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CONDOR -ax:2095320773 Rpr 15 10:55 P. 11 <br /> ....e. c.,.a..cw.mn. <br /> VERTICAL LITHOLOGIC <br /> SCALE (ff) SUMMARY MW-4A MW-4B <br /> o WELL 48 <br /> SAND <br /> fine to medium grained <br /> 10 moderately sorted, subrounded <br /> 20 20ft <br /> GRAVEL APPROX. <br /> 20 ft <br /> poorly sorted, subrounded <br /> 30 <br /> GRAVEL <br /> well sorted, subangular <br /> 40 SANDY GRAVEL <br /> medium to very coarse grained <br /> 50 poorly sorted, subrounded <br /> SILTY SAND <br /> 60 SILT TO CLAYEY SILT <br /> CLAYEY SILT 65 <br /> 70 SAND CHLOROFORM <br /> SILTY SAND CONCENTRATION <br /> 80 SAND (Date: 226/91 ) <br /> SAND AND GRAVEL <br /> SILTY SAND 85 <br /> 90 SAND <br /> SANDY SILT <br /> 100 SANDY GRAVEL <br /> 110 SAND <br /> SAND <br /> 120 117 CHLOROFORM <br /> SILTY SAND CONCE TRATION <br /> ND. <br /> 130 SAND not delectable2) <br /> SILTY SAND SCREENED Date: 2/26/91) <br /> INTERVAL 137 <br /> 140 <br /> 1 Summarized from core descriptions of borehole NW-48 in Final Report, <br /> Phase 11 Groundwater Investigation Program, September 25, 1990 <br /> 2 Detection Limit = 0.50 ug/L <br /> DEPTH OF CHLOROFORM CONCENTRATIONS <br /> WELL CLUSTER MW-4 <br /> TRIPLE E PRODUCE, TRACY, CALIFORNIA <br /> FIGURE 1 <br />