Diameter of tank = 79.25 m = 260.0 ft

Total no of Readings = 32 Nos.

Location P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P30 P31 P32

Location 0 11.3 22.5 33.8 45 56.3 67.5 78.8 90 101.3 112.5 123.8 135 146.3 157.5 168.8 180 191.3 202.5 213.8 225 236.3 247.5 258.8 270 281.3 292.5 303.8 315 326.3 337.5 348.8

2008 Reading(ELEVmeasured) in m 13.938 13.942 13.943 13.942 13.928 13.910 13.892 13.883 13.887 13.895 13.905 13.912 13.908 13.913 13.904 13.909 13.903 13.908 13.912 13.918 13.920 13.921 13.923 13.914 13.910 13.914 13.922 13.931 13.939 13.945 13.943 13.941 13.918

2008 Reading(ELEVmeasured) IN ft 45.728 45.741 45.745 45.741 45.696 45.636 45.577 45.548 45.561 45.587 45.620 45.643 45.630 45.646 45.617 45.633 45.614 45.630 45.643 45.663 45.669 45.673 45.679 45.650 45.636 45.650 45.676 45.705 45.732 45.751 45.745 45.738 45.663

Corrected 2008 45.627 45.640 45.644 45.640 45.595 45.535 45.476 45.447 45.460 45.486 45.519 45.542 45.529 45.545 45.516 45.532 45.513 45.529 45.542 45.562 45.568 45.572 45.578 45.549 45.535 45.549 45.575 45.604 45.631 45.650 45.644 45.637

Reading(in 2004) IN ft 45.636 45.643 45.574 45.466 45.459 45.502 45.528 45.525 45.518 45.545 45.564 45.545 45.538 45.568 45.636 45.646

Readings on hydrotest after construction45.587 45.610 45.636 45.620 45.620 45.653 45.719 45.719 45.702 45.709 45.627 45.545 45.561 45.571 45.587 45.587

Readings after construction 45.627 45.669 45.682 45.656 45.646 45.679 45.758 45.751 45.728 45.741 45.643 45.571 45.574 45.623 45.643 45.627

Mean IN m 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918 13.918

Mean IN ft 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663 45.663

Diff in m -0.020 -0.024 -0.025 -0.024 -0.010 0.008 0.026 0.035 0.031 0.023 0.013 0.006 0.010 0.005 0.014 0.009 0.015 0.010 0.006 0.000 -0.002 -0.003 -0.005 0.004 0.008 0.004 -0.004 -0.013 -0.021 -0.027 -0.025 -0.023

Diff in ft -0.066 -0.079 -0.082 -0.079 -0.033 0.026 0.085 0.115 0.102 0.075 0.043 0.020 0.033 0.016 0.046 0.029 0.049 0.033 0.020 0.000 -0.007 -0.010 -0.017 0.013 0.026 0.013 -0.013 -0.043 -0.069 -0.089 -0.082 -0.076 0.000

Syy 0.1006

diff of ELEVpred in ft OR RIGID

PLANE SETTLEMENT 45.7301 45.7241 45.7165 45.7074 45.6974 45.6865 45.6755 45.6646 45.6544 45.6450 45.6371 45.6308 45.6263 45.6239 45.6237 45.6256 45.6296 45.6356 45.6432 45.6523 45.6623 45.6732 45.6841 45.6951 45.7053 45.7146 45.7226 45.7289 45.7334 45.7358 45.7360 45.7341

DIFF, Ui IN ft -0.002 0.017 0.028 0.034 -0.002 -0.050 -0.098 -0.117 -0.093 -0.058 -0.017 0.012 0.004 0.022 -0.007 0.008 -0.016 -0.006 0.000 0.010 0.007 -0.001 -0.005 -0.045 -0.069 -0.065 -0.047 -0.024 -0.002 0.016 0.009 0.004

Si IN ft -0.0125 0.0041 0.0025 0.0208 0.0062 -0.0001 -0.0147 -0.0210 -0.0061 -0.0026 0.0057 0.0190 -0.0138 0.0240 -0.0219 0.0191 -0.0171 0.0025 -0.0025 0.0070 0.0020 -0.0016 0.0180 -0.0085 -0.0136 -0.0073 -0.0024 0.0007 0.0023 0.0120 -0.0011 0.0006

Si in inch -0.1496 0.0492 0.0305 0.2501 0.0742 -0.0010 -0.1768 -0.2518 -0.0734 -0.0309 0.0685 0.2281 -0.1650 0.2886 -0.2626 0.2289 -0.2047 0.0295 -0.0305 0.0846 0.0243 -0.0187 0.2161 -0.1025 -0.1628 -0.0872 -0.0292 0.0081 0.0272 0.1445 -0.0130 0.0073

SSE 0.056

R^2= 0.4459 should be > = 0.9 0.0101

max-min 0.062 m 2.441 INCH 0.0101

0.115 -0.089 2.441 INCH

MAX MIN diff

13.945 13.883 0.062 m

FOLLOWING CALCULATION ARE BASED ON API 653

CIRCUMFERENCE OF THE TANK = pi() * D = 816.81 ft

DISTANCE BETWEEN READINGS L = pi() * D/ NO. OF READINGS = 25.53 ft 7.780 m

FOR 32 READINGS SPACING BETWEEN POINTS IS = 25.53 ft

HEIGHT OF THE TANK IN FT = H = 64.26 ft

YIELD STRENGHT = Y = 30000 PSI

YOUNG'S MODULUS = E = 3E+07 PSI

MAXIMUM PERMISSIBLE OUT-OF-PLANE DELECTION ISI <= (L^2 X Y X 11) / (2(EXH)) = 0.0558 ft

WITH 32 POINTS = 0.6692 INCH

A = 45.68

B = 0.0563

C = 26.879

ELEVpred

EQ1 @ 0deg/P1 = 45.7301 OK 0.177

EQ2 @ 78.8deg/P8 = 45.6646 OK 0.066

EQ3 @ 168.8deg/P16 = 45.6256 OK 0.187

PREDICTED ELEVATION

ELEVpred = A + {B X COS((TETA+C)*pi()/180)}

Syy = SUM((ELEVATIONaverage - ELEVATION measured)^2)

SSE = SUM((ELEVATIONmeasured - ELEVATION pred)^2)

R^2 = (Syy-SSE)/Syy

Ui = ELEVmeasured - ELEVpred

Si = Ui - ((Ui-1 + Ui+1 )/2)

COS TANK-12 - FOUNDATION SETTLEMENT

CHECK ON THE MEASUREMENT OF INSIDE THE TANK ANNULAR PLATE TOP LEVEL READING TAKEN IN 2008