§ 5.122. Tables of quantity and distance.
(a) Buildings and magazines in which explosives are kept in explosives plants shall be located at distances from buildings which are regularly occupied in whole or in part as a habitation for human beings, or any church, schoolhouse, railroad station, store, or other building where people assemble, or railroads which carry passengers for hire, or from public highways, in conformity with the following table:Quantity and Distance Table
Quantity Which May be kept or Stored Distance Distance Distance From From From Blasting & Electric Other Explosives Nearest Nearest Nearest Blasting Caps (in pounds) Building Railway Highway (in pounds) (in feet) (in feet) (in feet) 1,000—5,000 30 20 10 5,000—10,000 60 40 20 10,000—20,000 120 70 35 20,000—25,000 0—50 145 90 45 25,000—50,000 50—100 240 140 70 50,000—100,000 100—200 360 220 110 100,000—150,000 200—300 520 310 150 150,000—200,000 300—400 640 380 190 200,000—250,000 400—500 720 430 220 250,000—300,000 500—600 800 480 240 300,000—350,000 600—700 860 520 310 350,000—400,000 700—800 920 550 280 400,000—450,000 800—900 980 590 300 450,000—500,000 900—1,000 1,020 610 310 500,000—750,000 1,000—1,500 1,060 640 320 750,000—1,000,000 1,500—2,000 1,200 720 360 1,000,000—1,500,000 2,000—3,000 1,300 780 390 1,500,000—2,000,000 3,000—4,000 1,420 850 420 2,000,000—2,500,000 4,000—5,000 1,500 900 450 2,500,000—3,000,000 5,000—6,000 1,560 940 470 3,000,000—3,500,000 6,000—7,000 1,610 970 490 3,500,000—4,000,000 7,000—8,000 1,660 1,000 500 4,000,000—4,500,000 8,000—9,000 1,700 1,020 510 4,500,000—5,000,000 9,000—10,000 1,740 1,040 520 5,000,000—7,500,000 10,000—15,000 1,780 1,070 530 7,500,000—10,000,000 15,000—20,000 1,950 1,170 580 10,000,000—12,500,000 20,000—25,000 2,110 1,270 630 12,500,000—15,000,000 25,000—30,000 2,260 1,360 680 15,000,000—17,500,000 30,000—35,000 2,410 1,450 720 17,500,000—20,000,000 35,000—40,000 2,550 1,530 760 40,000—45,000 2,680 1,610 800 45,000—50,000 2,800 1,680 840 50,000—55,000 2,920 1,750 880 55,000—60,000 3,030 1,820 910 60,000—65,000 3,130 1,880 940 65,000—70,000 3,220 1,940 970 70,000—75,000 3,310 1,990 1,000 75,000—80,000 3,390 2,040 1,020 80,000—85,000 3,460 2,080 1,040 85,000—90,000 3,520 2,120 1,060 90,000—95,000 3,580 2,150 1,080 95,000—100,000 3,630 2,180 1,090 100,000—125,000 3,670 2,200 1,100 125,000—150,000 3,800 2,280 1,140 150,000—175,000 3,930 2,360 1,180 175,000—200,000 4,060 2,440 1,220 200,000—225,000 4,190 2,520 1,260 225,000—250,000 4,310 2,590 1,300 250,000—275,000 4,430 2,660 1,340 275,000—300,000 4,550 2,730 1,380 (b) Factory buildings in which explosives are kept shall be separated from each other, and from other buildings in explosives plants in which persons are regularly employed, and all magazines shall be located from factory buildings and buildings on explosives plants in which persons are regularly employed, in conformity with the Intraplant Quantity and Distance Table set forth in § 5.62 (relating to location).
(c) Magazines in which more than 50 pounds of explosives are kept shall be detached from other structures. Magazines where more than 5,000 pounds of explosives are kept shall be located at least 200 feet from any other magazine, except cap magazines. Magazines where quantities of explosives over 25,000 pounds are kept shall have an increase over 200 feet of 2 2/3 feet for each 1,000 pounds of explosives in excess of 25,000 pounds stored therein; these distances between magazines may be disregarded where the total quantity stored in the magazines complies with the Quantity and Distance Table set forth in subsection (a). In all cases, the quantity of explosives contained in cap magazines shall govern in regard to spacing such magazines from magazines containing other explosives, but under no circumstances shall a magazine containing blasting caps be within less than 100 feet, unbarricaded, or 50 feet, barricaded, from any magazine other than a cap magazine.
(d) Whenever a factory building or magazine is effectively screened from another explosives plant building or magazine, building, railroad or highway, by natural features of the ground or by efficient artificial barricade of such height that any straight line drawn from the top of any sidewall of the factory building or magazine to any part of the explosives plant building, magazine or building to be protected will pass through such intervening natural or efficient artificial barricade, and any straight line drawn from the top of any sidewall of the factory building or magazine to any point 12 feet above the center of the railroad or highway to be protected will pass through such intervening natural or artificial barricade, 1/2 the distances prescribed by the Quantity and Distance Table in this section, the Intraplant Quantity and Distance Table set forth in § 5.62 (relating to location), and the distances separating magazines, may be deemed applicable.
(e) The tables described in subsections (a) and (b) also apply to new construction or replacement.
Cross References This section cited in 34 Pa. Code § 5.111 (relating to storage of explosive material); 34 Pa. Code § 5.191 (relating to distance limitations); and 34 Pa. Code § 11.43 (relating to employment near explosives).
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