310 CMR, § 8.01

Current through Register 1531, September 27, 2024

Section 8.01 - Introduction

The purpose of 310 CMR 8.00 is to prevent ambient aircontaminant concentrations at any location in the Commonwealth from reaching levels which would constitute significant harm, or imminent and substantial endangerment to the health of persons. The levels which would constitute significant harm, or imminent and substantial endangerment, to the health of persons as have been defined by the Administrator of the Environmental Protection Agency are set forth in Table 1.

TABLE 1.

CONTAMINANT CONCENTRATION LEVELS Prescribed by the EPA Administrator as would cause significant harm, or Imminent and Substantial Endangerment, to Health.

Contaminant	Ambient Air Contaminant Concentration Levels
	Ave. ug/m3	ppm	COHs	Duration (average)	Product
Sulfur Dioxide (SO 2)	2,620	1.0	24-hr.
Particulate Matter PM10 Tape Stain (COHs)	600	8	24-hr. 24-hr.
Product of: (SO 2) X (COHs) (SO 2)	(COHs)	24-hr.	1.5
Carbon Monoxide	144,000	125	1-hr.
Carbon Monoxide	86,300	75	4-hr.
Carbon Monoxide	57,500	50	8-hr.
Photochemical Oxidant	1,200	0.6*	1-hr.
Nitrogen Dioxide	3,750	2.0	1-hr.
Nitrogen Dioxide	938	0.5	24-hr.

^*expressed as Ozone (O ₃)

310 CMR, § 8.01