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Report: Groundwater-quality Monitoring-December 20-21,2005, 7500 West Eleventh Street, Tracy, CA. Page 8 <br /> property would have had little if an deleterious effect on the environmental condition <br /> prop Y � Y� <br /> of the subsurface beneath the subject property. <br /> 1.5.3 Dispersed Petroleum Hydrocarbons in Shallow Soils <br /> Finally, there are dispersed, low concentrations of a variety of hydrocarbons affecting <br /> wide areas of shallow soil beneath the 7500 West Eleventh Street property and nearby <br /> land. Their presence can be attributed, in some instances, to hydrocarbons that have a <br /> vegetative source rather than being related to releases of fuels, while in others, they can <br /> be attributed to minor leaks and spills from vehicles using unpaved areas of the former <br /> service station and being parked on the shoulders of the streets over past decades. <br /> Evidence has also been found that fill used to bring West Eleventh Street, Chrisman Road <br /> and some of the adjoining sites to their present grade included some debris from <br /> bituminous macadam paving (The San Joaquin Company 2002c). To provide for clarity <br /> of the presentation of the primary and secondary plumes of affected groundwater <br /> emanating from the Navarra Site, these dispersed areas of affected soil, which are of less <br /> than minor significance, have been omitted from Figures 2 through 9. <br /> i <br /> sic <br /> �y <br />