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(YVATC ASSOCIATES INC . 7.0 SCHEDULE OF TASKS The following estimated duration for each task depicts the preliminary time schedules to complete the previously fisted tasks. These time estimates do not include delays associated with the evaluation and installation of the VES and AS system, and permitting or equipment delivery delays. The estimated time frame would commence upon approval of the FRP by the regulatory agencies and award of contract by the City of Stockton. Unforeseeri delays may include permitting issues, off-site access issues,equipment procurement,or other issues. Task I Design Plans and Specifications................................................................................... 60 Days Task 2. Building, Air Pollution Control District and City Discharge Permits.........-...................... ........I..................I.................... 90 Days Task 3 Bid Package and Bid Evaluation................................................................... .............. 60 Days Task 4 Construction and Construction Inspection......................................................... ......... 65 Days Task 5 Systems Startup and Operation.. ................................................................................. 10 Days Task 6 Systems Performance Evaluation................................................................._....• ...... 2-3 Years The schedule assumes that soil and groundwater rernediation can be completed in approximately I to 3 years. The assumption is based on optimum soil, groundwater, and operating conditions existing for the VES and groundwater AS system, and that the hydrocartIons,can be effectively desorbed from the soil by volatilization, and removed from groundwater. The progress and expected duration of the soil and groundwater cleanup is dependent on physical factors such as fluctuating groundwater levels, adsorption and desorption effects, migration of offsite contaminants, and the correlation of data from specific points(wells and borings)with the actual conditions across the site. Fluctuating groundwater levels in on-site wells may decrease the effective screen available to vent from, and hence reduce the effectiveness of the VES. Duration of cleanup can be more accurately predicted after a performance evaluation of the VES has been completed. The schedule assumes that the performance evaluation Will show that the remediation system is effectively removing hydrocarbons from areas of Impacted sod and groundwater on site. It also assumes that no additional on-site or off-site vapor or groundwater wells, or other remedial technologies are required to effectively remediate impacted areas, once the treatment system is W:\62574.01\CAP report.doc 14