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Phase LF Hazardous Materials Study for the Lodi Rail/Multimodal Station July 24, 1997 to Wilbur Smith Associates Project No. E168 t3) At least 5 dry cleaning facilities were located along or near Sacramento St. between E. Walnut St. and E. Elm St. Many dry cleaners have been responsible for soil and ground water contamination as a result of improper disposal of cleaning solvents. 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 comer 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., some confirmatory sampling is suggested. 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. The purpose of our work was to provide documentation, evaluation, and preliminary recommendations for remediation of potential hazardous waste issues, if discovered, within that portion of the site proposed for purchase. In order to address the issues at the site the following general scope of work for our Phase II investigation was proposed: ' Complete a magnetic/electromagnetic survey of the site. The survey would include all areas of concern and data will be collected in a grid pattern approximately 10 feet by 10 feet. This survey would assist us in locating buried steel structures such as tanks and pipelines (if present) associated with the old gas station sites or other features. • Prepare a site work and safety plan which incorporates the findings of the magnetic survey. ' Drill and sample at the approximate locations identified in the Site Work and Safety Plan. ' Trench at the approximate locations identified in the Site Work and Safety Plan. • Complete laboratory testing involving EPA suites of tests to detect suspected and/or ' known contaminants. • Produce an interim summary letter report following receipt of laboratory results. This letter was submitted on November 15, 1996. • Produce this report for the Phase II Investigation which includes a discussion of our ' investigation and findings, laboratory test results, conclusions and preliminary recommendations for remediation if necessary. ' 2 ' V ESPANA GEOTECHNICAL CONSULTING