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Pacific Southwest, Region 9: Superfund

Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations

Fresno Municipal Sanitary Landfill

EPA #: CAD980636914

State: California(CA)

County: Fresno

City: Fresno

Congressional District: 20

Other Names:

Bulletin Board

Links

Description and History

NPL Listing History

NPL Status: Final

Proposed Date: 06/24/88

Final Date: 10/04/89

Deleted Date:

The 145-acre Fresno Municipal Sanitary Landfill site was owned and operated by the City of Fresno (City) from 1935 until it was closed in 1989. While conducting tests in 1983, the California Department of Health Services found that methane gas and vinyl chloride had migrated from the landfill to the surrounding areas. These tests also concluded that contaminated groundwater had migrated off-site to several private residential wells located nearby. The City installed monitoring wells around the landfill perimeter in 1984. Subsequent tests indicated that volatile organic compounds (VOCs) were present in groundwater samples collected from wells at the edge of the landfill. Nine municipal wells are located within three miles of the site. Water from these wells empty into a blended system that serves the City of Fresno. The general distribution area of the system serves approximately 300,000 people. Several irrigation and private residential wells are located within a few thousand feet of the site.

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Contaminants and Risks

Contaminated Media
  • Groundwater
  • Air
  • Soil and Sludges

Ambient air samples collected at the landfill contained high concentrations of methane and vinyl chloride, and lower concentrations of VOCs. As stated above, groundwater is contaminated with VOCs. Since private wells located south of the landfill are contaminated with VOCs, area residents who depend on these wells as their sole source of drinking water could be exposed to site-related contaminants. The City has installed filters on the affected wells

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Who is Involved

This site is being addressed through Federal and municipal actions.

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Investigation and Cleanup Activities

The implementation of remediation at the Fresno Sanitary Landfill is addressed by the creation of two Operable Units. Operable Unit 1 includes remediation of the landfill through the construction of an engineered cover and a landfill gas collection system. Operable Unit 2 has been established to remediate contaminated groundwater.


On June 10, 1998, EPA and the City entered a formal agreement called a Consent Decree (CD) with the District Court. This agreement formalizes the final cleanup actions for the site. The CD calls for the City to begin the construction of Operable Unit 1 and develop the remedial design, construct and conduct the cleanup effort for Operable Unit 2.

Initial Actions

Initial Interim Actions: In 1984, the City installed wells around the perimeter of the landfill to monitor methane and groundwater. The City also constructed landfill gas migration barriers on east and west sides of the landfill to prevent methane from migrating off-site to nearby homes. In 1990, the City began the removal of migrating landfill gas containing VOCs. The treatment involved placement of an active vacuum on an existing gas migration barrier to enhance its effectiveness. The landfill gas vacuum action was completed in 1991.

Cleanup Ongoing

Trash and Landfill Gas Contamination Investigation: The City began an investigation into the nature and extent of contamination at the Fresno Sanitary Landfill in 1990. The study addressed contamination in the groundwater, landfill gas, soils, leachate, and surface gas emissions. As a result of the findings of that investigation, EPA selected a cleanup remedy for Operable Unit 1 in 1993 that called for capping the landfill, constructing a gas collection system, and building a stormwater management system.

Remedy Selected

Groundwater: As stated above, in 1990, the City began an investigation into the nature and extent of groundwater contamination. As a result of the findings of that investigation, EPA selected a cleanup remedy in September of 1996.

Cleanup Ongoing

Construction of a landfill cap, gas control wells and water treatment system commenced in May of 2000 and was completed in 2003.

Cleanup Ongoing

Start up of the landfill flare and the water treatment system began the week of September 10, 2001 as Phase 1 of the Remedial Action. Phase 1 of the Remedial Action is designed to capture and treat groundwater contaminants along the downgradient leading edge of the landfill. Prior to Phase 1, the City of Fresno initiated an Early Groundwater Remedial Action in May 1999 which consisted of the operation of three groundwater extraction wells and two, portable treatment units in an effort to expedite groundwater cleanup. As stated above, full operation of the groundwater treatment system started September 2001. Initiation of Phase 1 remedial activities includes the operation of five groundwater extraction wells located along the downgradient perimeter of the landfill. The extracted groundwater is treated through a packed tower aerator which is used to volatilize and remove contaminants from groundwater. Contaminant off-gas is incinerated by the landfill gas flare.
In September 2005, the EPA completed the five-year review of the remedies for OU 1 and OU 2. Seven recommendations are being addressed as a result to ensure that the remedies remain protective in the future. See below for a copy of the complete five-year review report and the fact sheet summary.

Cleanup Ongoing

EPA is continuing to work with the City of Fresno and the State to develop institutional controls to protect the remedies for OU1 and OU2.

Groundwater: In 2007, evaluation of the Phase I of the Remedial Action was completed and Phase II of the Remedial Action was initiated. Phase II is designed to address deeper groundwater contamination along the downgradient perimeter of the landfill. Installation of Phase II extraction and monitoring wells is currently underway.

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Cleanup Results to Date

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Potentially Responsible Parties

Potentially responsible parties (PRPs) refers to companies that are potentially responsible for generating, transporting, or disposing of the hazardous waste found at the site.


On-line information about the PRPs for the site is not yet available.

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Documents and Reports


Show details for Fact SheetsFact Sheets
Show details for Records of DecisionRecords of Decision
Show details for Technical DocumentsTechnical Documents

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Community Involvement

Public Meetings:

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Public Information Repositories

The public information repositories for the site are at the following locations:

Fresno County Central Library
2420 Mariposa Street,
Fresno, CA 93721
(209) 488-3195

The most complete collection of documents is the official EPA site file, maintained at the following location:

Superfund Records Center

Mail Stop SFD-7C

95 Hawthorne Street, Room 403

San Francisco, CA 94105

(415) 820-4700

Enter main lobby of 75 Hawthorne street, go to 4th floor of South Wing Annex.

Additional Links

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Contacts

EPA Site Manager
Patricia Bowlin
415-972-3177
Bowlin.Patricia@epamail.epa.gov
US EPA Region 9
Mail Code SFD
75 Hawthorne Street
San Francisco, CA 94105
EPA Community Involvement Coordinator
Jackie Lane
415-972-3236
1-800-231-3075
Lane.Jackie@epamail.epa.gov
US EPA Region 9
Mail Code SFD
75 Hawthorne Street
San Francisco, CA 94105
EPA Public Information Center
415-947-8701
r9.info@epa.gov
State Contact
James Rohrer
916-255-3709
JRohrer@dtsc.ca.gov
California Department of Toxic Substances Control
8800 Cal Center Drive
Sacramento, 95826-3200
PRP Contact
Community Contact
Other Contacts
After Hours (Emergency Response)
US EPA
(800) 424-8802

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