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Pmt <br /> December 16, 1986 AGS 86102-1 <br /> Beacon Service Station 43-492 - Manteca, California <br /> The elevation differences were combined with measurements of the <br /> static water levels in the respective wells to calculate the <br /> water level elevation differences (Table 3) . <br /> TABLE 3 <br /> GROUND WATER ELEVATION DIFFERENCES <br /> MONITORING WELLS <br /> BEACON STATION 03-492, MANTECA, CALIFORNIA <br /> MONITORING TOP OF CASING STATIC WATER LEVEL <br /> NUMBER <br /> WELL (FEET ABOVE DATUM) WATER BELOW BELOW <br /> { <br /> s` LEVEL* DATUM MW-2 <br /> MW-1 0.103 <br /> !.'. MW-2 0.00 14.813 19.714 0.026 <br /> 14.688 14.688 O.OQ <br /> bW-3. 1.21 15.906 14.696 0.008 <br /> T <br /> If Measurements. in feet. <br /> ! *. Static water level measured in feet below top of casing <br /> Datum. is an arbitrary elevation corresponding to the top of the <br /> lowest well casing . <br /> The measured differences in ground water elevation are within the <br /> .a <br /> error ranges of the Leitz Auto Level and the ground water level <br /> detector'. The local ground water gradient is less than <br /> detectable by our instruments at the time of the measurement and <br /> is therefore.essentially .level. However, local groundwater <br /> gradients fluctuate in response to many factors. Factors which <br /> influence local groundwater gradients include localized pumping <br /> and seasonal changes. <br /> 1.0 <br /> A0,P119? F OdPIL7Sh���lJ9S <br />