(a) In all blasting operations, except as otherwise provided in this chapter, the maximum peak particle velocity of any component of ground motion recorded on a three-component seismograph (where the components -- transverse, vertical, and longitudinal -- are arranged mutually perpendicular) shall not exceed two inches per second at the location of any dwelling house, public building, school, church, or commercial or institutional building normally occupied.
(b) For blast-to-structure distance greater than 300 feet, the standard table for maximum charge per delay shall be generated by the formula:
where W is the weight of explosive in pounds and D is the distance in feet to the nearest dwelling house, public building, school, church, or commercial or institutional building normally occupied.
(c) The following table may be used for determining the weight of explosives to be used with a single delay period:
STANDARD TABLE OF DISTANCE 11
Distance Weight
in Feet in Pounds
0-10 1/8
11-15 1/4
16-20 1/2
21-25 3/4
26-30 1.00
40 2.25
50 3.50
60 4.75
70 6.00
80 7.25
90 8.50
100 9.75
110 11.0
130 13.5
150 16.0
170 18.5
190 21.0
210 23.5
230 26.0
250 28.5
270 31.0
290 33.5
300 34.75
350 49
400 64
500 100
600 144
700 196
800 256
900 324
1000 400
1100 484
1200 576
1300 676
1400 784
1500 900
1600 1024
1700 1156
1800 1296
1900 1444
2000 1600
2500 2500
3000 3600
3500 4900
4000 6400
4500 8100
(d) For nontabulated distances of over 300 feet, the following formula shall be used:
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