SITE INFORMATION AND CORRESPONDENCE

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would then be both north and south, and the gradient underlying the Simpson plant would become relatively flat. 3. The degradation of water quality is a regional problem. Deterioration of water quality at the Simpson property could be related to (a) overall ground-water deterioration, (b) recycling of percolated effluent, and/or (c) point-source degradation from the City of Ripon waste-treatment ponds. The location and completion of a new well is extremely important to minimize the recycling problem. Perforated interval and distance from the percolated effluent can all help reduce the recycling. Also, removing the percolated effluent from the influence of the pumping wells would be effective. A number of strategies come to mind that could alleviate some of the problems you are faced with. To accomplish this requires a first-phase monitoring program that can provide the necessary data for analysis. It is for this reason I have indicated the number and location of monitoring wells. At the time of drilling we can install other monitoring (continuous water-level recording on Well 1 and Ob-6, as shown in the proposal) and do monitoring on the newly installed observation wells that would be more costly to do at a later and separate time. Even with the program shown there is additional work that would be required to completely determine ground-water conditions for a new supply well. This work would include the drilling of 3 test holes on the property for running electric logs. An electric log is the only way to ascertain continuity of individual sand/clay (aquifer/aquiclude) layers. It also provides those intervals that should be screened and sealed for the well design specifications. If the E-logs showed continuity, then the production well could be located with only consideration to convenient access and distance from the leachate ponds (assuming recycling is determined to be a problem) . If there is no continuity, then questions as to individual aquifer quality would have to be addressed. Without going into the many aspects of determining the optimum design and location for a water-supply well, I would strongly recommend no work be done on a supply well until the monitoring field has been installed and the data analyzed. A lessor number of wells would most undoubtedly satisfy the State as to a proper monitoring program. On the other hand, a lessor number will not provide the information you need to answer some of the other and more important questions. The proposal sets forth unit prices for drilling and labor. Since we would use our own drilling rig, this gives us the flexibility to change the monitoring program as we go without 2