1. A. Calculations. All calculations of particulate matter emissions shall be made in terms of grains per standard cubic foot (milligrams per standard cubic meter) of dry exhaust gas (gr/SCFD) (mg/dscm).

2. B. Particulate Matter from Confined Sources.

   1. (1) Areas I, II, V and VI.

      1. (a) Installations Constructed On or After January 17, 1972. A person may not cause or permit particulate matter to be discharged from any installation constructed on or after January 17, 1972 in excess of 0.05 gr/SCFD (115 mg/dscm).

      2. (b) Installations Constructed Before January 17, 1972.

         1. (i) A person may not cause or permit particulate matter to be discharged from any installation constructed before January 17, 1972 in excess of the values determined from Table 1. When the process weight per hour falls between two values in the table, the maximum weight discharged per hour shall be determined by linear interpolation. When the process weight exceeds 60,000 pounds (27,200 kilograms) per hour, the maximum allowable weight discharged per hour will be determined by use of the following equation:

            E = 55.0 P0.11—40	E = 11.79 P0.11—18.14
            E = Maximum weight discharged per hour (lbs)	E = Maximum weight discharged per hour (kg)
            P = process weight in tons per hour	P = process weight in kilograms per hour

         2. (ii) For those processes in which the process weight per hour exceeds 60,000 pounds (27,200 kilograms), the maximum allowable weight of particulate matter discharged per hour may exceed that calculated by the above equation provided that the concentration of particulate matter in the gases discharged to the atmosphere is less than 0.05 gr/SCFD (115 mg/dscm).
      3. (c) Exception. For any premises for which the Department determines that compliance with §B(1)(a) will cause or exacerbate a violation of the National Ambient Air Quality Standards or Federal Prevention of Significant Deterioration increments, the applicable emission standard is 0.03 gr/SCFD (68.7 mg/dscm).

   2. (2) Areas III and IV.

      1. (a) A person may not cause or permit to be discharged into the outdoor atmosphere from any other installation, particulate matter in excess of 0.03 gr/SCFD (68.7 mg/dscm).

      2. (b) Exceptions. Section B(2)(a) does not apply to the following:

         1. (i) Iron and steel production installations;
         2. (ii) Glass melting furnaces in compliance with COMAR 26.11.25.

3. C. Particulate Matter from Unconfined Sources.

   1. (1) A person may not cause or permit emissions from an unconfined source without taking reasonable precautions to prevent particulate matter from becoming airborne. These reasonable precautions shall include, when appropriate as determined by the Department, the installation and use of hoods, fans, and dust collectors to enclose, capture, and vent emissions. In making this determination, the Department shall consider technological feasibility, practicality, economic impact, and the environmental consequences of the decision.

   2. (2) Exceptions. The following are exempt from the provisions of §C(1):

      1. (a) Iron and steel production installations which are subject to COMAR 26.11.10.04B and C;
      2. (b) Grain drying and grain handling installations;
      3. (c) Batch-type hot-dip galvanizing installations which are subject to COMAR 26.11.12.

4. D. Particulate Matter from Materials Handling and Construction. A person may not cause or permit any material to be handled, transported, or stored, or a building, its appurtenances, or a road to be used, constructed, altered, repaired, or demolished without taking reasonable precautions to prevent particulate matter from becoming airborne. These reasonable precautions shall include, but not be limited to, the following when appropriate as determined by the control officer:

   1. (1) Use of water or chemicals for control of dust in the demolition of existing buildings or structures, construction operations, the grading of roads, or the clearing of land.
   2. (2) Application of asphalt, oil, water, or suitable chemicals on dirt roads, materials stockpiles, and other surfaces which can create airborne dusts.
   3. (3) Installation and use of hoods, fans, and dust collectors to enclose and vent the handling of dusty materials. Adequate containment methods shall be employed during sandblasting of buildings or other similar operations.
   4. (4) Covering, at all times when in motion, open-bodied vehicles transporting materials likely to create air pollution. Alternate means may be employed to achieve the same results as would covering the vehicles.
   5. (5) The paving of roadways and their maintenance in clean condition.
   6. (6) The prompt removal from paved streets of earth or other material which has been transported there by trucks or earth moving equipment or erosion by water.

Authority: Environment Article, §§1-101, 1-404, 2-101—2-103, 2-301—2-303, 10-102, and 10-103, Annotated Code of Maryland

Effective date: July 18, 1980 (7:12 Md. R. 1148)

Regulation .01 amended effective August 16, 1983 (10:14 Md. R. 1262)

Regulation .01B, D amended effective June 8, 1981 (8:9 Md. R. 800)

Regulation .02 amended effective December 3, 1984 (11:22 Md. R. 1899)

Regulation .02C amended effective January 5, 1988 (14:24 Md. R. 2555)

Regulations .02D amended effective October 10, 1981 (8:18 Md. R. 1480); February 10, 1984 (10:26 Md. R. 2341)

Regulation .03B amended effective October 10, 1981 (8:18 Md. R. 1480); July 2, 1985 (12:11 Md. R. 1049)

Regulation .03C amended effective October 10, 1981 (8:18 Md. R. 1480

Regulation .03D amended effective January 5, 1988 (14:24 Md. R. 2555)

Regulation .04 repealed and new Regulation .04 adopted effective January 5, 1988 (14:24 Md. R. 2555)

Regulation .06A repealed effective June 8, 1981 (8:9 Md. R. 800)

Regulation .06 repealed and new Regulation .06 adopted effective August 16, 1983 (10:14 Md. R. 1262)

Regulation .06A amended effective August 19, 1984 (11:14 Md. R. 1250)

Regulation .06B amended effective August 10, 1987 (14:14 Md. R. 1572)

Regulation .06E adopted effective August 10, 1987 (14:14 Md. R. 1572)

Regulation .07 repealed and new Regulation .07 adopted effective February 10, 1984 (10:26 Md. R. 2341)

Regulation .07C amended effective July 2, 1985 (12:11 Md. R. 1049)

Regulation .11D amended effective August 16, 1983 (10:14 Md. R. 1262)

Regulation .12 amended effective June 8, 1981 (8:9 Md. R. 800); August 16, 1983 (10:14 Md. R. 1263); December 3, 1984 (11:22 Md. R. 1899); October 14, 1985 (12:18 Md. R. 1766); August 11, 1986 (13:13 Md. R. 1492); January 5, 1988 (14:24 Md. R. 2555)

Regulation .13 amended effective June 8, 1981 (8:9 Md. R. 800); repealed effective February 25, 1983 (10:1 Md. R. 30)

Regulation .14 adopted effective July 10, 1981 (8:11 Md. R. 974)

Regulation .14 amended effective January 5, 1988 (14:24 Md. R. 2555)

Tables codified as Regulation .16

For the history of this subtitle before June 18, 1980, see the Administrative History of COMAR 26.11.01.

Chapter recodified from COMAR 10.18.06 to COMAR 26.11.06

Regulation .01 adopted effective May 8, 1991 (18:6 Md. R. 688)

Regulation .02A amended effective August 11, 1997 (24:16 Md. R. 1160); November 11, 2002 (29:22 Md. R. 1724); November 24, 2003 (30:23 Md. R. 1653)

Regulation .02B amended effective July 3, 1995 (22:13 Md. R. 969)

Regulation .02C amended effective November 11, 2002 (29:22 Md. R. 1724)

Regulation .03C amended effective November 11, 2002 (29:22 Md. R. 1724)

Regulation .05A amended effective November 11, 2002 (29:22 Md. R. 1724)

Regulation .05B, C amended effective September 22, 1997 (24:19 Md. R. 1343)

Regulation .06A amended effective May 8, 1991 (18:6 Md. R. 688); April 26, 1993 (20:8 Md. R. 726); June 30, 1997 (24:13 Md. R. 932)

Regulation .06B amended effective May 8, 1991 (18:6 Md. R. 688); April 26, 1993 (20:8 Md. R. 726)

Regulation .06E amended effective May 8, 1991 (18:6 Md. R. 688); April 26, 1993 (20:8 Md. R. 724); May 8, 1995 (22:9 Md. R. 648)

Regulation .07B amended effective February 17, 1992 (19:3 Md. R. 306); February 15, 1993 (20:3 Md. R. 260)

Regulation .07C amended effective August 19, 1991 (18:16 Md. R. 1813); February 17, 1992 (19:3 Md. R. 306)

Regulation .11 amended effective March 21, 1989 (16:3 Md. R. 347); May 8, 1991 (18:6 Md. R. 688)

Regulation .11 repealed effective April 26, 1993 (20:8 Md. R. 724)

Regulation .12 amended effective September 26, 1988 (15:17 Md. R. 2049); March 31, 1991 (18:4 Md. R. 450); February 17, 1992 (19:3 Md. R. 306); June 20, 1994 (21:12 Md. R. 1064); June 30, 1997 (24:13 Md. R. 932); October 16, 2000 (27:20 Md. R. 1842); December 10, 2001 (28:24 Md. R. 2130); November 24, 2003 (30:23 Md. R. 1653); September 12, 2005 (32:18 Md. R. 1521); October 8, 2007 (34:20 Md. R. 1741); March 5, 2012 (39:4 Md. R. 339)

Regulation .14 amended effective March 21, 1989 (16:3 Md. R. 347); March 31, 1991 (18:4 Md. R. 450); February 17, 1992 (19:3 Md. R. 306); June 20, 1994 (21:12 Md. R. 1064); May 8, 1995 (22:9 Md. R. 647); June 30, 1997 (24:13 Md. R. 932); October 16, 2000 (27:20 Md. R. 1842); December 10, 2001 (28:24 Md. R. 2130); November 24, 2003 (30:23 Md. R. 1653); June 16, 2008 (35:12 Md. R. 1121); July 16, 2009 (36:14 Md. R. 985)

Regulation .14B amended as an emergency provision effective January 2, 2011 (38:4 Md. R. 263); amended permanently effective May 16, 2011 (38:10 Md. R. 617)

Regulation .14B amended effective March 5, 2012 (39:4 Md. R. 339); July 8, 2013 (40:13 Md. R. 1076)