All users shall be classified by assigning each one to a standard classification category according to the principal activity conducted on his premises based on the typical wastewater strength for that type of user as determined by the Authority. The purpose of such classification is to facilitate the regulation of wastewater discharges based on quality, quantity and flow to provide an effective means of source control and to establish a system of wastewater service charges and fees which will ensure an equitable recovery of the Authority's cost. The elements of quality may include but not be limited to the following: suspended solids, COD, oil and grease and chlorine demand.