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- yGro <br /> 2 <br /> EXPLANATIOH.OF SYMBOLS ON <br /> CXPLORATORY BORING LOGS "t# <br /> (CONTINUED) <br /> s <br /> Ground-Water Levw Calumn <br /> :. <br /> DEPTH TO FIRST OBSERVED 6ROUHD MATER 1 <br /> DEPTH TO STABILIZED Gt60UN0 HATER <br /> 14 q <br /> Miscellaneous E <br /> 2.$ YR 6/2 Color as field chocked to Mun <br /> (1975 Edition) sell Soil Color Chart <br /> -v <br /> PENETRATION � <br /> Blows required to drive sampler I foot <br /> Standard drive hammer weight: 140 into soil. <br /> into <br /> Standard drop: 3Q inches <br /> ni•, <br /> ti <br /> 41 <br /> � <br /> `1 <br /> i3 <br /> "4 <br /> ti; <br />