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14 r <br /> r Mr.Jadi Singh <br /> January 24,2003 <br /> Job Number:LE02-381 <br /> 4+ Page 6 <br /> As mentioned previously, ground-water monitoring had occurred on the site by Fluor Daniel GTI <br /> between November 1993 and March 1997 within three monitoring wells. Examination of the <br /> records indicates that the depth to water on the north side of the property at the former <br /> monitoring well MW-3 ranged between 5.13 feet in April 1996 and 11.22 feet in November <br /> +„ 1994. .The average depth of the 11 measurements in MW-3 was 8.81 feet. The other wells have <br /> similar measurements. The monitoring wells have since been removed. <br /> �+ 4.3 Ground Water Quality <br /> One ground-water sample was collected by Neil O. Anderson and Associates, Inc. on November <br /> i' 22, 2002 from ground water within the 14-foot deep boring, and was analyzed by Precision <br /> Enviro-Tech of Stockton, California, for the presence of common constituents. Please refer to <br /> the appendix for the laboratory results. Following is a summary of the results obtained: <br /> 4 <br /> Table 2. <br /> Summary of common constituents in ground water sample. <br /> ... Chemical Result Units Chemical Result Units <br /> Total Hardness 330.0 mg/L Nitrate(NO3) 4.0 mg/L <br /> Calcium 70.0 mg/L Nitrate as N(NO2) ND mg/L <br /> Magnesium 40.0 mg/L Ammonia as N(NH3) ND mg/L <br /> .r Sodium 95.0 mg/L Total Kjehdahl Nitrogen(TKN) ND mg/L <br /> Potassium 2.0 mg/L Total Nitrogen(TN) 0.9 mg/L <br /> Total Alkalinity 198.0 mg/L Fluoride ND mg/L <br /> Hydroxide ND mg/L pH 6.53 Std.Units <br /> Carbonate ND mg/L Specific Conductance 844 µmhos/cm <br /> Bicarbonate 488.0 mglL Total Filterable Residue 610.0 mg/L <br /> Sulfate 150.0 mg/L MBAS ND mg/L <br /> Chloride 25.0 1 mg/L <br /> Examination of the water report indicates the ground water contains low concentrations of <br /> &W nitrogen. Nitrogen is a common contaminant in shallow aquifers in San Joaquin County. It is <br /> Vr <br /> M <br /> � W <br /> Q ~ <br /> 7jS0�.\ <br /> f <br />