CORRESPONDENCE_2007 (1/07 - 6/07)

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r - A significant factor in the schedule is whether the County can gain access to the neighboring properties to perform the proposed investigation. The County intends that the driller will be scheduled after the issue of access is resolved. Usually, engaging a drilling contractor requires a competitive bid through San Joaquin County's Purchasing Department. To reduce the time needed, Shaw will invite competitive bids from pre- qualified bidders. San Joaquin County's Public works Department (Solid Waste Division) will ask the County Purchasing Department to issue a Purchase Order to the driller with the lowest bid, an approach approved by the Purchasing Department. Assuming approval by RWQCB staff and the staff of the San Joaquin County Environmental Health Department, and after receiving permission to enter the neighboring properties to perform the investigation, the following schedule is proposed: • Two weeks to obtain bids from pre -qualified bidders. Access to the neighboring properties will determine the number of off-site samples that can be taken. • Two weeks to issue a Purchase Order by the Purchasing Department. Application for drilling permits and locating underground utilities will occur concurrently. • Two week to schedule the drill rig. • Three weeks to sample the groundwater and soil gas in the bore holes, and install the permanent groundwater monitoring wells. • Three weeks for soil gas and groundwater analysis. Well survey will be concurrent. • Three weeks to prepare the Evaluation Monitoring Report. Based on this estimate, weather permitting, the work can be completed approximately fifteen week after approval of the work plan. Corral Hollow EMP WPlan Rev2Mar 22-07.DOC 3.1 March 20, 2007