Laserfiche WebLink
Ggradient from the present distribution of gasoline <br /> ' and involved unleaded rather than leaded product. <br /> It is not likely that the water table gradient has <br /> ' ever reversed (which would allow product to migrate <br /> to the front of the terminal) , since the water table <br /> is controlled by the San Joaquin River and there are <br /> ' no known influences which could cause a reverse. <br /> ' C. Surface Spill at Time Oil Co. Truck Loading Rack <br /> ' Any product spilled during truck loading is <br /> contained on a concrete pad and drains to a 5, 000 <br /> gallon underground sump. The sump is equipped with <br /> ' an automatic pump which transfers the contents to an <br /> oil-water separator. The separator discharges water <br /> ' to the sanitary sewer. A sensor in the separator <br /> shuts off all pumps in the system so that product <br /> ' will not be discharged to the sewer. A leak in the <br /> sump or between the sump and the oil-water separator <br /> ' would have shown up in well T14, which is clean. <br /> D. Remote Surface Spill <br /> There is a low point in the drainage ditch along <br /> ' Navy Drive in front of Time Oil's terminal where <br /> water tends to accumulate. This point is close to <br /> ' well SP2 , the "high point" of gasoline on the water <br /> table. A spill at some location on Navy Drive could <br /> ' flow to this spot before soaking into the ground. <br /> As noted above, a spill of enough magnitude to <br /> account for the product recovered could not have <br /> ' gone unnoticed. Furthermore, the gasoline would <br /> have become highly weathered before soaking into the <br /> ground whereas the initial samples of gasoline <br /> analyzed by SPPL in this investigation were <br /> ' characterized as being "fresh" . <br /> ' - 20 - <br />