Sample 	Microbiological 	Electrochemical
1 	129.5 	132.3
2 	89.6 	91.0
3 	76.6 	73.6
4 	52.2 	58.2
5 	110.8 	104.2
6 	50.4 	49.9
7 	72.4 	82.1
8 	75.0 	73.4
9 	34.1 	38.1
10 	60.3	60.1