Title 40

PART 421

Part 421 - Nonferrous Metals Manufacturing Point Source Category

PART 421 - NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY Authority:Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4. Source:49 FR 8790, Mar. 8, 1984, unless otherwise noted.

40:31.0.1.1.21.0.4SUBJGRP 4
   General Provisions
40:31.0.1.1.21.0.4.1SECTION 421.1
   421.1 Applicability.
40:31.0.1.1.21.0.4.2SECTION 421.2
   421.2 [Reserved]
40:31.0.1.1.21.0.4.3SECTION 421.3
   421.3 Monitoring and reporting requirements.
40:31.0.1.1.21.0.4.4SECTION 421.4
   421.4 Compliance date for pretreatment standards for existing sources (PSES).
40:31.0.1.1.21.0.4.5SECTION 421.5
   421.5 Removal allowances for pretreatment standards.
40:31.0.1.1.21.1SUBPART A
Subpart A - Bauxite Refining Subcategory
40:31.0.1.1.21.1.5.1SECTION 421.10
   421.10 Applicability; description of the bauxite refining subcategory.
40:31.0.1.1.21.1.5.2SECTION 421.11
   421.11 Specialized definitions.
40:31.0.1.1.21.1.5.3SECTION 421.12
   421.12 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.1.5.4SECTION 421.13
   421.13 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.1.5.5SECTION 421.14
   421.14 [Reserved]
40:31.0.1.1.21.1.5.6SECTION 421.15
   421.15 Standards of performance for new sources.
40:31.0.1.1.21.1.5.7SECTION 421.16
   421.16 Pretreatment standards for new sources.
40:31.0.1.1.21.2SUBPART B
Subpart B - Primary Aluminum Smelting Subcategory
40:31.0.1.1.21.2.5.1SECTION 421.20
   421.20 Applicability: description of the primary aluminum smelting subcategory.
40:31.0.1.1.21.2.5.2SECTION 421.21
   421.21 Specialized definitions.
40:31.0.1.1.21.2.5.3SECTION 421.22
   421.22 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.2.5.4SECTION 421.23
   421.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.2.5.5SECTION 421.24
   421.24 Standards of performance for new sources.
40:31.0.1.1.21.2.5.6SECTION 421.25
   421.25 [Reserved]
40:31.0.1.1.21.2.5.7SECTION 421.26
   421.26 Pretreatment standards for new sources.
40:31.0.1.1.21.2.5.8SECTION 421.27
   421.27 [Reserved]
40:31.0.1.1.21.3SUBPART C
Subpart C - Secondary Aluminum Smelting Subcategory
40:31.0.1.1.21.3.5.1SECTION 421.30
   421.30 Applicability: Description of the secondary aluminum smelting subcategory.
40:31.0.1.1.21.3.5.2SECTION 421.31
   421.31 Specialized definitions.
40:31.0.1.1.21.3.5.3SECTION 421.32
   421.32 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.3.5.4SECTION 421.33
   421.33 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.3.5.5SECTION 421.34
   421.34 Standards of performance for new sources.
40:31.0.1.1.21.3.5.6SECTION 421.35
   421.35 Pretreatment standards for existing sources.
40:31.0.1.1.21.3.5.7SECTION 421.36
   421.36 Pretreatment standards for new sources.
40:31.0.1.1.21.3.5.8SECTION 421.37
   421.37 [Reserved]
40:31.0.1.1.21.4SUBPART D
Subpart D - Primary Copper Smelting Subcategory
40:31.0.1.1.21.4.5.1SECTION 421.40
   421.40 Applicability: Description of the primary copper smelting subcategory.
40:31.0.1.1.21.4.5.2SECTION 421.41
   421.41 Specialized definitions.
40:31.0.1.1.21.4.5.3SECTION 421.42
   421.42 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.4.5.4SECTION 421.43
   421.43 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.4.5.5SECTION 421.44
   421.44 Standards of performance for new sources.
40:31.0.1.1.21.4.5.6SECTION 421.45
   421.45 [Reserved]
40:31.0.1.1.21.4.5.7SECTION 421.46
   421.46 Pretreatment standards for new sources.
40:31.0.1.1.21.4.5.8SECTION 421.47
   421.47 [Reserved]
40:31.0.1.1.21.5SUBPART E
Subpart E - Primary Electrolytic Copper Refining Subcategory
40:31.0.1.1.21.5.5.1SECTION 421.50
   421.50 Applicability: Description of the primary electrolytic copper refining subcategory.
40:31.0.1.1.21.5.5.2SECTION 421.51
   421.51 Specialized definitions.
40:31.0.1.1.21.5.5.3SECTION 421.52
   421.52 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.5.5.4SECTION 421.53
   421.53 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.5.5.5SECTION 421.54
   421.54 Standards of performance for new sources.
40:31.0.1.1.21.5.5.6SECTION 421.55
   421.55 [Reserved]
40:31.0.1.1.21.5.5.7SECTION 421.56
   421.56 Pretreatment standards for new sources.
40:31.0.1.1.21.5.5.8SECTION 421.57
   421.57 [Reserved]
40:31.0.1.1.21.6SUBPART F
Subpart F - Secondary Copper Subcategory
40:31.0.1.1.21.6.5.1SECTION 421.60
   421.60 Applicability: Description of the secondary copper subcategory.
40:31.0.1.1.21.6.5.2SECTION 421.61
   421.61 Specialized definitions.
40:31.0.1.1.21.6.5.3SECTION 421.62
   421.62 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.6.5.4SECTION 421.63
   421.63 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.6.5.5SECTION 421.64
   421.64 Standards of performance for new sources.
40:31.0.1.1.21.6.5.6SECTION 421.65
   421.65 Pretreatment standards for existing sources.
40:31.0.1.1.21.6.5.7SECTION 421.66
   421.66 Pretreatment standards for new sources.
40:31.0.1.1.21.6.5.8SECTION 421.67
   421.67 [Reserved]
40:31.0.1.1.21.7SUBPART G
Subpart G - Primary Lead Subcategory
40:31.0.1.1.21.7.5.1SECTION 421.70
   421.70 Applicability: Description of the primary lead subcategory.
40:31.0.1.1.21.7.5.2SECTION 421.71
   421.71 Specialized definitions.
40:31.0.1.1.21.7.5.3SECTION 421.72
   421.72 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.7.5.4SECTION 421.73
   421.73 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.7.5.5SECTION 421.74
   421.74 Standards of performance for new sources.
40:31.0.1.1.21.7.5.6SECTION 421.75
   421.75 Pretreatment standards for existing sources.
40:31.0.1.1.21.7.5.7SECTION 421.76
   421.76 Pretreatment standards for new sources.
40:31.0.1.1.21.7.5.8SECTION 421.77
   421.77 [Reserved]
40:31.0.1.1.21.8SUBPART H
Subpart H - Primary Zinc Subcategory
40:31.0.1.1.21.8.5.1SECTION 421.80
   421.80 Applicability: Description of the primary zinc subcategory.
40:31.0.1.1.21.8.5.2SECTION 421.81
   421.81 Specialized definitions.
40:31.0.1.1.21.8.5.3SECTION 421.82
   421.82 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.8.5.4SECTION 421.83
   421.83 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.8.5.5SECTION 421.84
   421.84 Standards of performance for new sources.
40:31.0.1.1.21.8.5.6SECTION 421.85
   421.85 Pretreatment standards for existing sources.
40:31.0.1.1.21.8.5.7SECTION 421.86
   421.86 Pretreatment standards for new sources.
40:31.0.1.1.21.8.5.8SECTION 421.87
   421.87 [Reserved]
40:31.0.1.1.21.9SUBPART I
Subpart I - Metallurgical Acid Plants Subcategory
40:31.0.1.1.21.9.5.1SECTION 421.90
   421.90 Applicability: Description of the metallurgical acid plants subcategory.
40:31.0.1.1.21.9.5.2SECTION 421.91
   421.91 Specialized definitions.
40:31.0.1.1.21.9.5.3SECTION 421.92
   421.92 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.9.5.4SECTION 421.93
   421.93 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.9.5.5SECTION 421.94
   421.94 Standards of performance for new sources.
40:31.0.1.1.21.9.5.6SECTION 421.95
   421.95 Pretreatment standards for existing sources.
40:31.0.1.1.21.9.5.7SECTION 421.96
   421.96 Pretreatment standards for new sources.
40:31.0.1.1.21.9.5.8SECTION 421.97
   421.97 [Reserved]
40:31.0.1.1.21.10SUBPART J
Subpart J - Primary Tungsten Subcategory
40:31.0.1.1.21.10.5.1SECTION 421.100
   421.100 Applicability: Description of the primary tungsten subcategory.
40:31.0.1.1.21.10.5.2SECTION 421.101
   421.101 Specialized definitions.
40:31.0.1.1.21.10.5.3SECTION 421.102
   421.102 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.10.5.4SECTION 421.103
   421.103 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.10.5.5SECTION 421.104
   421.104 Standards of performance for new sources.
40:31.0.1.1.21.10.5.6SECTION 421.105
   421.105 Pretreatment standards for existing sources.
40:31.0.1.1.21.10.5.7SECTION 421.106
   421.106 Pretreatment standards for new sources.
40:31.0.1.1.21.10.5.8SECTION 421.107
   421.107 [Reserved]
40:31.0.1.1.21.11SUBPART K
Subpart K - Primary Columbium-Tantalum Subcategory
40:31.0.1.1.21.11.5.1SECTION 421.110
   421.110 Applicability: Description of the primary columbium-tantalum subcategory.
40:31.0.1.1.21.11.5.2SECTION 421.111
   421.111 Specialized definitions.
40:31.0.1.1.21.11.5.3SECTION 421.112
   421.112 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.11.5.4SECTION 421.113
   421.113 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.11.5.5SECTION 421.114
   421.114 Standards of performance for new sources.
40:31.0.1.1.21.11.5.6SECTION 421.115
   421.115 Pretreatment standards for existing sources.
40:31.0.1.1.21.11.5.7SECTION 421.116
   421.116 Pretreatment standards for new sources.
40:31.0.1.1.21.11.5.8SECTION 421.117
   421.117 [Reserved]
40:31.0.1.1.21.12SUBPART L
Subpart L - Secondary Silver Subcategory
40:31.0.1.1.21.12.5.1SECTION 421.120
   421.120 Applicability: Description of the secondary silver subcategory.
40:31.0.1.1.21.12.5.2SECTION 421.121
   421.121 Specialized definitions.
40:31.0.1.1.21.12.5.3SECTION 421.122
   421.122 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.12.5.4SECTION 421.123
   421.123 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.12.5.5SECTION 421.124
   421.124 Standards of performance for new sources.
40:31.0.1.1.21.12.5.6SECTION 421.125
   421.125 Pretreatment standards for existing sources.
40:31.0.1.1.21.12.5.7SECTION 421.126
   421.126 Pretreatment standards for new sources.
40:31.0.1.1.21.12.5.8SECTION 421.127
   421.127 [Reserved]
40:31.0.1.1.21.13SUBPART M
Subpart M - Secondary Lead Subcategory
40:31.0.1.1.21.13.5.1SECTION 421.130
   421.130 Applicability: Description of the secondary lead subcategory.
40:31.0.1.1.21.13.5.2SECTION 421.131
   421.131 Specialized definitions.
40:31.0.1.1.21.13.5.3SECTION 421.132
   421.132 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.13.5.4SECTION 421.133
   421.133 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.13.5.5SECTION 421.134
   421.134 Standards of performance for new sources.
40:31.0.1.1.21.13.5.6SECTION 421.135
   421.135 Pretreatment standards for existing sources.
40:31.0.1.1.21.13.5.7SECTION 421.136
   421.136 Pretreatment standards for new sources.
40:31.0.1.1.21.13.5.8SECTION 421.137
   421.137 [Reserved]
40:31.0.1.1.21.14SUBPART N
Subpart N - Primary Antimony Subcategory
40:31.0.1.1.21.14.5.1SECTION 421.140
   421.140 Applicability: Description of the primary antimony subcategory.
40:31.0.1.1.21.14.5.2SECTION 421.141
   421.141 Specialized definitions.
40:31.0.1.1.21.14.5.3SECTION 421.142
   421.142 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.14.5.4SECTION 421.143
   421.143 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.14.5.5SECTION 421.144
   421.144 Standards of performance for new sources.
40:31.0.1.1.21.14.5.6SECTION 421.145
   421.145 [Reserved]
40:31.0.1.1.21.14.5.7SECTION 421.146
   421.146 Pretreatment standards for new sources.
40:31.0.1.1.21.14.5.8SECTION 421.147
   421.147 [Reserved]
40:31.0.1.1.21.15SUBPART O
Subpart O - Primary Beryllium Subcategory
40:31.0.1.1.21.15.5.1SECTION 421.150
   421.150 Applicability: Description of the primary beryllium subcategory.
40:31.0.1.1.21.15.5.2SECTION 421.151
   421.151 Specialized definitions.
40:31.0.1.1.21.15.5.3SECTION 421.152
   421.152 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.15.5.4SECTION 421.153
   421.153 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.15.5.5SECTION 421.154
   421.154 Standards of performance for new sources.
40:31.0.1.1.21.15.5.6SECTION 421.155
   421.155 [Reserved]
40:31.0.1.1.21.15.5.7SECTION 421.156
   421.156 Pretreatment standards for new sources.
40:31.0.1.1.21.15.5.8SECTION 421.157
   421.157 [Reserved]
40:31.0.1.1.21.16SUBPART P
Subpart P - Primary and Secondary Germanium and Gallium Subcategory
40:31.0.1.1.21.16.5.1SECTION 421.180
   421.180 Applicability: Description of the primary and secondary germanium and gallium subcategory.
40:31.0.1.1.21.16.5.2SECTION 421.181
   421.181 Specialized definitions.
40:31.0.1.1.21.16.5.3SECTION 421.182
   421.182 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.16.5.4SECTION 421.183
   421.183 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.16.5.5SECTION 421.184
   421.184 Standards of performance for new sources.
40:31.0.1.1.21.16.5.6SECTION 421.185
   421.185 Pretreatment standards for existing sources.
40:31.0.1.1.21.16.5.7SECTION 421.186
   421.186 Pretreatment standards for new sources.
40:31.0.1.1.21.16.5.8SECTION 421.187
   421.187 [Reserved]
40:31.0.1.1.21.17SUBPART Q
Subpart Q - Secondary Indium Subcategory
40:31.0.1.1.21.17.5.1SECTION 421.190
   421.190 Applicability: Description of the secondary indium subcategory.
40:31.0.1.1.21.17.5.2SECTION 421.191
   421.191 Specialized definitions.
40:31.0.1.1.21.17.5.3SECTION 421.192-421.193
   421.192-421.193 [Reserved]
40:31.0.1.1.21.17.5.4SECTION 421.194
   421.194 Standards of performance for new sources.
40:31.0.1.1.21.17.5.5SECTION 421.195
   421.195 Pretreatment standards for existing sources.
40:31.0.1.1.21.17.5.6SECTION 421.196
   421.196 Pretreatment standards for new sources.
40:31.0.1.1.21.17.5.7SECTION 421.197
   421.197 [Reserved]
40:31.0.1.1.21.18SUBPART R
Subpart R - Secondary Mercury Subcategory
40:31.0.1.1.21.18.5.1SECTION 421.200
   421.200 Applicability: Description of the secondary mercury subcategory.
40:31.0.1.1.21.18.5.2SECTION 421.201
   421.201 Specialized definitions.
40:31.0.1.1.21.18.5.3SECTION 421.202-421.203
   421.202-421.203 [Reserved]
40:31.0.1.1.21.18.5.4SECTION 421.204
   421.204 Standards of performance for new sources.
40:31.0.1.1.21.18.5.5SECTION 421.205
   421.205 [Reserved]
40:31.0.1.1.21.18.5.6SECTION 421.206
   421.206 Pretreatment standards for new sources.
40:31.0.1.1.21.18.5.7SECTION 421.207
   421.207 [Reserved]
40:31.0.1.1.21.19SUBPART S
Subpart S - Primary Molybdenum and Rhenium Subcategory
40:31.0.1.1.21.19.5.1SECTION 421.210
   421.210 Applicability: Description of the primary molybdenum and rhenium subcategory.
40:31.0.1.1.21.19.5.2SECTION 421.211
   421.211 Specialized definitions.
40:31.0.1.1.21.19.5.3SECTION 421.212
   421.212 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.19.5.4SECTION 421.213
   421.213 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.19.5.5SECTION 421.214
   421.214 Standards of performance for new sources.
40:31.0.1.1.21.19.5.6SECTION 421.215
   421.215 [Reserved]
40:31.0.1.1.21.19.5.7SECTION 421.216
   421.216 Pretreatment standards for new sources.
40:31.0.1.1.21.19.5.8SECTION 421.217
   421.217 [Reserved]
40:31.0.1.1.21.20SUBPART T
Subpart T - Secondary Molybdenum and Vanadium Subcategory
40:31.0.1.1.21.20.5.1SECTION 421.220
   421.220 Applicability: Description of the secondary molybdenum and vanadium subcategory.
40:31.0.1.1.21.20.5.2SECTION 421.221
   421.221 Specialized definitions.
40:31.0.1.1.21.20.5.3SECTION 421.222
   421.222 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.20.5.4SECTION 421.223
   421.223 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.20.5.5SECTION 421.224
   421.224 Standards of performance for new sources.
40:31.0.1.1.21.20.5.6SECTION 421.225
   421.225 [Reserved]
40:31.0.1.1.21.20.5.7SECTION 421.226
   421.226 Pretreatment standards for new sources.
40:31.0.1.1.21.20.5.8SECTION 421.227
   421.227 [Reserved]
40:31.0.1.1.21.21SUBPART U
Subpart U - Primary Nickel and Cobalt Subcategory
40:31.0.1.1.21.21.5.1SECTION 421.230
   421.230 Applicability: Description of the primary nickel and cobalt subcategory.
40:31.0.1.1.21.21.5.2SECTION 421.231
   421.231 Specialized definitions.
40:31.0.1.1.21.21.5.3SECTION 421.232
   421.232 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.21.5.4SECTION 421.233
   421.233 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.21.5.5SECTION 421.234
   421.234 Standards of performance for new sources.
40:31.0.1.1.21.21.5.6SECTION 421.235
   421.235 [Reserved]
40:31.0.1.1.21.21.5.7SECTION 421.236
   421.236 Pretreatment standards for new sources.
40:31.0.1.1.21.21.5.8SECTION 421.237
   421.237 [Reserved]
40:31.0.1.1.21.22SUBPART V
Subpart V - Secondary Nickel Subcategory
40:31.0.1.1.21.22.5.1SECTION 421.240
   421.240 Applicability: Description of the secondary nickel subcategory.
40:31.0.1.1.21.22.5.2SECTION 421.241
   421.241 Specialized definitions.
40:31.0.1.1.21.22.5.3SECTION 421.242-421.243
   421.242-421.243 [Reserved]
40:31.0.1.1.21.22.5.4SECTION 421.244
   421.244 Standards of performance for new sources.
40:31.0.1.1.21.22.5.5SECTION 421.245
   421.245 Pretreatment standards for existing sources.
40:31.0.1.1.21.22.5.6SECTION 421.246
   421.246 Pretreatment standards for new sources.
40:31.0.1.1.21.22.5.7SECTION 421.247
   421.247 [Reserved]
40:31.0.1.1.21.23SUBPART W
Subpart W - Primary Precious Metals and Mercury Subcategory
40:31.0.1.1.21.23.5.1SECTION 421.250
   421.250 Applicability: Description of the primary precious metals and mercury subcategory.
40:31.0.1.1.21.23.5.2SECTION 421.251
   421.251 Specialized definitions.
40:31.0.1.1.21.23.5.3SECTION 421.252
   421.252 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.23.5.4SECTION 421.253
   421.253 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.23.5.5SECTION 421.254
   421.254 Standards of performance for new sources.
40:31.0.1.1.21.23.5.6SECTION 421.255
   421.255 [Reserved]
40:31.0.1.1.21.23.5.7SECTION 421.256
   421.256 Pretreatment standards for new sources.
40:31.0.1.1.21.23.5.8SECTION 421.257
   421.257 [Reserved]
40:31.0.1.1.21.24SUBPART X
Subpart X - Secondary Precious Metals Subcategory
40:31.0.1.1.21.24.5.1SECTION 421.260
   421.260 Applicability: Description of the secondary precious metals subcategory.
40:31.0.1.1.21.24.5.2SECTION 421.261
   421.261 Specialized definitions.
40:31.0.1.1.21.24.5.3SECTION 421.262
   421.262 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.24.5.4SECTION 421.263
   421.263 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.24.5.5SECTION 421.264
   421.264 Standards of performance for new sources.
40:31.0.1.1.21.24.5.6SECTION 421.265
   421.265 Pretreatment standards for existing sources.
40:31.0.1.1.21.24.5.7SECTION 421.266
   421.266 Pretreatment standards for new sources.
40:31.0.1.1.21.24.5.8SECTION 421.267
   421.267 [Reserved]
40:31.0.1.1.21.25SUBPART Y
Subpart Y - Primary Rare Earth Metals Subcategory
40:31.0.1.1.21.25.5.1SECTION 421.270
   421.270 Applicability: Description of the primary rare earth metals subcategory.
40:31.0.1.1.21.25.5.2SECTION 421.271
   421.271 Specialized definitions.
40:31.0.1.1.21.25.5.3SECTION 421.272-421.273
   421.272-421.273 [Reserved]
40:31.0.1.1.21.25.5.4SECTION 421.274
   421.274 Standards of performance for new sources.
40:31.0.1.1.21.25.5.5SECTION 421.275
   421.275 Pretreatment standards for existing sources.
40:31.0.1.1.21.25.5.6SECTION 421.276
   421.276 Pretreatment standards for new sources.
40:31.0.1.1.21.25.5.7SECTION 421.277
   421.277 [Reserved]
40:31.0.1.1.21.26SUBPART Z
Subpart Z - Secondary Tantalum Subcategory
40:31.0.1.1.21.26.5.1SECTION 421.280
   421.280 Applicability: Description of the secondary tantalum subcategory.
40:31.0.1.1.21.26.5.2SECTION 421.281
   421.281 Specialized definitions.
40:31.0.1.1.21.26.5.3SECTION 421.282
   421.282 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.26.5.4SECTION 421.283
   421.283 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.26.5.5SECTION 421.284
   421.284 Standards of performance for new sources.
40:31.0.1.1.21.26.5.6SECTION 421.285
   421.285 [Reserved]
40:31.0.1.1.21.26.5.7SECTION 421.286
   421.286 Pretreatment standards for new sources.
40:31.0.1.1.21.26.5.8SECTION 421.287
   421.287 [Reserved]
40:31.0.1.1.21.27SUBPART AA
Subpart AA - Secondary Tin Subcategory
40:31.0.1.1.21.27.5.1SECTION 421.290
   421.290 Applicability: Description of the secondary tin subcategory.
40:31.0.1.1.21.27.5.2SECTION 421.291
   421.291 Specialized definitions.
40:31.0.1.1.21.27.5.3SECTION 421.292
   421.292 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.27.5.4SECTION 421.293
   421.293 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.27.5.5SECTION 421.294
   421.294 Standards of performance for new sources.
40:31.0.1.1.21.27.5.6SECTION 421.295
   421.295 Pretreatment standards for existing sources.
40:31.0.1.1.21.27.5.7SECTION 421.296
   421.296 Pretreatment standards for new sources.
40:31.0.1.1.21.27.5.8SECTION 421.297
   421.297 [Reserved]
40:31.0.1.1.21.28SUBPART AB
Subpart AB - Primary and Secondary Titanium Subcategory
40:31.0.1.1.21.28.5.1SECTION 421.300
   421.300 Applicability: Description of the primary and secondary titanium subcategory.
40:31.0.1.1.21.28.5.2SECTION 421.301
   421.301 Specialized definitions.
40:31.0.1.1.21.28.5.3SECTION 421.302
   421.302 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.28.5.4SECTION 421.303
   421.303 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.28.5.5SECTION 421.304
   421.304 Standards of performance for new sources.
40:31.0.1.1.21.28.5.6SECTION 421.305
   421.305 Pretreatment standards for existing sources.
40:31.0.1.1.21.28.5.7SECTION 421.306
   421.306 Pretreatment standards for new sources.
40:31.0.1.1.21.28.5.8SECTION 421.307
   421.307 [Reserved]
40:31.0.1.1.21.29SUBPART AC
Subpart AC - Secondary Tungsten and Cobalt Subcategory
40:31.0.1.1.21.29.5.1SECTION 421.310
   421.310 Applicability: Description of the secondary tungsten and cobalt subcategory.
40:31.0.1.1.21.29.5.2SECTION 421.311
   421.311 Specialized definitions.
40:31.0.1.1.21.29.5.3SECTION 421.312
   421.312 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.29.5.4SECTION 421.313
   421.313 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.29.5.5SECTION 421.314
   421.314 Standards of performance for new sources.
40:31.0.1.1.21.29.5.6SECTION 421.315
   421.315 Pretreatment standards for existing sources.
40:31.0.1.1.21.29.5.7SECTION 421.316
   421.316 Pretreatment standards for new sources.
40:31.0.1.1.21.29.5.8SECTION 421.317
   421.317 [Reserved]
40:31.0.1.1.21.30SUBPART AD
Subpart AD - Secondary Uranium Subcategory
40:31.0.1.1.21.30.5.1SECTION 421.320
   421.320 Applicability: Description of the secondary uranium subcategory.
40:31.0.1.1.21.30.5.2SECTION 421.321
   421.321 Specialized definitions.
40:31.0.1.1.21.30.5.3SECTION 421.322
   421.322 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.30.5.4SECTION 421.323
   421.323 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.30.5.5SECTION 421.324
   421.324 Standards of performance for new sources.
40:31.0.1.1.21.30.5.6SECTION 421.325
   421.325 [Reserved]
40:31.0.1.1.21.30.5.7SECTION 421.326
   421.326 Pretreatment standards for new sources.
40:31.0.1.1.21.30.5.8SECTION 421.327
   421.327 [Reserved]
40:31.0.1.1.21.31SUBPART AE
Subpart AE - Primary Zirconium and Hafnium Subcategory
40:31.0.1.1.21.31.5.1SECTION 421.330
   421.330 Applicability: Description of the primary zirconium and hafnium subcategory.
40:31.0.1.1.21.31.5.2SECTION 421.331
   421.331 Specialized definitions.
40:31.0.1.1.21.31.5.3SECTION 421.332
   421.332 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.31.5.4SECTION 421.333
   421.333 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.31.5.5SECTION 421.334
   421.334 Standards of performance for new sources.
40:31.0.1.1.21.31.5.6SECTION 421.335
   421.335 [Reserved]
40:31.0.1.1.21.31.5.7SECTION 421.336
   421.336 Pretreatment standards for new sources.
40:31.0.1.1.21.31.5.8SECTION 421.337
   421.337 [Reserved]