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EXPLANATION OF SYMBOLS ON <br /> EXPLORATORY BORING LOGS <br /> • (CONTINUED) <br /> Ground—Water Level Column r <br /> Y 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 Slows required to drive sampler 1 foot into soil . <br /> Standard drive hammer weight: 140 pounds. i <br /> Standard drop: 30 inches i <br /> f <br /> 1 <br /> f <br />