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0 <br /> Test hole TS-8 initially was found to be free of a floating <br /> ' hydrocarbon layer . On March 11, 1988, three days following its <br /> ' installation, 0. 5 inch of product was measured in the test <br /> hole. This suggests that the hydrocarbon layer migrated into the <br /> ' test hole from sources to the north (Time Oil property) or west <br /> (Southern Pacific pipeline right-of-way) . On March 15, 1988, six <br /> ' days following its installation, about 4. 5 inches of product were <br /> measured in the test hole. The product level remained the same <br /> through March 23, 1988. Based on the measurements taken to date, <br /> it is evident that the hydrocarbon product is migrating into test <br /> well TS-8 from offsite sources to the north and west . <br /> ' Test holes TS-9 and TS-10, located near the Time Oil prop- <br /> erty boundary on the west and east sides of the building leased <br /> by California Fuels, were found to be contaminated with floating <br /> hydrocarbons following their installation. On March 9, 1988, <br /> test holes TS-9 and TS-10 showed four and seven inches of <br /> ' hydrocarbons, respectively. On March 10, 1988, 4 . 5 inches of <br /> hydrocarbon were measured in TS-9, and the level has remained <br /> constant . The product thickness in TS-10 remained constant until <br /> March 17 , 1988, when 9 inches were measured. Although additional <br /> measurements are necessary to confirm the observed increase in <br /> product thickness in test hole TS-10, it suggests that the <br /> hydrocarbon product is migrating onto the Tesoro property from <br /> the Time Oil property. <br /> ' No floating hydrocarbon product has been measured in the <br /> test holes TS-1, TS-2, TS-3, TS-4, TS-5, TS-6, and TS-11 or in <br /> monitoring wells M-1 and M-2. The test holes are located at key <br /> - 13 - <br />