ATCP 76.11(6)(c)1. 1. Pressure and vacuum type diatomaceous earth filters shall be backwashed as recommended by the manufacturer. Pf

ATCP 76.11(6)(c)2. 2. Septum covers shall be removed, cleaned, or replaced when they no longer provide effective filtration or create a friction loss preventing maintenance of the required recirculation rate. Pf

ATCP 76.11(6)(c)3. 3. Diatomaceous earth wastewater separation tanks, where installed, shall be cleaned according to manufacturer instructions.Pf

ATCP 76.11(6)(c)4. 4. Positive displacement feeder suction intake shall meet all of the following:

ATCP 76.11(6)(c)4.a. a. Suspended at least 6 inches above any sludge layer in the solution tank.P

ATCP 76.11(6)(c)4.b. b. In labeled tanks for mixing and distribution of slurry.

ATCP 76.11(6)(c)4.c. c. Mixing and distribution tanks shall be covered with a screened vent.

ATCP 76.11(6)(c)4.d. d. Installed and maintained to prevent backflow of water into the tanks and to prevent the slurry from being siphoned out of the tanks into the pool recirculation system. P

ATCP 76.11(6)(c)5. 5. Diatomaceous earth slurry feeders shall meet all of the following:

ATCP 76.11(6)(c)5.a. a. The lowest effective concentration of solution shall be used in a diatomaceous earth slurry feeder.

ATCP 76.11(6)(c)5.b. b. The concentration of solution may not exceed 5 percent by weight. Pf

ATCP 76.11(6)(c)5.c. c. The diatomite slurry feeder head and lines shall be flushed as recommended by the manufacturer to assure proper and continuous operation. Pf

ATCP 76.11(6)(c)5.d. d. Water from the discharge side of the recirculation pump may be used.

ATCP 76.11(6)(c)5.e. e. If connection is to a potable water supply line, the supply line shall be equipped with an approved backflow or backsiphonage prevention device. P

ATCP 76.11(6)(c)5.f. f. Diatomite slurry tank agitators shall run continuously. Pf

ATCP 76.11(6)(d) (d) Cartridge filters. Cartridge filters shall meet all of the following:

ATCP 76.11(6)(d)1. 1. Removed and cleaned as recommended by the manufacturer. Pf

ATCP 76.11(6)(d)2. 2. Replaced when plugged or damaged. Pf

ATCP 76.11(6)(d)3. 3. A duplicate set of replacement cartridges shall be available on-site and used when removing a soiled cartridge from the filter for cleaning. Pf

ATCP 76.11(6)(e) (e) Activated filter media, filter ball media, and glass filter media. Activated filter media, filter ball media, and glass filter media shall be maintained and backwashed according to the manufacturer specifications. Pf

ATCP 76.11(6)(f) (f) Other media types. Other media types as approved by the department shall be maintained and backwashed according to the manufacturer specifications. Pf

ATCP 76.11 History History: CR 22-021: cr. Register June 2023 No. 810, eff. 9-24-23.

ATCP 76.12 ATCP 76.12 Labeling, storing, mixing, and handling chemicals, including gaseous chlorine. All labeling, storing, mixing, and handling of chemicals must be in compliance with applicable local, state, and federal regulations. Pf

ATCP 76.12(1) (1) Labeling.

ATCP 76.12(1)(a) (a) Chemical container. Except as provided in par. (b), all chemicals used in the operation and maintenance of pools, and bulk storage tanks containing the chemicals, shall be conspicuously labeled with all the following information: Pf

ATCP 76.12(1)(a)1. 1. Name of the product. Pf

ATCP 76.12(1)(a)2. 2. Manufacturer’s name and address. Pf

ATCP 76.12(1)(a)3. 3. Active ingredients. Pf

ATCP 76.12(1)(a)4. 4. Directions for use. Pf