Environmental Impact of Construction and Repair Materials on Surface and GroundWaters. Summary of Methodology, Laboratory Results, and Model Development

摘要

This report concisely summarizes the research conducted in NCHRP Project 25-09 todevelop a new testing technology to realistically estimate how conventional, recycled, or waste highway construction and repair materials may affect surface and ground waters in environments surrounding highway rights-of-way. The methodology involves fairly simple, standard aquatic toxicity screening tests that may lead to more detailed laboratory evaluation tests, and a computer model that uses the test results in computing the concentrations and loads of mobile toxicants at the highway site boundary. A knowledge base containing the results of aquatic toxicity and chemistry tests is a part of this methodology; it provides a ready means to compile relevant data and thus avoids unnecessary, duplicative laboratory testing.