N.J. Admin. Code § 12:190-7.25

Current through Register Vol. 57, No. 1, January 6, 2025

Section 12:190-7.25 - Air blast effects

(a) This section shall apply to air blast effects on a construction that is neither owned nor leased by the person conducting or contracting for the blasting operation closest to the nearest explosives to be detonated.

(b) All blasting shall be monitored by the blaster to determine air blast effects using an approved instrument operated by a competent person.

(c) The maximum allowable air blast at any building resulting from blasting operations shall not exceed 130 decibels peak when accurately measured by an instrument having a flat frequency response (+/-3 decibels) over the range of at least 6 to 200 Hertz.

(d) The maximum allowable air blast at any building resulting from blasting operations relative to demolition of structure work only shall not exceed 140 decibels peak when measured by an instrument having a flat response (+/-3 decibels) over the range of at least 6 to 200 Hertz.

(e) When blasting is of a continuing nature, 124 to 130 decibels shall be the caution range. When air blast effects are consistently within the caution range on six separate blasts, the blast shall be examined and changed so as to reduce air blast effects on subsequent blasts.

(f) For determining compliance with this section, an approved instrument that is operated by a competent person shall be used. An instrument is considered to be approved only when the instrument has been calibrated in accordance with the manufacturer's recommendations.

N.J. Admin. Code § 12:190-7.25

Administrative correction.
See: 29 New Jersey Register 566(a).
Amended by R.1998 d.110, effective 3/2/1998.
See: 29 New Jersey Register 4624(a), 30 New Jersey Register 847(a).
In (a), added "closest to the nearest explosives to be detonated" to the end of the sentence; added a new (b); recodified existing (b) as (c) and deleted "inhabited" preceding "building" and inserted "accurately" preceding "measured"; recodified existing (c) as (d) and added language regarding demolition of structure work; recodified existing (d) as (e) and inserted "on six separate blasts" after "caution range"; and recodified existing (e) as (f) and substituted "An instrument is to be considered approved only when" for "An approved instrument shall include the concept that".