TRICHLOROFLUOROMETHANE

16

1,4-DICHLOROBENZENE

16

ACID, NOS

15

DI-N-BUTYL PHTHALATE

15

DICHLOROBENZENE, NOS

15

METHYL ISOBUTYL KETONE

15

M-XYLENE

14

1,2-DICHLOROBENZENE

14

ALUMINUM AND COMPOUNDS, NOS (AL)

14

CHLOROMETHANE

14

AMMONIA

13

TETRAHYDROFURAN

12

THORIUM AND COMPOUNDS, NOS (TH)

12

HEXACHLOROBENZENE

12

HEPTACHLOR

11

TOXAPHENE

11

TRIBROMOMETHANE

11

1,2-DICHLOROPROPANE

11

RDX (CYCLOTRIMETHYLENETRINITRAMINE)

10

ANTIMONY AND COMPOUNDS, NOS (SB)

10

BARIUM AND COMPOUNDS, NOS (BA)

10

BERYLLIUM AND COMPOUNDS, NOS (BE)

10

* This list is a frequency of substances documented during HRS score preparation, not a complete inventory of substances at all sites.

“NOS”—Not otherwise specified, e.g., not identified as to specific isomer or congener.

APPENDIX 3-B ATSDR Priority List of Substances for Toxicological Profiles (Listed in Federal Register 52(74), Friday April 17, 1987, p. 12869)

CAS No.

Substance Name

Priority Group 1

50328

Benzo(a)pyrene

53703

Dibenzo(a,h)anthracene

56553

Benzo(a)anthracene

57125

Cyanide

60571

Dieldrin/aldrin

67663

Chloroform

71432

Benzene

75014

Vinyl chloride

75092

Methylene chloride

76448

Heptachlor/heptachlor epoxide

79016

Trichloroethene



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