Cal. Code Regs. tit. 19 § 1581
Explosives | Distances In Feet When Storage Is Barricaded | ||||
| Pounds Over | Pounds Not Over | Inhabited Buildings | Passenger Railways | Public Highways | Separation of Magazines |
| 2 | 5 | 70 | 30 | 30 | 6 |
| 5 | 10 | 90 | 35 | 35 | 8 |
| 10 | 20 | 110 | 45 | 45 | 10 |
| 20 | 30 | 125 | 50 | 50 | 11 |
| 30 | 40 | 140 | 55 | 55 | 12 |
| 40 | 50 | 150 | 60 | 60 | 14 |
| 50 | 75 | 170 | 70 | 70 | 15 |
| 75 | 100 | 190 | 75 | 75 | 16 |
| 100 | 125 | 200 | 80 | 80 | 18 |
| 125 | 150 | 215 | 85 | 85 | 19 |
| 150 | 200 | 235 | 95 | 95 | 21 |
| 200 | 250 | 255 | 105 | 105 | 23 |
| 250 | 300 | 270 | 110 | 110 | 24 |
| 300 | 400 | 295 | 120 | 120 | 27 |
| 400 | 500 | 320 | 130 | 130 | 29 |
| 500 | 600 | 340 | 135 | 135 | 31 |
| 600 | 700 | 355 | 145 | 145 | 32 |
| 700 | 800 | 375 | 150 | 150 | 33 |
| 800 | 900 | 390 | 155 | 155 | 35 |
| 900 | 1,000 | 400 | 160 | 160 | 36 |
| 1,000 | 1,200 | 425 | 170 | 165 | 39 |
| 1,200 | 1,400 | 450 | 180 | 170 | 41 |
| 1,400 | 1,600 | 470 | 190 | 175 | 43 |
| 1,600 | 1,800 | 490 | 195 | 180 | 44 |
| 1,800 | 2,000 | 505 | 205 | 185 | 45 |
| 2,000 | 2,500 | 545 | 220 | 190 | 49 |
| 2,500 | 3,000 | 580 | 235 | 195 | 52 |
| 3,000 | 4,000 | 635 | 255 | 210 | 58 |
| 4,000 | 5,000 | 685 | 275 | 225 | 61 |
| 5,000 | 6,000 | 730 | 295 | 235 | 65 |
| 6,000 | 7,000 | 770 | 310 | 245 | 68 |
| 7,000 | 8,000 | 800 | 320 | 250 | 72 |
| 8,000 | 9,000 | 835 | 335 | 255 | 75 |
| 9,000 | 10,000 | 865 | 345 | 260 | 78 |
| 10,000 | 12,000 | 875 | 370 | 270 | 82 |
| 12,000 | 14,000 | 885 | 390 | 275 | 87 |
| 14,000 | 16,000 | 900 | 405 | 280 | 90 |
| 16,000 | 18,000 | 940 | 420 | 285 | 94 |
| 18,000 | 20,000 | 975 | 435 | 290 | 98 |
| 20,000 | 25,000 | 1,055 | 470 | 315 | 105 |
| 25,000 | 30,000 | 1,130 | 500 | 340 | 112 |
| 30,000 | 35,000 | 1,205 | 525 | 360 | 119 |
| 35,000 | 40,000 | 1,275 | 550 | 380 | 124 |
| 40,000 | 45,000 | 1,340 | 570 | 400 | 129 |
| 45,000 | 50,000 | 1,400 | 590 | 420 | 135 |
| 50,000 | 55,000 | 1,460 | 610 | 440 | 140 |
| 55,000 | 60,000 | 1,515 | 630 | 455 | 145 |
| 60,000 | 65,000 | 1,565 | 645 | 470 | 150 |
| 65,000 | 70,000 | 1,610 | 660 | 485 | 155 |
| 70,000 | 75,000 | 1,655 | 675 | 500 | 160 |
| 75,000 | 80,000 | 1,695 | 690 | 510 | 165 |
| 80,000 | 85,000 | 1,730 | 705 | 520 | 170 |
| 85,000 | 90,000 | 1,760 | 720 | 530 | 175 |
| 90,000 | 95,000 | 1,790 | 730 | 540 | 180 |
| 95,000 | 100,000 | 1,815 | 745 | 545 | 185 |
| 100,000 | 110,000 | 1,835 | 770 | 550 | 195 |
| 110,000 | 120,000 | 1,855 | 790 | 555 | 205 |
| 120,000 | 130,000 | 1,875 | 810 | 560 | 215 |
| 130,000 | 140,000 | 1,890 | 835 | 565 | 225 |
| 140,000 | 150,000 | 1,900 | 850 | 570 | 235 |
| 150,000 | 160,000 | 1,935 | 870 | 580 | 245 |
| 160,000 | 170,000 | 1,965 | 890 | 590 | 255 |
| 170,000 | 180,000 | 1,990 | 905 | 600 | 265 |
| 180,000 | 190,000 | 2,010 | 920 | 605 | 275 |
| 190,000 | 200,000 | 2,030 | 935 | 610 | 285 |
| 200,000 | 210,000 | 2,055 | 955 | 620 | 295 |
| 210,000 | 230,000 | 2,100 | 980 | 635 | 315 |
| 230,000 | 250,000 | 2,155 | 1,010 | 650 | 335 |
| 250,000 | 275,000 | 2,215 | 1,040 | 670 | 360 |
| 275,000 | 300,000 | 2,275 | 1,075 | 690 | 385 |
Notes to Table of Distances for Storage of Explosives
NOTE:1--"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 twelve feet above the center of a railway or highway, will pass through such intervening natural or artificial barricade.
NOTE:2--"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.
NOTE:3--"Artificial Barricade" means an artificial mound or rivetted wall of earth of a minimum thickness of three feet.
NOTE:4--When a building containing explosives is not barricaded, the distances shown in the Table shall be doubled.
NOTE:5--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.
NOTE:6--The permanent storage of more than 300,000 pounds of commercial explosives in one magazine or in a group of magazines which is considered as one magazine is not permitted except by specific approval of the enforcing official.
NOTE:7--This table applies only to the manufacture and 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 and small quantities in commercial establishments.
NOTE:8--All types of blasting caps in strengths through No. 8 cap shall be rated at 1 1/2 pounds of explosives per 1,000 caps. For strengths higher than No. 8 cap, consult the chief having jurisdiction.
NOTE:9--For quantity and distance purposes, detonating fuse up to 60 grains per foot, shall be calculated as equivalent to nine (9) pounds of high explosives per 1000 feet. Heavier cord loads shall be rated proportionally.
Cal. Code Regs. Tit. 19, § 1581
Note: Authority cited: Section 12081, Health and Safety Code, Reference: Sections 12000-12401 inclusive, Health and Safety Code.