STATEMENT OF QUALIFICATIONS – SEDIMENT ENVIRONMENTS
The Provectus Way – That Works.
Provectus Environmental Products, Inc. has teamed with recognized experts to strategically manage sediment environments via specialized assessment, predictive analysis, and – where appropriate – remedial design support and implementation oversite. Each member of our Team has over 25 years’ relevant experience and has documented scientific authority in their fields of expertise. Working in collaboration with RPs, environmental engineers, technical consultants, governmental regulators, and the wider academic community we provide scientifically valid, defensible, and cost-effective management strategies for even the most complex, challenging sites.
Members of Provectus’ Sediment Management Team (Appendix A) and colleagues have worked together for almost 30 years. We have collaborated on dozens of sites around the world for both the public and private sectors. Our projects have included very large, very complex and exceedingly challenging sites involving multiple (international) parties. Projects and publications selected in Appendices B and C highlight this diverse expertise.
Using a variety of analytical tools (several of which we have developed over the past decades), our Project Team can provide defensible and highly accurate information on:
We can support the development of Field Activity Plans by providing technical writing, sampling plans, analytical protocols, etc. We can assist with sample acquisition and related field work. We offer data interpretation and (statistical) analysis. When needed, we help present data in a clear and concise manner.
Remedial Technologies – Technical Resources
A range of remedial strategies have been designed and/or implemented in collaboration with site consultants. Where applicable, the Provectus line of environmental remediation products are available. These offer some truly unique chemistries focused on safety, tangible cost efficiencies, demonstrated effectiveness, distinguishable ease of use, and recognizable quality at the highest level.
Project Examples – Case Studies
Ambient polycyclic aromatic hydrocarbon (PAH) concentrations are often measured in estuarine sediments to evaluate risk of those chemicals to benthic infauna and adjacent ecosystems. Typical site investigations assume that PAHs are present in the sediment because of historical contamination despite overwhelming evidence of the dynamic nature of contaminants and associated sediment transport in estuaries. Although many processes may affect PAH
Evaluating in situ biodegradation of organic contaminants requires an efficient, precise, and cost-effective monitoring strategy. Predicting environmental remediation time scales requires understanding contaminant turnover with respect to additional source introduction, contaminant transport and (bio) degradation. Multiple sources and their mixing may complicate remedial actions at many subsurface fuel-contaminated sites. Anthropogenic organic compound turnover depends on organic contaminant availability and inherent lability, nutrient availability, natural organic carbon concentrations, and seasonal physicochemical variability. Thus, defining the parameters necessary to substantiate natural attenuation is difficult and not without uncertainty.
Stable carbon and radiocarbon isotope analysis (δ13C and ∆14C, respectively) have been extensively used to assess basic biogeochemical roles in natural carbon cycling. More recently, stable carbon isotope analysis has been applied to identify contaminant carbon as well as biodegradation byproducts and residual contamination. Stable isotope techniques have also been applied to field settings by analyzing fractionation factors, addition of stable isotope labeled tracers, and evaluating efficacy of active bioremediation strategies through monitoring production of contaminant-derived CO2. In addition, as a biomarker approach, bacterial nucleic acid stable carbon isotopes were analyzed from beaches contaminated with oil from the Valdez oil spill to confirm bacterial hydrocarbon biodegradation in Prince William Sound, Alaska. Aside from measuring fractionation factor(s) of residual contaminant pools, monitoring hydrocarbon biodegradation respiration products (e.g., CH4 and CO2) to confirm biodegradation may require the least analytical effort. This strategy has been applied to groundwater and vadose zone gases.
A variety of relevant projects are outlined in Appendix B. These projects document our ability to save significant time and money by assisting with:
Representative example projects are summarized below: