(a)Submission of test samples. (1) The applicant shall not
submit explosives or sheathed explosive units to be tested until requested to
do so by MSHA.
(2) The applicant shall submit 70 pounds of 1 1/4-inch
diameter explosives and additional cartridges in the amount of 3200 divided
by the length in inches, except for cartridges 12, 20 and greater than 36
inches long. The applicant shall submit 70 pounds and additional cartridges
in the amount of 3800 divided by the length in inches for cartridges 12, 20
and greater than 36 inches long.
(3) If approval is requested for cartridges in diameters
less than 1-1/4 inches, the applicant shall submit a number of cartridges
equal to 1800 divided by the length in inches, except for cartridges 12, 20
and greater than 36 inches long. The applicant shall submit cartridges in the
amount of 2200 divided by the length in inches for cartridges 12, 20 and
greater than 36 inches long.
(4) If approval is requested for cartridges in diameters
larger than 1-1/4 inches, the applicant shall submit an additional 10
cartridges of each larger diameter.
(5) If approval is requested for cartridges in more than
one length, the applicant shall submit an additional 10 cartridges for each
additional length and diameter combination.
(6) Each applicant seeking approval of sheathed explosive
units shall submit 140 units.
(b)Condition and composition. Explosives and sheathed explosive
units will not be tested that--
(1) Contain chlorites, chlorates, or substances that will
react over an extended time and cause degradation of the explosive or
sheathed explosive unit;
(2) Are chemically unstable;
(3) Show leakage;
(4) Use aluminum clips to seal the cartridge;
(5) Contain any combination of perchlorate and
aluminum;
(6) Contain more than 5 percent perchlorate; or
(7) Contain any perchlorate and less than 5 percent
water.
(c)Storage. Explosives and sheathed explosive units shall be stored
in a magazine for at least 30 days before gallery tests are conducted.
