In determining whether any waste discharged or proposed to be discharged into any public sewer is to be excluded, consideration will be given to the quantity, time or times, rate and manner of discharge, dilution and character of the waste in question, the size of the sewer into which the waste is to be discharged, the probable quantity of sewage or other wastes likely in said sewer and other pertinent facts. Minute quantities of a waste which would be objectionable in larger quantity may be accepted if sufficiently diluted when and as discharged or if the quantity discharged is small as compared with the flow in the receiving sewer, but any permission to discharge minute quantities of an otherwise excluded waste shall be revocable at any time by the village.