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LEA Advisory 20 Attachment- Inspection Guidance for SW Landfills Page 40 of 52 <br /> Measurements (length, width and height) of each waste tire unit must be obtained. This can be done <br /> using a steel tape measure or a hip chain unit. It is good practice to have someone available to assist <br /> in measuring large waste tire units. When practicable, the height of waste tire piles should be <br /> measured directly, using a steel tape measure or yard stick. Direct measurement of the height of the <br /> waste tire unit should be done when the top of the tire pile is within reach of the inspector while <br /> standing at the base of the unit. <br /> When measurement of the height of a waste tire pile is impracticable and unreliable, indirect means <br /> of measuring should be employed. The height of a waste tire unit can be measured indirectly in one <br /> of the following ways: <br /> Method 1. Step off a known distance from the pile and measure the angle between eye level and the <br /> top of the tire pile at that point. See Figure 1 below. A clinometer can be used to measure the angle. <br /> The known distance from the pile (distance "a") and the angle measured(angle "a ") should be <br /> recorded. The known distance from the waste tire unit should be doubled and a second angle <br /> measurement taken at that point. This angle("_") should be recorded. Calculate the height of the pile <br /> using the following formula: <br /> Tire pile height (h) = a x tangent a x tangent 6+eye level lit. <br /> tangent a-tangent 6 <br /> ..................._.........._...._.................. . _ ............. ........ .. <br /> i <br /> Figure 1 - method(I) of measuring tire pile height indirectly. <br /> http://www.ciwmb.ca.gov/pe/advisory/20/attach20/20attchl.htm 8/11/98 <br />