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May 25,2001 <br /> Job Number: LGOl-115 <br /> Page 4 <br /> Address,Date Tank Capacity Lines,Length,Pits Comments <br /> 28081 N.Nichols Add one(1)25'x36"seepage pit Addition/repair. <br /> Road,Galt,5/31/73 <br /> 27831 N.Nichols 1200 gal. Installation of at three(3)40-ft leach Additionlrepair. <br /> Road,Galt,6/21/83 lines and four(3)25'33"seepage pits. <br /> 27550 N.Nichols 1600 gal. Installation of at three(3)40-ft leach Addition/repair. <br /> Road,Galt, 11/2/98 lines and four(3)25'36" seepage pits. <br /> V. GROUND WATER <br /> The San Joaquin County Flood Control and Water Conservation District ground-water <br /> depth and elevation maps indicate the ground water levels most parts of the San Joaquin County.' <br /> The most recent ground-water maps for Fall 1998 and Spring 1999 indicate the ground-water <br /> depths ranges between 65 to 73 feet. The ground-water flow direction and gradient near the site <br /> were interpreted from the map to be flowing eastward ranging between 11 to 14 feet per mile <br /> (Plates 2 thru 5). No ground water was encountered in our borings which terminated at 25 feet. <br /> The following table summarizes all the available ground water information collected for the site <br /> and nearby area. <br /> Table 2. Summary of Available Ground Water Information <br /> Date,Source Groundwater Depth Notes <br /> May,2001,six(6)25-ft soil borings,Neil Unknown Shallow ground water encountered <br /> O.Anderson&Associates,Inc. in each of the six(6)borings. <br /> Water sample from a well located at 28082 Unknown. Water quality test Nitrate- 17 mg/L <br /> N.Nichols Road,Galt,California. as NO3(3.1 mg/I as N). <br /> '- Water quality test DBCP-ND. <br /> Fall 1998,San Joaquin County Flood 65+-feet Gradient east-southeast about 11.1 <br /> Control and Water Conservation District feet per mile. <br /> map.' <br /> Spring 1999, San Joaquin County Flood 73+-feet Gradient east-northeast about 14.3 <br /> Control and Water Conservation District. feet per mile. <br /> Note: ND=Non-Detectable(or not found at detectable limits). <br /> t 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: l inch=2 miles. <br /> � 'or�soy <br /> i ` . <br /> r <br />