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October 1, 2004 NOA Project Number: LE03-034 We understand the monitoring wells may be installed after staff approval of the workplan. Upon installation of the monitoring wells, a Report of Results will be submitted to the Board. 1.0 GENERAL INFORMATION A California licensed geologist or engineer will oversee the installation of the ground-water monitoring wells at CSC/SHPI to be consistent with the workplan presented herein. CSC/SHPI will not proceed with the installation of ground water monitoring wells until it receives written approval from the Board. 1.1 Monitoring Well Location and Depth The basic purpose for installing ground water monitoring wells is to: 1). Determine the ground-water flow direction and ground-water gradient below the site. 2). Monitor for background water quality. Motor constituents of concern in ground water below the waste water treatment pond and below the two agricultural application areas. This will requite a minimum of four (4) monitoring well locations. Based on information presented in out Report of Waste Discharge-Additional Required ' Information, dated January 28, 2004,it is estimated that depth to ground water, based on County ground water maps from 1994 to 1998,is between 107 feet to 127 feet (NOA, 2004) within the local L area. The ground water flow direction is toward the southwest (average 203 degrees) at a gradient of 0.001 to 0.0008 (about 4 to 5 feet per mile drop). We are proposing the use of four (4) monitoring wells to accomplish the above objectives. Sheet 1 indicates the proposed locations of the four (4) monitoring wells. The proposed monitoring well locations were set at a distance of 90 feet or greater from four (4) on- site production wells. We understand from Ron Kaiser of CSC/SHPI that three (3) of the most active production wells pump between 126 to 468 gallons per minute up to 16 hours per day during the busy season. We cannot state with certainty that the production wells will not affect the local ground water gradients on the property. The proposed locations of the motoring wells were selected to be within the two application areas and adjacent to the existing wastewater pond. A background water quality monitoring well was placed away from existing septic systems and ' application areas. 2