R 325.10102 Definitions; A, B.

Rule 102. As used in these rules: (a) "Act" means 1976 PA 399, MCL 325.1001 to 325.1023 and known as the safe drinking water act. (b) "Action level" means the concentration of lead or copper in water as specified in R 325.10604f(1)(c) that determines, in some cases, the treatment requirements that a water supply is required to complete. (c) "Advisory board" means the advisory board of examiners appointed by the director under section 9(2) of the act. (d) "Alteration" means the modification of, or addition to, an existing waterworks system, or portion of the system, that affects any of the following: (i) Flow. (ii) Capacity. (iii) System service area. (iv) Source. (v) Treatment. (vi) Reliability. (e) "Approved analytical technique" means a calculation, determination, or other laboratory examination or procedure that has been approved by the United States Environmental Protection Agency under 40 C.F.R. part 141, which is adopted by reference in R 325.10605. (f) "Approved basement" means a basement which has walls and a floor that are constructed of concrete or its equivalent, which is essentially watertight, which is effectively drained, and which is in daily use. (g) "Aquifer" means an underground water-bearing formation which is saturated and which transmits water in sufficient quantities to serve as a water supply. (h) "Artesian" means a condition of internal pressure which causes the water level in a well to rise above the aquifer used to supply water at the well location. (i) "Asset management program" means a program that identifies the desired level of service at the lowest life cycle cost for rehabilitating, repairing, or replacing the assets associated with the waterworks system. (j) "Back-up operator" means a certified operator designated by the public water supply to be in charge of the waterworks system or portion of the waterworks system when the operator in charge is not available. (k) "Bag filters" means pressure-driven separation devices that remove particulate matter larger than 1 micrometer using an engineered porous filtration media. They are typically constructed of a non-rigid, fabric filtration media housed in a pressure vessel in which the direction of flow is from the inside of the bag to outside. (l) "Bank filtration" means a water treatment process that uses a well to recover surface water that has naturally infiltrated into groundwater through a river bed or bank or banks. Infiltration is typically enhanced by the hydraulic gradient imposed by a nearby pumping water supply or other well or wells. (m) "Bottled drinking water" means water that is ultimately sold, provided, or offered for human consumption in a closed container. (n) “Business day” means Monday through Friday, except for federal or state holidays.