27.
18. Bromodichloromethane...........  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
19. Bromoform......................  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
20. Bromomethane...................  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
21. 4-Bromophenyl phenyl ether.....  GC....................  611...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
22. Carbon tetrachloride...........  GC....................  601...................  6200 C-2020..........  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\

23. 4-Chloro-3-methyl phenol.......  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
24. Chlorobenzene..................  GC....................  601, 602..............  6200 C-2020..........  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
25. Chloroethane...................  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96.\13\
26. 2-Chloroethylvinyl ether.......  GC....................  601...................
                                     GC/MS.................  624.1, 1624B..........
27. Chloroform.....................  GC....................  601...................  6200 C-2020..........  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
28. Chloromethane..................  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
29. 2-Chloronaphthalene............  GC....................  612...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
30. 2-Chlorophenol.................  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
31. 4-Chlorophenyl phenyl ether....  GC....................  611...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
32. Chrysene.......................  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........  D4657-92 (98)........
33. Dibenzo(a,h)anthracene.........  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........  D4657-92 (98)........
34. Dibromochloromethane...........  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
35. 1,2-Dichlorobenzene............  GC....................  601, 602..............  6200 C-2020..........
                                     GC/MS.................  624.1, 1625B..........  6200 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27 O-4127-96,\13\ O-
                                                                                4436-16.\14\
36. 1,3-Dichlorobenzene............  GC....................  601, 602..............  6200 C-2020..........
                                     GC/MS.................  624.1, 1625B..........  6200 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27 O-4127-96.\13\
37. 1,4-Dichlorobenzene............  GC....................  601, 602..............  6200 C-2020..........
                                     GC/MS.................  624.1, 1625B..........  6200 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27 O-4127-96,\13\ O-
                                                                                4436-16.\14\
38. 3,3'-Dichlorobenzidine.........  GC/MS.................  625.1, 1625B..........  6410 B-2020..........
                                     HPLC..................  605...................
39. Dichlorodifluoromethane........  GC....................  601...................
                                     GC/MS.................  ......................  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
40. 1,1-Dichloroethane.............  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
41. 1,2-Dichloroethane.............  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
42. 1,1-Dichloroethene.............  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
43. trans-1,2-Dichloroethene.......  GC....................  601...................  6200 C-2020..........

                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
44. 2,4-Dichlorophenol.............  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
45. 1,2-Dichloropropane............  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
46. cis-1,3-Dichloropropene........  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
47. trans-1,3-Dichloropropene......  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
48. Diethyl phthalate..............  GC....................  606...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
49. 2,4-Dimethylphenol.............  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
50. Dimethyl phthalate.............  GC....................  606...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
51. Di-n-butyl phthalate...........  GC....................  606...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
52. Di-n-octyl phthalate...........  GC....................  606...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
53. 2, 4-Dinitrophenol.............  GC....................  604...................  6420 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........
54. 2,4-Dinitrotoluene.............  GC....................  609...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
55. 2,6-Dinitrotoluene.............  GC....................  609...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
56. Epichlorohydrin................  GC....................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  ......................  .....................  .....................  See footnote,\6\ p.
                                                                                S102.
57. Ethylbenzene...................  GC....................  602...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
58. Fluoranthene...................  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........  D4657-92 (98)........
59. Fluorene.......................  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........  D4657-92 (98)........
60. 1,2,3,4,6,7,8-Heptachloro-       GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
61. 1,2,3,4,7,8,9-Heptachloro-       GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
62. 1,2,3,4,6,7,8- Heptachloro-      GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzo-p-dioxin.                                                                                16130-SSI.\16\
63. Hexachlorobenzene..............  GC....................  612...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
64. Hexachlorobutadiene............  GC....................  612...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27 O-4127-96.\13\
65. Hexachlorocyclopentadiene......  GC....................  612...................
                                     GC/MS.................  625.1,\5\ 1625B.......  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27 O-4127-96.\13\
66. 1,2,3,4,7,8-Hexachloro-          GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\

67. 1,2,3,6,7,8-Hexachloro-          GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
68. 1,2,3,7,8,9-Hexachloro-          GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
69. 2,3,4,6,7,8-Hexachloro-          GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
70. 1,2,3,4,7,8-Hexachloro-dibenzo-  GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 p-dioxin.                                                                                16130-SSI,\16\ G
                                                                                BHTYHGTGB B VB B5
                                                                                BV.
71. 1,2,3,6,7,8-Hexachloro-dibenzo-  GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 p-dioxin.                                                                                16130-SSI.\16\
72. 1,2,3,7,8,9-Hexachloro-dibenzo-  GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 p-dioxin.                                                                                16130-SSI.\16\
73. Hexachloroethane...............  GC....................  612...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27 O-4127-96.\13\
74. Indeno(1,2,3-c,d) pyrene.......  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........  D4657-92 (98)........
75. Isophorone.....................  GC....................  609...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
76. Methylene chloride.............  GC....................  601...................  6200 C-2020..........  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
77. 2-Methyl-4,6-dinitrophenol.....  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
78. Naphthalene....................  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........
79. Nitrobenzene...................  GC....................  609...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  ......................  .....................  D4657-92 (98)........
80. 2-Nitrophenol..................  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
81. 4-Nitrophenol..................  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
82. N-Nitrosodimethylamine.........  GC....................  607...................
                                     GC/MS.................  625.1,\5\ 1625B.......  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
83. N-Nitrosodi-n-propylamine......  GC....................  607...................
                                     GC/MS.................  625.1,\5\ 1625B.......  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
84. N-Nitrosodiphenylamine.........  GC....................  607...................
                                     GC/MS.................  625.1,\5\ 1625B.......  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
85. Octachlorodibenzofuran.........  GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
                                                                                16130-SSI.\16\
86. Octachlorodibenzo-p-dioxin.....  GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
                                                                                16130-SSI.\16\
87. 2,2'-oxybis(1-chloropropane)     GC....................  611...................
 \12\ [also known as bis(2-Chloro-1-
 methylethyl) ether].
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
88. PCB-1016.......................  GC....................  608.3.................  .....................  .....................  See footnote,\3\ p.
                                                                                43; See footnote.\8\
                                     GC/MS.................  625.1.................  6410 B-2020..........

89. PCB-1221.......................  GC....................  608.3.................  .....................  .....................  See footnote,\3\ p.
                                                                                43; See footnote.\8\
                                     GC/MS.................  625.1.................  6410 B-2020..........
90. PCB-1232.......................  GC....................  608.3.................  .....................  .....................  See footnote,\3\ p.
                                                                                43; See footnote.\8\
                                     GC/MS.................  625.1.................  6410 B-2020..........
91. PCB-1242.......................  GC....................  608.3.................  .....................  .....................  See footnote,\3\ p.
                                                                                43; See footnote.\8\
                                     GC/MS.................  625.1.................  6410 B-2020..........
92. PCB-1248.......................  GC....................  608.3.................  .....................  .....................  See footnote,\3\ p.
                                                                                43; See footnote.\8\
                                     GC/MS.................  625.1.................  6410 B-2020..........
93. PCB-1254.......................  GC....................  608.3.................  .....................  .....................  See footnote,\3\ p.
                                                                                43; See footnote.\8\
                                     GC/MS.................  625.1.................  6410 B-2020..........
94. PCB-1260.......................  GC....................  608.3.................  .....................  .....................  See footnote,\3\ p.
                                                                                43; See footnote.\8\
                                     GC/MS.................  625.1.................  6410 B-2020..........
95. 1,2,3,7,8-Pentachloro-           GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
96. 2,3,4,7,8-Pentachloro-           GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
97. 1,2,3,7,8-Pentachloro-dibenzo-p- GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dioxin.                                                                                16130-SSI.\16\
98. Pentachlorophenol..............  GC....................  604...................  6420 B-2020..........  .....................  See footnote,\3\ p.
                                                                                140.
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
99. Phenanthrene...................  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........  D4657-92 (98)........
100. Phenol........................  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
101. Pyrene........................  GC....................  610...................
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
                                     HPLC..................  610...................  6440 B-2021..........  D4657-92 (98)........
102. 2,3,7,8-Tetrachloro-            GC/MS.................  1613B \10\............  .....................  .....................  ATM 16130,\15\ PAM
 dibenzofuran.                                                                                16130-SSI.\16\
103. 2,3,7,8-Tetrachloro-dibenzo-p-  GC/MS.................  613, 625.1,\5a\ 1613B.  .....................  .....................  ATM 16130,\15\ PAM
 dioxin.                                                                                16130-SSI.\16\
104. 1,1,2,2-Tetrachloroethane.....  GC....................  601...................  6200 C-2020..........  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96.\13\
105. Tetrachloroethene.............  GC....................  601...................  6200 C-2020..........  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
106. Toluene.......................  GC....................  602...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
107. 1,2,4-Trichlorobenzene........  GC....................  612...................  .....................  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27 O-4127-96,\13\ O-
                                                                                4436-16.\14\
108. 1,1,1-Trichloroethane.........  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
109. 1,1,2-Trichloroethane.........  GC....................  601...................  6200 C-2020..........  .....................  See footnote,\3\ p.
                                                                                130.
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
110. Trichloroethene...............  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
111. Trichlorofluoromethane........  GC....................  601...................  6200 C-2020..........

                                     GC/MS.................  624.1.................  6200 B-2020..........  .....................  O-4127-96.\13\
112. 2,4,6-Trichlorophenol.........  GC....................  604...................  6420 B-2020..........
                                     GC/MS.................  625.1, 1625B..........  6410 B-2020..........  .....................  See footnote,\9\ p.
                                                                                27.
113. Vinyl chloride................  GC....................  601...................  6200 C-2020..........
                                     GC/MS.................  624.1, 1624B..........  6200 B-2020..........  .....................  O-4127-96,\13\ O-4436-
                                                                                16.\14\
114. Nonylphenol...................  GC/MS.................  ......................  .....................  D7065-17.............
115. Bisphenol A (BPA).............  GC/MS.................  ......................  .....................  D7065-17.............
116. p-tert-Octylphenol (OP).......  GC/MS.................  ......................  .....................  D7065-17.............
117. Nonylphenol Monoethoxylate      GC/MS.................  ......................  .....................  D7065-17.............
 (NP1EO).
118. Nonylphenol Diethoxylate        GC/MS.................  ......................  .....................  D7065-17.............
 (NP2EO).
119. Adsorbable Organic Halides      Adsorption and          1650 \11\.............
 (AOX).                               Coulometric Titration.
120. Chlorinated Phenolics.........  In Situ Acetylation     1653 \11\.............
                                      and GC/MS.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Table IC notes:
\1\ All parameters are expressed in micrograms per liter ([micro]g/L) except for Method 1613B, in which the parameters are expressed in picograms per
  liter (pg/L).
\2\ The full text of Methods 601-613, 1613B, 1624B, and 1625B are provided at appendix A, Test Procedures for Analysis of Organic Pollutants. The
  standardized test procedure to be used to determine the method detection limit (MDL) for these test procedures is given at appendix B of this part,
  Definition and Procedure for the Determination of the Method Detection Limit. These methods are available at: https://www.epa.gov/cwa-methods as
  individual PDF files.
\3\ Methods for Benzidine: Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater. September 1978. U.S. EPA.
\4\ Method 624.1 may be used for quantitative determination of acrolein and acrylonitrile, provided that the laboratory has documentation to
  substantiate the ability to detect and quantify these analytes at levels necessary to comply with any associated regulations. In addition, the use of
  sample introduction techniques other than simple purge-and-trap may be required. QC acceptance criteria from Method 603 should be used when analyzing
  samples for acrolein and acrylonitrile in the absence of such criteria in Method 624.1.
\5\ Method 625.1 may be extended to include benzidine, hexachlorocyclopentadiene, N-nitrosodimethylamine, N-nitrosodi-n-propylamine, and N-
  nitrosodiphenylamine. However, when they are known to be present, Methods 605, 607, and 612, or Method 1625B, are preferred methods for these
  compounds.
\5a\ Method 625.1 screening only.
\6\ Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of Standard
  Methods for the Examination of Water and Wastewater. 1981. American Public Health Association (APHA).
\7\ Each analyst must make an initial, one-time demonstration of their ability to generate acceptable precision and accuracy with Methods 601-603,
  1624B, and 1625B in accordance with procedures in Section 8.2 of each of these methods. Additionally, each laboratory, on an on-going basis must spike
  and analyze 10% (5% for Methods 624.1 and 625.1 and 100% for methods 1624B and 1625B) of all samples to monitor and evaluate laboratory data quality
  in accordance with Sections 8.3 and 8.4 of these methods. When the recovery of any parameter falls outside the quality control (QC) acceptance
  criteria in the pertinent method, analytical results for that parameter in the unspiked sample are suspect. The results should be reported but cannot
  be used to demonstrate regulatory compliance. If the method does not contain QC acceptance criteria, control limits of  three standard
  deviations around the mean of a minimum of five replicate measurements must be used. These quality control requirements also apply to the Standard
  Methods, ASTM Methods, and other methods cited.
\8\ Organochlorine Pesticides and PCBs in Wastewater Using Empore\TM\ Disk. Revised October 28, 1994. 3M Corporation.
\9\ Method O-3116-87 is in Open File Report 93-125, Methods of Analysis by U.S. Geological Survey National Water Quality Laboratory--Determination of
  Inorganic and Organic Constituents in Water and Fluvial Sediments. 1993. USGS.
\10\ Analysts may use Fluid Management Systems, Inc. Power-Prep system in place of manual cleanup provided the analyst meets the requirements of Method
  1613B (as specified in Section 9 of the method) and permitting authorities. Method 1613, Revision B, Tetra- through Octa-Chlorinated Dioxins and
  Furans by Isotope Dilution HRGC/HRMS. Revision B, 1994. U.S. EPA. The full text of this method is provided in appendix A to this part and at https://www.epa.gov/cwa-methods/approved-cwa-test-methods-organic-compounds.
\11\ Method 1650, Adsorbable Organic Halides by Adsorption and Coulometric Titration. Revision C, 1997 U.S. EPA. Method 1653, Chlorinated Phenolics in
  Wastewater by In Situ Acetylation and GCMS. Revision A, 1997 U.S. EPA. The full text for both of these methods is provided at appendix A in part 430
  of this chapter, The Pulp, Paper, and Paperboard Point Source Category.
\12\ The compound was formerly inaccurately labeled as 2,2'-oxybis(2-chloropropane) and bis(2-chloroisopropyl) ether. Some versions of Methods 611, and
  1625 inaccurately list the analyte as ``bis(2-chloroisopropyl) ether,'' but use the correct CAS number of 108-60-1.
\13\ Method O-4127-96, U.S. Geological Survey Open-File Report 97-829, Methods of analysis by the U.S. Geological Survey National Water Quality
  Laboratory--Determination of 86 volatile organic compounds in water by gas chromatography/mass spectrometry, including detections less than reporting
  limits, 1998, USGS.
\14\ Method O-4436-16 U.S. Geological Survey Techniques and Methods, book 5, chap. B12, Determination of heat purgeable and ambient purgeable volatile
  organic compounds in water by gas chromatography/mass spectrometry, 2016, USGS.
\15\ Please refer to the following Quality Control Section: Part 6000 Individual Organic Compounds, 6020 (2019) \16\ SGS AXYS Method ATM 16130,
  ``Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo-p-Dioxins and Dibenzofurans (CDDs/CDFs) Using Waters and Agilent Gas
  Chromatography-Tandem-Mass Spectrometry (GC/MS/MS), Revision 1.0, '' is available at: https://www.sgsaxys.com/wp-content/uploads/2022/09/SGS-AXYS-Method-16130-Rev-1.0.pdf.
\16\ Pace Analytical Method PAM-16130-SSI, ``Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo-p-Dioxins and Dibenzofurans
  (CDDs/CDFs) Using Shimadzu Gas Chromatography Mass Spectrometry (GC-MS/MS), Revision 1.1,'' is available at: www.pacelabs.com.

                                              Table ID--List of Approved Test Procedures for Pesticides \1\
--------------------------------------------------------------------------------------------------------------------------------------------------------
             Parameter                       Method             EPA \2\ \7\ \10\     Standard methods \15\           ASTM                  Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
1. Aldrin..........................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-96     See footnote,\3\ p.
                                                                                (02).                  7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
2. Ametryn.........................  GC....................  507, 619..............  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\9\
                                                                                O-3106-93; See
                                                                                footnote,\6\ p. S68.
                                     GC/MS.................  525.2, 625.1..........  .....................  .....................  See footnote,\14\ O-
                                                                                1121-91.
3. Aminocarb.......................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                94; See footnote,\6\
                                                                                p. S60.
                                     HPLC..................  632...................
4. Atraton.........................  GC....................  619...................  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\6\
                                                                                p. S68.
                                     GC/MS.................  625.1.................
5. Atrazine........................  GC....................  507, 619, 608.3.......  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\6\
                                                                                p. S68; See
                                                                                footnote,\9\ O-3106-
                                                                                93.
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
                                     GC/MS.................  525.1, 525.2, 625.1...  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
6. Azinphos methyl.................  GC....................  614, 622, 1657........  .....................  .....................  See footnote,\3\ p.
                                                                                25; See footnote,\6\
                                                                                p. S51.
                                     GC-MS.................  625.1.................  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
7. Barban..........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
                                     GC/MS.................  625.1.................
8. [alpha]-BHC.....................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\8\
                                                                                3M0222.
                                     GC/MS.................  625.1 \5\.............  6410 B-2020..........  .....................  See footnote,\11\ O-
                                                                                1126-95.
9. [beta]-BHC......................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\8\
                                                                                96(02).                3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
10. [delta]-BHC....................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\8\
                                                                                96(02).                3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
11. [gamma]-BHC (Lindane)..........  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  625.1 \5\.............  6410 B-2020..........  .....................  See footnote,\11\ O-
                                                                                1126-95.
12. Captan.........................  GC....................  617, 608.3............  6630 B-2021..........  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7.
13. Carbaryl.......................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                94, See footnote,\6\
                                                                                p. S60.
                                     HPLC..................  531.1, 632............
                                     HPLC/MS...............  553...................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
                                     GC/MS.................  625.1.................  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
14. Carbophenothion................  GC....................  617, 608.3............  6630 B-2021..........  .....................  See footnote,\4\ page
                                                                                27; See footnote,\6\
                                                                                p. S73.
                                     GC/MS.................  625.1.................

15. Chlordane......................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
16. Chloropropham..................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
                                     GC/MS.................  625.1.................
17. 2,4-D..........................  GC....................  615...................  6640 B-2021..........  .....................  See footnote,\3\ p.
                                                                                115; See
                                                                                footnote,\4\ O-3105-
                                                                                83.
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
18. 4,4'-DDD.......................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3105-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
19. 4,4'-DDE.......................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........  .....................  See footnote,\11\ O-
                                                                                1126-95.
20. 4,4'-DDT.......................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
21. Demeton-O......................  GC....................  614, 622..............  .....................  .....................  See footnote,\3\ p.
                                                                                25; See footnote,\6\
                                                                                p. S51.
                                     GC/MS.................  625.1.................
22. Demeton-S......................  GC....................  614, 622..............  .....................  .....................  See footnote,\3\ p.
                                                                                25; See footnote,\6\
                                                                                p. S51.
                                     GC/MS.................  625.1.................
23. Diazinon.......................  GC....................  507, 614, 622, 1657...  .....................  .....................  See footnote,\3\ p.
                                                                                25; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\6\ p. S51.
                                     GC/MS.................  525.2, 625.1..........  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
24. Dicamba........................  GC....................  615...................  .....................  .....................  See footnote,\3\ p.
                                                                                115.
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
25. Dichlofenthion.................  GC....................  622.1.................  .....................  .....................  See footnote,\4\ page
                                                                                27; See footnote,\6\
                                                                                p. S73.
26. Dichloran......................  GC....................  608.2, 617, 608.3.....  6630 B-2021..........  .....................  See footnote,\3\ p.
                                                                                7.
27. Dicofol........................  GC....................  617, 608.3............  .....................  .....................  See footnote,\4\ O-
                                                                                3104-83.
28. Dieldrin.......................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........  .....................  See footnote,\11\ O-
                                                                                1126-95.
29. Dioxathion.....................  GC....................  614.1, 1657...........  .....................  .....................  See footnote,\4\ page
                                                                                27; See footnote,\6\
                                                                                p. S73.
30. Disulfoton.....................  GC....................  507, 614, 622, 1657...  .....................  .....................  See footnote,\3\ p.
                                                                                25; See footnote,\6\
                                                                                p. S51.
                                     GC/MS.................  525.2, 625.1..........  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
31. Diuron.........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.

                                     HPLC..................  632...................
                                     HPLC/MS...............  553...................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
32. Endosulfan I...................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M022).
                                     GC/MS.................  625.1 \5\.............  6410 B-2020..........  .....................  See footnote,\13\ O-
                                                                                2002-01.
33. Endosulfan II..................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\8\
                                                                                3M0222.
                                     GC/MS.................  625.1 \5\.............  6410 B-2020..........  .....................  See footnote,\13\ O-
                                                                                2002-01.
34. Endosulfan Sulfate.............  GC....................  617, 608.3............  6630 C-2021..........  .....................  See footnote,\8\
                                                                                3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
35. Endrin.........................  GC....................  505, 508, 617, 1656,    6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                              608.3.                                         96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  525.1, 525.2, 625.1     6410 B-2020..........
                                                              \5\.
36. Endrin aldehyde................  GC....................  617, 608.3............  6630 C-2021..........  .....................  See footnote,\8\
                                                                                3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
37. Ethion.........................  GC....................  614, 614.1, 1657......  .....................  .....................  See footnote,\4\ page
                                                                                27; See footnote,\6\
                                                                                p. S73.
                                     GC/MS.................  625.1.................  .....................  .....................  See footnote,\13\ O-
                                                                                2002-01.
38. Fenuron........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
39. Fenuron-TCA....................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
40. Heptachlor.....................  GC....................  505, 508, 617, 1656,    6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                              608.3.                                         96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  525.1, 525.2, 625.1...  6410 B-2020..........
41. Heptachlor epoxide.............  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\6\ p. S73;
                                                                                See footnote,\8\
                                                                                3M0222.
                                     GC/MS.................  625.1.................  6410 B-2020..........
42. Isodrin........................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  .....................  See footnote,\4\ O-
                                                                                3104-83; See
                                                                                footnote,\6\ p. S73.
                                     GC/MS.................  625.1.................
43. Linuron........................  GC....................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
                                     HPLC/MS...............  553...................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
                                     GC/MS.................  ......................  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
44. Malathion......................  GC....................  614, 1657.............  6630 B-2021..........  .....................  See footnote,\3\ p.
                                                                                25; See footnote,\6\
                                                                                p. S51.
                                     GC/MS.................  625.1.................  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
45. Methiocarb.....................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                94; See footnote,\6\
                                                                                p. S60.

                                     HPLC..................  632...................
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
46. Methoxychlor...................  GC....................  505, 508, 608.2, 617,   6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                              1656, 608.3.                                   96(02).                7; See footnote,\4\
                                                                                O-3104-83; See
                                                                                footnote,\8\ 3M0222.
                                     GC/MS.................  525.1, 525.2, 625.1...  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
47. Mexacarbate....................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                94; See footnote,\6\
                                                                                p. S60.
                                     HPLC..................  632...................
                                     GC/MS.................  625.1.................
48. Mirex..........................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7; See footnote,\4\
                                                                                O-3104-83.
                                     GC/MS.................  625.1.................
49. Monuron........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
50. Monuron-TCA....................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
51. Neburon........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
52. Parathion methyl...............  GC....................  614, 622, 1657........  6630 B-2021..........  .....................  See footnote,\4\ page
                                                                                27; See footnote,\3\
                                                                                p. 25.
                                     GC/MS.................  625.1.................  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
53. Parathion ethyl................  GC....................  614...................  6630 B-2021..........  .....................  See footnote,\4\ page
                                                                                27; See footnote,\3\
                                                                                p. 25.
                                     GC/MS.................  ......................  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
54. PCNB...........................  GC....................  608.1, 617, 608.3.....  6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                                                96(02).                7.
55. Perthane.......................  GC....................  617, 608.3............  .....................  D3086-90, D5812-       See footnote,\4\ O-
                                                                                96(02).                3104-83.
56. Prometon.......................  GC....................  507, 619..............  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\6\
                                                                                p. S68; See
                                                                                footnote,\9\ O-3106-
                                                                                93.
                                     GC/MS.................  525.2, 625.1..........  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
57. Prometryn......................  GC....................  507, 619..............  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\6\
                                                                                p. S68; See
                                                                                footnote,\9\ O-3106-
                                                                                93.
                                     GC/MS.................  525.1, 525.2, 625.1...  .....................  .....................  See footnote,\13\ O-
                                                                                2002-01.
58. Propazine......................  GC....................  507, 619, 1656, 608.3.  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\6\
                                                                                p. S68; See
                                                                                footnote,\9\ O-3106-
                                                                                93.
                                     GC/MS.................  525.1, 525.2, 625.1...
59. Propham........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.

60. Propoxur.......................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                94; See footnote,\6\
                                                                                p. S60.
                                     HPLC..................  632...................
61. Secbumeton.....................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\6\
                                                                                p. S68.
                                     GC....................  619...................
62. Siduron........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
                                     HPLC/MS...............  ......................  .....................  .....................  See footnote,\12\ O-
                                                                                2060-01.
63. Simazine.......................  GC....................  505, 507, 619, 1656,    .....................  .....................  See footnote,\3\ p.
                                                              608.3.                                                                83; See footnote,\6\
                                                                                p. S68; See
                                                                                footnote,\9\ O-3106-
                                                                                93.
                                     GC/MS.................  525.1, 525.2, 625.1...  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
64. Strobane.......................  GC....................  617, 608.3............  6630 B-2021 & C-2021.  .....................  See footnote,\3\ p.
                                                                                7.
65. Swep...........................  TLC...................  ......................  .....................  .....................  See footnote,\3\ p.
                                                                                104; See
                                                                                footnote,\6\ p. S64.
                                     HPLC..................  632...................
66. 2,4,5-T........................  GC....................  615...................  6640 B-2021..........  .....................  See footnote,\3\ p.
                                                                                115; See
                                                                                footnote,\4\ O-3105-
                                                                                83.
67. 2,4,5-TP (Silvex)..............  GC....................  615...................  6640 B-2021..........  .....................  See footnote,\3\ p.
                                                                                115; See
                                                                                footnote,\4\ O-3105-
                                                                                83.
68. Terbuthylazine.................  GC....................  619, 1656, 608.3......  .....................  .....................  See footnote,\3\ p.
                                                                                83; See footnote,\6\
                                                                                p. S68.
                                     GC/MS.................  ......................  .....................  .....................  See footnote,\13\ O-
                                                                                2002-01.
69. Toxaphene......................  GC....................  505, 508, 617, 1656,    6630 B-2021 & C-2021.  D3086-90, D5812-       See footnote,\3\ p.
                                                              608.3.                                         96(02).                7; See footnote; \8\
                                                                                See footnote,\4\ O-
                                                                                3105-83.
                                     GC/MS.................  525.1, 525.2, 625.1...  6410 B-2020..........
70. Trifluralin....................  GC....................  508, 617, 627, 1656,    6630 B-2021..........  .....................  See footnote,\3\ p.
                                                              608.3.                                                                7; See footnote,\9\
                                                                                O-3106-93.
                                     GC/MS.................  525.2, 625.1..........  .....................  .....................  See footnote,\11\ O-
                                                                                1126-95.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Table ID notes:
\1\ Pesticides are listed in this table by common name for the convenience of the reader. Additional pesticides may be found under Table IC of this
  section, where entries are listed by chemical name.
\2\ The standardized test procedure to be used to determine the method detection limit (MDL) for these test procedures is given at Appendix B,
  Definition and Procedure for the Determination of the Method Detection Limit, of this part.
\3\ Methods for Benzidine, Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater. September 1978. U.S. EPA. This EPA
  publication includes thin-layer chromatography (TLC) methods.
\4\ Methods for the Determination of Organic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the U.S.
  Geological Survey, Book 5, Chapter A3. 1987. USGS.
\5\ The method may be extended to include [alpha]-BHC, [gamma]-BHC, endosulfan I, endosulfan II, and endrin. However, when they are known to exist,
  Method 608 is the preferred method.
\6\ Selected Analytical Methods Approved and Cited by the United States Environmental Protection Agency, Supplement to the 15th Edition of Standard
  Methods for the Examination of Water and Wastewater.1981. American Public Health Association (APHA).
\7\ Each analyst must make an initial, one-time, demonstration of their ability to generate acceptable precision and accuracy with Methods 608.3 and
  625.1 in accordance with procedures given in Section 8.2 of each of these methods. Additionally, each laboratory, on an on-going basis, must spike and
  analyze 10% of all samples analyzed with Method 608.3 or 5% of all samples analyzed with Method 625.1 to monitor and evaluate laboratory data quality
  in accordance with Sections 8.3 and 8.4 of these methods. When the recovery of any parameter falls outside the warning limits, the analytical results
  for that parameter in the unspiked sample are suspect. The results should be reported, but cannot be used to demonstrate regulatory compliance. These
  quality control requirements also apply to the Standard Methods, ASTM Methods, and other methods cited.
\8\ Organochlorine Pesticides and PCBs in Wastewater Using Empore\TM\ Disk. Revised October 28, 1994. 3M Corporation.
\9\ Method O-3106-93 is in Open File Report 94-37, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of
  Triazine and Other Nitrogen-Containing Compounds by Gas Chromatography with Nitrogen Phosphorus Detectors. 1994. USGS.

\10\ EPA Methods 608.1, 608.2, 614, 614.1, 615, 617, 619, 622, 622.1, 627, and 632 are found in Methods for the Determination of Nonconventional
  Pesticides in Municipal and Industrial Wastewater, EPA 821-R-92-002, April 1992, U.S. EPA. EPA Methods 505, 507, 508, 525.1, 531.1 and 553 are in
  Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial Wastewater, Volume II, EPA 821-R-93-010B, 1993, U.S. EPA. EPA
  Method 525.2 is in Determination of Organic Compounds in Drinking Water by Liquid-Solid Extraction and Capillary Column Gas Chromatography/Mass
  Spectrometry, Revision 2.0, 1995, U.S. EPA. EPA methods 1656 and 1657 are in Methods for The Determination of Nonconventional Pesticides In Municipal
  and Industrial Wastewater, Volume I, EPA 821-R-93-010A, 1993, U.S. EPA. Methods 608.3 and 625.1 are available at: cwa-methods/approved-cwa-test-
  methods-organic-compounds.
\11\ Method O-1126-95 is in Open-File Report 95-181, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination
  of pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring. 1995.
  USGS.
\12\ Method O-2060-01 is in Water-Resources Investigations Report 01-4134, Methods of Analysis by the U.S. Geological Survey National Water Quality
  Laboratory--Determination of Pesticides in Water by Graphitized Carbon-Based Solid-Phase Extraction and High-Performance Liquid Chromatography/Mass
  Spectrometry. 2001. USGS.
\13\ Method O-2002-01 is in Water-Resources Investigations Report 01-4098, Methods of Analysis by the U.S. Geological Survey National Water Quality
  Laboratory--Determination of moderate-use pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass
  spectrometry. 2001. USGS.
\14\ Method O-1121-91 is in Open-File Report 91-519, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination
  of organonitrogen herbicides in water by solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion
  monitoring. 1992. USGS.
\15\ Please refer to the following applicable Quality Control Section: Part 6000 Methods, Individual Organic Compounds 6020 (2019). These Quality
  Control Standards are available for download at www.standardmethods.org at no charge.

* * * * *
* * * * *

                                          Table IH--List of Approved Microbiological Methods for Ambient Water
--------------------------------------------------------------------------------------------------------------------------------------------------------
        Parameter and units                Method \1\                 EPA              Standard methods       AOAC, ASTM, USGS             Other
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Bacteria
--------------------------------------------------------------------------------------------------------------------------------------------------------
1. Coliform (fecal), number per 100  Most Probable Number    p. 132 \3\...........  9221 E-2014, 9221 F-
 mL.                                  (MPN), 5 tube, 3                               2014 \32\.
                                      dilution, or
                                     Membrane filter         p. 124 \3\...........  9222 D-2015 \26\.....  B-0050-85. \4\
                                      (MF),\2\ single step.
2. Coliform (total), number per 100  MPN, 5 tube, 3          p. 114 \3\...........  9221 B-2014..........
 mL.                                  dilution, or.
                                     MF,\2\ single step or   p. 108 \3\...........  9222 B-2015 \27\       B-0025-85. \4\
                                      two step.
                                     MF \2\ with enrichment  p. 111 \3\...........  9222 B.-2015. \27\
3. E. coli, number per 100 mL......  MPN,\5\ \7\ \13\        .....................  9221 B.3-2014/9221 F-
                                      multiple tube, or                              2014. \10\ \12\ \32\
                                     Multiple tube/multiple  .....................  9223 B-2016 \11\.....  991.15 \9\............  Colilert[supreg],\11\
                                      well, or.                                                                                \15\ Colilert-
                                                                                18[supreg].\11\ \14\
                                                                                \15\
                                     MF,\2\ \5\ \6\ \7\ two  1103.2 \18\..........  9222 B-2015/9222 I-    D5392-93. \8\
                                      step, or.                                      2015,\17\ 9213 D-
                                                                                2007.
                                     Single step...........  1603.1,\19\ 1604 \20\  .....................  ......................  m-
                                                                                ColiBlue24[supreg],\
                                                                                16\ KwikCount\TM\ EC
                                                                                \28\ \ 29\
4. Fecal streptococci, number per    MPN, 5 tube, 3          p. 139 \3\...........  9230 B-2013..........
 100 mL.                              dilution, or.
                                     MF,\2\ or.............  p. 136 \3\             9230 C-2013 \30\.....  B-0055-85. \4\
                                     Plate count...........  p. 143. \3\
5. Enterococci, number per 100 mL..  MPN,\5\ \7\ multiple    .....................  9230 D-2013..........  D6503-99 \8\..........  Enterolert[supreg]
                                      tube/multiple well,                                                                           \11\ \21\
                                      or
                                     MF \2\ \5\ \6\ \7\ two  1106.2 \22\..........  9230 C-2013 \30\.....  D5259-92. \8\
                                      step, or.
                                     Single step, or.......  1600.1 \23\..........  9230 C-2013. \30\
                                     Plate count...........  p. 143. \3\
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Protozoa
--------------------------------------------------------------------------------------------------------------------------------------------------------
6. Cryptosporidium.................  Filtration/IMS/FA.....  1622, \24\ 1623, \25\
                                                              1623.1. \25\ \31\
7. Giardia.........................  Filtration/IMS/FA.....  1623, \25\ 1623.1.
                                                              \25\ \31\
--------------------------------------------------------------------------------------------------------------------------------------------------------
Table 1H notes:
\1\ The method must be specified when results are reported.
\2\ A 0.45-[micro]m membrane filter (MF) or other pore size certified by the manufacturer to fully retain organisms to be cultivated and to be free of
  extractables which could interfere with their growth.
\3\ Microbiological Methods for Monitoring the Environment, Water and Wastes. EPA/600/8-78/017. 1978. US EPA.
\4\ U.S. Geological Survey Techniques of Water-Resource Investigations, Book 5, Laboratory Analysis, Chapter A4, Methods for Collection and Analysis of
  Aquatic Biological and Microbiological Samples. 1989. USGS.
\5\ Tests must be conducted to provide organism enumeration (density). Select the appropriate configuration of tubes/filtrations and dilutions/volumes
  to account for the quality, character, consistency, and anticipated organism density of the water sample.
\6\ When the MF method has not been used previously to test waters with high turbidity, large numbers of noncoliform bacteria, or samples that may
  contain organisms stressed by chlorine, a parallel test should be conducted with a multiple-tube technique to demonstrate applicability and
  comparability of results.
\7\ To assess the comparability of results obtained with individual methods, it is suggested that side-by-side tests be conducted across seasons of the
  year with the water samples routinely tested in accordance with the most current Standard Methods for the Examination of Water and Wastewater or EPA
  alternate test procedure (ATP) guidelines.
\8\ Annual Book of ASTM Standards--Water and Environmental Technology. Section 11.02. 2000, 1999, 1996. ASTM International.
\9\ Official Methods of Analysis of AOAC International, 16th Edition, Volume I, Chapter 17. 1995. AOAC International.
\10\ The multiple-tube fermentation test is used in 9221B.3-2014. Lactose broth may be used in lieu of lauryl tryptose broth (LTB), if at least 25
  parallel tests are conducted between this broth and LTB using the water samples normally tested, and this comparison demonstrates that the false-
  positive rate and false-negative rate for total coliform using lactose broth is less than 10 percent. No requirement exists to run the completed phase
  on 10 percent of all total coliform-positive tubes on a seasonal basis.
\11\ These tests are collectively known as defined enzyme substrate tests.

\12\ After prior enrichment in a presumptive medium for total coliform using 9221B.3-2014, all presumptive tubes or bottles showing any amount of gas,
  growth or acidity within 48 h  3 h of incubation shall be submitted to 9221F-2014. Commercially available EC-MUG media or EC media
  supplemented in the laboratory with 50 [micro]g/mL of MUG may be used.
\13\ Samples shall be enumerated by the multiple-tube or multiple-well procedure. Using multiple-tube procedures, employ an appropriate tube and
  dilution configuration of the sample as needed and report the Most Probable Number (MPN). Samples tested with Colilert[supreg] may be enumerated with
  the multiple-well procedures, Quanti-Tray[supreg] or Quanti-Tray[supreg]/2000, and the MPN calculated from the table provided by the manufacturer.
\14\ Colilert-18[supreg] is an optimized formulation of the Colilert[supreg] for the determination of total coliforms and E. coli that provides results
  within 18 h of incubation at 35 [deg]C, rather than the 24 h required for the Colilert[supreg] test and is recommended for marine water samples.
\15\ Descriptions of the Colilert[supreg], Colilert-18[supreg], Quanti-Tray[supreg], and Quanti-Tray[supreg]/2000 may be obtained from IDEXX
  Laboratories Inc.
\16\ A description of the mColiBlue24[supreg] test may be obtained from Hach Company.
\17\ Subject coliform positive samples determined by 9222B-2015 or other membrane filter procedure to 9222I-2015 using NA-MUG media.
\18\ Method 1103.2: Escherichia coli (E. coli) in Water by Membrane Filtration Using membrane-Thermotolerant Escherichia coli Agar (mTEC), [in draft as
  of 2023]. US EPA.
\19\ Method 1603.1: Escherichia coli (E. coli) in Water by Membrane Filtration Using Modified membrane-Thermotolerant Escherichia coli Agar (Modified
  mTEC), [in draft as of 2023]. US EPA.
\20\ Method 1604: Total Coliforms and Escherichia coli (E. coli) in Water by Membrane Filtration by Using a Simultaneous Detection Technique (MI
  Medium), EPA 821-R-02-024. September 2002. US EPA.
\21\ A description of the Enterolert[supreg] test may be obtained from IDEXX Laboratories Inc.
\22\ Method 1106.2: Enterococci in Water by Membrane Filtration Using membrane-Enterococcus-Esculin Iron Agar (mE-EIA), [in draft as of 2023]. US EPA.
\23\ Method 1600.1: Enterococci in Water by Membrane Filtration Using membrane-Enterococcus Indoxyl-[beta]-D-Glucoside Agar (mEI), [in draft as of
  2023]. US EPA.
\24\ Method 1622 uses a filtration, concentration, immunomagnetic separation of oocysts from captured material, immunofluorescence assay to determine
  concentrations, and confirmation through vital dye staining and differential interference contrast microscopy for the detection of Cryptosporidium.
  Method 1622: Cryptosporidium in Water by Filtration/IMS/FA, EPA-821-R-05-001. December 2005. US EPA.
\25\ Methods 1623 and 1623.1 use a filtration, concentration, immunomagnetic separation of oocysts and cysts from captured material, immunofluorescence
  assay to determine concentrations, and confirmation through vital dye staining and differential interference contrast microscopy for the simultaneous
  detection of Cryptosporidium and Giardia oocysts and cysts. Method 1623: Cryptosporidium and Giardia in Water by Filtration/IMS/FA. EPA-821-R-05-002.
  December 2005. US EPA. Method 1623.1: Cryptosporidium and Giardia in Water by Filtration/IMS/FA. EPA 816-R-12-001. January 2012. US EPA.
\26\ On a monthly basis, at least ten blue colonies from positive samples must be verified using Lauryl Tryptose Broth and EC broth, followed by count
  adjustment based on these results; and representative non-blue colonies should be verified using Lauryl Tryptose Broth. Where possible, verifications
  should be done from randomized sample sources.
\27\ On a monthly basis, at least ten sheen colonies from positive samples must be verified using Lauryl Tryptose Broth and brilliant green lactose bile
  broth, followed by count adjustment based on these results; and representative non-sheen colonies should be verified using Lauryl Tryptose Broth.
  Where possible, verifications should be done from randomized sample sources.
\28\ A description of KwikCount\TM\ EC may be obtained from Micrology Laboratories LLC.
\29\ Approved for the analyses of E. coli in freshwater only.
\30\ Verification of colonies by incubation of BHI agar at 10  0.5 [deg]C for 48  3 h is optional. As per the Errata to the 23rd
  Edition of Standard Methods for the Examination of Water and Wastewater ``Growth on a BHI agar plate incubated at 10  0.5 [deg]C for 48
   3 h is further verification that the colony belongs to the genus Enterococcus.''
\31\ Method 1623.1 includes updated acceptance criteria for IPR, OPR, and MS/MSD and clarifications and revisions based on the use of Method 1623 for
  years and technical support questions.
\32\ 9221 F.2-2014 allows for simultaneous detection of E. coli and thermotolerant fecal coliforms by adding inverted vials to EC-MUG; the inverted
  vials collect gas produced by thermotolerant fecal coliforms.

    (b) The material listed in this paragraph (b) is incorporated by
reference into this section with the approval of the Director of the
Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. All approved
material is available for inspection at the EPA and at the National
Archives and Records Administration (NARA). Contact the EPA at: EPA's
Water Docket, EPA West, 1301 Constitution Avenue NW, Room 3334,
Washington, DC 20004; telephone:<PHONE_NUMBER>; email: [email protected]. For information on the availability of this
material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations.html or email [email protected]. The material may be
obtained from the following sources in this paragraph (b).
* * * * *
    (8) * * *
    (ii) Method 1103.2: Escherichia coli (E. coli) in Water by Membrane
Filtration Using Modified membrane-Thermotolerant Escherichia coli Agar
(Modified mTEC). [in draft as of 2023]. EPA Table IH, Note 18.
    (iii) Method 1106.2: Enterococci in Water by Membrane Filtration
Using membrane-Enterococcus-Esculin Iron Agar (mE-EIA). [in draft as of
2023]. Table IH, Note 22.
    (iv) Method 1600.1: Enterococci in Water by Membrane Filtration
Using membrane-Enterococcus Indoxyl-[beta]-D-Glucoside Agar (mEI). [in
draft as of 2023]. EPA. Table 1A, Note 24; Table IH, Note 23.
    (v) Method 1603.1: Escherichia coli (E. coli) in Water by Membrane
Filtration Using Modified membrane-Thermotolerant Escherichia coli Agar
(Modified mTEC). [in draft as of 2023]. EPA. Table IA, Note 21; Table
IH, Note 19.
* * * * *
    (10) * * *
    (i) Standard Methods for the Examination of Water and Wastewater.
14th Edition, 1975. Table IB, Notes 27 and 86.
* * * * *
    (viii) 2120, Color. 2021. Table IB.
    (ix) 2130, Turbidity. 2020. Table IB.
    (x) 2310, Acidity. 2020. Table IB.
    (xi) 2320, Alkalinity. 2021. Table IB.
    (xii) 2340, Hardness. 2021. Table IB.
    (xiii) 2510, Conductivity. 2021. Table IB.
    (xiv) 2540, Solids. 2020. Table IB.
* * * * *
    (xvi) 3111, Metals by Flame Atomic Absorption Spectrometry. 2019.
Table IB.
    (xvii) 3112, Metals by Cold-Vapor Atomic Absorption Spectrometry.
2020. Table IB.
    (xviii) 3113, Metals by Electrothermal Atomic Absorption
Spectrometry. 2020. Table IB.
    (xix) 3114, Arsenic and Selenium by Hydride Generation/Atomic
Absorption Spectrometry. 2020, Table IB.
    (xx) 3120, Metals by Plasma Emission Spectroscopy. 2020. Table IB.
    (xxi) 3125, Metals by Inductively Coupled Plasma-Mass Spectrometry.
2020. Table IB.
    (xxii) 3500-Al, Aluminum. 2020. Table IB.
    (xxiii) 3500-As, Arsenic. 2020. Table IB.
    (xxiv) 3500-Ca, Calcium. 2020. Table IB.
    (xxv) 3500-Cr, Chromium. 2020. Table IB.
    (xxvi) 3500-Cu, Copper. 2020. Table IB.
* * * * *
    (xxviii) 3500-Pb, Lead. 2020. Table IB.
    (xxix) 3500-Mn, Manganese. 2020. Table IB.
    (xxx) 3500-K, Potassium. 2020. Table IB.
    (xxxi) 3500-Na, Sodium. 2020. Table IB.
* * * * *
    (xxxiii) 3500-Zn, Zinc. 2020. Table IB.
    (xxxiv) 4110, Determination of Anions by Ion Chromatography. 2020.
Table IB.
    (xxxv) 4140, Inorganic Anions by Capillary Ion Electrophoresis.
2020. Table IB.
* * * * *

    (xxxvii) 4500 Cl-, Chloride. 2021. Table IB.
* * * * *
    (xxxix) 4500-CN-, Cyanide. 2021. Table IB.
    (xl) 4500-F-, Fluoride. 2021. Table IB.
    (xli) 4500-H\+\, pH Value. 2021. Table IB.
    (xlii) 4500-NH3, Nitrogen (Ammonia). 2021. Table IB.
    (xliii) 4500-NO2-, Nitrogen (Nitrite). 2021.
Table IB.
    (xliv) 4500-NO3-, Nitrogen (Nitrate). 2019.
Table IB.
    (xlv) 4500-N(org), Nitrogen (Organic). 2021. Table IB.
    (xlvi) 4500-O, Oxygen (Dissolved). 2021. Table IB.
    (xlvii) 4500-P, Phosphorus. 2021. Table IB.
    (xlviii) 4500-SiO2, Silica. 2021. Table IB.
    (xlix) 4500-S2-, Sulfide. 2021. Table IB.
    (l) 4500-SO32-, Sulfite. 2021. Table IB.
    (li) 4500-SO42-, Sulfate. 2021. Table IB.
* * * * *
    (lv) 5520, Oil and Grease. 2021. Table IB.
    (lvi) 5530, Phenols. 2021. Table IB.
    (lvii) 5540, Surfactants. 2021. Table IB.
    (lviii) 6200, Volatile Organic Compounds. 2020. Table IC.
    (lix) 6410, Extractable Base/Neutrals and Acids. 2020. Tables IC
and ID.
    (lx) 6420, Phenols. 2020. Table IC.
    (lxi) 6440, Polynuclear Aromatic Hydrocarbons. 2021. Table IC.
    (lxii) 6630, Organochlorine Pesticides. 2021. Table IC.
    (lxiii) 6640, Acidic Herbicide Compounds. 2021. Table IC.
* * * * *
    (lxvii) 9221, Multiple-Tube Fermentation Techniques for Members of
the Coliform Group. 2014. Table IA, Notes 12, 14 and 33; Table IH,
Notes 10, 12 and 32.
* * * * *
    (15) * * *
    (xi) ASTM D888-18, Standard Test Methods for Dissolved Oxygen in
Water. May 2018. Table IB.
* * * * *
    (xx) ASTM D1293-18, Standard Test Methods for pH of Water. January
2018. Table IB.
* * * * *
    (xxx) ASTM D1976-20, Standard Test Method for Elements in Water by
Inductively-Coupled Argon Plasma Atomic Emission Spectroscopy. June
2020. Table IB.
* * * * *
    (xxxii) ASTM D2330-20, Standard Test Method for Methylene Blue
Active Substances. February 2020. Table 1B.
* * * * *
    (lix) ASTM D5907-18, Standard Test Methods for Filterable Matter
(Total Dissolved Solids) and Nonfilterable Matter (Total Suspended
Solids) in Water. May 2018. Table IB.
* * * * *
    (lxv) ASTM D7237-18, Standard Test Method for Free Cyanide with
Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and
Amperometric Detection. January 2019. Table IB.
    (lxvi) ASTM D7284-20, Standard Test Method for Total Cyanide in
Water by Micro Distillation followed by Flow Injection Analysis with
Gas Diffusion Separation and Amperometric Detection. August 2020. Table
IB.
    (lxvii) ASTM D7365-09a (Reapproved 2015), Standard Practice for
Sampling, Preservation and Mitigating Interferences in Water Samples
for Analysis of Cyanide. August 2015. Table II, Notes 5 and 6.
* * * * *
    (lxix) ASTM D7573-18a\e1\, Standard Test Method for Total Carbon
and Organic Carbon in Water by High Temperature Catalytic Combustion
and Infrared Detection, January 2019. Table IB.
* * * * *
    (33) Pace Analytical Services, LLC, 1800 Elm Street SE,
Minneapolis, MN 55414. Telephone:<PHONE_NUMBER>.
    (i) PAM-16130-SSI, Determination of 2,3,7,8-Substituted Tetra-
through Octa-Chlorinated Dibenzo-p-Dioxins and Dibenzofurans (CDDs/
CDFs) Using Shimadzu Gas Chromatography Mass Spectrometry (GC-MS/MS),
Revision 1.1, May 20, 2022. Table IC, Note 17.
    (ii) [Reserved]
    (34) SGS AXYS Analytical Services, Ltd., 2045 Mills Road, Sidney,
British Columbia, Canada, V8L 5X2. Telephone: 1-888-373-0881.
    (i) ATM 16130, Determination of 2,3,7,8-Substituted Tetra- through
Octa-Chlorinated Dibenzo-p-Dioxins and Dibenzofurans (CDDs/CDFs) Using
Waters and Agilent Gas Chromatography-Tandem-Mass Spectrometry (GC/MS/
MS)., Revision 1.0, August 2020. Table IC, Note 16
    (ii) [Reserved]
* * * * *
    (e) * * *

   Table II--Required Containers, Preservation Techniques, and Holding
                                  Times
------------------------------------------------------------------------

-------------------------------------------------------------------------

                              * * * * * * *
------------------------------------------------------------------------
 * * * * * * *
\5\ ASTM D7365-09a (15) specifies treatment options for samples
  containing oxidants (e.g., chlorine) for cyanide analyses. Also,
  Section 9060A of Standard Methods for the Examination of Water and
  Wastewater (23rd edition) addresses dechlorination procedures for
  microbiological analyses.

* * * * *
[FR Doc. 2023-02391 Filed 2-17-23; 8:45 am]
BILLING CODE 6560-50-P