Maryland Code, Environment § 9-237

(a) A sewage sludge utilization permit authorizes the permit holder to utilize sewage sludge according to the terms of the permit.

(b) Except as provided in subsection (c) of this section, if the utilizer is unable to utilize the sewage sludge as defined in the permit, the utilizer may return the sewage sludge to the generator provided that the utilizer obtains a new comprehensive analysis of the sewage sludge to be returned that indicates that:

(c) If the utilizer returns the sewage sludge within 96 hours of the departure from the generator, the utilizer may not be required to obtain a new analysis of the sewage sludge.