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Revision Date: November 6, 2001 <br />Tracer Research Corp. <br />Tracer Tight Line Test <br />LINE TIGHTNESS TEST METHOD <br />Certification: Leak rate of 0.1 gph with PD =100% and PFA = 0%. <br />Leak rate of 0.005 gph with PD = 97% and PFA = 2.9%. <br />Leak Threshold: A pipeline system should not be declared tight when tracer chemical is detected <br />outside of the pipeline. <br />Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil. <br />Other fluids which are compatible and soluble with an acceptable tracer chemical <br />may be tested after consultation with the manufacturer. <br />Pipeline Capacity: Not limited by capacity. <br />Waiting Time: Ranges from 1 week to 4 weeks (normally 2 weeks) after tracer is added to tank. <br />For very large pipeline systems, several days or weeks may be required to circulate <br />tracer -labeled product through all parts of the pipeline. <br />Waiting time begins after tracer has reached all portions of the pipeline being <br />tested. <br />Tracer Dosage: Dosage of tracer is based on tank size, product volume in tank, and frequency and <br />volume of tank refills according to manufacturer's recommendations. <br />Tracer -labeled product must be circulated through the pipeline before test period <br />begins. <br />Pressurized pipeline must be brought up to operating pressure or operated on a <br />daily basis. <br />Permeability: Soil permeability must readily allow tracer movement through the tank excavation <br />backfill (greater than 1 Darcy). <br />Probe: Radius of influence of each tracer sampling probe is maximum 10 feet. <br />Pipeline must be accurately located to ensure that all pipeline surfaces are within <br />the zone of influence of a sampling probe. <br />Probes must be installed per Manufacturer's guidelines. <br />Comments: Frozen and saturated soil surrounding pipeline may limit effectiveness of this test <br />method. <br />Groundwater surrounding pipeline may limit effectiveness of test method (e.g. <br />when applied to pipelines containing water -miscible products or products whose <br />specific gravity is greater than 1). <br />Tracer Research Corp. <br />3755 N. Business Center Dr. <br />Tucson, AZ 85705 <br />Tel: (800) 394-9929 <br />Evaluator: Ken Wilcox Associates <br />Tel: (816) 443-2494 <br />Date of Evaluation: 10/04/91 <br />Evaluator: Control Strategies Engineering <br />Tel: (602) 682-8726 <br />Date of Evaluation: 05/92 <br />