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Diesel Impacted Soil Removal Report May 2010 California Army National Guard Armory Lodi, CA Figures summarizing soil analytical data, site photographs, field notes, laboratory analytical reports, and waste disposal documentation are provided as appendices to this report. Tables summarizing soil analytical results for pre-characterization and confirmation samples are presented within the text in Section 4.0. 2.0 SITE BACKGROUND This section provides background related to the site and diesel spill that has prompted the removal action documented in this report. 2.1 SITE DESCRIPTION AND HISTORY The site is located at 333 North Washington Street in Lodi, California(Figure 1;Appendix A). At an unspecified time prior to August 3,2009,when the SJCEHD was notified via California Emergency Management Agency Hazardous Materials Spill Report Control#09-5417, approximately 20-30 gallons of diesel fuel reportedly spilled from a CA ARNG vehicle parked in the gravel parking area in the northwestern portion of the site. Figure 2 (Appendix A)provides an aerial view of the spill area,which is in the back of the facility near the baseball field and adjacent to the fence and gate along North Stockton Street. According to the notice, CA ARNG personnel partially excavated the spill but staining remained after the removal action. The spill location was subsequently covered with plastic sheeting pending proper excavation,transportation, and off-site disposal of impacted soils. The spill location covers an area of approximately 10 feet by 15 feet(150 square feet). On September 9,2009, OTIE personnel visited the site to evaluate site conditions.A photograph of the spill area, covered with plastic as described above, is included in the photographic log(Appendix B). The CA ANG filed a"Notification of Hazardous Waste Discharge"report on August 3,2009 with the Department of Toxic Substances Control(DTSC)and the CVRWQCB pursuant to Health and Safety Code §25180.7. In a letter dated September 30,2009,the SJCEHD issued to the CA ARNG a"Notice to Abate Immediately"the diesel contaminated soil at the site. The SJCEHD has subsequently referred oversight to the CVRWQCB. The site has also been placed on the list of hazardous waste contaminated sites in San Joaquin County that is maintained by SJCEHD.