N.J. Admin. Code § 12:185-31.1

Current through Register Vol. 56, No. 21, November 4, 2024

Section 12:185-31.1 - General provisions

(a) This Subchapter for the control of dust shall apply to all operations done in connection with the pit and quarry industry.

(b) All pit and quarry operations shall be so conducted that there shall be no exposure to atmospheric dust concentrations in excess of those concentrations limited by (c) below.

(c) The maximum allowable atmospheric dust concentration, expressed as the total number of particles of dust per cubic foot of air, shall not exceed the values given in the following table:

Maximum allowable dust concentration mineral dusts
Substance	MPPCF n*
Aluminum oxide	50
Asbestos	5
Dust (nuisance, no free silica)	50
Mica (below five percent free silica)	20
Portland cement	50
Talc	20
Silica
High (above 50 percent free S:O[2])	5
Medium (five to 50 percent free S:O[2])	20
Low (below five percent free S:O[2])	50
Silicon carbide	50
Soapstone (below five percent free silica)	20
n* Millions of particles per cubic feet of air

N.J. Admin. Code § 12:185-31.1

Amended by R.2006 d.428, effective 12/4/2006.
See: 38 N.J.R. 3130(a), 38 N.J.R. 5165(b).
Recodified 31.1.1 through 31.1.3 as (a) through (c); in (b), substituted "(c) below" for "the provisions of subsection 31.1.3 of this Section"; and in the table in (c), substituted "percent" for "per cent" five times.