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Table 1 <br /> Hydrostratigraphic Zones <br /> Ripon PCE Investigation Work Plan <br /> The table below provides the depths and general lithologies of the hydrostratigraphic zones. <br /> Approximate <br /> Depth Range <br /> Aquifer Interval Hydrostratigraphic Zone (feet bgs) General Lithology <br /> Upper B 25-40 Water table zone,primarily <br /> silty sand <br /> A 50-110 Sand and gravel with fine- <br /> grained interbeds <br /> Intermediate C1 124-135 Poorly graded sand and <br /> gravel <br /> C2 170-187 Poorly graded sand <br /> Corcoran Clay Aquitard 187-206 Green plastic clay <br /> Lower D 206-236 Poorly graded sand <br /> Note: <br /> bgs below ground surface <br /> TABLE 1 HYDROSTRATIGRAPHIC ZONES.DOCX Page 1 of 1 PROJECT NO.631021512 <br />