D Groundwater Cleanup Objectives (GWobj)

Section 259 Section 259.APPENDIX D   Groundwater Cleanup Objectives (GW obj ) Name CAS No. a Recommended Test  Method b Subsurface (mg/L) c Surface (mg/L) d acetochlor 34256-82-1 505 0.002 j 0.01 g acifluorfen sodium 62476-59-9 515.1 0.091 f 0.455 g alachlor 15972-60-8 505 0.002 0.01 aldicarb 116-06-3 531.1 0.003 0.015 aldrin 309-00-2 508 0.000005 e 0.000025 e ammonia 7664-41-7 350.2 10.0 o 50.0 o atrazine 1912-24-9 505 0.003 0.015 bentazon sodium 50723-80-3 515.1 0.21 f 1.05 g bromacil 314-40-9 507 0.7 f 3.5 g bromoxynil(o) 1689-99-2 0.14 f 0.7 g butylate 2008-41-5 507 0.35 f 1.75 g carbofuran 1563-66-2 531.1 0.04 0.2 chlordane 57-74-9 508 0.002 0.01 chlorimuron-ethyl 90982-32-4 0.14 f 0.7 g chlorpyrifos 2921-88-2 525.2 0.021 f 0.105 g cyanazine 21725-46-2 508.1 0.014 l 0.07 g 2,4-D 94-75-7 515.1 0.07 0.35 4,4'-DDD 72-54-8 508 0.0004 e 0.002 e 4,4'-DDE 72-55-9 508 0.0003 e 0.0015 e 4,4'-DDT 50-29-3 508 0.0003 e 0.0015 e diazinon 333-41-5 507 0.00063 l 0.00315 g dicamba 1918-00-9 515.1 0.21 f 1.05 g dieldrin 60-57-1 508 0.000005 e 0.000025 e dimethoate 60-51-5 8141 h 0.0014 f 0.007 g dinoseb 88-85-7 515.1 0.007 0.07 disulfoton 298-04-4 507 0.00028 f 0.0014 g endosulfan 115-29-7 508 0.2 e 1.0 e endothall 145-73-3 548.1 0.1 0.1 endrin 72-20-8 508 0.002 0.01 EPTC 759-94-4 507 0.175 f 0.875 g glyphosate 1071-83-6 0.7 k 3.5 g HCH-alpha 319-84-6 508 0.00001 e 0.00005 e 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 0.014 f 0.07 g malathion 121-75-5 0.14 f 0.7 g methoxychlor 72-43-5 508 0.04 0.2 metolachlor 51218-45-2 507 1.05 f 5.25 g metribuzin 21087-64-9 507 0.175 m 0.875 g nitrate, as N 7631-99-4 300.0 10.0 c 100.0 d parathion, ethyl 56-38-2 8141 h 0.042 f 0.21 g parathion, methyl 298-00-0 8141 h 0.00175 f 0.00875 g pendimethalin 40487-42-1 0.28 f 1.4 g permethrin 52645-53-1 0.35 f 1.75 g phorate 298-02-2 8141 h 0.0014 i 0.007 g 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 0.00175 i 0.00875 g toxaphene 8001-35-2 508 0.003 0.015 trifluralin 1582-09-8 508 0.0525 f 0.2625 g 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 GW obj values based on Class I GW obj values 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.