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Depth from Surface <br /> Description <br /> (Feet to Feet) <br /> 75 77 sand <br /> 77 79 hard clay <br /> 79 88 sand <br /> 88 97 clay <br /> 97 99 sand <br /> 99 108 clay <br /> 108 118 sand <br /> 118 128 hard clay <br /> 128 138 gravel <br /> 138 144 clay <br /> 144 148 sand <br /> 148 151 clay <br /> 151 153 sand and clay <br /> 153 182 hard clay <br /> 182 185 sand and clay <br /> 185 191 coarse sand <br /> 191 197 clay <br /> 197 204 sand <br /> 204 231 clay <br /> 231 272 sand <br /> 272 277 coarse sand <br /> 277 291 clay <br /> 291 294 sand <br /> 294 311 clay <br /> 311 318 sand and clay <br /> 318 337 hard clay <br /> 337 341 sand <br /> 341 350 sand and clay <br /> 350 365 clay <br /> 365 376 sand <br /> 376 379 sand and clay <br /> 379 394 coarse sand <br /> 394 401 clay <br /> 401 411 sand <br /> 411 421 hard clay <br /> 421 424 sand and clay <br /> 424 431 clay <br /> 431 434 sand <br /> 434 471 clay <br /> DWR Form 188 rev 10/09/2025 Page 2 of 4 <br />