Our support of the EPA’s National Aquatic Resource Surveys (NARS) provides a significant example of our experience with the chemical analysis of water samplesNARS is a large collaborative program between EPA, states and tribes to conduct a statistically-based survey of the status of the nation’s waters.  The nation’s lakes, rivers and streams, wetlands and coastal waters are sampled iteratively over a five-year period.  Over forty-five states participate in the program.  The EPA generates an assessment report of the environmental condition of the water bodies sampled in a given year. The chemistry data we provide is a major component of that determination.  Key highlights of our support for NARS are included below.

  • Provided analytical chemistry support for NARS since its inception in 2007 and analyzed 850-1050 water samples a year for the program. 
  • Analyzed 12 to 23 chemical constituents annually depending on the water bodies being sampled in a particular year (e.g., coastal waters, lakes, rivers), including nitrate, nitrite and total phosphorus. 
  • Completed analyses following a strict schedule of sample hold times. 
  • Prepared comprehensive database of results and QC/QA data for the EPA.
  • Prepared and maintained an EPA-approved laboratory quality assurance plan and 20 EPA-approved SOPs.
  • Documented analytical performance for NARS work in annual updates of Data Quality Summary Report (DQSR)
  • Managed and cross-trained staff to meet analytical, sample load, and technical expertise requirements
  • Maintained staff competency based on results of multiple proficiency testing studies; peer review of calibration, sample, and QC data; and critique of control charts.

Additional Projects

Training for First Responders and Field Staff

CSS technical experts prepare and deliver essential training and information addressing worker safety and environmental hazards.

Quick Response Guides for Emergency Response

CSS prepares tactical, field, and quick response guides used by EPA OSCs and other first responders to address a wide range of contaminants.

Expert Guidance to EPA’s Consequence Management Advisory Division

Technical Support for EPA’s Consequence Management Advisory Division (CMAD) – CSS provides expert technical guidance and field support related to chemical, biological, radiological, and nuclear (CBRN) decontamination.

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Human Health Risk Assessment

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

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Satellite Data Applications

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.

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