ANALYSIS FOR PIER14 

 (FPO-1 SAMPLE) 



STANDARD DEVIATION= 

 ORIGINAL STD DEV. = 



1.134 MEAN DIAMETER = 11.94 

 0.988 MEAN (ORIGINAL)= 12.08 



COEFFICIENT OF VARIATION (SAMPLE DIAMETER).. = 0.09 

 COEFFICIENT OF VARIATION (ORIGINAL DIAMETER)= 0.08 

 COEFFICIENT OF VARIATION FOR CROSS-SECTION = 0.18 



TOTAL NUMBER OF PILES INSPECTED (LEVEL I&II)= 

 NUMBER OF PILES WITH DIAMETER MEASUREMENTS = 



350 

 205 



PERCENTAGE OF PILES WITH BORER ACTIVITY = 30.0 



STANDARD ERROR OF PROPORTION = 2.4% 



INTERVAL PERCENT PERCENT CUMULATIVE 



(INCHES) NUMBER OBSERVED EXPECTED Z-VALUE PERCENT 



7 1 0.48 0.000 -3.9215 0.0000 



8 1 0.48 0.000 -3.0401 0.0000 



9 5 2.43 1.555 -2.1586 0.0155 



10 15 7.31 8.542 -1.2771 0.1009 



11 62 30.24 24.523 -.3956 0.3462 



12 78 38.04 34.015 0.4857 0.6863 



13 29 14.14 22.759 1.3672 0.9139 



14 13 6.34 7.369 2.2487 0.9876 



15 1 0.48 1.234 3.1301 1.0000 



TYPE OF 



AREA 



EQUIVALENT 



ESTIMATED 



MAINTENANCE 



REMAINING 



DIAMETER 



PERCENT 



NONE 



>95% 



>11.0 



78.2% 



WRAP 



75-95% 



9.8 - 11.0 



18.6% 



CONCRETE JACKET 



50-75% 



8.0 - 9.8 



3.1% 



REPLACEMENT 



<50% 



< 8.0 



0.0% 



C-5 



