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Superfund Site Report: STOKER COMPANY
  • Map Locating Superfund Site
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  • Site Description
    Stage of Clean-up: Study Underway

    Stoker Co. operates at 3390 Dogwood Road in a sparsely populated agricultural area in Imperial, Imperial County, California. The company has been an aerial pesticide applicator and pest control supplier since 1966 and in 1990 employed 45 people. A canal that runs along the southern and eastern borders of the airstrip delivers water to a residence less than 80 feet from the site, wetlands, and a commercial fishery. The wetland is located along the entire length of the airstrip and provides habitat for four endangered or threatened species. The fishery produces catfish for human consumption and is located 0.25 mile from the site. Wash waters from the cleaning of pesticide application equipment are sprayed onto a 20-acre land treatment area on-site consisting of a dirt road and landing strip. Occasionally rinse waters from the rinsing of hoppers in the aircraft and pesticide containers were also sprayed on this area. The disposal of wash waters is permitted under Waste Discharge Requirements issued by the California Regional Water Quality Control Board (CRWQCB) in October 1974 and June 1988. Under this permit, Stoker is required to sample the unsaturated zone and ground water beneath the site. The requirements indicate that approximately 300 gallons of pesticide rinsewater per day were disposed of in the land treatment area in the 1970s, dropping to approximately 100 gallons per day sometime prior to 1988.  More...
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  • Threats and Contaminants
    Even though the site is located in an agricultural area where pesticides are used extensively, the levels of pesticides in air, surface water, sediment, and soil samples greatly exceed background concentrations. In 1988, several pesticides were detected in the canal. Pesticides also were found in on-site soil and the pond. Sediment and air samples collected in 1989 indicated that pesticides had been released into the air and the wetlands.

    Contaminants Detected

    Air Soil Other
    ALDRIN X   
    DDE X   
    DDT X X 
    DEMETON    X
    PHORATE  X  

    Groundwater and Drinking Water

    Were drinking water wells shut down due to contamination? No data
    Are drinking water wells potentially threatened? No data
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  • Pre-Cleanup Rankings
    EPA Hazard Ranking System scores for STOKER COMPANY:

    Less Hazard National Average More Hazard
    0%         50%         100%

    Overall site:
    Surface water migration:
    Air migration:
    Soil exposure:

    Rank Superfund sites in the U.S., CALIFORNIA, or in IMPERIAL County by EPA Hazard Ranking Scores.

    *Note: EPA's Hazard Ranking System is designed to screen and prioritize sites for the Superfund program, based on limited data available at time of listing. These scores are not based on a comprehensive risk assessment of the site and do not reflect conditions after initiation of cleanup work.
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  • Site Information
    EPA ID: CAD066635442
    Address: 3390 DOGWOOD ROAD
    IMPERIAL, CA 92251
    Other Names: STOKER CHEMICAL CO.
    Site Ownership: Private
    Category of Site: No data
    Date of Proposed Listing on the NPL: July 29, 1991
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  • Potentially Responsible Party (PRP) Involvement
    Number of PRPs currently associated with this site: 0
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