ATCP 65.76 NoteWisconsin Department of Agriculture, Trade and Consumer Protection
ATCP 65.76 NoteDivision of Food Safety
ATCP 65.76 NoteLaboratory Certification Program
ATCP 65.76 NoteP.O. Box 8911, Madison, WI 53708-8911
ATCP 65.76 NoteTelephone: (608) 224-4712
ATCP 65.76 NoteThe American Public Health Association’s “Standard Methods for the Examination of Dairy Products,” 17th Edition (2004), is on file with the department and the legislative reference bureau and may be obtained from the American Public Health Association, Inc., 800 I Street, NW, Washington, D.C. 20001, telephone 202-777-2742, website www.apha.org.
ATCP 65.76 NoteThe “Official Methods of Analysis of AOAC International,” 18th Edition (2005), is on file with the department and the legislative reference bureau and may be obtained from AOAC International, 2275 Research Blvd., Rockville, MD 20850, telephone 800-379-2622, website https://www.aoac.org .
ATCP 65.76(5)(5)Bacteria counts. Bacteria counts required under s. ATCP 65.70 and bacteria counts that may affect the amount paid to a milk producer shall be obtained by means of a standard plate count, plate loop count, or petrifilm aerobic count method.
ATCP 65.76(6)(6)Drug residues. Drug residue tests required under s. ATCP 65.72 shall be performed according to s. ATCP 65.72.
ATCP 65.76(7)(7)Somatic cells. Somatic cell counts required under s. ATCP 65.70 (4) and somatic cell counts that may affect the amount paid to a milk producer shall be obtained by means of a direct microscopic somatic cell count or an electronic somatic cell count. The Pyronin Y-Methyl green stain test may be used in place of a direct microscopic somatic cell count or electronic somatic cell count for goat milk and shall be used to confirm a direct microscopic somatic cell count or electronic somatic cell count on goat milk that exceeds 1,000,000 per ml.
ATCP 65.76(8)(8)Testing deadlines. A milk quality test shall be conducted within the time period specified by the test method.
ATCP 65.76 HistoryHistory: CR 14-073: cr. Register August 2016 No. 728, eff. 9-1-16; correction in (2) (a) 2. made under s. 35.17, Stats., Register August 2016 No. 728.
ATCP 65.78ATCP 65.78Milk quality test samples.
ATCP 65.78(1)(1)General.
ATCP 65.78(1)(a)(a) Whenever a dairy plant operator performs a milk quality test on a bulk milk shipment from a milk producer, the dairy plant operator shall perform that milk quality test on a test sample collected under s. ATCP 82.12.
ATCP 65.78(1)(b)(b) Whenever a dairy plant operator performs a milk quality test on shipment of milk in cans from a milk producer, the dairy plant operator shall perform that milk quality test on a test sample collected under sub. (3).
ATCP 65.78(1)(c)(c) Notwithstanding pars. (a) and (b), a dairy plant operator may use a composite sample, under sub. (4), to perform a Babcock test for milkfat or to perform another milk quality test approved by the division under sub. (4). A composite sample shall be compiled from fresh milk samples collected under par. (a) or (b).
ATCP 65.78(1)(d)(d) This subsection does not apply to a bulk load test for drug residues under s. ATCP 65.72 (3).
ATCP 65.78(1)(e)(e) Upon reasonable notice from the division, a dairy plant operator shall provide the division with samples of producer milk collected under s. ATCP 65.38. The division may request samples once every 4 months, or more often as the department considers necessary for animal health and milk quality testing. Every sample shall be marked with the identification number of the individual producer from whom the sample was collected, and shall also indicate the date on which the sample was collected. A sample shall be kept at a temperature of 32° to 40° F. (0° F. to 4° C.) until it is transferred to the custody of the department.
ATCP 65.78(2)(2)Test samples refrigerated. At all times prior to testing, a test sample under sub. (1) shall be kept refrigerated at a temperature of 32 to 40° F. (0 to 4° C.). Test samples kept at a dairy plant or testing laboratory shall be kept in a refrigerated storage facility used only for storing test samples and laboratory supplies.
ATCP 65.78(3)(3)Collecting test samples from shipments of milk in cans.
ATCP 65.78(3)(a)(a) If a producer ships milk to a dairy plant in cans, rather than in bulk, the dairy plant operator shall collect a test sample from each milk shipment immediately after that milk shipment is transferred to the weigh tank at the dairy plant, and before it is commingled with any other milk shipment. The weigh tank shall be constructed so that milk poured into the weigh tank is completely mixed.
ATCP 65.78(3)(b)(b) If a weigh tank is not large enough to accommodate a producer’s entire milk shipment, so that multiple weighings are needed, the dairy plant operator shall divide the shipment as evenly as possible between weighings and collect a sample from each weighing. The samples shall be of equal volume and shall be combined to form a single sample representing the entire shipment from the producer. The dairy plant operator may not split the contents of any single can of milk between weighings, but shall include all of the contents of that can in the same weighing.
ATCP 65.78(4)(4)Composite samples.
ATCP 65.78(4)(a)(a) A dairy plant operator may use a composite sample to perform a Babcock test for milkfat, but may not perform any other milk quality test on a composite sample except with the division’s written authorization. A composite sample shall be compiled according to this subsection.
ATCP 65.78(4)(b)(b) A composite sample shall include a representative sample of milk from each of 2 or more milk shipments represented by the composite sample. No composite sample may include milk from more than 16 milk shipments. Each component sample included in the composite sample shall have the same volume and shall include at least 10 ml. of milk. A composite sample shall include at least 150 ml. of milk.
ATCP 65.78(4)(c)(c) A composite sample container shall have a capacity of at least 240 ml. The composite sample container shall include an effective permanent closure that is attached to the container. The composite sample container shall be marked to identify the producer and the milk shipments represented in the composite sample.
ATCP 65.78(4)(d)(d) A composite sample representing a producer’s bulk milk shipments shall be compiled from fresh milk samples collected from those shipments under s. ATCP 82.12. On the same day that a producer’s bulk milk shipment is received by the dairy plant operator, or by 12:00 noon of the following day, the dairy plant operator shall transfer, to the composite sample, at least 10 ml. of milk from the sample collected from that milk shipment under s. ATCP 82.12.
ATCP 65.78(4)(e)(e) A composite sample representing a producer’s shipments of milk in cans shall be compiled from milk samples collected from those shipments according to sub. (3).