1. to confine a potential source of contamination to the non-potable system being served 2. to provide a backflow prevention mechanism at each actual or potential cross-connections.
any of a number of mineral substances that will burn, such as asphalt, petroleum and naptha.
any of various light-weight vitreous materials produced in the form of fibers that resemble wool or glass and are used after conversion into granular form, felted form (as in batts, blankets, or boards) or molded form, chiefly in heat and sound insulation in insulating cements, and as filter media, (i.e.: an insulated blanket of mineral […]
1. the liquor overlying deposited solids. 2. the liquid in a sludge-digestion tank which lies between the sludge at the bottom and the floating scum at the top.
a mixture of activated sludge and sewage in the aeration tank undergoing activated sludge treatment.
1. any liquid 2. water sewage 3. industrial sewage, or any combination of the three.
See MERCURY – a heavy silver- white univalent and bivalent poisonous metallic element that is liquid at ordinary temperatures. It is used chiefly in scientific instruments, mercury boilers, mercury pumps, and mercury vapor lamps.