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Lodi City Landfill November 16,2011 North of Awani Drive,Lodi,California Project No. 104690061 Site investigation activities will be conducted in general accordance with the subject work plan, applicable regulatory requirements (statutory authority for investigating solid waste disposal sites as in California Public Resources Code (PRC) Section 45013, et seq.) and requests by the EHD/LEA. PRC Section 45013 states that the board shall make available guidance and assis- tance to the enforcement agency regarding the inspection, investigation, enforcement, and remediation of illegal, abandoned, inactive, or closed disposal sites to ensure that public health and safety and the environment are protected. This plan and the results of the investigation will be used to evaluate the potential presence of landfill gas (LFG), extent and types of subsurface materials;and if required, assist with identifying and developing site remedial alternatives. 2. PROJECT OBJECTIVES The project objectives of the site investigation include the following: • Evaluate the potential presence and composition of LFG and potential LFG migration. Sub- sequent monitoring and sampling of the LFG wells will provide information on the locations, constituents, concentrations, and trends of LFG with time. The LFG wells will be monitored for methane, other typical landfill gases, and volatile organic compounds (VOCs) due to the presence of petroleum hydrocarbon-bearing wastes. If LFG is present at concen- trations that exceed regulatory levels and/or are a concern, then the owner(s) of the site will be required to develop and implement remedial measures to bring the site into compliance to protect public health and safety and the environment. • Evaluate waste types and locations, and to the extent possible, the potential presence of wastes west of the railroad tracks, based on background information and results of the sub- ject investigation to obtain an estimated in-place volume of wastes. • Evaluate the presence, characteristics, composition, and thicknesses of the landfill cover (cap) at locations explored with respect to whether it meets state minimum standards for cover thickness, extent, slope, and grading/drainage. The subject investigation specifically does not address requirements mandated by other state and/or local regulatory agencies with respect to evaluating potential water quality issues and the necessity to implement a groundwater monitoring program. While this investigation will provide information pertaining to the locations, extent, and characteristics of the wastes at the locations explored, it is not specifically designed in a manner to delineate the extent of wastes. While the 104690061 R6nal.doc 2 N*7t/o U*uure