A recently published study by researchers at Arizona State University estimates that every year a city of 1 million people will have $13 million worth of metals, including gold and silver, accumulate in biosolids after sewer treatment.Precious and not so precious items go down the drain continually. In homes with onsite systems those items are ending up in the septic tank, only to be found when the tank is pumped. Shaylin King shared a story with us at last year’s Pumper & Cleaner Expo about his little brother tagging along while the family business pumped a septic tank. The boy
