ILLINOIS ENVIRONMENTAL PROTECTION AGENCY 1021 NORTH GRAND AVENUE EAST, P.O. Box 19276, SPRINGFIELD, ILLINOIS 62794-9276 - (217) 782-3397 PAT QUINN, GOVERNOR JOHN J. KIM, INTERIM DIRECTOR 217/785-0561 July 6, 2012 CERTIFIED MAIL 7010 2780 0002 1163 6974 RETURN RECEIPT REQUESTED Mr. Rick Diericx, Sr. Director, Environmental Compliance Dynegy Operating Company 604 Pierce Boulevard O?Fallon, IL 62269 Re: Violation Notice: Dynegy Midwest Generation Vermilion Power Station Identification No.: 6293 Violation Notice No.: W-2012-0007l Dear Mr. Diericx: This constitutes a Violation Notice pursuant to Section 31(a)(l) of the Illinois Environmental Protection Act (Act), 415 ILCS 5/3 and is based upon a review of available information and an investigation by representatives of the Illinois Environmental Protection Agency (?Illinois The Illinois EPA hereby provides notice of alleged violations of environmental laws, regulations, or permits as set forth in Attachment A to this notice. Attachment A includes an explanation of the activities that the Illinois EPA believes may resolve the speci?ed alleged violations. Due to the nature and seriousness of the alleged violations, please be advised that resolution of the violations may also require the involvement of a prosecutorial authority for purposes that may include, among others, the imposition of statutory penalties. A written response, which may include a request for a meeting with representatives of the Illinois EPA, must be submitted via certi?ed mail to the Illinois EPA within 45 days of receipt of this letter. If a meeting is requested, it shall be held within 60 days of receipt Of this notice. The response must include information in rebuttal, explanation, or justi?cation of each alleged violation and a statement indicating whether or not the facility wishes to enter into a Compliance Commitment Agreement (CCA) pursuant to Section 31(a) of the Act. If the facility wishes to enter into a CCA, the written response must also Include proposed terms for the CCA that includes dates for achieving include steps to be taken to achieve compliance and the necessary dates by which compliance will be achieved. IEPA - 011151011 0F RECORDS REIEASABLE NOV 0 5 2014 REV1EWER EAV 4302 N. Maln 57., Rockford, IL 61 103 (815)987-7760 951 I Harrlron 51., Des Plaines, 11. 60016 (847)294-4000 595 S. State, Elgln, II. 60 23 (847)608-3l3l 5407 N. University 51., Arbor 1 13, Peoria, 11. 6l6l4 (309)693-5462 2I25 S. First 51., Champalgn, IL 61820 (217)278-5800 2309 W. Maln St, 50th I I6, Marlon, II. 62959 (6 18)993-7200 2009 Mall 51., IL 62234 (6I8)346-5l20 I00 W. Randolph, Sol" 1 1-300, Chlcogo, IL 6060l 14-6026 PHASE PRINT ON RECYCIED PAPR Page 2 of 2 ID: 6293 Dynegy Midwest Generation Vermilion Power Station VN W-2012-00071 The Illinois EPA will review the proposed terms for a CCA provided by the facility and, within 30 days of receipt, will respond with either a proposed CCA or a notice that no CCA will be issued by the Illinois EPA. If the Illinois EPA sends a proposed CCA, the facility must respond in writing by either agreeing to and signing the proposed CCA or by notifying the Illinois EPA that the facility rejects the terms of the proposed CCA. If a timely written response to this Violation Notice is not provided, it shall be considered a waiver of the opportunity to respond and meet, and the Illinois EPA may proceed with referral to a prosecutorial authority. Written communications should be directed to: Illinois EPA Division of Public Water Supplies Attn: Andrea Rhodes, CA8 #19 P.O. BOX 19276 Spring?eld, IL 62794-9276 All communications must include reference to this Violation Notice number, W-2012-00071. Questions regarding this Violation Notice should be directed to Andrea Rhodes at 217/785-0561. Sincerely, 747/ Michael Crumly Manager, Compliance Assurance Section Division of Public Water Supplies Bureau of Water Attachments CASE ID: 20l2?009 PAGE NO . 1 OE' 3 ATTACHMENT A DYNEGY MIDWEST GENERATION LLC ; VERMILION POWER STATION, ID : 6293 VIOLATION NOTICE NO . W-2012-00071 : A review of information available to the Illinois EPA indicates the following on-going violations of statutes , regulations, or permits . Included with each type of violation is an explanation of the activities that the Illinois EPA believes may resolve the violation. Groundwater Q?ality No person shall cause , threaten or allow the release of any contaminant to a resource groundwater such that: treatment or additional treatment is necessary to continue an existing use or to assure a potential use of such groundwater; or an existing or potential use of such groundwater is precluded. No person shall cause, threaten or allow the release of any contaminant to groundwater so as to cause a groundwater quality standard to be exceeded . Dynegy Midwest Generation, LLC must take actions to mitigate existing contamination and prevent the continuing release of contaminants into the environment. Violation Description Operations at ash impoundments have resulted in violations of the Groundwater Quality Standards at monitoring well MW-04 for the following constituents: Parameter Boron Boron Boron Boron Manganese Manganese Manganese Manganese Sample 7.8 7.1 5.7 4.9 1. 0 0.9 1. 0 0 . 91 Value mg/1 mg/l mg/1 mg/l mg/1 mg/l mg/1 mg/l GW Standard 2.0 mg/l 2 . 0 mg/l 2.0 mg/l 2.0 mg/l 0.15 mg/l 0.15 mg/l 0 . 15 mg/1 0.15 mg/l Collection Date 10/10/2011 07/27/2011 05/24/2011 03/08/2011 10/10/2011 07/27/2011 05/24/2011 03/08/2011 Rule/Reg. Section 12 of the Act, 415 ILCS 5/12, 35 Ill. 620.115 , 620.301, 620.401, 620.405, and 620.410. Adm. Code PAGE NO. 2 OF 3 ATTACHMENT A DYNEGY MIDWEST GENERATION LLC ; VERMILION POWER STATION , ID : 6293 VIOLATION NOTICE NO . W-2012 - 00071 : Violation Description Operations at ash impoundments have resulted in violations of the Groundwater Quality Standards at monitoring well MW-05 for the following constituents: Parameter Boron Boron Boron Boron Manganese Manganese Manganese Manganese Sulfate Sulfate Sulfate Sample 22 19 19 20 0.34 0.31 0.29 0.31 480 450 410 Value mg/l mg/1 mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l GW Standard 2.0 mg/l 2.0 mg/l 2.0 mg/1 2.0 mg/l 0.15 mg/l 0 . 15 mg/l 0.15 mg/l 0.15 mg/l 400 mg/l 400 mg/l 400 mg/l Collection Date 10/10/2011 07/27/2011 05/24/2011 03/08/2011 10/10/2011 07/27/2011 05/24/2011 03/08/2011 10/10/ 2 011 07/27/2011 05/24/2011 Rule/Reg. Section 12 of the Act, 415 ILCS 5/12 , 35 Ill. Adm. Code 620.115, 620.301 , 620.401, 620.405 , and 620.410. Violation Description Operations at ash impoundments have resulted in violations of the Groundwater Quality Standards at monitoring well MW-08R for the following constituents: Parameter pH Boron Boron Boron Manganese Sulfate Sulfate Sulfate TDS TDS TDS Rule/Reg. Sample 6.35 40 37 29 0.22 1,500 1,300 1,000 2,200 2,000 1,700 Value SU mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l GW Standard 6.5-9.0 SU 2.0 mg/l 2.0 mg/l 2 . 0 mg/1 0 . 15 mg/l 400 mg/l 400 mg/l 400 mg/1 1 , 200 mg/1 1 , 200 mg/l 1,200 mg/l Collection Date 10/10/2011 10/10/2011 07/27/2011 05/24/2011 05/24/2011 10/10/2011 07/27/2011 05/24/2011 10/10/2011 07/27/2011 05/24/2011 Section 12 of the Act, 415 ILCS 5/12, 35 Ill. 620 . 115, 620.301, 620.401, 620.405 , and 620.410 . Adm. Code PAGE NO. 3 OF 3 ATTACHMENT A DYNEGY MIDWEST GENERATION LLC ; VERMILION POWER STATION, ID : 6293 VIOLATION NOTICE NO . W-2012-00071 : Viol.ation Description Operations at ash impoundments have resulted in violations of the Groundwater Quality Standards at monitoring well MW- 34 for the following constituents: Parameter Iron Iron Rule/Reg. Sample Value 5.3 mg/l 5 . 7 mg/l GW Standard 5.0 mg/l 5 . 0 mg/l Collection Date 07/26/2011 03/08/2011 Section 12 of the Act , 415 ILCS 5/12, 35 Ill. 620.115, 620 . 30 1 , 620.401 , 620.405, and 620.410. Adm. Code