Publisher's Synopsis
Excerpt from Field Investigation of the Natural Gas Pipeline Accident at Canterbury Woods, Annandale, Virginia
On the morning of March 24, 1972, in Annandale, Virginia, two homes were destroyed and a third home damaged by gas explosions and fires resulting from a construction accident that caused the gas main leak. The National Transportation Safety Board was responsible for investigating this accident and requested that the National Bureau of Standards assist them with their investigation by conducting a field test at the accident site. The objective of the test was to determine how the natural gas entered the homes and the paths the gas followed from the leak to the homes. The premise of the nbs test was that if an air - tracer mixture could be detected at locations where natural gas was known to have escaped, then the original underground gas paths may still exist. A detailed test plan was developed to determine gas escape locations and paths. This plan included a simulation of the underground gas move ment, excavation of various utility trenches, soil tests, and dismantling of the foundation wall of one of the destroyed homes. The equipment used to introduce the tracer into the ground near the original leak consisted of an air compressor, a tracer source (refrigerant R air flow measuring, piping and control valves. Electronic catalytic leak detectors were used to detect the tracer in homes and elsewhere on the test site. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
