Vapor mitigation system, vapor mitigation controller and methods of controlling vapors
First Claim
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1. A vapor mitigation system comprising:
- at least one vacuum pipe configured to collect vapors from a sub slab environment beneath a building and to vent the vapors;
a contaminate sensor configured to determine a concentration of a contaminant within the vapors collected within the at least one vacuum pipe;
a blower coupled to the at least one vacuum pipe, the blower configured to create a vacuum in the sub slab environment relative to ambient pressure within the building;
a fresh air inlet pipe that provides outside air to the sub slab environment;
a valve that dynamically limits a flow of outside air to the sub slab environment through the fresh air inlet pipe; and
a controller in communication with the blower, the contaminant sensor, and the valve, the controller being configured to dynamically control the valve to limit the flow of outside dilution air to the sub slab environment based on the concentration of the contaminant in the vacuum pipe, wherein the dynamic control of the valve comprises, responsive to the contaminant sensor determining that the concentration of the contaminant within the vacuum pipe exceeds a predetermined threshold level, providing a signal to temporarily open the valve to permit the flow of outside dilution air to the sub slab environment.
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Abstract
A vapor mitigation system includes at least one vacuum pipe configured to collect vapors beneath a floor of a building, and a blower coupled to the at least one vacuum pipe. The blower is configured to create a vacuum under the floor of the building. The vapor mitigation system includes a controller configured to control a speed of the blower. The controller adjusts the speed of the blower in response to a level of vacuum created under the floor of the building.
9 Citations
20 Claims
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1. A vapor mitigation system comprising:
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at least one vacuum pipe configured to collect vapors from a sub slab environment beneath a building and to vent the vapors; a contaminate sensor configured to determine a concentration of a contaminant within the vapors collected within the at least one vacuum pipe; a blower coupled to the at least one vacuum pipe, the blower configured to create a vacuum in the sub slab environment relative to ambient pressure within the building; a fresh air inlet pipe that provides outside air to the sub slab environment; a valve that dynamically limits a flow of outside air to the sub slab environment through the fresh air inlet pipe; and a controller in communication with the blower, the contaminant sensor, and the valve, the controller being configured to dynamically control the valve to limit the flow of outside dilution air to the sub slab environment based on the concentration of the contaminant in the vacuum pipe, wherein the dynamic control of the valve comprises, responsive to the contaminant sensor determining that the concentration of the contaminant within the vacuum pipe exceeds a predetermined threshold level, providing a signal to temporarily open the valve to permit the flow of outside dilution air to the sub slab environment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A vapor mitigation system comprising:
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a blower coupled to at least one vacuum pipe, the blower configured to extract vapor from a sub slab environment beneath a building and to vent the vapors through the at least one vacuum pipe; a mass air flow sensor coupled to the at least one vacuum pipe, the mass air flow sensor configured to measure a level of mass flowrate of vapor extracted from the sub slab environment; a contaminant sensor coupled to the at least one vacuum pipe, the contaminant sensor configured to measure a level of contaminant in the vapor extracted from the sub slab environment; a valve that dynamically limits a flow of outside air to the sub slab environment through the fresh air inlet pipe; and a controller in communication with the blower, the mass air flow sensor, the contaminant sensor, and the valve, the controller being configured to;
i) calculate an amount of contaminant extracted from the sub slab environment; and
ii) dynamically control the valve to limit the flow of outside dilution air to the sub slab environment based on the concentration of the contaminant in the vapor extracted from the sub slab environment, wherein the dynamic control of the valve comprises, responsive to the contaminant sensor determining that the concentration of the contaminant the vapor extracted from the sub slab environment exceeds a predetermined threshold level, providing a signal to temporarily open the valve to permit the flow of outside dilution air to the sub slab environment. - View Dependent Claims (17, 18, 19)
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20. A vapor mitigation system, comprising:
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a blower coupled to at least one vacuum pipe, the blower configured to extract vapor from a sub slab environment beneath a building; a mass air flow sensor coupled to the at least one vacuum pipe, the mass air flow sensor configured to measure a mass flowrate of vapor extracted from the sub slab environment; a contaminant sensor coupled to the at least one vacuum pipe, the contaminant sensor configured to measure a level of contaminant in the vapor extracted from the sub slab environment; a fresh air inlet pipe that provides outside air to the sub slab environment a valve that dynamically limits a flow of outside air to the sub slab environment through the fresh air inlet pipe; and a controller in communication with the blower, the mass air flow sensor, the contaminant sensor, and the valve, the controller being configured to;
i) adjust a speed of the blower so that the mass flowrate of vapor extracted from the sub slab environment remains substantially constant; and
ii) dynamically control the valve to limit the flow of outside dilution air to the sub slab environment based on the concentration of the contaminant in the vapor extracted from the sub slab environment, wherein the dynamic control of the valve comprises, responsive to the contaminant sensor determining that the concentration of the contaminant the vapor extracted from the sub slab environment exceeds a predetermined threshold level, providing a signal to temporarily open the valve to permit the flow of outside dilution air to the sub slab environment.
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Specification