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C~ <br />INCLINOMETER INSTALLATIONS <br />Inclinometer surveys are subject to some variation in results <br />due to limitations in instrument accuracy and reproducibility. In <br />addition, displacements of the incinometer casing may occur which are <br />not related to slope movement. Such displacements frequently occur <br />due to settlement of the backfill around the casing, and are the reason <br />why particular care is taken in the field to obtain a dense backfill. <br />Variations in readings which are not related to slope movement can be <br />identified by the following characteristics: <br />• They are random in direction (this can lead to anomalous <br />situations of apparent displacements in an uphill direction); <br />e They are relatively small for a properly installed inclinometer; <br />r~ <br />L <br />• <br />• They do not increase consistently with time. <br />Inclinometer I1 (Crushing and Screening Level Fill East) <br />Due to modifications made to the inclinometer casing after installation <br />the initial two sets of baseline data are no longer usable. Tvo sets of <br />readings were taken on the current field trip; these will provide new base- <br />line data. <br />Any future disturbance of inclinometer installations may result in <br />previously accumulated data being invalidated. At best, the accuracy with <br />which new and old readings can be compared will be compromised. <br />Inclinometer I2 (Crushing and Screening Level Fill West) <br />Changes in data readings are small, indicating the inclinometer is <br />well installed. Total deflections are generally less than 0.1 inch, indicating <br />that no significant movement of the fill has occurred since the installation. <br />The relatively large deflection at the top of the installation (0.10 inches <br />at 8 feet) is probably due to placing a berm around the inclinometer subsequent <br />to the initial readings. <br />-7- <br />sEa~+mxo cor~wtnr~, iNC. <br />