worn BELOW WATER LEVEL\ 



S/tMfLE CUIfVE 



lEKROR CURVE 



30 35 40 45 50 55 60 6S 

 PERCENT UOISTURE BY VOLUUE 



70 75 80 85 90 95 100 



15 20 25 50 35 40 45 50 .55 

 ERROR- XUaSTURE 



Wo ID FULL\ 



ERtfOfi CURVE 



B 



15 20 25 30 35 40 45 50 55 60 _65 70 75 80 85 90 95 100 



'^Sht uoisture by VODJME 



15 20 25 30 35 40 45 50 55 

 EtIMl-XUaSTVRE 



WOID 75% FUU\ 



J L 



15 20 25 30 35 40 4S 5OSS 606S7O 75 80 89 90 

 PERCENT UOISTURE BY VOLUME 



ERROR CURVE 



15 20 25 30 35 

 ERROR- XUaSTURE 



40 45 50 55 



\me SOX fUll\ 



20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 



pbxent uoisture by VOUJUE 



B 20 25 30 35 40 

 ERROR-XUaSTURE 



WOID 25% FUlI] 



SAMPL£ CURIAE 



,E/ff>Off 

 CURVE 



15 20 25 30 35 40 45 50 55 60 65 

 PERCEHT MOISTURE BY VOUJUE 



70 75 80 85 90 95 100 



+5 ♦lO +15 + 20 + 25 + 30 

 ERROR -X UOISTURE 



WOID EMPTY\ 



% 45 



£ 50|- 

 95 

 ISO 



E 











































1 



1 



— 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 



20 29 30 39 40 49 50 

 flfflCf/Vr ttOISTURE BY 



55 60 69 

 VOUJUE 



70 75 80 85 90 99 100-15 



+5 +10 +19 

 ERROR- XUOISrURE 



Figure 10. - The variation in neutron moisture measurements between control and sample tanks containing 

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

 was changing with respect to the void. 



