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November 5, 2001 53636.001 Mr. Peter Ingram City of Redwood City Page 8 from SMCGPP and the Department of Water Resources (DWR). A well survey questionnaire will also be hand delivered to property and business owners within the radius of the survey. Based on information in SCI's Work Plan, we understand that an underground culvert transects the northeast comer of the site. We will evaluate the potential for this underground culvert to act as either a preferential pathway or a physical barrier to groundwater flow during the planning stages of the well survey. Based on the results of our information review and the well survey, as well as our discussions with SFRWQCB and SMCGPP, Harding ESE will develop a site conceptual model to help guide future investigations and risk assessment studies. Task 5 - Data Compilation and Evaluation Harding ESE will compile and evaluate the data collected from the CPT investigation, groundwater and soil sampling program, soil gas survey, and sensitive receptor survey. Evaluation of these data during the various stages of the investigation will assist in better defining the scope of subsequent tasks, and will also be used to determine the need to modify the scope of subsequent tasks, if necessary. Task 6 - Report Preparation Harding ESE will describe the scope and results of the CPT investigation, groundwater and soil sampling program, soil gas survey, and sensitive receptor survey in a written report. The report will include chemical data summary tables; a vicinity map and site plan; groundwater, soil, and soil gas HVOC concentration contour maps; geologic cross-sections; logs of the CPT data; and logs of the sampling probes. The report will also include completed well survey forms, analytical laboratory reports, and chain-of-custody documents. We will present our conclusions regarding the vertical and lateral extent of the groundwater HVOC plume, the potential presence of dense non aqueous phase liquid (DNAPL) based on the investigation findings, potential preferential pathways for groundwater migration, the results of our soil gas survey, and anticipated tasks that will be required during the next Phases of work at the site. Task 7 - Consultation and Meetings Harding ESE will consult with the City throughout the project, as necessary. We anticipate that the scope of our consultation will include: discussions with City staff, evaluation of disposal options for investigation-derived wastes, discussions with SFRWQCB, and communication with the City's outside counsel (Mr. Robert Doty of Cox, Castle & Nicholson) regarding potential cost recovery efforts. We also assume that we will attend meetings, as required, throughout this phase of the project. Because the level of effort required for this task is uncertain, we have included in our proposal a suggested preliminary budget for this task. Harding ESE g MAOTEC COMPANY