(1)References in this Chapter to sending biodegradable waste, or biodegradable municipal waste, to landfills do not include—
(a)the spreading of sludges (including sewage sludges and sludges resulting from dredging operations), or similar matter, on the soil for the purposes of fertilisation or improvement,
(b)the deposit of non-hazardous dredging sludges alongside small waterways from out of which they have been dredged,
(c)the deposit of non-hazardous sludges in surface water or in the bed or subsoil of surface water, or
(d)the deposit of unpolluted soil resulting from—
(i)prospecting for, or the extraction, treatment or storage of, mineral resources, or
(ii)the operation of quarries.
(2)For the purposes of this section, sludge is “non-hazardous” if it is not hazardous waste for the purpose of Council Directive 91/689/EEC.