USDA SEDIMENT STANDARD
No. 1 (acceptable)-not to exceed 0.50 mg. or equivalent.
No. 2 (acceptable)-not to exceed 1.50 mg. or equivalent.
No. 3 (probational, not over 10 days)-not to exceed 2.50 mg. or equivalent.
No. 4 (reject)-over 2.50 mg. or equivalent.
This procedure of retesting successive shipments and accepting probational (No. 3) milk and rejecting No. 4 milk may be continued for not more than 10 calendar days. If at the end of this time all of the producer's milk does not meet the acceptable sediment content classification (No. 1 or No. 2), it shall be rejected.
7 C.F.R. §58.134