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t e3 '97 14:14 FROM DER—ROOT SERVICE 10 91 ?b59908 PAGE.002/005 Modified Procedure Results of U.S. EPA Standard Evaluation Liquid -Phase Product Detectors This form documents the performance of the liquid -phase product detector described below. The evaluation was conducted by the equipment manufacturer or a consultant to the manufacturer according to the U.S. EPA's "Standard Test Procedure for Evaluation Leak Detection Methods: Liquid -Phase Out -of -tank Liquid Product Detectors". The modifications to the procedure were made to accommodate the specialized requirements of interstitial monitors. Tank owners using this leak detection system should keep this form on file to prove compliance with the federal regulations. Tank owners should check with State and local agencies to make sure this form satisfies their re uirements. Method Description Name Di5crimin := Version number 79 380-322. 794380-352 -- Vendor Veeder Root Environment Produ=-_... _ .- -- 125 Pr F D .v B x _. (street address) 06070 2003 (?) 651-'7700 . __.. (city) (state) (zip) (phone) Detector output type: () Quantitative (x) Qualitative Detector operating principle: ( )Electrical Conductivity ( ) Thermal Conductivity (} Interface Probe (X) Product Permeable () Product Soluble (X) Other re%d switch/float Detector sam lin fro uene : Intermittent Continuous Evaluation Results The detectors Iisted above were tested for their ability to detect a layer of liquid (hydrocarbon or water) in a tank or a sump. The following parameters were determined: Lower Detection Limit - The smallest product thickness that the detector can reliably detect. Specificity - Whether or not the sensor responds to various products precision - Agreement between multiple measurements of the same product level Detection Time - Amount of time the detector must be exposed to product before it responds. YaZge to[ 4 ,,,.:,�_pb��e FteJnrt 1]ctectoc - Moai6ed R��s�1ts F'o�m