Responsible Party (PRP) began
  activities to reduce immediate threats.
•  PRP removal activities included:  construction of a fence, treating well water to remove
  contaminants, provide alternate well water supply, and installation of a carbon filtration
  system.
•  April 1990, PRP removal activities completed.
•  Remedial Investigation (RI) Completed August 1991.
•  Feasibility Study (FS) completed February 1992
•  Record of Decision (ROD) signed on September 30,1992.
•  Special Notice for financing and performance of Remedial Design/Remedial Action (RD/RA)
was issued to PRPs on December 30,1992.
December 6, 1995
                                                        PREWITT ABANDONED REFINERY

-------
• Unilateral Administrative Order was issued to ARCO and El Paso Natural Gas on
May 14,1993.  Both parties have informed EFA thai: iliey intend to comply with the Unilateral
Administrative Order.

Health Considerations:

• Contamination of residential wells adjacent to the site; one well has been closed and a second
  has become contaminated.
• Direct contact with or ingestion of contaminated soils and ground water
Record  of Decision
                                         September aa» 3992
J
Ground Water
•  Ground Water Pump and Treat
•  Soil Vapor Extraction of the Non-Aqueous Phase Liquids

Soil Treatment:

•  Soil vapor extraction of the non-aqueous phase liquids
•  Landfarming of the West Pits area and hydrocarbon contaminated soils
•  Excavation and offsite disposal  of asbestos containing materials, lead contaminated
 soils and separator contents
Community Involvement
•  Constituency Interest: Moderate/major concern is well contamination, or the potential for
  contamination.
•  Outreach Activities: Update to NPL, August 17,1990; fact sheet 9/90.
•  Community Relations Plan: 12/1/89
•  RI Activities:  Local officials briefed 9/88; fact sheet 9/90; open house 9/90, open
 house 6/91, fact sheet 7/91, open house 4/92; public meeting 7/92.
•  Proposed Plan: 7-18-92
•  ROD feet sheet:  12-21-92
•  Revised Community Relations Plan: In development
•  RD/RA Activities: Open house 5/94; fact sheet 5/94; RD complete fact sheet 2/95; open
house 3/95; ground breaking and blessing ceremony 4/22/95.

• Citizens on site mailing list:  75

• Site Repository: Prewitt Fire House, Highway 66,  Prewitt, MM 87045

Technical Assistance Grant   	
•  Availability Notice:  2/89,5/94
•  Letters of Intent Received:  None; request for application packet 5/94
•  Grant Award: N/A
PREWITT ABANDONED REFINERY
    December 6, 1995

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Fiscal and Program  Management
• Remedial Project Manager (EPA): Monica Smith, 214/665-6780, Mail Sta. 6SF-LN
• State Contact: Darren Padilla
• Navajo Superfund Contact: Julie Curtiss
• Community Involvement Coord. (EPA):  Olivia R. Balandran, 214/665-6584, Mail Sta. 6SF-P
• Attorney (EPA): James E. Costello, 214/665-8045, Mail Sta. 6SF-DL
• State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
• Potential Responsible Parties: El Paso Natural Gas Company and ARCO

Cost Recovery:

• PRPs Identified:  3
• Viable PRP: ARCO, El Paso Natural Gas, and Rexene.
Present Status and Issues
•  PRPs are complying with the Unilateral Administrative Order for the Remedial Design and
the Remedial Action.

• The surface remediation, with the exception of the landfarm, is completed.  The asbestos and
lead contaminated soils have been removed and disposed offsite. The hydrocarbon contaminated
soils have been stockpiled as necessary for future landfarming. The landfarm  design was
approved on October 24,1995. The landfarm will be constructed in early 1996.

• The Soil Vapor Extraction system is being installed and tested to ensure that it will function
properly.
Cleanup Measurements
• Remediation of the Prewitt Superfund Site will reduce environmental risks for 75 people that
live within a 1 mile radius of the site.
• The site will be made safe for residential use.
December 6,1995
                                                          PREWITT ABANDONED REFINERY

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RINCHEM  CO., INC.
NEW MEXICO
EPA ID# NMD085267961
     EPA REGION 6
CONGRESSIONAL DISTRICT 01
        Bemalillo County
         Albuquerque
Site Description   	

Location:     • 5001 Edith Blvd. ME, Albuquerque, New Mexico.

Population:   • Albuquerque, 440,000.

Setting:      • Nearest private well is 0.2 miles from the site. The area is predominantly
            industrial, with 1 residential property about 5 buildings to the north.

Hydrology:    • The site is underlain by the Valley Fill Group , which in turn is underlain by
            the Santa Fe Group. The water table in the 88/92 series wells, is in the upper
            parts of the Santa Fe Group.
Wastes and Volumes
• The principle pollutants include industrial solvents(dichloro & trichloroethylene, dichloro &/
trichloroethane), acetone, methylisobutylketone (MIBK).
Site Assessment and Ranking
                           NPL LISTING HISTORY
                           % *   Stte HR$ Score 41.2Q
                              Proposed Date; 10/44/92
                                   Final Date!
                                 NPL Update: Mo.
COMMENTS: Rinchem, Inc. stated that consideration of MIBK in the Hazard Ranking System
process (from the 1984 report) was improper, since MIBK was not found in either the 1988 soil
or water samples, or in the 1992 water samples taken at the site by Rinchem.
                                                               December 6. 1995

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Site Map and Diagram
                                                           CO
                               Old Rinchem Site
                        Albuquerque. New Mexico
The Remediation Process
Site History:

» Rinchem transported hazardous waste from a waste generator's location to its facility,
repackaging the waste or storing it until a large quantity was accumulated. Rinchem then
transported the waste back to its generator or to a disposal facility.
 Record of Decision
 Community Involvement	

 • Community Interviews: (and availability sessions) 01/93; 9/9 - 9/11/94
 • Follow up letters mailed to community interview participants
 • Constituency Interest: Community members strongly opposed to site being listed on the NPL
 December 6, 1935
                                                                  RINCHEM CO.. INC

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Technical Assistance Grant
• Availability Notice:
• Letters of Intent Received:
• Grant Award:

Fiscal and Program Management
• Remedial Project Manager (EPA): Shawn Ghose, 214/665-6782, Mail Sta. 6SF-LN
• State Contact:  Daren Padilla
• Community Involvement Coord. (EPA): Olivia R. Balandran, 214/665-6584, Mail Sta. 6SF-P
• Attorney (EPA):  Courtney Johnson, 214/665-8055, Mail Sta. 6SF-DL
• State Coordinator (EPA):  Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
• Prime Contractor: None

Cost Recovery:

• Potentially Responsible Party(s) (PRPs) Identified: 7
• Viable PRP:
• General Notice letter sent to PRPs on 6/17/93
• Special Notice to perform remedial investigation/feasibility study (RI/FS), sent on July 5,1994.
• Negotiations for PRP conducted RI/FS terminated in October,1994.
Present Status and  issues
• The main Potentially Responsible Party (Rinchem) has requested the opportunity to clean up
the site. Due to uncertainty in the current contaminant concentration, EPA has provided
Rinchem an opportunity to furnish additional data (1 monitor and 2 deep wells, plus surface soil
samples) to evaluate current risk posed by the site.  Rinchem completed all investigations except
the installation of two deep monitoring wells requested by NMED. NMED will pursue this
investigation under New Mexico Water Quality Commission regulations.
• The latest round of groundwater sampling in November 1994, March 1995, and June 1995,
indicates only one upgradient well to be contaminated above the drinking water standard. Rest of
the 11 monitor wells are below detection limit of 5 ppb for TCE.
Cleanup Measurements
• The contaminated area is estimated to be small. EPA is in the process of evaluating risk at
the site with surface samples provided by Rinchem.
RINCHEM CO.. INC
December 6, 1995

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SOUTH  VALLEY
NEW MEXICO
EPA ID# NMD980745558
Site Description
     EPA REGION 6
CONGRESSIONAL DISTRICT 01
        Bemalillo County
          Albuquerque

         Other Names:
   South Valley PCB Tank Site
Location:     Southwest Albuquerque, New Mexico.  Mixed industrial/ residential area
             encompassing one square mile.

Population:   • Approximately 70,000 people in Albuquerque are served by the San Jose
             reservoir system.

             • A residential district of 590 people lies just to the north of the General Electric
             facility.

Setting:       • Nearest residence is within the site boundaries.

             • Municipal wells San Jose (SJ)-3 and SJ-6 were decommissioned in 1981 because
             of contamination with low levels of organic solvents.  These wells were plugged
             and abandoned in September 1994.

Hydrology:    • The western portion of the site is generally underlain by three aquifers- the
             recent floodplain alluvium or shallow aquifer, the intermediate aquifer, and the
             undivided Santa Fe Formation, or deep aquifer. In the eastern portion of the
             site, the floodplain alluvium is absent.  Bajada deposits lie at the surface to the
             east and only two water-bearing formations are present.

             • The flood plain alluvium and the intermediate zone are separated from each
             other by a silty clay zone of up to 20 feet in thickness. In some areas, this clay
             zone is absent.  It is absent east of the AMAFCA Channel due to non-
             deposition/erosion.

             • The intermediate zone is separated from the undivided Santa Fe Formation  by
             a change in grain size from sandy gravel to sand.  This change in grain size  acts as
             a semipermeable barrier for downward migration of contaminants.

             • The two decommissioned onsite wells, as well as other offsite municipal water
             supply wells, are screened in the undivided Santa Fe Formation.
                                                                     December 6, 1995

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Wastes and Volumes  —	—	

1.    Principle Pollutants:

      • Halocarbons (1,1-dichloroethene, trichloroethene, 1,1 dichloroethane,
      tetrachloroethane) and Aromatics (benzene, ethylbenzene, toluene xylene) are found in
      shallow ground water.
      • Halocarbons & Aromatics are present in the upper 60-feet of the intermediate ground
      water.
      • Halocarbons are found in deep intermediate zone.

2.    Volume:

      • Approximately 5,000 cubic yds. of solvent-contaminated soil on various Potentially
      Responsible Party (PRP) properties.
      • Petroleum spills on or near the Duke City, Texaco, Chevron USA, ATA Pipeline, and
      Whitfield properties and in close proximity to other petroleum pipelines.
      • Contaminated ground water, volume unknown.
Site Assessment and Ranking
                               NPL LISTING HISTORY
                                   Sit© HRS Scorn 42.64
                                  Proposed Date: 12/30/82
                                   ^ Final Date 9/08/82
                                 NPt Updatef Original NPL
SIGNIFICANT COMMENTS RECEIVED:  AmeriGas noted that the South Valley area
designation should be substantially narrowed; that it is clear that neither operations nor
conditions at certain locations, including the AmeriGas property, could have contributed to the
city well problems, and that the NPL be reviewed for site listings that are in reality only broad
geographic areas. The Agency believes that as ground water flow under a variety of conditions
has been determined, the site should not be redefined.  Furthermore, designation of a site on the
NPL is for information purposes, and does not imply that a facility on the site is responsible for
the releases. AmeriGas had a release on VOCs that contaminated a portion of the intermediate
aquifer.
The Remediation Process	—

She History:

• Industrial development in the South Valley area began in the 1950s.  Early industry included
metal parts manufacturing. By the 1960s, organic chemicals were being handled in the area.
Presently, petroleum fuels and various other organic chemicals are stored and handled within the
area.
• A drum storage at the northwest corner of the AF Plant 83/GE site leaked chlorinated
solvents into the soil. EPA removed 3,450 gallons of contaminated oil, 63,580 pounds of
contaminated soil and debris, along with a 48,140-pound tanker.
 December 6,1995
                                                                         SOUTH VALLEY

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 • EPA graded and backfilled the excavated areas.
 • Chlorinated solvent contamination of ground water has resulted in the shut-down of twenty
 private and two municipal water supply wciis.
 • EPA completed this initial phase in 1988 with the installation of a new replacement well.

 Health Considerations:

 • POTENTIAL HEALTH RISKS: Wells in the San Jose well field area are contaminated with
 volatile chlorinated compounds, forcing the closing of one private well and two Albuquerque
 municipal wells.
 • Results of the Remedial Investigation and Endangerment Assessment show that in the offsite
 areas there is not a significant threat to public health or the environment.

 Other Environmental Risks:

 • Contamination in the soil  & shallow ground water has been found in the residential area north
 of the GE Plant Soil contamination, found 9-feet below the surface, presents no threat the
 shallow ground water is being remediated.
 • The deep aquifer has been contaminated with chlorinated solvents. If unchecked, the nearest
 City water supply well may be impacted.
Site Map and Diagram
          General Electric
                 Duke City
          General Electric
                           Texaco
         South Valley
                                                           Whltfleld
                                                          Tank Lines
Edmond Street
    Property
   CUNIVAR)
SOUTH VALLEY
                                                                    December 6, 1995

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Record of Decision
Operable Unit 1.

      DATE SIGNED:
      REMEDY:
      STATUS:

Operable Unit 2.
      DATE SIGNED:
      REMEDY:
      STATUS:
Operable Units 3 & 4.
      DATE SIGNED:
      REMEDY:
      STATUS
Operable Units--5 & 6.
       DATE SIGNED:
       REMEDY:
       STATUS:
       REMEDY:
       STATUS:
March 22,1985 (IRM)
Replace city water supply wells, San Jose #3 & #6  (IRM)
Burton #4 (replacement) well was completed in April 1987
September 30,1988.
Plug SJ #3 & #6 wells plus any private wells that might be a
conduit from shallow to intermediate aquifers.  Ground water
monitoring and access restrictions are required.
Work completed in 9/94

June 1988 (Univar)
#3 - Pump and treat ground water
Pump and treat system operational  since 4/92

#4 - No further action

September 30,1988 (Air Force Plant 83/GJE.)
#5 . Pump and treat shallow ground water; soil cleanup
Pump and treat system operational  since 5/94 for shallow ground
water.
No action on soil.

#6 - Pump and treat deep ground water aquifer
Remedial Design was completed in May 1995.
Construction began on remediation system in July 1995.
Remediation operations will begin  April 1996.
 Community Involvement  	—	

 • Community Involvement Plan: Developed 01/84
 • Open houses and workshops: 9/88,11/93
 • Original Proposed Plan Fact Sheet and Public Meeting: 5/88, 7/88, 8/88, 2/89
 • Original ROD Fact Sheet: 7/88,11/88, 4/89
 • Milestone Fact Sheets: 5/89, 3/90, 4/90, 6/90, 3/91,11/93, 6/95

 • Citizens on site mailing list: 255

 • Constituency Interest:  Organized community effort, Spanish translators needed

 • Congressional following: Periodic interest

 • Site Repository.  Albuquerque Public Library, 501 Copper Avenue, Northwest, Albuquerque,
 NM 87102; information is also available at the University of New Mexico library.
 December 6,1995
                                                                        SOUTH VALLEY

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 Technical Assistance Grant
 • Availability Notice: 01/89
 • Letters of Intent Received:
       1) 1/12/89 from San Jose Area Community Awareness Council - Notice period 1/26 -
       2/26/89
 • Final Application Received: unknown
 • Grant Award: 2/23/90
 • Current Status:  Completed TAG work; all money awarded, grant closed out.
 Fiscal and Program Management
 • Remedial Project Manager (EPA): Bert Gorrod, 214/665-6779, Mail Sta. 6SF-LN
 • State Contact:  Susan Morris, NMED (505) 827-2890
 • Community Involvement Coord. (EPA): Olivia R. Balandran, 214/665-6584, Mail Sta. 6SF-P
 • Attorney (EPA): Robyn Moore, 214/665-8054, Mail Sta. 6SF-DL
 • State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
 • Prime Contractor: Jacobs Engineering (EPA oversight)

 Cost Recovery: EPA Lead (Enforcement)

 • PRPs Identified:  12
 • Viable PRPs:  9

 PRP PROFILE

 A.     PRPs IDENTIFIED: ACF Industries, Amerigas Corp, Chevron, Dixie Petrochemical,
       Duke City Distributing, Edmunds Chemical Co., General Electric, U.S. Air Force,
       Schwartz-Edmunds, U.S. Dept of Energy, Van Waters and Rogers, Whitfield Tank lines.

 B.     VIABLE PRPs: Same except for Chevron, Edmunds & Schwartz - Edmunds, Whitfield
       Tank Lines.

 C.     Two of the PRPs have conducted additional RI/FS activities on their properties.
       1.     Edmunds Street: UNIVAR sponsored the investigation. The investigation was
             divided into two  parts, onsite soils and ground water contaminant plume.
             a)     Onsite - Revised Plan for second phase RI received in November 1987.
                   Field work was completed in August 1988. Report received  in February
                   1989 showed no significant soil contamination remaining.
             b)     Plume - Installation of monitoring wells to locate area and concentration
                   of contaminant plume completed. Public meeting on ground water ROD
                   was held May 26,1988.  Consent Decree was negotiated. Signature by
                   PRPs in 8/89. Public comment ended May 11,1990.  The Consent Decree
                   became effective June 1,1990. Plume extraction and treatment system in
                   place and began operation 9/90.
       2.      Former Air Force Plant 83 (GE): Field work on a second phase of Remedial
             Investigation has been completed. Public meeting was held September 1,1988.
             ROD signed 9/30/88.  A Unilateral Administrative Order for performance of
             RD/RA issued 7/89 to GE. GE responded, agreeing to perform the work in
             August 1989 and is complying with the Order. GE is now preparing the RD.
SOUTH VALLEY
                                                                     December 6, 1995

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D.    The Underground Storage Tank program for NMED and the NMED Groundwater
      Technical Section are conducting investigations at four of the PRP properties (Chevrcn,
      Texaco, Duke Cities Distributing and Whitfield Tank Lines) to determine the presence of
      floating and dissolved hydrocarbons in the area ground water.

E.    A Unilateral Order has been issued to Chevron and the ATA pipeline to control the
      petroleum contamination upgradient of Edmund Street to keep it from interfering with
      the Edmunds RA.  The respondents are currently in compliance.
Present Status and Issues	

• Through the immediate removal of contaminated oil, soil, and debris, the installation of a new
well, and the ongoing treatment of remaining contaminated soil, the EPA has reduced possible
hazardous exposures at the South Valley site while ground water extraction and treatments are
continuing.

• The South Valley Superfund Site includes a low-income, Hispanic neighborhood (a so-called
"barrio").  However, EPA has maintained close contact with the citizens by participating in the
San Jose Community Awareness Council meetings, as well as other imormal  public meetings and
open houses.  Environmental Justice issues have not been widely voiced at this particular site,
although they are an underlying concern.
Cleanup Measurements	

• The water supply for 70,000 customers of the San Jose Reservoir will be protected.

• 5,000 cubic yards of solvent-contaminated soil will be remediated.

• Both shallow and deep aquifers are and will be remediated.
 December 6,1995
                                                                          SOUTH VALLEY

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 UNITED NUCLEAR
 CORPORATION
 NEW MEXICO
 EPA ID# NMD030443303
     EPA REGION 6
CONGRESSIONAL DISTRICT 03
        McKinley County
         Church Rock,
                                                           Other Names:
                                                       UNC Mining and Milling
                                                          Church Rock Mill
Site Description  	

Location:     • 17 miles northeast of Gallup, New Mexico
             • Located on southern border of Navajo reservation,

Population:    • The surrounding area is sparsely populated, with the nearest residence located 1
             1/2 miles from the site. A Navajo Indian Reservation lies 1/2 mile to the north of
             the site.

Setting:       • Four water wells are within a 4-mile radius, the nearest being 2 miles northeast
             of the site; however, nearby residents generally have used bottled water for
             drinking, since the well water had a bad taste.
             • Tailings impoundment -100 acres, 15-20 feet thick.
             • Abandoned mill facility ("active site" under UMTRCA) - 25 acres.
             • Tailings unstabilized.
             • Nearest residence is 1.5 miles to the north.
             • Nearest drinking water well is 1.7 miles

Hydrology:    • Site underlain by Upper Gallup and alluvial aquifer.
             • Alluvial contamination to north and south;  bedrock contamination to north and
             east
             • Tailings pile adjacent to pipeline arroyo.
Wastes and Volumes
•The principle pollutants include acidic mill tailings.
      - Total dissolved solids: >60,000 parts per million (ppm tailings liquid)
      Sulfate: >40,000 ppm, (tailings liquid)
      - Thorium: 40,000 pci/1 (tailings liquid)
      - Radium: 45 pci/1 (tailings liquid)
      - Aluminum: > 2000 ppm (tailings liquid)
      - Ammonia:  > 5000 ppm (tailings liquid)
      - Iron: > 4000 ppm (tailings liquid)
• 4.7 million cubic yards tailings
                                                                  December 6, 1995

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Site  Map and Diagram
                    PROPERTY
                    BOUNDRY
       MILL FACILITIES
       (DECOMMISSIONED
       1991-1992)
   PIPELl
   ARROYO
               EVAPORATION
               PONDS
NORTHEAST
PUMP-BACK
WELLS
     ZONES
     REMEDIAL
     'ACTION      .
     TARGETAREA\
                                                                     \
                                                            ZONE 1 REMEDIAL
                                                            ACTION TARQET
                                                            AREA
 BORROW PIT
 NO. 2 (RECLAIMED)
                          "SOUTHWEST ALLUVIUM
                          REMEDAIL ACTION
                          TAFIQ^TAPEA	
                                 UNITED NUCLEAR CORPORATION
                                    CHURCH ROCK, NEW MEXICO
Site Assessment   and Ranking
                              NPL OST1MG
                              ^  - fftte HR$ $cq*f! 30^36
                                proposed 'Date: "<2/S0
                                vf\ Final Date: 9/00/93
The Remediation Process	

Site History:

• Mining began in area in 1968, Mill opened in July 1977.
• Tailings pond broke in 1979 releasing 93 million gallons of slurry to Rio Puerco.
• Mill closed in June 1982.
• MM turns over uranium mill licensing authority to Federal government (NRC) in June 1986.
• EPA finalized its Remedial Investigation and Feasibility Study in August 1988 addressing
ground water contamination at the site.
• Remedial Action will be conducted by UNC pursuant to EPA's UAO and NRC's Source
Material License.  Reviews of the Remedial Action will be made on annual basis, and
                                                                    December 6,1995

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 modifications made to the ground water pump and treat program as necessary, to achieve
 cleanup standards to the extent practicable.
 • On September 12,1989, EPA sent UNC a letter approving the Remedial Design according to
 the UAO and comments on the RAP and RD.  UNC submitted Remedial Action modifications
 on June 18,1990; approved by EPA in August 1990.
 • UNC proposed on April 24,1991 additional wells in the Upper alluvium north of the site (to
 set lysimeters in auger holes of varying depth).  Preliminary results show higher nitrate
 concentration in the deeper lysimeters.
 • UNC has requested a change for the nitrate cleanup criteria.   EPA and NRC will evaluate the
 ground water remedy in its Five Year Review of the site.

 Health Considerations:

 • Several people use shallow alluvial aquifers in the area. The nearest domestic/livestock well  is
 1.7 miles downgradient of the site in the Upper Gallup aquifer.
 • Contaminants of Concern: heavy metals,low level radionuclides, nitrates, sulfates and TDS.

 Other Environmental Risks:

 • A break in the tailings dam in 1979 sent 93 million gallons of tailings fluid into the Rio
 Puerco. The upper Gallup aquifer is contaminated in the vicinity of the pond.

 Record of  Decision		
                                        Signed:
                                September 3Qf 1988
• The remedy includes:  Ground water pump and treat in the Upper Gallup Zone 3 aquifer and
Southwest Alluvial aquifer, limited action in Zone 1 of the Upper Gallup Aquifer.
  Other Remedies Considered
Reason Not Chosen
1. No Action
2. Limited Action
3. Pump and treat In Zone 3, Southwest Alluvium, and two hot spots
4. Pump and treat In Zone 1, Zone 3, Southwest Alluvium, and two hot spots

• The 1993 Ground Water Corrective Action Report by UNC has been reviewed. With EPA
concurrence, NRC has not approved termination of pumping at Southwest Alluvium and Zone 1
as was requested by UNC.
UNITED NUCLEAR CORPORATION
                                                                      December 6, 1995

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 Community Involvement
 • Community Involvement Plan:  Developed 06/84, revised 05/89
 • Open houses and workshops:  08/88 and 2/27/92
 • Original Proposed Plan Fact Sheet and Public Meeting: 08/88
 • Original ROD Fact Sheet: 10/88
 • Milestone Fact Sheets: 05/90,06/91,2/92
 • Citizens on site mailing list 227
 • Constituency Interest: No population center near the site. Major concern has been potential
 water well contamination for nearby Navajo  reservation, but no actual contamination has been
 noted. Interest in the Rio Puerco continues with water hookups as the primary request.

 • Site Repository: Gallup Public Library, 115 West Hill Avenue,  Gallup, NM 87301

 Technical Assistance Grant	
• Availability Notice:  01/89
• Letters of Intent Received: None
• Grant Award: N/A

Fiscal and Program Management
• Remedial Project Manager (EPA):  Shawn Ghose, 214/665-6782, Mail Sta. 6SF-LN
• State Contact:  David TrujiUo
• Navajo Superfund Contact:  Julie Curtiss
• Community Involvement Coord. (EPA): Olivia R. Balandran, 214/665-6584, Mail Sta. 6SF-P
• Attorney (EPA): John Dugdale, 214/665-8027, Mail Sta. 6SF-DL
• State Coordinator (EPA): Mark Satterwhite, 214/665-8505, Mail Sta. 6SF-LN
• PRP(s) :  United Nuclear Corp
• EPA Oversight Contractor:  Jacobs Engineering

Cost Recovery:

• PRPs Identified: 2
• Viable PRP: UNC Resources, Inc. (parent company to UNC Mining & Milling, now called
UNC, Inc.)
• On June 29,1989, EPA issued UNC a Unilateral Administrative Order (UAO) requiring the
company to implement the RAP and RD as amended by EPA comments. On August 2, 1989,
UNC agreed to comply with the UAO.
Present Status and Issues
• The initial actions performed at the United Nuclear Corporation site have stabilized the mine
tailings and have protected the Rio Puerco from further contamination spills.
* Groundwater treatment is underway since 1989, reducing contamination levels while further
cleanup activities are being completed.
• The cleanup of the ground water by extraction and evaporation of contaminated water has
been in progress for four years.
• A five year review of the remedial process will be release for comment in Winter 1996.
December 6,1995
UNITED NUCLEAR CORPORATION

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• UNC completed mfll decommissioning, decontamination, and placement of the interim cover
on the tailings site by November 1993.
• At the request of UNC, NRC has mourned it's license to allow the mill site and the buildings
area for unrestricted use. The restricted area is now limited to the tailings site. The modification
was approved by NRC in April 1995.

Cleanup Measurements  —	
• NRC license conditions have stipulated radon cover for the tailings impoundment to be
completed by 12/31/97 to conform to Federal Register announcement of 10/25/91.
• The Navajos would like to use a part of the site for annimal grazing. EPA will evaluate the
feasibility of a "partial delisting " of the site to return the surface to beneficial use.
UNITED NUCLEAR CORPORATION
Decembers. 1995

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