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Mr. Dave Olmstead -2- February 2, 1982 I. Groundwater Movement Have any piezometers been installed on the site to monitor seasonal fluctuations in groundwater levels, and the gradient of the water table (unconfined) across the project site? Has the extent of the recharge/seepage effect produced from the earth-lined canal bor- dering the property been investigated. What is the "anticipated highest level of groundwater" within the project site, and how did you assess this value? Are you aware that on April 8, 1981 the groundwater conditions in the Santos Ranch Area were investigated by the California Regional Water Quality Control Board and two San Joaquin County Sanitarians, at which time groundwater was observed in an open trench 6 feet below ground surface? Have you performed any aquifer tests or drawdown tests on shallow (less than 120ft.) wells in the area to determine the aquifer properties? Have you evaluated any driller's logs from the area to determine the lateral extent, orientation, and depth of any significant confining layers (clay aquicludes) present in the subsurface? II. Groundwater Quality Have you examined any chemical and bacteriological test results from wells in the immediate area? Is there a significant difference in water quality between deep and shallow wells in the immediate area? Have you prepared drawings illustrating a community well and water distribution system. If available groundwater does not meet the ac- ceptable (Calif. Dept. of Health Services, U.S.P.H.S.) chemical, phy- sical and bacteriological standards for domestic water supply, would you install an appropriate water treatment system? Have you examined the loadings (lb./acre) of dissolved minerals, notably nitrates, that would be added to the groundwater currently consumed by local resi- dents. Do you anticipate a 10%, 20%, 50%, or 100% increase of nitrate levels in domestic wells downgradient of your proposed development? Are you aware of any other areas in California that currently have groundwater contamination problems resulting from dense concentrations of leachfields? III. Sewage Disposal Did any of the five eight foot deep soil profiles required inter- cept the water table, and if so which profiles? On what dates were these profiles examined? Were the profiles dug 8ft. below existing or proposed grade? Did any of the 20 percolation test pits required not maintain the required "stabilized" percolation of 60 minutes per inch, and if so on which lots?