I Vm BELOW wAteH LEveL\ 



10 









IS 











20 







I ccwTPoc cunr\ 



^^^^^^ 



25 

























1 



J 1 1 1 1 



1 1 1 1 1 1 1 1 1 1 1 1 



10 IS 20 2S 



30 36 40 43 5O5S6065 

 PERCENT UaSTURE BY VOLUUE 



70 7S 80 ee 90 9S 100 



10 15 20 2S 50 38 40 

 EffROR-X UOrSTWfF 



I mo FULL 



40 



SMdtsx full I 



30 3B 40 45 so SB 60 65 70 75 W 

 PggCCTT mtSmtt-bf VOLUME 



19 20 25 30 35 



I VOID 50% FULL I 



30 38 40 46 SO 56 60 68 70 78 



PFWcm tmruRE by volume 



ao 86 90 96 



a 20 25 30 

 ERRORS MOISTURE 



woiD isu mm 



10 













E 25 





8: 



so 





11 ° ' 



S/U0>L£ OJHVE 



tame 



36 40 46 80 96 60 66 70 79 



PERCENT MOISTURE BY VOLUME 



80 86 90 99 100 



-SOS 

 ERROR -X MOISTURE 



WOID EMPTY\ 



'ONTROL cunve 



BHxm 



30 39 40 49 90 SS 60 68 70 75 80 88 90 9SI00 



PERCENT MOISTURE BY VOLUME 



-5 5 

 ERROR -X MOISTURE 



Figure 9. — The variation in neutron moisture measurements between control and sample tanks containing 

 small voids is shown. Measurements were made using fine sand as the porous medium when the water level 

 was changing with respect to the void. 



