KENNETH R MASER
Engineering in Arlington, MA
License number
Massachusetts 31834
Issued Date
Jul 27, 1984
Expiration Date
Jun 30, 2018
Type
Structural Engineer
Address
Address
Arlington, MA 02476
Professional information
Leakage Test For Liquid Containment
US Patent:
4697456, Oct 6, 1987
Filed:
Oct 2, 1986
Appl. No.:
6/914348
Inventors:
Kenneth R. Maser - Arlington MA
International Classification:
G01M 324, G01N 2904
US Classification:
73592
Abstract:
A method for detecting leakage from an in-ground liquid containment having a nominally impermeable floor, wherein a source emits a burst and a row of sensors are placed on an opposing side of the containment to receive boundary wave energy transmitted along the containment floor. Traces from the sensors show a regular pattern of boundary wave amplitude or arrival time, with irregularities indicative of regions of floor defects. The sensors each receive energy propagated along a strip radiating from the source. To locate leakage, the method is repeated with source and sensors oriented across a second direction. Irregularities in first and second crossing strips indicate a defect located in the region of intersection of the two strips. Power spectrum analysis of the traces identifies particular types of floor defects, and baseline measurements correct for natural subterranean features.