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NOTICE TO REPORT USERS BORING LOG INFORMATION <br /> <br />Subsurface Profiles <br /> <br />The subsurface stratification lines on the graphic representation of the test borings show an <br />approximate boundary between soil types or rock. The transition between materials is approximate <br />and is usually far more gradual than shown. Estimating excavation depths, soil volumes, and other <br />computations relying on the subsurface strata may not be possible to any degree of accuracy. <br /> <br />Water Level <br /> <br />WSB & Associates, Inc. took groundwater level readings in the exploratory borings, reviewed the data <br />obtained, and discussed its interpretation of the data in the text of this report. The groundwater level <br />may fluctuate due to seasonal variations caused by precipitation, snowmelt, rainfalls, construction or <br />remediation activities, and/or other factors not evident at the time of measurement. <br /> <br />The actual determination of the subsurface water level is an interpretive process. Subsurface water <br />level may not be accurately depicted by the levels indicated on the boring logs. Normally, a <br />subsurface exploration obtains general information regarding subsurface features for design purposes. <br />An accurate determination of subsurface water levels is not possible with a typical scope of work. <br />The use of the subsurface water level information provided for estimating purposes or other site <br />review can present a moderate to high risk of error. <br /> <br />The following information is obtained in the field and noted under "Water Level Measurements" at the <br />bottom of the log. <br /> <br /> Sample Depth: The lowest depth of soil sampling at the time a water level <br /> measurement is taken. <br /> <br /> Casing Depth: The depth to the bottom of the casing or hollow stem auger <br /> at the time of water level measurement. <br /> <br /> Cave-in Depth: The depth at which a measuring tape stops in the bore hole. <br /> <br /> Water Level: The point in the bore hole at which free-standing water is <br /> encountered by a measure device from the surface. <br /> <br />Obstruction Depths <br /> <br />Obstructions and/or obstruction depths may be noted on the boring logs. Obstruction indicates the <br />sampling equipment encountered resistance to penetration. It must be realized that continuation of <br />drilling, the use of other drilling equipment or further exploration may provide information other than <br />that depicted on the logs. The correlation of obstruction depths on the log with construction features <br />such as rock excavation, foundation depths, or buried debris cannot normally be determined with any <br />degree of accuracy. For example, penetration of weathered rock by soil sampling equipment may not <br />correlate with removal by certain types of construction equipment. Using this information for <br />estimating purposes often results in a high degree of misinterpretation. <br /> <br />Accurately identifying the obstruction or estimating depths where hard rock is present over the site <br />requires a scope of service beyond the normal geotechnical exploration program. The risk of using the <br />information noted on the boring logs for estimating purposes must be understood.