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Phase II Site Assessment Workplan/Health and Safety Plan October 1996 for the Lodi Rail/Multimodal Station Project No. E168-1 Solvent soil contamination can migrate laterally and affect the near surface soil at the subject site either in the liquid or vapor phases. PCE and TCE contamination has been identified in several of the City of Lodi water wells. Preliminary studies have been completed by the RWQCB and the Department of Toxic Substances Control to locate these solvent source areas. None of the dry cleaning facilities once located along Sacramento Street (adjacent to the subject site) has yet been identified as a source area. Busy Bee Laundry and Cleaning at the corner of East Elm and North Main Streets has been identified as a solvent source. Although, based on available data, it appears unlikely that soil contamination has occurred on the subject site due to the dry cleaning facilities located along Sacramento St., the possibility can not be eliminated. 4) Possible maintenance of railroad equipment at the southwest corner of East Elm and North Main Streets was revealed in historic aerial photography. There may be a potential for near surface hazardous wastes to migrate beneath the Site from this possible maintenance area. 5) A petroleum product pipeline operated by Santa Fe Pacific Pipelines traverses the eastern edge of the Site. An industrial waste line is reported to be located below Sacramento Street adjacent to the western edge of the Site. Known leaks or releases from these lines have not been reported. 6) A magnetic and electromagnetic survey of the Site indicates numerous subsurface anomalies that do not appear to be associated with known structures on the site. Magnetic information is used to map objects that contain iron or other buried objects that may exhibit magnetic susceptibility contrasts. The electromagnetic survey measures apparent ground conductivity and will respond to conductive objects (such as pipelines and UST's) and in some cases backfilled trenches. Figures 4 and 5, Maps of Geophysical Anomalies of Interest, show the location of anomalous features identified from this survey. Table 1, Tabulation of Geophysical Anomalies, provides a short description of each identified anomaly. Excavation and Drilling Soil excavation, drilling, and sampling is proposed at the approximate locations shown on Sheets 1 and 2. These trenching and boring locations may require minor modification in the field due to progressive findings, utilities, and physical barriers. Backhoe excavations are expected to be excavated to depths of 2 to 4 feet and are intended to expose unknown subsurface facilities (abandoned fuel tanks, oil sumps, abandoned pipelines, and or scrap metal is anticipated) for positive identification. If shallow contamination of soil is observed, soil samples will be collected for analysis. 3 V ESPANA GEOTECHNICAL CONSULTING