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Formation Characteristics Depth to Water: 53 feet bgs Corcoran Clay: Approximately 250 feet bgs to 375 feet bgs as indicated by the presence of blue clay in the original construction log (see Appendix A) Materials: Interbedded coarse and fine-grained materials Recommended Intervals for Groundwater Samples Upper Tulare Aquifer: None,perforated zones are encrusted or covered by the column pipe so that groundwater samples are not practical Corcoran Clay Zone: 370 to 375 feet bgs Lower Tulare Aquifer: 500 to 510 feet bgs Due to the deformation of the casing at 174 feet,it will not be possible to install packers to partially isolate the sampling zones; the packer will not clear this deformed zone in the casing. It is therefore proposed to collect groundwater samples by using a adjustable rate submersible pump to purge adjacent to the open perforations slowly (1 to 4 gpm) and monitor water quality parameters (pH, DO, SC, Eh, and turbidity) to determine when the water becomes representative of the formation. The sample will then be collected directly from the pump after the flow rate is adjusted to less than 1 gpm. The deepest sample will be collected first;then the pump will then be raised to the next interval. At least 100 gallons will be purged from each zone to maximize the representativeness of the samples and minimize the potential for cross-contamination. Quality control samples (duplicates and splits) will be collected as appropriate from both sampling zones. Recommended Procedures for Abandonment of Well AG-3 1. Use a grout mixture of 1:1 Cement and Pozmix®, 2% Bentonite and 2% Calcium Chloride. 2. Place first lift of grout from 570 feet bgs to 350 feet bgs. This is the interval corresponding to the Lower Tulare Aquifer. The pump bowls and debris at the bottom of the well will be left in place. Grout should be placed using hydrostatic pressure only. This lift should be allowed to set prior to continuing abandonment. The depth of the top of this first lift will be verified by setting a weight(balancing a plug) on the top of the grout column. 3. Due to the condition of the well,excessive perforation or disturbance of any portion of the casing is not recommended. A knife perforator cannot be.used due to the deformation of the casing at 174 feet; therefore, shot perforation using explosives will to perforate the well between 225 and 300 feet bgs. page 2 of 3