Estimate the mass and voluume of sludge produced from untreated wastewater without and with use of ferric chloride for the enhanced removal of TSS. Also estimate the amount of lime required for the specific ferric chloride dose. Assume that 60 % of the TSS is removed in the primary settling tank without the addition of chemicals, and that the addition of ferric chloride results in an increased removal of TSS to 85 %. Also, assume that the following data apply to this situation: