Characterize the Contaminant and Develop Preventive Action Plan
It may be necessary for the prime construction contractor
or TxDOT to hire a consultant to identify and characterize the contamination
through sampling and analytical testing. The objectives of the consultant's
investigation include:
- Determining characteristics of the soil, groundwater and vapor, including groundwater recovery rates, vertical/horizontal extent of contamination, and chemicals of concern
- Assessing worker safety and public exposure concerns
- Determining handling and/or disposal requirements for any contaminated media unearthed during the construction process
- Recommending a preventive action plan to ensure the problem is not aggravated and to avoid or minimize TxDOT liability
- Determining necessary requirements to allow the prime construction contractor to resume work following suspension.
Consultants may also develop specifications to complete portions
of the construction within contaminated environments. Data obtained
from the investigation will enable the consultant to develop specifications
related to groundwater treatment or filtration systems, ventilation
systems, ongoing site monitoring, contaminated material disposal/reuse
options, and permitting. Environmental consultants can be procured
through the statewide engineering program administered by the Professional
Engineering Procurement Services (PEPS) Division. Alternatively,
established environmental engineering and scientific services contracts
can be utilized through the ENV Division.