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' March 23,2006 NOA PROJECT NUMBER E05131A ' was submitted by NOA to the Regional Board on February 1,2006. The Regional Board approved the monitoring well installation workplan with addendum on February 9, 2006. ' 3.0 INSTALLATION OF MONITORING WELLS The purpose of monitoring wells MW-1,MW-2 and MW-3 is to assess the background groundwater quality at the facility prior to and during application of wastewater to the land treatment area. ' MW-1 is considered the up gradient background well. MW-2 is located in the future land application area. ' MW-3 is located adjacent to a wastewater treatment pond. 3.1 Monitoring Well Locations ' Appendix A- Plate 2 is a site map showing the location of the monitoring wells. 3.2 Pre-Drilling Permits and Safety Meeting Prior to drilling,well drilling permits were obtained at the San Joaquin County Environmental Health ' Department, and a check for any existing underground utilities was conducted at the drill locations. Also,a brief"tailgate safety meeting"was conducted to inform the well installation crew of anticipated hazards and the emergency action plan for the site. On-site workers used Level D personal protection ' equipment. 3.3 Borehole Installation The borehole (133) for MW-3 was drilled onsite March 13, 2006. The monitoring well MW-3 was completed on March 14,2006. The borehole (B2) for MW-2 was drilled onsite March 15,2006. The ' monitoring well MW-2 was completed on March 16, 2006. The borehole (B1) for MW-1 was drilled onsite March 16,2006. The monitoring well MW-1 was completed on March 17,2006. The boreholes were drilled by an AMS all-terrain track mounted drill rig owned and operated by NOA. The soil boreholes were advanced using eight inch OD hollow stem augers,and soil samples were collected every eight feet using the California modified Standard Penetration Test, except where noted. The on-site geologist collected soil samples,logged cuttings, and produced a log of the boreholes. Attached are the borehole logs for monitoring wells MWA to MW-3 (see Appendix B - Plate B1 to 113). Monitoring wells MWA,MW-2 and MW-3 were advanced to a total depth of 59' , 59.5', and 60' bgs,respectively. The monitoring wells were built with a 20 foot screened interval. 3.4 Soil Lithology Description ' Soil descriptions were made based on the Unified Soil Classification System. Soil was observed in the sampler(approximately 1.5 feet long) every eight feet,drill cuttings were observed,and drill speeds and ' 3