Section 25-8-4. Blasting standards; formulas and tables

   (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:

Display Image

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:

Display Image

Ga. L. 1978, p. 1624, § 4.