California Code of Regulations › Title 19 - Public Safety › Division 1 - State Fire Marshal › Chapter 10 - Explosives › Subchapter 6 - Tables of Distances › Article 19 - Ammonium Nitrate and Blasting Agents › Section 1582 - Table of Separation Distances of Ammonium Nitrate and Blasting Agents from Explosives or Blasting Agents

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Donor
								  Weight
Minimum Separation Distance
								  of Receptor When Barricaded2
								  (feet)
Minimum Thickness of
								  Artificial
Pounds
								  Over
Pounds Not
								  Over
Ammonium
								  Nitrate3
Blasting Agent 
								  4
Barricades5
								  (inches)
100
3
11
12
100
300
4
14
12
300
600
5
18
12
600
1,000
6
22
12
1,000
1,600
7
25
12
1,600
2,000
8
29
12
2,000
3,000
9
32
15
3,000
4,000
10
36
52
4,000
6,000
11
40
52
6,000
8,000
12
43
20
8,000
10,000
13
47
20
10,000
12,000
14
50
20
12,000
16,000
15
54
25
16,000
20,000
16
58
25
20,000
25,000
18
65
25
25,000
30,000
19
68
30
30,000
35,000
20
72
30
35,000
40,000
21
76
35
40,000
45,000
22
79
35
45,000
50,000
23
83
35
50,000
55,000
24
86
35
55,000
60,000
25
90
35
60,000
70,000
26
94
40
70,000
80,000
28
101
40
80,000
90,000
30
108
40
90,000
100,000
32
115
40
100,000
120,000
34
122
50
120,000
140,000
37
133
50
140,000
160,000
40
144
50
160,000
180,000
44
158
50
180,000
200,000
48
173
50
200,000
220,000
52
187
60
220,000
250,000
55
202
60
250,000
275,000
60
216
60
275,000
300,000
64
230
60
Notes to Table of Separation Distances of Ammonium
						Nitrate and Blasting Agents from Explosives or Blasting Agents
NOTE:
1
--Separation distances to prevent
						explosion of ammonium nitrate and ammonium nitrate-based blasting agents by
						propagation from nearby stores of high explosives or blasting agents referred
						to in the Table as the "donor." Ammonium nitrate, by itself, is not considered
						to be a donor when applying this Table. If stores of ammonium nitrate are
						located within the sympathetic detonation distance of explosives or blasting
						agents, one-half the mass of the ammonium nitrate should be included in the
						mass of the donor. These distances allow for the possibility of high velocity
						metal fragments from mixers, hoppers, truck bodies, sheet metal structures,
						metal containers, and the like, which may enclose the "donor." These distances
						apply to the separation of stores only. The Table of Distances shall be used in
						determining separation distances from inhabited buildings, passenger railways
						and public highways.
NOTE:
2
--When the ammonium nitrate and/or
						blasting agent is not barricaded, the distances shown in the Table shall be
						multiplied by six. Where storage is in bullet-resistant magazines recommended
						for explosives, or where the storage is protected by a bullet-resistant wall,
						distances and barricade thicknesses in excess of those prescribed in the Table
						of Distances are not required.
NOTE:
3
--The distances in the Table apply to
						ammonium nitrate that passes the insensitivity test prescribed in the
						definition of ammonium nitrate fertilizer promulgated by the National Plant
						Food Institute; and ammonium nitrate failing to pass said test shall be stored
						at separation distances determined by competent persons and approved by the
						chief having jurisdiction.
NOTE:
4
--These distances apply to
						nitro-carbo-nitrates and blasting agents which pass the insensitivity test
						prescribed in the DOT regulations.
NOTE:
5
--Earth, or sand dikes or enclosures
						filled with the prescribed minimum thickness of earth or sand are acceptable
						artificial barricades. Natural barricades, such as hills or timber of
						sufficient density that the surrounding exposures which require protection
						cannot be seen from the "donor" when the trees are bare of leaves, are also
						acceptable.
NOTE:
6
--When the ammonium nitrate must be
						counted in determining the distances to be maintained from the inhabited
						buildings, passenger railways and public highways, it may be counted at
						one-half its actual weight because its blast effect is lower.
NOTE:
7
--If any receptor and donor are
						separated from each other by less than the specified "Minimum Separation
						Distance of Receptor," then such receptor and donor, as a group, must be
						considered as one magazine, and the total quantity of explosives and blasting
						agents 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 distances specified from other magazines, inhabited buildings, railways
						and highways.
1. New
						Article 19 (Section
						1582) filed 3-4-69; effective
						thirtieth day thereafter (Register 69, No. 10).
Note: Authority cited: Section
						  12081,
						  Health and Safety Code.