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TANK MONITORING <br /> Since complete full system testing cannot be accomplished on the <br /> three tanks , the only feasible alternative is to dispense with <br /> tank testing and implement monitoring as per Title 23 require- <br /> ments. Accordingly, AEMC recommends installation of ground water <br /> monitoring wells without vadose zone monitoring. This is a <br /> modification to Alternative 2 , Section 2641 , Title 23, for the <br /> following reasons: <br /> ` 1 . No. 6 fuel oil gives off little to no vapor ; therefore <br /> rendering vapor or vadose zone monitoring wells <br /> ineffective. <br /> 2. Based on information provided by Gold Bond on the <br /> specific gravity of the No. 6 fuel oil held in the <br /> tanks, the product will float on water and therefore <br /> show up in a monitoring well if a leak were to occur . <br /> 3. Depth-to-ground water in the vicinity of the tanks is <br /> relatively shallow, ranging from 10 to 15 feet, which <br /> would allow for early detection of a leak before it <br /> becomes a major problem. <br /> Monitoring Wells <br /> AEMC proposed to install monitoring wells at the tentative <br /> locations shown on Attachment 3, Monitoring Well Locations. <br /> Monitoring wells 1 and 2 are intended to monitor 90 barrel tanks. <br /> 4 <br />