Statutes, codes, and regulations
Illinois Administrative Code
Title 8 - AGRICULTURE AND ANIMALSPart 259 - AGRICHEMICAL FACILITY RESPONSE ACTION PROGRAM
Subpart E - NOTICE OF CLOSURE AND RECORDING REQUIREMENTS
Appendix D - Groundwater Cleanup Objectives (GWobj)

Ill. Admin. Code tit. 8, pt. 259, subpt. E, app D

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Current through Register Vol. 49, No. 2, January 10, 2025
Appendix D - Groundwater Cleanup Objectives (GWobj)

Name

CAS No.a

Recommended Test Methodb

Subsurface

(mg/L)c

Surface

(mg/L)d

acetochlor

34256-82-1

505

0.002j

0.01g

acifluorfen sodium

62476-59-9

515.1

0.091f

0.455g

alachlor

15972-60-8

505

0.002

0.01

aldicarb

116-06-3

531.1

0.003

0.015

aldrin

309-00-2

508

0.000005e

0.000025e

ammonia

7664-41-7

350.2

10.0o

50.0o

atrazine

1912-24-9

505

0.003

0.015

bentazon sodium

50723-80-3

515.1

0.21f

1.05g

bromacil

314-40-9

507

0.7f

3.5g

bromoxynil(o)

1689-99-2

0.14f

0.7g

butylate

2008-41-5

507

0.35f

1.75g

carbofuran

1563-66-2

531.1

0.04

0.2

chlordane

57-74-9

508

0.002

0.01

chlorimuron-ethyl

90982-32-4

0.14f

0.7g

chlorpyrifos

2921-88-2

525.2

0.021f

0.105g

cyanazine

21725-46-2

508.1

0.014l

0.07g

2,4-D

94-75-7

515.1

0.07

0.35

4,4'-DDD

72-54-8

508

0.0004e

0.002e

4,4'-DDE

72-55-9

508

0.0003e

0.0015e

4,4'-DDT

50-29-3

508

0.0003e

0.0015e

diazinon

333-41-5

507

0.00063l

0.00315g

dicamba

1918-00-9

515.1

0.21f

1.05g

dieldrin

60-57-1

508

0.000005e

0.000025e

dimethoate

60-51-5

8141h

0.0014f

0.007g

dinoseb

88-85-7

515.1

0.007

0.07

disulfoton

298-04-4

507

0.00028f

0.0014g

endosulfan

115-29-7

508

0.2e

1.0e

endothall

145-73-3

548.1

0.1

0.1

endrin

72-20-8

508

0.002

0.01

EPTC

759-94-4

507

0.175f

0.875g

glyphosate

1071-83-6

0.7k

3.5g

HCH-alpha

319-84-6

508

0.00001e

0.00005e

heptachlor

76-44-8

505

0.0004

0.002

heptachlor epoxide

1024-57-3

505

0.0002

0.001

lindane

58-89-9

508

0.0002

0.001

linuron

330-55-2

508

0.014f

0.07g

malathion

121-75-5

0.14f

0.7g

methoxychlor

72-43-5

508

0.04

0.2

metolachlor

51218-45-2

507

1.05f

5.25g

metribuzin

21087-64-9

507

0.175m

0.875g

nitrate, as N

7631-99-4

300.0

10.0c

100.0d

parathion, ethyl

56-38-2

8141h

0.042f

0.21g

parathion, methyl

298-00-0

8141h

0.00175f

0.00875g

pendimethalin

40487-42-1

0.28f

1.4g

permethrin

52645-53-1

0.35f

1.75g

phorate

298-02-2

8141h

0.0014i

0.007g

simazine

122-34-9

505

0.004

0.04

2,4,5-TP

93-72-1

515.1

0.05

0.25

terbufos

13071-79-9

507

0.00175i

0.00875g

toxaphene

8001-35-2

508

0.003

0.015

trifluralin

1582-09-8

508

0.0525f

0.2625g

Notes:

a Chemical Abstract Service (CAS)

b USEPA "Methods for the Determination of Organic Compounds in Drinking Water" Supplement III of 1995

c Groundwater Quality Standards for Class I: Potable Resource Groundwater (35 Ill. Adm. Code 620.410 )

d Groundwater Quality Standards for Class II: General Resource Groundwater (35 Ill. Adm. Code 620.420 )

e Tiered Approach to Corrective Action Objectives (TACO): Values Used to Calculate the Tier I Soil Remediation Objectives for the Migration to Groundwater Portion of the Groundwater Ingestion Route (35 Ill. Adm. Code 742.Appendix B:Table F)

f Human Threshold Toxicant Advisory Concentration (HTTAC) from "Procedures for Determining Human Threshold Toxicant Advisory Concentration for Class I: Potable Resource Groundwater" (35 Ill. Adm. Code 620.Appendix A) using values from Integrated Risk Information System (IRIS), USEPA

g Class II GWobj values based on Class I GWobjvalues times 5

h USEPA "Test Methods for Evaluating Solid Wastes, Physical/Chemical Methods (SW-846)", July 1992

i HTTAC using values from Health Effects Assessment Summary Tables (HEAST), 1997, USEPA

j Value from the Acetochlor Registration Agreement monitoring program, http://www.epa.gov/oppefed1/aceto/index.htm

k MCL value from Drinking Water Standards and Health Advisories (Summer 2000, EPA 822-B-00-001)

l HTTAC using RfD value from Drinking Water Standards and Health Advisories (Summer 2000, EPA 822-B-00-001)

m HTTAC using RfD value from Risk Assessment Information System (RAIS), http://risk.lsd.ornl.gov/rap_hp.shtml

n In order to provide environmentally conservative default SCOs that take into account the potential for long-term nitrification, one-third of the USEPA's Lifetime Health Advisory Level for ammonia in drinking water (30 mg/L) is used as basis for the groundwater cleanup objectives for Class I and Class II groundwater (U.S. Environmental Protection Agency, 2004, 2004 Edition of the Drinking Water Standards and Health Advisories, Office of Water, Washington, D.C., EPA 822-R-04-005). Although the Lifetime Health Advisory Level was established for ammonia, most of the dissolved ammonia occurs as ammonium within the pH range (5.6 -9.0) of Illinois groundwater.

Ill. Admin. Code tit. 8, pt. 259, subpt. E, app D

Amended at 32 Ill. Reg. 1308, effective January 21, 2008