Section R3-3-913. Sampling Methods

A.      Sampling commercial feed. The methods of sampling com- mercial feed shall comply with the procedures established in 4.1.01, Official Method 965.16 Sampling of Animal Feed, in the “Official Methods of Analysis of AOAC International,” 16th Edition, 1997, which is incorporated by reference, on file with the Office of the Secretary of State, and does not include any later amendments or editions of the incorporated matter. Copies may be purchased from AOAC International, 481 North Frederick Avenue, Suite 500, Gaithersburg, Maryland 20877-2417.

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 such as the “Probe-a-Vac” pneumatic 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 equip- ment if scientific data documenting its ability to obtain a representative sample is approved by the Associate Director,

f.         Shop-vac 1.5 hp vacuum system capable of holding 12 gallons, modified to hold a 15 ft. length of vac- uum hose attached to a 13 ft. length of 3/4 inch PVC pipe.

4.        Sampling procedure.

a.         If a corkscrew trier or Probe-a-Vac 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:

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 shop-vac 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 con- sist 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 shop-vac gross sample is not at least 10 pounds,

the sample shall be discarded and the sampling pro- cedure 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.

Historical Note

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 Octo- ber 10, 1978, pursuant to A.R.S. § 41-1003, valid for only 90 days (Supp. 78-5). Amended as an emergency effec- tive 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). Pat- terns 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).