Water quality implications of culvert repair options : vinyl ester based and ultraviolet cured-in-place pipe liners.

Details

• Creators:
  Donaldson, Bridget M.
• Corporate Creators:
  Virginia Center for Transportation Innovation and Research
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Culverts
  • Trenchless technology
  • Water quality
  • Cured in place pipe
  • Environmental impact analysis
  • Styrenes
  • Toxicity
  • Aquatic life
  • Culverts
  • Trenchless construction
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• Publication/ Report Number:
  FHWA/VCTIR 13-R2
• Resource Type:
  Tech Report
• Geographical Coverage:
  Virginia
• Edition:
  Final report.
• Corporate Publisher:
  Virginia Center for Transportation Innovation and Research
• Abstract:
  Specifications of the Virginia Department of Transportation (VDOT) allow for the use of several “trenchless” pipe or ; culvert repair technologies whereby existing underground culverts are repaired in place rather than by the use of the conventional ; method of unearthing and replacing damaged sections. However, water quality implications of these trenchless alternatives are ; not completely understood. A previous evaluation found water quality impacts from installations of conventional cured-in-place ; pipe (CIPP). This trenchless rehabilitation technology includes saturating a flexible liner with a styrene-based resin and curing ; the liner onsite with steam or hot water. VDOT subsequently implemented new specifications for styrene-based CIPP to prevent ; water quality impacts from its installation or use. The current study included an environmental evaluation of two unconventional ; CIPP technologies available for use by VDOT: vinyl ester based (styrene-free) CIPP and styrene-based ultraviolet (UV) CIPP. ; To evaluate the potential for vinyl ester based and UV CIPP technologies to impact water quality, water samples were ; collected from field installations and simulations for up to 120 days. Samples were analyzed for product constituents listed in ; material safety data sheets. Results were then compared with established regulatory standards and published toxicity criteria for ; aquatic species. ; For the vinyl ester based CIPP liner evaluated, concentrations of the primary resin constituent exceeded toxicity ; thresholds for aquatic species in six subsequent water sampling events. Adherence to VDOT’s CIPP specifications for styrenebased ; liners is expected to minimize contaminant leaching from the installation and use of this product. Following UV CIPP ; installations, no water quality impacts were documented from culvert outlets with water flow but styrene concentrations ; following one of the installations exceeded toxicity thresholds for aquatic species in standing water. ; The study recommends that VDOT consider revising its current CIPP specifications such that styrene-based CIPP ; requirements also apply to non–styrene-based CIPP installations. Because the water quality evaluations conducted in this study ; could not capture the range of potential field scenarios and installation variables, the VDOT specification that requires the ; collection and analyses of water and soil samples following CIPP installations would provide VDOT with additional sampling ; results from liners installed in varying field conditions and help ensure that VDOT is using this lining technology with ; appropriate environmental safeguards.
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• Format:
  PDF
• Funding:
  98482
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25373/dot_25373_DS1.pdf
• File Type:
  [PDF - 379.31 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:6dbc2a7e6e6a80103a0053b7812c87495a57f445a0512b5246ad6bc2f57739890fab541c9b34621d5601b02736b4b28b2c884b761208745fbe9f4028fecf78a9