CFR / Title 40 / Part 421 / Sec. 421.264 Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Furnace wet air pollution control.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of

precious metals,

including silver,

incinerated or smelted

--------------Copper........................................ 5.760 2.745Cyanide (total)............................... 0.900 0.360Zinc.......................................... 4.590 1.890Combined metals............................... 1.350 ...........Ammonia (as N)................................ 599.900 263.700Total suspended solids........................ 67.500 54.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(b) Raw material granulation.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of

precious metals in the

granulated raw material

--------------Copper........................................ 0.819 0.390Cyanide (total)............................... 0.128 0.051Zinc.......................................... 0.653 0.269Combined metals............................... 0.192 ...........Ammonia (as N)................................ 85.310 37.500Total suspended solids........................ 9.600 7.680pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(c) Spent plating solutions.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/liter of spent

plating solution used as

a raw material

--------------Copper........................................ 1.280 0.610Cyanide (total)............................... 0.200 0.080Zinc.......................................... 1.020 0.420Combined metals............................... 0.300 ...........Ammonia (as N)................................ 133.300 58.600Total suspended solids........................ 15.000 12.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(d) Spent cyanide stripping solutions.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of gold

produced by cyanide

stripping

--------------Copper........................................ 4.736 2.257Cyanide (total)............................... 0.740 0.296Zinc.......................................... 3.774 1.554Combined metals............................... 1.11 ...........Ammonia (as N)................................ 493.200 216.800Total suspended solids........................ 55.500 44.400pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(e) Refinery wet air pollution control.\2\---------------------------------------------------------------------------

\2\ This allowance applies to either acid or alkaline wet air pollution control scrubbers. If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of

precious metals,

including silver,

produced in refinery

(f) Gold solvent extraction raffinate and wash water.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of gold

produced by solvent

extraction

--------------Copper........................................ 0.806 0.384Cyanide (total)............................... 0.126 0.050Zinc.......................................... 0.643 0.265Combined metals............................... 0.189 ...........Ammonia (as N)................................ 83.980 36.920Total suspended solids........................ 9.450 7.560pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(g) Gold spent electrolyte.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of gold

produced by electrolysis

--------------Copper........................................ 0.011 0.005Cyanide (total)............................... 0.002 0.001Combined metals............................... 0.003 ...........Zinc.......................................... 0.009 0.004Ammonia (as N)................................ 1.160 0.510Total suspended solids........................ 0.131 0.104pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(h) Gold precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of gold

precipitated

--------------Copper........................................ 5.632 2.684Cyanide (total)............................... 0.880 0.352Zinc.......................................... 4.488 1.848Combined metals............................... 1.320 ...........Ammonia (as N)................................ 586.500 257.800Total suspended solids........................ 66.00 52.800pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(i) Platinum precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of

platinum precipitated

--------------Copper........................................ 6.656 3.172Cyanide (total)............................... 1.040 0.416Zinc.......................................... 5.304 2.184Combined metals............................... 1.560 ...........Ammonia (as N)................................ 693.200 304.700Total suspended solids........................ 78.000 62.400pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(j) Palladium precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of

palladium precipitated

--------------Copper........................................ 7.680 3.660Cyanide (total)............................... 1.200 0.480Zinc.......................................... 6.1200 2.520Combined metals............................... 1.800 ...........Ammonia (as N)................................ 799.800 351.600Total suspended solids........................ 90.000 72.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.00 at all times.

(k) Other platinum group metals precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of other

platinum group metals

precipitated

(l) Spent solution from PGC salt production.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of gold

contained in PGC product

--------------Copper........................................ 1.152 0.549Cyanide (total)............................... 0.180 0.072Zinc.......................................... 0.918 0.378Combined metals............................... 0.270 ...........Ammonia (as N)................................ 120.000 52.740Total suspended solids........................ 13.500 10.800pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(m) Equipment and floor wash.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of

precious metals,

including silver,

produced in refinery

--------------Copper........................................ 0.000 0.000Cyanide (total)............................... 0.000 0.000Zinc.......................................... 0.000 0.000Combined metals............................... 0.000 ...........Ammonia (as N)................................ 0.000 0.000Total suspended solids........................ 0.000 0.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.

(n) Preliminary treatment.

NSPS for the Secondary Precious Metals Subcategory------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/troy ounce of total

precious metals produced

through this operation

-------------------------Copper........................................ 64.000 30.500Cyanide (Total)............................... 10.000 4.000Zinc.......................................... 51.000 21.000Combined metals............................... 15.000 ...........Ammonia (as N)................................ 6665.000 2930.000Total Suspended Solids........................ 750.000 600.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times. [50 FR 38365, Sept. 20, 1985, as amended at 55 FR 31708-31710, Aug. 3, 1990]