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BACKGROUND <br /> American Environmental Management Corporation (AEMC) inspected the No. 6 fuel oil <br /> courtyard tanks and sump during September 1986 at the Newark Sierra Paperboard <br /> Corporation (formerly Gold Bond Building Products) plant to determine the feasibility of <br /> conducting precision leak testing. Based upon this inspection, AEMC determined that the <br /> No. 6 fuel oil tanks could not be precision tested in accordance with State Regulations <br /> (Section 2643, Title 23, California Administrative Code). <br /> The tanks and sump consist of buried concrete vault-like structures which lack standard fill <br /> pipes. Access to the tanks is limited to a 2-foot diameter concrete-formed manway. <br /> Neither tank can be properly sealed to allow for use of an above-ground standpipe which is <br /> needed to perform a full static head pressure test. <br /> PIPELINE MONITORING <br /> No system was available to adequately monitor for leaks in the fuel line that connects the <br /> Courtyard fuel tanks to a 5,500-barrel fuel storage tank. <br /> CLOSURE PLAN (INPLACE) <br /> Since there were no vadose zone monitoring alternatives that would adequately monitor <br /> No. 6 fuel leakage from the courtyard tanks, sump, or product delivery pipeline, Newark <br /> Sierra Paperboard Corporation initiated inplace closure proceedings for the courtyard <br /> tanks, sump, and pipeline. <br /> These closure proceedings are outlined in AEMC's "Closure Plan for Gold Bond Building <br /> Products" of April 1989. <br /> Page 4 <br />