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r ADDITIONAL COMMENTS GIVEN OR REQUESTED AT THE ENVIRONMENTAL REVIEW COMMITTEE HEARING ON April 30, 1975 WALNUT ACRES SUBDIVISION (S-75-3/EIR 75-7) Water: The water table in the immediate vicinity of the subject subdivision proposal has been dropping. The San Joaquin County Flood Control and Water Conservation District has / monitored two wells, one (20N2) at the southwest corner of Overhizer and Cherokee, east of the site. The other (30H2) is between Cherokee and Waterloo on the west side of Cherryland (2 miles north of Waterloo) . See Locational Map, page Water level elevations are contained in the table below: Both wells are for irrigation purposes (30H1 is abandoned) . Season: Year: Depth To Water: Well# 20N2 30H1 Spring 1970 64.5 Ft. Fall . 1970 65.5' Spring 1971 59.0' 60.5 ' Fall 1971 65. 5 ' 67.0 ' Spring 1972 62.6 ' 69.5' Fall 1972 68.5' 72.0 ' Spring 1973 68. 5 ' 70.2 ' Fall 1973 72.5 ' 72.0' Spring 1974 67. 5' 68.0 ' Fall 1974 ---- 75.0' Spring 1975 68.0 66.0' (This data taken from the County Flood Control Water Conservation District Water Well Monitoring Program.) In well #20N2 there has been a 7.0' drop in the water table in the fall measurements and a 7.0 ' drop in the spring measurements. In well #30H1 the water table has dropped 1.5 ' , according to spring measurements and a drop of 9.5 ' during the fall measurements over the last 6 years. The impact of a 43 unit subdivision is difficult to determine with regard to the water table. Residential developments cause a constant drawdown on the water table using water in both spring and fall, whereas agriculture normally utilizes it only on a seasonal basis, as reflected in the above table. Irrigation practices cause overloads -1-