Cal. Code Regs. tit. 8, § 5252.1 – Quantity and Distance Table for Storage of Explosives-Low Explosives Distances in Feet When Storage Is Unbarricaded.

(a) These explosives normally will be confined to pressure ruptures of containers and will not produce propagating shock waves or damaging blast over pressure beyond the magazine distance specified for this class. These distances are unbarricaded.
Pounds Over
Pounds Not Over
Inhabited Buildings
Railways and Highways
Above Ground Magazine Separation Intraline Separation
0
1,000
75
75
50
1,000
5,000
115
115
75
5,000
10,000
150
150
100
10,000
20,000
190
190
125
20,000
30,000
215
215
145
30,000
40,000
235
235
155
40,000
50,000
250
250
165
50,000
60,000
260
260
175
60,000
70,000
270
270
185
70,000
80,000
280
280
190
80,000
90,000
295
295
195
90,000
100,000
300
300
200
100,000
200,000
375
375
250
200,000
300,000
450
450
300
(b) Distances are not to be reduced by the presence of barricades or earth cover.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

1. New section filed 7-11-2003; operative 8-10-2003 (Register 2003, No. 28).