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' Phase 11 Hazardous Materials Study for the Lodi Raid/Multimodal Station July 24, 1997 to Wilbur Smith Associates Project No. E168 ' PHASE II HAZARDOUS MATERIALS ASSESSMENT INTRODUCTION Project Location and Description ' The Lodi Rail/Multimodal Station site is located in the City of Lodi, San Joaquin County, California and is bounded by East Elm Street on the north, East Oak Street on the south, North and South t Sacramento Street on the west, and the Southern Pacific Transportation Company (SPTCo) railroad tracks on the east. The subject site was extended south to East Walnut Street, for review purposes, due to its possible inclusion into the proposed project. A Site Location Map is attached as Figure 1. ' The subject site is a rectangular shaped parcel that covers a portion of three city blocks. Based on site topography provided by Wilbur Smith Associates(1995),the site is generally flat with elevations ranging from approximately 50 to 51 feet above mean sea level (msl) at the north end to approximately 49 feet msl at the south end. Lodi Station Site No. 1 is planned as a new multimodal transportation facility. The site would be modified to include bus parking, passenger loading platforms, auto parking, and potentially a relocated railroad passenger depot building. Other improvements may include ticketing kiosks, restroom facilities, and light standards. Present grades are expected to be maintained. Purpose and Scope of Work ' This report presents the results of our Phase II Hazardous Materials Assessment(environmental site assessment) of the subject site, performed during October 1996. This subsurface investigation is in follow-up to the findings and conclusions presented in our Phase I -Hazardous Materials Study dated August 10, 1995, to subsequent discussions with City and County personnel involved in the project, and to a review of the NERI Summary Report, Potential Responsible Parties Search and Sources ' Investigations, Lodi Groundwater Site dated March 20, 1996. The intent of the Phase II geophysical testing, trenching, drilling, and sampling program was to ' identify hazardous wastes that may be present on the subject site. In particular, the subsurface investigation was to address the following items: ' 1) Soil gas sampling completed by the RWQCB in 1989 suggests that there is a potential for PCE and TCE occurring near the surface within the project site between Elm and Pine Streets. The source could be on-site or from adjacent site contamination (such as the plume from Busy 1 Bee Cleaners located at 40 N. Main Street). 2) Historical research indicates that there were at least 3 service stations located within the Site (see Figure 3, Site Status, 1950). Each of the 3 stations appears to have had fueling, greasing, and wash areas. We expect that underground storage tanks (UST's) were (or are) present at all 3 sites. Based on the age of the service stations, it is not uncommon to find that UST's ' have leaked petroleum hydrocarbons into the soil. Record of tank installation and/or removal could not be found. ' 1 ' V ESPANA GEOTECHNICAL CONSULTING