Q9. When a septic tank is being constructed, the length should be at least how many times larger than the width?

Q10. For a tile field in soil composed of clay and gravel, you should dig a trench of what minimum width?

Q11. An eight-seat field-type latrine can be expanded to how many additional seats?

Q12. What control runs the wash, the rinse, and the spin cycle of a skid-mounted laundry unit washer?

Q13. A lyster bag is primarily used for dispensing what types of water?

Q14. The 3000-D diatomite waterpurification unit should be locatedd what distance above the water supply?

Q15. What water purification unit purifies water by reducing dissolved and suspended solids?