2013 Session: 533

• Impact of Stormwater Pipe Lining Materials on Water Quality: Field Study and Resulting Specifications
  Abstract: As many stormwater pipes and culverts have reached the end of their service life, their repair or replacement is a large maintenance concern. Many commonly used culvert rehabilitation technologies entail the use of a resin or coating that cures to form a rigid liner within the damaged culvert. However, water quality implications of these trenchless alternatives are not completely understood. A previous evaluation conducted by the Virginia Center for Transportation Innovation and Research discovered that installations of conventional (styrene-based) cured-in-place pipe (CIPP) can impact water quality. These findings led to the development of rigorous specifications by the Virginia Department of Transporation and other agencies to prevent such impacts. The study reported herein included a determination of potential water quality impacts from two unconventional CIPP technologies and two spray-on lining technologies: epoxy-based (styrene-free) CIPP, styrene-based ultraviolet CIPP, a cementitious spray-on liner, and a polyurea spray-on liner. Several field installation sites were monitored and water quality tests were conducted on each newly installed liner. Water samples were analyzed for water quality indicators and product constituents, and sampling results were compared against regulatory standards and published aquatic species toxicity criteria. Results indicate that contaminants were released from each tested liner, but for some liners, water flow, dilution, and volatilization appeared to play an important role in reducing impacts on water quality. Recommendations for specifications include protective controls to prevent exceeding water quality standards or aquatic species toxicity thresholds, particularly in receiving waters with low flow and little dilution potential.
  Authors: Donaldson, Bridget; Whelton, Andrew
  Authors: Donaldson, Bridget; Whelton, Andrew
  Year: 2013
  Document Type: Paper
  Subject: Environment; Maintenance and Preservation
  Session: 533
  Paper Number: 13-4148
  Practice-Ready: Yes
• Analysis of Pathogen Destruction and Leachate Constituents in Deer Mortality Static Windrow Composting
  Abstract: Approximately 1.1 million deer-vehicle collisions occur in the United States each year. The predominant methods of disposing of these carcasses (landfill and burial) have several costly disadvantages, including long travel distances to landfills, increasing landfill restrictions, and lack of viable burial areas. Some states have found static compost windrows to be an easy and cost-effective carcass management technique.In this study, deer mortality static compost windrows were monitored for 1 year. Windrows were analyzed for pathogen destruction and the degree to which underlying soil filtered leachate contaminants. In response to high windrow temperatures, indicator pathogens E. coli and Salmonella were reduced by 99.99% the first sampling day (Day 7) and ascarids were deemed non-viable by Day 77. Soil filtration of leachate was effective in reducing concentrations of ammonia, chloride, and total organic carbon. Nitrate, a contaminant of particular regulatory concern, had an estimated mass contaminant loss of 1.9 lb/acre, compared to the estimated 8 to 45 lb/acre loss from fertilizer application on agronomic crops in Virginia. Results of this study indicate that with properly constructed static compost windrows, (1) high temperatures destroy indicator pathogens; (2) the natural filtration of leachate through soil reduces deer mortality contaminant concentrations; and (3) the low volume of leachate from windrows results in nominal losses of nitrate and other contaminants. These results will be useful for compost regulators and entities interested in incorporating this practice into regular operations.
  Authors: Donaldson, Bridget
  Authors: Donaldson, Bridget
  Year: 2013
  Document Type: Paper
  Subject: Environment; Maintenance and Preservation
  Session: 533
  Paper Number: 13-1221
• Analysis of Pathogen Destruction and Leachate Constituents in Deer Mortality Static Windrow Composting
  Authors: Donaldson, Bridget
  Authors: Donaldson, Bridget
  Year: 2013
  Document Type: Presentation
  Subject: AICP Certification Maintenance Session; Environment; Maintenance and Preservation
  Session: 533
  Paper Number: 13-1221
• Impact of Stormwater Pipe Lining Materials on Water Quality: Field Study and Resulting Specifications
  Authors: Donaldson, Bridget
  Authors: Donaldson, Bridget
  Year: 2013
  Document Type: Presentation
  Subject: AICP Certification Maintenance Session; Environment; Maintenance and Preservation
  Session: 533
  Paper Number: 13-4148
• Maintenance Meets Sustainability: Best Practices for Recently Completed NCHRP Project 25-25/Task 73 Study on Improved Environmental Performance of Highway Maintenance
  Authors: McVoy, Gary
  Authors: McVoy, Gary
  Year: 2013
  Document Type: Presentation
  Subject: AICP Certification Maintenance Session; Environment; Maintenance and Preservation
  Session: 533
  Paper Number: P13-6706
• Case Study: Former DOT Disposal Pit – From Discovery to Final Approach
  Authors: Anderson, Diane
  Authors: Anderson, Diane
  Year: 2013
  Document Type: Presentation
  Subject: AICP Certification Maintenance Session; Environment; Maintenance and Preservation
  Session: 533
  Paper Number: P13-7057