[Code of Federal Regulations]

[Title 40, Volume 12]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR63.1446]



[Page 30-32]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 63_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR 

SOURCE CATEGORIES--Table of Contents

 

Subpart QQQ_National Emission Standards for Hazardous Air Pollutants for 

                         Primary Copper Smelting

 

Sec.  63.1446  What alternative emission limitation may I meet for my 

combined gas streams?



    (a) For situations where you combine gas streams from two or more 

affected sources for discharge to the atmosphere through a single vent, 

you may choose to meet the requirements in paragraph (b) of this section 

as an alternative to complying with the individual total particulate 

matter emission limits specified in Sec.  63.1444 that apply to you. 

This alternative emission limit for a combined gas stream may be used 

for any combination of the affected source gas steams specified in 

paragraphs (a)(1) through (5) of this section.

    (1) Gas stream discharged from a copper concentrate dryer vent that 

would otherwise be subject to Sec.  63.1444(a)(1) or (2);

    (2) Gas stream discharged from a smelting furnace capture system 

that



[[Page 31]]



would otherwise be subject to Sec.  63.1444(b)(2)(ii);

    (3) Process off-gas stream discharged from a slag cleaning vessel 

that would otherwise be subject to Sec.  63.1444(c)(2);

    (4) Gas stream discharged from a slag cleaning vessel capture system 

that would otherwise be subject to Sec.  63.1444(c)(3)(ii); and

    (5) Gas stream discharged from a batch copper converter secondary 

capture system that would otherwise be subject to Sec.  63.1444(d)(5).

    (b) You must meet the requirements specified in paragraphs (b)(1) 

and (2) of this section for the combined gas stream discharged through a 

single vent.

    (1) For each combined gas stream discharged through a single vent, 

you must not cause to be discharged to the atmosphere any gases that 

contain total particulate matter in excess of the emission limit 

calculated using the procedure in paragraph (b)(2) of this section and 

measured using the test methods specified in Sec.  63.1450(a).

    (2) You must calculate the alternative total particulate matter 

emission limit for your combined gas stream using Equation 1 of this 

section. The volumetric flow rate value for each of the individual 

affected source gas streams that you use for Equation 1 (i.e., the flow 

rate of the gas stream discharged from the affected source but before 

this gas stream is combined with the other gas streams) is to be the 

average of the volumetric flow rates measured using the test method 

specified in Sec.  63.1450(a)(1)(ii):

[GRAPHIC] [TIFF OMITTED] TR12JN02.025



Where



EAlt = Alternative total particulate matter emission limit 

for the combined gas stream discharged to atmosphere through a single 

vent (mg/dscm);

Ed = Total particulate matter emission limit applicable to 

copper concentrate dryer as specified in Sec.  63.1444(a)(1) or (2) (mg/

dscm);

Qd = Copper concentrate dryer exhaust gas stream volumetric 

flow rate before being combined with other gas streams (dscm);

Esv = Total particulate matter emission limit for smelting 

furnace capture system as specified in Sec.  63.1444(b)(2)(ii) (mg/

dscm);

Qsv = Smelting furnace capture system exhaust gas stream 

volumetric flow rate before being combined with other gas streams 

(dscm);

Escvp = Total particulate matter emission limit for slag 

cleaning vessel process off-gas as specified in Sec.  63.1444(c)(2) (mg/

dscm);

Qscvp = Slag cleaning vessel process off-gas volumetric flow 

rate before being combined with other gas streams (dscm);

Escvf = Total particulate matter emission limit for slag 

cleaning vessel capture system as specified in Sec.  63.1444(c)(3)(ii) 

(mg/dscm);

Qscvf = Slag cleaning vessel capture system exhaust gas 

stream volumetric flow rate before being combined with other gas streams 

(dscm);

Ecc = Total particulate emission limit for the batch copper 

converter secondary capture system as specified in Sec.  63.1544(d)(5) 

(mg/dscm); and

Qcc = Batch copper converter capture system exhaust gas 

stream volumetric flow rate before being combined with other gas streams 

(dscm).



    (c) For each baghouse applied to meet any total particulate matter 

emission limit in paragraph (b) of this section, you must operate the 

baghouse such that the bag leak detection system does not alarm for more 

than 5 percent of the total operating time in any semiannual reporting 

period.

    (d) For each venturi wet scrubber applied to meet any total 

particulate matter emission limit in paragraph (b) of this section, you 

must maintain the hourly average pressure drop and scrubber water flow 

rate at or above the minimum levels established during the initial or 

subsequent performance test.

    (e) For each control device other than a baghouse or venturi wet 

scrubber applied to meet any total particulate matter emission limit in 

paragraph (b) of this section, you must operate the control device as 

specified in paragraphs (e)(1) and (2) of this section.



[[Page 32]]



    (1) You must select one or more operating parameters, as appropriate 

for the control device design, that can be used as representative and 

reliable indicators of the control device operation.

    (2) You must maintain the hourly average value for each of the 

selected parameters at or above the minimum level or at or below the 

maximum level, as appropriate for the selected parameter, established 

during the initial or subsequent performance test.



                 Operation and Maintenance Requirements