NR 812.46(1)(a)4. 4. Entering a well to: diagnose any feature or problem with the well, including pressure testing a nonpressurized conduit, a pitless adapter, or well casing pipe; measure casing depth or total well depth; clean or bail a well without the use of chemicals; or raise the well casing height.

NR 812.46(1)(a)5. 5. After corrective action following a total coliform bacteria-positive test result as required under s. NR 812.10 (12) or 812.27 (8).

NR 812.46(1)(b) (b) Total coliform bacteria and nitrate. A well driller or well constructor shall collect water samples to be analyzed for total coliform bacteria and nitrate after performing any of the following activities:

NR 812.46(1)(b)1. 1. New well construction.

NR 812.46(1)(b)2. 2. Well reconstruction, including deepening, lining or screen replacement.

NR 812.46(1)(b)3. 3. Well redevelopment.

NR 812.46(1)(b)4. 4. Physical conditioning of a well in accordance with s. NR 812.22.

NR 812.46(1)(c) (c) Total coliform bacteria, nitrate and arsenic. A well driller, well constructor, or pump installer shall collect water samples to be analyzed for total coliform bacteria, nitrate, and arsenic after performing any of the following activities as allowed by his or her license:

NR 812.46(1)(c)1. 1. Entering an existing well to perform pump installing activities, or to install, replace or repair any equipment related to pump installing, including installing water level measuring devices, except where par. (a) 3. applies.

NR 812.46(1)(c)2. 2. Chemical conditioning of a well in accordance with s. NR 812.22.

NR 812.46(1)(d) (d) Special well casing depth areas. A well driller or well constructor shall collect water samples and submit them for analyses as specified by the department when constructing or reconstructing a well located within a special well casing depth area.

NR 812.46(1)(e) (e) Water samples not required.

NR 812.46(1)(e)1. 1. Water samples are not required when a well is entered for the sole purpose of taking a water level measurement if the equipment used for measuring the water level has been disinfected between measurements and the equipment and the well cap or seal have been handled in a sanitary manner.

NR 812.46(1)(e)2. 2. Water samples are not required when opening a well cap for the sole purpose of visually inspecting a well or disinfecting a well.

NR 812.46(1)(f) (f) When to collect water samples. A well driller, well constructor, or pump installer shall do all of the following:

NR 812.46(1)(f)1. 1. Collect water samples after any activities specified in pars. (a) to (d) are performed and before the water system is placed into service.

NR 812.46(1)(f)2. 2. Collect water samples no later than 30 days following completion of the well drilling, well construction or pump installing. Well drilling or well construction is considered complete when all operations that require the use of drilling, driving or annular space sealing equipment have been completed. Pump installing is considered complete when the pressure system is capable of providing water to the plumbing system.

NR 812.46(2) (2) Sample collection, handling and submittal. A well driller, well contractor, or pump installer shall meet all of the following requirements:

NR 812.46(2)(a) (a) Where to collect water samples. Samples collected after any activity specified in sub. (1) shall be collected at the sample faucet located upstream of the pressure tank or installed on the tee of the pressure tank. If there is no sample faucet or the sample faucet is not accessible, samples shall be collected off the drilling rig, or from a faucet located upstream of any water treatment equipment. Faucets used for sampling shall be cold water taps free of aerators, strainers, hose attachments, mixing type faucets and treatment devices. The location of sample collection shall be noted on the sample form.

NR 812.46(2)(b) (b) Sample collection and handling.

NR 812.46(2)(b)1. 1. Deliver samples or make arrangements to have samples delivered to a laboratory no later than 48 hours after the sample was collected.

NR 812.46(2)(b)2. 2. Collect samples for total coliform bacteria analysis in a sample bottle that does not contain thiosulfate.

NR 812.46(2)(b)3. 3. Collect and submit a replacement sample no later than 30 days following notification from the laboratory that a sample was rejected for improper collection, improper handling, or presence of chlorine.

NR 812.46 Note Note: A laboratory may have additional requirements for sample collection and handling.

NR 812.46(2)(c) (c) Where to submit samples.

NR 812.46(2)(c)1. 1. Water samples for total coliform bacteria shall be analyzed by a laboratory that has received certification under ch. ATCP 77.

NR 812.46(2)(c)2. 2. Water samples for nitrate shall be analyzed by a laboratory certified by the department under ch. NR 149 to perform nitrate analysis of drinking water, using an approved method listed in s. NR 809.113 Table A.

NR 812.46(2)(c)3. 3. Water samples for arsenic shall be analyzed by a laboratory certified by the department under ch. NR 149 to perform arsenic analysis of drinking water, using an approved method listed in s. NR 809.113, Table A.

NR 812.46(2)(c)4. 4. Water samples for a contaminant specified to be sampled as part of a specific requirement for a special well casing depth area, or otherwise required by the department, shall be analyzed by a laboratory certified for drinking water analyses under ch. NR 149 to analyze drinking water for the presence of that contaminant, to determine if the contaminant is at a level below the primary drinking water standard specified in s. NR 812.06, using an approved method appropriate for the contaminant and listed in s. NR 809.311 Table F, 809.113 Table A, 809.203 Table CM or 809.243 Table E.