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EXPLANATION OF SYMBOLS ON <br /> . EXPLORATORY BORING LOGS <br /> (CONTINUED) <br /> Ground—Water Level Column <br /> DEPTH TO FIRST OBSERVED GROUND WATER <br /> DEPTH TO STABILIZED GROUND WATER f <br /> Miscellaneous <br /> 2. 5 YR 6/2 Color as field checked to Munsell Soil Color Chart <br /> ( 1975 Edition) <br /> PENETRATION Blows required to drive sampler 1 foot into soil . <br /> Standard drive hammer weight: 140 pounds. i <br /> Standard drop: 30 inches <br /> i <br /> 1 <br /> I <br /> l <br /> • I <br />- f - <br />