I grew up near Tacoma, WA with a septic tank. Every house on the street has one. We had to have a septic truck come out and pump it every few years. Otherwise i

I grew up near Tacoma, WA with a septic tank. Every house on the street has one. We had to have a septic truck come out and pump it every few years. Otherwise it was just like sewer. They did put sewers in about 15 years after the houses were built, and mandated hooking into it on the next septic tank pumping. But the tanks are left underground, as removing them would leave a 20 foot hole in the backyard of each house. In short, what's this about tossing your stool in the trash?