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Mr . Ted Norgard - 3 - August 28 , 1995 Because percolation rates measured at several of the test holes were in excess of the six inches in 30 minutes ( 12 inches/hour ) rate listed in criteria for the use of Procedure U . Percolation rate tests were repeated using Procedure #3 on the test hole at each of the parcels showing showing the lowest percolation rate , Hole #4 and Hole # 2 . Results for these tests , based on field measurements shown on data sheets included as Attachment C , Page 5 . Results were as follows : Parcel #1 , Hole #4 , the rate was 7 . 2 in/hr or 8 . 33 minutes/inch and for Hole #2 on Parcel #2 the rate was 7 . 8 in/hr or 7 . 7 minutes/inch. 11 ( 3 ) "The depth and gradient of the water table; " The San Joaquin County Flood Control and Water Conservation District ( SJCFC&WCD) measures the depth to water and prepares maps showing "Lines of Equal Depth to Water in Wells" , as well as maps showing "Lines of Equal Elevation of Water in Wells" . Copies of the latest avail- able versions of these maps have been used to reply to the above question. Attachment D - 1 ( two sheets ) is a copy of the SJCFC&WDD map showing Lines of Equal Depth to Water in Wells" , for Spring 1994 . The location of the property under study is shown by a red dot on Attachment D - 1 , Sheet #2 showing a portion of the map for the entire county. The property is located about midway between the line for the 80 foot depth and the line for the 90 foot depth . Thus , the depth to water at the Simpson property was approximately 85 feet at the time that measurements were made by the SJCFC&WCD in the spring of 1994 . Attachment D - 2 ( two sheets ) shows "Lines of Equal Elevation of Water in Wells , as measured by the SJCFC&WCD in the spring of 1994 . The location of the Simpson property is shown by a red dot on sheet #2 of this portion of the map for the entire county. Direction of ground water movement at this point is southeast toward a depression in the water table several miles away in that direction. Slope is about 15 feet per mile . A more general interpretation of the lines of equal ele- vation suggests that the general movement of ground water underlying the Simpson property would be in a general southerly direction toward a larger depression in the ground water table under the eastern part of the City of Stockton.