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CITY OF SANTA ANA <br />Planning and Building Agency <br />Borehole No. PC-2 <br />Date <br />Time of <br />Reading <br />At <br />(min.) <br />Total <br />Elapsed <br />Time (t) <br />Average <br />t <br />(minutes) <br />Reading R, <br />(inches) <br />Reading R2 <br />(inches) <br />Drop <br />d <br />(inches) <br />R= <br />(min <br />7Vf <br />/i <br />t/ <br />to (in� <br />k * 1000 <br />(cm/s) <br />6/12/2024 <br />9:05 AM <br />0 <br />0 <br />/ <br />5 <br />18.00 <br />8.00 <br />4.00 <br />33.9 <br />9:15 AM <br />10 <br />10 <br />10.00 <br />1.25 <br />9:25 AM <br />10 <br />20 <br />15 <br />18.00 <br />24.00 <br />6.00 <br />1.67 <br />9.00 <br />25.4 <br />9:35 AM <br />10 <br />30 <br />25 <br />20.50 <br />24.50 <br />4.00 <br />2.50 <br />10.00 <br />16.9 <br />9:45 AM <br />10 <br />40 <br />35 <br />24.50 <br />28.00 <br />3.50 <br />2.86 <br />12.25 <br />14.8 <br />9:55 AM <br />10 <br />50 <br />45 <br />10.00 <br />13.00 <br />3.00 <br />3.33 <br />13.50 <br />12.7 <br />10:05 PM <br />10 <br />60 <br />55 <br />13.00 <br />16.00 <br />3.00 <br />3.33 <br />16.50 <br />12.7 <br />10:15 PM <br />10 <br />70 <br />65 <br />16.00 <br />19.00 <br />3.00 <br />3.33 <br />19.50 <br />12.7 <br />10:25 PM <br />10 <br />80 <br />75 <br />19.00 <br />22.00 <br />3.00 <br />3.33 <br />22.50 <br />12.7 <br />10:35 PM <br />10 <br />90 <br />85 <br />22.00 <br />25.00 <br />3.00 <br />3.33 <br />25.50 <br />12.7 <br />Plot: t/R as ordinate vs. T as abscissa; tanOC = K. <br />R, = Vertical distance from reference point to water level after refilling at beginning of increment period. <br />R2 = Vertical distance from reference point to water level at the end of increment period. <br />R = 1/K at equilibrium rate. <br />1 1 1 1 �1 1 •1 1 :1 •1 <br />ar ara Catholic School - Percolation ests Project: 7 <br />306 West McFadden Avenue, Santa Ana, CA IPlate:_1 <br />E TE HNI AL SOLUTIONS, INC. <br />CE I <br />