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j3 '97 14: 14 FROM _ DER -ROOT SERVICE To 9 1 ?E59908 <br />U. <br />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 re uiremenis. <br />Method Description <br />Name Discriminating DistTenser P an Containment St�mnens, o <br />Version number 794380-3�7. 794380-352 - <br />Vendor Veeder <br />125 Po r F D 'v B x _._ <br />(street address) <br />Simsiz�t,�T <br />060-7Q-203 (203 651-� QLO - <br />(city) (state) (zip) (phone) <br />Detector output type: ( ) Quantitative (x) Qualitative <br />Detector operating principle: ( )Electrical Conductivity () Thermal Conductivity () Interface Probe <br />(X) Product Permeable () Product Soluble (X) Other at <br />Detector sam lin fre uencv: 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 />P.. W- 1 of % <br />