Abstract: A time-based audio verification system used to verify the correct installation of an audio system in a vehicle is based on the principle that the distances between a pick-up microphone and each speaker within the vehicle are different. Sound travels at a constant rate, and the wave is measured that provides the time it takes the sound emanating from each speaker to travel to the microphone. Once it is determined where in the wave each speaker is located, the presence of each speaker in the vehicle can be determined. Additionally, the level of each speaker in the curve can be analyzed to determine individual speaker output quality.

Abstract: An apparatus and method for sampling sub-surface soil gas samples and detection of distinctive chemical tracer compounds in the soil gas samples employing an aboveground sampling apparatus. The aboveground sampling apparatus does not include any device that penetrates the soil surface or man-made structures imposed upon the soil surface. Rather, the above-ground sampling apparatus evacuates soil gas samples through the soils surface or through mad-made structures imposed upon the soil surface, such as asphalt or concrete, and passes the soil gas sample through an adsorbent bed containing adsorbent material specific for the distinctive chemical tracer compounds.

Abstract: An apparatus and method for sampling sub-surface soil gas samples and detection of distinctive chemical tracer compounds in the soil gas samples employing an aboveground sampling apparatus. The aboveground sampling apparatus does not include any device that penetrates the soil surface or man-made structures imposed upon the soil surface. Rather, the above-ground sampling apparatus evacuates soil gas samples through the soils surface or through mad-made structures imposed upon the soil surface, such as asphalt or concrete, and passes the soil gas sample through an adsorbent bed containing adsorbent material specific for the distinctive chemical tracer compounds.

Abstract: A time-based audio verification system used to verify the correct installation of an audio system in a vehicle is based on the principle that the distances between a pick-up microphone and each speaker within the vehicle are different. Sound travels at a constant rate, and the wave is measured that provides the time it takes the sound emanating from each speaker to travel to the microphone. Once it is determined where in the wave each speaker is located, the presence of each speaker in the vehicle can be determined. Additionally, the level of each speaker in the curve can be analyzed to determine individual speaker output quality.

Abstract: A system for automated soil gas sampling, analysis and reporting to determine the presence and magnitude of a fluid leak from fluid storage vessels by detecting the presence of a unique and identifiable tracer chemical in the fluid leak. The system includes an array of sampling probes disposed in earthen material supporting fluid storage vessels. Each of the sampling probes is connected to a first valve selectable between individual sampling probes in the array. The first valve is connected to a second valve which communicates a gas sample from the first valve to a sample loop and loads the gas sample into the sample loop. Switching of the second valve from the first valve to a carrier gas source introduces a pressurized carrier gas into the sample loop displacing the gas sample out of the sample loop and into a gas chromatograph for analysis.

Abstract: An apparatus and method for detecting fluid leaks from aboveground fluid storage tanks is disclosed. The invention consists of radially disposing a plurality sample probes in the subsurface soil area underneath the aboveground tank. Each of the plurality of sample probes are connected to a vacuum pump and a sampling port to collect the soil gasses drawn from the subsurface soil area. At least one air injection probe is disposed in the subsurface soil area and extends underneath the aboveground tank to an approximate center point of the tank circumference. The volatile liquid phase tracer is mixed with the fluid in the tank, and soil gas samples are evacuated through the subsurface soil area underneath the tank into the sample probes, collected and analyzed for the presence of the gas phase tracer.

Abstract: An apparatus and method for detecting leaks in underground fluid pipes. Detection of a leak is achieved by introducing a liquid phase tracer into the fluid within the underground pipe, which volatilzes to a gas phase when the fluid leaks from the underground fluid pipe. A permeable tube is buried in the soil in a position above an underground fluid transfer pipe. At least one end of the permeable tube is terminated in a recess vault for access to the end of the permeable tube and sampling soil gases from the permeable tube. Should any fluid leak occur in the underground fluid transfer pipe, the escaping tracer escapes in liquid form and, upon encountering free air in the subsurface soil, vaporizes to the gas phase and diffuses through the soil surrounding the underground fluid transfer pipe and into the permeable tube for collection and analysis.

Abstract: A method and apparatus for the rapid detection and pinpoint location of leaks in one or more of a plurality of subsurface fluid storage tanks. A quantity of tracer material such as a fluorinated halocarbon compound is mixed with fluids in each of the plurality of underground storage tanks. A first subsurface vapor pipe or conduit having an above-surface air inlet and a plurality of apertures therein is positioned in the backfill within the vicinity of the tanks and the above-surface inlet is used for conducting, drawing or sucking air into the air inlet pipe. A second subsurface sample or collection pipe having an above-surface pipe outlet and a plurality of apertures therein is also positioned in the vicinity of the tanks into the backfill. Air drawn down into the vapor pipe passes through the backfill and past a plurality of storage tanks and in close proximity thereto, and into the sample pipe. Any tracer which is leaking from the tank or tanks will be picked up and drawn into the sample pipe.

Abstract: An apparatus and method for detecting leaks from underground gasoline storage tanks and the like by routine or periodic soil samples tested for a particular tracer. A fluorinated halocarbon compound tracer having a boiling point less than that of gasoline is slowly dispensed within the gasoline, natural gas, or the like in the tank. A sampling pipe having a plurality of apertures therein is also buried in selected locations in the vicinity of the tank, and samples of the soil gas are pumped from the pipe and supplied to a Nafion water separator prior to analysis by gas chromatographic techniques. If a leak in the tank should occur, the tracer will exit with the leaking gasoline, quickly vaporize, and travel rapidly by molecular diffusion in all directions. Elements of the tracer will therefore be detected in the soil gas pumped from the sample pipe using standard gas chromatography techniques, indicating that a leak exists in the tank.