Blasting standards; formulas and table

(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. 116 25-8-4 (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 Distance in Feet Weight in Pounds Distance in Feet Weight in Pounds 0-10 11-15 16-20 21-25 26-30 40 50 60 70 80 90 100 110 130 150 170 190 210 230 250 270 290 300 1/8 1/4 1/2 3/4 1.00 2.25 3.50 4.75 6.00 7.25 8.50 9.75 11.0 13.5 16.0 18.5 21.0 23.5 26.0 28.5 31.0 33.5 34.75 350 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2500 3000 3500 4000 4500 49 64 100 144 196 256 324 400 484 576 676 784 900 1024 1156 1296 1444 1600 2500 3600 4900 6400 8100 (d) For nontabulated distances of over 300 feet, the following formula shall be used: 117 25-8-5 History. Ga. L. 1978, p. 1624, § 4. 25-8-5. Use of seismograph measurements.