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` February 25, 2002 <br /> Job Number: LGOI-397 <br /> Page 4 <br /> ` V. GROUND WATER <br /> ` The San Joaquin County Flood Control and Water Conservation District ground-water <br /> depth and elevation maps for Fall 1998 and for Spring 1999 indicate the most recent ground <br /> water levels available for San Joaquin County.' These maps show the ground water depths and <br /> elevations for the subject site and were used to determine the general depth and flow direction of <br /> regional ground water(Plates 2 though 5). The following table summarizes all the available <br /> ground water information collected for the site and nearby area. <br /> Table 2. <br /> Summary of Available Ground Water Information. <br /> Date,Source Groundwater Notes <br /> Depth <br /> November 30,2001, 18-ft deep soil boring Unknown Ground water not encountered. <br /> (deepest)at existing east septic system.,Neil <br /> _ O.Anderson&Associates,Inc. <br /> January 28,2002,22.5-ft soil boring(deepest) Unknown Ground water not encountered. <br /> located in orchard north of existing facility. <br /> Neil O.Anderson&Associates,Inc. <br /> November 30,2001,water sample obtained Unknown. Water quality test Nitrate-0.598 mg/L, <br /> from well located at 4799 North Jack Tone N(598 ug/L-N or 2.7 mg/LNO,). <br /> Road,Stockton,CA Water quality test DBCP-ND. <br /> Fall 1998, San Joaquin County Flood Control About 120 feet Gradient and flow direction <br /> and Water Conservation District map.' undetermined. Site located in near <br /> ground water depression. <br /> Spring 1999, San Joaquin County Flood About 104 feet. Gradient and flow direction <br /> �- Control and Water Conservation District' undetermined. Site located near ground <br /> water depression. <br /> Note: ND=Non-Detectable(or not found at detection limits). <br /> According to the Fall 1998 and Spring 1999 ground water maps, the depth to ground <br /> water at the site was found to range between 120 to 104 feet(see Plate 2 and Plate 3). The <br /> ' San Joaquin County Flood Control and Water Conservation District Depth to ground water and ground- <br /> water elevation maps Fall 1998 and Spring 1999. Published biannually,Scale: 1 inch=2 miles. <br /> r <br /> pE450 <br /> 4 <br /> 1 <br /> 0 <br /> 4. <br />