Ariz. Admin. Code § R3-3-913 - Sampling Methods

A. Sampling commercial feed. The methods of sampling commercial feed shall comply with the procedures established in the Official Method, 965.16 Sampling of Animal Feed, in the "Official Methods of Analysis of AOAC International, 22nd Edition (2023)", which is incorporated by reference, on file with the Department, and does not include any later amendments or editions of the incorporated matter. Copies are available for inspection at the Department located at 1110 West Washington Street, Suite 450, Phoenix, AZ 85007, or may be purchased from AOAC International, 2275 Research Boulevard, Suite 300, Rockville, Maryland 20850, or by purchasing a print copy or subscribing online at https://mem-bers.aoac.org/bookstore/.

B. Sampling whole cottonseed.

1. Sample size - A gross sample not less than 30 pounds shall be taken from a lot. The gross sample shall consist of not less than 10 probes evenly spaced or 10 stream sample passes taken following the procedure prescribed in subsection (B)(4)(b).

2. Sample container - The sample container shall consist of a clean cloth, burlap, or paper or plastic mesh bags. The sample shall be delivered to the laboratory within 48 hours (excluding weekends and holidays), stored in a dry, well-aerated location, and the results of the analysis reported by a certified laboratory within five working days from receipt of sample.

3. Sampling equipment. Sampling equipment includes:

a. Scale, graduated in one-half pound increments, and any of the following:

b. Corkscrew trier, approximately 50 inches in length and capable of taking at least a three-pound sample,

c. Pneumatic probe sampler,

d. Stream sampler: A container at least 8 inches x 5 inches x 5 1/2 inches attached to a pole that enables the sampler to pass the container through falling streams of cottonseed,

e. Automatic stream samplers or other sampling equipment if scientific data documenting its ability to obtain a representative sample is approved by the Associate Director,

f. Canister style shop vacuum system of no less than 1.5 hp capable of holding 12 gallons, modified to hold a 15 ft. length of vacuum hose attached to a 13 ft. length of 3/4 inch PVC pipe.

4. Sampling procedure.

a. If a corkscrew trier or pneumatic probe sampler is used, at least 10 evenly spaced probes shall be taken per lot. The probed samples shall be taken according to the following patterns:

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The probes shall penetrate at least 50 inches, and at least two of the 10 probes per sample shall reach the bottom of the lot being sampled. The probe shall be inserted at an angle perpendicular to the face of the lot.

b. If a canister style shop vacuum system is used, at least 15 evenly spaced probes shall be taken per lot. The sampling patterns specified in subsection (B)(4)(a) shall be modified to allow for the additional samples.

c. Stream samples shall be taken while the cottonseed is being discharged, if there is a uniform discharge flow over a set period of time. The sample shall consist of at least 10 evenly timed and spaced passes through the discharge flow, resulting in the sample size specified in subsection (B)(1).

d. The gross sample shall be weighed to the nearest 1/2 pound but shall not be reduced in size. If any gross sample does not meet the minimum 30 pound weight, that gross sample shall be discarded and the sampling procedure repeated from the beginning. If the canister style shop vacuum gross sample is not at least 10 pounds, the sample shall be discarded and the sampling procedure repeated from the beginning.

e. The Associate Director shall approve any modified sampling procedure if scientific data is provided that documents that representative samples will be obtained through the modified sampling procedure.

Notes

Ariz. Admin. Code § R3-3-913

Former Administrative Rule 1. Former Section R3-3-53 repealed effective January 12, 1978 (Supp. 78-1). New Section R3-3-53 adopted as an emergency effective October 10, 1978, pursuant to A.R.S. § 41-1003, valid for only 90 days (Supp. 78-5). Amended as an emergency effective October 11, 1978, pursuant to A. R. S. § 41-1003, valid for only 90 days (Supp. 78-5). New Section R3-3-53 adopted effective February 3, 1981 (Supp. 81-1). Amended effective July 20, 1984 (Supp. 84-4). Section R3-3-913 renumbered from R3-3-53 (Supp. 91-4). Patterns omitted in Supp. 98-4 under subsection (C)(4)(a) have been corrected to reflect filed rules (Supp. 99-1). Amended by final rulemaking at 5 A.A.R. 4419, effective November 3, 1999 (Supp. 99-4). Amended by final rulemaking at 30 A.A.R. 89, effective 3/4/2024.