40 CFR § 372.28 - Lower thresholds for chemicals of special concern.

(a) Notwithstanding § 372.25 or § 372.27, for the toxic chemicals set forth in this section, the threshold amounts for manufacturing (including importing), processing, and otherwise using such toxic chemicals are as set forth in this section.

(1) Chemical listing in alphabetic order.

Table 1 to Paragraph (a)(1)

Chemical name	CAS No.	Reporting threshold (in pounds)
Aldrin	00309-00-2	100
Benzo(g,h,i)perylene	00191-24-2	10
Chlordane	00057-74-9	10
Heptachlor	00076-44-8	10
Hexachlorobenzene	00118-74-1	10
1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta[g]-2-benzopyran	1222-05-5	100
Isodrin	00465-73-6	10
Lead (this lower threshold does not apply to lead when contained in a stainless steel, brass or bronze alloy)	7439-92-1	100
Mercury	07439-97-6	10
Methoxychlor	00072-43-5	100
Octachlorostyrene	29082-74-4	10
Pendimethalin	40487-42-1	100
Pentachlorobenzene	00608-93-5	10
Per- and polyfluoroalkyl substances (Individually listed per- and polyfluoroalkyl substances added by 15 U.S.C. 8921(b)(1) and (c)(1)). (EPA periodically updates the lists of covered chemicals at § 372.65(d) and (e) to reflect chemicals that have been added by 15 U.S.C. 8921)	see § 372.65(d) and (e)	100
Polychlorinated biphenyl (PCBs)	01336-36-3	10
Tetrabromobisphenol A	00079-94-7	100
Toxaphene	08001-35-2	10
Trifluralin	01582-09-8	100

(2) Chemical categories in alphabetic order.

Table 2 to Paragraph (a)(2)

Category name	Reporting threshold (in pounds unless otherwise noted)
Dioxin and dioxin-like compounds (Manufacturing; and the processing or otherwise use of dioxin and dioxin-like compounds if the dioxin and dioxin-like compounds are present as contaminants in a chemical and if they were created during the manufacturing of that chemical) (see § 372.65(c) for a list of chemicals covered by this category)	0.1 grams.
Hexabromocyclododecane (see § 372.65(c) for a list of chemicals covered by this category)	100
Lead Compounds	100
Mercury compounds	10
Polycyclic aromatic compounds (PACs) (see § 372.65(c) for a list of chemicals covered by this category)	100

(b) The threshold determination provisions under § 372.25(c) through (h) and the exemptions under § 372.38(b) through (h) are applicable to the toxic chemicals listed in paragraph (a) of this section.

[64 FR 58750, Oct. 29, 1999, as amended at 66 FR 4527, Jan. 17, 2001; 75 FR 72733, Nov. 26, 2010; 81 FR 85444, Nov. 28, 2016; 85 FR 42314, July 14, 2020; 87 FR 73486, Nov. 30, 2022; 88 FR 74368, Oct. 31, 2023]