(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: 2 D W = _____ 50

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

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: 2 Distance Weight = ________ 50