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0 <br />0 <br />Results of U.S. EPA Standard Evaluation <br />Liquid -Phase Out -of -Tank Product Detectors <br />This form documents the performance of the liquid -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 />Liquid -Phase Out -of -Tank Product Detectors." <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 />VerslorL with Groundwater Sensor (Form ;ii=i. o- m v. <br />(street address) <br />state) (zip) (phone <br />Detector output type: Quantitative Qualitative <br />Detector operating principle: XElectrical Conductivity Thermal Conductivity <br />,_Interface Probe ,._Product Permeable _Product Soluble Other <br />Detector sampling frequency: _Intermittent Continuous <br />Evaluation Results <br />The detector described above was tested for its ability to detect a layer of liquid floating on water. <br />The following parameters were determined: <br />Accuracy - How closely the product thickness, as measured by the detector, agrees with the <br />actual thickness. <br />Bias - Whether the method consistently over-estimates or under -estimates product thickness. <br />Not applicable to qualitative detectors. <br />Precision - Agreement between multiple measurements of the same product thickness. Not <br />applicable to qualitative detectors. <br />Detection Time - Amount of time the detector must be exposed to product before it responds. <br />Fall Time - Amount of time that passes before the detector returns to its baseline reading after the <br />product is removed. <br />Lower Detection Limit - The smallest liquid concentration that the detector can reliably detect. To <br />meet federal performance standards, this must be less than 0.32 cm (1/8 inch). <br />Specificity - Indicates the accuracy of the detector in several different liquids. <br />Liquid -Phase Product Detector - Results Form Page 1 of 2 <br />