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Superfund Site Report: MONTROSE CHEMICAL CORP.
  • Map Locating Superfund Site
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  • Site Description
    Stage of Clean-up: Design Underway

    Conditions at proposal (October 15, 1984): Montrose Chemical Corp. manufactured DDT on a l3-acre site in a light industrial/residential area of Torrance, Los Angeles County, California, from 1947 until 1982. About 3,000 people live or work within 0.25 mile of the site. The company's operations included formulation, grinding, packaging, and distribution of DDT. According to analyses conducted by EPA, Montrose, and various State and local agencies, on-and off-site soils, surface water, and sediments are contaminated with DDT. The major transport mechanisms identified were storm water run-off and aerial emissions. On May 6, 1983, EPA issued an Administrative Order under CERCLA Section 106 requiring Montrose Chemical to cease all discharges of DDT and to initiate a study to determine the nature and extent of contamination. After a more detailed review of the Montrose site, EPA determined that further work was necessary to characterize the site and evaluate alternatives. Therefore, EPA prepared a workplan for a remedial investigation/feasibility study (RI/FS). This second phase of investigation will assess all areas of contamination, both on-and off-site, and any public health and environmental impacts.  More...

    Sources of Contamination:
    • Discharge to sewer/surface water
    • Dumping - unauthorized
    • Inadvertent spill
    • Landfill
    • Manufacturing process
    • Other
    • Storage - drums/containers of waste
    • Storage - finished product
    • Storage - raw material
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  • Threats and Contaminants
    Soils at and immediately surrounding the former Montrose plant are contaminated with DDT, the pesticide BHC, and CHLOROBENZENE. The soils under the Central Processing Area of the former Montrose plant are contaminated with CHLOROBENZENE in NAPL form. Chlorinated solvents such as TRICHLOROETHYLENE and PERCHLOROETHYLENE have also been detected in soils at the Jones Chemicals facility and sporadically at the former Montrose plant property. Surface water pathways and sediments are contaminated with DDT.  More...

    Contaminants Detected

    Air Soil Other
    DDD  X  
    DDE  X  

    Groundwater and Drinking Water

    Were drinking water wells shut down due to contamination? No
    Are drinking water wells potentially threatened? Yes
    Population served by the threatened wells: > 100,000
    Aquifer discharges into: A drinking water aquifer
    Population served by water wells in the aquifer: > 100,000
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  • Pre-Cleanup Rankings
    EPA Hazard Ranking System scores for MONTROSE CHEMICAL CORP.:

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

    Overall site:
    Surface water migration:
    Ground water migration:
    Air migration:

    Rank Superfund sites in the U.S., CALIFORNIA, or in LOS ANGELES 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: CAD008242711
    Address: 20201 S NORMANDIE AVE
    TORRANCE, CA 90502
    Site Ownership: Private
    Category of Site: Manufacturing Plant
    Date of Final Listing on the NPL: October 04, 1989
    List Standard Industrial Classifications (SIC) associated with current and past activities at the MONTROSE CHEMICAL CORP. Superfund site.
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  • Potentially Responsible Party (PRP) Involvement
    Number of PRPs currently associated with this site: 0
    Hazardous waste received from off-site generators/transporters? Yes
    Number of past and present PRPs who contributed less than 1% of the waste: 0
    Number of owners/operators which are also municipalities: 0

    List Potentially Responsible Parties identified by U.S. EPA as associated with the MONTROSE CHEMICAL CORP. Superfund site.
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