The Issue: 

To ensure a plentiful and safe food supply and the control human and animal pests , the EPA is charged under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) with registering pesticides in the U.S. and ensuring that their use poses limited risks to human health and the environment.   

The Solution:  

To support the registration and use of pesticides in the U.S., agrochemical companies are required to submit numerous studies examining the toxicity of the pesticides to mammals and other non-target species, along with studies examining the fate (movement, degradation, metabolism) of pesticides in the environment.  As these studies form the basis for EPA’s regulatory decisions, they must be independently evaluated to ensure that they are scientifically sound and conducted in accordance with current regulatory standards.  CSS scientists provide EPA and independent and unbiased review of this data.

CSS Innovations and Contributions: 

For more than 35 years covering multiple concurrent contracts, CSS scientists have supported EPA/OPP in the review and evaluation of the wide array of studies supporting pesticide registrations.   To support human health risk assessments, our scientists review and evaluate studies pertaining to pesticide toxicity in model mammalian species in order to estimate potential toxicity to humans.  These studies include both short- and long-term studies examining general toxicity, potential carcinogenicity, and reproductive effects.  We evaluate studies examining potential pesticide residues in food and livestock commodities that serve as the basis of establishing allowable tolerances and estimating dietary exposure. To support environmental risk assessments, we also review studies examining toxicity to non-target plant and animal species, as well as, the movement and fate of pesticides in the environment.   For all these reviews, our scientist prepare concise reports evaluating the study’s procedures, results and conclusions, and its adequacy in fulfilling regulatory requirements.

Key Technical Services

  • Evaluation of pesticide residues in food/feed crops and livestock
  • Evaluation of mammalian toxicity data for pesticides
  • Determination of critical end-points, NOAELs and LOAELs (no- and lowest-observed adverse effect level), RfDs and RfCs (acceptable reference doses and concentrations), and cancer values
  • Risk assessment and Weight of Evidence (WoE) analyses.
  • Evaluation of chemical toxicity to non-target species
  • Movement, metabolism, and degradation of pesticides in the environment
  • Evaluation of regulatory compliance and quality assurance

Additional Projects

HABs Interagency Research and Action Plans

Our scientists helped set the standard for coordinated research and action to reduce the impacts of HABs.

Cleaning Up the National Anthrax Attack

Challenge CSS working alongside of the U. S. Centers for Disease Control characterized the extent of building contamination and subsequently determined that the entire 100,000 foot building and contents would need to be decontaminated. A novel method needed to be developed and implemented for cleaning the massive number of mail pouches, packages and artifacts destined…

Bureau of Engraving and Printing (BEP) ES&H Support

CSS provided on-site environmental, safety, and health support 24 hours per day/five days per week to support approximately 1,900 employees occupying 1.4 million square feet of floor space at BEP’s Washington, DC, facility (DCF).

Human Health Risk Assessment

We help advance the understanding of chemical effects on people and the environment.

IT Services

Our IT solutions meet clients’ evolving needs.

Satellite Science & Environmental Intelligence

Helping create a more environmentally sustainable, weather-ready, and secure nation through application of earth observation data  

Space Science Application Support & Operations

We deliver scientific support to advance our clients’ research goals.

Emergency Preparedness & Response

We help our clients prepare for and protect the health and environment of communities after disasters and hazmat releases.

Environmental Resource Assessment & Management

We apply science to address challenges affecting the nation’s natural resources.

Facilities Operations & Maintenance

We understand your facility support needs and deliver customized solutions.

Get in touch

Contact us to learn more about our projects, capabilities, solutions, and service offerings.