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Dividend Development Company July 22� 1991 Report of Findings - North Parcel page 34 CONCLUSIONS: i I Laboratory analyses of ; both soil and groundwater samples at the Dividend site (North parcel) reveal the presence of hydrocarbon chains corresponding to motor oil, gasoline, , and. diesel fuel. Small amounts of benzene, toluene, . and xylene were also detected. Free product collected from MW-13 located on the southern parcel of the Dividend property has the color, consistency, and odor of crude oil. The present maximum lateral extent of petroleum migration in the i groundwater northward from West Byron Road has been defined by MW-5 I which had no detectable levels of contamination. MW-5 is located s less than two hundred feet (2001 ) north of West Byron Road. Resultant organic vapor concentrations in the subsurface indicate no sustained vapor levels in excess of allowable concentrations of fifty (50) ppm as determined by the California Department of Health Services (DOHS) . { The petroleum contamination encountered on the Dividend property is believed to have originated off site from a petroleum pipeline on the Southern Pacific Railroad Easement. Pipelines on the property include the Getty pipeline (crude oily and the Santa Fe pipeline (refined petroleum products) . Sometime in the 195o's, the Getty pipeline ruptured in the vicinity of ,the contamination found at the Dividend site, and was reported to have originally covered approximately one acre of adjacent farmland with crude oil. The pipeline rupture may have been proceeded by smaller pinhole leaks or a cracked weld, introducing a steady increment of crude oil into the subsurface prior to the main rupture. More than one pipeline leak, from one or more pipelines, can not be ruled out. Toxic Technology, Inc.