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7.5 National Pipeline Mapping System Database Live Oak reviewed the National Pipeline Mapping System (NPMS) Public Viewer on December 3, 2019 for evidence of hazardous materials pipelines within one- quarter mile of the Site. The NPMS does not depict any hazardous materials pipelines within the search radius. Local pipelines which are not mapped by the NPMS may be present in the area, however. 8.0 IDENTIFIED CONTAMINATION SOURCES The following sources of past, current, on-site, and off-site contamination have been identified as a result of this investigation: Identified Contamination Source Evaluation 1. Based on review of aerial For any former structures dating photographs, it appears that a from the 1980s or earlier, the number of structures existed on the assumption is made that lead- Site in the past. The structures on containing materials and/or the Site dated to the 1930s or pesticide residues may be present earlier through the late 1990s, in and around the structures. though most were removed by Underground infrastructure also 1975. (Past on-site) may exist in the vicinity of the former structures, and caution should be exercised in these areas. The typical standard of care for SSCRs does not require any further investigation of former structures. 2. The Site has been used for As with any agricultural property, agriculture since 1937 or earlier, agricultural chemical residues may and recently to grow almonds, be present in Site soils from alfalfa, wheat, and tomatoes. A previous applications. The typical variety of agricultural chemicals standard of care for SSCRs does have been applied to the Site not require further investigation of during the past five years, agricultural use. according to the San Joaquin County Agricultural Commissioner's office. (Current and past on-site) LOGE 1949 7