238000009413 insulation Methods 0.000 claims description 5.238000005259 measurement Methods 0.000 claims description 6.239000003673 groundwater Substances 0.000 claims description 15.239000007924 injection Substances 0.000 claims abstract description 17.238000002347 injection Methods 0.000 claims abstract description 17.238000001514 detection method Methods 0.000 claims abstract description 17.
239000007788 liquid Substances 0.000 title claims abstract description 38.Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by NDE Environmental Corp filed Critical NDE Environmental Corp Priority to US07/833,681 priority Critical patent/US5295391A/en Application granted granted Critical Publication of US5295391A publication Critical patent/US5295391A/en Assigned to CIT GROUP/BUSINESS CREDIT, INC., THE reassignment CIT GROUP/BUSINESS CREDIT, INC., THE SECURITY AGREEMENT Assignors: TANKNOLOGY NDE CONSTRUCTION SERVICES, INC., TANKNOLOGY NDE CORPORATION, TANKNOLOGY-NDE INTERNATIONAL, INC. Original Assignee NDE Environmental Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jersey Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US07/833,681 Inventor John R.
Google Patents Method and apparatus for detecting leaks in the ullage of a liquid storage tankĭownload PDF Info Publication number US5295391A US5295391A US07/833,681 US83368192A US5295391A US 5295391 A US5295391 A US 5295391A US 83368192 A US83368192 A US 83368192A US 5295391 A US5295391 A US 5295391A Authority US United States Prior art keywords tank pressure test gas flow rate Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5295391A - Method and apparatus for detecting leaks in the ullage of a liquid storage tank US5295391A - Method and apparatus for detecting leaks in the ullage of a liquid storage tank
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