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<br />TERMINOLOGY ON BORING LOGS <br />GROUND WATER <br /> <br />Ground water information is shown on boring logs: <br />Measurements" and 2) in the "WB" column. <br /> <br />1) under "Water Level <br /> <br />Information under Water Level Measurements includes: <br /> <br />The depth to the water level (or drilling fluid, if used) and the depth to <br />the bottom of the hole (cave-in). Water level and cave-tn measurements are <br />taken with a weighted measuring tape. If free-standing water is not <br />encountered in the hole. the term wet. or dry, is indicated under "Water <br />Level." This means that the soil adhering to the end of the measuring tape <br />did. or did not, respectively. appear to be saturated. <br /> <br />The depth sampled and the depth of casing (or hollow-stem auger) for <br />measurements made during the progress of the boring. <br /> <br />Date and time of measurements. <br /> <br />Notation in the WB (waterbearing) <br />to be waterbeari ng or saturated. <br />questionable or indefinite. <br /> <br />column describes whether soil samples appear <br />IIY" means yes, IIN" means no, and II?II means <br /> <br />Frozen soil which has thawed appears saturated. This ~ account for an iso- <br />lated "Y" symbol near the top of the WB column on a boring log. <br /> <br />., ""~ <br /> <br />Determination of the depth to the ground water table is an interpretive process. <br />The determination is based on various factors, including: water level measure- <br />ments, the presence and type of drilling fluid, the appearance of samples, sub- <br />surface conditions. site conditions. and weather conditions. <br /> <br />The water level symbol, ~. in the WB column indicates the apparent depth to the <br />ground water table at the bore hole. The accuracy of the indicated depth to the <br />ground water table can be quite variable. The water level symbol with an arrow <br />pointed downward (or upward) indicates that the water level is at or below (or <br />above) the level indicated. Absence of the water level symbol does not <br />necessari ly mean ground water was not encountered. or that the water table or <br />piezometric surf~ce was not penetrated. <br /> <br />The presence of ground water in the soil and the level of the ground water table <br />can change w1th time. The information in the WB column is based on observations <br />and measurements made at the time the bori ng was dri 11 ed and the water level <br />measurements were taken. <br /> <br />F ~ J:C I <br /> <br />Df"I T'f"I <br />