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.

Personnel Resources

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.

Services Offered

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:

  • Fingerprinting Contaminant Source(s)
  • Contaminant Transport & Residence Time
  • Natural & Enhanced (Bio)degradation of Contaminants
  • Spatial Variation of Contaminant Capacity for Accumulation vs. Degradation
  • Differentiation from Background Concentrations
  • Determination of Modern vs. Historic Anthropogenic Contributions

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.

  • Provect-CH4® Methanogen Inhibitor and ERD/ISCR Supplement: Water-soluble amendment that can be used as a supplement to effectively control methane production.
  • Provect-IR® Solid, Antimethanogenic ISCR Reagent: Unique combination of carbon + ZVI + AMR technology to treat halogenated compounds.
  • Provect-IRM® Solid Antimethanogenic ISCR Reagent / Metal Stabilization Reagent: The Provect ISCR technology core makes this a more effective means of metal immobilization/ISCR that minimizes production of methylmetal(loids) for safer, more effective, long-term immobilization.
  • Provect-OX® Self-Activating ISCO/ Enhanced Bioremediation Reagent: Persulfatebased ISCO reagent that is unique in terms of its safety (no extreme activators; no heat generated) and effectiveness, as it actively integrates enhanced bioremediation as part of the overall treatment process – only ISCO reagent designed to manage rebound.
  • AquaGate+CH4™ Composite, Antimethanogenic Reactive Capping Technology: Developed in collaboration with AquaBlok, LTD subaqueous caps can be constructed more effectively by minimizing gas ebullition and contaminant methylation.
  • Provect-GS™ NAPL Immobilization Technology: A liquid reagent developed in collaboration Beazer East, Inc. for in situ geophysicochemical immobilization (ISGI) of DNAPL sources.
  • Compound-Specific Stable Isotope Analysis: An accurate, cost effective method to identify organic and inorganic compound sources and fate.
  • Radiocarbon Isotope Analysis: A forensic tool that confirms in situ organic compound degradation.
  • Mineralization and Microbial Production Assays: Microbial contaminant utilization and overall microbial growth rate measurements using short incubations. Represents specific organic compound biodegradation in sediments or water column and its relevance to total microbial carbon and energy demand, providing thorough assessment of the compound of interest residence time.

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
concentration, we typically focus on two that are most likely to have to largest impact on PAH flux in the sediment; i) influx of PAH associated with settling water column particles, and ii) bacterial contaminant degradation in surface sediments. Our Team Members have developed several of the most advanced analytical tools and procedures to conclusively define and quantify these values. These evaluations equip site managers and regulators with valuable decision-making tools for ecological risk reduction due to intrinsic bioremediation relative to engineering solutions, such as remedial dredging. This focus has transitioned to capability to address chlorinated and nitroaromatic compounds.

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:

  • Proper delineation of areas of interest
  • Accurate assessment of transport processes for nonpoint-source contaminant loading
  • Prediction of the natural in situ degradation of the contaminant
  • Performance monitoring post remedial action
    • Representative example projects are summarized below:

    • NAVFAC, San Diego California: Assessment of natural attenuation of PAH loading to sediments near San Diego Naval Air Station and through the urbanized water way.
    • NAVFAC, Charleston Navy Yard, South Carolina: Sediment PAH source and natural attenuation within and adjacent to the Charleston Naval Ship Yard in the Cooper River.
    • NAVFAC, Philadelphia Navy Yard Reserve Basin: PAH-impacted sediment transport and source assessment.
    • Latvian Harbor Remediation Liepaja Latvia: Harbor sediment contaminant source assessment and natural attenuation for economic free trade zone development.
    • NAVFAC, Norfolk, Virginia: Hydrocarbon source discrimination using CSIA and multivariate statistics.
    • NAVFAC, Norfolk, Virginia: Radiocarbon natural abundance application for confirmation of organic compound degradation.

    • Contact us today at (815) 650-2230 or email us info@provectusenv.com. Or fill out and submit our FREE site evaluation form. Download the Statement of Qualifications HERE.