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Modified Procedure <br /> Results of U.S. EPA Standard Evaluation <br /> Liquid-Phase 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 Evaluation Leak Detection Methods: <br /> Liquid-Phase Out-of-tank Liquid Product Detectors". The modifications to the procedure were <br /> made to accommodate the specialized requirements of interstitial monitors. <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 make <br /> sure this form satisfies their requirements. <br /> Method Description <br /> Name Discriminating Dispenser Pan and Containment Sump Sensors <br /> Version number 794380-322 794380-352 <br /> Vendor Veeder Root Environmental Products <br /> 125 Powder Forest Drive P O Box 2003 <br /> (street address) <br /> Simsbury CT 06070-2003 (203) 651-2700 <br /> (city) (state) (zip) (phone) <br /> Detector output type: ( ) Quantitative (x) Qualitative <br /> Detector operating principle: ()Electrical Conductivity() Thermal Conductivity O Interface Probe <br /> (X)Product Permeable ( )Product Soluble (3Q Other reed switch/float <br /> Detector sampling frequency ( )Intermittent (} ) Continuous <br /> Evaluation Results <br /> The detectors listed above were tested for their ability to detect a layer of liquid (hydrocarbon or <br /> water) in a tank or a sump. The following parameters were determined: <br /> Lower Detection Limit - The smallest product thickness that the detector can reliably detect. <br /> Specificity - Whether or not the sensor responds to various products. <br /> Precision - Agreement between multiple measurements of the same product level <br /> Detection Time - Amount of time the detector must be exposed to product before it responds. <br /> Liquid-Phase Product Detector-Modified Results Form Page 1 of 4 <br />