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. 2001 Sep;67(9):4036–4040. doi: 10.1128/AEM.67.9.4036-4040.2001

TABLE 1.

Biosolid classification at 3 and 6 months

Time (mo) Classification
Class A % (n) Class B % (n) Class Ca % (n) Indeterminateb % (n) Total (n)
3 19.4 (13) 70.6 (48) 6.0 (4) 3.0 (2) 67
6 35.8 (29) 60.5 (49) 0 3.7 (3) 81
a

Samples with fecal coliform levels exceeding those of class B (MPN, >2 × 106). 

b

Not able to determine class.