“U.S. No. 1” consists of shelled almonds of similar varietal characteristics which are whole, clean and well dried, and which are free from decay, rancidity, insect injury, foreign material, doubles, split or broken kernels, particles and dust, and free from damage caused by chipped and scratched kernels, mold, gum, shriveling, brown spot or other means. (See §§51.2113 and 51.2114.)

In order to allow for variations incident to proper grading and handling, the following tolerances, by weight, shall be permitted:

(a) For dissimilar varieties. 5 percent, including not more than one-fifth of this amount, or 1 percent, for bitter almonds mixed with sweet almonds;

(b) For doubles. 15 percent;

(c) For kernels damaged by chipping and/or scratching. 10 percent;

(d) For foreign material. One-twentieth of 1 percent (0.05 percent). No part of this percentage shall be allowed for glass and metal;

(e) For particles and dust. One-tenth of 1 percent (0.10 percent); and,

(f) For other defects. 5 percent including not more than one-fifth of this amount, or 1 percent, for split or broken kernels, and including not more than three-tenths of the former amount, or 11⁄2 percent, for seriously damaged kernels.