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Text from the OSHA Logging Standard Text from the OSHA Logging Standard

1910.266(d)(10)...

(d)(10) "Explosives and blasting agents."

(d)(10)(i) Explosives and blasting agents shall be stored, handled, transported, and used in accordance with the requirements of subpart H of part 1910.

(d)(10)(ii) Only a designated person shall handle or use explosives and blasting agents.

(d)(10)(iii) Explosives and blasting agents shall not be transported in the driver compartment or in any passenger-occupied area of a machine or vehicle.

1910.109(b)(1), (c)(1) and (e)...

(b)(1) "General hazard." No person shall store, handle, or transport explosives or blasting agents when such storage, handling, and transportation of explosives or blasting agents constitutes an undue hazard to life.

(c) "Storage of explosives" -

(c)(1) "General provisions."

(c)(1)(i) All Class A, Class B, Class C explosives, and special industrial explosives, and any newly developed and unclassified explosives, shall be kept in magazines which meet the requirements of this paragraph.

(c)(1)(ii) Blasting caps, electric blasting caps, detonating primers, and primed cartridges shall not be stored in the same magazine with other explosives.

(c)(1)(iii) Ground around magazines shall slope away for drainage. The land surrounding magazines shall be kept clear of brush, dried grass, leaves, and other materials for a distance of at least 25 feet.

(c)(1)(iv) Magazines as required by this paragraph shall be of two classes; namely, Class I magazines, and Class II magazines.

(c)(1)(v) Class I magazines shall be required where the quantity of explosives stored is more than 50 pounds. Class II magazines may be used where the quantity of explosives stored is 50 pounds or less.

(c)(1)(vi) *Class I magazines shall be located away from other magazines in conformity with Table H-21.

TABLE H-21-AMERICAN TABLE OF DISTANCES FOR STORAGE OF EXPLOSIVES

                     (Footnotes 1-5)

    [As revised and approved by the Institute of Makers of

              Explosives, June 5, 1964]

 ___________________________________________________________
                                 |
       Explosives                | Distances in feet when
 ________________________________| storage is barricaded:
              |                  | Separation of magazines
 Pounds over  | Pounds not over  |
 _____________|__________________|_________________________
              |                  |
            2 |                5 |               6
            5 |               10 |               8
           10 |               20 |              10
           20 |               30 |              11
           30 |               40 |              12
           40 |               50 |              14
           50 |               75 |              15
           75 |              100 |              16
          100 |              125 |              18
          125 |              150 |              19
          150 |              200 |              21
          200 |              250 |              23
          250 |              300 |              24
          300 |              400 |              27
          400 |              500 |              29
          500 |              600 |              31
          600 |              700 |              32
          700 |              800 |              33
          800 |              900 |              35
          900 |            1,000 |              36
        1,000 |            1,200 |              39
        1,200 |            1,400 |              41
        1,400 |            1,600 |              43
        1,600 |            1,800 |              44
        1,800 |            2,000 |              45
        2,000 |            2,500 |              49
        2,500 |            3,000 |              52
        3,000 |            4,000 |              58
        4,000 |            5,000 |              61
        5,000 |            6,000 |              65
        6,000 |            7,000 |              68
        7,000 |            8,000 |              72
        8,000 |            9,000 |              75
        9,000 |           10,000 |              78
       10,000 |           12,000 |              82
       12,000 |           14,000 |              87
       14,000 |           16,000 |              90
       16,000 |           18,000 |              94
       18,000 |           20,000 |              98
       20,000 |           25,000 |             105
       25,000 |           30,000 |             112
       30,000 |           35,000 |             119
       35,000 |           40,000 |             124
       40,000 |           45,000 |             129
       45,000 |           50,000 |             135
       50,000 |           55,000 |             140
       55,000 |           60,000 |             145
       60,000 |           65,000 |             150
       65,000 |           70,000 |             155
       70,000 |           75,000 |             160
       75,000 |           80,000 |             165
       80,000 |           85,000 |             170
       85,000 |           90,000 |             175
       90,000 |           95,000 |             180
       95,000 |          100,000 |             185
      100,000 |          110,000 |             195
      110,000 |          120,000 |             205
      120,000 |          130,000 |             215
      130,000 |          140,000 |             225
      140,000 |          150,000 |             235
      150,000 |          160,000 |             245
      160,000 |          170,000 |             255
      170,000 |          180,000 |             265
      180,000 |          190,000 |             275
      190,000 |          200,000 |             285
      200,000 |          210,000 |             295
      210,000 |          230,000 |             315
      230,000 |          250,000 |             335
      250,000 |          275,000 |             360
      275,000 |          300,000 |             385 ______________|__________________|_________________________

  Footnote(1) "Natural barricade" means natural features of the ground, such as hills, or timber of sufficient density that the surrounding exposures which require protection cannot be seen from the magazine when the trees are bare of leaves.

  Footnote(2) "Artificial barricade" means an artificial mound or revetted wall of earth of a minimum thickness of three feet.

  Footnote(3) "Barricaded" means that a building containing explosives is effectually screened from a magazine, building, railway, or highway, either by a natural barricade, or by an artificial barricade of such height that a straight line from the top of any sidewall of the building containing explosives to the eave line of any magazine, or building, or to a point 12 feet above the center of a railway or highway, will pass through such intervening natural or artificial barricade.

  Footnote(4) When two or more storage magazines are located on the same property, each magazine must comply with the minimum distances specified from inhabited buildings, railways, and highways, and in addition, they should be separated from each other by not less than the distances shown for "Separation of Magazines," except that the quantity of explosives contained in cap magazines shall govern in regard to the spacing of said cap magazines from magazines containing other explosives. If any two or more magazines are separated from each other by less than the specified "Separation of Magazines" distances, then such two or more magazines, as a group, must be considered as one magazine, and the total quantity of explosives stored in such group must be treated as if stored in a single magazine located on the site of any magazine of the group, and must comply with the minimum of distances specified from other magazines, inhabited buildings, railways, and highways.

  *Footnote(5) This table applies only to the permanent storage of commercial explosives. It is not applicable to transportation of explosives, or any handling or temporary storage necessary or incident thereto. It is not intended to apply to bombs, projectiles, or other heavily encased explosives.

 (c)(1)(vii) Except as provided in subdivision (viii) of this subparagraph, class II magazines shall be located in conformity with Table H-21, but may be permitted in warehouses and in wholesale and retail establishments when located on a floor which has an entrance at outside grade level and the magazine is located not more than 10 feet from such an entrance. Two class II magazines may be located in the same building when one is used only for blasting caps in quantities not in excess of 5,000 caps and a distance of 10 feet is maintained between magazines.

(c)(1)(viii) When used for temporary storage at a site for blasting operations, class II magazines shall be located away from other magazines. A distance of at least one hundred and fifty (150) feet shall be maintained between class II magazines and the work in progress when the quantity of explosives kept therein is in excess of 25 pounds, and at least 50 feet when the quantity of explosives is 25 pounds, or less.

(c)(1)(ix) This paragraph (c) does not apply to:

(c)(1)(ix)(a) Stocks of small arms ammunition, propellant-actuated power cartridges, small arms ammunition primers in quantities of less than 750,000, or of smokeless propellants in quantities less than 750 pounds;

(c)(1)(ix)(b) Explosive-actuated power devices when in quantities less than 50 pounds net weight of explosives;

(c)(1)(ix)(c) Fuse lighters and fuse igniters;

(c)(1)(ix)(d) Safety fuses other than cordeau detonant fuses.

(e) "Use of explosives and blasting agents" -

(e)(1) "General provisions."

(e)(1)(i) While explosives are being handled or used, smoking shall not be permitted and no one near the explosives shall possess matches, open light or other fire or flame. No person shall be allowed to handle explosives while under the influence of intoxicating liquors, narcotics, or other dangerous drugs.

(e)(1)(ii) Original containers or Class II magazines shall be used for taking detonators and other explosives from storage magazines to the blasting area.

(e)(1)(iii) When blasting is done in congested areas or in close proximity to a structure, or any other installation that may be damaged, the blast shall be covered before firing with a mat constructed so that it is capable of preventing fragments from being thrown.

(e)(1)(iv) Persons authorized to prepare explosive charges or conduct blasting operations shall use every reasonable precaution, including but not limited to warning signals, flags, barricades, or woven wire mats to insure the safety of the general public and workmen.

(e)(1)(v) Blasting operations shall be conducted during daylight hours.

(e)(1)(vi) Whenever blasting is being conducted in the vicinity of gas, electric, water, fire alarm, telephone, telegraph, and steam utilities, the blaster shall notify the appropriate representatives of such utilities at least 24 hours in advance of blasting, specifying the location and intended time of such blasting. Verbal notice shall be confirmed with written notice.

(e)(1)(vii) Due precautions shall be taken to prevent accidental discharge of electric blasting caps from current induced by radar, radio transmitters, lightning, adjacent powerlines, dust storms, or other sources of extraneous electricity. These precautions shall include:

(e)(1)(vii)(a) The suspension of all blasting operations and removal of persons from the blasting area during the approach and progress of an electric storm.

(e)(1)(vii)(b) The posting of signs warning against the use of mobile radio transmitters on all roads within 350 feet of the blasting operations.

(e)(2) "Storage at use sites."

(e)(2)(i) *Empty containers and paper and fiber packing materials which have previously contained explosive materials shall be disposed of in a safe manner, or reused in accordance with the Department of Transportation's Hazardous Materials Regulations (49 CFR parts 177-180).

(e)(2)(ii) Containers of explosives shall not be opened in any magazine or within 50 feet of any magazine. In opening kegs or wooden cases, no sparking metal tools shall be used; wooden wedges and either wood, fiber or rubber mallets shall be used. Nonsparking metallic slitters may be used for opening fiberboard cases.

(e)(2)(iii) Explosives or blasting equipment that are obviously deteriorated or damaged shall not be used.

(e)(2)(iv) No explosives shall be abandoned.

(e)(3) "Loading of explosives in blast holes."

(e)(3)(i) All drill holes shall be sufficiently large to admit freely the insertion of the cartridges of explosives.

(e)(3)(ii) Tamping shall be done only with wood rods without exposed metal parts, but nonsparking metal connectors may be used for jointed poles. Violent tamping shall be avoided. Primed cartridges shall not be tamped.

(e)(3)(iii) When loading blasting agents pneumatically over electric blasting caps, semiconductive delivery hose shall be used and the equipment shall be bonded and grounded.

(e)(3)(iv) No holes shall be loaded except those to be fired in the next round of blasting. After loading, all remaining explosives shall be immediately returned to an authorized magazine.

(e)(3)(v) Drilling shall not be started until all remaining butts of old holes are examined with a wooden stick for unexploded charges, and if any are found, they shall be refired before work proceeds.

(e)(3)(vi) No person shall be allowed to deepen drill holes which have contained explosives.

(e)(3)(vii) After loading for a blast is completed, all excess blasting caps or electric blasting caps and other explosives shall immediately be returned to their separate storage magazines.

(e)(4) "Initiation of explosive charges."

(e)(4)(i) [Reserved]

(e)(4)(ii) When fuse is used, the blasting cap shall be securely attached to the safety fuse with a standard-ring type cap crimper. All primers shall be assembled at least 50 feet from any magazine.

..1910.109(e)(4)(iii)

(e)(4)(iii) Primers shall be made up only as required for each round of blasting.

(e)(4)(iv) No blasting cap shall be inserted in the explosives without first making a hole in the cartridge for the cap with a wooden punch of proper size or standard cap crimper.

(e)(4)(v) Explosives shall not be extracted from a hole that has once been charged or has misfired unless it is impossible to detonate the unexploded charge by insertion of a fresh additional primer.

(e)(4)(vi) If there are any misfires while using cap and fuse, all persons shall be required to remain away from the charge for at least 1 hour. If electric blasting caps are used and a misfire occurs, this waiting period may be reduced to 30 minutes. Misfires shall be handled under the direction of the person in charge of the blasting and all wires shall be carefully traced and search made for unexploded charges.

(e)(4)(vii) Blasters, when testing circuits to charged holes, shall use only blasting galvanometers designed for this purpose.

(e)(4)(viii) Only the employee making leading wire connections in electrical firing shall be allowed to fire the shot. Leading wires shall remain shorted and not be connected to the blasting machine or other source of current until the charge is to be fired.

(e)(5) "Warning required." Before a blast is fired, the employer shall require that a loud warning signal be given by the person in charge, who has made certain that all surplus explosives are in a safe place, all persons and vehicles are at a safe distance or under sufficient cover, and that an adequate warning has been given.


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