CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS (parts 5 to 36) > PART 15—REQUIREMENTS FOR APPROVAL OF EXPLOSIVES AND SHEATHED EXPLOSIVE UNITS > SUBPART B—Requirements for Approval of Explosives (§15.20 to §15.22) > 15.21—Tolerances for ingredients.

15.21—Tolerances for ingredients.

Tolerances for each ingredient in an explosive, which are expressed as a percentage of the total explosive, shall not exceed the following:
(a) Physical sensitizers: The tolerances established by the applicant;
(b) Aluminum: ±0.7 percent;
(c) Carbonaceous materials: ±3 percent; and
(d) Moisture and ingredients other than specified in paragraphs (a), (b), and (c) of this section: The tolerances specified in Table II.
Table II—Tolerances for Moisture and Other Ingredients
Quantity of ingredients (as percent of total explosive or sheath) Tolerance percent
0 to 5.0 1.2
5.1 to 10.0 1.5
10.1 to 20.0 1.7
20.1 to 30.0 2.0
30.1 to 40.0 2.3
40.1 to 50.0 2.5
50.1 to 55.0 2.8
55.1 to 100.0 3.0