It is important to maintain septic systems in order to _______.
Aprevent treated sewage from contaminating groundwater
Bprocess human waste into fertilizer
Cprevent untreated sewage from contaminating groundwater
Dnone of the above
Aprevent treated sewage from contaminating groundwater
Bprocess human waste into fertilizer
Cprevent untreated sewage from contaminating groundwater
Dnone of the above