The growing U.S. trade imbalance with China, and alleged Chinese unfair trade practices, have become of major concern to many U.S. policymakers. Over the past few years, the U.S. trade deficit with China has grown at a faster rate than that of any other major U.S. trading partner. In 1993, the U.S. trade deficit with China totalled $22.8 billion, the second largest U.S. bilateral trade imbalance after Japan. Many trade analysts have attributed the growing U.S.-China trade deficit to a variety of Chinese restrictive trade practices. Other areas of concern to the United States have included China's alleged violation of U.S. intellectual property rights, transshipments of textiles to the United States in violation of U.S. textile quotas, and China's alleged use of forced labor for products exported to the United States.

On May 19, 1994, the Senate passed, by a vote of 95 to 3, S. 2019, the Safe Drinking Water Act Amendments of 1994, a comprehensive proposal to reauthorize and amend the Safe Drinking Water Act (SDWA). During floor debate on the bill, the Senate considered numerous amendments, many of which were adopted. This report summarizes selected provisions of S. 2019, as passed.

Vertical gas motions induced by barometric pressure variations can carry radioactive gases out of the rubblized region produced by an underground nuclear explosion, through overburden rock, into the atmosphere. To better quantify transit time and amount of transport, field experiments were conducted at two sites on Pahute Mesa, Kapelli and Tierra, where radioactive gases had been earlier detected in surface cracks. At each site, two tracer gases were injected into the rubblized chimney 300-400 m beneath the surface and their arrival was monitored by concentration measurements in gas samples extracted from shallow collection holes. The first ``active`` tracer was driven by a large quantity of injected air; the second ``passive`` tracer was introduced with minimal gas drive to observe the natural transport by barometric pumping. Kapelli was injected in the fall of 1990, followed by Tierra in the fall of 1991. Data was collected at both sites through the summer of 1993. At both sites, no surface arrival of tracer was observed during the active phase of the experiment despite the injection of several million cubic feet of air, suggesting that cavity pressurization is likely to induce horizontal transport along high permeability layers rather than vertical transport to the surface. …