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existing contaminated soil and groundwater rather than install a more expensive soil/vapor extraction system A brief outline of a proposed approach follows SUGGESTED PLAN FOR SITE CLEANUP 1 . Remove canopies and dispenser islands 2 . Disconnect any below ground water and utility lines that may be present 3 Excavate an area approximately 15 ' x 20 ' x 20 ' deep as shown on PLATE VII. Monitoring wells #1 & #3 may have to be destroyed if excavation work indicates the need to do so Removed spoil would either be placed at the rear of the property for aeration and remediation or transferred to an appropriate landfill It is estimated that a maximum of 175 yards of soil would be removed 4 . Soil samples would be taken from the sides and bottom of the excavation and analysed for BTEX (w/MTBE distinction, ) & TPHg. A 24 hour TAT would be requested in order to minimize the time that the excavation is left open Groundwater samples could also be obtained for analysis from the bottom of the excavation during this work 5 If there is sufficient inflow, groundwater which had entered the excavation would be removed with a vacuum truck and disposed of as required. 6 If the results of the laboratory analyses and field observa- tions are favorable, the excavation would be filled with clean soil & covered with asphalt, the remaining monitoring wells destroyed, and the site closed We will not proceed with additional work until you have had a chance to review this report If our proposed work is accept- able, we will begin preparation of a detailed workplan and cost estimates for submittal to the Cleanup Fund staff for approval Your timely review and response to this report will be appre- ciated Please contact our office at (916) 972-7941 if you have any question of wish to discuss our proposal in more detail . Wm J n er & Associates c Sanchez D GEp�oC/ . eth Thayer, RWQCB WI LIAM J HUNTER � 010