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Report: Groundwater-quality Monitoring—July 29,2002: 7500 West Eleventh Street, Tracy, CA, Page 5 <br /> '} contained only low concentrations of diesel Dietz Irrigation 1999b it unlikely that an <br /> Y ( g }� Y Y <br /> _f contribution made by diesel migrating from the 24195 Chrisman Road site to the subject <br /> property would have had little, if any, deleterious affect on the environmental condition <br /> of the subsurface beneath the subject property. <br /> Finally, there are dispersed, low concentrations of a variety of hydrocarbons affecting <br /> wide areas of the shallow subsurface beneath the 7500 West Eleventh Street property and <br /> nearby land. The presence of these hydrocarbons can be attributed to minor leaks and <br /> spills from vehicles using unpaved areas of the former service station and being parked <br /> E on the shoulders of the streets over past decades. Evidence has also been found that fill <br /> used to bring West Eleventh Street, Chrisman Road and some of the adjoining sites to <br /> their present grade included some debris from bituminous macadam paving (The San <br /> r< '' Joaquin Company 2002a), To provide for clarity of the presentation of the primary and <br /> secondary plumes of affected groundwater emanating from the 7500 West Eleventh <br /> >: Street site, these dispersed areas of affected soil, which are of less than minor <br /> - _ significance, have been omitted from Figure 2. <br /> sic <br />