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3.0 SPILL DESCRIPTION <br />The pipeline section where the leakage occurred is 10 inches in <br />diameter and is under a normal operating pressure of 1000 to 1300 psi. <br />Drawing 1 shows the site location and the portion of the pipeline which was <br />suspected of leakage and is presently bypassed. This section is <br />approximately 800 feet long. In any one week the pipeline may convey <br />gasoline (leaded and unleaded), diesel fuel and JP4 fuel in various <br />quantities. <br />The rate of flow is stated to be 3000 to 3500 barrels/hour <br />(2100 gallons/minute) with accuracy of measurement being 3 to 5 barrels <br />in 10,000 barrels. It is therefore possible that a leak of approximately <br />1.3 barrels/hour at most may exist without being detected by SPPL operators. <br />At the meeting of involved parties in Stockton on February 28, 1986 <br />information indicating the extent of the fuel leak was presented by Arcady <br />Oil. This information included the following: <br />Petroleum liquid (probably gasoline) was discovered in Well No. 9 <br />on January 9, 1986. <br />Hydrocarbon odors were also detected in Well Nos. 1 and 8, and <br />"Old" No. 2. <br />3.1 Recent Data <br />Preliminary data collected by The MARK Group since February 27 <br />indicate that the major concentration of petroleum product is limited to an <br />area in the northern part of the site bounded by Well Nos. 9, 1, 2 and <br />"Old" 1. The product thicknesses in these wells, as measured on March 3, <br />1986 ranged from 0.02 to 0.05 feet in the above well. Details of the <br />results will be submitted in future. <br />-5-