Our Senior Staff have over 60 years of combined experience in the fields of environmental toxicology, aquatic biology, environmental chemistry, and field monitoring and sampling. As a full service company, we have successfully performed a wide variety of environmental studies and testing programs for numerous and diverse clients. This has included NPDES testing, sediment evaluations, TIEs and TREs, dredge materials evaluations, research and testing of the fate and effects of metals, pesticides, and petroleum & petroleum products in the aquatic environment, and the monitoring of contaminants and toxicity in non-point source (e.g., agricultural discharges) and stormwater runoff. We have directed and managed numerous projects encompassing all of the standardized EPA and ASTM test procedures as well as projects involving development of new testing procedures. Performance of all of these projects has involved a leadership role by the PER scientists, from conception and design of experimental approach, through completion of studies and analyses of results, and finally, reporting of the results to the concerned parties.