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

Audit and Inspection Support for the National Institute of Environmental Health Sciences (NIEHS)

For more than 35 years, CSS has provided quality control assessment support to the National Toxicology Program (NTP) on studies relating to the toxicological effects of chemicals in the environment.

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.

Development support of NOAA/NOA OceanReports

CSS’s Team helped create the OceanReports web-based tool that assists in the analysis of coastal and marine resources for commerce, development, and conservation.

IT Services

Our IT solutions meet clients’ evolving needs.

Environmental Resource Assessment & Management

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

Human Health Risk Assessment

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

Satellite Data Applications

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

Earth & Space Science Support & Operations

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

Safety, Health, & Environmental

We provide our clients with tools to protect their workforce, the public, and the environment.

Emergency Preparedness & Response

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

Get in touch

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