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0 <br />0 <br />Results of U.S. EPA Standard Evaluation <br />Vapor -Phase Out -of -Tank Product Detectors <br />This form documents the performance of the vapor -phase product detector described below. The <br />evaluation was conducted by the equipment manufacturer or a consultant to the manufacturer <br />according to the U.S. EPA's "Standard Test Procedure for Evaluating Leak Detection Methods: <br />Vapor -Phase Out -of -Tants Product Detectors." 1 <br />Tank owners using this leak detection system should keep this form on file to prove compliance <br />with the federal regulations. Tank owners should check with state and local agencies to verify that <br />this form satisfies their requirements. <br />Method Description <br />Name 350 Series UST MonitodngBystems: <br />Models ILS 3.50 & TLS 350 <br />Version with Adsistor Vapor Sensor (Form no 794390-700) <br />Vendor Veeder-Root Environmental Products 125 Powder Forest Drive <br />(Street Address) <br />—_ Simsbury CT 06070-200 (20) 651-2700 <br />(City) <br />(State) (zip) <br />Detector output type: _,Quantitative _-__Qualitative <br />Detector operating principle: Metal Oxide Semiconductor <br />(Phone) <br />—K-Adsistor _Detector Tube <br />Catalytic Gas Sensor _Combustible Gas Detector _Photoionization Detector <br />—Product -Permeable Detector _IR Detector _Other <br />Detector sampling frequency: _Intermittent _Continuous <br />Evaluation Results <br />The detector described above was tested for its ability to detect known concentrations of test gas. <br />The following parameters were determined: <br />Accuracy - How closely test gas concentration, as measured by the detector, agrees with the <br />actual gas concentration. <br />Bias - Whether the method consistently over-estimates or under -estimates gas concentration. <br />Not applicable to qualitative detectors. <br />Precision - Agreement between multiple measurements of the same gas concentration. Not <br />applicable to qualitative detectors. <br />Detection Time - Amount of time the detector must be exposed to test gas before it responds. <br />Fall Time - Amount of time that passes before the detector returns to its baseline reading after <br />test gas is removed. <br />Lower Detection Limit - The smallest gas concentration that the detector can reliably detect. <br />Specificity - Indicates the ability of the detector to detect several different test gases. <br />1 Radian Corporation. Development of Procedures to Assess the Performance of External Leak <br />Detection Devices: Vapor -Phase ASTM -Formatted methods. Draft Report. FPA Contract No. 68- <br />03-3409. Work Assignment 22. June 29,1990. [Gas concentrations levels were corrected for <br />laboratory temperature and pressure.] <br />Vapor -Phase Product Detector - Results Form Page 1 of 2 <br />