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November 29, 1984 <br />EVELYN L. COSTA <br />Representing The Fifth District <br />BOARD OF SUPERVISORS <br />Dear Santos Ranch Residents: <br />Room 701, Courthouse <br />222 East Weber Avenue <br />Stockton, California 95202 <br />Telephone 209/934-3113 <br />ANITA M. ACKERMAN <br />Administrative Assistant <br />In response to the questions asked at the October 24, 1984 meet- <br />ing, the following is submitted for your information: <br />1. Is it possible to monitor the wells at the Santos Ranch <br />areas as part of a semi-annual groundwater study?, <br />ANSWER: <br />The Flood Control District does not monitor wells in the <br />South County area in its semi-annual groundwater study, <br />as past monitoring has shown no conclusive correlation <br />between various wells. Monitoring of the private wells <br />in the Santos Ranch area, which are sealed to a depth of <br />fifty feet, would not give true indication of the depth <br />of the perched groundwater. <br />The only water quality testing which is conducted by the <br />- groundwater study is for specific conductance and total <br />dissolved solids, which are not primary drinking water <br />standards. <br />2. Are test results of the well currently being constructed <br />in the Santos Ranch No. 5 area available? <br />ANSWER: <br />Attached, are copies of test results conducted for the <br />Los Ranchos Subdivision well to a depth of 515 feet. <br />The test results conducted on the strata which lies 72-80 <br />feet below the surface and which probably represents the <br />strata from which the private wells in Santos Ranch are <br />drawing water, indicates the following standards are not <br />being met: <br />Iron <br />Total dissolved solids <br />Specific conductance <br />(micromhos per cm) <br />Nitrate as NO <br />3 <br />State <br />Mg/1 present Allowable Standard <br />.41 .3 Secondary <br />1,637 1,000 Secondary <br />2,183 1,600 Secondary <br />74 45 Primary <br />