Arizona Administrative Code › Title 3 - AGRICULTURE › Chapter 3 - DEPARTMENT OF AGRICULTURE - ENVIRONMENTAL SERVICES DIVISION › Article 9 - COMMERCIAL FEED › Section R3-3-913 - Sampling Methods

Current through Register Vol. 30, No. 28, July 12, 2024
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.